Dual hydraulic motor switching control system

Abstract

The invention discloses a double-hydraulic-motor switching control system. The double-hydraulic-motor switching control system is composed of a switching valve, a hydraulic oil tank, a servo pump, a main pump, a hydraulic motor A, a hydraulic motor B, an oil returning tank and an oil supplementing tank. The switching valve is a two-position seven-way valve, and comprises a valve body, a first valve element and a second valve element, a switching oil path, a driving oil path and an oil supplementing path are arranged on the valve body, and when the first valve element and the second valve element move left and right, a double-motor series working position and a double-motor parallel working position are obtained. The double-hydraulic-motor switching control system has the advantages that the two-position seven-way valve with the switching oil path, the driving oil path and the oil supplementing path is adopted, the aim that the two hydraulic motors on the same shaft are switched in a series and parallel mode is achieved, the high-rotating-speed and large-torque mutual conversion function is achieved, meanwhile, suck-out performance caused by the dynamic hydraulic motor in the series connection can be avoided, the application range of the motor series and parallel system is expanded, and the system has the advantages of being simple and compact in structure, and easy to mount and maintain.

Description

technical field [0001] The invention relates to a dual hydraulic motor switching control system, which belongs to the technical field of hydraulic motor control. Background technique [0002] At present, there are few cases where dual hydraulic motors are applied to the same actuator at the same time in China. Especially, according to the working conditions of the actuator, there is a vacancy in the application that needs to switch between high speed and high torque at any time. In addition, when switching between individual dual hydraulic motors During the state switching of the system, for example, when the dual hydraulic motors are switched from the parallel state to the series state, it is easy to cause the previous hydraulic motor to lack oil and thus suck air, and the state switching cannot be realized. Contents of the invention [0003] The purpose of the present invention is to provide a dual hydraulic motor switching control system, which can overcome the shortcom...

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Problems solved by technology

[0002] At present, there are few cases where dual hydraulic motors are applied to the same actuator at the same time in China. Especially, according to the working conditions of the actuator, there is a vacancy in the application that needs to switch between high speed and high torque at any time. In addition, when switching between individual dual hydraulic motors When the system is switching states, for example, when dual hydraulic motors are switched from a parallel state to a series state, it is easy to cause the previous hydraulic motor to be short of oil and suck air, and the state switching cannot be realized.

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