CN109861417B - Hydraulic generator stator core through screw rod structure - Google Patents
Hydraulic generator stator core through screw rod structure Download PDFInfo
- Publication number
- CN109861417B CN109861417B CN201910165236.3A CN201910165236A CN109861417B CN 109861417 B CN109861417 B CN 109861417B CN 201910165236 A CN201910165236 A CN 201910165236A CN 109861417 B CN109861417 B CN 109861417B
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- Prior art keywords
- screw
- insulating
- penetrating
- hole
- stator core
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- 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.)
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Links
- 230000000149 penetrating effect Effects 0.000 claims abstract description 62
- 238000009413 insulation Methods 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 238000003475 lamination Methods 0.000 claims description 20
- 230000000670 limiting effect Effects 0.000 claims description 17
- 230000035515 penetration Effects 0.000 claims description 2
- 238000004080 punching Methods 0.000 abstract 2
- 239000003973 paint Substances 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
-
- 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
- Y02E10/20—Hydro energy
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
A hydraulic generator stator core through screw structure comprises an upper fixing bolt, an upper elastic insulating gasket, a through screw, a lower fixing bolt and a lower insulating gasket, wherein the stator core is provided with a screw through hole; the structure also comprises an insulating structure formed by a plurality of sections of insulating sleeves and a plurality of insulating support sections, the insulating structure is arranged in the screw through hole and is connected with the iron core, and the penetrating screw passes through the insulating structure; the insulation support sections are positioned at different positions in the axial direction of the screw through hole and form a multi-section support by the core to the through screw; in the screw through hole, the insulating support section has screw rod penetrating end and screw rod penetrating end, and a plurality of insulating support sections have the toper hole that the toper direction is unanimous, and insulating support section is being close to between taper hole path end and the screw rod penetrating end and is forming the supporting part to the punching screw rod, and supporting part and punching screw rod extrusion fit are provided with insulating sleeve between two adjacent insulating support sections.
Description
Technical Field
The invention relates to the field of generators, in particular to a hydraulic generator stator core through screw rod structure.
Background
The stator core of a hydro-generator typically employs a feed-through screw to secure the stator core laminations to withstand the forces generated by the electromagnetic torque and alternating magnetic fields. For insulation between the penetrating screw and the stator core lamination, two modes of brushing insulating paint on the penetrating screw and sleeving an insulating sleeve on the penetrating screw are mainly adopted at present. For the method of brushing insulating paint on the through screw, the insulating paint on the screw is possibly damaged due to transverse vibration friction, so that the iron core is burnt; in the method for sleeving the insulating sleeve on the through screw rod, because a gap exists between the screw rod and the externally-added insulating sleeve, the through screw rod is fixed at the upper end and the lower end, the middle part is not supported, and if the iron core is in a suspended state, if the iron core is too long, resonance can be caused under the electromagnetic excitation frequency, so that the screw rod is broken, and therefore, the stator iron core lamination is damaged. Therefore, the research on a safe and reliable stator core through screw structure is a problem worthy of research.
Disclosure of Invention
The invention aims to provide a hydraulic generator stator core through screw rod structure, which realizes reliable insulation between a through screw rod and stator core lamination, is supported at a plurality of positions in the middle of the through screw rod, has reliable structure and is suitable for fixing a hydraulic generator stator core with a longer core. The invention adopts the following technical scheme.
The utility model provides a hydraulic generator stator core wears a core screw rod structure, includes upper portion fixing bolt, upper portion elastic insulation gasket, wears a core screw rod, lower part fixing bolt and lower part insulation gasket, the stator core sets up the screw rod through-hole; the structure also comprises an insulating structure formed by a plurality of sections of insulating sleeves and a plurality of insulating support sections, wherein the insulating structure is arranged in the screw through hole and is connected with the iron core, and the penetrating screw rod penetrates through the insulating structure; the insulation support sections are positioned at different positions in the axial direction of the screw through hole and form multi-section support for the through screw by depending on the iron core; the insulation support sections are provided with screw penetrating ends and screw penetrating ends, the plurality of insulation support sections are provided with conical holes with the same conical direction, support parts for the penetrating screws are formed between the small-diameter ends close to the conical holes and the screw penetrating ends, the support parts are in tight extrusion fit with the penetrating screws, and penetrating screw penetrating areas are formed between the screw penetrating ends and the small-diameter ends close to the conical holes; and the insulating sleeve is arranged between two adjacent insulating support sections and limited by the insulating support sections.
Preferably, the diameter of the small diameter end of the tapered bore is only slightly smaller than the diameter of the large diameter end.
Preferably, the inner sides of the screw penetrating end and the screw penetrating end of the insulating support section are respectively provided with a limiting step, two ends of the insulating sleeve between two adjacent insulating support sections are respectively leaning against the side walls of the limiting steps, and the length of the insulating sleeve is shorter than the distance between the opposite limiting steps of the two adjacent insulating support sections.
Preferably, radial protrusions are arranged on the outer portion of the insulating support section, and the radial protrusions are clamped between the core laminations.
Preferably, the inner diameters of the insulating sleeve and the large-diameter end of the conical hole are 0.8-1.2 mm larger than the diameter of the penetrating screw.
Preferably, the radial projection is provided on the outer wall near the penetrating end of the screw.
Preferably, the root of the radial protrusion is further provided with an axial protrusion facing away from the penetrating end of the screw, and the axial protrusion is also abutted against the wall of the through hole of the screw, and a limit step for the insulating sleeve is formed on the inner side of the axial protrusion.
Preferably, the core laminations corresponding to the position of the insulating support segments are correspondingly shaped at the threaded through holes to conform to the shape of the insulating support segments.
The beneficial effects of the invention are as follows:
1. the multi-section insulating sleeve and the plurality of insulating support sections are arranged, so that the insulating sleeve is prevented from being too long, the through screw can be supported more stably, the vibration of the through screw is prevented, the insulating sleeve and the insulating support sections are sleeved outside the through screw, the insulating effect is achieved, and the contact between the through screw and the stator core lamination is avoided;
2. the diameter of the small diameter end of the conical hole of the insulating support section is only slightly smaller than that of the large diameter end, so that the penetrating screw rod easily penetrates through the support section, and a gap between the support section and the penetrating screw rod is smaller, thereby preventing the penetrating screw rod from vibrating;
3. the inner sides of the screw penetrating end and the screw penetrating end of the insulating support section are respectively provided with a limiting step, so that the insulating support section has a limiting effect on the multi-section insulating sleeve and prevents the insulating sleeve from shifting;
4. the outer part of the insulating support section is provided with radial protrusions clamped between the iron core laminations, so that the connection between the insulating support section and the iron core laminations is more stable;
5. the inner diameters of the large-diameter ends of the insulating sleeve and the conical hole are slightly larger than the diameter of the penetrating screw, so that the penetrating screw can be effectively prevented from shaking in the insulating sleeve and the insulating support section;
6. the root of the radial bulge is also provided with an axial bulge, a limit step for the insulation sleeve is formed at the inner side of the axial bulge, and the radial bulge, the axial bulge and the limit step form a triangular structure, mutually support and more stably fix the insulation structure;
7. the iron core lamination corresponding to the position of the insulating support section is correspondingly processed into a shape matched with the insulating support section at the screw through hole, so that an insulating structure is fixed more stably;
8. the inner diameter of the middle part of the insulating support section gradually contracts to be the same as the diameter of the through screw, so that the insulating support section is tightly connected with the through screw, and screw fracture caused by resonance caused by overlong iron cores under electromagnetic excitation frequency is avoided, and stator iron core lamination is prevented from being damaged.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the connection of the insulating support section to the insulating sleeve according to the present invention.
Fig. 3 is a schematic view of an insulating support section of the present invention.
Reference numerals illustrate: 1. an upper fixing bolt; 2. an upper elastic insulating spacer; 3. a feed-through screw; 4. an insulating sleeve; 5. an insulating support section; 6. a lower fixing bolt; 7. a lower insulating spacer; 8. a stator base; 9. iron core lamination; 10. a first limit step; 11. a second limit step; 12. a support part; 13. radial protrusions; 14. a screw penetration end; 15. a screw rod penetrating end; 16. a small diameter end of the conical hole; 17. and (5) an axial bulge.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1 to 2, a hydraulic generator stator core through screw structure comprises an upper fixing bolt 1, an upper elastic insulating gasket 2, a through screw 3, a lower fixing bolt 6 and a lower insulating gasket 7, wherein the stator core is provided with screw through holes. The structure further comprises an insulating structure formed by a plurality of sections of insulating sleeves 4 and a plurality of insulating support sections 5, wherein the insulating structure is arranged in a screw through hole and is connected with the iron core lamination 9, and a penetrating screw passes through the insulating structure. A plurality of insulating support sections are positioned at different positions in the axial direction of the screw through hole and support the through screw by the core lamination to form a multi-section support. In the screw through hole, the insulating support section has screw rod penetrating end 14 and screw rod penetrating end 15, and a plurality of insulating support sections have the taper hole that the taper direction is unanimous, and insulating support section is being close to between taper hole path end 16 and the screw rod penetrating end to forming the supporting part 12 of penetrating the screw rod, supporting part and penetrating screw rod extrusion fit, form the penetrating screw rod and penetrate the district between the screw rod penetrating end to being close to the taper hole path end. And the insulating sleeve is arranged between two adjacent insulating support sections and is limited by the insulating support sections.
The diameter of the small diameter end of the conical hole is only slightly smaller than that of the large diameter end, the inner sides of the penetrating end of the screw rod and the penetrating end of the screw rod of the insulation support section are respectively provided with a limiting step, and the first limiting step 10 and the second limiting step 11 are used for supporting and limiting the insulation sleeve and firmly clamping the insulation sleeve. The two ends of the insulating sleeve between the two adjacent insulating support sections respectively lean against the side walls of the limiting steps, and the length of the insulating sleeve is shorter than the distance between the opposite limiting steps of the two adjacent insulating support sections. The outside of insulating support section sets up radial protruding 13, and radial protruding joint is between the iron core lamination, and radial protruding setting is near the outer wall of screw rod penetrating end, and radial bellied root still is provided with the axial arch 17 towards the direction of keeping away from the screw rod penetrating end, and this axial arch also leans on the screw rod through-hole pore wall to form the first spacing step to insulating sleeve's in the bellied inboard of axial. The inner diameter of the large-diameter end of the taper hole of the insulating sleeve is 0.8-1.2 mm larger than the diameter of the penetrating screw. The core laminations corresponding to the positions of the insulating support segments are correspondingly shaped at the screw through holes to conform to the shape of the insulating support segments.
The feed screw 3 has an upper flight section and a lower flight section. The upper fixing bolt and the upper elastic insulating gasket 2 are connected with the upper thread section of the penetrating screw rod, and the lower fixing bolt 6 and the lower insulating gasket 7 are connected with the lower thread section of the penetrating screw rod 3. The insulating support section 5 is connected with the insulating sleeve 4, avoiding the contact of the piercing screw with the core lamination 9. The core laminations 9 are fixed to the stator frame 8. The insulating support section 5 and the insulating sleeve 4 are made of the same material, and are both tubular.
The diameter of the conical hole gradually contracts from the screw penetrating end to be tightly connected with the penetrating screw, or gradually contracts from the screw penetrating end to be tightly connected with the penetrating screw after the diameter is kept unchanged for a section, or gradually contracts from the screw penetrating end to be tightly connected with the penetrating screw after the diameter is kept unchanged to the second limiting step.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, i.e. all equivalent changes and modifications that may be made in accordance with the present invention are covered by the appended claims, which are not intended to be construed as limiting.
Claims (6)
1. The utility model provides a hydraulic generator stator core wears a core screw rod structure, includes upper portion fixing bolt, upper portion elastic insulation gasket, wears a core screw rod, lower part fixing bolt and lower part insulation gasket, the stator core sets up the screw rod through-hole; the structure is characterized by further comprising an insulating structure formed by a plurality of sections of insulating sleeves and a plurality of insulating support sections, wherein the insulating structure is arranged in the screw through hole and is connected with the iron core, and the penetrating screw passes through the insulating structure; the insulation support sections are positioned at different positions in the axial direction of the screw through hole and form multi-section support for the through screw by depending on the iron core; the insulation support sections are provided with screw penetrating ends and screw penetrating ends, the plurality of insulation support sections are provided with conical holes with the same conical direction, support parts for the penetrating screws are formed between the small-diameter ends close to the conical holes and the screw penetrating ends, the support parts are in tight extrusion fit with the penetrating screws, and penetrating screw penetrating areas are formed between the screw penetrating ends and the small-diameter ends close to the conical holes; the insulating sleeve is arranged between two adjacent insulating support sections, and the insulating sleeve is limited by the insulating support sections;
the inner sides of the screw penetrating end and the screw penetrating end of the insulating support section are respectively provided with a limiting step, two ends of an insulating sleeve between two adjacent insulating support sections are respectively leaned against the side walls of the limiting steps, and the length of the insulating sleeve is shorter than the distance between the opposite limiting steps of the two adjacent insulating support sections;
the outside of insulating support section sets up radial protruding, radial protruding joint is between the iron core lamination.
2. A hydro-generator stator core feed-through screw structure as defined in claim 1 wherein the diameter of the small diameter end of the tapered bore is only slightly smaller than the diameter of the large diameter end.
3. The hydraulic generator stator core through screw structure according to claim 1, wherein the inner diameters of the insulating sleeve and the large-diameter end of the conical hole are 0.8-1.2 mm larger than the diameter of the through screw.
4. The stator core feed-through screw structure of a hydro-generator as defined by claim 1 wherein the radial projections are disposed on the outer wall adjacent the feed-through end of the screw.
5. The stator core penetration screw structure of a hydraulic generator according to claim 4, wherein the root of the radial protrusion is further provided with an axial protrusion facing away from the penetrating end of the screw, and the axial protrusion is also abutted against the wall of the screw through hole and forms a limit step for the insulation sleeve on the inner side of the axial protrusion.
6. A stator core feed-through screw structure for a hydro-generator as defined by claim 1 wherein the core laminations corresponding to the positions of the insulated support segments are correspondingly shaped at the screw throughbores to conform to the shape of the insulated support segments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910165236.3A CN109861417B (en) | 2019-03-05 | 2019-03-05 | Hydraulic generator stator core through screw rod structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910165236.3A CN109861417B (en) | 2019-03-05 | 2019-03-05 | Hydraulic generator stator core through screw rod structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109861417A CN109861417A (en) | 2019-06-07 |
| CN109861417B true CN109861417B (en) | 2024-04-02 |
Family
ID=66899899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910165236.3A Active CN109861417B (en) | 2019-03-05 | 2019-03-05 | Hydraulic generator stator core through screw rod structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109861417B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009556A (en) * | 2014-05-23 | 2014-08-27 | 国家电网公司 | Stator through bolt insulating device for improving ventilation performance of pump storage group |
| CN204243926U (en) * | 2014-12-05 | 2015-04-01 | 东芝水电设备（杭州）有限公司 | Vertical shaft stator iron core of hydraulic generator compressing structure |
| CN204442039U (en) * | 2014-12-08 | 2015-07-01 | 大唐陕西发电有限公司石泉水力发电厂 | A kind of seal of hydraulic generator rotor |
| CN207426843U (en) * | 2017-11-08 | 2018-05-29 | 东方电气集团东方电机有限公司 | A kind of stator core through screw rod casing insulation system |
| CN108173363A (en) * | 2018-01-25 | 2018-06-15 | 东方电气集团东方电机有限公司 | A kind of generator stator core core through screw rod connection structure and its installation method |
| CN207947150U (en) * | 2017-12-08 | 2018-10-09 | 保定天威保变电气股份有限公司 | A kind of transformer core core through screw rod insulation system |
| CN208386258U (en) * | 2018-08-06 | 2019-01-15 | 大唐甘肃发电有限公司碧口水力发电厂 | Stator core through screw rod insulation system |
| CN209748278U (en) * | 2019-03-05 | 2019-12-06 | 中国电建集团华东勘测设计研究院有限公司 | Hydraulic generator stator core penetrating screw rod structure |
-
2019
- 2019-03-05 CN CN201910165236.3A patent/CN109861417B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009556A (en) * | 2014-05-23 | 2014-08-27 | 国家电网公司 | Stator through bolt insulating device for improving ventilation performance of pump storage group |
| CN204243926U (en) * | 2014-12-05 | 2015-04-01 | 东芝水电设备（杭州）有限公司 | Vertical shaft stator iron core of hydraulic generator compressing structure |
| CN204442039U (en) * | 2014-12-08 | 2015-07-01 | 大唐陕西发电有限公司石泉水力发电厂 | A kind of seal of hydraulic generator rotor |
| CN207426843U (en) * | 2017-11-08 | 2018-05-29 | 东方电气集团东方电机有限公司 | A kind of stator core through screw rod casing insulation system |
| CN207947150U (en) * | 2017-12-08 | 2018-10-09 | 保定天威保变电气股份有限公司 | A kind of transformer core core through screw rod insulation system |
| CN108173363A (en) * | 2018-01-25 | 2018-06-15 | 东方电气集团东方电机有限公司 | A kind of generator stator core core through screw rod connection structure and its installation method |
| CN208386258U (en) * | 2018-08-06 | 2019-01-15 | 大唐甘肃发电有限公司碧口水力发电厂 | Stator core through screw rod insulation system |
| CN209748278U (en) * | 2019-03-05 | 2019-12-06 | 中国电建集团华东勘测设计研究院有限公司 | Hydraulic generator stator core penetrating screw rod structure |
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| Publication number | Publication date |
|---|---|
| CN109861417A (en) | 2019-06-07 |
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