A Hydraulically Compensated Radial Piston Pump with Oil Distribution on the End Face

Abstract

A hydraulic compensated radial plunger pump adopting a valve plate flow distribution comprises a pump housing; a cam is mounted in the pump housing; the two ends of a transmission shaft are supported on a pump end cover; a rotor is mounted on the transmission shaft; a valve plate is pressed tightly on one side of the rotor; more than two radial plunger holes are uniformly formed in the outer cylindrical wall surface of the rotor; a plunger is mounted in each plunger hole; a connecting rod skid shoe is mounted on the plunger; the plunger is connected with the connecting rod skid shoe through a spherical hinge; the bottom of the connecting rod skid shoe is pressed inside the cam; the valve plate is mounted on the pump end cover; an arc-shaped oil absorption groove and an arc-shaped oil pressing groove, which are isolated from each other, are formed in the valve plate; an oil inlet in the pump end cover is communicated with the arc-shaped oil absorption groove; an oil outlet is communicated with the arc-shaped oil pressing groove; and the flow distribution is achieved through the valve plate and the pump end cover. The hydraulic compensated radial plunger pump has the advantages of compact structure, simplicity in transmission, high strength, small processing amount, reliability in supporting, working stability, and long service life.

Description

technical field [0001] The invention belongs to the technical field of radial plunger pumps, and in particular relates to a hydraulically compensated radial plunger pump with end face oil distribution. Background technique [0002] Due to the advantages of high output pressure, large displacement, high volumetric efficiency and long service life, radial piston pumps are widely used in hydraulic systems in forging, metallurgy, ships and other fields. [0003] The flow distribution methods of traditional radial piston pumps are mainly axial flow distribution and one-way valve flow distribution. For the one-way valve flow distribution pump, the pressure or vacuum of the pump cavity acts on the one-way valve to open the valve port or Closed, the oil needs to overcome the spring to do work during the flow distribution process, which will lose part of the energy, and the spring element on the check valve is difficult to design, and it is prone to noise and fatigue damage. For sha...

AI Technical Summary

Problems solved by technology

[0003] The flow distribution methods of traditional radial piston pumps are mainly axial flow distribution and one-way valve flow distribution. For the one-way valve flow distribution pump, the pressure or vacuum of the pump cavity acts on the one-way valve to open the valve port or Closed, the oil needs to overcome the spring to do work during the flow distribution process, and part of the energy will be lost, and the spring element on the check valve is difficult to design, and it is prone to noise and fatigue damage

For shaft distribution pumps, it is necessary to process multiple axial holes and radial grooves on the distribution shaft, which increases the complexity of shaft processing and reduces the strength of the shaft, and the distribution shaft and drive shaft are two independent parts , and its support method is also relatively complicated. At present, the common distribution shaft structure is a cantilever structure, which is prone to vibration and bending during work, which has a negative impact on the long-term work of the pump, which is not conducive to the long-term continuous work of the pump.

In addition, the existing methods of oil distribution through fixed positions, such as shaft distribution, do not have a way to compensate for wear. When wear occurs after long-term work, the leakage will be aggravated

Images