Hydraulic valve torque motor air gap measurement and performance debugging method

Abstract

The invention relates to a hydraulic valve torque motor air gap measurement and performance debugging method. The method comprises the following steps: 1) connecting a port P of a hydraulic valve with high-pressure oil, connecting a port T with an oil tank, and serially connecting a flowmeter to the space between a port A and a port B; 2) taking a low-frequency triangular wave signal with the amplitude being rated current as input current of a torque motor; 3) during the working process of the hydraulic valve, acquiring a hydraulic valve no-load flow characteristic curve in a complete cycle period, sequentially inserting gauss meters in different working air gaps, and repeatedly circulating the current to obtain magnetic induction intensity curves at four air gaps; and 4) according to the distribution condition of the magnetic induction intensity curve at each air gap, judging the air gap error form of the corresponding air gap, judging whether zero offset meets requirements in combination with the hydraulic valve no-load flow characteristic curve, adjusting each air gap of the torque motor, and completing performance debugging. Compared with the prior art, the measurement method of the invention is simple, and has the advantages of good operability, high accuracy and high efficiency.

Description

technical field [0001] The invention relates to the technical field of hydraulic valve performance detection, in particular to a hydraulic valve torque motor air gap measurement and performance debugging method. Background technique [0002] Hydraulic valves, including electro-hydraulic servo valves and electro-hydraulic proportional valves, have significant advantages such as high control precision, fast response, small size, light weight, and high power amplification factor, and have been widely used in aerospace, military, ship, and industrial fields. , the electro-hydraulic servo valve and the electro-hydraulic proportional valve are the core components of the hydraulic control system, which have high requirements for precision, which brings about the increase of detection and maintenance costs. The assembly of the electro-hydraulic servo valve and the electro-hydraulic proportional valve involves many The cooperation of precise parts and the inevitable errors of each pa...

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Problems solved by technology

[0004] Literature (Fu Yaobao, Li Cong, Li Changming, Lu Liang. Influence of torque motor air gap error on electro-hydraulic servo valve bias[J]. Journal of Huazhong University of Science and Technology (Natural Science Edition), 2019,47(03):55 -61.) The influence of the air gap error of the torque motor on the zero deviation of the electro-hydraulic servo valve is analyzed. The requirements for key dimensions in the electro-hydraulic servo valve and electro-hydraulic proportional valve are relatively strict. For example, the working air gap length of the torque motor is only a few 100 microns, and the allowable error is only a few microns. The air gap error of the torque motor is closely related to its performance, but conventional detection methods are difficult to meet this requirement. Among the torque motors, there is no clear and written detection and debugging method

At present, most technicians detect and debug torque motor performance based on experience, intuition, and lack of professionalism

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