Valve for hydraulic damper

Abstract

The invention relates to a valve (1) to ensure pressure compensation between subchambers (21, 22) of a hydraulic damper (2), wherein the valve (1) comprises a first side (100) for connection to a first subchamber (21) and a second side (200) for connection to a second subchamber (22), the valve (1) is designed to shut off in its rest position a flow of fluid between the two sides (100, 200) and comprises, when deflected from its rest position, a passage channel with a passage cross-section for admitting the flow of fluid, the valve (1) comprises two valve elements (3, 4) guided towards each other and movable towards each other along a path of movement in a movement direction x, one of the two valve elements (3, 4) is designed as a moving element (4) and the other valve element as a seat element (3), a pressure can be applied to the moving element (4), on the load side thereof, by a fluid coming from the first side (100), generating an effective force for moving the moving element (4) in the moving direction x, and the moving element (4) is connected to a spring system (5) which applies to the moving element (4) a spring force, generating a restoring force opposite to the effective moving force. At least one of the valve elements (3, 4) comprises a cylinder section comprising a plurality of passages (6), the passage channel runs through at least some of the passages (6) and the passage cross-section is limited by a cross-section of these passages (6), while the other valve element (3, 4) comprises a closed cylindrical surface (7) which lies on the one valve element (3, 4) in the rest position, shutting off the flow of fluid, and the passage cross-section can be adjusted by the deflection of the valve (1) as a result of the movement of the moving element (4) towards the seat element (3) in the direction of movement x, the passage cross-section increasing with the deflection.

Description

technical field [0001] The invention relates to a valve according to the preamble of claim 1 for ensuring pressure equalization between two subchambers of a hydraulic shock absorber. The invention also relates to a hydraulic shock absorber. Background technique [0002] Common hydraulic shock absorbers are used to dampen impact forces, such as impacts on structural elements. Typical hydraulic shock absorbers are used, for example, to damp vibrations in structures such as bridges or high-rise buildings that may occur during earthquakes. Hydraulic shock absorbers are used for this purpose, for example, in cable shock absorbers. Typical hydraulic shock absorbers are designed to mitigate the risk that sudden impacts may separate supporting structural elements. Common hydraulic shock absorbers are thus designed to dampen such shocks. Due to the considerable forces that occur in the area of ​​application of such hydraulic shock absorbers, these have to be constructed particula...

AI Technical Summary

Problems solved by technology

[0006] However, the traditional hydraulic shock absorber has the disadvantage that when the force between the structural elements exceeds the lower limit, the valve will suddenly open, which may cause severe displacement of the structural elements

Furthermore, conventional hydraulic shock absorbers are only suitable for absorbing the forces between the structural elements to which they are attached if these forces remain within a certain limited range

This is because if the force on the hydraulic damper is too low and the piston then cannot or has difficulty moving in its working chamber, the valve in the piston will not open and there will be no damping effect

If the hydraulic shock absorbers are subjected to very large forces, conventional hydraulic shock absorbers will not be able to achieve sufficient relative displacement of the structural elements because they cannot follow the large forces fast enough to prevent structural damage

[0007] This inherent problem with conventional hydraulic shock absorbers is due to: the design of the hydraulic shock absorber at the setting of the minimum force beyond which damping will be guaranteed and the setting of the hydraulic shock absorber in the event of very large forces being applied A compromise has been made in terms of adaptability

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