Axial plunger pump

Abstract

The invention discloses an axial plunger pump, which comprises a cylinder body, ball plungers, an inner ring type inclined plate, a main shaft, a flat key, a needle bearing, a plunger retainer ring and a thrust plate, wherein the main shaft penetrates through a central through hole of the inner ring type inclined plate and is connected through the flat key; the connecting end of the main shaft and the cylinder body is connected with the cylinder body through the needle bearing; the plunger retainer ring is arranged on the inner ring type inclined plate and opposite to the inner ring type inclined plate to form an arc-shaped roller path; a plurality of plunger chambers are uniformly arranged on the cylinder body along the circumference; one ball plunger is placed in each plunger chamber; spherical head parts of the ball plungers are embedded into the arc-shaped roller path; the main shaft is rotated to drive the inclined plate to rotate; the ball plungers are subjected to right-and-left piston reciprocating motion under the action of an inclination angle of the inner ring type inclined plate so as to complete oil absorption and oil discharge of the pump.

Description

technical field [0001] The invention relates to the technical field of hydraulic pumps, in particular to a swash plate axial piston pump. Background technique [0002] The main structure is composed of swash plate, sliding shoe, return plate and plunger. The structure of the swash plate mostly uses a plane with a certain angle as the friction contact surface, such as patent CN 201031780 Y. There are also individual patents that adopt other forms, for example, patents CN 102506022 A and CN 201794733 U. The structure of the plunger has a spherical head and a partial arc head. The plunger is connected with the sliding shoe, and the sliding shoe on the head of the plunger is pressed to the surface of the swash plate through the return plate or the return spring. When the swash plate rotates or the cylinder rotates, the surface of the sliding shoe contacts and rubs against the surface of the swash plate, and the plunger is driven to do telescopic movement, so as to realize oil...

AI Technical Summary

Problems solved by technology

[0006] (3) The structure of the return plate is adopted, and the movement of the sliding shoe on the inclined surface will generate overturning force, and the sliding shoe and the return plate will cause interference wear or even cracking, and the sliding shoe will be severely worn and pulled off; the noise is large, and at the same time it is greatly reduced. Increased pump life and efficiency

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