Friction pair for plunger rod and plunger hole

Abstract

The invention belongs to the technical field of hydraulic transmission, and discloses a friction pair for a plunger rod and a plunger hole. The friction pair comprises the plunger rod and a plunger cylinder, the plunger hole is formed in the plunger cylinder, the friction pair comprises a first friction surface and a second friction surface, the first friction surface is an outer side wall of theplunger rod, and the second friction surface is an inner side wall of the plunger hole; a first texture area is arranged on the first friction surface, and the first texture area is located on the annular outer side wall at the bottom of the plunger rod; and a plurality of first texture structures are arranged in the first texture area, gaps are formed between every two adjacent first texture structures, and impurities can be contained and stored in the first texture structures. The first texture structures are arranged on the outer side wall of the bottom of the plunger rod, second texture structures are arranged on the inner side wall of the plunger hole of the plunger cylinder, hydraulic support can be better formed, so that the centering property of the plunger rod and the plunger holeis improved, friction is reduced, and lubricating is improved; and impurities can be contained, so that the risk that the plunger rod is blocked and the inner side wall of the plunger hole of the plunger cylinder is scratched is reduced.

Description

technical field [0001] The invention relates to the technical field of hydraulic transmission, in particular to a friction pair for a plunger rod and a plunger hole. Background technique [0002] In the field of hydraulic transmission, the plunger pump is the core component of the hydraulic system. The plunger pump is widely used in various industries because of its superior performance such as high working pressure, high working efficiency, and variable volume. The principle of the plunger pump is to use the plunger to reciprocate in the plunger cylinder to change the volume of the plunger cylinder, and to do work on the fluid in the plunger cylinder to achieve the purpose of pumping fluid. The friction pair between the plunger rod and the plunger hole of the plunger cylinder is a pair of key friction pairs in the plunger pump. [0003] The main problems existing in the friction pair of the plunger hole of the plunger rod and the plunger cylinder are: [0004] 1. Due to t...

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Problems solved by technology

[0007] In order to solve the uneven wear or rapid frictional heat generation caused by the different axial alignment of the plunger rod and the plunger hole of the plunger cylinder in the prior art, and once impurities enter the gap between the plunger hole and the plunger rod In the middle, it may cause surface scratches to affect the seal, reduce the volumetric efficiency, and may also cause the plunger rod to be stuck in the plunger hole, which also affects the life of the whole machine. The present invention provides a plunger for The friction pair of the rod and the plunger hole includes a plunger rod and a plunger cylinder. The plunger cylinder is provided with a plunger hole. The friction pair includes a first friction surface and a second friction surface. The first friction surface is the surface of the plunger rod. The outer wall, the second friction surface is the inner wall of the plunger hole, the first friction surface is provided with a first texture area, the first texture area is located at the annular outer wall of the plunger rod, and the first texture area is provided with A plurality of first texture structures, with intervals between adjacent first texture structures, the first texture structures can accommodate and store impurities

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