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Device capable of effectively preventing bolt from being broken due to fatigue failure

A fatigue damage and anti-fatigue technology, applied in bolts, nuts, wind power generation, etc., can solve the problems of bolt breakage, easy stress concentration, and structural bulge changes.

Pending Publication Date: 2022-05-20
陈国强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because it belongs to the fastening body, has threads on the structure, has structural convex changes, is prone to stress concentration, and has a large stress concentration factor. When subjected to strong alternating loads, stress concentration will inevitably occur. Serious If the situation occurs, the bolts will break, causing serious economic losses.

Method used

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  • Device capable of effectively preventing bolt from being broken due to fatigue failure
  • Device capable of effectively preventing bolt from being broken due to fatigue failure
  • Device capable of effectively preventing bolt from being broken due to fatigue failure

Examples

Experimental program
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Effect test

Embodiment 1

[0030] This embodiment is an embodiment of a device that can effectively prevent bolts from breaking due to fatigue damage.

[0031] Such as Figure 1 ~ Figure 4 As shown, the anti-fatigue post is a smooth cylinder, and the anti-fatigue post is fastened on the profit stop ring, and the anti-fatigue post and the stop ring have an interference fit.

[0032] The upper flange and the lower flange are fastened with bolts and nuts, and the anti-fatigue column passes through the pre-opened holes of the upper flange and the lower flange.

[0033] The sleeve is arranged on the upper part of the anti-fatigue column and sticks to the upper flange, and there is no gap between the sleeve and the anti-fatigue column.

[0034] The lower flange and the stop ring are fixed together by welding.

[0035] The upper flange and the sleeve are fixed together by welding.

[0036] The purpose of setting the anti-fatigue column as a smooth cylinder is to eliminate the problem of stress concentration...

Embodiment 2

[0040] This embodiment is an embodiment of an installation method of a device that can effectively prevent bolts from being broken due to fatigue damage.

[0041] In the first step, the anti-fatigue column is fastened to the stop ring.

[0042] The second step is to fasten the upper flange and the lower flange with bolts and nuts;

[0043] The third step is to pass the anti-fatigue column through the preset holes of the upper flange and the lower flange.

[0044] The fourth step is to put the sleeve into the anti-fatigue column, and put the sleeve close to the upper flange.

[0045] The fifth step is to firmly connect the stop ring with the lower flange, the sleeve and the upper flange: weld the stop ring with the lower flange, the sleeve and the upper flange along the periphery.

[0046] In addition, the diameter and number of bolts; and the diameter and number of anti-fatigue columns can be determined according to the size of the bearing working load.

[0047] The working...

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Abstract

The invention discloses a device capable of effectively preventing a bolt from being fractured due to fatigue, and the design thought of the device is that two heavy tasks of fastening borne by the bolt and alternating load borne by the bolt are separated, the bolt mainly bears the fastening task, an anti-fatigue column mainly bears the alternating load task, and the anti-fatigue column mainly bears the alternating load task. The device for preventing the bolt from being broken due to fatigue damage effectively and thoroughly solves the problem that the bolt is subjected to strong alternating load and is broken due to fatigue damage. The device for preventing the bolt from being broken due to fatigue damage is mainly composed of an anti-fatigue column, a sleeve and an interference stopping ring. The anti-fatigue column is a polished rod without any structural change and tool marks; and the diameter of the bolt is larger than that of the bolt, so that the bolt can effectively resist strong alternating load, and the bolt is prevented from being broken during working.

Description

technical field [0001] The invention belongs to the technical field of mechanical devices, in particular to a device capable of effectively preventing bolts from breaking due to fatigue damage. Background technique [0002] Bolt connection is a widely used connection form in machinery manufacturing, mechanical equipment installation, and engineering structural parts. Bolt connection has the advantages of simple structure, reliable fastening, convenient disassembly and assembly, and easy adjustment. However, because it belongs to the fastening body, has threads on the structure, has structural convex changes, is prone to stress concentration, and has a large stress concentration factor. When subjected to strong alternating loads, stress concentration will inevitably occur. Serious In the worst case, the bolts will break off, causing serious economic losses. In the field of wind power generation, it is often the case that the wind turbine tower collapses due to the fatigue o...

Claims

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Application Information

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IPC IPC(8): F16B41/00F16B5/02
CPCF16B41/00F16B5/02Y02E10/728
Inventor 陈国强
Owner 陈国强
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