SU1416773A1 - Hydraulic-friction vibration damper - Google Patents

Abstract

The invention relates to mechanical engineering and, in particular, to devices for damping oscillations of rolling stock of railway transport. The aim of the invention is to increase reliability by limiting the maximum loads perceived by the rod. When the forces on the rod 2, not exceeding the total friction force between the friction lining 7 and the friction element 8, the oscillation damping occurs through the valve system. At forces exceeding this friction force, damping occurs due to friction forces between the friction linings 7 and the friction element 8, while the spring 14 returns the piston 3 to its initial middle position. Z il.

Description

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The invention relates to mechanical engineering, in particular, to devices for damping oscillations of rolling stock of railway transport.

The aim of the invention is to increase reliability by limiting the maximum loads perceived by the rod.

FIG. 1 shows a hydraulic friction damper, longitudinal section; in fig. 2 shows section A-A in FIG. one.

Balancing upwardly, the return spring 14 is deformed. The elastic force of the deformed spring 14 contributes to the casing returning to its original middle position, since the forces on the damper rod may not be enough to return the casing 6 when the damper moves down under the action of the elastic forces of the compressed spring suspension springs (not shown) due to the fact that part

The hydrofricking damper, which oscillates, has already been dissipated in the damping, and contains the medium filled with the working medium during the damping upwards. This eliminates the displacement of the piston 3 relative to the middle of the cylinder 1 and the blows of it against the bottom

cylinder 1, mounted therein a rod 2 with a piston 3. In the latter and the lower part of cylinder 1, operating valves 4 and 5 of the valve system are installed, respectively. Co -..., - j .. „

The jack 6 is hingedly fastened with the brush 2, and the bracket 10 downwardly covers the cylinder 1 and has fixed static equilibrium; no additional restoring force is required, since the return of the housing 6 occurs under the latter.

When casing 6 slides 25

thirty

on the outer surface of the friction linings 7, covered by the friction element 8 to interact with it. Mounted on an object, for example, frame 9, the crown is 20 force on the rod 2, while the grip 10, in which the friction is placed and does not exceed the sum of the forces, the third element 8 and pressing its spring 11 covers the casing 6. the spring 11 is set by a nut 12. A return spring 14 is mounted between the stop 13 fixed on the frame 9 and the casing b. The return friction damper works as follows.

When compressed or when stretching the damper, the working fluid is throttled appropriately through the throttle bores of valve 4 or 5, creating a force of inelastic resistance to the displacement of the damper parts, which is proportional to the speed of the relative displacements of these parts. As long as the inelastic resistance force transmitted through rod 2 to the casing b does not exceed the total frictional force between the friction-friction damper,

7 lining and friction elements containing the working medium

Volume 8, the damper works as a hydraulic-cylinder, mounted in it by a rod with a piston damper. If this force is superior, the valve system and frictional friction force between the friction elements, characterized in that, in order to increase reliability, it is equipped with a casing attached to the outer surface of the cylinder, friction lining fixed to its outer surface,

em disturbing forces from the path. McNee between the friction linings 7 and the friction element 8 and the elastic force of the return spring 14 when compressing the damper and the sum of friction forces between the friction linings 7 and the friction element 8 when stretching the damper. If you know the material of the plates 7 and the element 8 and, therefore, the coefficient of friction between them, you can set the required frictional force between the plates 7 and the element 8 with sufficient accuracy using the nut 12. By setting the required stiffness of the return spring 14, you can limit the maximum force on the rod 2.

Claims (1)

Invention Formula with the lining 7 and the friction element 8, these lining, respectively, the casing b and the bracket 10, on which they are fixed, slide relative to each other in the corresponding direction. When the casing b slides relative to the bracket 10 from a position by static friction elements for interoperating with it, an emphasis for fixing on the object and a return spring installed between it and the casing. Balancing upwardly, the return spring 14 is deformed. The elastic force of the deformed spring 14 contributes to the casing returning to its original middle position, since the forces on the damper rod may not be enough to return the casing 6 when the damper moves down under the action of the elastic forces of the compressed spring suspension springs (not shown) due to the fact that part .... .., - j .. „ Arm 10 downward from the position of static equilibrium does not require additional restoring force, since the casing 6 is returned under the last one. When the casing 6 is slipping, the relative force on the rod 2 in this case is limited and does not exceed the sum of the forces required em disturbing forces from the path. Poppy the maximum force on the rod 2 in this case is limited and does not exceed the sum of the forces of the three Hydraulic friction damper, neither between the friction linings 7 and the friction element 8 and the elastic forces of the return spring 14 when compressing the quencher and the sum of friction forces between the friction linings 7 and the friction element 8 when stretching the quencher. If you know the material of the plates 7 and the element 8 and, therefore, the coefficient of friction between them, you can set the required frictional force between the plates 7 and the element 8 with sufficient accuracy using the nut 12. By setting the required stiffness of the return spring 14, you can limit the maximum force on the rod 2. Invention Formula 45 friction elements for interaction with it, with an emphasis for fixing on the object and the return spring installed between it and the casing. . i1 12 fae.2 b 1