Method and device for detecting fan vibration state and matching end equivalent excitation determination method for fan vibration state
A state detection, matching end technology, applied in measuring devices, vibration testing, vibration measurement in solids, etc., can solve the problem of inaccurate fault areas of fan detection components, and achieve simple and easy calculation methods, accurate fault areas, and accurate determination. Effect
Active Publication Date: 2020-02-14
XUJI GRP +4
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[0004] The purpose of the present invention is to provide a method and device for detecting the vibration state of a fan, and a method for determining the equivalent excitation of the matching end, which is used to solve the problem of inaccurate determination of the fault area of the fan detection component in the prior art
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[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0037] Embodiment of the method for detecting the vibration state of the fan:
[0038] Such as figure 1 As shown, this embodiment provides a fan vibration state monitoring and analysis system, which includes: a vibration sensing unit U1, a data processing unit U2, a finite element simulation unit U3, and a monitoring and analysis unit U4 connected sequentially by communication. Among them, the vibration sensing unit U1 is a plurality of vibration sensors arranged unevenly at the vibration monitoring part of the fan. Taking three as an example, the arrangement is as follows: image 3 As shown, the distance L2 between the vibration sensors 1 and 2>the distance L3 between the vibration sensors 2 and 3. The working principle of the fan vibra...
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The invention relates to a method and a device for detecting fan vibration state and a matching end equivalent excitation determination method for fan vibration state. The method comprises the following steps: sampling vibration signals collected by n vibration sensors at a fan vibration monitoring part according to a set sampling period; calculating vibration component signals according to the vibration signals of the fan vibration monitoring part obtained through sampling; calculating equivalent excitation signals of the matching end of the fan vibration monitoring part according to the amplitudes of the vibration component signals and the time when the vibration sensors acquire the vibration signals; and determining the fault area of the fan vibration monitoring part according to the periodicity of the equivalents excitation signal of the matching end of the fan vibration monitoring part. The fault condition of a fan monitoring component is determined by calculating the equivalent excitation signals of the matching end, the calculation method is simple and easy to do, and the fault area can be accurately determined.
Description
technical field [0001] The invention relates to a method and device for detecting the vibration state of a fan, and a method for determining an equivalent excitation of a matching end, belonging to the technical field of wind power generation. Background technique [0002] As a clean and renewable new energy source, wind power is developing very rapidly, especially the development of offshore wind power has become a global hotspot and frontier. As the key equipment for wind power generation, wind turbines (fans for short) will inevitably fail due to the complex operating environment. If the wind turbines stop abnormally due to this, it will seriously affect the power generation efficiency. Therefore, it is very necessary and urgent to monitor the key operating signals of the fan, analyze and diagnose the fault of the fan and determine the fault area. Among them, the faults of fans mainly include electrical faults and mechanical faults. At present, the monitoring and analysi...
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Login to View More IPC IPC(8): G01H1/12G01H1/16G01M7/02
CPCG01H1/12G01H1/16G01M7/02
Inventor 赵江信郭宝甫王坤袁方方田盈徐军黄阮明张梦瑶王小凯李亚辉苑军军
Owner XUJI GRP