当前位置：文档库 › D661valves-(moog伺服阀样本)

D661valves-(moog伺服阀样本)

CAUTION

DISASSEMBLY

, MAINTENANCE, OR REPAIR OTHER THAN IN ACCORDANCE WITH THE INSTRUCTIONS HEREIN OR OTHER SPECIFIC WRITTEN DIRECTIONS FROM MOOG WILL

INVALIDATE MOOG’S OBLIGATIONS UNDER ITS WARRANTY .

D661 Series ISO 4401 Size 05

Installation and Operation Instruction

Servo and Proportional Control Valves with Integrated Electronics

1. INTRODUCTION

This manual provides instructions and procedures necessary

to install, operate and troubleshoot the Moog D661 Series Servo and Propor-tional Control Valves.

2. OPERATION

General

The Servovalves D661-G, S and H Series and the Proportional Flow Control Valves D661-P Series are throttle valves for 2-, 3- and 4-way

applications. With proportional flow control valves, 5-way applications are also possible. These valves are suitable for electrohydraulic position, velocitiy,pressure or force control systems with high dynamic response requirements.D661-G, S and H

The spool of the main stage is driven by a nozzle flapper or ServoJet ?

pilot stage, optional with or without additional mechanical feedback (nozzle flapper only).

With versions D661-S and H in case of an electrical supply failure

the spool is moved into a preferred position by action of an additional mechanical feedback.

E LE CTROHYDRAULIC VALVE CUT -AWAY

Figure 1 Moog Series D661-G Series, without additional mechanical feedback

X T A P B

T 2Y

Connector

Spool

Bushing

Screw Plug for Null Adjust

Series Models Series G

Servovalve with nozzle-flapper or ServoJet ? pilot stage, spool in bushing, without additional mechanical feedback

Series S Servovalve configured like version G, but with additional mechanical feedback

Series H Servovalve configured like version S, but with improved performance (high response)

Series P ...A/B Proportional valve with ServoJet ? pilot stage, spool in body ,without additional mechanical feedback

Series P ...F/G

Proportional valve configured like version P ...A/B, but with nozzle flapper pilot stage and additional mechanical feedback

Jet pipe Annular area

Nozzle

Receiver

Operating Principle of the T wo-Stage Valve

An electric input signal (flow rate command) is applied to the integrated control amplifier which drives a current through the coils of the pilot stage torque motor. Thus the deflected nozzle-flapper system produces a pressure difference across the drive areas of the spool and effects its movement. The position transducer which is excited via an oscillator measures the position of the spool (actual value, position voltage).

This signal is then rectified by a demodulator and is fed back to the control amplifier where it is compared with the command signal. The control amplifier drives the torque motor until command voltage and feedback voltage are equal.Thus, the position of the spool is proportional to the electric command signal.

Proportional Flow Control Valve D661-...P

The nozzle flapper design of the pilot stage has been converted into an improved version with jet pipe amplifier (ServoJet ?).

The ServoJet ? pilot stage consists mainly of torque motor, jet pipe and receiver.

A current through the coil displaces the jet pipe from neutral. This displacement combined with the special shape of the nozzle directs a focussed fluid jet more into one receiver bore than into the other.

The jet now produces a pressure difference in the control ports. This pressure difference results in a pilot flow, which in turn causes a spool displacement. The pilot stage drain is through the annular area around the nozzle to tank.

Operating Principle of the T wo-Stage Valve

An electric input signal (flow rate command) is applied to the integrated control amplifier which drives a current through the coil of the pilot stage torque motor. The thus deflected jet pipe produces a pressure difference across the drive areas of the spool and effects its movement.

The position transducer which is excited via an oscillator measures the position of the spool (actual value, position voltage). This signal is then demodulated and fed back to the controller where it is compared with the command signal. The controller drives the torque motor until the error between command signal and feedback signal is zero. Thus the position of the spool is proportional to the electric command signal.

Failsafe Version D661-...P

For applications with proportional control valves where certain safety regulations are applicable, a defined metering spool position is needed in order to avoid potential damage. Therefore, failsafe versions are offered as an option for the MOOG proportional valves.

After external triggering, this failsafe function causes a defined metering spool position.

Mechanical Failsafe version (biased pilot stage with mechanical feedback)

The safe position of the spool will be obtained after cut off of pilot pressure supply (external pilot connection) or operating pressure supply D661-P ...A/BW

D661-P ...A/BU Proportional Valve D661-P ...A/BW

and D661-P ...A/BU Series with electrically operated failsafe function

Proportional Valve D661-P ...AP Series

with electrically operated failsafe function

2- stage Proportional Valve D661-...P ...A/B Series

Servovalve D661 - ...S and H Series with additional mechanical feedback

Electric characteristics of the 2/2-way solenoid valve

Function

electro magnetic Nominal voltage 24 VDC Nominal power

12 W

DIN 43650-1Form A: 2+PE-PG9

With failsafe versions R and L, a defined spool position is reached when the electric supply to the valve electronics is switched off

while the pilot pressure is still applied. With version M, the resulting spool position is undefined.

Electrically operated failsafe version

The safe position of the spool will be obtained after switching off the integrated 2/2-way solenoid seat valve.

With failsafe versions W , U and G, after cut-off of the solenoid, the spool moves to midposition. When the electric supply to the valve

electronics is switched off while the pilot pressure is still effective and the solenoid is still switched on, the spool will move to a defined end position with versions U and G.

With failsafe version P , the integrated seat valve will shut off the external pilot pressure after switching off the solenoid.

Cutting off the 24 VDC supply to the solenoid operated 2/2-way seat valve

o protect relay contacts or semiconductors against damage, a Zener diode is required

)With version P at 210 bar pilot or operating pressure,

with versions G ,S and H at 140 bar pilot or operating pressure,fluid viscosity of 32 mm?/s and fluid temperature of 40°C.2

)For long life wear protection of metering lands

For additional technical information such as dimensions, ordering information, etc., see the D660 series catalog.

T echnical Data

Internal/External Pilot Connection a.Conversion for operation with internal or external pilot connection.

The pilot connection mode as shipped is indicated by the respective code letter of the type designation on the nameplate.

With the 5-way version, where the T and T 2 ports are interchanged

with the P port, pilot supply port X and return port

Y must be connected externally.4

3. SAFETY INSTRUCTIONS

Warnings and Symbols a.

Refers to special orders and prohibitions to prevent damage b.

Refers to special orders and prohibitions to prevent injury or extensive damage

Correct Application a.The D661 Series Valves are control valves suited for electrohydraulic

position, velocity, pressure and force control.b.The valves are designed for flow control in hydraulic systems that

operate with mineral oil based fluids. Others upon https://www.wendangku.net/doc/9b6021792.html,ing the valves for purposes other than those mentioned above is

considered contrary to the intended use. The user bears entirely the risk of such misuse.

d.Correct application involves also observing the operating instruction and

complying with the inspection and maintenance directives.

Organizational Measures a.We recommend including this operating instruction into the

maintenance plan of the machine/plant.b.In addition to the operating instruction, observe also all other generally

applicable legal and other mandatory regulations relevant to accident prevention and environmental protection. Instruct the operator accordingly.c.All safety and danger prevention instructions of the machine/plant must

meet the requirements of EN 982.Selection and Qualification of Personnel a.Only well-trained and instructed personnel are allowed to work with Moog

control valves.b.Work with electrohydraulic valves must be carried out only by personnel

having special knowledge and experience in plants running with electrohydraulic controls.Safety Instructions for Specific Operational Phases a.T ake the necessary precautions to ensure that the machine/plant is

used only when in a safe and reliable state.b.Check the machine/plant at least once per working shift for obvious

damage and defects (i.e. leakage). Report any changes to the responsible group/person immediately. If necessary, stop the machine immediately and secure it.c.In the event of malfunctions, stop the machine/plant immediately and

d.If the machine/plant is completely shut down for maintenance and repair

work at the valve, it must be secured against inadvertent start up by:? Locking the principal control elements and removing the key.

? Attaching a warning sign to the main switch.

Safety Instructions for the Operation of Hydraulic Plants

a.Work on electrohydraulic equipment must be carried out only by personnel

b.Check all lines, hoses and fittings of the plant regularly for leaks and

obvious damage. Repair damage immediately.c.Before removing the valve, depressurize all system sections to be

opened, pressure lines and accumulators of the hydraulic system in accordance with the specific instructions for the plant.d.When handling oil, grease and other chemical substances, observe safety

regulations valid for each product.

4. INSTALLATION

General Information https://www.wendangku.net/doc/9b6021792.html,pare model number and valve type with information from the

hydraulic schematic or bill of material.b.The valve can be mounted in any direction, fixed or moving.c.Check mounting surface flatness (0.02 mm for 100 mm) and

surface finish (Ra <1 μm)d.Pay attention to cleanliness of mounting surface and surroundings when

installing the https://www.wendangku.net/doc/9b6021792.html,e lint-free tissue to clean!f.Before installation, remove shipping plate from the valve and save it

for later use.g.Pay attention to correct position of ports and location of o-rings during

https://www.wendangku.net/doc/9b6021792.html,e M6 x 60 socket head bolts according to DIN 912 for mounting,

strength class 10.9 or 12.9, and cross torque to 13 Nm (tolerance ±10 %)

Electric Null adjust

(behind screw plug)

Set screw 4M4 x 6

Set screw 1M4 x 6

Set screw 2M4 x 6

Set screw 3M4 x 6

X 1)

P Y

Filter

Servovalve D661 G

without mechanical feedback

and Proportional Valve D661 P ...A/B

Pilot Flow Set Screw M4 x 6Supply bore 1bore 2Internal P closed open External X open

closed

Pilot Flow Set Screw M4 x 6Return bore 3bore 4Internal T closed open E xternal Y

open

closed b.Conversion instruction for Servovalves D661-G and Proportional

valves D661-P ...A/B

) Check for sufficient length (100 mm) of mounting surface!

...P ...A/B

D661-...P 5

c.Conversion instruction for Servovalves D661-S, H and P ...F/G screw plug

M4 x 8 DIN 6912-8.8with metal sealring U4,5-7-1

Filter

Electric Nulladjust

(behind screw plug)

X P

Pilot Flow Screw Plug Supply In Port

Internal P X External X

5. SETTING UP

This information is valid for new installations to be put into operation as well as for repair cases.

Filling the Hydraulic System

New oil is never clean. Therefore, the system should generally be filled by using a filling filter .This fine mesh filter should at least comply

with the following requirement: ?10 ≈ 75 (10 μm absolute).

Flushing the Hydraulic System

Before the hydraulic system is put into operation for the first time (also after modifications), it has to be flushed carefully

according to the instructions of the manufacturer of the plant / machine.

Before flushing, suitable flushing elements have to be inserted in the pressure filters instead of the high pressure elements.

Before flushing, the operational temperature of the hydraulic system should be achieved. Observe temperature!

A flushing plate or, if the system allows, a directional valve should be mounted in place of the Moog porportional valve. The P- and T

-connections are flushed through the flushing plate. The user A- and B-Attention: The directional valve can lead to unpermissable

movements in the load (i.e. with parallel drives), which may result in damage of the plant / machine. Instructions of the manufacturer have to be strictly observed.

Minimum flushing time t can be calculated as follows:

The flushing process can be considered completed when a system cleanliness of 15/12 according to ISO 4406 or 6 according to NAS

1638 or better is achieved. A long life of the metering lands of the proportional valve can be expected for this cleanliness class.

V = content of reservoir [gallons]Q = flow rate of the pump [gpm]

t = V ? 5

Replace flushing elements in the pressure filters by suitable high pressure elements after flushing. Install Moog proportional valve instead of flushing plate or directional valve.

Setting Up a.

Set up machine/plant according to the operation instructions of the manufacturer after the valves have been installed. Vent hydraulic system!

The safety instructions of the machine/plant manufacturer must be observed. Especially the safety requirements for machines like injection molding machines (EN 201), blow molding machines (EN 422) and die casting machines (EN 869), to name a few, are important.c.Observe oil temperature.

Check hydraulic system for external leakage!

6. MAINTENANCE

Besides regular visual inspection for external leakage and filter replacement, maintenance work at the D661 Series valves is not required.

Explosion proof valves D661K... must not be opened by the customer! Unauthorized opening will invalidate the explosion proof approval! Return failed valve to the factory.

Moog valves can only be repaired at Moog Service Centers (for addresses see back page of this operation instructions).Filter Replacement

The built-in filter disk protects orifices and nozzles against coarse contaminants. W ith severe contamination, the valve response will be reduced.

Replace filter!

Cleaning the filter is useless and may be dangerous!

Before starting to work on the valve, clean the external surface around the filter cover!

Attention: The filter disk (21) flows from inside to the outside.

After removal of the cover (20) any contamination particles are on the inside

of the disk (21) and therefore, cannot be seen from outside.a.

Remove four internal hex bolts (38) using A llen wrench (3 mm). Remove

cover (20). Remove the filter disk (21) now accessible by using a scriber or a fine screwdriver as extraction tool.b.

(53) for damage.Replace if necessary.

Insert o-ring (53) first. Then insert the new filter disk (21) such that the side with the notch at the rim points outward. Mount o-ring (59) on the cover (20) using clean grease, and mount cover to the valve body.T orque the four bolts (38) to 4 Nm (35 in-lb).d.

Check valve for external leakage after pressurizing it.

ELECTRONICS INFORMATION

Valve connectors

Possible connectors Please note information regarding input signals on the nameplate!

Valve electronics with supply voltage ± 15 VDC and 6+PE pole connector Number Supply Voltage

of Pins ± 15 VDC 24 VDC

6 + PE X X 11 + PE

–X 11 + 1 (PE) Bayonet X –6 (old, without PE)

X –12 (old, without PE) Bayonet

–

Command input

Command signal 0 to ±10 V

The spool stroke of the valve is proportional to (U D – U E ). 100% valve opening P ? A and B ? T is achieved at (U D –U E ) = +10 V . At 0 V command the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is

available, pin D or E is connected to signal ground (pin C) according to the required operating direction (to be done at the mating connector).Command signal 0 to ±10 mA

The spool stroke of the valve is proportional to (I D –I E ).100% valve opening P ?A and B ?T is achieved at (I D –I E )= +10 mA. At 0 mA command the spool is in the center position.

Either pin D or E is used according to the required operating direction. T he unused pin is left open (not connected at the mating connector). The input pins D and E are inverting.

Monitoring output

Actual value 0 to ±10 V

The actual spool position value can be measured at pin F . This signal can be used for monitoring and fault detection purposes.

The spool stroke range corresponds to ±10 V . +10 V corresponds to 100% valve opening P ? A and B ? T .

Actual value 0 to ±10 mA

The actual spool position value can be measured at pin F . This signal can be used for monitoring and fault detection purposes.

The spool stroke range corresponds to ±10 mA. +10 mA corresponds to 100% valve opening P ? A and B ? T .

Connector Wiring - T ype code S (see sticker on the electronics housing)

Valve electronics with supply voltage ± 15 VDC and 11+1 pole bayonet connector

Alternate connector for certain valve models a.

Command input

Command signal 0 to ±10 V

The spool stroke of the valve is proportional to (U D – U E ). 100% valve opening P ? A and B ? T is achieved at (U D –U E ) = +10 V . At 0 V command the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is available, pin D or E is connected to signal ground (pin C) according to the required operating direction (to be done at the mating connector).Command signal 0 to ±10 mA

The spool stroke of the valve is proportional to (I D – I E ).100% valve opening P ? A and B ? T is achieved at (I D – I E ) = +10 mA. At 0 mA command the spool is in the center position. Either pin D or E is used according to the required operating direction. T he unused pin is left open (not connected at the mating connector). The input pins D and E are inverting.

Command signal 4 to 20 mA

The spool stroke of the valve is proportional (I D –12 mA). 100% valve opeming P ? A and B ? T at I D = 20 mA. At 12mA command the spool is in the center position.

The unused Pin E is left open (not connected in the mating connector).

Monitoring output

The actual spool position value can be measured at pin F .

This signal can be used for monitoring and fault detection https://www.wendangku.net/doc/9b6021792.html,mand signal 0 to ±10 V

The spool stroke range corresponds to ±10 V .

+10 V corresponds to 100% valve opening P ? A and B ? T .Command signal 0 to ±10 mA

The spool stroke range corresponds to ±10 mA.

+10 mA corresponds to 100% valve opening P ? A and B ? T .Command signal 4 to 20 mA

The spool stroke range corresponds to 4 to 20 mA.

20 mA corresponds to 100% valve opening P ? A and B ?T .

Please note "General Requirements" on page 6.

Connector Wiring - T ype code V (see sticker on the electronics housing)

Connector Wiring - Type code 6

Valve electronics with supply voltage ± 15 V DC and 6 pole connector (without protective grounding)a.

Command input

Command signal 0 to ±10 V

The spool stroke of the valve is proportional to (U D – U E ). 100% valve opening P ? A and B ? T is achieved at (U D –U E ) = +10 V . At 0 V command the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is

available, pin D or E is connected to signal ground (pin C) according to the required operating direction (to be done at the mating connector).Command signal 0 to ±10 mA

The spool stroke of the valve is proportional to (I D – I E ).100% valve opening P ? A and B ? T is achieved at (I D – I E )= +10 mA. At 0 mA command the spool is in the center position.

Either pin D or E is used according to the required operating direction. T he unused pin is left open (not connected at the mating connector). The input pins D and E are inverting.

Command signal 4 to 20 mA

The spool stroke of the valve is proportional (I D –12 mA). 100% valve opeming P ? A and B ? T at I D = 20 mA.

At 12mA command the spool is in the center position.

The unused Pin E is left open (not connected in the mating connector).

Monitoring output

The actual spool position value can be measured at pin F.

This signal can be used for monitoring and fault detection https://www.wendangku.net/doc/9b6021792.html,mand signal 0 to ±10 V

The spool stroke range corresponds to ±10 V .

+10 V corresponds to 100% valve opening P ? A and B ? T .Command signal 0 to ±10 mA

The spool stroke range corresponds to ±10 mA.

+10 mA corresponds to 100% valve opening P ? A and B ? https://www.wendangku.net/doc/9b6021792.html,mand signal 4 to 20 mA

The spool stroke range corresponds to 4 to 20 mA.

20 mA corresponds to 100% valve opening P ? A and B ? T.

Valve electronics with supply voltage ± 15 V DC and 12 pole bayonet connector (without protective grounding)a.

Command input

Command signal 0 to ±10 V

The spool stroke of the valve is proportional to (U D – U E ). 100% valve opening P ? A and B ? T is achieved at (U D –U E ) = +10 V . At 0 V command the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is

Monitoring output

The actual spool position value can be measured at pin F .

This signal can be used for monitoring and fault detection https://www.wendangku.net/doc/9b6021792.html,mand signal 0 to ±10 V

The spool stroke range corresponds to ±10 V .

+10 V corresponds to 100% valve opening P ? A and B ? T .Command signal 0 to ±10 mA

Valve electronics with supply voltage 24 Volt and 6+PE - pole connector a.

Command input

Command signal 0 to ±10 V

The spool stroke of the valve is proportional to (U D – U E ). 100% valve opening P ? A and B ? T is achieved at (U D –U E ) = +10 V.At 0 V command the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is available, pin D or E is connected to signal ground (pin B) according to the required operating direction (to be done at the mating connector).Command signal 0 to ±10 mA

The spool stroke of the valve is proportional to (I D – I E ). 100% valve opening P ? A and B ? T is achieved at (I D – I E ) = +10 mA. At 0 mA command the spool is in the center position.

Either pin D or E is used according to the required operating direction.The unused pin is left open (not connected at the mating connector).The input pins D and E are inverting.

Monitoring output

Actual value +2,5 to +13,5 V

Valves with voltage and current command input

The actual spool position value can be measured at pin F (see diagram below). This signal can be used for monitoring and fault detection purposes.

The spool stroke range corresponds to +2,5 to +13,5 V . The center position is at +8 V . +13,5 V corresponds to 100% valve opening P ? A and B ? T.

Valve electronics with supply voltage 24 V olt and 11+PE - pole connector a.

Command input

Command signal 0 to ±10 V

The spool stroke of the valve is proportional to (U D – U E ). 100% valve opening P ? A and B ? T is achieved at (U D –U E ) = +10 V . At 0 V command the spool is in the center position.

The input stage is a differential amplifier. If only one command signal is

available, pin D or E is connected to signal ground (pin B) according to the required operating direction (to be done at the mating connector).Command signal 0 to ±10 mA

The spool stroke of the valve is proportional to (I D – I E ). 100% valve opening P ?A and B ? T is achieved at (I D – I E ) = +10 mA. At 0 mA command the spool is in the center position.

Either pin D or E is used according to the required operating direction.The unused pin is left open (not connected at the mating connector). The input pins D and E are inverting.

Monitoring output

Actual value 0 to ±10 V

Valves with voltage and current command input

The actual value, i. e. the spool position, can be measured between pins 6 and 7. This signal can be used for monitoring and fault detection purposes. The signal can only be measured using a weighted differential amplifier (see dia-gram below) or a voltmeter with an input impedance greater than 1M ?. T he spool stroke range corresponds to ±10 V . The centered position is at 0 V .+10 V corresponds to 100% valve opening P ? A and B ? T .

If the actual value will be used with a machine control system, the differential input circuit must be used. Another option is to use the aforementioned circuit for the 6+PE pole connector. Pin 6 according to DIN 43 651corresponds to pin F according to DIN 43 563 (see diagram page 12).

Circuit diagram for measurement of actual value U 6-7 (position of main spool) for valves with 11+PE pole connector

Connector Wiring - Type code letter E (see sticker on the electronics housing)

Please note "General Requirements" on page 10.

8. TOOLS AND EQUIPMENT

a.5mm Allen wrench

b.3mm Allen wrench

https://www.wendangku.net/doc/9b6021792.html,rge blade screwdriver

d.Small screwdriver

e.Scriber or small screwdriver

Clean grease (mounting and insertion of O-rings)

The D661 Series valves require tools for installation, set up, null adjustment and filter replacement.

? Installation of the valve

? Mounting of the D661 Series requires 5mm Allen wrench ? Null adjust of the valve at set up

? Large blade screwdriver to remove the cover screw

(see cut-away diagram on page 1)

? Small screwdriver for zero setting on internal potentiometer

Replacement Parts

Part Description D661-Qty.

Part Number O-Ring, ports P , T , A, B, (T 2)all 542082-004O-Ring, ports X&Y all 242082-011Replaceable Filter Disk P ...A/B 1A67999 200Replaceable Filter Disk G, S, H & P ...F/G 1A67999 100O-Ring, behind filter disk all 1A25163 013 015O-Ring, for filter cover P ...A/B

1B97009 080O-Ring, for filter cover

G, S, H 1A25163 017 020Allen Setscrew, ports X & Y G & P 266166 040 006Screw plug, port X S & H 166098 040 006Seal, port X S & H

A25528 040

Accessories (not part of the valve delivery)

Part Description

D661-

Qty.

Part Number

Mating Connector ,

waterproof, protection IP65 6+PE-pole DIN 43563B97007 061 11+PE-pole

DIN 43651

B97024 111 11+1-pole (Bayonet)MIL C-26482/14-12B97027 012 6-pole

MIL C-5015/14S-6

A26201 004 12-pole (Bayonet)MIL C-26482/14-12B97027 012

Mounting Manifolds See special data sheet Mounting Bolts

M6x60 DIN 912-10.9...G and ...P 4A03665-060-060 M6x55 DIN 912-10.9...H and ...S

A03665-060-055Flushing Plate

B67728-001Flushing Plate B67728-002Flushing Plate

B67728-003

7. ELECTRICAL NULL ADJUSTMENT

The hydraulic null of the valve is preset at the factory with a tolerance of ± 2% of rated signal. If necessary, this null can be readjusted by the user of the valve.a.

null! Contact machine/plant manufacturer.

Procedure: Remove the command signal to the valve only by disconnecting command signal lead at the cabinet.

Remove cover screw on electronics housing to access the null adjust potentiometer. Use a small screwdriver (blade width 2.5 mm) to turn the potentiometer screw either clockwise or counterclockwise. Usually it will not be necessary to turn the screw more than 2 turns in either direction (± 1 turn is equivalent to ± 15% null shift).c.

While adjusting, watch the actuator (motor) motion to find the null position. With overlapped valves, turn the null adjust screw carefully in both directions to just start motion and then back into deadzone midposition between those two screw positions.

After proper null adjustment, reconnect the command signal lead and install protective cover screw again.

Probable Cause

1. Seals damaged or missing.

2. Required torque is incorrect.

1. Loss of hydraulic pressure.

2. Loss of supply voltage.1. Unstable external loop.2. Valve electronics defective.1. Power supply problem.2. Incorrect null adjust.

1. Orifice contaminated.

9. TROUBLESHOOTING CHART

The following troubleshooting chart lists potential troubles encountered, probable causes and remedies.

Potential T rouble

Leakage at the mounting surface of the valve.

No hydraulic response of the valve.

Instability of the system, plant oscillates.

With zero command signal, the load drifts slowly off position (open loop).

With hydraulics on, valve goes hardover.

Remedy

1. Make sure all seals are installed at ports A, B, P , T, X and Y are ok.

2. Tighten mounting bolts.

1. Check all signals from Pin A to Pin F .

2. Check the mating connector for corrosion.

1. Check whether output signal at Pin F (6) is following exactly the command signal at Pin D.

2. Send to Moog factory for repair.

1. With ±15 VDC supply, check for supply voltage at pins A and B being stable within ±3% of 15V

2. With both ±15 VDC and 24 VDC supply, at zero command and normal operation temperature,stop load motion by adjusting nulladjust potentiometer (behind screw plug).1. Send to Moog factory for repair.

10. AUTHORIZED REPAIR FACILITIES

If servovalve continues to malfunction after all recommended corrective action procedures are performed, defective valve should be returned to Moog for repair. Moog does not authorize any facilities other than Moog or Moog subsidiaries to repair its servovalves. It is

recommended you contact Moog at (716)655-3000 to locate your closest Moog repair facility. Repair by an independent (unauthorized) repair house will result in voiding the Moog warranty and could lead to performance degradation or safety problems.

11. DECLARATION OF MANUFACTURER

A Declaration of Manufacturer according to EC machine directive 89/392/EWG, Annex II B, is available for servo and proportional valves D661Series and will be supplied upon request.

Type designation

Model-Number ORDERING INFORMATION

Type designation

Model-Number *SV:Solenoid valve **VE:

Valve electronics

D661SERIES INSTALLATION AND OPERATION INSTRUCTION

Moog Inc., E ast Aurora, NY 14052-0018Telephone: 716/655-3000Fax: 716/655-1803

Toll Free: 1-800-272-MOOG https://www.wendangku.net/doc/9b6021792.html,

CDS6845 500-406 1102

The products described herein are subject to change at any time without notice, including, but not limited to, product features, specifications, and designs.

HUSKY注塑机MOOG伺服阀维修

维修注塑机MOOG伺服阀伺服阀故障维修：伺服阀是电液伺服控制系统中的重要控制元件，在系统中起着电液转换和功率放大作用。具体地说，系统工作时，它直接接收系统传递来的电信号，并把电信号转换成具有相应极性的、成比例的、能够控制电液伺服阀的负载流量和负载压力的信号，从而使系统输出较大的液压功率，用以驱动相应的执行机构。电液伺服阀的性能和可靠性将直接影响系统的性能和可靠性，是电液伺服控制系统中引人瞩目的关键元件。电气一机械转换器，可产生与电指令信号成比例的旋转运动，用在伺服阀的输入级。力矩马达包括电气线圈、极靴和衔铁组件等。衔铁、挡板和反馈杆钢性固接，并由固接在衔铁上的薄壁弹簧管支撑，弹簧管下端与安装盘固接，弹簧管在力矩马达和阀的液压段之间起流体密封作用。两个电气线圈环绕着衔铁，位于弹簧管的两侧。电气线圈的位置、衔铁的运动空间、永磁铁被固定在上下两个极靴所形成的空间中. M0OG伺服阀|穆格伺服阀的性能分类MOOG伺服阀主要用在电气液压伺服系统中作为执行元件,根据其穆格伺服阀的性能主要有以下分类:穆格伺服阀D633直动式伺服阀 M0OGD633,直动阀(DDV)是具有内部阀芯位置电反馈的伺眼阀。与只能产生单方向驱动力的比例电磁铁相比,永磁式线性力马达可直接双向驱动阀芯,对中弹簧作用在阀芯上使其复位。阀芯的位置反馈和脉宽调制(PWM)电路全部集成在阀中。由于采用阀芯位置电反馈和大驱动力的线性力马达,DDV阀具有很高的分辨率,并使系统具有优良的控制性能。阀内电路板包含了用于驱动线性力马达的脉宽调制(PWM)和控制阀芯位置的电路，电路板按IP65防护等级安装在阀体内。D633和D634直动阀内的电路为伺服阀和用户的系统计算机建立了一个简单的操作界面。如果系统电源切断时,阀内的阀芯对中弹簧可将阀芯回复至中位,而无需使用外力。穆格伺服阀D633系列常用型号: D633-399B;D633-313B;D633-303B;D633-320B;D633-460B;D633-328B;D633-4007; D633-304B穆格伺服阀G761系列伺服阀(两级伺眼阀)产品说明t穆格伺服阀G761系列伺服阀是具有机械反馈先导级的两级流量控制伺服阀.该系列电液伺服阀是可用作三通和四通节流型流量控制阀,具有响应快,搞污染等特性。穆格伺服阀常用型号:G761-3001; G761-3002;G761-3003;G761-3004;G761-3005;J761-001;J761-002;J761-003; J761-004等等。穆格伺服阀G761系列常期用于钢厂和试验机,是可用作三通和四通节流型流量控制阀用于四通阀时控制性能更好.该系列阀为高性能的两极电液MOOG伺服阀, 在7Mpa额定压降下的额定流量为4L/min至63L/min.阀的先导级是一个对称的双喷嘴挡板阀,由干式力矩马达的双隙驱动;输出级是一个四通滑阀。阀芯位置由-悬臂弹簧杆进行机械反馈。穆格伺服阀该系列阀结构简单、坚固,工作可靠,使用寿命长。72系列伺服阀(两级伺服阀)产品说明:穆格伺服阀产品特点标准响应两级伺眼阀，带有可在现场更换的先导阀滤芯并可以采用外控式先导控制压力安装底面符合ISO10372标准。穆格伺服阀常用型号:072-559A;072-558A;072A560等.穆格伺服阀额定流量(@1000psi[70bar] 压降):25gpm[100/min]到60gpm[2271/min]阶跃响应(@3000psi[210bar]100%行程): 16-40ms穆格伺服阀G631系列伺服阀(机械反馈式伺服阀)穆格伺服阀产品说明:对于中空制品来说,控制型坯壁厚对于产品质量的提高和成本的降低非常重要。穆格伺眼阀制品在吹气成型过程中若没有得到有效控制,冷却后会出现厚薄不均的状况，厚薄不均的坯壁产生的应力也不同,薄的位置容易出现破裂。采用壁厚控制系统后，可使芯轴缝隙随理坯位置变化而变化,产生厚薄均匀的制品。耐冲击力试验表明,壁厚均匀的制品不仅强度有很大

电液伺服阀规格的选择

电液伺服阀规格的选择一、静态计算根据执行元件按照最佳负载匹配条件求得的最大负载流量LM Q 和压力LM P ，计算伺服阀的压降v P ?，再根据LM Q 和v P ?计算伺服阀样本对应参数Vs P ?，VS Q ，按照样本给出的阀压降Vs P ?和样本给出的额定负载流量VS Q 选伺服阀型号及规格。方法如下： 1、计算伺服阀供油压力： LM s P P *5.1= 2、计算阀压降： s v P P *3/1=? 3、伺服阀样本对应参数Vs P ?，最大负载流量LM Q ，阀压降v P ?计算样本中给定流量VS Q ： V VS LM VS P P Q Q ??=/* 4、根据伺服阀样本压降Vs P ?及额定流量VS Q ，选取伺服阀型号。已知：10LM P MPa =，20/min LM Q L =，液压固有频率80Hz ，假定选取MOOG 公司D761型号伺服阀，试选取伺服阀具体参数，并按照样本写出伺服阀传递函数。 1.5*15S LM P P MPa == 15105V P MPa ?=-= 23.66/min VS LM Q Q L = G761—3004 054/min V LS Q Q L = 230/54/40 1.35/(min*) 2.410/SV V K Q i L mA m AS -====?

2 2()2*0.61540540SV SV K G S s s =++ 1.2*1e-3/60/21e6=9.5e-13; 注意：为补偿一些未知因素，建议额定流量选择要大10%。二、动态指标的确定开环系统：伺服阀频宽大于3~4Hz ；闭环系统：计算系统的负载谐振频率，选相频大于该频率3倍的伺服阀。负载谐振频率计算如下：t t h v m eA 2^4βω=

MOOG伺服阀放大器

MOOG伺服阀放大器 MOOG伺服阀放大器J761-001/J761-004 MOOG伺服阀放大器，MOOG伺服阀放大器，MOOG伺服阀放大器，伺服阀放大器简介 MOOG伺服阀放大器J761-001/J761-004 SVC系列伺服放大器为电液伺服阀的驱动、控制专用控制器。该系列放大器能对射流管伺服阀、喷档伺服阀及国外各种电液伺服阀进行高精度控制，通过采用各种液压设备和测量传感器构成对位置、速度、加速度、力等物理量进行控制的电液伺服系统，如：阀控油缸、阀控马达、阀控泵等。特点 MOOG伺服阀放大器J761-001/J761-004 稳定可靠全部采用进口低飘移、高稳定度的运算放大器，使控制系统能长期、可靠、稳定地工作。灵活方便系统所需要调整的调零、输入增益反馈增益、放大增益、电流选择开关均设在仪器面板上。线路独特独特的功放电路设计，可适合各种电液伺服阀，并带有过流自动保护电路。电流输出直观采用数显电流表，流过阀线圈的电流明确，精度达到±0.1mA。维修方便

该控制器备有详细的电气原理图，并采用通用电气元件，具备一般电气知识的工程技术人员均可照图维修。原理框图 MOOG伺服阀放大器J761-001/J761-004 各型号及性能参数 MOOG伺服阀放大器J761-001/J761-004 SVC-Ⅰ型：为机箱式控制放大器，交流220V供电，输出电流可选择，并能直观地显示阀电流，不带颤振信号。性能参数如下：供电电源 AC220V 50Hz 输出电源DC±15V +5V 增益 K1=1.4 K2=1 K3=1~15mA/V 输入阻抗 33kΩ 输入指令Vpp≤±10V

D661valves-(moog伺服阀样本)

CAUTION DISASSEMBLY , MAINTENANCE, OR REPAIR OTHER THAN IN ACCORDANCE WITH THE INSTRUCTIONS HEREIN OR OTHER SPECIFIC WRITTEN DIRECTIONS FROM MOOG WILL INVALIDATE MOOG’S OBLIGATIONS UNDER ITS WARRANTY . D661 Series ISO 4401 Size 05 Installation and Operation Instruction Servo and Proportional Control Valves with Integrated Electronics 1. INTRODUCTION This manual provides instructions and procedures necessary to install, operate and troubleshoot the Moog D661 Series Servo and Propor-tional Control Valves. 2. OPERATION General The Servovalves D661-G, S and H Series and the Proportional Flow Control Valves D661-P Series are throttle valves for 2-, 3- and 4-way applications. With proportional flow control valves, 5-way applications are also possible. These valves are suitable for electrohydraulic position, velocitiy,pressure or force control systems with high dynamic response requirements.D661-G, S and H The spool of the main stage is driven by a nozzle flapper or ServoJet ? pilot stage, optional with or without additional mechanical feedback (nozzle flapper only). With versions D661-S and H in case of an electrical supply failure the spool is moved into a preferred position by action of an additional mechanical feedback. E LE CTROHYDRAULIC VALVE CUT -AWAY Figure 1 Moog Series D661-G Series, without additional mechanical feedback X T A P B T 2Y Connector Spool Bushing Screw Plug for Null Adjust Series Models Series G Servovalve with nozzle-flapper or ServoJet ? pilot stage, spool in bushing, without additional mechanical feedback Series S Servovalve configured like version G, but with additional mechanical feedback Series H Servovalve configured like version S, but with improved performance (high response) Series P ...A/B Proportional valve with ServoJet ? pilot stage, spool in body ,without additional mechanical feedback Series P ...F/G Proportional valve configured like version P ...A/B, but with nozzle flapper pilot stage and additional mechanical feedback

MOOG伺服阀D660系列阀卡D122034013C调试指导手册

MOOG伺服阀 D660系列速度/ 压力控制卡(D122-034-017C) 调试指导手册编制：海天科技部日期：2004.3.5

以下为D122-034-017C阀卡实样图调试区（16个电阻均需调节）监控区（其中5个红灯为动作逻辑指示）跳线区

一．对D122-034-017C阀卡功能的一些说明： 1．在对阀卡的调试过程中，和调试人员相关只有三个部分，包括调试区（R1-R16共16个电阻）、跳线区（J1-J23共23个跳线）、监控区（TP1-TP17共17个监控脚和5个逻辑指示灯） 2．调试人员调试工作要解决的问题包括以下几个方面： ■开环射退速度控制调节 ■保压压力控制调节 ■注射速度控制调节 ■注射压力控制调节 ■背压压力控制调节 3．可调电阻功能说明(R1-R16) ■ R1: 最大注射实际速度调节 ■ R2: 压力传感器零点（最小值）校正 ■ R3: 压力传感器量程（最大值）校正 ■ R4: 10%压力平衡线性校正 (需反复调整至最优) ■ R5: 90%压力平衡线性校正 (需反复调整至最优) ■ R6: 注射速度比例（P）増益调节 ■ R7: 注射速度积分（I）増益调节 ■ R8: 保压压力比例（P）増益调节 ■ R9: 保压压力积分（I）増益调节 ■ R10:背压压力比例（P）増益调节 ■ R11:背压压力积分（I）増益调节 ■ R12:背压信号偏置调节 ■ R13:射退速度信号偏置调节 ■ R14: 调节保压压力控制积分（I）增益延时时间 (15-100 ms) 调节 ■ R15: 注射压力限制（P）增益调节 ■ R16: 注射压力限制（I）增益调节 4．监测点功能说明（TP1-TP17） ■ TP1: 设定速度模拟量监控 (0 - +10V) ■ TP2: 实际反馈速度模拟量监控 (0 - +10V) ■ TP3: 设定压力模拟量监控 (0 - +10V) ■ TP4: 实际反馈压力模拟量监控 (0 - +10V) ■ TP5: 位置传感器正向输出监控 (0 - +10V) ■ TP6: 位置传感器反向输出监控 (0 - -10V) ■ TP7: 监测可调电阻 R2: (压力传感器零点调整点) ■ TP8: 监测R4调整压力10% 平衡输出 ■ TP9: 监测背压压力信号偏移电压(-15V - +15V) ■ TP10: 监测R13射退速度信号偏移调节点 ■ TP11: 监测伺服卡给伺服阀的电压信号 (-10V - +10V) ■ TP13: 模拟量信号地

穆格MOOG伺服阀

美国穆格MOOG伺服阀产品型号齐全，品牌价格优势！配件联系人：黄种局手机：151********QQ：871742874 MOOG伺服阀是MOOG公司研发的电液伺服控制中的关键元件知名品牌，它是一种接受模拟电信号后，相应输出调制的流量和压力的液压控制阀。电液伺服阀具有动态响应快、控制精度高、使用寿命长等优点，已广泛应用于航空、航天、舰船、冶金、化工等领域的电液伺服控制系统中。典型的MOOG伺服阀由永磁力矩马达、喷嘴、档板、阀芯、阀套和控制腔组成。当输入线圈通入电流伺服阀时，档板向右移动，使右边喷嘴的节流作用加强，流量减少，右侧背压上升；同时使左边喷嘴节流作用减小，流量增加，左侧背压下降。阀芯两端的作用力失去平衡,阀芯遂向左移动。高压油从S流向C2，送到负载。负载回油通过C1流过回油口，进入油箱。阀芯的位移量与力矩马达的输入电流成正比，作用在阀芯上的液压力与弹簧力相平衡，因此在平衡状态下力矩马达的差动电流与阀芯的位移成正比。如果输入的电流反向，则流量也反向。表中是伺服阀的分类。

型号列举：D072-559A-、D072-383A-HP5、S15FOFA4VBL、J761-、S63JOGA4VPL、G631-3005-、D662-、D662-4015-D02HABF6VSX2B、D691-、D691-2705D-Q60FTATCNEC2N、D630-、D633-、D633-419AR16KO1AONSP2、D791-、D791-4007S25JQS6VSX2-B、G123-、G123-815A001、D792-、D792-4006-S40JOQS6VSX2-B、D661-、D661-XXX-P30HAAF6VSX2-B、D662-4005-D01HABF6VSX2、B97007、B97067、 H19G761/3003、H19G-、D634-、D634-319CR40K02MONSP2、J761-003S63JOGA4VPL、J761-001、J072-、J761-004S63JOGB4VPL、D662Z4341K、D661-4506C、D664-、 D664Z4306K、D663Z4305K、E062-、D662-、M040-、G2L20G422-615、G3L15G423-416、G3L25G423-612、D634-、D634-521P40KA2M0NSM2、G122-、D-、NE122-、E128-、B-、G040-、G040-125-001、G123-、G123-815A001、G631-、G631-3006D、D635-、 D635Z681EP16XX1AORSS2M、D691Z2086GQ80XUAAAVVS2N、D631-335CF-4、D631、 N122-001、D791Z106AS16JPNAFU680

气比例阀、伺服阀的工作原理

典型电---气比例阀、伺服阀的工作原理电---气比例阀和伺服阀按其功能可分为压力式和流量式两种。压力式比例/伺服阀将输给的电信号线性地转换为气体压力；流量式比例/伺服阀将输给的电信号转换为气体流量。由于气体的可压缩性，使气缸或气马达等执行元件的运动速度不仅取决于气体流量。还取决于执行元件的负载大小。因此精确地控制气体流量往往是不必要的。单纯的压力式或流量式比例/伺服阀应用不多，往往是压力和流量结合在一起应用更为广泛。电---气比例阀和伺服阀主要由电---机械转换器和气动放大器组成。但随着近年来廉价的电子集成电路和各种检测器件的大量出现，在1电---气比例/伺服阀中越来越多地采用了电反馈方法，这也大大提高了比例/伺服阀的性能。电---气比例/伺服阀可采用的反馈控制方式，阀内就增加了位移或压力检测器件，有的还集成有控制放大器。一、滑阀式电---气方向比例阀流量式四通或五通比例控制阀可以控制气动执行元件在两个方向上的运动速度，这类阀也称方向比例阀。图示即为这类阀的结构原理图。它由直流比例电磁铁1、阀芯2、阀套3、阀体4、位移传感器5和控制放大器6等赞成。位移传感器采用电感式原理，它的作用是将比例电磁铁的衔铁位移线性地转换为电压信号输出。控制放大器的主要作用是： 1）将位移传感器的输出信号进行放大； 2）比较指令信号Ue和位移反馈信号U f U； 3）放大，转换为电流信号I输出。此外，为了改善比例阀的性能，控制放大器还含有对反馈信号 Uf的处理环节。比如状态反馈控制和PID调节等。带位置反馈的滑阀式方向比例阀，其工作原理是：在初始状态，控制放大器的指令信号UF=0，阀芯处于零位，此时气源口P与A、B两端输出口同时被切断，A、B两口与排气口也切断，无流量输出；同时位移传Uf=0。若阀芯受到某种干扰而偏离调定的零位时，位移传感器将输出一定的电压Uf，控制放放大后输出给电流比例电磁铁，电磁铁产生的推力迫使阀芯回到零位。若指令Ue>0，则电压差增大，使控制放大器的输出电流增大，比例电磁铁的输出推力也增大，推动阀芯右移。而阀芯的右移又引起反馈电压Uf的增大，直至Uf与指令电压Ue基本相等，阀芯达到力平衡。此时。

穆格伺服阀外委维修技术协议

穆格伺服阀外委维修技术协议甲方：日照钢铁控股集团有限公司（以下简称甲方）乙方：(以下简称乙方）甲乙双方就甲方伺服阀维修的技术质量细节，经协商达成如下协议：一、甲方委托乙方维修甲方穆格伺服阀 15 件。二、甲方向乙方提供如下实物。

三、伺服阀需修复主要内容： 1、拆解前外观检测、清洗及初步测试。 2、无尘实验室彻底拆解、清洗。 3、微观尺度下阀芯、阀套的探伤及初步研磨。 4、集成放大板、力矩线圈、位移传感器等电器部分的检测。 5、更换所有密封件、控制油滤芯后组装上综合实验台测试。 6、伺服阀各项特征性能符合样本要求后进行零位调定并锁紧。 7、调零结束进行跑合实验并出具检测报告。 8、根据初步检测报告确定修复或更换放大板、位移传感器、驱动线圈、阀芯、阀套等元件。四、伺服阀检查、判定、处理方式及要求：乙方需提供返修伺服阀的检测报告及维修方案，经甲方确认后再组织修复。五、质量要求： 1、在正常的产品公差下，阀在零区（额定输入电流的±5％）的流量增益范围在正常流量增益的50～200％。 2、额定流量公差：±10％（N P ?=3.5MPa/每一节流边） 3、响应时间：<5％ 4、滞环：伺服阀<0.3％ 5、最小分辨率：伺服阀<0.05％ 6、零漂：温度：100°F （56°C ）范围内<1％(T ?=55K 情况下) 7、零位泄漏量（零遮盖）：<3.8L/min 8、主阀芯位移：<±1％ 9、供油压力：1000psi 范围的变化（70bar ）<±2％六、验收： 1、检验方法：外观检查、上线检测使用；

2、验收标准：满足现场使用要求、伺服阀响应反馈与现场所用伺服阀相同 3、保质期限：维修后的伺服阀上线使用1年内，若更换的部件出现质量问题，乙方必须无偿为甲方提供免费维修和检测服务。 4、将每个伺服阀的检测曲线图随伺服阀一起返回甲方。 5、将更换的阀芯阀套随伺服阀一起返回甲方。 6、附合格品证明文件及测试报告。七、违约条款： 1、若甲方检查发现伺服维修不满足技术协议要求，厂家需免费维修。 2、若返修伺服阀仍无法满足现场使用要求，乙方需免费重新修理以达现场使用要求。八、其他： 1、本协议经由甲乙双方签字盖章后生效，并与承揽合同具有同等法律效力； 2、伺服阀维修的往返运输由乙方负责，维修期限：初步检测后30天内返回甲方现场； 3、未尽事宜，双方协商解决，超出本技术协议范围的，双方可另行签订技术协议； 4、本协议一式2份，甲乙双方各持1份。甲方：日照钢铁控股集团有限公司乙方：签字（代表）：签字（代表）：日期：年月日日期：年月日

伺服阀样本

Australia Melbourne Austria Vienna Brazil S?o Paulo China Shanghai Denmark Birker?d England Tewkesbury Finland Espoo France Rungis Germany B?blingen Hong Kong Kwai Chung India Bangalore Ireland Ringaskiddy Italy Malnate Japan Hiratsuka Korea Kwangju Philippines Baguio Russia Pavlovo Singapore Singapore Spain Orio Sweden G?teborg USA East Aurora (NY) B A M /W A /2000 P r i n t e d i n G e r m a n y D691 EN / Rev1 / 09.97 MOOG Controls Limited Ashchurch Tewkesbury Gloucestershire GL20 8NA Telephone (01684) 29 66 00Telefax (01684) 29 67 60 MOOG GmbH Hanns-Klemm-Stra?e 28D - 71034 B?blingen Postfach 1670 D - 71006 B?blingen Telefon (07031) 622-0Telefax (07031) 622-191

11 D691 Series Ordering information Model-Number Type designation Preferred configurations are highlighted.All combinations may not be available.SV*=Solenoid valve VE**=Valve electronics Options may increase price. Technical changes are reserved.

摩根伺服阀样本1

78 Series Installation and Operation Instruction Electrohydraulic Servovalve Upper Polepiece Flexure T ube Flapper Lower Polepiece Feedback Wire Inlet Orifice Magnet Coil Armature Nozzle Spool Figure 1 Moog Series 78 Control Port B Return Control Port A Pressure Filter

3.HYDRAULIC SYSTEM PREPARATION T o prolong servovalve operational life and to reduce hydraulic system maintenance,it is recommended that the hydraulic fluid be kept at a cleanliness level of ISO DIS 4406 Code 16/13 maximum,14/11 recommended.The most effective filtration scheme incorporates the use of a kidney loop or “off-line”filtration as one of the major filtration components.The filter for the “off-line”filtration scheme should be a ?3≥75 filter for maximum effectiveness. Upon system startup and prior to mounting the servovalve,the entire hydraulic system should be purged of built-in contaminating particles by an adequate flushing.The servovalve should be replaced by a flushing manifold and the hydraulic circuit powered up under conditions of fluid temperature and fluid velocity reasonably simulating normal operating conditions.New system filters are installed during the flushing process whenever the pressure drop across the filter element becomes excessive.The flushing processes should turn over the fluid in the reservoir between fifty to one hundred times. T o maintain a clean hydraulic system,the filters must be replaced on a periodic basis.It is best to monitor the pressure drop across the filter assembly and replace the filter element when the pressure drop becomes excessive.In addition to other filters that are installed in the hydraulic circuit,it is recommended that a large capacity,low pressure ?3≥75 filter be installed in the return line.This filter will increase the interval between filter element replacements and greatly reduce the system contamination level. 4.INSTALLATION The Moog 78 Series Industrial Servovalve may be mounted in any position, provided the servovalve pressure,piston and return ports match respective manifold ports. The mounting pattern and port location of the servovalve is shown on Figure 4.The servovalve should be mounted with 5/16-18 x 3 inch long socket head cap screws.Apply a light film of oil to the screw threads and torque to 120 inch-pounds (150 inch-pounds on 4000 psi versions). Wire mating connector for desired coil configuration and polarity.Thread connector to valve. 5.MECHANICAL NULL ADJUSTMENT It is often desirable to adjust the flow null of a servovalve independent of other system parameters.The “mechanical null adjustment” on the Moog 78 Series servovalve allows at least ±20% adjustment of flow null.The “mechanical null adjustor” is an eccentric bushing retainer pin located above the port designation on the valve body (see Figure 2) which,when rotated,provides control of the bushing position.Mechanical feedback elements position the spool relative to the valve body for a given input signal.Therefore,a movement of the bushing relative to the body changes the flow null.Adjustment Procedure https://www.wendangku.net/doc/9b6021792.html,ing a 3/32inch Allen wrench,rotate mechanical null adjustor pin to obtain desired flow null.If excessive torque (more than 12 in.-lb.) is required to rotate null adjustor pin,perform Step 2. Note: Clockwise rotation of null adjustor pin produces open loop flow from port B to port A. https://www.wendangku.net/doc/9b6021792.html,ing a 3/8inch offset box wrench,loosen self-locking fitting.DO NOT remove self-locking fitting.Insert a 3/32inch Allen wrench in null adjustor https://www.wendangku.net/doc/9b6021792.html,ing the 3/8inch offset box wrench,tighten self-locking fitting until a torque of 10 to 12 in.-lb.is required to rotate null adjustor pin with the Allen wrench.Perform Step 1 to establish desired flow null. T ools and Equipment a.Blade screwdriver b.Allen wrench set (3/32,5/32,1/4,3/16) c.No.2-56 NC by 11/2inch screw d.T orque wrenches e.3/8 inch offset box wrench f.T weezers 6.GENERAL SERVICING RECOMMENDATIONS a.Disconnect electrical lead to servovalve. b.Relieve hydraulic system of residual pressure. c. Remove servovalve.

MOOG伺服阀J761-原理……MOOG办事处

MOOG伺服阀J761-003原理……MOOG办事处美国穆格MOOGJ761-003，J761-003系列直动式伺服阀型号：D633，D634系列生产厂家：MOOG 产品说明：高性能直动式伺服阀，由线性力马达直接驱动阀芯运，阀内带有电子放大器对阀芯位置进行闭环控制。直动式设计避免了先导级的泄漏损失，且动态响应与系统工作压力无关。安装底面符合ISO4401标准。频率响应：70HZ阶跃响应：15ms流量控制：3.8－100l/min(1-26gpm)最大工作压力：31.5Mpa该阀适应于金属压制设备，例如剪板机，折弯机，弯管机,木材压机.另外我司优势提供意大利atos阿托斯全系列！备有常规阀现货期待您的来电咨询！！！ MOOG伺服阀J761-003原理……MOOG办事处 MOOG伺服阀J761-003原理……MOOG办事处格公司（MOOG）是全球电液伺服元件及伺服系统设计及制造领域的领导者，由电液伺服阀的发明者William C. Moog 于1951年创立。产品广泛应用于飞机、卫星、航天飞机、火箭以及各种工业自动化设备。在工业领域，注塑设备及吹塑设备的伺服控制是我们的重要研究领域之一。 MOOG 是最早进入全电动注塑行业的专业控制厂商之一，向合作伙伴提供DBS、DBM、DS2000 系列驱动器FASTACT 系列电机。DS2000 驱动器和 FAS T 交流伺服电机具有以下一些特点：

驱动器可接受三相，50HZ，65到506V间的任意电压；可设定控制交流伺服电机或异步电机；电流环可根据伺服电机特点配置，并按DC BUS 变化自动调节，同时提供 B.E.M.F 补偿以及相位自校正功能；速度环内集成了三种数字滤波器，动态性能良好，等等 MOOG伺服阀原理J761-003&MOOG办事处 MOOG伺服阀J761-003 现货供应！常用系列：D634系列,J761系列,G761系列, D791系列；D792系列, D661系列；D662系列；D663系列；D664系列；D665系列；D633系列等 MOOG品牌最早起源于航空航天军事工业领域伺服阀及系统制造，主要经营伺服阀,伺服控制器,电动缸,伺服电机,伺服控制软件,行业应用领域广泛,涉及钢铁冶金,电力电站系统,注塑吹塑成型,材料试验,汽车测试仿真系统,航空测试仿真系统等， MOOG伺服阀J761-003/J761-004稳定可靠全部采用进口低飘移、高稳定度的运算放大器，使控制系统能长期、可靠、稳定地工作。灵活方便系统所需要调整的调零、输入增益反馈增益、放大增益、电流选择开关均设在仪器面板上。线路独特独特的功放电路设计，可适合各种电液伺服阀，并带有过流自动保护电路。电流输出直观采用数显电流表，流过阀线圈的电流明确，精度达到±0.1mA。维修方便 MOOG伺服阀放大器J761-001/J761-003 J761-004

MOOG伺服阀说明书1

Servovalves with integrated Electronics D791 and D792 Series

Q [l/min]=max. flow D p [bar]=valve pressure drop with Q A K [cm 2 ]=spool drive area p X [bar]=pilot pressure The pilot pressure p X has to be at least 15 bar above the return pressure of the pilot stage. D791 and D792 Series Three stage servovalves Principle of operation An electrical command signal (set point, input signal) is applied to the integrated control amplifier which drives a current through the pilot valve coils. The pilot valve produces differential pressure in its control ports. This pressure difference results in a pilot flow which causes main spool dis-placement. The position transducer which is excited via an oscillator measures the position of the main spool (actual value, position voltage). This signal then is demodulated and fed back to the control amplifier where it is compared with the command signal. The control amplifier drives the pilot valve until the error between command signal and feedback signal is zero. Thus, the position of the main spool is proportional to the electrical command signal. Q Q p p N N =??p 2,510Q A p X -2K ≥?? ?The actual flow depends on the electrical command signal and the valve pressure drop, and may be calculated using the square root function for a sharp-edged orifice. The flow value Q calculated in this way should not exceed an average flow velocity of 30 m/s in ports P, A, B and T. Q [l/min]=calculated flow Q N [l/min]=rated flow D p [bar]=actual valve pressure drop D p N [bar]=rated valve pressure drop 2 If large flow rates with high valve pressure drops are required, an appropriate higher pilot pressure has to be chosen to overcome the flow forces. An approximate value can be calculated as follows: Our quality management system is certified in accordance with DIN EN ISO 9001. This catalogue is for users with technical knowledge. To ensure that all necessary characteristics for function and safety of the system are given, the user has to check the suitability of the products described here. In case of doubt please contact MOOG. The flow control servovalves D791and D792 Series are throttle valves for 3-way and preferably 4-way applications. These three stage servovalves have been especially developed for such demanding applications where high flow rates and at the same time extreme dynamic performance require-ments must be met. The design of these valves is based on the well known D079 Series. The inte-grated electronics has been replaced by a new design applying SMD technology. The valves are offered with pilot valves of D761or D765 Series, optional standard response or high response versions are available. Series D791 can de-liver rated flow up to 250 l/min,Series D792 is available with rated flow up to 1000 l/min. These valves are suitable for pres-sure or force control, position and velocity control systems with high dynamic response requirements.