The invention relates to a self-adjusting pressing air cylinder which comprises a cylinder body. A main air cavity and an auxiliary air cavity are formed in the cylinder body, a piston assembly and anauxiliary piston are arranged in the main air cavity and the auxiliary air cavity respectively, and a piston rod is arranged on the piston assembly. The piston assembly divides the main air cavity into an upper chamber and a lower chamber; a flow dividing hole communicated with the auxiliary air cavity is formed in the side wall of the main air cavity, and a compression spring for extruding the auxiliary piston in the direction of the flow dividing hole is arranged in the auxiliary air cavity. The air cylinder has the advantages that after an extrusion part at the end of the piston rod abutsagainst the surface of a workpiece, the piston rod is limited and cannot continue to move; at the moment, compressed air continues to be introduced into the main air cavity, enters the auxiliary air cavity through the flow dividing hole and pushes the auxiliary piston to move, the auxiliary air cavity is used for storing redundant compressed air, and the storage amount of the compressed air is changed according to the piston rod stroke caused by the workpiece size; and the compression spring extrudes the auxiliary piston in the reverse direction, and it is guaranteed that the air pressure in the main air cavity can be used to compress the workpiece.

Self-adjusting pressing air cylinder

The invention provides an integrated electric hydrostatic servo actuator for a tank gun. According to the integrated electric hydrostatic servo actuator for the tank gun, a piston rod of a linear movement unit carries out reciprocating linear movement in a chamber of a hydraulic cylinder barrel, hang rings include the upper hang ring and the lower hang ring, and a position sensor is arranged in the hydraulic cylinder barrel; a low-pressure valve block and a high-pressure valve block of a valve block unit are connected, a bypass valve is arranged on the low-pressure valve block, a high-pressurelockout ball valve is arranged on the high-pressure valve block, and a first sensing unit is installed on the low-pressure valve block; an inner chamber of an oil tank shell is divided into a gas chamber and an oil chamber by a separation piston of an oil tank unit, and a second sensing unit detects the temperature and the pressure of the oil chamber; a motor pump of a power unit is installed ina pump case, and the pump case communicates with the low-pressure valve block; and the high-pressure valve block and the hydraulic cylinder barrel are of an integrally formed structure, and the pump case and the oil tank shell are of an integrally formed structure. According to the technical scheme of the integrated electric hydrostatic servo actuator, the problem that an actuator system of a tankgun in the prior art is high in weight, large in size, low in efficiency and low in structural integration degree is solved.

Integrated electric hydrostatic servo actuator

The invention discloses a redundancy electromechanical actuator comprising an actuator body. The actuator body comprises two first motors. A planetary reducer and a first gear are fixedly installed onoutput shafts of the two first motors correspondingly. An idle wheel is meshed between the first gear and the planetary reducer. Electromagnetic type brakes are fixedly installed on the tops of the two first motors correspondingly. A same installation plate is arranged above the two first motors. A rectangular frame plate is fixedly installed at the bottom of the installation plate. The two firstmotors are both located in the rectangular frame plate. The sides, away from each other, of the two first motors make contact with arc-shaped push plates correspondingly. The redundancy electromechanical actuator is reasonable in design and convenient to operate, and the distance between the two first motors can be conveniently regulated to regulate the meshing degree of the first gear and the idle wheel and the meshing degree of the planetary reducer and the idle wheel; and by arranging first balls and second balls, friction force generated by movement of connection bases and threaded rods can be effectively reduced, use is convenient, and use requirements are met.

Redundancy electromechanical actuator

The invention discloses an electro-hydraulic actuator with a heat pipe heat radiator The electro-hydraulic actuator comprises an actuator, a hydraulic valve block, a pressurization oil tank, an oil pump, a motor, the heat pipe heat radiator and a heat dissipation piece The hydraulic valve block is fixedly arranged on the actuator The actuator communicates with the hydraulic valve block by an oil pipe The pressurization oil tank is fixedly arranged at the rear end of the hydraulic valve block The pressurization oil tank communicates with the hydraulic valve block by an oil pipe The oil pump is fixedly arranged at the left end of the hydraulic valve block The hydraulic valve block communicates with the oil pump by an oil pipe The motor is connected with the oil pump by a coupler Themotor is fixedly arranged on the hydraulic valve block The heat pipe heat radiator is fixedly arranged on the upper plane of the hydraulic valve block The electro-hydraulic actuator has the advantages of convenient application, excellent heat dissipation effect, light weight, no oil leakage, rapid response and the like

Electro-hydraulic actuator with heat pipe heat radiator

The invention discloses a single-action reciprocating hydraulic actuator. The single-action reciprocating hydraulic actuator comprises a hydraulic cylinder, an energy accumulator, a manual pump and ahydraulic power pack, wherein the hydraulic power pack is composed of a fuel tank, a motor, a gear pump, a proportional overflow valve and two one-way valves which are arranged on a hydraulic manifoldblock; the hydraulic manifold block is fixed to the upper part of the hydraulic cylinder; an oil way outlet of the hydraulic manifold block is connected to a rod cavity of the hydraulic cylinder through a pipeline; the energy accumulator is arranged at the lower part of the hydraulic cylinder in a sleeving mode and communicates with a rodless cavity of the hydraulic cylinder; the rod cavity and the rodless cavity of the hydraulic cylinder communicate with an exhaust valve; and a pressure sensor and a displacement sensor are arranged in a system. The single-action reciprocating hydraulic actuator has the advantages that when an emergency occurs and the gear pump cannot work normally, the operation can be performed through the manual pump, and therefore safe operation of the actuator can berealized; and the hydraulic system is simple, the size of the hydraulic manifold block is small, the integration degree is high, the bubble amount of the hydraulic system is small, the safety and thereliability can be achieved, and the problems that when an existing actuator achieves the functions of single-direction output and reciprocating return stroke, the structure of the hydraulic system is complex, the pipeline is complex, the bubble amount is large, and the heating value is high can be solved.

Lei Zheng

Papers

Single-action reciprocating hydraulic actuator