CN215186126U - Permanent magnet motor rotor structure - Google Patents

Abstract

The utility model discloses a permanent magnet motor rotor structure, which comprises a rotating shaft and a magnetic steel part; the magnetic steel part comprises a plurality of rotor cores sleeved on the rotating shaft, the magnetic steel is inserted into the rotor cores in a skewing manner, and the magnetic steel part is characterized in that: a magnetic isolation plate is clamped between the adjacent rotor cores; the two end faces of the magnetism isolating plate are respectively sealed and covered with the magnetic steel; the periphery of magnetism barrier evenly is provided with a plurality of flabellum. The utility model discloses the setting has the magnetic shield of flabellum to be used for sealing the magnet steel with the magnetic shield closing cap at rotor core's tip, not only can prevent rotor magnetic field's axial magnetic leakage, still can produce the wind current through the flabellum and reduce the rotor temperature, reduce the demagnetization of magnet steel, it is good to have the radiating effect, simple structure, characteristics such as convenient operation.

Description

Permanent magnet motor rotor structure

Technical Field

The utility model relates to a rotor structure, especially a permanent-magnet machine rotor structure that leak protection magnetism, heat dissipation are fast.

Background

The motor is used as a basic power source of industrial production and is generally used in industrial production. The permanent magnet motor in the motor has the advantages of low loss, high efficiency and the like, more accords with the theme of energy conservation and environmental protection, and is applied more and more widely.

The permanent magnet motor is a motor which generates a magnetic field by a permanent magnet arranged on a rotor, and the permanent magnet motor rotor mainly comprises a rotor iron core and a permanent magnet; the rotors have different magnetic circuit structures, so that the running performance, the control strategy, the manufacturing process and the use occasion of the motor are different. Unlike other types of motors, the main magnetic field of a permanent magnet synchronous motor is generated by permanent magnets fixed to a rotor and distributed according to a certain rule. In order to improve the performance of the electrical machine, rotor poles are often used to reduce the effect of the harmonics of the electrical machine (including tooth harmonics) on the back emf and torque performance, but rotor poles cause axial leakage of the rotor field of the electrical machine. The leakage flux can greatly weaken the magnetic field of the main pole and reduce the torque output of the motor. In addition, compared with the traditional motor, the permanent magnet motor has a compact internal structure, so that an air gap in the permanent magnet motor is small, a good circulating air path cannot be formed, and the internal heat exchange efficiency of the permanent magnet motor is low; and the excessive temperature can accelerate the demagnetization of the permanent magnet, thereby influencing the use of the permanent magnet motor. Therefore, how to effectively solve the problems of the leakage flux of the rotor and the internal heat dissipation of the permanent magnet motor is a problem that needs to be solved urgently by those skilled in the art at present.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a can prevent axial magnetic leakage and radiating permanent-magnet machine rotor structure fast.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a permanent magnet motor rotor structure comprises a rotating shaft and a magnetic steel part; the magnetic steel part comprises a plurality of rotor cores sleeved on the rotating shaft, the magnetic steel is inserted into the rotor cores in a skewing manner, and the magnetic steel part is characterized in that: a magnetic isolation plate is clamped between the adjacent rotor cores; the two end faces of the magnetism isolating plate are respectively sealed and covered with the magnetic steel; the periphery of magnetism barrier evenly is provided with a plurality of flabellum.

In the rotor structure of the permanent magnet motor, the two adjacent magnetic steels form a V-shaped structure; each fan blade is opposite to the region between two magnetic steels of the V-shaped structure in the axial direction of the rotating shaft.

In the rotor structure of the permanent magnet motor, a plurality of first ventilation openings are distributed on the rotor core; the magnetic isolation plate is provided with a plurality of air vents penetrating through the front end face and the rear end face; the ventilation holes are opposite to the first ventilation openings one by one in the front-back direction in the axial direction of the rotating shaft.

In the above rotor structure of the permanent magnet motor, the thickness of the magnetic separation plate is: 4-6 mm.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the utility model discloses a set up the one end of magnetic shield closing cap rotor core in adjacent magnet steel part and seal and cover the magnet steel, effectively prevented the axial magnetic leakage in rotor magnetic field, guaranteed the torque output of motor. The magnetic isolation plate of the utility model is uniformly distributed with a plurality of fan blades at the periphery, thus the fan blades are driven to generate wind flow when the magnetic isolation plate and the permanent magnet rotate together; the generated wind flow accelerates the flow of gas on the surface of the rotor, can quickly take away the heat generated by the rotation of the rotor, and avoids the demagnetization of the magnetic steel due to overhigh temperature. The utility model discloses not only can prevent the axial magnetic leakage in rotor magnetic field, go back to reduce rotor temperature through producing the wind current, reduce the demagnetization of magnet steel, have characteristics such as the radiating effect is good, simple structure, convenient operation.

Additionally, the utility model discloses still set up the ventilation hole on the magnetic shield, link up the rotor relatively with the first vent on the rotor core, further improved the ventilation cooling effect of rotor. The utility model discloses set up the thickness of magnetism isolating plate into 4 ~ 6mm, guaranteed the magnetism isolating effect of magnetism isolating plate effectively. The utility model discloses good ventilation effect and magnetism effect of separating have to simple structure, convenient operation.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the magnetic shield of the present invention;

fig. 3 is a schematic structural diagram of the magnetic steel part of the present invention.

The figures are numbered: the air-cooling fan comprises a rotor, a rotor core, a magnetic steel part, a rotor core, a fan blade, a ventilation hole, a rotor core, a first ventilation hole and a rotor, wherein the rotor core comprises 1-a rotating shaft, 2-a nut, 3-an end plate, 4-a magnetic steel part, 5-a magnetic isolation plate, 5-1-a fan blade, 5-2-a ventilation hole, 6-a rotor core, 6-1-a first ventilation hole and 7-magnetic steel.

Detailed Description

Referring to fig. 1, 2 and 3, the rotor structure of the permanent magnet motor comprises a rotating shaft 1, a nut 2, an end plate 3, a magnetic steel part 4 and a magnetic isolation plate 5. The magnetic steel part 4 is provided with a plurality of magnetic steel parts, and each magnetic steel part 4 comprises a rotor core 6 and magnetic steel 7. And each rotor iron core 6 is sleeved on the rotating shaft 1 and fixedly connected with the rotating shaft 1. Each rotor core 6 is provided with a plurality of first ventilation openings 6-1 and a plurality of magnetic steel grooves. The first ventilation openings 6-1 are uniformly distributed on the rotor core 6 in the circumference and penetrate through two end faces of the rotor core 6. The plurality of magnetic steel slots are close to the periphery of the rotor core 6 and are evenly distributed on the end faces of the two sides of the rotor core 6 in a circumferential mode. Every two adjacent magnet steel grooves form a V-shaped structure, and the opening of each V-shaped structure is back to the corresponding shaft 1. The circumferences of the magnetic steel slot groups of the V-shaped structures are uniformly distributed on the rotor iron core 6. And magnetic steel 7 is inserted in each magnetic steel groove. And a magnetic isolation plate 5 is clamped between two adjacent rotor cores 6. The magnetic isolation plate 5 is a circular plate with the thickness of 4-6 mm, covers the end part of the adjacent rotor iron core 6, covers the magnetic steel 7, is provided with a shaft hole in the middle and is connected to the rotating shaft 1 through the shaft hole sleeve. Like this, when the rotor is rotatory, the axial magnetic leakage that the permanent magnet in the rotor produced is blocked by magnetic shield 5 that 4 ~ 6mm is thick, and 4 ~ 6mm magnetic shield 5 also can guarantee that the whole weight of rotor is not influenced the time of the start-up and the stall of rotor by overweight increase when effectively having reduced the torque output influence of rotor axial magnetic leakage to the motor.

Referring to fig. 1, 2 and 3, each magnetic isolation plate 5 of the rotor structure of the permanent magnet motor includes a plurality of fan blades 5-1 and a plurality of ventilation holes 5-2. Each fan blade 5-1 is an arc-shaped plate formed by cutting two end faces of the magnetic isolation plate 5. The fan blades 5-1 are the same as the magnetic steel slot groups of the V-shaped structure in number. The region formed by each cutting magnetism isolating plate 5 is opposite to the region between two adjacent magnetic steel groove groups with V-shaped structures in the front and back direction of the axial direction of the shaft 1. Therefore, the part of the magnetic isolation plate 5 which is not cut can effectively cover the end part of the magnetic steel; the fan blades 5-1 can rotate along with the rotating shaft 1 to generate wind flow, so that the flow speed of the wind flow on the surface of the magnetic steel part 4 is accelerated, the heat dissipation of the magnetic steel 7 is accelerated, and the effect of slowing down the demagnetization of the magnetic steel 7 is achieved. The number of the vent holes 5-2 is the same as that of the first vent holes 6-1, and the vent holes are arranged one by one in front of and behind the first vent holes 6-1 in the axial direction of the shaft 1. Two nuts 2 are connected to the rotating shaft 1 in a threaded mode, and the two nuts 2 are located at two ends of the rotor respectively. The number of the end plates 3 is two, and the two end plates 3 are respectively sleeved between one nut 2 on the shaft 1 and the rotor and are respectively pressed at two ends of the rotor through the two nuts 2. And each end plate 3 is provided with a plurality of second ventilation openings. The number of the second ventilation openings is the same as that of the first ventilation openings 6-1, and the second ventilation openings are opposite to the first ventilation openings 6-1 one by one in the front and back direction of the shaft 1. Therefore, after the shaft 1, the nut 2, the end plate 3, the magnetic steel part 4 and the magnetic isolation plate 5 form a rotor structure, the first ventilation opening 6-1, the ventilation opening 5-2 and the second ventilation opening are communicated with the whole rotor together, so that the heat dissipation inside the rotor is accelerated, the heat dissipation of the magnetic steel 7 is further accelerated, and the demagnetization of the magnetic steel 7 is slowed down.

Claims (4)

1. A permanent magnet motor rotor structure comprises a rotating shaft (1) and a magnetic steel part (4); magnet steel part (4) include rotor core (6) of a plurality of cover connection on pivot (1), magnet steel (7) cuttage is in rotor core (6), its characterized in that: a magnetic isolation plate (5) is clamped between the adjacent rotor iron cores (6); the two end faces of the magnetism isolating plate (5) are respectively sealed and covered with the magnetic steel (7); the periphery of the magnetism isolating plate (5) is uniformly provided with a plurality of fan blades (5-1).

2. A rotor structure for a permanent magnet motor according to claim 1, wherein: the two adjacent magnetic steels (7) form a V-shaped structure; each fan blade (5-1) is opposite to the region between the two magnetic steels (7) of the V-shaped structure in the axial direction of the rotating shaft (1) in the front-back direction.

3. A rotor structure for a permanent magnet motor according to claim 1, wherein: a plurality of first ventilation openings (6-1) are distributed on the rotor iron core (6); the magnetic isolation plate (5) is provided with a plurality of vent holes (5-2) penetrating through the front end surface and the rear end surface; the ventilation holes (5-2) are opposite to the first ventilation holes (6-1) one by one in the front-back direction of the axial direction of the rotating shaft (1).

4. A rotor structure of a permanent magnet motor according to any one of claims 1-3, characterized in that: the thickness of the magnetism isolating plate (5) is as follows: 4-6 mm.

Images