Automatic serial-parallel motor control system

Abstract

The invention discloses an automatic serial-parallel motor control system comprising a first hydraulic control steering valve, a second hydraulic control steering valve, a first hydraulic motor and a second hydraulic motor. The automatic serial-parallel motor control system is characterized by further comprising a double-speed automatic switching valve and a shuttle valve; the double-speed automatic switching valve is connected with the shuttle valve, the first hydraulic control steering valve and the second hydraulic control steering valve; the first hydraulic control steering valve is connected with the first hydraulic motor and the second hydraulic motor; the second hydraulic control steering valve is connected with the first hydraulic motor and the second hydraulic motor; the shuttle valve is further connected with two oil openings of the automatic serial-parallel motor control system; oil liquid with high pressure of the oil openings flows into the double-speed automatic switching valve through the shuttle valve; and the double-speed automatic switching valve controls the first hydraulic control steering valve and the second hydraulic control steering valve to be automatically switched between a serial connection working state or a parallel connection working state according to the change of the pressure of the oil openings. The efficiency of the control system disclosed by the invention can be comprehensively expressed.

Description

technical field [0001] The invention relates to hydraulic transmission technology, in particular to the field of automatic control of series and parallel operation of hydraulic motors. Background technique [0002] The existing series-parallel motor control system adopts manual selection control, and selects the series or parallel operation state through manual operation. Manually select the directional valve to switch the oil circuit. When working in series, the pressure oil enters one oil port of the first motor, flows out from the other oil port, and then enters the oil inlet of the second motor; parallel operation At the same time, the pressure oil enters one oil port of the two motors at the same time, and flows out from the other oil port of each motor at the same time. [0003] Due to the need for human control during the operation process, often due to human factors, at light loads, when the series high-speed operation mode should be used, the parallel operation mod...

AI Technical Summary

Problems solved by technology

[0004] With the rapid development of ship deck machinery today, the load driven by hydraulic motors is getting larger and larger. It often happens that using a conventional displacement hydraulic motor will result in insufficient output torque, or even if a single motor with a large displacement can be used , to achieve the required output torque, but the load driven by the motor often changes greatly. When this kind of large displacement motor is under light load conditions, due to its large displacement, it requires a lot of oil. The speed will be as slow as when it is under heavy load, which cannot meet the requirements of users who want to run at high speed under light load.

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