Gear box vibration signal processing and analyzing method

Abstract

The invention relates to a gear box vibration signal processing and analyzing method, which comprises the following steps: synchronously collecting a reference shaft rotating speed signal, a referenceshaft vibration signal and a non-reference shaft vibration signal; identifying the rotating speed pulse edge by the reference shaft rotating speed signal, calculating the instantaneous rotating speedbetween every two pulses, and simultaneously carrying out interpolation calculation on the pulse edge time sequence to obtain an equal angle sampling time sequence; carrying out anti-mixing filteringon the vibration signal of the reference shaft, and carrying out interpolation sampling on the vibration signal of the reference shaft by the equal angle sampling time sequence to obtain an equal angle vibration signal of the reference shaft; obtaining a non-reference axis virtual pulse along time sequence from a reference axis pulse along time sequence, and obtaining an equal angle waveform of anon-reference axis vibration signal through instantaneous rotation speed calculation, equal angle sampling time sequence calculation, digital anti-aliasing filtering and digital resampling. The gearbox vibration signal processing and analyzing method is very suitable for the analysis, fault characteristic extraction and diagnosis of the vibration signals of the intermediate shaft, the planetarywheel shaft and the sun wheel shaft in the gear box and any multi-shafting rotating mechanical system.

Description

technical field [0001] The invention belongs to the field of vibration signal analysis and fault diagnosis of a gear box, and in particular relates to a method for sampling angle domains and equal angles and fault analysis based on an invisible rotating shaft inside the gear box. Background technique [0002] Gearbox is an important transmission equipment, which has the characteristics of compact structure, variable torque, variable speed, high efficiency, etc. It is widely used in aviation, electric power, ships, mines, automobiles and other fields. For fixed-axis gearboxes, the geometric axis positions of all gears are fixed, and the structure is relatively simple. The shafting structure of planetary gearboxes is complex. The wheel shaft rotates on its own axis, and at the same time follows the planet carrier to revolve around the sun wheel shaft, so the transmission path of the vibration signal is long. [0003] Order ratio analysis is a very effective analysis method fo...

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Problems solved by technology

[0004] For fixed-axis gearboxes or planetary gearboxes, the speed sensor can only be installed on the input or output shaft of the gearbox, and cannot track the internal intermediate shafts, planetary gear shafts, and sun gear shafts, and perform order tracking sampling on them, although it can be based on these The rotation speed ratio between the rotating shaft and the input or output shaft can be used to obtain the corresponding order frequency spectrum, but it is impossible to obtain accurate equal-angle sampling waveform data, so it is also impossible to apply some very effective signal analysis methods such as time-domain synchronous averaging technology. , sun gear shaft vibration signal analysis and fault diagnosis

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