Research on Comprehensive Fault Diagnosis Method of Air Compressor Oil Based on Multi-level Spectrum Analysis
Multi-level spectral analysis of air compressor oil comprehensive fault diagnosis method Wang Yan\Liu Zhigang 2, Wang Xiaozhi 2, Lin Weiguo 3 1 School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China 2 College of Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, China 3 Huazhong Agriculture College of Engineering, Wuhan 430070, Hubei, China, and multi-level linear programming method is used to optimize the design of air compressor fault diagnosis method, and a multi-level optimization method model for air compressor integrated fault diagnosis is established. Through the spectral analysis of the oxidized abrasive grains of non-ferrous metals, the fault type and fault degree of the air compressor are judged, and the non-destructive testing of the air compressor is realized, which provides a reliable theoretical basis for the research of the air compressor fault diagnosis method.
A press is a kind of mechanical power equipment widely used in metallurgy, mining and machinery manufacturing. Due to the complicated structure of air compressor, the fund project: Nanchang University doctoral research start-up project (06301043); National Natural Science Foundation Youth The fund "Research on the robust design of agricultural machinery equipment based on SPC feedback quality characteristics" (51305152) is the automatic detection of mechanical and electronic equipment and equipment.
Corresponding author: Liu Zhigang, male, born in 1980, Ph.D., associate professor, main research directions for safety information simulation technology often malfunction, especially abrasive wear and fatigue wear, both of mechanical failure is difficult to diagnose by conventional methods, to air The mechanical failure of the press machine brings a lot of trouble. Based on the multi-level linear programming method, the author optimizes the air compressor fault diagnosis method, establishes a multi-level optimization method model for air compressor integrated fault diagnosis, and realizes air compressor oil and liquid synthesis through spectral analysis. The mechanical analysis of the fault diagnosis method obtained the spectrum of the mechanical fault, which provided a theory for the air compressor fault diagnosis and maintenance technology.
This column edits Lu Qiu I 1 air compressor oil comprehensive fault diagnosis method There are five kinds of common mechanical failures of air compressors, the most common are abrasive wear and fatigue wear, therefore, it should be monitored in real time. However, the structure of the air compressor is relatively complicated, and it is difficult to diagnose using a general fault diagnosis method. The structure of the air compressor is as shown.
The complex structure of the air compressor is characterized by multi-level spectral analysis of oil comprehensive fault analysis method to achieve air compressor fault diagnosis. Generally, abrasive wear mechanical failure is accompanied by abrasive falling off. It is the most common mechanical failure, accounting for about 50% of the total failure. The air compressor failure detection scheme designed by the author is as shown.
As shown in the figure, the multi-level spectral analysis and detection scheme designed by the author mainly detects the abrasive grains of non-ferrous metals in real time, and obtains the spectrum analysis scheme by analyzing the weights of different levels of support, change rate and prediction rate. Finally, six metals such as Mo, Ca and P were selected as the non-ferrous metal abrasive particles to detect the metal, and the oxidized abrasive particles were selected as the fault detection scheme. The spectrum display of the air compressor failure can be obtained by detecting the oxidized abrasive particles.
1.1 Multi-level intelligent optimization method for fault diagnosis The multi-level function consists of different functions, and the conditions of the hierarchical function are in line with the linear programming. The mathematical expressions are as follows: the constraint is the integration of the hierarchical function, and the multi-level can be realized by the formula (1). Linear programming of functions.
V2, vJT The above multi-level functions can be written in the form of a matrix.
The constraint condition is to solve a single-level problem first, assuming that the optimal value is r/, and the problem of the optimal value is converted into a hypothesis; the value infinitely approximates the hierarchical optimization value r, the mechanical fault function can be written as the hierarchical optimization value r, and the function form can be written as system. Therefore, the minimization function can be constructed: the optimal point solution is solved by constructing the ideal point method, and the mechanical fault frequency function is assumed to be two hierarchical functions: 3 Conclusion The author uses the multi-level optimization method to realize the integrated fault of the air compressor oil. The non-destructive testing of diagnosis has established a multi-level optimization method model for comprehensive fault diagnosis of air compressor oil, and the linear programming multi-level function relationship and matrix are given. The spectrum of the oxidized abrasive grains of the air compressor was obtained by the principle of spectral analysis, which provided technical support for the air compressor fault diagnosis and maintenance technology.
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