CN114517804B - 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
- CN114517804B CN114517804B CN202210150812.9A CN202210150812A CN114517804B CN 114517804 B CN114517804 B CN 114517804B CN 202210150812 A CN202210150812 A CN 202210150812A CN 114517804 B CN114517804 B CN 114517804B
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- CN
- China
- Prior art keywords
- fatigue
- column
- bolt
- sleeve
- upper flange
- Prior art date
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- 230000002929 anti-fatigue Effects 0.000 claims abstract description 55
- 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
- 238000003466 welding Methods 0.000 description 4
- 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
- 238000010248 power generation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
-
- 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
-
- 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
Landscapes
- 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 fracture, which is designed in a way that two heavy tasks of fastening borne by the bolt and alternating load borne by the bolt are separated, the fastening tasks are mainly borne by the bolt respectively, and an anti-fatigue column mainly bears the alternating load tasks, so that the problem that the bolt is broken due to fatigue fracture caused by strong alternating load is effectively and thoroughly solved, and the device for preventing the bolt from being broken due to fatigue fracture mainly comprises the anti-fatigue column, a sleeve and a anti-interference ring. The anti-fatigue column is a polish rod without any structural change and tool mark; the diameter is larger than that of the bolt, so that the strong alternating load can be effectively resisted, and the bolt is ensured not to be broken when working.
Description
Technical Field
The invention belongs to the technical field of mechanical devices, and particularly relates to a device capable of effectively preventing bolts from being broken due to fatigue damage.
Background
Bolting is a widely used form of attachment in machinery, machinery equipment, and engineering structures. The bolt connection has the advantages of simple structure, reliable fastening, convenient disassembly and assembly, easy adjustment and the like. However, the screw bolt is characterized by being a solid body, being threaded on the structure, being provided with structural protrusions for changing, being easy to generate stress concentration phenomenon, having larger stress concentration coefficient, being unavoidable to generate stress concentration phenomenon when being subjected to strong alternating load, and being broken under serious conditions, thereby causing serious economic loss. In the field of wind power generation, there are cases where a wind power generator tower collapses due to bolt breakage caused by fatigue of a connecting bolt in a normal operating state.
In the technical field of wind power, along with the progress of technology and the requirement of reducing electricity cost, the power of a wind driven generator is increased by about ten times, the alternating load born by a connecting bolt is also increased according to a larger proportion, the existing single-use bolt connection mode is not changed, and the hidden danger of wind tower collapse caused by the breakage of the wind tower due to the fatigue failure of the bolt is increased more and more, so that the device of the invention exactly solves the great hidden danger.
Disclosure of Invention
The invention aims to provide a device capable of effectively preventing a bolt from being broken due to fatigue fracture, so as to solve the problems in the background art, and enable the bolt to adapt to the requirement of heavy load without producing fatigue fracture.
In order to achieve the above purpose, the invention adopts the following technical means:
the device comprises an anti-fatigue column, an upper flange, a lower flange, bolts, nuts, a sleeve and an anti-interference ring, wherein the anti-fatigue column is fastened on the anti-interference ring, the upper flange and the lower flange are connected by the bolts and the nuts, and the anti-fatigue column penetrates through holes formed in the upper flange and the lower flange in advance; the sleeve is arranged on the upper part of the anti-fatigue column and is attached to the upper flange, the sleeve is fixedly connected with the upper flange, the sleeve is in clearance-free fit with the anti-fatigue column, and the interference-free 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 fatigue-resistant column has the hardness of HRC45-50 and the surface roughness of Ra0.4-0.8.
The external dimension of the anti-fatigue column is larger than that of the bolt.
The upper flange, the lower flange, the anti-interference ring and the sleeve are made of the same material.
The gap between the anti-fatigue column and the upper flange and the gap between the anti-fatigue column and the lower flange are smaller than the gap between the bolts and the flanges.
The method for installing the device capable of effectively preventing the bolt from being broken due to fatigue fracture comprises the following steps:
the anti-fatigue column is fastened on the anti-interference ring;
secondly, fastening the upper flange and the lower flange by using bolts and nuts;
thirdly, the anti-fatigue column penetrates through a hole preset in the upper flange and the lower flange;
(IV) sleeving the sleeve into the anti-fatigue column, and attaching the sleeve to the upper flange;
and fifthly, firmly connecting the interference-preventing ring with the lower flange and firmly connecting 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 and the anti-interference ring are in interference fit and are in clearance fit with the sleeve, so that the anti-fatigue column is free of any structural change and any machining tool mark, and the anti-fatigue column is free of 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 that the anti-fatigue column has enough strength to resist strong alternating load. The gap between the anti-fatigue column and the upper and lower flanges is smaller than the gap between the bolts and the flanges, and the anti-fatigue column is ensured to bear the action of strong alternating load at first.
Drawings
Fig. 1 is a schematic view of the structure of the device of the present invention.
FIG. 2 is a schematic structural view of an anti-fatigue column.
Fig. 3 is a schematic structural view of the interference stop ring.
Fig. 4 is a schematic structural view of the sleeve.
In the figure, 1 is an anti-fatigue column, 2 is a sleeve, 3 is a stop 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 the bolt from being broken due to fatigue fracture.
As shown in fig. 1 to 4, the anti-fatigue post is a smooth cylinder, and is fastened on the anti-interference ring, and is in interference fit with the anti-interference ring.
The upper flange and the lower flange are connected and fastened by bolts and nuts, and the anti-fatigue column penetrates through the holes of the upper flange and the lower flange.
The sleeve is arranged on the upper part of the anti-fatigue column and is stuck to the upper flange, and the sleeve is in clearance fit with the anti-fatigue column.
The lower flange and the anti-interference ring are fixed together in a welding mode.
The upper flange and the sleeve are fixed together in a welding way.
The fatigue preventing column is provided as a smooth cylinder in order to eliminate the problem of stress concentration, and is not limited to a smooth cylinder in the case where the force that the fatigue preventing column can withstand is sufficiently large. The fatigue-resistant column adopts the hardness HRC45-50, so that the fatigue-resistant column is not broken suddenly. The fatigue-resistant column adopts the surface roughness Ra0.4-0.8 to reduce structural tool marks, thereby causing 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-preventing ring and the sleeve are made of the same material, so that welding is firmer.
The gaps between the anti-fatigue column and the upper flange and between the anti-fatigue column and the gaps between the anti-fatigue column and the lower flange are smaller than the gaps between the bolts and the flanges, so that alternating load can be mainly applied to the anti-fatigue column, and acting force on the bolts is reduced.
Example 2
The embodiment is an installation method embodiment of the device capable of effectively preventing the bolt from being broken due to fatigue fracture.
In the first step, the anti-fatigue column is fastened to the anti-interference ring.
Secondly, fastening the upper flange and the lower flange by using bolts and nuts;
and thirdly, enabling the anti-fatigue column to pass through a hole preset in the upper flange and the lower flange.
And fourthly, sleeving the sleeve into the anti-fatigue column, and attaching the sleeve to the upper flange.
Fifthly, firmly connecting the interference-preventing ring with the lower flange and firmly connecting the sleeve with the upper flange: and welding and fixing the interference-preventing ring and the lower flange, and the sleeve and the upper flange along the periphery.
In addition, the diameter and the number of the bolts are large; and the number of the anti-fatigue columns can be determined according to the size of the bearing working load.
The working principle of the invention is as follows: the bolt is mainly responsible for fastening tasks and the anti-fatigue column is mainly used for bearing alternating load.
Claims (5)
1. A device capable of effectively preventing bolts from being broken due to fatigue damage is characterized by comprising anti-fatigue device
Column, upper flange, lower flange, bolt, nut, sleeve and anti-interference ring, the upper flange and lower flange are screw-threaded
The bolt and the nut are connected, and the fatigue-preventing column passes through the hole which is opened in advance on the upper flange and the lower flange; the sleeve is arranged on the anti-fatigue column
The upper part is adhered to the upper flange, the sleeve is fixedly connected with the upper flange, and no gap exists between the sleeve and the anti-fatigue column
The anti-fatigue column is fastened on the anti-interference ring;
the gaps between the anti-fatigue column and the upper flange and between the anti-fatigue column and the anti-fatigue column between the anti-fatigue column and the lower flange are smaller than those between the anti-fatigue column and the bolts;
the anti-fatigue column is a smooth cylinder;
the external dimension of the anti-fatigue column is larger than that of the bolt.
2. The apparatus for preventing bolt breakage due to fatigue fracture according to claim 1, wherein said anti-fatigue column is made of alloy steel.
3. The apparatus for preventing bolt breakage due to fatigue fracture according to claim 1, wherein the fatigue-resistant column is of hardness HRC45-50 and surface roughness ra0.4-0.8.
4. The device for preventing bolt from being broken due to fatigue fracture according to claim 1, wherein the upper flange, the lower flange, the interference-preventing ring and the sleeve are made of the same material.
5. A method of installing the device for preventing the breakage of a bolt due to fatigue failure according to claim 1, comprising the steps of:
the anti-fatigue column is fastened on the anti-interference ring;
secondly, fastening the upper flange and the lower flange by using bolts and nuts;
thirdly, the anti-fatigue column penetrates through a hole preset in the upper flange and the lower flange;
(IV) sleeving the sleeve into the anti-fatigue column, and attaching the sleeve to the upper flange;
and fifthly, firmly connecting the interference-preventing ring with the lower flange and firmly connecting 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 CN114517804A (en) | 2022-05-20 |
| CN114517804B true 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 (10)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5752873B2 (en) * | 2008-10-23 | 2015-07-22 | Ntn株式会社 | Wheel bearing device |
-
2022
- 2022-02-14 CN CN202210150812.9A patent/CN114517804B/en active Active
Patent Citations (10)
| 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 |
| 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 |
|---|---|
| CN114517804A (en) | 2022-05-20 |
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