Variable piston pumps for single-acting vane pumps, radial or axial piston pump gear pump and double acting vane pump for dosing pumps are generally complex variable pump, high price;. Variable piston pump outlet pressure by feedback swash plate angle control mechanism to control the variable stroke piston pump was finishing, to achieve the purpose of flow control; variable vane pump outlet pressure feedback mechanism controlled by the eccentricity of the eccentric ring to achieve the purpose of flow control; that is, variable column When the swash plate vertical plug flow is zero, vane pump empathy. Each piston root out the drain plug in acting when the pressure increased, the drain acting position just in the bottom of the plunger to the bottom every time the drain at the top of the hemisphere will be forced out, so hemisphere action. Increased pressure, the higher the inclination angle of the top will be outwardly hemispherical, hemispherical smaller, oil flow will be smaller, it can be said, high flow rate and pressure are reduced simultaneously. When the oil encountered load, is exactly equal to the desired pressure pump if the maximum pressure that can be output, and that the system pressure is equal to the set pressure pump. Equilibrium, if the pressure is less than the maximum output of the pump pressure required, nor is it not variable, there is a certain variable, but not all of the variables. If the pressure is greater than the maximum pump output pressure variable pump specializing required, the pump will reach the maximum set pressure, keeping the pressure variable pump in conjunction with other system components, repair phone will not be damaged. The above, you might look out of the variable displacement pump is not only the highest and lowest output setting, but the linear variable output, at different pressures transform different output displacement. Variable displacement pump variable pump _ _ specializing in crystal by Jinan Jing Chong Chong hydraulic 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!