CN215733895U

CN215733895U - Permanent magnet motor

Info

Publication number: CN215733895U
Application number: CN202122039173.2U
Authority: CN
Inventors: 杨伟春; 朱水兴; 汪书华; 王文杰; 张建国; 冯骏
Original assignee: Hangzhou Linjiang Environmental Protection Thermoelectricity Co ltd
Current assignee: Hangzhou Linjiang Environmental Protection Thermoelectricity Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-02-01
Anticipated expiration: 2031-08-26

Abstract

The application discloses a permanent magnet motor, which relates to the technical field of motors and comprises a machine body, a stator piece, a rotor piece, a rotating shaft and an impeller, wherein the stator piece is fixedly arranged in an inner cavity of the machine body; when the motor is used, air blown out from the air outlet end of the impeller enters the inner shaft groove from the air inlet groove and is blown out from the air outlet groove after passing through the inner shaft groove, so that the rotating shaft is cooled, the phenomenon that the rotating shaft is overheated is reduced, and the service life of the motor is prolonged.

Description

Permanent magnet motor

Technical Field

The application relates to the technical field of motors, in particular to a permanent magnet motor.

Background

The motor is a driving device of various equipment such as a fan, a pump, a compressor, a machine tool, a transmission belt and the like, is widely applied to multiple industries and fields such as metallurgy, petrifaction, chemical industry, coal, building materials, public facilities and the like, and is power consumption equipment with the largest power consumption.

At present, when a motor is used, reactive current needs to be absorbed from a power grid to generate an excitation magnetic field, so that the phenomena of slip, low power factor, large stator current and high temperature of a rotating shaft of the motor are caused during operation.

In view of the above-mentioned related art, the inventors found that when the temperature of the rotating shaft is out of date, the temperature of the rotating shaft may transmit the rotor and the stator, thereby causing overheating of the windings, resulting in increased iron and copper losses in the rotor and the stator, thereby reducing the service life of the motor as a whole.

SUMMERY OF THE UTILITY MODEL

In order to improve the life of motor, this application provides a permanent-magnet machine.

The technical scheme adopted by the permanent magnet motor is as follows: the utility model provides a permanent magnet motor, includes fuselage, stator spare, rotor spare, axis of rotation and impeller, the stator spare is fixed to be set up at the fuselage inner chamber, the rotor spare rotates and sets up in the stator spare, axis of rotation fixed connection is on the rotor spare, the impeller rotates and sets up in one side of fuselage and with axis of rotation with axle center fixed connection, the air inlet end of impeller fuselage dorsad, the air-out end of impeller is towards the inner chamber of fuselage, axial groove has been seted up along the axial in the axis of rotation, be close to impeller air-out end in the axis of rotation and set up the air inlet duct, the air inlet duct communicates with interior axial groove each other, the one end that the wind wheel was kept away from to the axis of rotation has seted up out the air duct, it communicates in interior axial groove to go out the air duct.

Through adopting the above technical scheme, in the use, the staff starter motor, when the motor starts, the rotor spare drives the axis of rotation and rotates under the cooperation of stator spare and rotor spare, it is rotatory that the synchronous belt movable vane rotates when the axis of rotation rotates, thereby blow to the inside of fuselage, and then cool down to parts such as the inside stator spare of fuselage and electronic part, meanwhile, the impeller enters into interior axle box from the air inlet duct by the wind that the air-out end blew off, blow off from the air outlet duct behind interior axle box, thereby cool down the axis of rotation, reduce the emergence of overheated phenomenon appears in the axis of rotation, and then improved the life of motor.

Preferably, the air inlet groove is arranged in a horn mouth shape, and the connection point of the air inlet groove and the inner shaft groove is gradually enlarged outwards.

Through adopting above-mentioned technical scheme, when wind gets into the intake stack, can follow the great port entering of intake stack to it is bright to increase the air inlet of intake stack, nevertheless because the diameter of interior axle slot is certain, when the wind that gets into from the intake stack is more, and the wind speed of interior axle slot can accelerate, thereby the heat of taking away in the axis of rotation also can be more, and is better to the cooling effect of axis of rotation.

Preferably, a bearing is rotatably arranged on the machine body, the rotating shaft penetrates through the center of the bearing, a communication groove is radially formed in the circumferential side surface of the rotating shaft, a port on one side of the communication groove is communicated with the inner shaft groove, and a port on the other side of the communication groove faces the inner circumferential side wall of the bearing.

By adopting the technical scheme, when wind flows in the inner shaft groove, the wind can be blown out from the communicating groove after passing through the communicating groove, the blown wind can firstly cool the bearing, and an air film can be formed on the side surface of the inner shaft of the bearing, so that the friction force between the bearing and the rotating shaft is reduced.

Preferably, the rotating shaft is clamped with a positioning ring, and the positioning ring is arranged at one end, far away from the impeller, of the rotating shaft.

By adopting the technical scheme, the rotating shaft is convenient to position when being connected with a device needing output transmission.

Preferably, a plurality of bolt grooves are formed in the positioning ring along the axial direction of the rotating shaft, and the bolt grooves are arranged at equal intervals along the circumferential direction of the positioning ring.

Through adopting above-mentioned technical scheme, make things convenient for the staff to carry out fixed connection with the device that needs the output to make things convenient for the staff to fix disc class device.

Preferably, the positioning ring is provided with a guide groove, a port on one side of the guide groove is communicated with the air outlet groove, and a port on the other side of the guide groove faces away from the machine body.

Through adopting above-mentioned technical scheme, when the air-out groove is out of the wind, can get into the guide way, then blow out from the port of the opposite side of guide way to the holding ring to in the course of the work cools down, and the wind that blows out can also be bloied the device that needs provide the output.

Preferably, the motor is fixedly connected with a fan cover, the fan cover covers the impeller, a plurality of heat dissipation strips are arranged on the outer side face of the machine body and are arranged at equal intervals along the circumferential direction of the machine body, every two adjacent heat dissipation strips form a heat dissipation groove, an opening on one side of the heat dissipation groove faces the air outlet of the impeller, an air deflector is fixedly connected to the inner side wall of the fan cover in the circumferential direction, the end face of one side of the air deflector faces the air outlet of the impeller, a through groove is formed in the air deflector, and the through groove is communicated with the heat dissipation groove.

Through adopting above-mentioned technical scheme, when the impeller rotated, the terminal surface of aviation baffle can be introduced to the wind that is close to the impeller circumference outside, then flows from the logical groove of aviation baffle, flows from the radiating groove, and then cools down to the circumference lateral wall of fuselage, can make more wind flow from the radiating groove through the aviation baffle to improve the cooling effect to the fuselage.

Preferably, the rotor member is a permanent magnet rotor.

By adopting the technical scheme, the rotor piece is set into the permanent magnet rotor, so that the passive current does not need to be absorbed from a power grid, copper loss and iron loss are reduced on the rotor, and the overall working efficiency of the motor is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the inner shaft groove, the air outlet groove and the air inlet groove are formed in the rotating shaft, air blown out from the air outlet end of the impeller enters the inner shaft groove from the air inlet groove, and is blown out from the air outlet groove after passing through the inner shaft groove, so that the rotating shaft is cooled, the phenomenon of overheating of the rotating shaft is reduced, and the service life of the motor is prolonged;

2. through set up the holding ring of seting up the bolt groove on the axis of rotation, make things convenient for the staff with the device fixed connection of disc class on the motor output shaft.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic view of the internal structure of the embodiment of the present application.

Fig. 3 is an exploded view of an embodiment of the present application.

Description of reference numerals: 100. a body; 110. a heat dissipating strip; 120. a fan housing; 121. an air deflector; 122. a through groove; 130. a front machine cover; 140. a machine base; 150. a stator member; 160. a permanent magnetic material; 170. a rotor member; 180. a rear machine cover; 200. a rotating shaft; 201. an inner shaft groove; 202. an air inlet groove; 203. an air outlet groove; 204. a communicating groove; 210. a positioning ring; 211. a guide groove; 212. a bolt slot; 213. an inner ring groove; 220. an impeller; 230. a bearing; 240. and (4) fixing the ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-3. The present application discloses a permanent magnet motor, and as shown in fig. 1 and 2, the permanent magnet motor includes a body 100, a base 140, a front cover 130, a rear cover 180, and a wind shield 120, wherein the body 100 is a cylindrical tube axially penetrating, and the front cover 130 and the rear cover 180 respectively cover ports of two side ports of the body 100. The housing 140 is fixedly coupled to a circumferential side of the body 100. Is fixedly disposed on one side of the rear cover 180 facing away from the body 100, and the fan housing 120 covers the rear cover 180, and the fan housing 120 and the rear cover 180 constitute a rotation space. The lateral wall of fuselage 100 is along axial direction fixedly connected with a plurality of heat dissipation strips 110, and a plurality of heat dissipation strips 110 are along the circumferencial direction equidistant setting of fuselage 100, and every two adjacent heat dissipation strips 110 constitute the radiating groove, and the radiating groove communicates with the rotation space.

Referring to fig. 2 and 3, the inner cavity of the body 100 is provided with a stator member 150, and a circumferential outer side wall of the stator member 150 is closely attached to an inner side of the body 100. The rotor member 170 is rotatably disposed inside the stator member 150, the permanent magnet material 160 is disposed on the circumferential outer side wall of the rotor member 170 along the axial direction, and the permanent magnet material 160 is uniformly laid along the circumferential direction of the rotor member. The rotating shaft 200 is coaxially and fixedly connected to the inside of the rotor member 170, but when the motor is powered on, the rotating shaft 200 is driven to rotate under the cooperation of the rotor member 170 and the stator member 150.

Referring to fig. 2 and 3, bearings 230 are respectively disposed on the front cover 130 and the rear cover 180, both ends of the rotating shaft 200 respectively pass through the centers of the two bearings 230, one end of the rotating shaft 200 is located in the rotating space, and the other end of the rotating shaft 200 passes through the front cover 130 of the motor and is located outside the motor. The impeller 220 is fixedly connected to an end of the rotating shaft 200 located in the rotating space, and a fixing ring 240 for fixing the impeller 220 is further provided on the rotating shaft 200. An air deflector 121 is arranged on the circumferential inner side surface of the fan housing 120 along the circumferential direction, the air deflector 121 is arranged obliquely, a through groove 122 is formed in the air deflector 121, and the through groove 122 is communicated with the heat dissipation groove. When the rotating shaft 200 rotates, the impeller 220 is driven to rotate, and the rotating impeller 220 generates wind, which is guided by the wind deflector 121 and blown into the heat dissipation groove from the through groove 122, thereby cooling the body 100.

Referring to fig. 2 and 3, a positioning ring 210 is fixedly connected to the other end of the rotating shaft 200 away from the impeller 220, a plurality of bolt grooves 212 are axially formed in an end surface of the positioning ring 210, and the bolt grooves 212 are equidistantly arranged in a circumferential direction of the positioning ring 210. A plurality of guide grooves 211 have been seted up to holding ring 210's the terminal surface that backs to fuselage 100, and a plurality of guide grooves 211 are along the circumferencial direction equidistant setting of holding ring 210, and inner ring groove 213 has been seted up along the circumferencial direction in holding ring 210's inside, and guide groove 211 communicates with inner ring groove 213 each other.

Referring to fig. 2 and 3, an inner axial groove 201 is axially formed in the rotating shaft 200, an air inlet groove 202 is formed in a circumferential side wall of one end of the rotating shaft 200 close to the impeller 220, one end of the air inlet groove 202 is communicated with the rotating space, the other end of the air inlet groove 202 is communicated with the inner axial groove 201, and a bell mouth with a large outside and a small inside is formed in the air inlet groove 202 from the rotating space to one end of the inner axial groove 201. An air outlet groove 203 is formed in one end, close to the positioning ring 210, of the rotating shaft 200, one end of the air outlet groove 203 is communicated with the inner shaft groove 201, and the other end of the air outlet groove 203 is communicated with the inner ring groove 213. Two communicating grooves 204 are formed in the rotating shaft 200, one ends of the two communicating grooves 204 are respectively communicated with the inner shaft groove 201, and the other ends of the two communicating grooves 204 correspond to the inner peripheral side walls of the two bearings 230 one by one.

The embodiment of the application is an implementation principle of a permanent magnet motor: when the cooling device is used, the motor is started, the rotating shaft 200 rotates, one end of the rotating shaft 200 drives the impeller 220 to rotate, when the impeller 220 rotates, wind is generated, and a part of the wind is blown into the heat dissipation groove from the through groove 122 through the guide of the wind deflector 121, so that the cooling of the machine body 100 is realized. A part of the air enters from the air inlet groove 202 and passes through the inner shaft groove 201, a part of the air entering the inner shaft groove 201 exits from the communicating groove 204, an air film is formed on the inner side wall of the bearing 230, a part of the air is discharged from the air outlet groove 203, the discharged air passes through the inner ring groove 213, and finally the air is sprayed out from the groove guide groove 211.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a permanent magnet motor, includes fuselage (100), stator spare (150), rotor spare (170), axis of rotation (200) and impeller (220), stator spare (150) is fixed to be set up in fuselage (100) inner chamber, rotor spare (170) rotate to set up in stator spare (150), axis of rotation (200) fixed connection is on rotor spare (170), impeller (220) rotate set up in one side of fuselage (100) and with axis of rotation (200) with axle center fixed connection, its characterized in that: the air inlet end of impeller (220) is fuselage (100) dorsad, the air-out end of impeller (220) is towards the inner chamber of fuselage (100), interior axial trough (201) have been seted up along the axial in the axis of rotation, it sets up air inlet groove (202) to be close to impeller (220) air-out end on axis of rotation (200), air inlet groove (202) and interior axial trough (201) communicate each other, air outlet groove (203) have been seted up to the one end that the wind wheel was kept away from in axis of rotation (200), air outlet groove (203) and interior axial trough (201) communicate.

2. A permanent magnet motor according to claim 1, characterized in that: the air inlet groove (202) is arranged in a horn mouth mode, and the connection point of the air inlet groove (202) and the inner shaft groove (201) is gradually enlarged outwards.

3. A permanent magnet motor according to claim 1, characterized in that: the rotating shaft is characterized in that a bearing (230) is rotatably arranged on the machine body (100), the rotating shaft (200) penetrates through the center of the bearing (230), a communication groove (204) is formed in the circumferential side surface of the rotating shaft (200) along the radial direction, a port on one side of the communication groove (204) is communicated with the inner shaft groove (201), and a port on the other side of the communication groove (204) faces the inner circumferential side wall of the bearing (230).

4. A permanent magnet motor according to claim 1, characterized in that: the rotating shaft (200) is clamped with a positioning ring (210), and the positioning ring (210) is arranged at one end, far away from the impeller (220), of the rotating shaft (200).

5. A permanent magnet motor according to claim 4, characterized in that: a plurality of bolt grooves (212) are formed in the positioning ring (210) along the axial direction of the rotating shaft (200), and the bolt grooves (212) are arranged at equal intervals along the circumferential direction of the positioning ring (210).

6. A permanent magnet electric motor according to claim 5, characterized in that: the positioning ring (210) is provided with a guide groove (211), a port on one side of the guide groove (211) is communicated with the air outlet groove (203), and a port on the other side of the guide groove (211) faces back to the machine body (100).

7. A permanent magnet motor according to claim 1, characterized in that: the fan comprises a motor fixedly connected with a fan cover (120), wherein the fan cover (120) covers an impeller (220), a plurality of heat dissipation strips (110) are arranged on the outer side surface of a machine body (100) at equal intervals along the circumferential direction of the machine body (100), a heat dissipation groove is formed by every two adjacent heat dissipation strips (110), one side opening of the heat dissipation groove faces to an air outlet of the impeller (220), an air deflector (121) is fixedly connected to the inner circumferential side wall of the fan cover (120), one side end face of the air deflector (121) faces to the air outlet of the impeller (220), a through groove (122) is formed in the air deflector (121), and the through groove (122) is communicated with the heat dissipation groove.

8. A permanent magnet motor according to claim 7, wherein: the rotor member (170) is a permanent magnet rotor.