The structural form of the piston pump

Piston pump is divided into two representative structural forms of axial piston pump and radial piston pump; because the radial piston pump belongs to a new type of high-efficiency pump with relatively high technical content, with the continuous acceleration of localization, the radial piston pump will inevitably become an important part of the piston pump application field; the radial piston pump is a piston pump with the reciprocating motion direction of the piston or plunger perpendicular to the drive shaft. The working principle of the radial piston pump: the driving torque is transmitted by the drive shaft to the star-shaped hydraulic cylinder rotor through the cross coupling, and the stator is not subject to other transverse forces. The rotor is mounted on the distribution shaft. The radially arranged plunger in the rotor is pressed against the eccentric stroke stator by means of a hydrostatically balanced sliding shoe. The plunger is hinged to the sliding shoe ball and locked by a circlip. Two retaining rings snap the shoe onto the stroke stator. When the pump rotates, it relies on centrifugal force and hydraulic pressure to press on the fixed inner surface. When the rotor rotates, the plunger will reciprocate due to the fixed eccentricity, and its stroke is twice the fixed eccentricity. The eccentricity of the stator can be adjusted by two plungers on the pump body that are radially opposite each other. The inflow and exit of the oil passes through the flow channel on the pump body and distribution shaft, and is controlled by the suction port on the distribution shaft, and the hydraulic pressure generated in the pump body is absorbed by the hydrostatic equilibrium surface. The static pressure balance of the friction pair adopts the over-equilibrium pressure compensation method to form an open-loop control. The bearing that supports the drive shaft only plays a supporting role and is not affected by other external forces. Hydraulic system: The axial piston pump is used to work by using the volume change caused by the reciprocating motion of the plunger parallel to the transmission shaft in the plunger hole. Since the plunger and plunger hole of the piston pump are round parts, high precision fit can be achieved during machining;