CN116488378A - H-level insulation structure of high-altitude high-rotation-speed hydraulic generator rotor - Google Patents
H-level insulation structure of high-altitude high-rotation-speed hydraulic generator rotor Download PDFInfo
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- CN116488378A CN116488378A CN202310632920.4A CN202310632920A CN116488378A CN 116488378 A CN116488378 A CN 116488378A CN 202310632920 A CN202310632920 A CN 202310632920A CN 116488378 A CN116488378 A CN 116488378A
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- magnetic pole
- level
- insulation
- glass cloth
- rotation
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- 238000009413 insulation Methods 0.000 title claims abstract description 86
- 239000011521 glass Substances 0.000 claims description 40
- 239000004744 fabric Substances 0.000 claims description 37
- 239000004760 aramid Substances 0.000 claims description 21
- 229920003235 aromatic polyamide Polymers 0.000 claims description 21
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 claims description 19
- 229920003192 poly(bis maleimide) Polymers 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 239000012212 insulator Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 7
- 229920000784 Nomex Polymers 0.000 claims description 6
- 239000004763 nomex Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 abstract description 10
- 239000012774 insulation material Substances 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
-
- 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
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention discloses an H-level insulation structure of a high-altitude high-rotation-speed hydraulic generator rotor, which consists of inter-turn insulation of magnetic poles, insulation of the magnetic poles to the ground and conformal insulation, wherein the temperature resistance grades of insulation materials used in all parts are H-level. The H-level temperature resistance grade indicates that the insulating material can still keep good insulating performance at the temperature not higher than 180 ℃, and the insulating structure and the insulating material have good weather resistance, so that the operation safety of the high-rotation-speed hydraulic generator rotor can be ensured under the high-altitude climate condition. The invention has good application prospect, and can effectively solve the problem of rapid aging and degradation of the insulating material caused by over-high temperature rise of the rotor of the high-altitude high-rotation-speed generator.
Description
Technical Field
The invention belongs to the technical field of manufacturing of high-altitude high-rotation-speed hydraulic generators, and particularly relates to an H-level rotor insulation structure.
Background
The high-altitude high-rotation-speed hydraulic generator rotor has large capacity and high electric density, and the temperature rise of the hydraulic generator rotor is obviously higher than that of a conventional generator rotor, so that the temperature resistance requirement on materials used for the rotor is higher, and when the insulating materials cannot meet the temperature resistance requirement, the insulating materials can be rapidly aged and deteriorated, and the operation safety of a unit is influenced. The conventional hydraulic generator has F-level (not less than 155 ℃) temperature resistance requirement on insulating materials, and the high-altitude high-rotation-speed hydraulic generator rotor temperature rise has H-level (not less than 180 ℃) temperature resistance requirement on insulating materials, so that the conventional F-level insulating materials can not meet design requirements. The rotor structure is made of metal materials except insulating materials, and the metal materials have good heat resistance, so that the heat resistance problem of the insulating materials needs to be solved. Therefore, the H-level insulation structure of the rotor of the high-altitude high-rotation-speed hydraulic generator can achieve the H-level temperature resistance level of the insulation material, and can effectively solve the design requirement of the H-level temperature resistance of the rotor.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an H-level rotor insulation structure capable of meeting the design requirements of a high-altitude high-rotation-speed hydraulic generator. The rotor insulation structure has the advantages that the problems that the temperature resistance index of the existing rotor F-level insulation structure is low and the design requirement is not met are solved, the heat resistance of the rotor insulation structure is improved, the temperature resistance index of the rotor insulation structure reaches the H level, and the rotor F-level insulation structure has important significance for safe operation of high-altitude high-rotation-speed hydraulic generators.
The technical scheme adopted by the invention is as follows: the high altitude high rotation speed hydraulic generator rotor is composed of a magnetic pole coil, a magnetic pole iron core, a magnetic pole grounding insulator and a conformal insulator, wherein the magnetic pole grounding insulator is formed by processing an H-level bismaleimide glass cloth laminated board and covers the surface of the magnetic pole iron core, the magnetic pole coil (1) is composed of a plurality of turns of copper bars, H-level rubberized Nomex paper is used as magnetic pole inter-turn insulator between the copper bars, and an H-level bismaleimide glass cloth laminated board and an H-level glass cloth reinforced aramid felt which is impregnated with H-level resin are filled in a gap between the magnetic pole grounding insulator and the magnetic pole coil.
In the H-level insulation structure of the high-altitude high-rotation-speed hydraulic generator rotor, the thickness of the insulation of the magnetic pole to the ground is 3mm, and the overall dimension is equal to the circumference and the height of the magnetic pole core.
In the H-level insulating structure of the high-altitude high-rotation-speed hydro-generator rotor, the inter-turn insulation material of the magnetic pole is an insulating adhesive with the temperature resistance grade of H-level coated on the surface.
In the H-level insulation structure of the high-altitude high-rotation-speed hydraulic generator rotor, the conformal insulation is positioned between the magnetic pole ground insulation and the magnetic pole coil, the thickness is determined by the gap size between the magnetic pole ground insulation and the magnetic pole coil, the width is 200mm, and the height is equal to the height of the magnetic pole iron core.
In the H-level insulation structure of the high-altitude high-rotation-speed hydraulic generator rotor, the magnetic pole ground insulation is formed by combining two U-shaped plates and two long strips into a ring with a rectangular section, and the ring is adhered to the surface of the magnetic pole core by H-level resin.
In the H-level insulating structure of the high-altitude high-rotation-speed hydraulic generator rotor, the conformal insulation is formed by wrapping H-level glass cloth reinforced aramid felt impregnated resin on an H-level bismaleimide glass cloth laminated board in a U-shape, and a spacing plug is arranged between the magnetic pole ground insulation and the magnetic pole core (2) and has a spacing of 100mm.
In the H-level insulation structure of the high-altitude high-rotation-speed hydraulic generator rotor, the magnetic pole coils are formed by bonding a plurality of copper bars and magnetic pole inter-turn insulation in a high-temperature heating and pressurizing mode, the magnetic pole inter-turn insulation is located between two adjacent copper bars, the thickness is 0.25mm, and the overall dimension is equal to the length and the width of the copper bars 4.
In the H-level insulation structure of the high-altitude high-rotation-speed hydraulic generator rotor, the conformal insulation is formed by wrapping an H-level bismaleimide glass cloth laminated board with a glass cloth reinforced aramid felt impregnated with H-level resin, the glass cloth reinforced aramid felt and the H-level bismaleimide glass laminated board are 200mm wide, the height of the H-level bismaleimide glass laminated board is equal to the height of a magnetic pole iron core, the length of the glass cloth reinforced aramid felt is 2 times of the height of the iron core,
in the H-level insulation structure of the high-altitude high-rotation-speed hydraulic generator rotor, the adjacent interval of the conformal insulation is 100mm, and the conformal insulation is insulation in which the heating temperature is 135 ℃, the magnetic pole is insulated to the ground after 16 hours of heat preservation and the magnetic pole coil gap is in a full state after solidification.
Compared with the prior art, the invention has the beneficial effects that:
the H-level bismaleimide glass cloth laminated board is adopted for the ground insulation of the magnetic pole, is different from the conventional common Nomex paper winding structure, has good heat resistance, can reach the H level in temperature resistance level, has good mechanical strength and moisture resistance compared with the Nomex paper, and can effectively ensure the electrical and mechanical safety and long-term operation stability of the ground insulation of the magnetic pole.
The H-level sizing Nomex paper for the inter-turn insulation is coated with the H-level insulation glue on the surface, and compared with the traditional F-level insulation glue, the H-level sizing Nomex paper can ensure the bonding performance of the inter-turn insulation at a higher temperature, prevent the inter-turn insulation from being separated from and thrown out of copper bars, effectively prevent inter-turn short circuit of magnetic pole coils and ensure electrical safety.
Drawings
Fig. 1 is a side view of a rotor pole structure.
Fig. 2 is a top view of a rotor pole structure.
Fig. 3 is a schematic view of a magnetic pole coil structure.
Fig. 4 is a schematic diagram of a conformal insulation structure.
The figure indicates: 1-pole coils; 2-pole cores; 3-pole insulation to ground; 4-copper bars; 5-pole inter-turn insulation; 6-conformal insulation; 7-H level bismaleimide glass cloth laminated board; 8-H grade glass cloth reinforced aramid felt.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in fig. 1, the H-stage insulation structure of the high-altitude high-rotation-speed hydraulic generator rotor comprises a magnetic pole coil 1, a magnetic pole iron core 2, a magnetic pole grounding insulation 3 and a conformal insulation 6. The magnetic pole grounding insulator 3 is covered on the surface of the magnetic pole iron core 2, the thickness is 3mm, and the external dimension is equal to the circumference and the height of the magnetic pole iron core 2. The conformal insulation 6 is located between the pole ground insulation 3 and the pole coil 1, the thickness is determined by the gap size, and is usually between 3-5 mm, the width is 200mm, and the height is equal to the height of the pole core 2.
As shown in fig. 2, the magnetic pole grounding insulator 3 is a ring with a rectangular cross section formed by combining two U-shaped plates and two long strips, and is adhered to the surface of the magnetic pole core 2 by using H-level resin. The conformal material is formed by wrapping H-level bismaleimide glass cloth laminated board in a U shape after the H-level glass cloth reinforced aramid felt is impregnated with resin, and then spacing plugs are arranged between the magnetic pole ground insulation 3 and the magnetic pole core 2, wherein the spacing distance is 100mm.
As shown in fig. 3, the magnetic pole coils 1 are formed by bonding a plurality of copper bars 4 and magnetic pole inter-turn insulation 5 through high-temperature heating and pressurizing, wherein the magnetic pole inter-turn insulation 5 is positioned between two adjacent copper bars, has the thickness of 0.25mm, and has the same external dimension as the copper bars 4 and the same width.
As shown in fig. 4, the conformal insulation 6 is composed of an H-level bismaleimide glass cloth laminated board 7 and a glass cloth reinforced aramid felt 8 which is coated with an H-level resin. The glass cloth reinforced aramid felt 8 and the H-level bismaleimide glass cloth laminated board 7 are 200mm wide, the height of the H-level bismaleimide glass cloth laminated board 7 is equal to that of the magnetic pole core 2, the length of the glass cloth reinforced aramid felt 8 is 2 times that of the iron core, after the glass cloth reinforced aramid felt 8 is immersed in H-level resin, the glass cloth reinforced aramid felt 8 is folded in half along the length direction, the U-shaped is wrapped on the surface of the H-level bismaleimide glass laminated board 7, and after being wrapped, the glass cloth reinforced aramid felt 8 is plugged between the magnetic pole ground insulation 3 and the magnetic pole coil 1, and the interval between adjacent conformal materials is 100mm. The conformal insulation 6 is heated at a high temperature of 135 ℃ and is cured after heat preservation for 16 hours, and gaps between the magnetic pole grounding insulation 3 and the magnetic pole coil 1 are filled after curing.
Finally, the protective scope of the invention is not limited to the embodiments described above. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. The present invention is intended to include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. A H-level insulation structure of a high-altitude high-rotation-speed hydraulic generator rotor is characterized in that: the high-altitude high-rotation-speed hydraulic generator rotor is composed of a magnetic pole coil (1), a magnetic pole iron core (2), a magnetic pole grounding insulator (3) and a conformal insulator (6), wherein the magnetic pole grounding insulator (3) is formed by processing an H-level bismaleimide glass cloth laminated board (7) and covers the surface of the magnetic pole iron core (2), the magnetic pole coil (1) is composed of a plurality of turns of copper bars (4), H-level rubberized Nomex paper is used as magnetic pole inter-turn insulator (5) between the copper bars (4), and an H-level bismaleimide glass cloth laminated board (7) and an H-level glass cloth reinforced aramid felt (8) which is impregnated with H-level resin are filled in a gap between the magnetic pole grounding insulator (3) and the magnetic pole coil (1).
2. The H-stage insulation structure of a high-altitude high-rotation-speed hydraulic generator rotor according to claim 1, wherein the H-stage insulation structure is characterized in that: the thickness of the magnetic pole grounding insulator (3) is 3mm, and the external dimension is equal to the perimeter and the height of the magnetic pole core (2).
3. The H-stage insulation structure of a high-altitude high-rotation-speed hydraulic generator rotor according to claim 1, wherein the H-stage insulation structure is characterized in that: the inter-turn insulation (5) is made of insulating glue with the temperature resistance grade of H-level.
4. The H-stage insulation structure of a high-altitude high-rotation-speed hydraulic generator rotor according to claim 1, wherein the H-stage insulation structure is characterized in that: the conformal insulation (6) is positioned between the magnetic pole ground insulation (3) and the magnetic pole coil (1), the thickness is determined by the gap size between the magnetic pole ground insulation (3) and the magnetic pole coil (1), the width is usually between 3mm and 5mm, and the height is equal to the height of the magnetic pole iron core (2).
5. The H-stage insulation structure of a high-altitude high-rotation-speed hydraulic generator rotor according to claim 1, wherein the H-stage insulation structure is characterized in that: the magnetic pole grounding insulator (3) is formed by combining two U-shaped plates and two long plates into a ring with a rectangular cross section, and the ring is bonded on the surface of the magnetic pole core (2) by using H-level resin.
6. The H-stage insulation structure of a high-altitude high-rotation-speed hydraulic generator rotor according to claim 1, wherein the H-stage insulation structure is characterized in that: the conformal insulation (6) is formed by wrapping H-level glass cloth reinforced aramid felt impregnated resin on an H-level bismaleimide glass cloth laminated board in a U-shaped manner, and a spacing plug is arranged between the magnetic pole ground insulation (3) and the magnetic pole iron core (2) and has a spacing of 100mm.
7. The H-stage insulation structure of a high-altitude high-rotation-speed hydraulic generator rotor according to claim 1, wherein the H-stage insulation structure is characterized in that: the magnetic pole coil (1) is formed by bonding a plurality of copper bars (4) and magnetic pole inter-turn insulation (5) together through high-temperature heating and pressurizing, the magnetic pole inter-turn insulation (5) is positioned between two adjacent copper bars, the thickness is 0.25mm, and the overall dimension is equal to the length and the width of the copper bars 4.
8. The H-stage insulation structure of a high-altitude high-rotation-speed hydraulic generator rotor according to claim 1, wherein the H-stage insulation structure is characterized in that: the conformal insulation (6) is composed of a glass cloth reinforced aramid felt (8) which is wrapped by an H-level bismaleimide glass cloth laminated board (7) and impregnated with H-level resin, the glass cloth reinforced aramid felt (8) and the H-level bismaleimide glass cloth laminated board (7) are 200mm wide, the height of the H-level bismaleimide glass cloth laminated board (7) is equal to the height of the magnetic pole iron core (2), and the length of the glass cloth reinforced aramid felt (8) is 2 times of the height of the iron core.
9. The H-stage insulation structure of a high-altitude high-rotation-speed hydraulic generator rotor according to claim 1, wherein the H-stage insulation structure is characterized in that: the adjacent interval of the conformal insulation (6) is 100mm, the conformal insulation (6) is composed of H-level high temperature resistant glue and glass cloth reinforced aramid felt, the heating temperature of the H-level high temperature resistant glue and glass cloth reinforced aramid felt is 135 ℃, and after the H-level high temperature resistant glue and glass cloth reinforced aramid felt are insulated for 16 hours, the H-level high temperature resistant glue is cured to form insulation in a state that gaps between the magnetic pole ground insulation (3) and the magnetic pole coil (1) are filled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310632920.4A CN116488378A (en) | 2023-05-31 | 2023-05-31 | H-level insulation structure of high-altitude high-rotation-speed hydraulic generator rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310632920.4A CN116488378A (en) | 2023-05-31 | 2023-05-31 | H-level insulation structure of high-altitude high-rotation-speed hydraulic generator rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116488378A true CN116488378A (en) | 2023-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310632920.4A Pending CN116488378A (en) | 2023-05-31 | 2023-05-31 | H-level insulation structure of high-altitude high-rotation-speed hydraulic generator rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116488378A (en) |
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2023
- 2023-05-31 CN CN202310632920.4A patent/CN116488378A/en active Pending
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