Low-noise axial plunger pump based on indexing angle of pumps in series

Abstract

The invention discloses a low-noise axial plunger pump based on an indexing angle of pumps in series, mainly comprising a main shaft, a bearing, a shell body, a bolt component, a connecting body, an inclined disc, a back-stroke tray, a plunger, a flow distribution plate, a cylinder body and a slippage shoe. The axial plunger pump is provided with two sets of rotor structures which consist of the sliding shoe, the plunger, the cylinder body and the flow distribution plate, an oil sucking hole and an oil discharging hole are shared by two rotor structures, the indexing angle exists between two rotor structures, therefore, a fixed phase difference exists between the dynamic changes of oil discharging quantities of two rotor structures, when two oil flows is converged at the oil discharging hole position, an average effect is generated, the actual exit flow pulsation of the axial plunger pump is reduced by more than 50%, the fluid noise of flow pulsation as a shock excitation source is greatly reduced.

Description

technical field [0001] The invention relates to an axial plunger pump, in particular to a low-noise axial plunger pump based on the displacement angle of series pumps. Background technique [0002] Due to the advantages of high working pressure, high power density, and convenient variable control, axial piston pumps are the most widely used core power components in hydraulic transmission systems, but they also have significant disadvantages such as high noise. As a major theme of the industry, the requirement to reduce the working noise level of axial piston pumps is becoming increasingly urgent. The noise of the axial piston pump is divided into fluid noise and structural noise. The excitation source of the fluid noise is the flow pulsation at the pump outlet. The geometric flow pulsation of the axial piston pump decreases as the number of plungers increases, but it is limited by the structure. , the number of plungers in existing axial piston pumps is generally 9, and th...

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Problems solved by technology

However, the noise level of the axial piston pump is still maintained at about 80 decibels when it is fully loaded. As a kind of noise pollution, it greatly limits its application occasions, and some new flow distribution structures and flow pulsation absorbers greatly increase the pressure of the axial piston pump. Due to the complexity and cost of the pump structure, the vibration and noise reduction of axial piston pumps is still a difficult and key research point for relevant research institutions. noise reduction structure

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