CN104235201A - Coupling bolt connection structure - Google Patents
Coupling bolt connection structure Download PDFInfo
- Publication number
- CN104235201A CN104235201A CN201410307898.7A CN201410307898A CN104235201A CN 104235201 A CN104235201 A CN 104235201A CN 201410307898 A CN201410307898 A CN 201410307898A CN 104235201 A CN104235201 A CN 104235201A
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- China
- Prior art keywords
- bolt
- nut
- coupling
- section
- coupling bolt
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention relates to a coupling bolt connection structure between flanges of steam turbine rotors. The coupling bolt connection structure comprises bolts penetratingly connected in coupling bolt holes. Each bolt comprises a swelling segment and connection segments, a bush connectively bushes the swelling segment of the bolt, nuts are connected to the connection segments at two ends of the bolt, and the outer circumference surface at one end of each nut is stepped. Each nut comprises a nut body and a nut supporting segment, the diameter of the nut supporting segment is smaller than that of the nut body, the nut supporting segment extends into the corresponding bolt hole, and the nut supporting segments at two ends of each bolt and the bush in the middle of the bolt form a support for the bolt. The coupling bolt connection structure has the advantages that the bolts can be supported effectively and stably, bending stress produced by large centrifugal force is overcome, and usage safety of a unit is improved while the service life of the unit is prolonged; the technical problems in the prior art of radial slip of the bolt connection structure, bolt connection failure and damage to the unit resulting from influence of centrifugal force caused by a high-rotating-speed condition are solved.
Description
Technical field
The present invention relates to a kind of bolt fastening structure, particularly relating to the coupling bolt structure between a kind of flange for connecting steam turbine different rotor.
Background technique
Individual in the practical application of steam turbine product extensively supporting in firepower power station and nuclear power station, all Flange joint form is adopted between the different rotor of same unit, often through shaft link bolt transmitting torque between different rotor flange, thus the final conversion driving generator amature to realize energy, obtain the electric energy needed.
And turbine rotor needs normality height rotating speed (3000 revs/min) running in 24 hours, the shaft link bolt worked under similarity condition, especially concerning hydraulic bolt, what adopt is that gapless interference fit connects, also be namely that interference fit is connected between lining and the bolt hole of steam turbine rotor coupling device, to realize better transmitting object that is high-power and moment of torsion.
As Chinese patent: hydraulic fitting bolt (CN201363354Y), comprise turnbuckle, the intermediate portion of turnbuckle is the screw rod with tapering, the two ends of turnbuckle are with the outside thread coordinated with locking nut, with on the screw rod of tapering, expansion tapered sleeve is being housed, expansion tapered sleeve inner circumferential is with the tapering corresponding to screw portion tapering.
But for condition restrictions such as different structures, the axial length of lining itself can not be isometric with coupling bolt hole, so in unit running process, the centrifugal force that powerful high rotating speed brings, the frictional force of nut end face can be caused to be not enough to the huge centrifugal force that contends with, and make bolt overhanging portion comprise end face nut generation radial slippage, thus bolt body is caused to produce huge flexural stress.Work under this condition long, bolted inefficacy can be caused, thus normally run to unit to bring great risk, bring loss to power station.
Summary of the invention
The invention provides a kind of structure simple, can carry out supporting effectively stably to bolt, overcome the flexural stress produced because centrifugal force is large, improve the safety in utilization of unit and the coupling bolt linkage structure in working life; Solve the centrifugal forces affect bolt fastening structure generation radial slippage brought in high speed conditions existed in prior art, bolt Joint failure, the technical problem of infringement unit.
Above-mentioned technical problem of the present invention is solved by following technical proposals: a kind of coupling bolt linkage structure, comprise the bolt of cross-under in coupling bolt hole, bolt comprises the swelling section at middle part and the linkage section at two ends, lining is socketed with outside the swelling section of bolt, nut is connected with at the linkage section at the two ends of bolt, the external peripheral surface of one end of described nut is stepped, nut comprises nut main body and nut support section, the diameter of nut support section is less than nut main body, nut support section stretches in bolt hole, lining in the middle part of the nut support section at bolt two ends and bolt is formed bolt and supports.The two ends of bolt are stretched out outside bolt hole, and nut is also all positioned at outside rotor.Lining is socketed in outside the swelling section of bolt, and both connect clamping by cone match.The length of lining is less than the length of bolt swelling section, is therefore formed for the bolt being positioned at bolt hole and supports completely.Bolt hole is the through hole of same diameter, is by lining to bolt support in bolt hole stage casing, and the linkage section at bolt two ends is unsettled in bolt hole, and namely have gap between the external diameter of bolt linkage section and bolt hole, the external diameter of linkage section is less than the diameter of bolt hole.Nut increases a shaft shoulder towards one end that coupling is installed, the external diameter of the supporting section of nut is less than nut main body, and the external diameter of the supporting section of nut is just adaptive with the diameter of bolt hole, the supporting section of nut can be deep in bolt hole, fills up the gap between bolt and bolt hole.The internal diameter of nut is consistent, but process a shaft shoulder in outside, structure is simple, but but axial gentle support is defined to the stay bolt being positioned at bolt hole, make the middle part of bolt in bolt hole and two ends have supporting element, there will not be unsettled state, overcome because the impact of centrifugal force that brings of high rotating speed, bolt is connected safe and effective, realize the normal work of unit.
As preferably, the length of described nut support section is identical with the length of the bolt linkage section being positioned at bolt hole.The length of nut support section can provide enough support strengths, and the length of nut support section is just in time identical with the length of the bolt linkage section being positioned at bolt hole simultaneously, can conveniently install.Because the diameter of two bolt linkage sections is identical, the versatility that nut is installed can also be improved.
As preferably, described nut support section and bolt hole are Spielpassung.Convenient mounting or dismounting, provide stable support simultaneously.
As preferably, described nut main body and nut support section are integrated.Simply shaping, structural stability.
As preferably, the shaft shoulder place that described nut forms stepped surfaces is connected on the end face of coupling.Form good support, help positioning and locking bolt.
As preferably, the outer surface of described bolt swelling section is the surface with tapering, and the internal surface of the lining coordinated with bolt swelling section is also the surface with tapering.
Therefore, a kind of coupling bolt linkage structure of the present invention possesses following advantage: the shape improving nut, and add a shaft shoulder at nut outer surfaces, structure is simple; Supported by the two ends of supporting section to unsettled bolt of nut, form an axially support with the lining in the middle part of bolt, balance the centrifugal force that high rotating speed brings, reduce the flexural stress of bolt body, improve Security and the validity of unit operation, achieve the normal work of unit.
Accompanying drawing explanation
Fig. 1 is the cross-sectional schematic of a kind of coupling bolt linkage structure of the present invention.
Fig. 2 is A place enlarged diagram in Fig. 1.
Fig. 3 is the enlarged diagram of the nut of Fig. 1.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technological scheme of invention is described in further detail.
Embodiment 1:
As shown in Figure 1, a kind of coupling bolt linkage structure, two rotors, 2, two rotors 2 comprising same unit are connected by flange connection, are separated between rotor 2 by pad 3.Rotor 2 offers bolt hole, is provided with lining 4 in through hole, lining 4 is swelling tapered sleeve, and in the swelling tapered sleeve of bolt, be socketed with bolt 5, bolt 5 comprises bolt swelling section 7 and bolt linkage section 1, is socketed with lining 4 outside bolt swelling section 7.A bolt linkage section 1 wherein part is positioned at bolt hole, and a part is positioned at outside bolt hole in addition.As shown in Figures 2 and 3, offer outside thread at the external peripheral surface of bolt linkage section 1, be threaded connection nut 6.One end of nut 6 is processed with a shaft shoulder, makes the external peripheral surface of nut form a ladder shaft-like, with diameter change, nut is divided into nut main body 9 and nut support section 8.Nut main body 9 and bolt linkage section 1 part be positioned at outside bolt hole are threaded connection, and nut support section 8 is threaded connection with bolt linkage section 1 part being positioned at bolt hole.The shaft shoulder place of nut is just in time connected to rotor and offers in the peritreme of bolt hole.Nut main body 9 and nut support section 8 are integrated, and the length of nut is identical with the length of bolt linkage section.Conveniently bolt loads in bolt hole, the diameter of bolt linkage section 1 is the diameter being less than bolt hole, therefore have gap to produce in bolt linkage section 1 and bolt hole overlapping position, nut support section 8 extend in bolt hole, nut support section 8 and bolt hole Spielpassung.The nut support section 8 being positioned at bolt two ends thus and the lining 4 be positioned in the middle part of bolt, all closely cooperate with bolt hole, form axial stable support to the bolt 5 being positioned at bolt hole.The centrifugal force that powerful rotating speed brings when unit works also can not bring huge flexural stress to bolt body, thus it is safe and effective that coupling bolt is connected, unit working stability.
Claims (8)
1. a coupling bolt linkage structure, comprise the bolt of cross-under in coupling bolt hole, bolt comprises the swelling section at middle part and the linkage section at two ends, lining is socketed with outside the swelling section of bolt, nut is connected with at the linkage section at the two ends of bolt, it is characterized in that: the external peripheral surface of one end of described nut is stepped, nut comprises nut main body and nut support section, the diameter of nut support section is less than nut main body, nut support section stretches in bolt hole, and the lining in the middle part of the nut support section at bolt two ends and bolt is formed bolt and supports.
2. a kind of coupling bolt linkage structure according to claim 1, is characterized in that: the length of described nut support section is identical with the length of the bolt linkage section being positioned at bolt hole.
3. a kind of coupling bolt linkage structure according to claim 1 and 2, is characterized in that: described nut support section and bolt hole are Spielpassung.
4. a kind of coupling bolt linkage structure according to claim 1 and 2, is characterized in that: described nut main body and nut support section are integrated.
5. a kind of coupling bolt linkage structure according to claim 3, is characterized in that: described nut main body and nut support section are integrated.
6. a kind of coupling bolt linkage structure according to claim 1 and 2, is characterized in that: the shaft shoulder place that described nut forms stepped surfaces is connected on the end face of coupling.
7. a kind of coupling bolt linkage structure according to claim 5, is characterized in that: the shaft shoulder place that described nut forms stepped surfaces is connected on the end face of coupling.
8. a kind of coupling bolt linkage structure according to claim 1 and 2, is characterized in that: the outer surface of described bolt swelling section is the surface with tapering, and the internal surface of the lining coordinated with bolt swelling section is also the surface with tapering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410307898.7A CN104235201A (en) | 2014-07-01 | 2014-07-01 | Coupling bolt connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410307898.7A CN104235201A (en) | 2014-07-01 | 2014-07-01 | Coupling bolt connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104235201A true CN104235201A (en) | 2014-12-24 |
Family
ID=52223895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410307898.7A Pending CN104235201A (en) | 2014-07-01 | 2014-07-01 | Coupling bolt connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104235201A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776103A (en) * | 2015-03-19 | 2015-07-15 | 镇江索达联轴器有限公司 | Dedicated bolt for diaphragm coupler |
| CN106931864A (en) * | 2017-03-22 | 2017-07-07 | 苏本涛 | A kind of clipping fixing device of shaft coupling alignment dial gauge |
| CN107989876A (en) * | 2016-10-26 | 2018-05-04 | 斯凯孚公司 | The installation method of bolt device, coupling arrangement and coupling arrangement |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4685188A (en) * | 1986-02-24 | 1987-08-11 | Alsthom | Method of coupling two flanged shaft ends |
| WO1996021089A1 (en) * | 1995-01-06 | 1996-07-11 | Westinghouse Electric Corporation | Combustion turbine alignment method and apparatus |
| JP2000283171A (en) * | 1999-03-31 | 2000-10-13 | Toshiba Corp | Flange shaft coupling of rotating machinery |
| CN201293050Y (en) * | 2008-11-19 | 2009-08-19 | 山东齐鲁电机制造有限公司 | Stop bolt apparatus for coupler assembly |
| CN201363354Y (en) * | 2009-03-06 | 2009-12-16 | 南通航海机械有限公司 | Hydraulic fitting bolt |
| CN102076977A (en) * | 2008-06-26 | 2011-05-25 | Jetyd公司 | Radially expanding bolt assembly |
| CN203939880U (en) * | 2014-07-01 | 2014-11-12 | 杭州福朗机电科技有限公司 | A kind of coupling bolt modular construction |
-
2014
- 2014-07-01 CN CN201410307898.7A patent/CN104235201A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4685188A (en) * | 1986-02-24 | 1987-08-11 | Alsthom | Method of coupling two flanged shaft ends |
| WO1996021089A1 (en) * | 1995-01-06 | 1996-07-11 | Westinghouse Electric Corporation | Combustion turbine alignment method and apparatus |
| JP2000283171A (en) * | 1999-03-31 | 2000-10-13 | Toshiba Corp | Flange shaft coupling of rotating machinery |
| CN102076977A (en) * | 2008-06-26 | 2011-05-25 | Jetyd公司 | Radially expanding bolt assembly |
| CN201293050Y (en) * | 2008-11-19 | 2009-08-19 | 山东齐鲁电机制造有限公司 | Stop bolt apparatus for coupler assembly |
| CN201363354Y (en) * | 2009-03-06 | 2009-12-16 | 南通航海机械有限公司 | Hydraulic fitting bolt |
| CN203939880U (en) * | 2014-07-01 | 2014-11-12 | 杭州福朗机电科技有限公司 | A kind of coupling bolt modular construction |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776103A (en) * | 2015-03-19 | 2015-07-15 | 镇江索达联轴器有限公司 | Dedicated bolt for diaphragm coupler |
| CN107989876A (en) * | 2016-10-26 | 2018-05-04 | 斯凯孚公司 | The installation method of bolt device, coupling arrangement and coupling arrangement |
| US10962040B2 (en) | 2016-10-26 | 2021-03-30 | Aktiebolaget Skf | Bolt arrangement, coupling arrangement and method to mount a coupling arrangement |
| CN106931864A (en) * | 2017-03-22 | 2017-07-07 | 苏本涛 | A kind of clipping fixing device of shaft coupling alignment dial gauge |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141224 |