Method and device for detecting radial drift of rotating body based on electrostatic sensor array

Abstract

The invention discloses a method and device used for detecting radial drifting of a rotator based on electrostatic sensor arrays and belongs to the technical scope of radial vibration detection of rotary machinery. The device used for detecting radial drifting of the rotator comprises one or more sets of electrostatic senor arrays which are installed on the periphery of the rotator to be detected. According to the method and device used for detecting radial drifting of the rotator based on the electrostatic sensor arrays, an electrostatic signal is generated by each electrostatic sensor through electrostatic induction in the operating process of the rotator, each electrostatic signal is amplified and filtered through a signal conditioning unit and is converted through an analog-digital converter, digital signal processing is then carried out on each converted signal in a microprocessor, the electrostatic strength of a plurality of sets electrostatic signals acquired are calculated and analyzed, and then information of radial drifting of the rotator is obtained. Compared with an existing electrical vortex sensor or an existing laser displacement sensor, the device used for detecting radial drifting of the rotator by means of the electrostatic sensor arrays has the advantages of being simple in structure, low in cost, convenient to operate and maintain, not prone to influence of environmental conditions and the like.

Description

technical field [0001] The invention belongs to the technical scope of radial vibration detection of rotating machinery, and in particular relates to a detection method and device for radial drift of a rotating body based on an electrostatic sensor array. Background technique [0002] Rotating machinery is the core equipment in the fields of electric power, energy, chemical industry, aviation and shipbuilding, such as steam turbines, generators, blowers, compressors, etc., and its operating status directly affects the performance of the entire unit, and is a decisive element for safe and efficient production . However, there may be various errors in the design, manufacture, and assembly of rotating machinery. Due to physical and chemical effects such as load, heat, and friction during its operation, rotor imbalance, rotor misalignment, and shaft Bending, loose parts, etc. Mechanical vibration contains a wealth of equipment operating status information. In order to timely g...

AI Technical Summary

Problems solved by technology

At present, the most widely used is the eddy current sensor, which has a simple structure, wide frequency response, and a large measurement linear range, but it has strict requirements on the environment, especially sensitive to magnetic interference, and cannot measure non-metallic materials or alloy materials.

Due to the complex system and high price of laser displacement sensor, its wide range application is limited

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