Reduce the pollution level of the hydraulic system, system failure was significantly reduced maintenance (variable pump), motion stability greatly improved refinement (variable pump), hydraulic oil to extend the use of time than conventional systems over three years. Variable pump system has good adaptability, pressure and flow of its output is consistent with the load demand can solve the traffic throttling speed control system suited to adapt and pressure problems, greatly reducing energy consumption, system efficiency variable pumps, energy-saving effect is very obvious, and general quantitative pump + PQ proportional valve system compared, it can save 25 to 45 percent. Variable stator vane pump surface is a circular room, the rotor and stator has eccentricity, the oil pan is only open a window and a suction pressure of the oil window. When the rotor rotates in the direction of the arrow driven by the electric motor, the stator vane through the lower half, under the action of centrifugal force, extending from the blade groove, sealed volume between the two blades is increased, to achieve suction; by a stator blade When the upper half, was gradually pressed into the surface of the stator blade slots Training (variable pump), sealed volume reduction and achieve oil pressure. Pump rotor every turn, each sealed volume suction, pressure oil each time. Changing the amount of eccentricity between the stator and rotor, you can change the pump displacement, so called variable vane pump [2]. Training (variable pump), crystal create hydraulic (certified), 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 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.