Hydraulic pump to provide pressurized fluid to a hydraulic device for hydraulic transmission, is a pump. Its function is to power machine (such as a motor and an internal combustion engine, etc.) of the mechanical energy into pressure energy of the liquid. Output flow can be adjusted as needed is called variable displacement pump (hydraulic pump domestic) maintenance, the flow rate can not be adjusted is called a metering pump. Hydraulic systems commonly used in pump gear pumps, vane pumps and piston pumps three kinds. The maximum speed of the hydraulic motor speed is mainly affected by the use of life and mechanical efficiency limits, after the speed increase, deputy movements increased wear life lower (pump domestic) maintenance, high speed hydraulic motor will need to enter the flow is large, Therefore, the flow rate of each flow part of the corresponding increase in the pressure loss also increases, so that the mechanical efficiency. (Pump domestic) proxy _ crystal create a hydraulic (certified) _ Jinan crystal by creating a hydraulic pump 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 to create a hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal to create a better future for the hydraulic.