Magnetic levitation auxiliary supporting plunger pump

Abstract

The invention discloses a magnetic levitation auxiliary supporting plunger pump for a sliding track structure. The plunger pump mainly comprises a plunger, a sliding track and a swash plate; the plunger is connected to the sliding track through a spherical hinge; and one end, backing onto the spherical hinge, of the sliding track translates in a sliding way of the sliding track of the swash plate in the circumferential direction. The plunger pump is characterized in that two magnetic fields with opposite polarities are arranged on the sliding track and the swash plate respectively; an included angle is formed between the direction of the magnetic field on the swash plate and the normal line of the working surface of the sliding track; and the applied moment of the magnetic field force on the sliding track is used for balancing the inclining moment applied to the sliding track so as to decrease or eliminate a wedge-shaped angle of an oil film between a kinematic pair of the swash plate and the sliding track. According to the plunger pump, the maximum contact stress of the kinematic pair of the swash plate and the sliding track can be reduced, and the abrasion of the sliding track can be reduced; the leakage of media between the kinematic pair of the swash plate and the sliding track can be reduced; and the ratio of the theoretical displacement to the power density of plunger pumps with same-specification plungers can be increased.

Description

technical field [0001] The invention belongs to the technical field of hydraulic transmission, and in particular relates to a maglev auxiliary support plunger pump. Background technique [0002] There are currently three working mechanisms for the oil film support of the sliding shoe and the swash plate kinematic pair, such as figure 1 shown. figure 1 The supporting force of the sliding shoe in the kinematic pair in (a) is a dynamic pressure oil film support. When the contact stress between the sliding shoe and the swash plate exceeds the pressure limit of the oil film, dry friction will occur between the sliding shoe and the swash plate. This structure is used in early low-pressure plunger pump. As the application pressure of the plunger pump increases, the structure of (a) cannot meet the requirements, so the structures in (b) and (c) appear. (b)D s >D p , the area of ​​the pressure chamber is slightly larger than the cross-sectional area of ​​the plunger, and the ...

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Problems solved by technology

[0006] At present, the working mechanism of the sliding shoe and the swash plate kinematic pair has not broken through the above three forms, but a lot of research has been done on the details of the structure, such as using the gap between the plunger and the cylinder as a substitute for the slender damping hole that is easy to block. The structure of flow action, Xu Yaoming and German scholar H.Thoma proposed a spiral damping groove structure to improve the problem of pollution blockage

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