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.
FIELD: production of hydraulic distributor for electro-hydraulic amplifiers.
SUBSTANCE: the hydraulic distributor is intended for use in electro-hydraulic amplifiers and is supplied with the drive of a sliding valve made in the form of a turning electrical motor, on the shaft of which there is a cantilever eccentric with a ball bearing. On the sliding valve there is a groove for interaction with the bearing and the shaft sealed with a reinforced sealing ring.
EFFECT: the invention ensures increased efficiency of the hydraulic distributor operation.
2 cl, 4 dwg
FIELD: fluid-pressure actuators.
SUBSTANCE: system of hydraulic valves comprises first actuating connection and the second actuating connection which are connected with the hydraulic consumer, system of supplying connections that has the connection with the pressure source and connection with the vessel, first valve system that disconnect the system from the pressure source or controllably connect it with the first actuating connection or the second actuating connection, second system of valves that disconnects the system from the vessel or connects it controllably with the first actuating connection or the second actuating connection, and control unit that controls the first valve system and second valve system. At least one valve system is provided with the pickup of the extent of opening connected with the control unit that controls the valve system depending on the signal from the pickup of the extent of opening and reference signal.
EFFECT: enhanced precision of control.
15 cl, 3 dwg
SUBSTANCE: device comprises sleeve with step outer side and axial passage that receives two cylindrical collars of the step slide valve whose third collar is provided with face stop. The outer side of the smaller diameter of the sleeve is provided with the first and second grooves interconnected through the axial passage. The outer surface of greater diameter of the sleeve has two chamferings whose surfaces are connected with the axial passage through openings. The first collar is arranged near the face of the slide valve opposite to the stop to define a control chamber, is provided with two flat chamferings, and is made for permitting cooperation with the ports of the first groove in the sleeve. The second collar is separated from the third collar by a groove and is made for permitting cooperation with radial openings of the sleeve. The first groove is open from its face, and the ports of the second groove are connected with the space defined in the axial passage between the collars of the slide valve.
EFFECT: enhanced efficiency.
6 cl, 10 dwg
FIELD: engines and pumps.
SUBSTANCE: method and device are intended for control system operated by gaseous working medium. The method consists in the following. With the switched off electromagnetic drive windings, the armature is set at its travel centre, and, during drive operation, electromagnetic forces are induced on the armature each side in turn. Here, air being distributed is forced to blast the electromagnetic drive stator and windings to create equal in size and opposite-sign forces acting on the armature along its travel. The distributor is made up of two concentrically located cylinders jointed by a connector in their central zone. Coils with windings are arranged between cylinders on both sides of the connector with a gap for air to pass through. The smaller diameter cylinder accommodates a cylinder rod making a dual-action armature with blind holes on its every end to accommodate the springs resting against the covers, thus retaining the rods with an equal clearance relative to covers. The cylinders walls have two rows of inclined holes symmetric relative to the connector jointing the cylinders.
EFFECT: lower electric power consumption.
2 cl, 1 dwg
FIELD: engines and pumps.
SUBSTANCE: valve has a body with the feed pressure supply channel, an outlet channel, a controlled pressure outlet channel and an inner boring accommodating a control valve with an inner channel with throttle communicating the inlet channel with the left-hand space formed by the body boring and the left-hand end face of the said control valve and communicating with the outlet channel via the control valve, and a channel communicating the outlet channel with the right-hand space formed by the body boring and the control valve right-hand end face and containing a return spring acting on the slide valve. The slide valve incorporates an additional spring-loaded channel communicating the right-hand space with the outlet channel, while the channel communicating the outlet channel with the right-hand space accommodates an additional throttle. In compliance with the other valve version, the right-hand space can communicate via the spring-loaded valve with the outlet channel. Here the additional spring-loaded valve is arranged inside the slide valve or in the main valve body.
EFFECT: smooth engagement of gearbox friction gear wheels.
4 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: invention relates to hydro pneumatic automatic control devices and can be used in aircraft hydraulic control systems. The proposed valve incorporates a body with the pressure, control and drain channels separated by two cups arranged in the valve body and provided with aligned grooves and holes. A push rod is arranged in the said grooves to move therein. The aforesaid holes in the cups are made on both sides of the push rod to contact, by their outer edges, with the ball-like shut-off members. One of the said balls, on the drain side, interacts with a spring-loaded rod moving inside the electromagnetic drive stator. Note that in one position of the aforesaid rod, the control channel communicates with the drain line while, in the other position, it communicates with the pressure channel. There is a spring-loaded plunger fitted in the valve body of the pressure side, its end face interacting with the shut-off member on the aforesaid side. Cylindrical collars are made on the outer surface of every cup on the side of holes and aligned with them. One of the said collar accommodates on the drain side a sleeve locked in a blind groove aligned with the sleeve through hole receiving a ball. The collar of other cup, but on the pressure side, accommodates a similar sleeve with the ball.
EFFECT: higher valve tightness.
FIELD: machine building.
SUBSTANCE: distributor is designed for supply and withdrawal of fluid into cavity of hydraulic engine and for protecting it from overloads, for locking cavity and for maintaining suspended load, for replacing load from cavity of hydraulic engine and damping to facilitate uniform motion at any specified speed. The distributor consists of a rectangular metal case of platen mounting with bypass, supply and drain lines, of a safety valve with a pilot, of a controlled valve with a pilot and two back valves each including a bush-seat, a ball and a spring. Also a safety valve is installed into the end of the case along its lengthwise axis; the valve is equipped with two control valves and the pilot. The control valve with the pilot is installed perpendicular to lengthwise axis of the case. Notably, under-valve cavity of the safety valve is connected with a side surface of the gate of the control valve and the drain line via a channel; the supply line is connected to the under valve cavity of the control valve; the drain line is connected with the side surface of the safety valve, while the back valves are installed in withdrawal channels of drain and supply lines; the back valves shut off the channels pressure tight from overflows of fluid from one line to another.
EFFECT: facilitating multi-functionality of device, simplicity of fabrication, high maintainability, easy control and high reliability.
FIELD: machine building.
SUBSTANCE: in amplifier there is implemented jet amplifier stage with two pressure nozzles and correspondingly with two receiving channels connected by means of their hydraulic lines with sub-end cavities of slide. The jet amplifier stage consists of two cylinder elements coaxially and with a gap installed in a case. A deflector gate of an electro-mechanic converter is arranged in slots in the cylinder elements from the side of ends facing each other. The pressure nozzle and the receiving channel are coaxially arranged in the slot of each element from the side of cylinder surface. Threaded sleeves are screwed on threaded ends of the cylinder elements from the side opposite to the slot. With their external thread the sleeves are screwed into the case. Also thread in the case, on the cylinder elements and correspondingly in the threaded sleeves has different pitch.
EFFECT: improved processability of fabrication, simplification of jet amplifier design and facilitation of its adjustment with high accuracy.
FIELD: machine building.
SUBSTANCE: two-position hydraulic distributor with pulse control refers to hydraulics and can be used as hydraulic equipment of mobile machines. A valve of the hydro-distributor slides along a guide block and is fixed in two points, when control pulse electric signal is transmitted to electro-magnetic valve.
EFFECT: reduced dimensions and weight of electric magnet, reduced power consumption, increased reliability of hydraulic distributor operation.
FIELD: engines and pumps.
SUBSTANCE: flow control and control method of the control is intended for hydraulic system of working machine. Control includes housing with inlet hole and outlet hole, main bypass valve located inside the housing between inlet and outlet holes and including the forward end and hollow end. Valve has the possibility of being moved between open position in which the liquid flows from inlet hole to outlet hole, and closed position in which the liquid flow between inlet and outlet holes is locked. In addition, control has auxiliary valve having the possibility of being moved so that they can selectively attach hollow end of the main bypass valve to the drain, thus influencing the movement of the main bypass valve between open and closed positions. Besides, flow control includes solenoid mechanism intended to move auxiliary valve. Position of auxiliary valve depends on liquid pressure in inlet hole.
EFFECT: higher reliability of hydraulic system.
10 cl, 3 dwg
FIELD: high-accuracy control apparatuses.
SUBSTANCE: hydraulic actuator includes electromechanical converter with damper in outlet shaft; housing with inlet ducts; two casings coaxially mounted in threaded openings at both sides of damper with possibility of axial motion of nozzle and having axial ducts hydraulically communicated through radial passages with supply ducts of housing. End of each nozzle opposite relative to damper extends outside housing and it is provided with member for controlling position of nozzle relative to damper and fixing member. End of each nozzle is also provided with two lids. Each lid has opening providing access to member for controlling position of nozzle relative to damper. Each fixing member is arranged on respective lid. End of each nozzle opposite to damper is provided with shoulder. Unit for forcing nozzle to housing is arranged between shoulder and lid. Nozzles are provided with members for compensating displacement value at forcing them.
EFFECT: enhanced accuracy of controlling process.
2 cl, 3 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to hydraulic control drives of tractors, load-lifting and road-building machines and automobiles. In proposed hydraulic servo containing case with pressure and drain spaces, controlled mechanism, piston with drain channel, control element with rod is made in form of valve whose spring-loaded shutoff member is installed in rod bore communicating with pressure space. Rod is coupled with piston for limited relative axial displacement owing to space made in piston end face and enclosing part of rod. Pin is radially secured in side wall of space. Free end of pin gets for displacement into closed longitudinal slot made on side surface of rod. Tubular stop of valve shutoff member is installed in piston drain channel. Stop is enclosed by compression spring installed between end face of rod and end face of piston space enclosing part of rod.
EFFECT: improved reliability in operation, simplified design.
4 cl, 1 dwg
FIELD: mechanical engineering.
SUBSTANCE: proposed booster is designed to increased pressure in presses and other mechanisms. Booster contains housing with spaces closed by covers and divided by partition. One space accommodates control piston with rod, and the other, piston with high-pressure cylinder whose space is connected with above-indicated rod. It has bushing fitted stationary by one end in piston hole made parallel to its axis and fitted by other end for longitudinal displacement in hole made in partition of housing. Radial holes made on fixed end of bushing communicate axial hole of bushing with radial channel and ring drain grooves made in piston. Longitudinal slots are made on lower end of rod intersecting with ring groove connected by channel with space accommodating piston and high-pressure cylinder.
EFFECT: reduced metal usage.
2 cl, 1 dwg
FIELD: building high and superhigh pressure within useful space.
SUBSTANCE: proposed method includes filling useful space with working medium and building up desired pressure within useful space by applying external forces; water or gas is used as working medium and jack, as means for applying external forces. Pressure booster has cylinder with inlet and outlet holes and piston; in addition, it has jack, cooling jacket, base, and adjusting studs; jack is mounted under piston; cylinder is double-stage structure whose upper stage is of greater diameter than lower one; it is rigidly fixed to base by means of adjusting studs; piston is installed in cylinder in a spaced relation to cylinder upper stage enclosed by cooling jacket.
EFFECT: enhanced output pressure.
2 cl, 2 dwg