Three-position five-way load port independent control type multi-way valve with Y-type meso-position function

Abstract

The invention discloses a three-position five-way load port independent control type multi-way valve with a Y-type meso-position function. Each section of the valve comprises a pressure compensator, two three-position five-way reversing valves, two three-way pressure reduction valves and an one-way valve, wherein elements in each section are consistent in connection relationship; and the sectionsshare an oil inlet channel P, an oil returning channel T and a load feedback oil channel LS. According to the three-position five-way load port independent control type multi-way valve with the Y-typemeso-position function, electric signals are input to the two three-way pressure reduction valves through a controller based on the working condition demands of an actuator, and the pressure reduction valves output corresponding pressure to control the opening degrees of the two reversing valves so as to achieve the purpose of controlling the speed and direction of the actuator; a load port independent control technology and a load-sensitive technology are combined to realize independent control of the oil inlet channel and the oil returning channel, so that the energy saving effect is obvious; the pressure compressors of the system are capable of compensating pressure and detecting and feeding back the pressure. Therefore, the whole multi-way valve is compact in structure, and complete in functions.

Description

Technical field [0001] The invention relates to a load port independent control multi-way valve, in particular to a three-position five-way load port independent control multi-way valve with a Y-shaped neutral function. Background technique [0002] Multi-way reversing valve is abbreviated as multi-way valve. It takes two or more reversing valves as the main body, which integrates reversing valve, overload valve, one-way valve, brake valve and oil supplement valve. Integrated valve. [0003] However, when the multi-way valve used in the load-sensing system controls the operation of the hydraulic actuator, because the oil inlet and outlet area ratio is fixed, there is only one degree of control freedom, so it can only control the pressure or pressure of one cavity of the hydraulic actuator at the same time. Flow rate, poor controllability; when the actuator is in operation, the inlet and outlet are throttled at the same time, and there is unnecessary pressure loss; especially when ...

AI Technical Summary

Problems solved by technology

[0003] However, when the multi-way valve used in the load sensing system controls the operation of the hydraulic actuator, since the ratio of the area ratio of the inlet and outlet ports is fixed, there is only one control degree of freedom, so it can only control the pressure or pressure of one cavity of the hydraulic actuator at the same time. The flow rate is poor in controllability; when the actuator is working, the inlet and outlet are throttled at the same time, and there is unnecessary pressure loss; especially in the case of exceeding the load, the system often needs to set a balance valve or a one-way throttle valve to stabilize the speed. pressure loss in the system

[0004] Each of the multi-way valves is usually equipped with a pressure compensation valve, a shuttle valve and a reversing valve to realize pressure difference compensation, resulting in redundant structure and complex control

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