Axial plunger pump

Abstract

The invention provides an axial plunger pump. The axial plunger pump comprises a shell, an input main shaft, a tilting tray, multiple connecting rods and a cylinder, wherein the input main shaft is rotatably installed in the shell and comprises a middle tilted and curved section, the tilting tray is rotatably installed on the middle tilted and curved section, one end of each connecting rod is hinged to the tilting tray through a ball head, the other end of each connecting rod is provided with a plunger, and the cylinder is provided with cylinder holes which can enable the plungers to be inserted in a reciprocating motion manner; and the cylinder is fixed relative to the shell, and the tilting tray does spatial spherical oscillation along with rotation of the input main shaft, wherein an intersection point of the main axis of the input main shaft and the axis of the middle tilted and curved section, the spherical oscillation center of the tilting tray and the center of a circle formed by centers of the ball heads of the multiple connecting rods coincide at a coincident point (A). By means of multi-center coincidence, unbalanced moment of the tilting tray can be further counteracted, and vibration and noise of the whole axial plunger pump is further reduced.

Description

technical field [0001] The present invention relates to the field of axial piston pumps, and in particular to an axial piston pump suitable for pumping low viscosity liquids, such as fresh water or sea water. Background technique [0002] Piston pumps are important devices for pumping fluids. It relies on the reciprocating movement of the plunger in the cylinder bore of the cylinder to change the volume of the sealed working chamber to achieve suction and discharge. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment, and is widely used in high pressure, large flow and flow adjustment occasions, such as hydraulic presses, engineering machinery and ships. [0003] Piston pumps include two representative forms, axial piston pumps and radial piston pumps, and axial piston pumps are widely used due to their small size and other advantages. [0004] A conventional axial piston pump consists of a cylinder,...

AI Technical Summary

Problems solved by technology

However, the problem with this solution is that the rotating main shaft is supported by a cantilever, resulting in a large unbalanced moment, which makes the swing stability of the swash plate poor during operation, and the vibration of the entire pump is large, resulting in problems such as noise and friction.

However, this solution still cannot completely solve the problems of large vibration, poor rotational stability, high noise and friction of the plunger pump, and it also increases the friction between the guide slider and the guide chute, thereby reducing the overall pump life. life

In addition, since the main shaft is supported by two sets of bearings at its input end and an additional set of bearings is used at the opposite end of the main shaft, the main shaft is over-constrained, resulting in excessive stress in the main shaft, lowering the main shaft and And then the whole life of the pump

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