Gear damage factor detecting method and device and wind turbine generator system

A damage factor and gear technology, applied in the field of mechanical non-destructive testing, can solve the problems of low gear damage accuracy, existing errors, gear damage factor errors, etc., and achieve the effect of improving accuracy and reducing errors

Active Publication Date: 2018-07-24
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, using time-domain kurtosis analysis to identify gear damage means that the corresponding data of the peak value is repeated every time the gear shaft rotates. Among them, the factor affecting the peak value change is set to be the vibration response signal generated by the gear damage, but there are other factors in practice If the time-domain kurtosis coefficient is simply used as the gear damage factor, there will be errors, which will reduce the accuracy of gear damage assessment; while using the sidelobe energy analysis of the gear mesh frequency in the order domain to identify gear damage, Since the vibration response signal generated by gear damage is usually an impact reflection, and the shaft speed is consistent in the repetiti...

Method used

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  • Gear damage factor detecting method and device and wind turbine generator system
  • Gear damage factor detecting method and device and wind turbine generator system
  • Gear damage factor detecting method and device and wind turbine generator system

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Experimental program
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Embodiment 1

[0050] figure 1 The flow chart of Embodiment 1 of the detection method for the gear damage factor provided by the embodiment of the present invention is as follows: figure 1 As shown, the detection method of the gear damage factor in the embodiment of the present invention may specifically include the following steps:

[0051]100. Perform TSA processing of the designated axis on the collected gear signal to obtain a TSA waveform signal.

[0052] Generally speaking, after the tooth damage of the gear occurs, when it meshes with other gears, an additional shock-type vibration response signal will occur. Based on this phenomenon, in the prior art, the gear damage information can be extracted from the time domain, for example, the time domain kurtosis is used as an index to evaluate the damage degree of the gear. Alternatively, the gear damage information can be extracted from the order domain, for example, the sideband energy calculation method for the meshing frequency is used...

Embodiment 2

[0077] Figure 12The flow chart of the second embodiment of the detection method for the gear damage factor provided by the embodiment of the present invention, as Figure 12 As shown, the detection method of the gear damage factor provided by the embodiment of the present invention is in figure 1 The technical solutions of the present invention will be further described in more detail on the basis of the illustrated embodiments.

[0078] Such as Figure 12 As shown, the detection method of the gear damage factor provided by the embodiment of the present invention. Specifically, the following steps may be included:

[0079] 200. Collect the vibration response signal of the gear and the shaft speed signal of the known shaft of the gear.

[0080] For example, a sensor can be used to collect the vibration response signal of the gear, and the sensor in the embodiment of the present invention can include but not limited to: an acceleration sensor, a strain gauge, a thin film or...

example 1

[0104] Figure 13 It is the physical picture of the secondary high-speed pinion in the multi-stage fan gearbox, such as Figure 13 As shown, the secondary high-speed pinion and many other components are damaged. Figure 14 for Figure 13 Schematic diagram of the original vibration response signal corresponding to the middle and high speed pinion, Figure 15 for Figure 14 Schematic diagram of the waveform signal after the corresponding secondary high-speed axis TSA; Figure 14 As shown, due to the operating response signals of each component of the gearbox and the damage response signals of each damaged component, the damage response signal of the sub-high speed pinion is not obvious in the shaft cycle domain of the medium and high speed shaft. Such as Figure 15 As shown, in the Figure 14 Each signal in is processed by TSA technology to obtain the TSA waveform signal of the secondary high-speed pinion in the shaft period domain of the medium-high speed shaft.

[0105]...

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PUM

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Abstract

The embodiment of the invention provides a gear damage factor detecting method and device and a wind turbine generator system. The method comprises the steps that a collected gear signal is subjectedto designated axis time domain synchronous average TSA treatment, and a TSA waveform signal is obtained; an envelope line corresponding to the TSA waveform signal is obtained according to the TSA waveform signal; the envelope line is converted into a corresponding an order spectrum according to the set conversion rule; and a gear damage factor is detected according to the order spectrum. Accordingto the technical scheme of the embodiment, the gear damage factor can be determined according to a gear signal and designated axis information, the error of the obtained gear damage factor is decreased, and the accuracy of gear damage evaluation is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of mechanical non-destructive testing, and in particular to a method and device for detecting damage factors of gears, and a wind power generating set. Background technique [0002] Gears are an important part of mechanical equipment. The gears of large-scale mechanical equipment carry a large torque. Under the environment of continuous work for a long time, the teeth of the gears are prone to failure damage such as fatigue cracks, tooth surface wear, pitting and gluing. If timely and effective maintenance cannot be obtained, accidents such as broken teeth and fractures will occur, making the equipment unable to operate and causing heavy losses to production. [0003] The assessment of gear damage is usually achieved by the corresponding modes in the rotational period domain of the corresponding shaft. Generally speaking, after the teeth of a gear are damaged, impact vibration will occ...

Claims

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Application Information

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IPC IPC(8): F03D17/00G01M13/02
CPCG01M13/021G01M13/028
Inventor 罗华庚
Owner CHNA ENERGY INVESTMENT CORP LTD
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