Electro-hydraulic servo valve

 

(57) Abstract:

Usage: in the hydraulics. The inventive servo valve is in an electronic device 1, the Electromechanical transducer signals 2, power 3 pre-amplification stage, a distribution valve 4 of the output amplification stage and the sensor valve position 5. The anchor 12 and the coils 6, 7 with the control windings of the Electromechanical transducer signal 2 is installed with an offset from the symmetry axis X between the pole plates 10, 11, while the lower part of the coil located in the opening 14 of the lower pole plate 11. The mobile system Electromechanical transducer signal 2 is provided with an elastic suspension 15, the lower thickened end 16 with the sealing ring 17 is located in the hole 18 of the base of the Electromechanical transducer signals 2 with the stop flange 20 through the gasket 21 in the base 19. 2 Il.

The present invention relates to hydraulics and can be used in electro-hydraulic servo actuators.

Known electro-hydraulic servo valve with Electromechanical transducer signals, steering preliminary cascade usiskin the technical essence of the present invention is an electro-hydraulic servo valve, having an electronic device, the Electromechanical transducer signals, which is mounted on the bed coil with control windings, permanent magnets, the pole plate and the mobile system in the form of an anchor and the rod on elastic suspension, power steering pre-amplifier housing, a jet pipe and receiver spool dispenser of the output amplification stage and the sensor valve position.

A disadvantage of the known servo-valves is that the jet tube is combined with the output of the mechanical element of the Electromechanical transducer signals. To the upper part of the armature of the transducer is fed to hydroline power jet of amplifier. The pipeline this hydroline significantly increases the mechanical rigidity of links on the anchor, which greatly reduces the stability characteristics of the servo valve and significantly complicates the technology of its production.

Technical problem on which the invention is directed is to provide high stability characteristics of the servo valve, the improvement of the efficiency of its production.

The technical result obtained by implementation of the proposed image the device, the Electromechanical transducer signals, which is mounted on the bed coil with control windings, permanent magnets, the pole plate and the movable system in the form of an anchor and rod on elastic suspension, power steering pre-amplifier housing, a jet pipe and receiver spool dispenser of the output amplification stage and the sensor valve position, entered the armature and coils wound management, installed with an offset from the horizontal axis of symmetry between the pole plates, the feast this coil bottom part is placed in the hole of the bottom pole plate, the elastic suspension is made in the form of a thin-walled tube with flange the lower thickened end of which an elastomeric o-ring located in the bore of the base of the Electromechanical transducer signals with emphasis flange through additional seal at the base, inside elastic suspension coaxial with the last gap has the rod of the moving system, is rigidly connected to the blast tube, made with a thickened base with clamp and located in the installed sleeve with the stop collar in the end, made on poslednyuyu tube which is rigidly fixed jet nozzle located in the housing of the steering preliminary stage of amplification, allows technologically simple to implement supply hydrophane to inkjet nozzle, bypassing the Electromechanical transducer signals, to reduce the mechanical stiffness relations of the moving system of the Electromechanical transducer signals and thereby to ensure the stability characteristics of the servo valve.

In Fig.1 shows a structural diagram of an electrohydraulic servo valve of Fig.2 - section a-a in Fig.1.

Electro-hydraulic servo valve includes an electronic device 1, the Electromechanical transducer signals 2, power 3 pre-amplification stage, spool directional valve 4 of the output amplification stage and the sensor valve position 5.

The Electromechanical transducer signals has 2 coils 6, 7 with control windings, permanent magnets 8, 9, pole plates 10, 11 and a movable system in the form of anchor 12, which is rigidly fixed to the rod 13.

The anchor 12 and the coils 6, 7 with the control windings offset set and relative to the horizontal symmetry axis X between the pole plates of the I system is provided with an elastic suspension 15, which is fixed to the anchor 12 and which is made in the form of thin-walled tubes, the lower thickened end 16 with an elastomeric sealing ring 17 is located in the hole 18 of the base 19 of the Electromechanical transducer signals 2 with the stop flange 20 through the gasket 21 in the base 19.

Inside elastic suspension 15 coaxial with the last gap 22 is a rod 13. Jet nozzle 23 is installed coaxially to the receiver 24 on the jet tube 25 made with thickened base 26, provided with a collar 27. Jet tube 25 is located in the sleeve 28 with the stop collar 27 in the end face 29, is made to last. This sleeve 28 is rigidly fixed in the housing 30 of the hydraulic booster 3 pre-amplification stage, and the rod 13 is rigidly connected with jet tube 25.

Spool directional valve 4 output amplification stage consists of arranged in the housing 31 of the sleeve 32 and the cylindrical slide valve 33, formed in the sleeve 32 of the mechanical camera 34 and 35. In the end chamber 35 has a core 36 of the induction sensor valve position 5.

Hose 37 and 38 of the spool valve 4 output amplifier is in communication with the actuating mechanism (not shown) and hose 39 and 4 is edusim way.

When applying the control signal to the control winding of the coils 6, 7 anchor 12 and the rod 13 deviate from the geometrical neutral in proportion to the magnitude of the control signal. When this elastic suspension 15, which is fixed to the anchor 12, performs the role of opposing springs of the moving system of the Electromechanical transducer signals 2. The rod 13 moves the jet nozzle 23, mounted on the jet pipe 25, resulting in the end chambers 34 and 35 occurs, the differential pressure under which the valve 33 is moved up until the feedback signal generated by the position sensor valve 5 and amplified by the electronic device 1, which provides the closure of the electric circuit feedback servo valve will not return the jet nozzle 23 in the neutral position.

The location of the anchor 12 and the coils 6, 7 with the control windings offset relative to the horizontal symmetry axis X between the pole plates 10, 11 allows to obtain the maximum differential pressure in the end chambers 34, 35 spool valve 4 output stage gain at smaller displacements of the armature 12, which improves the accuracy of the testing input signal of the electrohydraulic servo valve. The AOC is anyone transducer signals while maintaining the window for winding wire, that improves the dynamic characteristics of the servo valve.

Execution elastic suspension 15 of the moving system in the form of thin-walled tubes, the lower thickened end 16 with the sealing ring 17 is located in the hole 18 of the base 19 of the Electromechanical transducer signals, allows adjustment of the servo valve by fitting the strip 21 under the flange 20 when connected gidropatii, which improves the accuracy of adjustment of the servo valve.

The implementation of the collar 27 on the bold base 26 of the jet tube 25 increases the reliability of the jet tube 25 with the jet nozzle 23 in the housing 30 of the hydraulic booster 3 pre-amplification stage and improves the manufacturability of the device.

ELECTRO-hydraulic servo valve containing an electronic device, the Electromechanical transducer signals, which is mounted on the bed coil with control windings, permanent magnets, the pole plate and the mobile system in the form of an anchor and the rod on elastic suspension, power steering pre-amplifier housing, a jet pipe and receiver, the spool valve output stage gain and the position sensor solarsentinel the symmetry axis between the pole plates, when this coil bottom part is placed in the hole of the bottom pole plate, the elastic suspension is made in the form of a thin-walled tube with a flange, the lower thickened end of which an elastomeric o-ring located in the bore of the base of the Electromechanical transducer with the stop flange through additional seal at the base, inside elastic suspension coaxial with the last gap has the rod of the moving system, is rigidly connected to the blast tube, made with a thickened base with clamp and located in the installed sleeve with the stop collar in the end, made to last, and the sleeve is rigidly fixed in the housing of the booster.

 

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