Taiyuan University of Technology

Xiangyu Wang

Long Quan

Bo Wang

Lei Ge

Zepeng Li

He Liu

Lianpeng Xia

Weinan Huang

Tao Liang

The present disclosure belongs to the technical field of hydraulic control, and relates to a velocity and position compound control system for a pump-valve dual-source driven hydraulic cylinder used in engineering machinery. The system includes a first power source, a first hydraulic pump, a second power source, a second hydraulic pump, a safety valve, a proportional directional valve, a pilot operated check valve, a single-rod hydraulic cylinder, a handle, a tank, a rotating speed sensor, a first pressure sensor, a second pressure sensor, a third pressure sensor, a temperature sensor, a position transmitting unit, magnetic induction marks, a count correction module, an integrator module, a calculation control module, a signal acquisition module, a data storage module, a cloud memory, a communication protocol module, a fault diagnosis module, and a process monitoring module.

Velocity and position compound control system for pump-valve dual-source driven hydraulic cylinder

The present invention provides an engineering machinery hydraulic system with compensation differential pressure controllable, uses an electronic pressure compensating valve to solve the problem of flow mismatch under conditions of pressure over-limit and flow saturation, and realizes proportional shunt control and high-precision flow distribution of the system. The engineering machinery hydraulic system disclosed in the present invention has the advantages of low energy consumption, fast response speed, and high flow control precision.

Engineering machinery hydraulic system

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Taiyuan, China

Xiangyu Wang