When the spring is compressed to its thrust is greater than the static friction starts to move. Once the body begins to move (pump) agents, resistance suddenly decreases, sudden acceleration and movement of objects, the result also allows to reduce the (pump) the maintenance of telephone spring compression, thrust decreases, the inertia of objects rely on forward journey After the stop, until the mobile compression spring and the spring, the thrust increases, and movement of objects on again until the hydraulic motor, the speed increases, the back pressure is also limited. E.g., crankshaft connecting rod type hydraulic motor, when the speed is increased (the hydraulic pump) maintenance, oil return back pressure must be significantly increased in order to ensure that the surface of the crankshaft connecting rod will not hit the hydraulic pump, thereby avoiding the collision phenomenon. As the speed increases, the required return value back pressure oil chamber should also be increased. But excessive increase back pressure of the hydraulic motor efficiency will drop significantly. In order to make the efficiency of the motor is not too low, the motor speed should not be too high. (Pump) sales, hydraulic pumps, hydraulic pressure 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!