CN212751934U - Rotor structure of outer rotor permanent magnet synchronous motor - Google Patents
Rotor structure of outer rotor permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN212751934U CN212751934U CN202020965339.6U CN202020965339U CN212751934U CN 212751934 U CN212751934 U CN 212751934U CN 202020965339 U CN202020965339 U CN 202020965339U CN 212751934 U CN212751934 U CN 212751934U
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- rotor
- bearing
- permanent magnet
- synchronous motor
- magnet synchronous
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model discloses an external rotor PMSM rotor structure, which comprises a rotating shaft, install the cup type in the pivot and support a section of thick bamboo and fix the rotor core who supports a section of thick bamboo inner wall at the cup type, cover the rotor end plate on the rotor core, set up the round hole that a plurality of axial run through rotor core and circumference equipartition on the rotor core, wear to establish the pull rod in the round hole, the nut fastening is used at the both ends of pull rod, the bearing is equipped with in the pivot, bearing one end sets up the bearing enclosing cover, lie in bearing enclosing cover inboard installation disc in the pivot, set up a plurality of rotor slotted holes on the rotor core terminal surface, installation magnet steel in the rotor slotted hole, a plurality of axial ventilation holes are seted up. The rotor structure of the outer rotor permanent magnet synchronous motor has the advantages of simple structure, high reliability and improvement on the internal heat exchange effect of the motor.
Description
Technical Field
The utility model belongs to the technical field of the PMSM technique and specifically relates to an outer rotor PMSM rotor structure.
Background
The permanent magnet motor has the advantages of simple mechanism, reliable operation, less loss, high efficiency, direct drive control and the like, is particularly suitable for application occasions with low speed and large torque, and is widely applied to industries such as petroleum, mining, metallurgy and steel rolling. The temperature rise of the motor cannot exceed a certain value, and in order to improve the heat dissipation capacity of the motor, a reasonable cooling system is adopted to be very necessary for controlling the temperature rise of the motor.
The heat dissipation of the outer rotor permanent magnet motor is more difficult than that of the traditional inner rotor motor, so that the temperature rise problem of the permanent magnet motor is particularly prominent. If the temperature rise of the motor is too high, the performance of the motor is reduced, the service life of the motor is influenced, and even a safety problem is caused. In the prior art, cooling devices such as fans and the like are often arranged on the front end cover and the rear end cover of the motor or in the motor, and although the two cooling structures have good air cooling effects, the former is only suitable for an outer rotor motor with higher rotating speed, if the rotating speed of the motor is lower, the heat dissipation requirement cannot be met, and the latter has influence on the reliability and the maintenance difficulty of the motor due to the arrangement of the fan in the motor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the rotor structure of the outer rotor permanent magnet synchronous motor overcomes the defects of the prior art, is simple in structure and high in reliability, and improves the internal heat exchange effect of the motor.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an outer rotor PMSM rotor structure, includes the pivot, installs the cup type in the pivot and supports a section of thick bamboo and fix the rotor core at a cup type support section of thick bamboo inner wall, covers the rotor end plate on the rotor core, sets up the round hole that a plurality of axial run through rotor core and circumference equipartition on the rotor core, the round hole in wear to establish the pull rod, the both ends of pull rod are fastened with the nut, the pivot on be equipped with the bearing, bearing one end sets up the bearing enclosing cover, lies in bearing enclosing cover inboard installation disc in the pivot, the rotor core terminal surface on set up a plurality of rotor slotted holes, rotor slotted hole in-hole installation magnet steel, the bobbin base of cup type support a section of thick bamboo set up a plurality.
Furthermore, the pull rod penetrates through the rotor end plate, the rotor iron core and the cup-shaped supporting cylinder in sequence to enable the rotor end plate, the rotor iron core and the cup-shaped supporting cylinder to be fastened together.
Furthermore, a step is arranged at one end of the bearing outer cover connected with the bearing, and the step is matched with the end surface of the cup-shaped supporting cylinder.
Further, a bearing chuck is mounted on the rotating shaft, and the bearing chuck is in pressing contact with the outer end face of the oil thrower.
Furthermore, the circular holes are 30 uniformly distributed on the circumference.
Furthermore, the rotor slotted hole is in an inverted V shape, and 26 rotor slotted holes are uniformly distributed on the circumference.
Furthermore, the number of the axial vent holes is 6 which are circumferentially and uniformly distributed.
The utility model discloses an outer rotor PMSM rotor structure, its beneficial effect is: the rotor core is fixed with the rotor end plate and the cup-shaped supporting cylinder through the pull rod, so that the rotor is more flexibly laminated and has higher reliability; the supporting cylinder structure of cup type has improved motor space utilization, sets up the ventilation hole simultaneously on the cup type supporting cylinder, improves the inside heat transfer effect of motor.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of FIG. 1 in the direction of P;
in the figure, 1, a rotating shaft, 2, a cup-shaped supporting cylinder, 3, a pull rod, 4, a rotor end plate, 5, a rotor iron core, 6, a bearing, 7, a bearing outer cover, 8, an oil thrower, 9, a bearing chuck, 10, a rotor slotted hole, 11, magnetic steel, 12, an axial vent hole and 13, a round hole are arranged.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
The rotor structure of the outer rotor permanent magnet synchronous motor shown in fig. 1-2 comprises a rotating shaft 1, a cup-shaped supporting cylinder 2 installed on the rotating shaft 1 and a rotor core 5 fixed on the inner wall of the cup-shaped supporting cylinder 2, a rotor end plate 4 is covered on the rotor core 5, 30 circular holes 13 which axially penetrate through the rotor core 5 and are uniformly distributed on the circumference are formed in the rotor core 5, pull rods 3 penetrate through the circular holes 13, two ends of each pull rod 3 are fastened by nuts, a bearing 6 is installed on the rotating shaft 1, a bearing outer cover 7 is arranged at one end of each bearing 6, an oil thrower disc 8 is installed on the rotating shaft 1 and located on the inner side of the bearing outer cover 7, 26 rotor slot holes 10 are formed in the end face of the rotor core 5, the rotor slot holes 10 are inverted-V-shaped, magnetic steel 11 is installed in each rotor slot hole 10.
The pull rod 3 sequentially penetrates through the rotor end plate 4, the rotor iron core 5 and the cup-shaped supporting cylinder 2, so that the three are fastened together.
The end of the bearing outer cover 7 connected with the bearing 6 is provided with a step which is matched with the end surface of the cup-shaped supporting cylinder 2.
The rotating shaft 1 is provided with a bearing chuck 9, and the bearing chuck 9 is in pressing contact with the outer end face of the oil thrower 8.
The rotor structure of the outer rotor permanent magnet synchronous motor of the utility model has the advantages that the rotor core is fixed with the rotor end plate and the cup-shaped supporting cylinder through the pull rod, the rotor is more flexibly laminated, and the reliability is higher; the supporting cylinder structure of cup type has improved motor space utilization, sets up the ventilation hole simultaneously on the cup type supporting cylinder, improves the inside heat transfer effect of motor.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides an outer rotor PMSM rotor structure which characterized by: comprises a rotating shaft (1), a cup-shaped supporting cylinder (2) arranged on the rotating shaft (1) and a rotor core (5) fixed on the inner wall of the cup-shaped supporting cylinder (2), wherein the rotor core (5) is covered with a rotor end plate (4), the rotor core (5) is provided with a plurality of circular holes (13) which axially penetrate through the rotor core (5) and are uniformly distributed on the circumference, the round hole (13) is internally provided with a pull rod (3) in a penetrating way, two ends of the pull rod (3) are fastened by nuts, a bearing (6) is arranged on the rotating shaft (1), a bearing outer cover (7) is arranged at one end of the bearing (6), an oil thrower (8) is arranged on the rotating shaft (1) and positioned at the inner side of the bearing outer cover (7), a plurality of rotor slotted holes (10) are arranged on the end surface of the rotor core (5), magnetic steel (11) is arranged in the rotor slotted holes (10), the bottom of the cup-shaped supporting cylinder (2) is provided with a plurality of axial ventilation holes (12).
2. The rotor structure of the outer rotor permanent magnet synchronous motor according to claim 1, wherein: the pull rod (3) penetrates through the rotor end plate (4), the rotor iron core (5) and the cup-shaped supporting cylinder (2) in sequence, and the rotor end plate, the rotor iron core and the cup-shaped supporting cylinder are fastened together.
3. The rotor structure of the outer rotor permanent magnet synchronous motor according to claim 1, wherein: one end of the bearing outer cover (7) connected with the bearing (6) is provided with a step, and the step is matched with the end surface of the cup-shaped supporting cylinder (2).
4. The rotor structure of the outer rotor permanent magnet synchronous motor according to claim 1, wherein: the bearing oil thrower is characterized in that a bearing chuck (9) is installed on the rotating shaft (1), and the bearing chuck (9) is in pressing contact with the outer end face of the oil thrower disc (8).
5. The rotor structure of the outer rotor permanent magnet synchronous motor according to claim 1, wherein: the number of the round holes (13) is 30 which are evenly distributed on the circumference.
6. The rotor structure of the outer rotor permanent magnet synchronous motor according to claim 1, wherein: the rotor slotted hole (10) is in an inverted V shape, and 26 rotor slotted holes are uniformly distributed on the circumference.
7. The rotor structure of the outer rotor permanent magnet synchronous motor according to claim 1, wherein: the number of the axial ventilation holes (12) is 6 which are uniformly distributed on the circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020965339.6U CN212751934U (en) | 2020-05-29 | 2020-05-29 | Rotor structure of outer rotor permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020965339.6U CN212751934U (en) | 2020-05-29 | 2020-05-29 | Rotor structure of outer rotor permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212751934U true CN212751934U (en) | 2021-03-19 |
Family
ID=75006451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020965339.6U Active CN212751934U (en) | 2020-05-29 | 2020-05-29 | Rotor structure of outer rotor permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212751934U (en) |
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2020
- 2020-05-29 CN CN202020965339.6U patent/CN212751934U/en active Active
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