axial piston pump

Abstract

Disclosed is an axial plunger pump. The axial plunger pump comprises a casing (1), an input main shaft (2) rotatably mounted inside the casing (1) and comprising an intermediate oblique bent section (22), a swash plate (5) rotatably mounted on the intermediate oblique bent section (22), a plurality of connecting rods (7), each connecting rod having one end hinged to the swash plate (5) via a ball head (71) and the other end provided with a plunger (4), and a cylinder block (10) having a cylinder hole (101) where the plunger (4) can be inserted in a reciprocating manner. The cylinder block (10) is fixed relative to the casing (1) and performs a spatial spherical oscillation along with the rotary swash plate (5) of the input main shaft (2), wherein the input main shaft (2) further comprises a first linear section (21). The first linear section (21) is rotatably supported on the casing (1) via a bearing (31), and a balance ring (25) is further provided on the first linear section (21), the balance ring (25) being of an eccentric structure and rotating together with the input main shaft (2). By providing the balance ring (25) of an eccentric structure, the unbalanced moment of the swash plate (5) can be further offset, thereby lowering the vibration and noise of the whole axial plunger pump.

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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