Two-dimensional plunger pump based on minimum contact stress track and track design method

Abstract

The invention provides a two-dimensional plunger pump based on a minimum contact stress track. The two-dimensional plunger pump comprises a left pump body and a right pump body, wherein a pump shaft is arranged in the left pump body and the right pump body in a penetrating mode; a cylinder body is arranged in the left pump body, and a cam assembly and a roller assembly are arranged in the right pump body; a plunger is arranged in the cylinder body, the plunger is fixedly connected to the pump shaft, and the plunger can do linear reciprocating motion in the axial direction of the cylinder body; and the left end of the plunger and the cylinder body define a left cavity, the right end of the plunger and the cylinder body define a right cavity, the volume of the left cavity and the volume of the right cavity change along with the reciprocating motion of the plunger, the cam assembly comprises a left cam and a right cam, cam track curved surfaces are arranged on the opposite axial end surfaces of the left cam and the right cam correspondingly, and a roller is matched with the left cam and the right cam to rotate. The invention further provides a design method of the minimum contact stress track. The two-dimensional plunger pump has the advantages that the flow is kept stable, the pressure pulsation is small, the stress is uniform, no torque pulsation is output, no trapped oil exists, and the working noise is low.

Description

technical field [0001] The invention relates to a plunger pump, in particular to a two-dimensional plunger pump and a design method for a track based on a minimum contact stress track. Background technique [0002] The curved raceway is a key part of the axial and radial plunger type multi-action low-speed high-torque hydraulic components, and its design determines the performance and life of the original. According to the idea of ​​geometry, the main shapes of the designed curves are single and double arc shapes, straight line combination curves and other curves. This type of curved guide rail has a relatively simple structure and is easy to process. However, it is prone to oil trapping, knocking sound when the speed is high, pulsation in the output torque, relatively high local contact stress, and short working life. According to the kinematics point of view, the typical curve types designed by this idea include constant acceleration and constant deceleration curves, tra...

AI Technical Summary

Problems solved by technology

However, it is prone to oil trapping, knocking sound when the speed is high, pulsation in the output torque, relatively high local contact stress, and short working life.

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