Tower drum bolt state monitoring method
A bolt and state technology, applied in the field of tower bolt state monitoring, can solve the problems of large collapsed tower safety hazards, safety accidents, economic losses, fatigue fractures, etc., achieve good protection effects, ensure safe operation, and reduce economic losses.
Pending Publication Date: 2022-04-05
HUANENG CLEAN ENERGY RES INST
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Problems solved by technology
The bolts connected to each section of the tower tube have been running for a long time under the action of this variable load stress. The phenomenon of bolt loosening is more serious, and even fatigue fractures may occur. safety accidents and economic losses
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[0024] Such as figure 1 As shown, the embodiment of the present invention provides a method for monitoring the condition of tower bolts, including the following steps:
[0025] Step 101: Installing a vibration sensor on the front of the fan; specifically includes the following steps:
[0026] First determine the yaw "0" angle position as the front of the fan, and then install the vibration sensor at a specific position close to the edge of the yaw meshing teeth on the front of the fan.
[0027] As an example of this embodiment, the vibration sensor should be based on the vibration speed sensor, and wireless connection or wired connection can be selected according to the needs of the site; the wireless connection is to install a vibration signal wireless transmission device on the speed sensor, and the signal can be transmitted wirelessly. Send it to the engine room; the wired connection means that the signal is directly transmitted to the engine room through the signal line a...
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The invention discloses a tower cylinder bolt state monitoring method. The method comprises the following steps that vibration signals of a draught fan at different wind speed sections are obtained; analyzing the vibration signal to establish a vibration low-frequency component database; and comparing the low-frequency component integral quantity in the vibration low-frequency component database with a set standard, and giving an alarm when the low-frequency component integral quantity exceeds the standard. By monitoring vibration signals, the system can be systematically applied to wind turbine generator tower drum connecting bolts, especially connecting bolts of high tower drums and ultrahigh tower drums, bolt states can be monitored in real time, bolt looseness can be found in time, and early warning can be sent to related personnel. And a better protection effect can be achieved, safe operation of the wind power plant is effectively guaranteed, and economic losses caused by accidents are reduced.
Description
technical field [0001] The invention belongs to the technical field of fan monitoring, and in particular relates to a method for monitoring the state of tower tube bolts. Background technique [0002] With the large-scale development and utilization of wind energy resources on the road, the development speed of wind turbines in the direction of tall towers and large diameters has been further accelerated. At present, the mainstream hub height has reached 120, 140m, and even 160m. Fans of this height class are subjected to very different forces under different wind speeds. Coupled with the impact of loads caused by the rotation of the three blades of the fan, the tower is subjected to unstable impact loads. The bolts connected to each section of the tower tube have been running for a long time under the action of this variable load stress. The phenomenon of bolt loosening is more serious, and even fatigue fractures may occur. safety accidents and economic losses. Therefore...
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IPC IPC(8): F03D17/00
CPCY02P70/50
Inventor 沙德生李芊邹歆梁宴萱徐景悦高开峰
Owner HUANENG CLEAN ENERGY RES INST