CN211046595U - Radiating fin type outer rotor motor and stratospheric airship - Google Patents
Radiating fin type outer rotor motor and stratospheric airship Download PDFInfo
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- CN211046595U CN211046595U CN201922102734.1U CN201922102734U CN211046595U CN 211046595 U CN211046595 U CN 211046595U CN 201922102734 U CN201922102734 U CN 201922102734U CN 211046595 U CN211046595 U CN 211046595U
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Abstract
The utility model relates to the field of airship heat dissipation, and provides a heat dissipation sheet type outer rotor motor and a stratospheric airship, wherein the heat dissipation sheet type outer rotor motor comprises an inner stator assembly, an outer rotor assembly, an inner stator fixing device and an outer rotor supporting device; the outer rotor assembly comprises an outer rotor, permanent magnet blocks arranged on the inner surface of the outer rotor, a first cover plate and a second cover plate, the first cover plate and the second cover plate are respectively fixed at two ends of the outer rotor along the axial direction, and the outer rotor, the first cover plate and the second cover plate form a cavity and surround the inner stator assembly; the first cover plate is connected with the outer rotor supporting device; the outer surface of the outer rotor is in a radiating fin shape, or the outer rotor component further comprises a radiating fin which is fixed on the outer surface of the outer rotor; the inner stator fixing device is connected with the inner stator assembly. The utility model discloses an increase the area of external rotor surface, do benefit to the heat of permanent magnet piece and locate the radiation to outer empty cryrogenic, prevent the demagnetization inefficacy of permanent magnet piece.
Description
Technical Field
The utility model relates to a motor heat dissipation field, concretely relates to motor device of stratospheric airship.
Background
The stratospheric airship flies in the stratospheric environment, and the flowing heat dissipation effect of air is poor due to the thin air. The traditional motor heat dissipation method generally needs to add a fan and an air duct to improve the air flow heat dissipation efficiency, but the weight and the energy consumption are increased, and the complexity of the system is improved.
At present, the developed stratospheric airship propulsion motor mostly adopts a permanent magnet inner rotor mode, and heat of an inner rotor permanent magnet of the motor is accumulated in a closed motor stator cavity after being heated, so that the heat is difficult to be led out, and the temperature of the inner rotor is high. The highest working temperature of the sintered Nd-Fe-B permanent magnet is 150 ℃, and when the highest temperature of the Nd-Fe-B permanent magnet exceeds 150 ℃, the motor loses power due to demagnetization.
The heat dissipation of the motor of the propulsion system of the stratospheric airship is an urgent problem to be solved.
The statements in the background section are merely technical equivalents which may be known to a person skilled in the art and do not, of course, represent prior art in this field.
SUMMERY OF THE UTILITY MODEL
To the radiating problem of stratospheric airship motor that prior art exists, the utility model aims at providing a fin formula external rotor electric machine, include: the inner stator assembly, the outer rotor assembly, the inner stator fixing device and the outer rotor supporting device;
the outer rotor assembly comprises an outer rotor, permanent magnet blocks arranged on the inner surface of the outer rotor, a first cover plate and a second cover plate, the first cover plate and the second cover plate are respectively fixed at two ends of the outer rotor along the axial direction, and the outer rotor, the first cover plate and the second cover plate form a cavity and surround the inner stator assembly; the first cover plate is connected with the outer rotor supporting device; the outer surface of the outer rotor is in a radiating fin shape, or the outer rotor component further comprises a radiating fin which is fixed on the outer surface of the outer rotor;
the inner stator fixing device is connected with the inner stator assembly.
The utility model provides a fin type external rotor electric machine, with the external radiation area increase of the surface of external rotor, the direct surface through the external rotor of permanent magnet piece is with the heat to the deep cold department radiation of outer cavity, promotes the radiating efficiency of permanent magnet piece.
Further, the inner stator assembly includes an inner stator and an inner stator slot winding disposed on the inner stator.
Further, the inner stator fixing device comprises an inner stator shaft fixing support frame, an inner stator shaft and an inner stator shaft bearing, the inner stator shaft penetrates through the center of the second cover plate and is connected with the inner stator shaft fixing support frame and the inner stator assembly, and the inner stator shaft bearing is arranged on the inner stator shaft and is fixed on the second cover plate.
Furthermore, the inner stator shaft bearing adopts a centripetal thrust bearing. The radial thrust bearing can simultaneously bear radial force and axial force with a large range, and is suitable for an airship motor needing the axial force. When the motor rotates, the inner ring of the inner stator shaft bearing and the inner stator shaft are fixed, and the outer ring of the inner stator shaft bearing rotates along with the second cover plate.
Furthermore, the outer rotor supporting device comprises an outer rotor shaft fixing support frame, an outer rotor shaft and an outer rotor shaft bearing, the outer rotor shaft is fixed at the center of the first cover plate and connected with the first cover plate and the outer rotor shaft fixing support frame, and the outer rotor shaft bearing is arranged on the outer rotor shaft and fixed on the outer rotor shaft fixing support frame.
Further, the outer rotor shaft bearing is a radial thrust bearing. The radial thrust bearing can simultaneously bear radial force and axial force with a large range, and is suitable for an airship motor needing the axial force. The inner ring of the outer rotor shaft bearing is fixedly connected with the outer rotor shaft, the outer ring of the outer rotor shaft bearing is fixedly connected with the outer rotor shaft fixing support frame, when the motor rotates, the inner ring of the outer rotor shaft bearing and the outer rotor shaft rotate along with the first cover plate, and the outer ring of the outer rotor shaft bearing and the outer rotor shaft fixing support frame are fixed.
Further, the first cover plate and the outer rotor shaft are integrally formed.
Furthermore, the first cover plate and the second cover plate are fans with blades, the first cover plate and the second cover plate rotate along with the outer rotor to form airflow in a fixed direction, and the airflow enters the cavity through the first cover plate and is discharged out of the cavity through the second cover plate. Two cover plates of the outer rotor are arranged in a fan mode with blades, one surface of each cover plate sucks cooling air along with the rotation of the outer rotor of the motor, and the other surface of each cover plate discharges hot air in the cavity, so that air is forced to convect, and a heat dissipation effect is achieved.
Further, the first cover plate comprises outer ring fan blades, middle ring reinforcing ribs and inner ring fan blades; the middle ring reinforcing ribs are arranged between the outer ring fan blades and the inner ring fan blades. The middle ring reinforcing ribs are used for enhancing the mechanical strength and rigidity of the first cover plate.
Further, the second cover plate comprises outer ring fan blades, middle ring reinforcing ribs, inner ring fan blades, inner ring reinforcing ribs and shaft holes; the shaft hole is arranged at the center of the second cover plate; the inner ring reinforcing ribs are arranged between the inner ring fan blades and the shaft hole, and the middle ring reinforcing ribs are arranged between the outer ring fan blades and the inner ring fan blades. The inner ring reinforcing ribs and the middle ring reinforcing ribs are used for enhancing the mechanical strength and rigidity of the second cover plate.
Furthermore, the permanent magnet blocks adopt neodymium iron boron permanent magnet blocks or samarium cobalt permanent magnet blocks.
Furthermore, samarium cobalt permanent magnet blocks are adopted as the permanent magnet blocks.
The maximum magnetic energy product of the Nd-Fe-B permanent magnet is 260BHmax/(kj/m2) But its maximum working temperature is only 150 ℃; the maximum magnetic energy product of samarium cobalt permanent magnet is reduced to 200BHmax/(kj/m2) But the maximum working temperature can reach 300 ℃, so that the motor can work under severer environmental conditions.
The utility model also provides a stratospheric airship, include the fin type external rotor electric machine.
The utility model has the advantages that:
the utility model discloses to the motor of the stratospheric airship of being in outer empty cryogenic environment, set the external rotor surface of motor to the fin shape or set up the fin at the surface of outer rotor, increased the outside thermal radiating area in space of external rotor, be favorable to the heat dissipation of the permanent magnet iron plate on the external rotor, prevent the demagnetization of permanent magnet iron plate.
The utility model discloses still set the apron of external rotor both sides to the fan, carry out forced air cooling to external rotor inner chamber and internal stator electromagnetic winding, greatly improved external rotor inner chamber and internal stator electromagnetic winding's thermal environment, be favorable to the heat dissipation of the permanent magnet piece on the external rotor.
The utility model discloses a permanent magnet iron of samarium cobalt material can bear higher highest operating temperature, reaches 300 ℃, makes the motor work under the more abominable hot environmental condition.
The utility model discloses through foretell improvement, showing and improving the adaptability that the motor lasts the work under the stratosphere environment, stopped because of working under the stratosphere environment, the demagnetization that the high fever of the inside permanent magnet piece of motor arouses loses power the phenomenon.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of a fin type outer rotor motor according to a first embodiment;
fig. 2 is a longitudinal sectional view of outer rotor 7 of the first embodiment, in which only an upper structure symmetrical to a lower portion thereof is shown;
fig. 3 is a schematic structural view of the first cover plate 11;
fig. 4 is a schematic structural view of the second cover plate 4;
fig. 5 is a schematic structural view of a fin type outer rotor motor according to a second embodiment;
fig. 6 is a longitudinal sectional view of outer rotor 7 and heat radiating fins 13 of the second embodiment, in which only an upper structure symmetrical with a lower portion thereof is shown;
the fan comprises a main shaft, an inner stator, an outer rotor, an inner stator shaft, an outer rotor shaft, an inner rotor shaft bearing, a first cover plate, an inner stator shaft fixing support frame, a second cover plate, an inner stator tooth groove winding, a permanent magnet block, a 7 outer rotor, an outer rotor shaft fixing support frame, a rotor shaft bearing, a first cover plate, a second cover plate, a stator, a heat radiating fin, a fan blade, a 15 shaft hole, a middle ring reinforcing rib, a 17 inner ring fan blade, an inner ring reinforcing rib, a 18 inner ring reinforcing rib, a fan blade, a 20 middle ring reinforcing rib.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection, either mechanically, electrically, or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As a first embodiment of the present invention, a fin type external rotor motor is shown, including: the inner stator assembly, the outer rotor assembly, the inner stator fixing device and the outer rotor supporting device.
As shown in fig. 1, the inner stator assembly includes an inner stator 12 and an inner stator slot winding 5 fixed to the inner stator.
As shown in fig. 1, the outer rotor assembly includes permanent magnet blocks 6, an outer rotor 7, a first cover plate 11 and a second cover plate 4, the first cover plate 11 and the second cover plate 4 are respectively fixed at both ends of the outer rotor 7 in the axial direction, the outer rotor 7, the first cover plate 11 and the second cover plate 4 form a cavity and surround the inner stator 12 and the inner stator slot winding 5. As can be seen from fig. 2, the outer surface of outer rotor 7 is provided in the shape of a fin, where the hatched portion represents a cross section of outer rotor 7, and the outer surface of outer rotor 7 is seen in the shape of a fin from the cross section. The permanent magnet 6 is arranged on the inner surface of the outer rotor 7 corresponding to the internal stator tooth space winding 5, the permanent magnet 6 can be neodymium iron boron permanent magnet or samarium cobalt permanent magnet, preferably samarium cobalt permanent magnet, and the maximum working temperature of the samarium cobalt permanent magnet is 300 ℃.
As a preferred embodiment, as shown in fig. 3, the first cover plate 11 is a fan with blades, and the specific structure includes an outer ring blade 19, a middle ring rib 20 and an inner ring blade 21, and the middle ring rib 20 is disposed between the outer ring blade 19 and the inner ring blade 21 for enhancing the mechanical strength and rigidity of the first cover plate 11. As shown in fig. 4, the second cover plate 4 is a fan with blades, and the specific structure includes an outer ring fan blade 14, a middle ring reinforcing rib 16, an inner ring fan blade 17, an inner ring reinforcing rib 18 and a shaft hole 15; the shaft hole 15 is arranged at the center of the second cover plate 4, the inner stator shaft 2 of the inner stator fixing device penetrates through the shaft hole 15 to fix the inner stator 12, and the outer ring of the inner stator shaft bearing 3 on the inner stator shaft 2 is fixed with the shaft hole 15; the inner ring reinforcing ribs 18 are arranged between the inner ring fan blades 17 and the shaft hole 15, the middle ring reinforcing ribs 16 are arranged between the outer ring fan blades 14 and the inner ring fan blades 17, and the inner ring reinforcing ribs 18 and the middle ring reinforcing ribs 16 are used for enhancing the mechanical strength and rigidity of the second cover plate 4.
As shown in fig. 1, the inner stator fixing device for fixing an inner stator assembly includes an inner stator shaft fixing support frame 1, an inner stator shaft 2 and an inner stator shaft bearing 3, wherein the inner stator shaft 2 passes through a shaft hole 15 at the center of a second cover plate 4 and is connected with the inner stator shaft fixing support frame 1 and an inner stator 12; the inner stator shaft bearing 3 adopts a centripetal thrust bearing, the inner ring of the inner stator shaft bearing 3 is fixed on the inner stator shaft 2, and the outer ring of the inner stator shaft bearing 3 is fixed with the shaft hole 15 of the second cover plate 4.
As shown in fig. 1, the outer rotor supporting device is used for supporting the rotation of the outer rotor assembly, and includes an outer rotor shaft fixing support frame 8, an outer rotor shaft 9 and an outer rotor shaft bearing 10, the outer rotor shaft 9 is fixed at the center of a first cover plate 11, and is connected with the first cover plate 11 and the outer rotor shaft fixing support frame 8, the outer rotor shaft 9 and the first cover plate 11 can be integrally formed or detachably connected, the outer rotor shaft bearing 10 adopts a radial thrust bearing, the inner ring of the outer rotor shaft bearing 10 is fixed on the outer rotor shaft 9, and the outer ring of the outer rotor shaft bearing 10 is fixed on the outer rotor shaft fixing support frame 8.
Under the action of the permanent magnet 6 and the inner stator tooth groove assembly 5, the inner stator 12 is fixed under the action of the inner stator shaft 2 and the inner stator shaft fixing support frame 1, and the outer rotor 7 rotates around the inner stator 12 and drives the first cover plate 11, the second cover plate 4 and the outer rotor shaft 9 to rotate. The permanent magnet blocks 6 and the inner stator tooth groove windings 5 generate heat in the rotating process of the outer rotor 7, the permanent magnet blocks 6 transmit the heat to the outer rotor 7, and the outer surface of the outer rotor 7 is in the shape of cooling fins, so that the heat can be rapidly radiated to an outer air deep cooling position. Meanwhile, the first cover plate 11 sucks cold air W1 in the rotating process, the cold air W1 enters a cavity formed by the outer rotor 7, the first cover plate 11 and the second cover plate 4, the permanent magnet 6, the inner stator 12 and the inner stator tooth space winding 5 are cooled, and the cold air W1 forms hot air W2 after heat exchange; the hot air W2 is discharged out of the chamber by the second cover plate 4, thereby forming an air flow pattern with strong exhaust cooling. By the mode, the adaptability of the motor to continuously work in the stratosphere environment is obviously improved, and the phenomenon of demagnetization loss caused by high heat of permanent magnet blocks in the motor working in the stratosphere environment is avoided.
As a second embodiment of the present invention, a fin type external rotor motor is shown, the structure of the external rotor motor of the second embodiment is basically the same as that of the first embodiment, and the different places are: as shown in fig. 5, the fin type outer rotor motor further includes fins 13 fixed to an outer surface of the outer rotor 7. As shown in fig. 6, outer rotor 7 has a cylindrical structure, and the hatched portion inclined to the left in the drawing indicates a cross section of outer rotor 7; the radiating fins 13 are cylindrical radiators, the hatched portions inclined to the right in the drawing indicate the cross sections of the radiating fins 13, the inner rings of the radiating fins 13 are directly sleeved on the outer rings of the outer rotor 7, and compared with the process of directly processing the outer surfaces of the outer rotor 7 into the shapes of the radiating fins in the first embodiment, the processing difficulty can be reduced by using the cylindrical radiators. The radiating fins 13 increase the area of the outer surface of the outer rotor 7, the permanent magnet blocks 6 generate heat in the rotating process, the heat is transferred to the radiating fins 13 through the outer rotor 7, and the radiating fins 13 radiate the heat to the deep outside.
As a third embodiment of the present invention, a stratospheric airship including the fin-type outer rotor motor according to the first embodiment or the second embodiment is shown.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fin type external rotor motor, comprising: the inner stator assembly, the outer rotor assembly, the inner stator fixing device and the outer rotor supporting device;
the outer rotor assembly comprises an outer rotor, permanent magnet blocks arranged on the inner surface of the outer rotor, a first cover plate and a second cover plate, the first cover plate and the second cover plate are respectively fixed at two ends of the outer rotor along the axial direction, and the outer rotor, the first cover plate and the second cover plate form a cavity and surround the inner stator assembly; the first cover plate is connected with the outer rotor supporting device; the outer surface of the outer rotor is in a radiating fin shape, or the outer rotor component further comprises a radiating fin which is fixed on the outer surface of the outer rotor;
the inner stator fixing device is connected with the inner stator assembly.
2. The fin type external rotor motor according to claim 1, wherein the inner stator assembly includes an inner stator and an inner stator slot winding provided on the inner stator.
3. The fin type external rotor motor according to claim 1, wherein the inner stator fixing means includes an inner stator shaft fixing support frame, an inner stator shaft passing through a center of the second cover plate and connecting the inner stator shaft fixing support frame and the inner stator assembly, and an inner stator shaft bearing provided on the inner stator shaft and fixed on the second cover plate.
4. The fin type external rotor electric machine according to claim 1, wherein the external rotor supporting means includes an external rotor shaft fixing support frame, an external rotor shaft, and an external rotor shaft bearing, the external rotor shaft is fixed at the center of the first cover plate, connecting the first cover plate and the external rotor shaft fixing support frame, and the external rotor shaft bearing is disposed on the external rotor shaft and fixed on the external rotor shaft fixing support frame.
5. The finned external rotor electric machine according to claim 4, wherein the first cover plate and the external rotor shaft are integrally formed.
6. The finned external rotor electric machine according to claim 1, wherein the first cover plate and the second cover plate are fans with blades, the first cover plate and the second cover plate rotate with the external rotor to form airflow in a fixed direction, and the airflow enters the chamber from the first cover plate and exits the chamber through the second cover plate.
7. The finned external rotor electric machine according to claim 6, wherein the first cover plate includes outer ring fan blades, middle ring reinforcing ribs and inner ring fan blades; the middle ring reinforcing ribs are arranged between the outer ring fan blades and the inner ring fan blades.
8. The fin-type external rotor motor according to claim 6, wherein the second cover plate includes outer ring fan blades, middle ring reinforcing ribs, inner ring fan blades, inner ring reinforcing ribs and shaft holes; the shaft hole is arranged at the center of the second cover plate; the inner ring reinforcing ribs are arranged between the inner ring fan blades and the shaft hole, and the middle ring reinforcing ribs are arranged between the outer ring fan blades and the inner ring fan blades.
9. The fin-type external rotor motor according to claim 1, wherein the permanent magnet blocks are neodymium iron boron permanent magnet blocks or samarium cobalt permanent magnet blocks.
10. A stratospheric airship comprising the fin type outer rotor motor according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922102734.1U CN211046595U (en) | 2019-11-28 | 2019-11-28 | Radiating fin type outer rotor motor and stratospheric airship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922102734.1U CN211046595U (en) | 2019-11-28 | 2019-11-28 | Radiating fin type outer rotor motor and stratospheric airship |
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| Publication Number | Publication Date |
|---|---|
| CN211046595U true CN211046595U (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922102734.1U Active CN211046595U (en) | 2019-11-28 | 2019-11-28 | Radiating fin type outer rotor motor and stratospheric airship |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752689A (en) * | 2019-11-28 | 2020-02-04 | 北京空天高科技有限公司 | Radiating fin type outer rotor motor and stratospheric airship |
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2019
- 2019-11-28 CN CN201922102734.1U patent/CN211046595U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752689A (en) * | 2019-11-28 | 2020-02-04 | 北京空天高科技有限公司 | Radiating fin type outer rotor motor and stratospheric airship |
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Address after: West side, 3 / F, block a, China Communications Building, No.1 yard, South Automobile Museum Road, Fengtai District, Beijing 100070 Patentee after: BEIJING KONGTIANGAO TECHNOLOGY Co.,Ltd. Address before: 100036, 4 West Wanshou Road street, Haidian District, Beijing, 4 Patentee before: BEIJING KONGTIANGAO TECHNOLOGY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |