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A low-speed heavy-duty gear crack fault online detection method

A detection method, low-speed heavy-duty technology, applied in the direction of measuring devices, testing of mechanical components, testing of machine/structural components, etc., can solve the problems of low vibration signal characteristic frequency, low signal-to-noise ratio, submersion, etc., to achieve good Effect of anti-interference and accuracy, high application value

Active Publication Date: 2019-05-21
苏州微著设备诊断技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of fault diagnosis of low-speed and heavy-duty gears, the following problems are still faced: (1) The vibration information of gears passes through a complex transmission path (gear-shaft-bearing-casing) from the fault source to the sensor, and the signal-to-noise ratio is low; (2) The characteristic frequency of the vibration signal of the low-speed heavy-duty gear is low, the vibration and speed are not sensitive, and it is easy to be submerged in the vibration signal of other equipment and its background noise
Due to the above reasons, the technology based on vibration measurement and analysis is not ideal for online detection of low-speed and heavy-duty gears, and failures such as early cracks of low-speed and heavy-duty gears cannot be found in time

Method used

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  • A low-speed heavy-duty gear crack fault online detection method
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  • A low-speed heavy-duty gear crack fault online detection method

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] An enterprise needs to conduct online monitoring of the running status of the main reduction gear of the axle, so as to detect the early failure of the gear in time and lock the weak link of the gear design. Usually, the condition monitoring of gears based on vibration information is selected, but under low-speed and heavy-load conditions, the signal-to-noise ratio of the vibration signal of the gear is low, and it is easily disturbed, and the early failure of the gear cannot be found in time. The invention solves the problem of low-speed and heavy-duty gears. condition monitoring problems.

[0029] refer to figure 1 , a low-speed heavy-duty gear crack fault online detection method, comprising the following steps:

[0030] Step 1, installing a torque sensor at the motor shaft of the gear and the coupling of the gear shaft, and installing a ph...

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Abstract

The present invention provides a low-speed heavy-duty gear crack fault online detection method. The method comprises: measuring shaft speed pulse signals of an input shaft and torque signals of the input shaft; performing mean removal processing of the torque signals; employing the shaft speed pulse signals to perform time-domain synchronization mean processing TSA processing of the torque signals, wherein target frequencies are rotation frequencies of the input shaft and an output shaft; calculating the root-mean-square value of the torque signals after the time-domain synchronization mean processing TSA processing, taking the root-mean-square value as an index for gear state monitoring; and drawing indexes extracted by the torque signals collected at different moments as a gear state monitoring curve. The low-speed heavy-duty gear crack fault online detection method employs the shaft speed pulse signals and the torque signals to realize state monitoring of the low-speed heavy-duty gear to timely discover early stage faults, has important meanings for the design and the processing of the gear, and has high application values in the gear development test field and the like.

Description

technical field [0001] The invention relates to the technical field of mechanical fault diagnosis, in particular to an online detection method for crack faults of low-speed and heavy-duty gears. Background technique [0002] In the fields of mining machinery, wind power generation, and large ships, gears usually operate under low-speed and heavy-load conditions. The harsh working environment leads to cracks and even broken teeth of low-speed and heavy-load gears. From the perspective of eliminating hidden dangers of accidents, reducing personnel and property losses, and improving the economic benefits of enterprises, the online detection of low-speed and heavy-duty gears has great practical significance. At present, the technology based on vibration measurement and analysis has achieved success in the field of gear fault diagnosis, and various new technologies and methods are constantly emerging. However, in the field of fault diagnosis of low-speed and heavy-duty gears, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/021
CPCG01M13/021
Inventor 王琇峰高鹏
Owner 苏州微著设备诊断技术有限公司
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