CN112671126A - Tripod slot wedge structure for rotor of aero-generator - Google Patents
Tripod slot wedge structure for rotor of aero-generator Download PDFInfo
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- CN112671126A CN112671126A CN202110109890.XA CN202110109890A CN112671126A CN 112671126 A CN112671126 A CN 112671126A CN 202110109890 A CN202110109890 A CN 202110109890A CN 112671126 A CN112671126 A CN 112671126A
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- tripod
- slot wedge
- heat dissipation
- generator rotor
- wedge structure
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Abstract
The invention relates to a tripod slot wedge structure for an aero-generator rotor, which comprises a tripod main body (1) consisting of two side walls (1 a) and a top plate (1 b), wherein a heat dissipation through hole (2) is formed in the tripod main body (1), two bosses (3) are respectively connected with two ends of the top plate (1 b), a group of heat dissipation fins (4) are arranged on the top plate (1 b) between the two bosses (3), a groove (5) is formed between every two adjacent heat dissipation fins (4), two ends of the tripod main body (1) are respectively connected with a clamping block (6) extending along the axial direction, and the lower surface of the clamping block (6) is flush with the lower surface of the top plate (1 b). The triangular bracket slot wedge structure has the advantages that the heat dissipation and the reliability of the triangular bracket slot wedge structure can be effectively improved, the eddy current loss is reduced, the potential safety hazard caused by the flying-out of the triangular bracket slot wedge structure at high speed and high temperature is avoided, and the normal operation of a generator is ensured.
Description
Technical Field
The invention relates to the technical field of aviation high-speed generators, in particular to a tripod slot wedge structure for an aviation generator rotor.
Background
The generator rotor structure generally comprises a rotor core, a coil, a damping end plate, an insulating plate, a guard ring, a tripod slot wedge and the like. The triangular frame slot wedge is located between the rotor and the coil and has the functions of positioning and fixing the coil.
At present, the tripod slot wedges of the existing generator rotor mostly adopt the structure as shown in fig. 1, and comprise a tripod body, the longitudinal section of the tripod body is triangular, a through hole is formed in the tripod body, a rectangular area is hollowed out at the middle part of the top end of the tripod slot wedge structure, so that the eddy current loss is reduced, and bosses are respectively fixed on the tripod body at two ends of the rectangular hollowed area. However, because the coil belongs to a part of the rotor which mainly generates heat and transfers the heat to the triangular frame slot wedge, and two axial ends of the triangular frame slot wedge are not fixed, the triangular frame slot wedge is easy to separate from the rotor component and fly out at high speed and high temperature, and particularly for a large-capacity generator, more heat is generated, and the requirement on heat dissipation of a generator rotor is higher.
Disclosure of Invention
The invention aims to solve the problems of poor heat dissipation and low reliability of the existing tripod slot wedge structure, and provides the tripod slot wedge structure for the rotor of the aero-generator, which can effectively improve the heat dissipation and the reliability of the tripod slot wedge structure, reduce eddy current loss, avoid potential safety hazards caused by the fact that the tripod slot wedge structure flies out at high speed and high temperature, and ensure the normal operation of the generator.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an aerogenerator is tripod slot wedge structure for rotor, includes the tripod main part of compriseing two lateral walls and a roof, is equipped with a heat dissipation through-hole in the tripod main part, and the both ends of roof respectively link has a boss, are located to be equipped with a set of radiating fin on the roof between two bosss, are equipped with a recess between two adjacent radiating fin, and a fixture block that extends along the axial is still connected respectively at the both ends of tripod main part, and the lower surface of fixture block flushes with the lower surface of roof.
Furthermore, the longitudinal section of the heat dissipation through hole is butterfly-shaped, wherein the shaft is superposed with the axis of the tripod main body so as to form air stirring and accelerate the gas flow.
Further, the radiating fins are arranged along the axial array of the tripod body.
Furthermore, the upper surface of the boss is arc-shaped, the radian of the upper surface of the boss is the same as that of the damping plates of the generator rotor, and the bosses on the two sides are just clamped between the damping plates at the two ends.
Further, the tripod body is made of 2A12-T4 high-strength aluminum, so that heat dissipation of the rotor is accelerated.
Further, the thickness of the radiating fin is 1-2 mm, and the width of the groove is 1-2 mm.
Further, the vertical distance from the bottom of the groove to the heat dissipation through hole is not less than 1.5 mm.
Compared with the prior art, the invention has the advantages that:
(1) compared with the traditional tripod slot wedge structure, the triangular bracket slot wedge structure has the advantages that the eddy current loss is reduced by the square slot with the hollow top end, and meanwhile, the radiating fin structure is additionally arranged, so that the radiating effect of the triangular bracket slot wedge is effectively improved, and the triangular bracket slot wedge structure is particularly critical to a large-capacity aero-generator with large loss and large heat productivity;
(2) the butterfly-shaped heat dissipation through holes can improve the heat dissipation efficiency, and when air enters the through holes, the structure can enable the air to rotate, stir the air like an axial flow fan, and accelerate the flow rate of the air;
(3) the triangular frame slot wedge structure of the device is preferably made of 2A12-T4 high-strength aluminum, and the problem of rotor heat dissipation can be better solved due to the fact that the aluminum material is large in heat dissipation coefficient;
(4) the invention is beneficial to thinning the wall thickness of the tripod by adopting the high-strength aluminum material, and meanwhile, the aluminum material has low mass density, thereby being more beneficial to the weight reduction requirement of the rotor component;
(5) the end clamping blocks are arranged at the two axial ends of the triangular block slot wedge structure, so that the triangular block slot wedge structure is beneficial to effectively keeping in a rotor assembly without flying out under a high-speed and high-temperature environment.
Drawings
FIG. 1 is a schematic structural view of a tripod slot wedge in the prior art;
FIG. 2 is a three-dimensional structure diagram of a tripod slot wedge structure for an aircraft generator rotor according to the present invention;
FIG. 3 is a cross-sectional view of a tripod slot wedge structure for an aircraft generator rotor according to the present invention;
FIG. 4 is a side view of a tripod slot wedge structure for an aircraft generator rotor of the present invention;
FIG. 5 is a schematic view of the assembly of the tripod slot wedge structure of the present invention with a generator rotor;
fig. 6 is a partially enlarged view a of fig. 3.
Detailed Description
Example 1
In order to make the present invention more clear, the following description of a tripod slot wedge structure for an aircraft generator rotor according to the present invention is made with reference to the accompanying drawings, and the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.
As shown in fig. 2~4, a tripod slot wedge structure for aerogenerator rotor includes tripod main part 1 of constituteing by two lateral walls 1a and a roof 1b, and smooth transition links to each other between lateral wall 1a and the roof 1b, is equipped with a heat dissipation through-hole 2 in the tripod main part 1, and the both ends of roof 1b respectively link to have a boss 3, its characterized in that:
a group of radiating fins 4 are arranged on the top plate 1b between the two bosses 3, and the radiating fins 4 are arrayed along the axial direction of the tripod main body 1;
a groove 5 is arranged between every two adjacent radiating fins 4, two ends of the tripod main body 1 are respectively connected with a clamping block 6 extending along the axial direction, and the lower surface of the clamping block 6 is flush with the lower surface of the top plate 1 b;
referring to fig. 2, 3, 4 and 5, the upper surface of the boss 3 is arc-shaped, the radian of the upper surface is the same as that of the damping plates 7 of the generator rotor, and the bosses 3 on both sides are just clamped between the damping plates 7 on both ends;
the thickness of the radiating fins 4 is 1-2 mm, the width of the grooves 5 is 1-2 mm, and the vertical distance from the bottoms of the grooves 5 to the radiating through holes 2 is 1.5 mm.
Referring to fig. 6, in the present invention, the triangular frame wedge is made of 2a12-T4 aluminum, which has a large heat dissipation coefficient and a good heat dissipation effect, and a plurality of layers of heat dissipation fins 4 are arranged in an axial array at the middle of the top end of the triangular frame wedge, as shown in fig. 2 and 3, according to finite element simulation results, the thickness recommended value of the triangular frame fins is 1-2 mm, the width recommended value of the hollowed-out grooves is 1-2 mm, and the depth of the grooves is determined by the heat dissipation through holes, generally, because the stress borne by the triangular frame is mainly axial extrusion force and centrifugal force during the high-speed high-temperature operation of the rotor, the minimum distance between the heat dissipation through holes and the bottom of the grooves is ensured to be more than 1.5mm as much as possible at 15000 rpm.
Referring to fig. 5, the axial upper surfaces of the end fixture blocks 6 at the two sides of the tripod body are matched with the inner side surface of the guard ring 8, so that the tripod slot wedge is fixed, the circumferential size of the whole rotor is ensured, and meanwhile, the end fixture blocks are required to be ensured to have certain thickness so as to meet the strength requirement. In this embodiment, preferably, the lower surface of the end fixture block is flush with the upper surface of the heat dissipation through hole.
Referring to fig. 2 and 5, the axial outer side surface of the boss 3 between the end fixture block 6 and the heat dissipating fin 4 is flush with the damping plate 7, the outer circumferential surface of the boss 3 is consistent with or slightly smaller than the outer diameter of the rotor assembly, and the thickness of the boss 3 should be as thin as possible on the basis of meeting the strength condition so as to increase the axial total length of the heat dissipating fin 4.
Referring to fig. 2 and 5, a side wall 1a of the tripod body 1 is arranged between two adjacent coils 9, and a small gap should be reserved between the side wall 1a and the side wall of the coil 9 under the premise of considering insulation and thermal expansion, so that the tripod can be embedded moderately, and the shaping and fixing of the coil are facilitated.
Referring to fig. 2, the butterfly-shaped heat dissipation through holes 2 can enable the inner cavity to form a space similar to a fan, when air passes through, the air can rotate, the air is stirred like an axial fan, and the butterfly-shaped heat dissipation through holes are used as ventilation pipelines of the main rotor, so that ventilation and heat dissipation of air on two sides of the rotor are accelerated, and on the other hand, the butterfly-shaped heat dissipation through holes are used as lightening holes on the premise of not influencing the performance of the motor. The thin wall thickness of the lightening holes and the side wall also meets the strength condition, and in the embodiment, the thin wall thickness at the thinnest part is preferably ensured to be more than 1.5mm at the overspeed of 15000rpm as far as possible.
The triangular frame slot wedge structure is reasonable and practical in design, low in manufacturing cost, practical, safe and reliable, and compared with the triangular frame slot wedge structure of the existing product, the triangular frame slot wedge structure has the advantages that the outer surface area of heat exchange is increased by adopting the fin structure, namely the contact area with air is increased, so that the purpose of improving the heat exchange efficiency is achieved, the eddy current loss can be effectively reduced, and the defects of poor heat dissipation effect and the like of the triangular frame slot wedge of the existing product can be improved; the two ends of the triangular block slot wedge are protruded, so that the triangular block slot wedge is fixed, and the reliability of a product is improved; in addition, the material is selected from 2A12-T4 high-strength aluminum, the heat dissipation coefficient is large, the heat dissipation problem of the rotor is solved better, and meanwhile, the overall weight of the rotor is reduced on the premise that the performance of each aspect of the rotor is met.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides an aerogenerator is tripod slot wedge structure for rotor, includes tripod main part (1) of constituteing by two lateral walls (1 a) and a roof (1 b), is equipped with a heat dissipation through-hole (2) in tripod main part (1), and the both ends of roof (1 b) respectively link there is a boss (3), its characterized in that:
be located and be equipped with a set of radiating fin (4) on roof (1 b) between two boss (3), be equipped with one recess (5) between two adjacent radiating fin (4), the fixture block (6) of extending along the axial is still connected respectively at the both ends of tripod main part (1), and the lower surface of fixture block (6) flushes with the lower surface of roof (1 b).
2. The structure of a triangular frame wedge for an aircraft generator rotor according to claim 1, wherein:
the longitudinal section of the heat dissipation through hole (2) is butterfly-shaped, and the central axis of the heat dissipation through hole coincides with the axis of the tripod main body (1).
3. The structure of a tripod slot wedge for an aircraft generator rotor according to claim 1 or 2, wherein:
the radiating fins (4) are arranged along the axial direction of the tripod main body (1) in an array manner.
4. The structure of a tripod slot wedge for an aircraft generator rotor according to claim 1 or 2, wherein:
the upper surface of the boss (3) is arc-shaped, the radian of the upper surface is the same as that of the damping plates (7) of the generator rotor, and the bosses (3) on two sides are just clamped between the damping plates (7) on two ends.
5. The structure of a tripod slot wedge for an aircraft generator rotor according to claim 1 or 2, wherein:
the tripod body (1) is made of 2A12-T4 high-strength aluminum.
6. The structure of a tripod slot wedge for an aircraft generator rotor according to claim 1 or 2, wherein:
the thickness of the radiating fins (4) is 1-2 mm, and the width of the grooves (5) is 1-2 mm.
7. The structure of a tripod slot wedge for an aircraft generator rotor according to claim 1 or 2, wherein:
and the vertical distance from the bottom of the groove (5) to the heat dissipation through hole (2) is not less than 1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110109890.XA CN112671126A (en) | 2021-01-27 | 2021-01-27 | Tripod slot wedge structure for rotor of aero-generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110109890.XA CN112671126A (en) | 2021-01-27 | 2021-01-27 | Tripod slot wedge structure for rotor of aero-generator |
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| Publication Number | Publication Date |
|---|---|
| CN112671126A true CN112671126A (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110109890.XA Pending CN112671126A (en) | 2021-01-27 | 2021-01-27 | Tripod slot wedge structure for rotor of aero-generator |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3866070A (en) * | 1971-12-27 | 1975-02-11 | Asea Ab | Turbo-generator of the radial slot type |
| US5550417A (en) * | 1995-07-03 | 1996-08-27 | Dresser-Rand Company | Amortisseur winding arrangement, in a rotor for electrical, rotating equipment |
| JPH1155885A (en) * | 1997-08-05 | 1999-02-26 | Hitachi Ltd | Motor-driven blower and electric cleaner using the same |
| CN101453148A (en) * | 2007-12-07 | 2009-06-10 | 三菱电机株式会社 | Coil- slot wedge inserting device, coil-slot wedge inserting method and slot wedge |
| CN101752931A (en) * | 2008-12-02 | 2010-06-23 | 哈米尔顿森德斯特兰德公司 | Generator wedge with reduced eddy current loss |
| CN201839179U (en) * | 2010-10-28 | 2011-05-18 | 陕西航空电气有限责任公司 | Rotor structure of aircraft generator |
| CN103532269A (en) * | 2013-10-11 | 2014-01-22 | 陕西航空电气有限责任公司 | Aviation high-speed generator rotor structure |
| CN104104171A (en) * | 2013-04-04 | 2014-10-15 | 哈米尔顿森德斯特兰德公司 | Electric machine rotor |
| US20160211716A1 (en) * | 2015-01-16 | 2016-07-21 | Hamilton Sundstrand Corporation | Rotor wedge with arms |
| US20190103777A1 (en) * | 2017-09-29 | 2019-04-04 | Hamilton Sundstrand Corporation | Rotor wedges and methods of making rotor wedges |
-
2021
- 2021-01-27 CN CN202110109890.XA patent/CN112671126A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3866070A (en) * | 1971-12-27 | 1975-02-11 | Asea Ab | Turbo-generator of the radial slot type |
| US5550417A (en) * | 1995-07-03 | 1996-08-27 | Dresser-Rand Company | Amortisseur winding arrangement, in a rotor for electrical, rotating equipment |
| JPH1155885A (en) * | 1997-08-05 | 1999-02-26 | Hitachi Ltd | Motor-driven blower and electric cleaner using the same |
| CN101453148A (en) * | 2007-12-07 | 2009-06-10 | 三菱电机株式会社 | Coil- slot wedge inserting device, coil-slot wedge inserting method and slot wedge |
| CN101752931A (en) * | 2008-12-02 | 2010-06-23 | 哈米尔顿森德斯特兰德公司 | Generator wedge with reduced eddy current loss |
| CN201839179U (en) * | 2010-10-28 | 2011-05-18 | 陕西航空电气有限责任公司 | Rotor structure of aircraft generator |
| CN104104171A (en) * | 2013-04-04 | 2014-10-15 | 哈米尔顿森德斯特兰德公司 | Electric machine rotor |
| CN103532269A (en) * | 2013-10-11 | 2014-01-22 | 陕西航空电气有限责任公司 | Aviation high-speed generator rotor structure |
| US20160211716A1 (en) * | 2015-01-16 | 2016-07-21 | Hamilton Sundstrand Corporation | Rotor wedge with arms |
| US20190103777A1 (en) * | 2017-09-29 | 2019-04-04 | Hamilton Sundstrand Corporation | Rotor wedges and methods of making rotor wedges |
Non-Patent Citations (1)
| Title |
|---|
| 薛易;李伟力;王立坤;: "转子导磁导电槽楔材料对汽轮发电机参数和转子表面损耗影响的研究", 中国电机工程学报, no. 07 * |
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