Axial plunger type motor pump

Abstract

The invention provides an axial plunger type motor pump, which belongs to an axial plunger pump in a hydraulic power source and solves the problems that the existing axial plunger pump is larger in axial size, and a conical flat valve generates violent vibration and noise during work. The axial plunger type motor pump comprises a shell, a left end cover, a right end cover, a left tilting tray, a right tilting tray, a motor stator, a motor rotor and a cylinder body shaft, wherein the left end and the right end of the cylinder body shaft are respectively provided with an axial suction hole passage and an axial discharge hole passage, the cylinder body shaft is axially provided with N plunger through holes which are uniformly distributed along the circumference, plunger assemblies are arranged in the plunger through holes, the cylinder body shaft is radially provided with N uniformly distributed suction valve seat holes and N uniformly distributed extrusion valve seat holes, suction valve assemblies and extrusion valve assemblies are respectively arranged in the suction valve seat holes and the extrusion valve seat holes for forming N identical suction valves and N identical extrusion valves. The axial plunger type motor pump is more compact and lighter in structure, high in power density and low in working noise, the working medium can be oil, water or other liquid medium, and the working rotating speed of a plunger pump of a flow distributing valve can be improved.

Description

technical field

[0001] The invention belongs to an axial plunger pump in a hydraulic power source, in particular to an axial plunger motor pump. technical background

[0002] Modern hydraulic transmission technology is gradually developing towards integration and digitalization. Many occasions require a smaller, lighter, lower-noise hydraulic power source to cope with complex environmental conditions.

[0003] Beijing Institute of Precision Electromechanical Control Equipment Zhu Yi and others disclosed "an integrated motor pump for hydraulic system" in the invention patent 201210231242.2. The volume is reduced to a certain extent, and the sealing reliability is improved. However, the integration of the motor and the hydraulic pump of the pump is limited, and the axial dimension is relatively large.

[0004] In 2010, Huazhong University of Science and Technology submitted the invention patent application for "double swash plate valve flow distribution axial piston type wa...

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