Each plunger revolution discharged oil and it is taking the trip related to the larger amount of oil discharged from the larger stroke piston pump v38, while the plunger stroke depends on the angle of the swash plate, when the swash plate angle A the greater the greater the stroke of the plunger pump the greater the amount of oil discharged. So changing the swash plate angle can change the pump displacement. Variable pump swash plate angle is controlled by the servo piston, the servo piston moves to the left, move to promote the swash plate to the left when the big end of the servo piston oil pressure, so that the angle A smaller variable pump, smaller displacement stroke becomes smaller. Control of critical control servo piston pump displacement becomes, currently there are many factors to control it, such as system pressure, back to the oil pressure valve and electronic control devices. 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, if the required pressure is exactly equal to the maximum pressure of the pump can output a variable vane pump, that the system pressure is set equal to the pump pressure balance, set the maximum output pressure of the pump if the pressure is less than required nor is invariant, there is a certain variable, but not all of the variables. If the pressure is greater than the desired maximum output pressure of the pump, the pump also reaches the maximum set pressure, maintaining this pressure in cooperation with the other system components, and will not be damaged. The above, you might look out of the hydraulic variable pump leak, variable pump is not only the highest and lowest output setting, but the linear variable output, at different pressures transform different output displacement. Variable vane pump | variable displacement pump | Jing Jing Chong Chong hydraulic preferred by Jinan 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!