An inclined-axis hydraulic plunger pump or motor

Abstract

An inclined-axis hydraulic plunger pump or motor, which consists of a casing, a plunger connecting plate, a cylinder body, a plunger, a flow plate and a pump cover to form a sealed working volume, the plunger connecting plate and a transmission shaft are integrated, and the plunger There is an inclination angle between the connection plate and the central plunger. There are 7 plungers in the plunger hole of the cylinder body. The ball head of the plunger is matched with the ball socket on the plunger connection plate. The ball head of the plunger is connected to the plunger through the return plate. The distribution plate is installed on the pump cover, and the pump cover is connected with the casing. There is a damping hole in the plunger. The damping hole is a three-stage structure. The first one is viewed from the bottom of the plunger to the ball head. The diameter and length of the damping hole in the first section are greater than the diameter and length of the damping hole in the second section, and the diameter and length of the damping hole in the second section are greater than the diameter and length of the damping hole in the third section. The present invention obtains a very good damping effect without installing a damper by improving the damping hole in the plunger.

Description

technical field [0001] The invention relates to the technical fields of hydraulic pressure, machinery and electronic control, in particular to an inclined-axis hydraulic plunger pump or motor. Background technique [0002] Axial hydraulic piston pumps or motors are currently widely used in various hydraulic systems due to their small size, light weight, high power density, and easy control. [0003] Among the axial hydraulic piston pumps or motors, the inclined axis axial hydraulic piston pump is a high-pressure and large-displacement axial hydraulic piston pump. Its structural characteristics and main technical indicators are: small size, compact and simple structure, The performance is relatively good, the pressure can reach up to 40Mpa, the speed can reach up to 6300rpm, the total efficiency is high, and the life span is about 5000 hours. It is a relatively advanced and reliable axial hydraulic piston pump or motor in the world today. Due to the wide range of application...

AI Technical Summary

Problems solved by technology

[0005] The plunger structure in the existing oblique axis axial hydraulic plunger pump or motor is as follows: image 3 As shown, the damping hole in the plunger 4 is composed of a damping hole 4.1 with a large diameter and a damping hole 4.2 with a very small diameter. A problem with the damping hole in this structure is that the damping effect is not very ideal, so it is necessary to use a large diameter damping hole 4.1. Install a damper in a small damping hole, and it is difficult to install a damper in such a very small diameter damping hole, and it also increases the maintenance cost

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