Anti-vibration type direct-drive spherical overflow valve

Abstract

The invention discloses an anti-vibration type direct-drive spherical overflow valve. The overflow valve includes a valve body, a valve element and an elastic component, the valve body is provided with an inner cavity, the outer wall is provided with an oil inlet and an oil outlet, the oil inlet and the oil outlet are communicated with the inner cavity, the valve element is arranged at the position of the oil inlet of the inner cavity of the valve body, the elastic component is arranged in the inner cavity of the valve body, the elastic component elastically and partially makes contact with the valve element, when the elastic component stretches, the valve element closes the oil inlet, and when the elastic component draws back, the valve element opens the oil inlet. A shell, a valve base and a sleeve in the spherical overflow valve form multi-stage damping, the vibration and howling of the valve element is effectively inhibited, the limiting effects of a valve base limiting support and a sleeve ensure that in the strong vibration environment, the radial-direction and axial-direction displacement of the valve element is still limited near a balance point and divergent vibrating, howling and falling do not occur, the surfaces, needing to be purchased or needing high-precision machining, of key components are little, the cost is low, the pressure regulating deviation is small, the dynamic response is high, and the anti-vibration type direct-drive spherical overflow valve is low in cost and excellent in performance.

Description

technical field [0001] The invention relates to hydraulic components in the technical field of pressure control valves, in particular to an anti-vibration direct-acting spherical relief valve. Background technique [0002] The relief valve is an indispensable pressure control element in every hydraulic system. Compared with the conical relief valve, the spherical relief valve has a faster response speed and a cheaper price. However, due to the large change in the flow area, the spool The movement is less stable, and vibration and howling are more likely to occur. The traditional spherical relief valve improves the working stability of the valve core by adding a damping hole at the oil inlet port of the valve seat to suppress the cavitation phenomenon. The damping hole must be small enough to eliminate the vibration and howling of the relief valve, which will cause excessive pressure regulation deviation, and Compress the spring seat at the other end of the spool with no lim...

AI Technical Summary

Problems solved by technology

The traditional spherical relief valve improves the working stability of the valve core by adding a damping hole at the oil inlet port of the valve seat to suppress the cavitation phenomenon. The damping hole must be small enough to eliminate the vibration and howling of the relief valve, which will cause excessive pressure regulation deviation, and Compress the spring seat at the other end of the spool without limit measures

Therefore, under the action of strong vibration, the valve core has no good limit measures in the radial direction and axial direction of the valve seat, and cannot limit the valve core near the balance point, resulting in divergent vibration and howling, and the valve core is easy to fall off, causing overflow valve failure

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