Non-axial force biserial radial piston pump distributing oil on end surface

Abstract

The invention discloses a non-axial force biserial radial piston pump distributing oil on an end surface. The biserial radial piston pump comprises a pump housing body; a first cam and a second cam are mounted in the pump housing body; the angle formed between the eccentric directions of the first cam and the second cam is 180 degrees; the two ends of a transmission shaft are supported by pump end covers; a rotor is mounted on the transmission shaft; the two sides of the rotor are propped against a first flow distributing plate and a second flow distributing plate respectively; two rows of radial piston holes are formed in the outer cylinder wall of the rotor in parallel; a piston is mounted in each piston hole; connecting rod skid shoes are mounted on the pistons, and are connected through spherical hinges; the first flow distributing plate and the second flow distributing plate are mounted on the pump end covers respectively; the angle formed between the mounting directions of the first flow distributing plate and the second flow distributing plate is 180 degrees; oil absorption arc grooves and oil pressing arc grooves which are isolated mutually are formed in the first flow distributing plate and the second flow distributing plate; oil inlet holes and oil outlet holes in the pump end covers are communicated with the oil absorption arc grooves and the oil pressing arc grooves respectively. According to the invention, distribution is realized through the first flow distributing plate and the second flow distributing plate; the piston pump has the advantages that the piston pump is compact in structure, simple in transmission, low in flow fluctuation, free from axial force, and reliable in support, conducts automatic hydraulic compensation, and is stable in operation, and long in service life.

Description

technical field [0001] The invention belongs to the technical field of radial plunger pumps, and in particular relates to a double-row radial plunger pump with no axial force and end face oil distribution. Background technique [0002] The main pump in the hydraulic system in forging, metallurgy, shipbuilding and other fields generally adopts a radial piston pump with high output pressure, large displacement and high volumetric efficiency. [0003] At present, the flow distribution methods of radial piston pumps mainly include axial flow distribution and check valve flow distribution. 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 shaft distribution pumps, it is necessary to process multiple axial holes and radial grooves on the distribution shaft, which increases the complexity ...

AI Technical Summary

Problems solved by technology

[0003] At present, the flow distribution methods of radial piston pumps mainly include axial flow distribution and check valve flow distribution. 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

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