Self-centering and anti-overturning split type return stroke plate

Abstract

The invention discloses a self-centering and anti-overturning split type return stroke plate, which comprises two concentric discs, where the front end of the lower disc is provided with an enhanced limit boss and a sliding shoe oil film thickness limit boss, a sliding shoe hole of the lower disc is formed by the connection of equal-radian nine inferior arcs which are arranged around a spherical hinge supporting hole axis inside the limit boss, nine equal-radian small kidney-shaped grooves are formed around the spherical hinge supporting hole axis in a spherical arc surface boss at the rear end surface of the lower disc, small kidney-shaped grooves are communicated with an oil chamber on the bottom surface of slid shoe through an oil passing hole; a slide shoe hole is formed by the connection of equal-radian nine major arcs which are arranged around the spherical hinge supporting hole axis of the upper disc. The self-centering and anti-overturning split type return plate can complete the reliable return stroke of an axial piston pump plunger sliding shoe component in an oil absorption area, the return stroke plate is designed to be matched with a spherical surface of a swash plate, so that the force condition of the return stroke plate is good, automatic centering is strong, the split type return stroke plate has a capability of anti-overturning; the structure of the return stroke can effectively avoid the eccentric wear caused by the directly contacting of the sliding shoe and the swash plate, the maximum oil film thickness of a slide shoe pair is limited, and the mechanical efficiency and volume efficiency of a pump can be improved.

Description

technical field [0001] The invention relates to a return stroke structure of a plunger shoe assembly of a swash plate axial plunger pump, and is especially suitable for the return stroke of a plunger shoe assembly of a swash plate axial plunger pump working under high-speed conditions. Background technique [0002] The swash plate axial piston pump is widely used in the hydraulic system of various construction machinery due to its advantages of high rated working pressure, high power density, and convenient variable adjustment. Its performance and reliability directly affect the performance and reliability of the hydraulic system. sex. With the development trend of lightweight, energy-saving and comfortable operation of the main engine, higher requirements are put forward for the pressure level, speed and working reliability of the axial piston pump. With the increase of pressure level and speed, the working condition of the pump becomes more and more severe, and the failur...

AI Technical Summary

Problems solved by technology

The eccentric wear of the sliding shoe pair will reduce the mechanical efficiency and volumetric efficiency of the pump. In severe cases, the failure of a single sliding shoe pair may cause a chain reaction such as tearing of the return plate, which directly leads to the failure of the whole pump.

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