CN111043138A - Steam turbine generator rotor conductive screw structure and connection method - Google Patents
Steam turbine generator rotor conductive screw structure and connection method Download PDFInfo
- Publication number
- CN111043138A CN111043138A CN201911129220.3A CN201911129220A CN111043138A CN 111043138 A CN111043138 A CN 111043138A CN 201911129220 A CN201911129220 A CN 201911129220A CN 111043138 A CN111043138 A CN 111043138A
- Authority
- CN
- China
- Prior art keywords
- handed nut
- rotor
- conductive screw
- screw
- rotor conductive
- 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
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000004020 conductor Substances 0.000 claims abstract description 14
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 12
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
- F16B39/16—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts in which the screw-thread of the locknut differs from that of the nut
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/302—Clamped connections, spring connections utilising a screw or nut clamping member having means for preventing loosening of screw or nut, e.g. vibration-proof connection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/307—Clamped connections, spring connections utilising a screw or nut clamping member characterised by the thread of the screw or nut
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/10—Connectors or connections adapted for particular applications for dynamoelectric machines
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention discloses a steam turbine generator rotor conductive screw structure and a connection method, comprising a rotor conductive screw, a J-shaped lead, a right-handed nut, a left-handed nut, a gasket and a rotor shaft inner conductor. The invention overcomes the defects of the traditional steam turbine generator rotor conductive screw connection structure, and can effectively enhance the vibration and loosening resistance of the connection structure; meanwhile, the conductive reliability is enhanced, the conductor heating condition caused by resistance change can be effectively relieved, and the safety of equipment is protected.
Description
Technical Field
The invention belongs to the technical field of electrical equipment, and particularly relates to a steam turbine generator rotor conductive screw structure and a connection method.
Background
In the prior art, as shown in fig. 1, firstly, an electric conductor in a rotor shaft of a steam turbine generator is screwed with the lower end of an old conductive screw, then a high-strength bolt is used to penetrate through a gasket and a connecting hole of a winding J-shaped lead, and then an internal thread at the upper end of the old conductive screw is screwed in to fasten the rotor winding J-shaped lead and the old conductive screw to form a current channel.
When the turbonator normally runs, the rotating speed is up to 3000rpm, and because the connecting point of the existing old conductive screw and the J-shaped lead of the rotor winding is positioned at the edge of the rotating structure of the whole turbonator, the following risks exist:
(1) when the generator normally operates and starts or stops, the high-strength bolt connected to the upper part can bear larger centrifugal force, vibration and variable load impact, so that vibration and loosening are caused. The traditional bolt and gasket structure has poor vibration and loosening resistance in a non-static environment.
(2) After the high-strength bolt connected to the upper part is loosened, even if the wire withdrawing condition is not very serious, the connection between the surface of the old conductive screw and the J-shaped lead wire of the winding can be separated under the action of strong centrifugal force. This results in a doubling of the contact resistance of the connection points, and the temperature rises severely when a large current is passed, jeopardizing the safety of the equipment.
The equipment failure caused by the connection looseness of the old conductive screw of the steam turbine generator and the J-shaped lead wire of the winding occurs for a long time. Therefore, a novel turbine generator rotor conductive screw structure and a connection method which can effectively resist vibration and loosening and have reliable conductive capacity need to be provided.
Disclosure of Invention
In order to overcome the risks of the traditional old conductive screw structure and the connection method, the invention provides a novel conductive screw structure and a connection method for a steam turbine generator rotor, which have strong vibration and loosening resistance and reliable conductive capability.
The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides a turbo generator rotor conductive screw structure, includes rotor shaft internal conductor, characterized by, still includes rotor conductive screw, J type lead wire, right-handed nut, left-handed nut and gasket, rotor conductive screw's lower extreme screw in is to rotor shaft internal conductor, rotor conductive screw's upper end is reducing structure, J type lead wire is through its connecting hole suit in reducing structure's bottom, the gasket suit is in J type lead wire's top, in J type lead wire's top reducing structure's surface is provided with bispin to discontinuous compound external screw thread (Tang's screw thread), right-handed nut and left-handed nut respectively with bispin is to discontinuous compound screw-thread fit, right-handed nut and left-handed nut are installed in proper order on reducing structure.
Furthermore, the right-handed nut is in contact with the left-handed nut, and the top end of the diameter-changing structure is higher than the top end of the left-handed nut.
Furthermore, the rotor conductive screw and the J-shaped lead are both made of copper alloy.
The connection method of the steam turbine generator rotor conductive screw structure is characterized in that the lower end of a rotor conductive screw is screwed into a conductor in a rotor shaft for fixing, a J-shaped lead is sleeved on a reducing structure at the upper end of the rotor conductive screw, a gasket and a right-handed nut are sleeved at the upper end of the rotor conductive screw for fastening, and a left-handed nut is sleeved and screwed to prevent the right-handed nut from loosening.
Because the direction that the right-handed nut withdraws the silk is the direction that the left-handed nut screwed up, form the locking form in structure, can effectively strengthen the anti-vibration loose ability.
Compared with the prior art, the invention has the following advantages and effects:
(1) because the rotor conductive screw adopts the Down's screw thread, the right-handed nut and the left-handed nut form a structural anti-loosening form, and the anti-vibration loosening capability can be effectively enhanced.
(2) The rotor conductive screw and the J-shaped lead are made of copper alloy materials and have high conductivity, the rotor conductive screw and the J-shaped lead are directly connected in a penetrating and sleeving mode, the conductive reliability is enhanced, even if the nut is loosened by vibration, the heating condition of a conductor caused by resistance change can be effectively relieved, and the safety of equipment is protected.
Drawings
Fig. 1 is a schematic structural diagram of a conventional old conductive screw and a connection method.
Fig. 2 is a schematic structural diagram of a rotor conductive screw and a connection method according to an embodiment of the present invention.
In the figure: the rotor comprises a rotor conductive screw 1, a J-shaped lead 2, a right-handed nut 3, a left-handed nut 4, a gasket 5, a rotor shaft inner conductor 6 and a reducing structure 7.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Referring to fig. 2, a turbo generator rotor conductive screw structure comprises a rotor conductive screw 1, a J-shaped lead 2, a right-handed nut 3, a left-handed nut 4, a gasket 5 and a rotor shaft inner conductor 6, wherein the lower end of the rotor conductive screw 1 is screwed into the rotor shaft inner conductor 6, the upper end of the rotor conductive screw 1 is a variable diameter structure 7, the J-shaped lead 2 is sleeved at the bottom end of the variable diameter structure 7 through a connecting hole thereof, the gasket 5 is sleeved above the J-shaped lead 2, a double-handed discontinuous composite external thread is arranged above the J-shaped lead 2 and on the outer surface of the variable diameter structure 7, the right-handed nut 3 and the left-handed nut 4 are respectively matched with the double-handed discontinuous composite external thread, the right-handed nut 3 and the left-handed nut 4 are sequentially installed on the variable diameter structure 7, the right-handed nut 3 is in contact with the left-handed nut 4, the rotor conductive screw 1 and the J-shaped lead 2 are both made of copper alloy.
During processing, the upper part of the rotor conductive screw 1 is made into a reducing structure 7 according to the size of a connecting hole of the J-shaped lead 2, an lengthening structure is made according to the thicknesses of the J-shaped lead 2, the right-handed nut 3 and the left-handed nut 4, and double-handed discontinuous composite external threads (Down's threads) are processed on the outer surface of a part above the J-shaped lead 2.
During the use, fix in at first the lower extreme screw in rotor shaft inner conductor 6 of rotor conductive screw 1, then with J type lead wire 2 suit on the reducing structure 7 of rotor conductive screw 1 upper end, including gasket 5, suit dextrorotation nut 3 and screw up, guarantee J type lead wire 2 and rotor conductive screw 1 fastening back, suit and screw up levogyration nut 4 again, prevent that dextrorotation nut 3 from loosening.
Because the direction that the right-handed nut 3 moves back the silk is the direction that left-handed nut 4 was screwed up, formed the locking form in structure, can effectively strengthen the anti-vibration loose ability.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (4)
1. The utility model provides a turbo generator rotor conductive screw structure, includes rotor shaft inner conductor (6), characterized by, still includes rotor conductive screw (1), J type lead wire (2), right-handed nut (3), left-handed nut (4) and gasket (5), the lower extreme screw in of rotor conductive screw (1) is to rotor shaft inner conductor (6) in, the upper end of rotor conductive screw (1) is reducing structure (7), J type lead wire (2) through its connecting hole suit in the bottom of reducing structure (7), gasket (5) suit is in the top of J type lead wire (2), the surface of reducing structure (7) is provided with the compound external screw thread of bispin direction, right-handed nut (3) and left-handed nut (4) respectively with the compound external screw thread fit of bispin direction discontinuity, the right-handed nut (3) and the left-handed nut (4) are sequentially arranged on the reducing structure (7).
2. The steam turbine generator rotor conducting screw structure as claimed in claim 1, wherein the right-handed nut (3) and the left-handed nut (4) are in contact, and the top end of the reducing structure (7) is higher than the top end of the left-handed nut (4).
3. The rotor conducting screw structure of the steam turbine generator as claimed in claim 1, wherein the rotor conducting screw (1) and the J-shaped lead (2) are both made of copper alloy.
4. A connection method of a rotor conductive screw structure of a steam turbine generator according to claim 1, 2 or 3, characterized in that the lower end of the rotor conductive screw (1) is screwed into the rotor shaft inner conductor (6) for fixing, then the J-shaped lead (2) is sleeved on the diameter-variable structure (7) at the upper end of the rotor conductive screw (1), then the upper end of the rotor conductive screw (1) is sleeved with a gasket (5) and a right-handed nut (3) for fastening, and finally the left-handed nut (4) is sleeved and screwed to prevent the right-handed nut (3) from loosening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129220.3A CN111043138A (en) | 2019-11-18 | 2019-11-18 | Steam turbine generator rotor conductive screw structure and connection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129220.3A CN111043138A (en) | 2019-11-18 | 2019-11-18 | Steam turbine generator rotor conductive screw structure and connection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111043138A true CN111043138A (en) | 2020-04-21 |
Family
ID=70231982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911129220.3A Pending CN111043138A (en) | 2019-11-18 | 2019-11-18 | Steam turbine generator rotor conductive screw structure and connection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111043138A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233987A (en) * | 2021-11-22 | 2022-03-25 | 华能国际电力股份有限公司大连电厂 | TSI sensor connection structure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201051683Y (en) * | 2007-06-06 | 2008-04-23 | 上海汽轮发电机有限公司 | Radial conductive screw locking structure for generator rotor |
| CN102011784A (en) * | 2010-11-23 | 2011-04-13 | 北京北方专用车新技术发展有限公司 | Anti-loosing and locking method of bolt and nut with left and right-hand threads |
| US20110148231A1 (en) * | 2009-12-17 | 2011-06-23 | Whitener Randy E | Nut Securing Arrangement for Electrical Generator |
| CN104578513A (en) * | 2013-10-29 | 2015-04-29 | 泰豪沈阳电机有限公司 | Conducting bolt insulation structure for turbogenerator |
| CN204304193U (en) * | 2014-12-03 | 2015-04-29 | 广西桂冠开投电力有限责任公司 | Carbon brush holder support adjusting rod |
| CN205092685U (en) * | 2015-10-24 | 2016-03-16 | 卧龙电气南阳防爆集团股份有限公司 | Generator rotor magnetic pole lead fixed structure |
| CN207968122U (en) * | 2018-04-12 | 2018-10-12 | 哈尔滨电机厂有限责任公司 | A kind of cable clamp structure that hydraulic generator rotor lead is bidirectionally limited |
| CN211715512U (en) * | 2019-11-18 | 2020-10-20 | 华电电力科学研究院有限公司 | Turbo generator rotor conducting screw structure |
-
2019
- 2019-11-18 CN CN201911129220.3A patent/CN111043138A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201051683Y (en) * | 2007-06-06 | 2008-04-23 | 上海汽轮发电机有限公司 | Radial conductive screw locking structure for generator rotor |
| US20110148231A1 (en) * | 2009-12-17 | 2011-06-23 | Whitener Randy E | Nut Securing Arrangement for Electrical Generator |
| CN102011784A (en) * | 2010-11-23 | 2011-04-13 | 北京北方专用车新技术发展有限公司 | Anti-loosing and locking method of bolt and nut with left and right-hand threads |
| CN104578513A (en) * | 2013-10-29 | 2015-04-29 | 泰豪沈阳电机有限公司 | Conducting bolt insulation structure for turbogenerator |
| CN204304193U (en) * | 2014-12-03 | 2015-04-29 | 广西桂冠开投电力有限责任公司 | Carbon brush holder support adjusting rod |
| CN205092685U (en) * | 2015-10-24 | 2016-03-16 | 卧龙电气南阳防爆集团股份有限公司 | Generator rotor magnetic pole lead fixed structure |
| CN207968122U (en) * | 2018-04-12 | 2018-10-12 | 哈尔滨电机厂有限责任公司 | A kind of cable clamp structure that hydraulic generator rotor lead is bidirectionally limited |
| CN211715512U (en) * | 2019-11-18 | 2020-10-20 | 华电电力科学研究院有限公司 | Turbo generator rotor conducting screw structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233987A (en) * | 2021-11-22 | 2022-03-25 | 华能国际电力股份有限公司大连电厂 | TSI sensor connection structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20070270002A1 (en) | Ground stud installation on composite structures for electrostatic charges | |
| CN211715512U (en) | Turbo generator rotor conducting screw structure | |
| CN208778151U (en) | Blade lightning protection device, blade lightning-protection system, fan blade and wind-driven generator | |
| CN111043138A (en) | Steam turbine generator rotor conductive screw structure and connection method | |
| CN101872906A (en) | Cable connector for directly connecting cables by way of piercing cable insulation | |
| CN208778152U (en) | Blade tip lightning protection device, blade lightning-protection system, fan blade and wind-driven generator | |
| CN207269058U (en) | Taper sheath locking type accumulator terminal | |
| CN113323822A (en) | Lightning protection device of wind power blade | |
| US4866839A (en) | Method for forming a high-conductivity junction between composite structures and metal fittings | |
| CN202817203U (en) | Penetrating cable clamp | |
| WO2023040241A1 (en) | Shaft current protection structure of variable frequency motor | |
| CN201051683Y (en) | Radial conductive screw locking structure for generator rotor | |
| CN205092685U (en) | Generator rotor magnetic pole lead fixed structure | |
| CN204942072U (en) | A kind of impeller assembly of high-speed centrifugal blower | |
| CN201457120U (en) | Bolt-type contact wire electrical connection clamp | |
| CN204927588U (en) | Electric plug | |
| CN207117360U (en) | Motor | |
| CN207353487U (en) | Cable connecting terminal | |
| CN208209121U (en) | A kind of electrical equipment connector connection component | |
| CN212136853U (en) | Electric corrosion prevention collecting ring | |
| CN215070478U (en) | Electric power fitting for overhead line | |
| CN218829324U (en) | Lead-out wire connection structure of hydraulic generator stator core-through screw | |
| CN207339205U (en) | A kind of tower grounding device | |
| CN212435329U (en) | Bearing type rotary joint | |
| CN204720779U (en) | For the tapping screw of spark plug cap |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |