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Shaft system torsional vibration control device and method of parallel type hybrid power excavator power system
The invention provides a shaft system torsional vibration control device and method of a parallel type hybrid power excavator power system. A engine and an ISG motor are coaxially connected. A rotating encoder is arranged on a connection shaft of the ISG motor and a hydraulic pump. Outlet oil ways of the hydraulic pump include the main oil way and the compensation oil way. The main oil way is directly connected with a load. The compensation oil way is sequentially connected with a check valve and an energy storage device. A two-position two-way electromagnetic valve is connected between the energy storage device and the load. The rotating encoder and the electromagnetic valve are electrically connected with a controller. When the power system works and the output pressure of the hydraulic pump is larger than the gas pressure in the energy storage device, high-pressure oil output by the hydraulic pump enters the energy storage device through the check valve whole driving the load, and the controller collects the shaft system torsional vibration amplitude value in real time; and when the shaft system torsional vibration amplitude value exceeds a set value, the electromagnetic valve is powered on through the controller, pressure oil in the energy storage device enters the main oil way through the electromagnetic valve and assists the hydraulic pump in driving the load, the shaft system torsional vibration amplitude value will be decreased, and therefore the shaft system torsional vibration control is achieved.
Shaft system torsional vibration control device and method of parallel type hybrid power excavator power system
The invention provides a shaft system torsional vibration control device and method of a parallel type hybrid power excavator power system. A engine and an ISG motor are coaxially connected. A rotating encoder is arranged on a connection shaft of the ISG motor and a hydraulic pump. Outlet oil ways of the hydraulic pump include the main oil way and the compensation oil way. The main oil way is directly connected with a load. The compensation oil way is sequentially connected with a check valve and an energy storage device. A two-position two-way electromagnetic valve is connected between the energy storage device and the load. The rotating encoder and the electromagnetic valve are electrically connected with a controller. When the power system works and the output pressure of the hydraulic pump is larger than the gas pressure in the energy storage device, high-pressure oil output by the hydraulic pump enters the energy storage device through the check valve whole driving the load, and the controller collects the shaft system torsional vibration amplitude value in real time; and when the shaft system torsional vibration amplitude value exceeds a set value, the electromagnetic valve is powered on through the controller, pressure oil in the energy storage device enters the main oil way through the electromagnetic valve and assists the hydraulic pump in driving the load, the shaft system torsional vibration amplitude value will be decreased, and therefore the shaft system torsional vibration control is achieved.
Shaft system torsional vibration control device and method of parallel type hybrid power excavator power system
HUANG ZHONGHUA (author) / XIE YA (author)
2016-02-24
Patent
Electronic Resource
English
IPC:
E02F
Baggern
,
DREDGING
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