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Gearbox fault diagnosis method and device

A fault diagnosis device and fault diagnosis technology, applied in the field of wind power, can solve problems such as waste of manpower and material resources, achieve the effects of improving reliability, reducing operation and maintenance costs, and prolonging profit time

Inactive Publication Date: 2014-06-04
SHANGHAI DIANJI UNIV
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Problems solved by technology

In the existing maintenance system of wind turbines, most of them still adopt the method of after-event maintenance and regular maintenance, which easily causes a lot of waste of manpower and material resources

Method used

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  • Gearbox fault diagnosis method and device

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Embodiment Construction

[0016] The gearbox fault diagnosis method and device of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the embodiments of the present invention are preferred solutions for the purpose of explanation, and are not intended to limit the scope of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0017] see figure 1 , a flow chart of the gearbox fault diagnosis method of the present invention, and the steps of the method will be described in detail next.

[0018] S11: Denoise the ...

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Abstract

The invention provides a gearbox fault diagnosis method and device. The method includes the steps that (1) denosing is carried out on vibration signal data of a gearbox by means of a wavelet denosing method, (2) multi-scale wavelet decomposition is carried out on denoised vibration signals to obtain decomposition graphs of different decomposition scale signals, (3) multi-scale wavelet reconstruction is carried out to obtain a low-frequency reconstruction signal and a high-frequency reconstruction signal, (4) the low-frequency reconstruction signal is compared with a low-frequency reconstruction signal which is obtained in advance in a fault-free state in the same scale, and if the two low-frequency reconstruction signals are different and the difference tends to be larger, it is judged that a fault tendency exists. By means of the method and device, multi-fault gearbox fault diagnosis can be carried out easily and effectively, reliability of a whole fan is improved, operation and maintenance cost of the whole fan is reduced, and profit time of the fan is prolonged.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a multi-fault-oriented novel gear box fault diagnosis method and device based on multi-scale wavelet analysis and Hilbert transform. Background technique [0002] In recent years, wind power technology has developed rapidly in the field of new energy. Due to the harsh operating environment of wind turbines, it is difficult to maintain the equipment when the turbine fails. Therefore, active maintenance of wind turbines should be strengthened at ordinary times to avoid difficulties caused by passive maintenance. The gearbox is one of the important components in the wind turbine. As we all know, the gearbox failure accounts for a large proportion of the mechanical failures of the entire wind turbine. It is a common fault, so the fault detection of the gearbox is extremely important. In the existing maintenance system of wind turbines, most of them still adopt the method of after...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/02
Inventor 杨明莉吕永海刘三明刘琦王致杰邹杨
Owner SHANGHAI DIANJI UNIV
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