Pressure regulating system and method for working machine

Abstract

The invention provides a pressure regulating system for a working machine, comprising an oil tank in response to operation of a control valve, an actuating mechanism which does actuating actions, a first pressure regulating valve and a second pressure regulating valve, wherein fluid flows through the first pressure regulating valve and is output to the actuating mechanism from the oil tank, the second regulating valve and the first pressure regulating valve are connected by the fluid, and pressure buffer is carried out on the fluid which flows to the second pressure regulating valve, thus enabling the pressure of the fluid which is output to the actuating mechanism to be increased stably. The invention also provides a pressure regulating method for the working machine, comprising the following steps: a part of the fluid which flows through the first pressure regulating valve from the oil tank is output to the actuating mechanism of the working machine; a part of the fluid which flows through the first pressure regulating valve is output to the second pressure regulating valve which is connected with the first pressure regulating valve by the fluid, wherein pressure buffer is carried out on the fluid which flows to the second pressure regulating valve, thus enabling the pressure of the fluid which is output to the actuating mechanism to be increased stably and avoiding pressure shock.

Description

technical field [0001] The invention relates to a pressure regulating system, in particular to a pressure regulating system of a working machine, and further relates to a pressure regulating method of the working machine. Background technique [0002] Actuating mechanisms of working machines, such as steering mechanisms and transmissions, usually have hydraulic systems associated therewith to achieve various controls and operations. For example, the hydraulic system of the transmission not only provides working hydraulic pressure with different pressures to the shift actuators such as clutches and brakes, but also provides hydraulic oil to the torque converter and controls the engagement and disengagement of the lock-up clutch, and controls the rotating parts inside the transmission. Lubricate and cool. In the working process of the transmission, the hydraulic pressure required by different parts under the same working condition is different, and the hydraulic pressure requ...

AI Technical Summary

Problems solved by technology

For example, this method requires separate accumulators for each gear, that is, multiple accumulators, which increases the cost

In addition, in the specific layout, because each accumulator needs to be adjusted separately considering factors such as the length of the pipeline, the required operation becomes more complicated for the case where multiple accumulators are required to adjust the hydraulic pressure. complex

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