Method, device and system for detecting fatigue state of fan toothed belt or pitch bearing
A fatigue state, pitch bearing technology, applied in the direction of measuring devices, testing of mechanical components, control of wind turbines, etc., can solve the problems of high implementation cost and inaccurate detection methods, and achieve low implementation cost, strong real-time performance, easy-to-achieve effects
Active Publication Date: 2018-11-20
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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However, these detection methods are not precise enough and costly to implement
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[0052] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0053] When the wind turbine (referred to as "fan") needs to change the pitch, the pitch system drives the toothed belt through the pitch motor to drive the pitch bearing to change the angle of the blades against the wind to achieve pitch change. Specifically, the controller of the wind turbine gives a command to change the pitch according to the current state of the fan. After receiving the command, the pitch inverter converts the demand into a corresponding current signal to drive ...
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The present application provides a method for detecting the fatigue state of fan toothed belts or pitch bearings. The method obtains the pitch angle according to preset conditions, and obtains the signal characteristic value corresponding to the pitch angle. According to the acquisition timing of the signal characteristic value, Select the pitch angle whose signal characteristic value changes in the pitch angle, and calculate the characteristic statistical value of the selected pitch angle, compare the characteristic statistical value with the preset threshold value, and determine whether the toothed belt or the pitch bearing is in a fatigue state . This method can realize the detection of the fatigue state of the in-service toothed belt or pitch bearing without any additional detection equipment and hardware measures, and has stronger real-time performance and lower implementation cost. Moreover, the method is easy to implement, and the algorithm complexity is low, so the applicability is higher. In addition, the present application also provides a detection device and system for the fatigue state of the toothed belt or the pitch bearing of the fan generator, so as to ensure the practical application and realization of the above method.
Description
technical field [0001] The present application relates to the technical field of wind power generation, and more specifically, to a method, device and system for detecting the fatigue state of a fan toothed belt or a pitch bearing. Background technique [0002] Wind turbines (referred to as "fans") can convert wind energy into electrical energy for power generation. After the fan reaches the full power state, it needs to change the pitch to achieve constant speed control. When changing the pitch, the pitch-changing system drives the toothed belt through the pitch-changing motor to drive the pitch-changing bearing to change the angle of the blade against the wind to realize pitch-changing. [0003] Toothed belts and pitch bearings are subject to very severe fatigue loads and alternating loads under the long-term pitch adjustment requirements of wind turbines. If the toothed belt or the pitch bearing breaks or fails, it will cause the blade to lose control, which will pose a...
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IPC IPC(8): F03D17/00
CPCF03D7/0224F05B2260/4021F05B2260/79F03D17/00F05B2260/80G01M13/023Y02E10/72G01B21/22F05B2260/4031F16H57/01F16H2057/012
Inventor 王青天周杰孙涛
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD