The invention relates to the technical field of shock absorbers, in particular to an active control serpentine shock absorber, a vibration damping system and a vehicle. When a piston of the active control serpentine shock absorber reciprocates in a hydraulic cylinder, the interior of the hydraulic cylinder is divided into two cylinder bodies, and the two cylinder bodies respectively communicate with an oil storage tank through two main oil paths to form a main loop between the hydraulic cylinder and the oil storage tank; and a reversing valve is arranged between the two main oil paths and theoil storage tank and used for changing the flow direction of the main loop when the shock absorber is in an active mode and adjusting the displacement of the piston in the hydraulic cylinder. When theshock absorber is switched to the active mode, the displacement of the piston is changed through the oil pressure difference between the two cylinder bodies in the hydraulic cylinder, so that the problem that the performance parameters of traditional serpentine shock absorbers cannot be adjusted and consequently a bogie is in a radial position relative to the vehicle body when the vehicle runs ina curve in the prior art is solved, the curve passing speed of the train is increased, the wheel rail abrasion is reduced, and the service life of the vehicle is prolonged.

Active control serpentine shock absorber, vibration damping system and vehicle

The invention discloses a self-adjusting hydraulic vibration isolation system between HVAC machines The system comprises hydraulic cylinders, a hydraulic system and a control system The first pipeline of the hydraulic system is sequentially connected with a hydraulic oil tank, an oil filter, a hydraulic pump, a hydraulic control one-way valve and an energy accumulator, and at least four hydraulic cylinders are communicated with the first pipeline between the hydraulic control one-way valve and the energy accumulator One end of the second pipeline is communicated with an overflow valve, theother end of the second pipeline is communicated with the first pipeline between the hydraulic pump and the hydraulic control one-way valve, the first two-position two-way valve is communicated with the overflow valve through a third pipeline, and the valve banks which comprise the overflow valve and the second two-position two-way valve and are arranged in parallel are communicated with a remotecontrol port of the overflow valve through the fourth pipeline A sensor arranged on the hydraulic cylinders transmits vibration frequency and displacement data between the HVAC machines to a PLC, andthe PLC controls the two-position two-way valve to adjust the pressure of the hydraulic system according to the transmitted data The system does not need manual timing adjustment

Self-adjusting hydraulic vibration isolation system between HVAC machines

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 discloses a car with a traveling energy storage function The car comprises a transmission shaft, a car-mounted controller, a hydraulic fuel tank, a hydraulic shock absorber, a transmission device, a fuel inlet one-way valve, a fuel outlet one-way valve, an energy storage a hydraulic motor, a clutch device, a first shift switch, a two-position three-way electromagnetic reversing valve and an overflow valve A rodless cavity of the hydraulic shock absorber is connected with the hydraulic fuel tank through the fuel inlet one-way valve and connected with the two-position three-way electromagnetic reversing valve through the fuel outlet one-way valve The two-position three-way electromagnetic reversing valve is connected with the energy storage and the hydraulic motor, and the hydraulic motor is connected with the hydraulic fuel tank The energy storage is connected with the hydraulic fuel tank through the overflow valve, and an output shaft of the hydraulic motor is connected with an input shaft of the clutch device An output shaft of the clutch device is connected with the transmission shaft through the transmission device The car has the beneficial effects that energy recovery and reutilization can be achieved only through simple transformation by utilizing existing car-mounted parts, and fuel economy is improved

Car with traveling energy storage function

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 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.

Single-action reciprocating hydraulic actuator

The invention discloses a hydraulic servo buffer capable of achieving active control. The hydraulic servo buffer is characterized in that a low-pressure energy accumulator with a switch valve is connected with a hydraulic constant delivery pump with a motor, the hydraulic constant delivery pump is connected with an inlet of a one-way valve, an outlet of the one-way valve is connected with an oil inlet of a hydraulic servo valve with a hydraulic servo amplifier, an oil return port of the hydraulic servo valve is connected with an oil outlet of the low-pressure energy accumulator, two ports of an oil outlet of the hydraulic servo valve are connected with two oil inlets of a hydraulic lock, oil outlets of the hydraulic lock are connected with a rodless cavity and a rod cavity of a hydraulic cylinder respectively, and a pressure sensor is arranged on a pipeline which enables the hydraulic lock and the rodless cavity to be connected; and a displacement sensor is arranged on a piston rod inthe hydraulic cylinder, the outer end of the piston rod of the hydraulic cylinder is hinged to a sliding block through a spherical hinge, and the sliding block is arranged on a guide rail corresponding to the sliding block. According to the hydraulic servo buffer capable of achieving active control, the responding speed and the control precision are high, specified loads are applied to a system, and then the requirements of some high-grade, precision and advanced special occasions on load reducing are achieved.

Hydraulic servo buffer capable of achieving active control

Provided is an extra-large-load hydraulic buffer. An oil inlet of a constant displacement pump is connected with an oil tank, an oil outlet is connected with an oil inlet of a one-way valve A, an oiloutlet of the one-way valve A is connected with oil inlets of two-position two-way magnetic directional valves B and C, oil outlets of two energy accumulators A and B, an oil outlet of a one-way valveB and an oil inlet of a safety valve, the two-position two-way magnetic directional valve C is connected with a rod cavity of a hydraulic cylinder, three pipes are parallelly connected to the two-position two-way magnetic directional valve B, one pipe is connected with an oil inlet of a two-position two-way magnetic directional valve A, an oil outlet of the two-position two-way magnetic directional valve A is also connected with the oil tank, the other pipe is connected with an oil inlet of the one-way valve B, the third pipe is connected with a rodless cavity of the hydraulic cylinder, the outer end of a piston rod of the hydraulic cylinder is hinged to a sliding block through a spherical hinge, and the sliding block is arranged on a guide rail corresponding to the sliding block. In addition, a pressure sensor and a displacement sensor are also arranged on the hydraulic cylinder. The extra-large-load hydraulic buffer has the advantages of being high in response speed, high in precision, strong in buffer capability, simple in hydraulic system structure and the like.

Zhao Jingyi

Papers

Single-action reciprocating hydraulic actuator

Hydraulic servo buffer capable of achieving active control

Extra-large-load hydraulic buffer