Permanent magnet plate type closed swash plate type axial plunger pump and working method thereof

Abstract

The invention discloses a permanent magnet plate type closed swash plate type axial plunger pump and a working method thereof. The permanent magnet plate type closed swash plate type axial plunger pump comprises a plunger pump body, a plunger pump front cover, a central shaft, a permanent magnet plate, a plunger pump front end cover and a conductor copper plate, wherein a plunger pump cylinder body is arranged in the plunger pump body, a plunger is arranged in the plunger pump cylinder body, a thrust plate is arranged between the thrust surface of the plunger pump front cover and the thrust surface of the plunger pump cylinder body, one end of the center shaft is connected with the plunger pump cylinder body, the other end of the center shaft is connected with the permanent magnet plate, permanent magnets with N and S poles spaced mutually are arranged in the permanent magnet plate, the conductor copper plate is fixed to a steel flange, and the steel flange is connected with an output shaft of a motor through an expansion sleeve. The central shaft is sealed in the pump body through magnetic coupling driving of the conductor copper plate and the permanent magnet plate, flow leakage at the central shaft and the end cover is avoided, the problem of bearing abrasion caused by centering is solved, besides, the output flow of the plunger pump can be adjusted by adjusting the size of an air gap, and the plunger pump is compact in overall structure, efficient and capable of saving energy.

Description

technical field [0001] The invention relates to the technical field of construction machinery hydraulic systems, in particular to a permanent disk type closed swash plate type axial piston pump and a working method thereof. Background technique [0002] The axial piston pump relies on the reciprocating movement of the plunger in the cylinder hole to cause the change of the sealing volume to realize oil suction and oil discharge. It is a positive displacement hydraulic pump. The swash plate axial piston pump is an axial piston pump that relies on a swash plate and a spring to make the plunger reciprocate relative to the cylinder. It is one of the most widely used hydraulic components in modern industry. [0003] The central shaft of the traditional swash plate axial piston pump protrudes from the end cover of the pump, the sealing structure between the central shaft and the end cover is difficult to completely solve the leakage problem, and the sealing elements need to be rep...

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Problems solved by technology

[0003] The central shaft of the traditional swash plate axial piston pump protrudes from the end cover of the pump, the sealing structure between the central shaft and the end cover is difficult to completely solve the leakage problem, and the sealing elements need to be replaced frequently; the central shaft and the output shaft of the motor adopt a coupling The connection and installation have high requirements on centrality, serious bearing wear problems, and short service life of parts; adjusting the pump flow requires a special variable mechanism, resulting in a complex overall structure of the pump, a large number of parts, and poor energy efficiency

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