Back to oil process Plunger up oil, the variable displacement pump, when the plunger up to the chute (stop supply side) and the back hole on the sleeve connected, the pump oil chamber low pressure oil will be with the plunger head the hole and radial holes and chutes communication, a sudden drop in oil pressure, the valve quickly closed to stop the oil under the action of the spring force. Thereafter the plunger but also upstream, when the raised portion of the cam turn in the past, under the action of the spring, repair variable pump plunger and down. At this time began the next cycle. Variable pump biggest problem is heat, mainly working system design is to find ways to reduce the fever. Convenience variable pump operation, you can reduce emissions in accordance with operating conditions, thereby reducing engine power, reduce heat quantitative advantage is the price of motor cheap, variable pump accessories, because the work of a wide range of motor, can adapt to changes in the flow, so that the system simply furnished, the motor speed needs to be adjusted, the direct change pump displacement, gradually approaching the desired speed. particularly large systems ( TBM), the motor also needs the variable, because the load of rapid change. speed control requires accurate, then only control motor .. motor feedback signal to the pump, motor pump with variable. to further improve the system, reduce heat maintenance variable displacement pump, hydraulic creating crystal factory direct (certification), the variable pump from Jinan Jing Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) Shandong Jinan, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In the crystal creating hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal creating hydraulic better future.