Bidirectional self-adaptive damping valve

Abstract

The invention discloses a bidirectional self-adaptive damping valve which comprises a valve body, a valve core, a first valve base and a second valve base, wherein the valve core comprises a connecting body, a first valve core and a second valve core; the first valve core comprises a first half valve core, a first sliding piston and a first sensitive spring; the right end of the first half valve core is fixedly connected with the connecting body; the first half valve core is internally provided with a cavity; the left end of the first half valve core is axially provided with a first shaft hole; the first sliding piston is arranged in the cavity, one end of the first sliding piston passes through the first shaft hole at the left end of the first half valve core, and the other end of the first sliding piston is provided with a shaft shoulder for axially positioning; the first sensitive spring is arranged in the cavity, and is positioned between the first sliding piston and the connecting body. According to the invention, through the matched use of the valve core and the spring, the throttling and damping degree of the damping valve changes along with the pressure change at any end of the valve body, and the valve core is at the dynamic balanced state constantly; and through the setting of pre-compression amount of the spring, the pressure sensitivity of the damping valve within different ranges is realized, and the damping valve can adapt to the load pressure changes of all working conditions.

Description

technical field [0001] The invention relates to a damping valve, in particular to a bidirectional self-adaptive damping valve. Background technique [0002] In the variable pump hydraulic system, the load pressure is fed back to the variable mechanism of the hydraulic pump through the LS port of the proportional valve, and the variable pump changes the displacement to make the displacement of the pump adapt to the flow required by the actuator. The periodic movement of the actuator (such as the hydraulic motor rotating at a certain angular velocity) is affected by periodic resistance (such as frictional resistance), resulting in periodically fluctuating LS feedback pressure. Since the LS port of the proportional valve is directly connected to the variable mechanism of the variable pump through the hydraulic pipeline, the variable mechanism of the hydraulic pump operates periodically, which in turn causes the output flow and pressure of the hydraulic pump to pulsate violently...

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a two-way self-adaptive damping valve, which realizes two-stage shock absorption and two-way damping difference, to solve the problem of dynamic instability of the pump control hydraulic system and to protect the internal components of the variable pump, and can be applied to any pressure feedback control in the loop

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