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Device for monitoring pre-tightening force of net-shaped bolt of fan

A bolt pre-tightening force and monitoring device technology, applied in the direction of measuring torque/torsional force, signal transmission system, instrument, etc. during tightening, can solve the problems of high measurement accuracy, high cost, and unsuitable for mass promotion

Active Publication Date: 2021-06-29
北京英华达电力电子工程科技有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] The above schemes require high measurement accuracy and require the use of sophisticated measuring instruments, and the bolt angle on the flange. The current scheme can only monitor 10% to 30% of the bolts on the same flange. If all the bolts are monitored, High cost, not suitable for mass promotion

Method used

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  • Device for monitoring pre-tightening force of net-shaped bolt of fan
  • Device for monitoring pre-tightening force of net-shaped bolt of fan
  • Device for monitoring pre-tightening force of net-shaped bolt of fan

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Embodiment Construction

[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0026] The terms "comprising" and "having" and any variations thereof in the description, embodiments, claims and drawings of the present invention are intended to cover non-exclusive inclusion, for example, including a series of steps or units.

[0027] The technical solutions of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0028] Such as Figure ...

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Abstract

The invention relates to a fan net-shaped bolt pre-tightening force monitoring device which comprises a pre-tightening force collecting station, N pull rings and N pre-tightening force trigger lines arranged in a net shape. The pre-tightening force acquisition station comprises a signal acquisition layer and N stress sensors, and the N stress sensors are circumferentially distributed; each stress sensor comprises a closed loop composed of a power supply, a fixed resistor, a slide rheostat, a spring and a galvanometer, the first end of the spring is connected with the sliding end of the slide rheostat, and the second end of the spring is connected with the galvanometer; the second ends of all the springs are fixed at the central point of the pre-tightening force acquisition station; the first end of each spring is further connected with a pull ring through a pre-tightening force trigger line, and the pull rings are fixed to the bolts. The signal acquisition layer collects the readings of all the galvanometers and stores the numbers of all the bolts. According to the invention, all bolt loosening conditions on the flange plate can be monitored, which bolt is loosened can be accurately positioned, and the number of turns of loosening of the bolt can be evaluated.

Description

technical field [0001] The invention relates to the field of anti-loosening bolts, in particular to a monitoring device for the pretightening force of mesh bolts of a fan. Background technique [0002] Wind turbines have been operating under complex working conditions in harsh environments for a long time, and as a large-scale assembly product, bolt connection is the main connection method between various components. Under the action of complex loads such as long-term vibration and bending moment, the connecting fasteners between various parts will be damaged to varying degrees. The size and dispersion of the pre-tightening force value after the bolt connection directly determine the load transmission and operation safety of the unit. If the pre-tightening force of the bolts does not reach the specified size, the bolts are prone to loosen due to the alternating load of the wind turbine, increasing the wind turbine load. Dangers of large unit operation. [0003] The way to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/24G08C17/02
CPCG01L5/24G08C17/02Y02E10/72
Inventor 吴仕明张云峰陆江
Owner 北京英华达电力电子工程科技有限公司
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