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Bolt pre-tightening device and bolt tightening method on draught fan tower barrel

A technology for fan towers and bolts, applied in the direction of torque/torsional force measurement, metal processing, metal processing equipment, etc. during tightening, can solve problems such as time-consuming and energy-consuming, economic loss, and bolt loosening, and reduce the intensity of manual labor. , Guarantee reliability, solve the effect of time-consuming and laborious and inaccurate detection

Inactive Publication Date: 2017-07-07
BEIJING PUHUA YINENG WIND POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The tower tube of a wind turbine is generally assembled by multiple tube sections, and two adjacent tube sections are fixedly connected by high-strength bolts. Generally, the service life of large wind turbines is about twenty years. During the process, due to the continuous wind force and the vibration generated by its own operation, the bolts at the connection of the tower are prone to loosening. Therefore, maintenance personnel are required to enter the tower regularly to test and tighten the connecting bolts. There are a large number of bolts at the connection, and it takes a lot of time and energy to repair manually, and the maintenance personnel need to climb the tower continuously, which is dangerous, especially in some natural disaster weather, the maintenance personnel cannot enter the tower in time At this time, once the tower connecting bolts loosen, it is easy to cause damage to the entire fan, resulting in huge economic losses

Method used

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  • Bolt pre-tightening device and bolt tightening method on draught fan tower barrel
  • Bolt pre-tightening device and bolt tightening method on draught fan tower barrel
  • Bolt pre-tightening device and bolt tightening method on draught fan tower barrel

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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a bolt pre-tightening device on a wind turbine tower includes a stress detection device installed at the joint of the tower 1 and a bolt tightening device. The stress detection device includes a plurality of The pressure sensor 6, the pressure sensor 6 is arranged on the side where the end of the bolt 2 is in contact with the tower tube 1, and the bolt 2 is pressed against the surface of the tower tube 1 to detect the pressure between the bolt 2 and the tower tube 1 ; The pressure sensor 6 is connected with the bolt tightening device to generate electrical signals for controlling the action of the bolt tightening device. When the detection value of the pressure sensor 6 is less than the set value, the bolt tightening device works to tighten the bolts, and when the detection value of the pressure sensor 6 is equal to or greater than the set value, the bolt tightening device stops working. The bolt tightening device includes a hydraulic wrench ...

Embodiment 2

[0047] Such as Figure 5 and Figure 6 As shown, the difference between the present embodiment and the first embodiment is that the connection mode between the electric pump 5 and the hydraulic wrench 4 of the present embodiment is different from that of the first embodiment, and correspondingly, the tightening method of the bolt 2 is also different. Specifically, the electric pump 5 is connected to each hydraulic wrench 4 through the main oil supply pipe and the main oil return pipe. The main oil supply pipe and the main oil return pipe are double high-pressure oil pipes. There are multiple interfaces, and each interface is correspondingly connected with a hydraulic wrench 4 , that is, each hydraulic wrench 4 is supplied with oil by the electric pump 5 at the same time.

[0048] Since the bolts 2 at the joints of each tower tube 1 have the same specifications and rated torque values, the method of simultaneously supplying oil to each hydraulic wrench 4 by the electric pump 5...

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Abstract

The invention relates to a bolt pre-tightening device on a draught fan tower barrel. The bolt pre-tightening device comprises a stress detection device and a bolt tightening device which are installed in the tower barrel connection position. The stress detection device comprises a plurality of pressure sensors which are arranged in the circumferential direction of the tower barrel. The pressure sensors are arranged on the sides, making contact with the tower barrel, of the ends of bolts. The pressure sensors are connected with the bolt tightening device so as to produce electric signals for controlling the bolt tightening device to act. The invention further relates to a bolt tightening method on the draught fan tower barrel. The numerical value of the pressure sensors is detected, and the blots are tightened through automatic control. According to the bolt pre-tightening device and bolt tightening method on the draught fan tower barrel, the tower barrel connection bolts are monitored in real time, the loose bolts can be tightened in time, thus, the draught fan tower barrel connection stability is greatly improved, and the labor burden of overhauling personnel is eased.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a bolt pre-tightening device on a fan tower. Background technique [0002] The tower tube of a wind turbine is generally assembled by multiple tube sections, and two adjacent tube sections are fixedly connected by high-strength bolts. Generally, the service life of large wind turbines is about twenty years. During the process, due to the continuous wind force and the vibration generated by its own operation, the bolts at the connection of the tower are prone to loosening. Therefore, maintenance personnel are required to enter the tower regularly to test and tighten the connecting bolts. There are a large number of bolts at the connection, and it takes a lot of time and energy to repair manually, and the maintenance personnel need to climb the tower continuously, which is dangerous, especially in some natural disaster weather, the maintenance personnel cannot enter the tower i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P19/06G01L5/24
CPCB23P19/069G01L5/24
Inventor 刘峰鲁志平张羽尹子栋程学文冯克瑞
Owner BEIJING PUHUA YINENG WIND POWER TECH
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