Axial variable displacement plunger pump of swash plate

Abstract

The invention provides a power element used in a hydraulic transmission system. A swash plate variable axial plunger pump consists of a swash plate, a plunger cylinder body and a port plate. The angle-variable swash plate rotates with a drive rotating shaft which is connected by a hinge, and the swash plate drives the plunger to only have reciprocating motion in a fixed cylinder barrel, thus avoiding the disadvantages of large rotating inertia, large friction surface of port surface and easy leakage of a common swash plate axial plunger pump. The swash plate can be divided into a manual swash plate, a hydraulic-control swash plate and a hydraulic-control and spring combined variable swash plate. The swash plate can be conveniently adjusted by a window above a variable shell. The plunger pump has various uses and advantages of small rotating inertia, little friction surface, and high mechanical efficiency and volumetric efficiency, and being insensitive to pollution, generating little heat, being capable of taking as an economical combination pump with 'low pressure and large flow or high pressure and small flow' and the like. Besides as a common pump, the axial plunger pump can also be used in the superhigh pressure and synchronous cylinder field. The axial plunger pump has the advantages of general working accuracy and low production cost.

Description

Technical field: [0001] hydraulic transmission system [0002] A power element widely used in modern hydraulic transmission systems, the swash plate axial piston pump is characterized by driving the shaft through the center of the rotating cylinder and driving the cylinder to rotate together, and each plunger is pressed by a fixed swash plate in the cylinder It only makes relative reciprocating motion, and the oil is sucked in or pressed out respectively through the fixed plane valve plate. Background technique: [0003] This plunger pump has the following disadvantages: [0004] The disadvantage of this kind of plunger pump is that the manufacturing precision of the distribution plate is high, the friction surface is large, the material requirements are special, the moment of inertia of the cylinder is large, the axial pressure balance is difficult, and it is sensitive to pollution. Once the distribution surface is slightly worn, the volume Efficiency will drop significan...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of this kind of plunger pump is that the manufacturing precision of the distribution plate is high, the friction surface is large, the material requirements are special, the moment of inertia of the cylinder is large, the axial pressure balance is difficult, and it is sensitive to pollution. Once the distribution surface is slightly worn, the volume Efficiency will drop significantly

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