CN105485123A - Hydraulic fitting bolt - Google Patents
Hydraulic fitting bolt Download PDFInfo
- Publication number
- CN105485123A CN105485123A CN201410480449.2A CN201410480449A CN105485123A CN 105485123 A CN105485123 A CN 105485123A CN 201410480449 A CN201410480449 A CN 201410480449A CN 105485123 A CN105485123 A CN 105485123A
- Authority
- CN
- China
- Prior art keywords
- lining
- bolt
- bolt rod
- bolt shank
- hydraulic fitting
- 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.)
- Pending
Links
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008961 swelling Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Clamps And Clips (AREA)
Abstract
The invention relates to a hydraulic fitting bolt. The hydraulic fitting bolt comprises a bolt rod and a nut arranged on the periphery of the bolt rod in a sleeving manner; the two ends of the bolt rod are provided with threaded chamfers with taper, a lining is arranged in the middle portion of the bolt rod, and a swelling threaded chamfer with an inner conical surface is arranged in the lining in a surrounding manner; and the surface of the lining and the outer surface of the bolt rod are used in a matched manner through circular conical surfaces, an oil nozzle is formed in one end of the bolt rod, the lining and the bolt rod are in a clearance-free fit state, and a groove is formed between the bolt rod and the lining. After the structure is adopted, when an opposite action force is applied to the bolt rod and the lining in the axial direction, radial stress which is amplified by multiple times will be generated on the lining through the matched circular conical surfaces, the amplitude of the fastening force can be accurately controlled by the oil pressure of an adjusting piston, the total pressure and the pressure distribution uniformity of an overall coupler can be guaranteed, automatic correction of alignment results of the center of the coupler can be carried out, the installation accuracy is guaranteed, and the magnitude of interference can be effectively controlled.
Description
Technical field
The present invention relates to a kind of hydraulic fitting bolt, refer more particularly to a kind of Novel bolt on flange coupling.
Background technique
At present, interference fit or transition fit often between traditional fitting-up bolt and hole, bolt needs to make freezing processing before installing, bolt is shunk, along with temperature raises, bolt expands just tightly swollen with hole, if when maintenance or fitting-up bolt are dismantled, Bolt dismantling inconvenience, it must be taken out from hole by special tool(s) or in the mode of knocking, operating process is slow, and the drive fit face of the bolt after dismounting and hole have wearing and tearing, burnt out by fitting surface, bolt easily causes to scrap and again makes.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of convenient disassembly, not easy to wear, can reuse and the hydraulic fitting bolt that hole and bolt are not damaged.
In order to solve the problems of the technologies described above, the invention provides a kind of hydraulic fitting bolt, it comprises bolt shank and is set in the nut of bolt shank periphery, described bolt shank two ends are provided with the screw thread chamfering with tapering, lining is provided with in the middle part of described bolt shank, the screw thread chamfering of the band inner conical surface that can swell is arranged with in described lining, described sleeve surface and bolt shank outer surface by conical surface with the use of, one end of described bolt shank is provided with oil nozzle, described lining and bolt shank are blind-mate state, are provided with groove between described bolt shank and lining.
Described bolt shank is arranged on the shaft coupling of marine shafting, and is fixed on shaft coupling by bolt shank by nut.
Compared with prior art, advantage of the present invention is:
By the bolt shank of appearance with the screw thread chamfering of tapering, endoporus is with the lining of corresponding tapering and locknut composition, hydraulic bolt is similar to EXPANSION ANCHOR BOLTS, lining is provided with in the middle part of described bolt shank, the screw thread chamfering of the band inner conical surface that can swell is arranged with in described lining, sleeve surface and the outer surface of hydraulic bolt are that the conical surface that tapering is identical coordinates, when when applying an opposite effect power axially to bolt shank and lining, the conical surface that will be cooperatively interacted by it produces a radial stress expanded many times to lining, the size of fastening force can very accurately control by adjusting piston oil pressure, the total pressure of whole coupling and the even of pressure distribution can be ensured, described lining and bolt shank are blind-mate state, can to coupling center centering result auto modification, guarantee installation precision and effectively can control magnitude of interference.
The design of hydraulic tensioning fitting-up bolt overcomes drawback, stretching fitting-up bolt bar is in close-fitting state under operating conditions, in a free state, lining is outer little through the internal diameter than matching hole, bolt shank does not need extra process to put into hole together with lining, in dismounting, only use takes a few minutes detachable complete set bolt assembly, damages bolt shank and Kong Junwu.
Accompanying drawing explanation
Fig. 1 is the structural representation of hydraulic fitting bolt of the present invention.
Fig. 2 is hydraulic fitting bolt erection drawing of the present invention.
Embodiment
As shown in Figure 1-2, a kind of hydraulic fitting bolt, it comprises bolt shank 1 and is set in the nut 2 of bolt shank 1 periphery, described bolt shank 1 two ends are provided with the screw thread chamfering with tapering, lining 3 is provided with in the middle part of described bolt shank 1, the screw thread chamfering of the band inner conical surface that can swell is arranged with in described lining 3, described lining 3 surface and bolt shank 1 outer surface by conical surface with the use of, one end of described bolt shank 1 is provided with oil nozzle 4, described lining 3 is blind-mate state with bolt shank 1, is provided with groove 6 between described bolt shank 1 and lining 3; Described bolt shank 1 is arranged on the shaft coupling 5 of marine shafting, and is fixed on shaft coupling 5 by bolt shank 1 by nut 2.
First, first interstage bushing 3 is put into mating holes, lining 3 endoporus small end should be consistent with draw direction, in lining 3, bolt shank 1 is loaded again from opposite side, implement the axial tension of bolt in tapered sleeve endoporus, the radial dilatation of tapered sleeve cylindrical in the middle of being formed, in the middle of after its axial dimension should ensure to stretch, tapered sleeve is in flange group neutral position, and the Gewindefreistiche of bolt is exposed at outside end face of flange after avoiding stretching, complete the axial tension of bolt, nut 2 pretension can be carried out, when i.e. fastening nut after pressure increase to design load, thereafter release, screw thread shortens, nut 2 i.e. pretension.
Hydraulic tensioning fitting-up bolt, coordinate with interstage bushing 3 by there being the screw thread chamfering of tapering in the middle part of bolt shank 1, by axial hydraulic expansive force, bolt shank 1 is strained to small end, squeeze swollen by bolt shank 1 in the middle part of it, lining 3 is expanded, and its outer round surface contacts with bolt hole internal surface and swelling, after cancelling the hydraulic buckling to bolt, bolt, under the effect of axial elasticity restoring force, makes nut tightening.
Sleeve surface and the outer surface of hydraulic bolt are that the conical surface that tapering is identical coordinates, when when applying an opposite effect power axially to bolt shank and lining, the conical surface that will be cooperatively interacted by it produces a radial stress expanded many times to lining, the size of fastening force can very accurately control by adjusting piston oil pressure, the total pressure of whole coupling and the even of pressure distribution can be ensured, described lining and bolt shank are blind-mate state, to coupling center centering result auto modification, installation precision can be guaranteed and effectively can control magnitude of interference.
Claims (3)
1. a hydraulic fitting bolt, it is characterized in that: it comprises bolt shank (1) and is set in the peripheral nut (2) of bolt shank (1), described bolt shank (1) two ends are provided with the screw thread chamfering with tapering, described bolt shank (1) middle part is provided with lining (3), the screw thread chamfering of the band inner conical surface that can swell is arranged with in described lining (3), described lining (3) surface with bolt shank (1) outer surface by conical surface with the use of, one end of described bolt shank (1) is provided with oil nozzle (4), and described lining (3) and bolt shank (1) are blind-mate state.
2. hydraulic fitting bolt according to claim 1, is characterized in that: described bolt shank (1) is arranged on the shaft coupling (5) of marine shafting, and is fixed on shaft coupling (5) by bolt shank (1) by nut (2).
3. hydraulic fitting bolt according to claim 1, is characterized in that: be provided with groove (6) between described bolt shank (1) and lining (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410480449.2A CN105485123A (en) | 2014-09-19 | 2014-09-19 | Hydraulic fitting bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410480449.2A CN105485123A (en) | 2014-09-19 | 2014-09-19 | Hydraulic fitting bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105485123A true CN105485123A (en) | 2016-04-13 |
Family
ID=55672326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410480449.2A Pending CN105485123A (en) | 2014-09-19 | 2014-09-19 | Hydraulic fitting bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105485123A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999859A (en) * | 2018-07-26 | 2018-12-14 | 河北国源电气股份有限公司 | A kind of shaft coupling hydraulic bolt and its application method |
| CN109764042A (en) * | 2018-11-23 | 2019-05-17 | 宁波凯荣船用机械有限公司 | Slotted hydraulic expansion bolt and method of using the same |
-
2014
- 2014-09-19 CN CN201410480449.2A patent/CN105485123A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999859A (en) * | 2018-07-26 | 2018-12-14 | 河北国源电气股份有限公司 | A kind of shaft coupling hydraulic bolt and its application method |
| CN109764042A (en) * | 2018-11-23 | 2019-05-17 | 宁波凯荣船用机械有限公司 | Slotted hydraulic expansion bolt and method of using the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |
|
| WD01 | Invention patent application deemed withdrawn after publication |