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 structure refinement variable displacement pump variable pump, high prices;. Variable piston pump outlet pressure by a feedback mechanism to control the swash plate angle, thereby controlling the variable displacement pump plunger must travel agents, 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 to say variable pump maintenance calls, variable swash plate plunger vertical flow is zero, vane pump empathy. Radial piston pump works: the drive torque transmitted to the drive shaft of the hydraulic cylinder rotor star by cross coupling, scheduled from other lateral forces. Turn on mounted with the flow axis. The rotor radial piston arranged by hydrostatic balance slipper Cheng Dingzai close to the eccentric line. Slipper piston and ball joints connected by retainer locks. Two retaining ring on the line card will Slipper 程定子. Axial piston pump is a reciprocating direction of the central axis of the piston and the cylinder parallel piston or plunger. Training variable pump | variable displacement 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!