Plunger pump and plunger sliding shoe assembly thereof

Abstract

The invention discloses a plunger pump and a plunger sliding shoe assembly thereof. The plunger sliding shoe assembly comprises a sliding shoe for being attached to a swash plate and a plunger internally provided with a cylindrical cavity; the sliding shoe is provided with a concave spherical structure; the plunger comprises a plunger rod, a ball head arranged at the end of the plunger rod and forming a spherical motion pair with the spherical structure; the ball head is provided with a ball head end face perpendicular to the axial direction of the plunger rod and facing the sliding shoe; theplunger rod is provided with a plunger rod end face relatively arranged with the ball head end face; and the ball head end face and the plunger rod end face are equal in the outer circle diameter andthe area. According to the plunger pump and the plunger sliding shoe assembly, the area of the ball head end face of the plunger is configured to be equal to the area of the plunger rod end face of the plunger, so that the resultant force of high pressure on the two ends of the plunger is small and keeps relatively stable, the abrasion problem of the plunger and the sliding shoe is solved, and theservice life of the plunger sliding shoe assembly is prolonged.

Description

technical field [0001] The present invention relates to the technical field of plunger pump design, more specifically, to a plunger slipper assembly. In addition, the present invention also relates to a plunger pump comprising the above-mentioned plunger shoe assembly. Background technique [0002] As the core component of the plunger pump, the plunger shoe assembly plays a vital role in the flow distribution process of the plunger pump. The plunger shoe assembly has been greatly developed because of its simple structure, its basic shape is spherical and cylindrical, its processing is simple, and its precision can reach high. [0003] In the prior art, the plunger shoe assembly usually includes a plunger and a shoe. The plunger is provided with a cylindrical cavity running through its axial direction. The end of the plunger adopts a partial spherical structure, and the shoe adopts a concave conical surface structure. , in the assembled state, the partial spherical structur...

AI Technical Summary

Problems solved by technology

[0004] But in the variable displacement plunger pump, when the angle of the swash plate changes, the angle between the plunger and the sliding shoe changes accordingly, and the component force of the plunger ball end on the plunger axial direction changes, resulting in The high pressure at both ends of the plunger cannot cancel each other out, which increases the load-bearing value of the plunger and shoe, resulting in increased wear of the plunger and shoe, thereby reducing the service life of the plunger shoe assembly

Images