The dispenser is designed to control the flow of fluid in the hydraulic systems of aircraft. The dispenser includes a housing located in the housing allocation element to control the flow of the working fluid, and a piezoceramic actuator, one end of which is fixed in the housing, and the other set, with the ability to move in the housing, the piston associated with the distribution item through the multiplier. The multiplier is made in the form of a curved elastic plate, one end of which is mounted for engagement with the piston, the other with an emphasis in the housing, and the middle part is connected with the junction element, the curved elastic plate provided with a rigidly connected with its ends by transverse plates secured in the housing. The technical result is increased reliability. 1 Il.The invention relates to the field of hydraulic drive and can be used, for example, in hydraulic systems of aircraft. From the patent literature known electro-hydraulic valve, comprising a housing located in the housing allocation element to control the flow of the working fluid is made th fixed in the housing, and the other is installed between the nozzles with the possibility of overlap as a flap .The drawbacks of such a dispenser is that it is overly low power, given the small force developed bimorph plate that does not allow you to use it in highly dynamic hydraulic drives.From the patent literature known and electro-hydraulic valve, comprising a housing located in the housing allocation element to control the flow of the working fluid, and a piezoceramic actuator, one end of which is fixed in the housing, and on the other set, with the ability to move in the housing, the piston associated with the distribution item through the multiplier (2). In this dispenser, the multiplier is made hydraulic, which eliminates the stability of the connection of the piezoceramic actuator with control element due to the inevitable leakage of the working fluid multiplier. In addition, the movement of the piston, mounted on a piezoceramic actuator is not more than tens of microns, and therefore the hydraulic multiplier, which should provide a displacement distribution of the element in units of millimeters, has considerable dimensions. That the valves blast tube and a flat slide valve.The technical problem of the invention is to enhance reliability electrohydraulic distributor, simplified design and reduced dimensions.The solution of a technical problem is provided by the fact that the electrohydraulic valve, comprising a housing located in the housing allocation element to control the flow of the working fluid, and a piezoceramic actuator, one end of which is fixed in the housing, and the other is mounted for movement in the housing, the piston associated with the distribution item through the multiplier, the latter is in the form of a curved elastic plate, one end of which is mounted for engagement with the piston, the other with an emphasis in the housing, and the middle part is connected with the junction element, moreover, the curved elastic plate provided with a rigidly connected with its ends by transverse plates secured in the housing.The drawing shows a structural diagram of an electrohydraulic valve.Electrohydraulic valve includes a housing 1 located in the housing 1 distribution element 2 to control the flow of the working fluid and peremesheniya in the housing 1, the piston 6, associated with the distribution element 2 through the multiplier 7, made in the form of a curved elastic plate 8, one end 9 of which is mounted for cooperation with the piston 6, another 10 - prop 11 in the housing 1 and the middle portion 12 is associated with a distribution item 2.Curved elastic plate 8 provided with a rigidly connected with its ends 9, 10 of the transverse plates 13, 14, fixed in the housing 1.In the design shown in the drawing, the distributor element 2 made in the form of oppositely arranged nozzles 15, 16, and a curved elastic plate 8 is installed between the nozzles 15, 16 with the possibility of overlap as a damper. Nozzles 15, 16 are connected directly with the end command cavities 17, 18 formed with the housing 1 of the valve 19, and the pressure hydroline 20 through the inductors 21, 22. The valve 19 has a feedback sensor 23. Electrohydraulic valve operates as follows. When applying voltage to the piezoelectric actuator 3 is an increase in its length, causing the piston 6 is moved in the housing 1, compressing the elastic plate 8 multiplier 7. Because of the small size of arrow deflection plates 8, minor, measured in tens of the Tina 8, sufficient for the function of the control flow of the working fluid. Neutral provisions of the distribution element 2 is some constant value of the voltage supplied to piezoceramics actuator 3. The control action is carried out by raising or lowering the voltage corresponding to the neutral position.The proposed control strategy in addition to device type nozzle, the valve can be used for direct displacement distribution elements, such as jet tube, a cylindrical or a flat slide valve, ball or conical normally open or closed valves.Due to the absence in the first stage electrohydraulic distributor traditional torque motor, the natural frequency of the moving system is limited by its high moment of inertia, a significant effort piezoceramic actuator high rigidity of the elastic plate, the frequency bandwidth of the distributor reaches 1000 Hz.Transverse plates 13, 14, fixed in the housing 1, eliminate the friction between the curved elastic plate and stops in the housing 1 and the piston 6, providing no wear and stability character/044 from 16.12.95,2. The Germany Application No. 3714337 C2, F 15 B 13/044.
ClaimsElectro-hydraulic valve, comprising a housing located in the housing allocation element to control the flow of the working fluid and piezoelectric actuator, one end of which is fixed in the housing, and the other is mounted for movement in the housing, the piston associated with the distribution item through the multiplier, wherein the multiplier is made in the form of a curved elastic plate, one end of which is mounted for engagement with the piston, the other with an emphasis in the housing, and the middle part is connected with the junction element, and a curved elastic plate provided with a rigidly connected with its ends by transverse plates secured in the housing.
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