Hydraulic pipeline fluid pulse active inhibition method based on bilateral overflow principle

Abstract

The invention discloses a hydraulic pipeline fluid pulse active inhibition method based on a bilateral overflow principle. The method utilizes a piezoelectric ceramic direct drive type four-way slide valve as an executive component of fluid pulse active control, A and B ports of the slide valve are connected to same side branch of a hydraulic pipeline, and P and T ports of the slide valve are connected with an oil box; and a sine control signal drives the slide valve to finish a periodic motion process, the A and B ports realize twice overflowing through the P and T ports, namely bilateral overflowing, and the generated overflowing flow can completely counteract source pulse flow, thereby realizing the active inhibition of hydraulic pipeline fluid pulse. The active inhibition method provided by the invention has the advantages that (1) the motion frequency of the slide valve is one half of the flow pulse frequency of a hydraulic system to be eliminated; and (2) maximal overflowing flow can achieve the flow of the slide valve when a piezoelectric ceramics actuator is in maximum elongation quantity. The invention provides the fluid pulse active inhibition method for the hydraulic system which has the advantages of high speed, high pressure and high power density, and the fluid pulse active inhibition method is further easily practical.

Description

technical field [0001] The invention belongs to the field of active control of fluid pulsation in hydraulic pipelines, and in particular relates to an active suppression method for fluid pulsation in hydraulic pipelines based on the principle of bilateral overflow. Background technique [0002] Axial piston pumps are widely used in hydraulic pump source systems due to their high power, high efficiency and reliability. However, due to factors such as its own structure and the compressibility of the oil, the plunger pump must have instantaneous flow pulsation, and the flow pulsation is the fundamental cause of mechanical vibration and fluid noise in the hydraulic pipeline. Therefore, it is of great practical significance to try to eliminate the fluid pulsation of the hydraulic pipeline system. [0003] The active control of hydraulic fluid pulsation has become a research hotspot of scholars at home and abroad because of its strong self-adaptive ability and good vibration damp...

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Problems solved by technology

[0012] The purpose of the present invention is to overcome the problems of high energy consumption, large volume and frequency that cannot meet the requirements of fluid pulsation frequency due to the development of the current hydraulic system in the direction of high speed, high pressure and high power. We propose a method for active suppression of fluid pulsation in hydraulic pipelines based on the principle of bilateral overflow

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