(57) Abstract:Usage: in servo systems of machines, machine tools, robots. Essence: in the electrohydraulic amplifier including an external magnetic circuit with the field winding, covering the fixed pole with stepped shunt variable cross-section, concentric annular ledges facing axially movable anchor, sliding inside the ferromagnetic tube and associated axle with a movable steering element, a stationary pole is made with two ledges and ledge, placed in the center, made in the form of a cone whose height is less than the height of another ledge, made with a cylindrical internal bore and installed to form between the ledges of the ring groove of trapezoidal cross-section. 1 Il. The invention is intended for use in systems electrohydrostatic as analog electrohydraulically and can be used in servo systems of machines, machine tools, robots.Known solenoid DC, including the external magnetic circuit, the excitation winding, covering the fixed pole with shunt variable cross-section and the ferromagnetic tube, inside which u is echanism (Japan patent N 55-7930, CL H 01 F 7/16, F 16 K 31/02 1980).The disadvantage of this solenoid is in a limited range of linear movement of the armature and its associated actuator due to a sharp increase in tractive force when approaching the anchor to a stationary pole. To correct the distortion of the traction curve is used non-magnetic spacer (washer), limiting the working stroke of the armature, and therefore, narrowing the range of application of the known device.The closest to the technical nature of the present device is an electrohydraulic switching device containing placed in the enclosure - external magnetic field winding covering the fixed pole with stepped shunt facing the axially movable armature with the response speed of the ring shunts appropriate length and a smaller diameter located inside the ferromagnetic tube and the associated axis with the movable element of the hydraulic system.The disadvantage is that the traction characteristics of the Electromechanical transducer is not horizontal, and pulsating. This is because the generalized traction curve is essentially ogiba is passed annular projections of the armature and the stationary pole. And these projections are essentially shunts constant cross section, which is characterized by a sharp increase traction at the beginning of the stroke of the armature and a sharp reduction efforts in the mid-stroke of the armature. In addition, the closer the anchor to stop increasing the mechanical conductivity between elementary steps, which causes the switching valve of the hydraulic system with shock. Thus, violated the horizontal characteristics and at the end of the anchor. Following the disadvantage inherent in the known device, is the inability of the proportional control valve of the hydraulic system. As mentioned above, the traction characteristic of a device can be represented as a set of fragments of the initial sections of the traction curves, caused by the interaction of elementary tubes of constant cross-section. And if it is, then more or less horizontal characteristic of the known device will match only a specific value of magnetizing force (property shunts constant cross section to change the shape of the tractive force when changing magnetizing force, unlike shunts variable cross-section). This means the inability of the proportional control valve pie is expanding the scope and functionality due to the possibility analog (proportional) control spool of the hydraulic system.The technical result is achieved by the fact that the electrohydraulic amplifier containing placed in the enclosure - external magnetic field winding covering the fixed pole with stepped shunt variable cross-section, concentric annular ledges facing axially movable anchor located inside the ferromagnetic tube and the associated axis with the movable element of the hydraulic system provides the following design features: fixed pole is made with two ledges and ledge placed in the center made in the form of a cone whose height is less than the height of another ledge, made with a cylindrical internal bore and installed to form between the ledges of the ring groove of trapezoidal cross-section.When carrying out the invention the excitation winding is contained in enclosure - external magnetic circuit, comprises a fixed pole with two pieces of variable cross-section, and the ledge, placed in the center, made in the form of a cone whose height is less than the height of another ledge, made with a cylindrical internal bore and installed to form between the ledges ring grooves trapetseidalnym axis with the movable element of the hydraulic system. On the axis of the anchor is non-magnetic spacer to eliminate the small residual magnetization.This design of the proposed solution allows us to formulate the horizontal traction characteristics in a wide range of the stroke and to implement proportional control of the hydraulic system, which expands the scope and functionality of known solutions.The drawing shows the proposed amplifier.Electrohydraulic amplifier contains an external magnetic circuit 1, the field winding 2, covering the fixed pole 3 with two concentric annular ledges. The Central ledge 10 is made in the form of a cone whose height is less than the other ledge 4, made with a cylindrical internal bore and installed to form between the ledges of the ring groove 9 of trapezoidal cross-section. Anchor with a non-magnetic spacer 14 is installed on the axles 11, 12, moving in the non-magnetic bearings 7 and 8 and is located inside the ferromagnetic tube 5. The axis 12 of the armature affects the balanced springs 15 movable steering element 16. Non-magnetic cover 13 serves as a support axis 11 of the anchor.Electro-hydraulic power osti, limited external annular ledge 4. When this annular ledge 4 of variable cross-section is heavily saturated as the radial magnetic flux and flow of buckling anchor 6 on the outer conical surface and the inner cylindrical surface of the ledge 4. As a result, the ledge 4 acquires properties regulator constant effort, and hence the traction characteristics at the beginning of the stroke of the armature is horizontal. The influence of the Central conical ledge 10 at the beginning of the stroke of the armature is small for two reasons. First, due to the large lengths of secondary power lines likely flow paths between the anchor and the ledge 10. And, secondly, due to the small volumes formed by the rotation of plane figures likely flow path around the axis of symmetry of the poles. Closer to the anchor ledge 10 increases the conductivity between the planar end face of the armature 6 and mainly truncated-conical surface of the ledge 10. , resulting in a ledge 10 is saturated and limits the sharp increase traction armature in attracted position. Therefore, electro-hydraulic amplifier does not lose control when approaching the anchor to the ledge 10 and the traction characteristic is horizontal throughout the range of lane is getting horizontal features at the end of the anchor. When moving the armature toward the stationary pole 3 is offset from the axis 12 counterbalanced by the springs 15 of the rolling element of the hydraulic system 16, which is increasing the flow of the working fluid.Thus, the proposed device is a linear Converter of the control current to the flow of the working fluid.Return the armature to its original position when the current reduction control is due to the return springs 15 16 steering.The proposed design of electrohydraulic amplifier in comparison with the prototype allows to extend the scope and functionality due to the fact that the fixed pole is made from two pieces, a Central conical ledge which is less than the height of another ledge, made with a cylindrical internal bore and installed to form between the ledges of the ring groove of trapezoidal cross-section. (56) USSR Author's certificate N 1451358, CL F 16 B 13/044, 1986. ELECTROHYDRAULIC AMPLIFIER containing placed in an external magnetic field winding covering the fixed pole with stepped shunt variable cross-section, concentric annular lips of the y axis with the movable element of the hydraulic system, characterized in that the pole is made with two ledges and ledge, placed in the center, made in the form of a cone whose height is less than the height of another ledge, made with a cylindrical internal bore and installed to form between the ledges of the ring groove of trapezoidal cross-section.
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
FIELD: fluid-pressure actuators.
SUBSTANCE: booster comprises source of fluid connected with the slide valve distributing device through the first and second lines for supplying fluid provided with throttles. The fluid source is also connected with the differential nozzles. The booster receives C-shaped magnetostrictive actuator with gates secured to its ends and cooperating with differential nozzles through the fluid and control unit connected with the antiphase control windings mounted on the working sections of the C-shaped magnetostrictive actuator.
EFFECT: enhanced precision and expanded functional capabilities.
FIELD: fluid-pressure actuators.
SUBSTANCE: method comprises mounting the electromechanical converter in the housing and adjusting the rate of operation by means of moving nozzles with respect to the gate of the electromechanical converter.
EFFECT: enhanced precision of operation rate adjustment and reduced leakage.
FIELD: technology for controlling hydraulic executing devices of technological equipment.
SUBSTANCE: amplifier is meant for controlling hydraulic executing devices in technological equipment. Amplifier contains a working liquid source, two constant throttles, differential magnetostriction executive drive, four control windings, two controllable nozzles, electronic control block, executive element, two lines for feeding working liquid and control signal.
EFFECT: increased precision and reliability of transformation.