Stops limiting fluid passage, e.g. hydraulic stops (F16F9/49)

Hydraulic damper // 2628552
FIELD: machine engineering.SUBSTANCE: hydraulic damper (10) contains the piston valve (22) fixed at the end of the piston rod (11), the base valve (27), the tank chamber (15). The base valve includes the compression side channel (31). The first coil spring (28) is provided between the first valve (24) and the base valve, and the second coil spring (23) is provided between the first valve and the piston valve. The compression side channel is closed by the first valve near the maximum compression state, reducing the oil flow rate, entering the tank chamber. The second valve (33), passing through the first valve centers and the base valve, regulates the oil flow rate, entering the tank chamber (15), when the pressure is equal to or exceeds the specified level of the pressure in the oil chamber (21b). In the second embodiment, the third valve is provided on the lower part of the first valve.EFFECT: damping force characteristic change.3 cl, 30 dwg

Shock absorber // 2570243
FIELD: machine building.SUBSTANCE: shock absorber contains a cylinder with work fluid. The piston is inserted in the cylinder and separates the cylinder to two chambers. The piston rod is connected with the piston. The damping valve is installed in the first channel. The through section regulation mechanism is installed in the piston and regulates the through section of the second channel based on the piston rod position. The damping force decreases for tension and increases for compression in the set rod position at large extension. The damping force increases for tension and decreases for compression in the set rod position at small extension. In the shock absorber under the second option the damping force decreases for tension and compression in set rod position at small extension. In the shock absorber under the third option the damping force decreases for tension and compression in set rod position at large extension. The damping force increases for tension and decreases for compression in the set rod position at small extension. The shock absorber under the 4th option is installed between the wheel and body of the vehicle. Mechanism regulating the vehicle height is installed in parallel with the shock absorber.EFFECT: extension of dampening characteristics.16 cl, 25 dwg

Hydraulic telescopic shock absorber // 2494295
FIELD: machine building.SUBSTANCE: shock absorber includes a housing, a cylinder, a stock, a piston-valve, a sleeve-governor, a rod with tracks, which is telescopically installed in the stock, a bottom valve, and a guide of the stock. Tracks on the rod are screw-shaped and have constant or variable angle of twist to the stock axis. When moving on the rod track, the guide stop turns the sleeve-governor; at that, holes in the stock are covered, thus changing the quantity of bypassed liquid. As per the first version, in the shock absorber the rod end is fixed in the bottom valve zone against being turned and against axial movement. As per the second version, in the shock absorber the rod end is fixed in the bottom valve zone against axial movement. Shock absorber includes an additional valve with channels adjoining the bottom valve holes. When moving on the rod track, the guide stop that is additionally made on the stock turns the rod; at that, holes in the additional valve are covered, thus changing the quantity of bypassed liquid.EFFECT: obtaining automatic adjustment of a shock absorber force depending on a stock position, as well as providing the possibility of readjustment of the shock absorber without its removal.2 cl, 3 dwg

Oscillation damping method and device for its implementation (versions) // 2482347
FIELD: machine building.SUBSTANCE: inclination angle of relationship between resistance force modulus and deflection speed modulus of an elastic member is changed if current resistance force modulus differs from the specified value. The specified value of resistance force is changed depending on current deflection of the elastic member. The specified current value of resistance force is set so that it is directly proportional to modulus of current deflection of elasticity force, which is corrected to resistance force vector, of the elastic member of its static value. The device for implementing the method represents a hydraulic telescopic damper, in which the resistance force, the modulus of which depends on the modulus of deflection variation speed, is created during the suspension deflection variation. As per the first version, the damper includes a bar fixed at the compression chamber bottom. The bar has a four-sided variable cross-section in the working section of its length. At the damper compression, the bar is retracted into inner cavity of the stock. As per the second version, the damper includes two bars, as well as a compensating chamber that is separated from the compression chamber with a partition wall and partially filled with liquid. The bars are made in the form of a rotation body and installed inside the first and the second guide elements respectively with possibility of longitudinal movement.EFFECT: preventing resonance, and minimising the resultant force acting on the under-spring mass of the transport vehicle.17 cl, 10 dwg

System for damping vertical vibrations of railway passenger car body // 2470201
FIELD: transport.SUBSTANCE: invention relates to railway transport. The system contains vertical hydraulic dampers installed under body. Each damper is made as piston pump with discharge and free-flow intercommunicating via throttle chambers for working fluid. The throttle is equipped with rod of variable cross-section with thrusts for end positions. Throttle rod movement drive is made as return spring and solenoid. Solenoid core is connected with throttle rod. Solenoid coils are attached to output terminals of control unit. Input terminals of control unit are connected with electric power source and oscillation frequency sensors installed on body in the area of each damper location. Control unit provides automatic change of end positions of throttle rod by solenoid electric power switching on or off according to indications of corresponding sensors of body vibration frequency.EFFECT: design simplification and improvement of car movement smoothness.3 cl, 1 dwg

Damper // 2408804
FIELD: machine building.SUBSTANCE: damper consists of cylinder chamber filled with fluid, of piston installed inside cylinder chamber, of rod connected to piston and of accumulator. The accumulator facilitates generation of damping force produced by the piston rod due to fluid flow from the side of compression in the cylinder chamber. One coil of spiral damping groove is formed on internal periphery of the cylinder chamber within the ranges of piston stroke. Width of the damping groove is constant along its whole length. Depth of the damping groove is gradually diminishes along the spiral in the direction whereto the piston rod is pushed out. The length of the piston along axial line is less, than pitch of the damping groove.EFFECT: simplified design and more efficient control of damping force of damper.6 cl, 7 dwg
 
2551257.
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