Pressure limiting type variable vane pump is a single-acting} {stator pump, the pump along a certain direction for translational motion, work, according to changes in system load by the force balance are located on both sides of the variable stator vane pump piston and spring preload principle, you can change the variable pump stator and rotor eccentricity variable displacement pump variable pump · care, thus changing the variable vane pump flow. Steady flow pump system {} double acting vane pump: the completion of each revolution of the rotor suction, each secondary drain. Double acting and single acting vane pump vane pump compared to the variable displacement pump, the basic balance of radial hydraulic force suffered its flow uniformity variable pump · telephone service, the rotor body. Double acting vane pump is generally quantitative outflow, played the role of steady flow. Questioner on the evaluation study, O (∩_∩) O Xiexiemada initial displacement of the maximum displacement, when the working pressure is lower than the set pressure of the valve 7, the valve 7 can not afford control action, the displacement of the motor with X The pilot pressure at port change infinitely variable between maximum and minimum, in order to achieve the pilot pressure control. When the motor A, B provide any work port pressure oil, the pressure oil can enter the small chamber 5 of the variable cylinder through the check valve. X port pilot control pressure increases, the pilot oil pressure acting on the valve a force to overcome the spring force regulator spring 2 and 3, to promote a move to the right valve, when the pilot pressure rises to the motor when starting variables When the pressure, the valve will be in a neutral position. If the pilot pressure continues to rise, the servo valve will be further to the right, one in the left position servo valve function, motor working pressure oil through a valve into the variable cylinder 5 and 7 large cavity. Due to the variable area of ??the piston 6 is not equal at both ends, when both ends are subject to refinement variable pressure oil pump · role, variable piston moves to the left, fixed variable piston lever will drive the oil pan and cylinder swing is reduced so that the angle between the cylinder and the spindle, so that the motor displacement is reduced. When X port control pressure is reduced, the motor control process with the above process is reversed, not repeat them here. In summary, when the pilot pressure to terminate the pressure change in the variable between the initial pressure and variable displacement motor will change accordingly between the maximum and minimum. · Telephone service variable pump, variable pump, hydraulic from Jinan Jing Jing Chong Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) strong, credible, in Jinan, Shandong mining machinery industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement to create innovative ideas will lead crystal hydraulic and you hand into the brilliant, for a better future!