Flow distribution control method, device, and apparatus for hydraulic system and hydraulic system

Abstract

A flow distribution control method for a hydraulic system, the hydraulic system comprising N loops L-LN. The flow distribution control method comprises the following steps: Scomparing pressures P-PN at an inlet of an actuator in each loop of the hydraulic system; Saccording to the comparison result, determining a loop Lpwhich requires flow compensation; and Sconducting flow compensation on the loop Lpaccording to the theoretical flow of the loop Lpand an actual flow in the loop Lpwhich flows into the actuator, wherein the number of loops in the loop Lpis less than or equal to N. Also disclosed are a flow distribution control device and a flow distribution control apparatus for the hydraulic system, the hydraulic system and a non-transitory computer-readable medium. An electric control pressure pump and a flow supplementing valve are employed to replace a constant pressure difference valve, and the flow of all branches may be supplemented, thereby avoiding the phenomenon of unequal flow distribution being generated due to flow distribution characteristics of a pressure compensation system being affected by the overflow area of the constant pressure difference valve. The foregoing employs a flow compensation scheme, has a simple structure, is insensitive to pollution, and has low investment costs.