Multi-actuator heavy-duty digital hydraulic circuit based on high-pressure common rail cabin

Abstract

The invention relates to the field of fluid drive and control, and aims at providing a multi-executer heavy load digital hydraulic loop based on a high-voltage common rail cabin. The multi-executer heavy load digital hydraulic loop based on the high-voltage common rail cabin comprises an oil supply system, high-speed switch valve groups, an electronic control unit and executers, wherein the oil supply system comprises an engine, a valve flow distributing plunger pump, a high-pressure cabin, a rotation speed and rotation angle sensor, a temperature sensor, a pressure sensor, a pilot proportional overflow valve, an energy accumulator and a safety valve, and each high-speed switch valve group is arranged on an oil port of the corresponding executer, and is used for respectively controlling the connection and disconnection between the corresponding executer and the high-pressure cabin, and between the corresponding executer and an oil tank through the electronic control unit. The multi-executer heavy load digital hydraulic loop has the advantages that by combining the high-pressure common rail method and the digital hydraulic technique, the working pressure of the hydraulic system is improved, and the advantage of high power density of hydraulic drive is further developed; by using the high-speed switch valves as the unique control valves, the hydraulic system is simple, the control is easy, and the system efficiency is improved.

Description

technical field [0001] The invention relates to the field of fluid transmission and control characterized by mechanical, electrical and hydraulic control technologies, in particular to a multi-actuator heavy-duty digital hydraulic circuit based on a high-pressure common rail cabin. Background technique [0002] The existing construction machinery mostly adopts the traditional analog hydraulic system, using the pump open circuit, and one pump controls multiple actuators, and the action of the actuators is controlled by load-sensitive valves, proportional valves, etc. between the pump and the actuators. The working pressure of the system is generally between 25-35MPa, so the size of the actuator cannot be too small, so the size of the whole system cannot be too small, and the structural size of the whole machine cannot be further reduced. [0003] In construction machinery, the design of hydraulic circuits using digital hydraulic technology is still in the research stage. In 2...

AI Technical Summary

Problems solved by technology

However, when the flow capacity of the high-speed switching valve is required to be large, the response time of the switch is often slow, and the production of high-speed switching valves with high frequency response and large flow is often a problem.

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