CN114517804A - Device capable of effectively preventing bolt from being broken due to fatigue damage - Google Patents
Device capable of effectively preventing bolt from being broken due to fatigue damage Download PDFInfo
- Publication number
- CN114517804A CN114517804A CN202210150812.9A CN202210150812A CN114517804A CN 114517804 A CN114517804 A CN 114517804A CN 202210150812 A CN202210150812 A CN 202210150812A CN 114517804 A CN114517804 A CN 114517804A
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- CN
- China
- Prior art keywords
- fatigue
- column
- bolt
- sleeve
- flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002929 anti-fatigue Effects 0.000 claims abstract description 49
- 230000003449 preventive effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
The invention discloses a device capable of effectively preventing a bolt from being broken due to fatigue failure, which is designed by separating two heavy tasks of fastening and bearing alternating load borne by the bolt, wherein the two heavy tasks are mainly borne by the bolt respectively, and an anti-fatigue column is mainly borne by the alternating load, so that the problem of the bolt breaking due to fatigue failure caused by strong alternating load is effectively and thoroughly solved. The anti-fatigue column is a polished rod without any structural change and tool marks; and the diameter is larger than the diameter of the bolt, so that the strong alternating load effect can be effectively resisted, and the bolt is not broken when in work.
Description
Technical Field
The invention belongs to the technical field of mechanical devices, and particularly relates to a device capable of effectively preventing a bolt from being broken due to fatigue damage.
Background
The bolt connection is a widely used connection form in mechanical manufacturing, mechanical equipment installation and engineering structural parts. The bolt connection has the advantages of simple structure, reliable fastening, convenient assembly and disassembly, easy adjustment and the like. However, the bolt belongs to a fastening body, has threads on the structure, has structural bulge change, is easy to generate stress concentration phenomenon, has larger stress concentration coefficient, and inevitably generates the stress concentration phenomenon when being subjected to strong alternating load, and the bolt is broken under serious conditions, thereby causing serious economic loss. In the field of wind power generation, the wind power generator tower often collapses due to the fact that bolts break off due to fatigue of connecting bolts under a normal working state.
In the technical field of wind power, along with the improvement of science and technology and the requirement of reducing the electricity consumption cost, the power of a wind driven generator is increased more and more, the power of the generator is increased by about ten times at present, the alternating load born by a connecting bolt is increased according to a larger proportion, the connection mode of the bolt used only at present is not changed, the hidden danger of collapse of the wind tower caused by the breakage of the wind tower due to the fatigue damage of the bolt is more and more serious, and the device just solves the important hidden danger.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a device capable of effectively preventing a bolt from being broken due to fatigue damage, so as to solve the problems in the background art, and enable the bolt to meet the requirement of heavy load without generating fatigue fracture.
In order to achieve the purpose, the invention adopts the following technical means:
a device capable of effectively preventing a bolt from being broken due to fatigue damage comprises an anti-fatigue column, an upper flange, a lower flange, a bolt, a nut, a sleeve and an interference ring, wherein the anti-fatigue column is fastened on the interference ring, the upper flange and the lower flange are connected by the bolt and the nut, and the anti-fatigue column penetrates through a hole which is pre-opened by the upper flange and the lower flange; the sleeve is arranged on the upper portion of the anti-fatigue column and clings to the upper flange, the sleeve is fixedly connected with the upper flange, the sleeve is in gapless fit with the anti-fatigue column, and the interference ring is arranged below the lower flange and is fixedly connected with the lower flange.
The anti-fatigue column is a smooth cylinder.
The anti-fatigue column is made of alloy steel.
The anti-fatigue column has the hardness of HRC45-50 and the surface roughness of Ra0.4-0.8.
The overall dimension of the anti-fatigue column is larger than that of the bolt.
The upper flange, the lower flange, the interference ring and the sleeve are made of the same material.
The gap between the anti-fatigue column and the upper and lower flanges is smaller than the gap between the bolt and the flange.
The method for installing the device capable of effectively preventing the bolt from being broken due to fatigue damage comprises the following steps:
firstly, the anti-fatigue column is fastened on the interference ring;
secondly, fastening the upper flange and the lower flange by using bolts and nuts;
thirdly, the anti-fatigue column penetrates through preset holes of the upper flange and the lower flange;
fourthly, sleeving the sleeve into the anti-fatigue column, and enabling the sleeve to be close to the upper flange;
and (V) firmly connecting the interference ring with the lower flange and the sleeve with the upper flange.
The beneficial effects obtained by the invention are as follows:
1. the device has the advantages of simple structure, easy processing, convenient installation and easy operation.
2. The anti-fatigue column is in interference fit with the interference ring and is in zero clearance fit with the sleeve, so that the anti-fatigue column is guaranteed to have no structural change and no machining tool mark, and the anti-fatigue column is guaranteed not to generate stress concentration phenomenon when bearing strong alternating load.
3. The anti-fatigue column is designed to be larger than the diameter of the bolt, and ensures enough strength to resist strong alternating load. The clearance between the anti-fatigue column and the upper and lower flanges is smaller than that between the bolt and the flange, so that the anti-fatigue column can bear strong alternating load.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention.
Fig. 2 is a schematic structural view of the fatigue preventive column.
Fig. 3 is a schematic diagram of the structure of the interference ring.
Fig. 4 is a schematic view of the structure of the sleeve.
In the figure, 1 is an anti-fatigue column, 2 is a sleeve, 3 is a jamming ring, 4 is an upper flange, 5 is a lower flange, 6 is a nut, and 7 is a bolt.
Detailed Description
The invention is described below with reference to the accompanying drawings:
example 1
The embodiment is an embodiment of a device capable of effectively preventing a bolt from being broken due to fatigue failure.
As shown in fig. 1 to 4, the anti-fatigue column is a smooth cylinder, the anti-fatigue column is fastened on the interference ring, and the anti-fatigue column is in interference fit with the interference ring.
The upper flange and the lower flange are connected and fastened by bolts and nuts, and the anti-fatigue column penetrates through holes which are pre-opened in the upper flange and the lower flange.
The sleeve is arranged at the upper part of the anti-fatigue column and is attached to the upper flange, and the sleeve is in clearance-free fit with the anti-fatigue column.
The lower flange and the interference ring are fixed together in a welding mode.
The upper flange and the sleeve are fixed together in a welding mode.
The anti-fatigue column is a smooth cylinder to eliminate the problem of stress concentration, and is not limited to a smooth cylinder in the case that the anti-fatigue column can bear enough force. The anti-fatigue column has the hardness of HRC45-50, so that the anti-fatigue column can not be suddenly broken. The anti-fatigue column is selected from the surface roughness Ra0.4-0.8, so as to reduce the structure cutter mark and further cause stress concentration. The anti-fatigue column can be set to be larger than the bolt according to the requirement, and the anti-fatigue column is a smooth cylinder and is easy to process.
The upper flange, the lower flange, the interference stopping ring and the sleeve are made of the same material, so that welding is firmer.
The clearance between the anti-fatigue column and the upper flange and the clearance between the anti-fatigue column and the lower flange are smaller than the clearance between the bolt and the flange, so that alternating load can be mainly acted on the anti-fatigue column, and the acting force on the bolt is reduced.
Example 2
The embodiment is an embodiment of a method for installing a device capable of effectively preventing a bolt from being broken due to fatigue failure.
In the first step, the anti-fatigue column is fastened on the interference ring.
Secondly, fastening the upper flange and the lower flange by using bolts and nuts;
and thirdly, penetrating the anti-fatigue column through preset holes of the upper flange and the lower flange.
And fourthly, sleeving the sleeve into the anti-fatigue column, and enabling the sleeve to be close to the upper flange.
Fifthly, firmly connecting the interference ring with the lower flange, the sleeve and the upper flange: and welding and fixing the interference ring, the lower flange and the sleeve with the upper flange along the periphery.
In addition, the diameter and the number of the bolts are large and small; the diameter and the number of the anti-fatigue columns can be determined according to the size of the load-bearing working load.
The working principle of the invention is as follows: the two heavy work tasks of fastening and alternating load bearing of the bolt are separated, the bolt is mainly responsible for the fastening task, and the anti-fatigue column is mainly used for bearing the alternating load.
Claims (8)
1. A device capable of effectively preventing a bolt from being broken due to fatigue damage is characterized by comprising a fatigue-preventing column, an upper flange, a lower flange, a bolt, a nut, a sleeve and a jamming ring, wherein the upper flange and the lower flange are connected by the bolt and the nut, and the fatigue-preventing column penetrates through a hole which is formed in advance by the upper flange and the lower flange; the sleeve is arranged on the upper portion of the anti-fatigue column and clings to the upper flange, the sleeve is fixedly connected with the upper flange, the sleeve is in gapless fit with the anti-fatigue column, the interference ring is arranged below the lower flange and is fixedly connected with the lower flange, and the anti-fatigue column is fastened on the interference ring.
2. The apparatus as claimed in claim 1, wherein the gap between the fatigue preventive column and the upper and lower flanges is smaller than the gap between the bolt and the flange.
3. The apparatus as claimed in claim 1, wherein the fatigue preventive post is a smooth cylinder.
4. The apparatus as claimed in claim 1, wherein the fatigue preventive column is made of alloy steel.
5. The device for preventing the bolt from being broken due to fatigue failure as claimed in claim 1, wherein the fatigue preventing column has a hardness of HRC45-50 and a surface roughness of Ra0.4-0.8.
6. The apparatus as claimed in claim 1, wherein the fatigue preventive column has a larger outer dimension than the bolt.
7. The device of claim 1, wherein the upper flange, the lower flange, the interference ring and the sleeve are made of the same material.
8. A method of installing the device for preventing the bolt from breaking due to fatigue failure according to claim 1, comprising the steps of:
The anti-fatigue column is fastened on the interference ring;
secondly, fastening the upper flange and the lower flange by using bolts and nuts;
thirdly, the anti-fatigue column penetrates through preset holes of the upper flange and the lower flange;
fourthly, sleeving the sleeve into the anti-fatigue column, and enabling the sleeve to be close to the upper flange;
and (V) firmly connecting the interference ring with the lower flange and the sleeve with the upper flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210150812.9A CN114517804B (en) | 2022-02-14 | 2022-02-14 | Device capable of effectively preventing bolt from being broken due to fatigue damage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210150812.9A CN114517804B (en) | 2022-02-14 | 2022-02-14 | Device capable of effectively preventing bolt from being broken due to fatigue damage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114517804A true CN114517804A (en) | 2022-05-20 |
| CN114517804B CN114517804B (en) | 2024-01-26 |
Family
ID=81599271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210150812.9A Active CN114517804B (en) | 2022-02-14 | 2022-02-14 | Device capable of effectively preventing bolt from being broken due to fatigue damage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114517804B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4480513A (en) * | 1981-11-16 | 1984-11-06 | Mcgard, Inc. | Bolt-lock structure |
| DE4214747A1 (en) * | 1992-05-04 | 1993-11-11 | Henkel Kgaa | Flange connection with seal between two outer flanges - has threaded bore in at least one flange to take force screw for supporting counter flange |
| JP2007069746A (en) * | 2005-09-07 | 2007-03-22 | Nsk Ltd | Bearing unit |
| US20110194797A1 (en) * | 2008-10-23 | 2011-08-11 | Ntn Corporation | Wheel Bearing Apparatus For A Vehicle |
| JP2011213466A (en) * | 2010-04-01 | 2011-10-27 | Hitachi Constr Mach Co Ltd | Working machine |
| CN203894040U (en) * | 2014-05-14 | 2014-10-22 | 广西桂冠电力股份有限公司大化水力发电总厂 | Apparatus for detecting fastening occlusion case of large-scale bolt and large-scale nut |
| CN205504277U (en) * | 2016-03-28 | 2016-08-24 | 姜增国 | Flange bolt prevents protection device that collapses |
| CN205578191U (en) * | 2016-04-28 | 2016-09-14 | 湖南科技大学 | Prevent structure of fan tower section of thick bamboo bolt shearing |
| CN205822301U (en) * | 2016-06-30 | 2016-12-21 | 徐州徐工筑路机械有限公司 | A kind of floating type latch installing mechanism |
| CN206572094U (en) * | 2017-03-06 | 2017-10-20 | 西京学院 | A kind of spliced ring flange |
| CN206718882U (en) * | 2017-01-23 | 2017-12-08 | 长城汽车股份有限公司 | Wheel ring flange and hub for vehicle wheel structure |
-
2022
- 2022-02-14 CN CN202210150812.9A patent/CN114517804B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4480513A (en) * | 1981-11-16 | 1984-11-06 | Mcgard, Inc. | Bolt-lock structure |
| DE4214747A1 (en) * | 1992-05-04 | 1993-11-11 | Henkel Kgaa | Flange connection with seal between two outer flanges - has threaded bore in at least one flange to take force screw for supporting counter flange |
| JP2007069746A (en) * | 2005-09-07 | 2007-03-22 | Nsk Ltd | Bearing unit |
| US20110194797A1 (en) * | 2008-10-23 | 2011-08-11 | Ntn Corporation | Wheel Bearing Apparatus For A Vehicle |
| JP2011213466A (en) * | 2010-04-01 | 2011-10-27 | Hitachi Constr Mach Co Ltd | Working machine |
| CN203894040U (en) * | 2014-05-14 | 2014-10-22 | 广西桂冠电力股份有限公司大化水力发电总厂 | Apparatus for detecting fastening occlusion case of large-scale bolt and large-scale nut |
| CN205504277U (en) * | 2016-03-28 | 2016-08-24 | 姜增国 | Flange bolt prevents protection device that collapses |
| CN205578191U (en) * | 2016-04-28 | 2016-09-14 | 湖南科技大学 | Prevent structure of fan tower section of thick bamboo bolt shearing |
| CN205822301U (en) * | 2016-06-30 | 2016-12-21 | 徐州徐工筑路机械有限公司 | A kind of floating type latch installing mechanism |
| CN206718882U (en) * | 2017-01-23 | 2017-12-08 | 长城汽车股份有限公司 | Wheel ring flange and hub for vehicle wheel structure |
| CN206572094U (en) * | 2017-03-06 | 2017-10-20 | 西京学院 | A kind of spliced ring flange |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114517804B (en) | 2024-01-26 |
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