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A fault detection method for wind turbine pitch bearings

A pitch bearing and fault detection technology, applied in the field of wind turbines, can solve problems such as fault diagnosis of pitch bearings that are not applicable

Active Publication Date: 2020-04-21
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing technology is not very suitable for fault diagnosis of pitch bearings

Method used

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  • A fault detection method for wind turbine pitch bearings
  • A fault detection method for wind turbine pitch bearings
  • A fault detection method for wind turbine pitch bearings

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] A kind of wind turbine pitch bearing fault detection method of the present invention comprises the following steps:

[0036] Step 1: Collect vibration signals, such as figure 1 As shown, it specifically includes the following steps:

[0037] (1) Stop the wind turbine and lock the impeller;

[0038] (2) if image 3 As shown, four vibration acceleration sensors are installed radially on the raceway 1 where the selected pitch bearing does not rotate relative to the impeller, that is, the inner ring or outer ring, which are respectively the first vibration acceleration sensor 2 and the second vibration acceleration sensor 3 , the third vibration acceleration sensor 4 and the fourth vibration acceleration sensor 5, each vibration acceleration sensor is spaced at 90°, connected to the acquisition system;

[0039] (3) pitch 90°, c...

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Abstract

The invention discloses a wind turbine pitch bearing fault detection method. According to the wind turbine pitch bearing fault detection method, a vibration signal thereof can be acquired when a pitchbearing runs normally; through analysis of an shock signal, caused by exfoliation, scratches, metal scraps and the like, in the vibration signal, an early fault of the pitch bearing is detected, andan early warning is given, so that the bearing can be replaced as early as possible to avoid a serious accident.

Description

technical field [0001] The invention belongs to the technical field of wind turbines, and in particular relates to a fault detection method for pitch bearings of wind turbines. [0002] technical background [0003] At present, when the wind turbine pitch system has obvious faults or failures, and the normal operation of the pitch system cannot be restored after checking the causes of other components (such as pitch motors, controllers) other than the pitch bearing in the pitch system , Generally, the pitch bearing is removed from the wind turbine and decomposed, and then the fault of the pitch bearing is detected from the aspects of macroscopic, microscopic, mechanical properties, hardness, metallographic structure, heat treatment, etc. [0004] The common method for online detection of general rolling bearing faults is to measure the vibration of multiple operating cycles at the bearing seat or other places close to the bearing, and then analyze whether there is a periodic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/045
CPCG01M13/045
Inventor 马振国赵勇韩斌邓巍
Owner XIAN THERMAL POWER RES INST CO LTD