Rotor structure of permanent magnet reluctance motor

Abstract

The utility model relates to a rotor structure of a permanent magnet reluctance motor, which structurally comprises a shaft, a rotor iron core and magnetic steel, the magnetic steel is surface-mounted, and the rotor iron core is welded. The surface-mounted permanent magnet synchronous motor has the advantages that the structural design is reasonable, the surface-mounted permanent magnet synchronous rotor and the welded rotor iron core are adopted, the surface-mounted permanent magnet synchronous rotor is simple in structure, easy to manufacture, small in magnetic leakage, low in rotational inertia and rapid in dynamic response, and the welded rotor iron core can reduce the size and the weight of the motor and improve the power output capability of the motor. The heat management and heat dissipation performance of the motor are effectively improved, and the working efficiency and reliability of the motor can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a motor rotor structure, concretely relates to a rotor structure of low torque ripple permanent magnet reluctance motor. BACKGROUND

[0002] In the prior art, the permanent magnet synchronous motor rotor has the problems of simple design, insufficient buffering capacity and the like, which results in serious wear after long-term use. Once part of the structure is worn, the entire component needs to be replaced, which leads to high maintenance cost and complex disassembly and installation process, thereby affecting the normal operation efficiency of the motor. On the other hand, the permanent magnet synchronous motor generates a large amount of heat when operating under high load, and an effective heat dissipation system needs to be considered in the design to keep the temperature of the motor, especially the permanent magnet, within a safe range and ensure the normal operation of the motor. SUMMARY

[0003] The utility model provides a permanent magnet reluctance motor rotor structure, which aims to overcome the above-mentioned deficiencies in the prior art, simplify disassembly and improve heat dissipation.

[0004] The technical solution of the utility model is a permanent magnet reluctance motor rotor structure, which comprises a shaft, a rotor core and a magnetic steel. The magnetic steel is surface-mounted, and the rotor core is welded. The surface-mounted permanent magnet synchronous rotor can simplify the structure, is easy to manufacture, reduces magnetic leakage and rotational inertia, improves dynamic response, the welded rotor core can reduce the volume and weight of the motor, and improve the power output capacity of the motor.

[0005] Preferably, the rotor core comprises a core seamless steel tube, a round steel plate, a reinforcing rib steel plate and a shaft hole seamless steel tube. The shaft hole seamless steel tube is coaxially arranged at the center of the core seamless steel tube. The round steel plate is welded and connected between the shaft hole seamless steel tube and the core seamless steel tube. The reinforcing rib steel plate is also welded and connected between the shaft hole seamless steel tube and the core seamless steel tube.

[0006] Preferably, the round steel plate is circumferentially provided with six round holes. This can improve the heat dissipation and demagnetization resistance of the motor.

[0007] Preferably, the rotor core is assembled on the shaft through keying, and the connection between the rotor core and the shaft is locked by a shaft retainer. The magnetic steel is adhered around the outer circle of the rotor core by glue. A magnetic steel sleeve is sleeved on the outer circle of the magnetic steel. Magnetic steel pressure plates are fixed on both ends of the magnetic steel through bolt assemblies. The round steel plate of the rotor core is also circumferentially provided with rotor dynamic balance threaded holes. The magnetic steel sleeve can prevent the magnetic steel from loosening and can arrange the magnetic steel in different directions, thereby reducing the axial component of electromagnetic force, reducing the vibration and noise of the motor and ensuring the long-term stable operation of the motor.

[0008] The utility model discloses a structure design is reasonable, adopts the surface -mount permanent magnet synchronous rotor and welding rotor core, and the surface -mount permanent magnet synchronous rotor structure is simple, easy to manufacture, and the magnetic leakage is small, and the rotational inertia is low, and the dynamic response is fast, and the welding rotor core can reduce the volume and weight of motor, improve the power output ability of motor. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the structure schematic diagram of the utility model permanent magnet reluctance motor rotor structure.

[0010] Figure 2 It is Figure 1 The side sectional view of.

[0011] 1 is the shaft, 2 is the rotor core, 21 is the core seamless steel tube, 22 is the round steel plate, 23 is the reinforcing rib steel plate, 24 is the shaft hole seamless steel tube, 25 is the round hole, 3 is the magnetic steel pressing plate, 4 is the rotor core key, 5 is the shaft stop ring, 6 is the bolt assembly, 7 is the magnetic steel, 8 is the magnetic steel cover, 9 is the rotor dynamic balance threaded hole. DETAILED DESCRIPTION

[0012] The utility model will be further explained in detail in combination with example and specific implementation.

[0013] As Figure 1 , 2 A kind of permanent magnet reluctance motor rotor structure, magnetic steel 7 is surface -mount, rotor core 2 is welding type, specifically, its structure includes shaft 1, rotor core 2 and magnetic steel 7, wherein rotor core 2 includes core seamless steel tube 21, round steel plate 22, reinforcing rib steel plate 23 and shaft hole seamless steel tube 24, shaft hole seamless steel tube 24 is coaxially arranged at the center of core seamless steel tube 21, round steel plate 22 is welded and connected between shaft hole seamless steel tube 24 and core seamless steel tube 21, reinforcing rib steel plate 23 is also welded and connected between shaft hole seamless steel tube 24 and core seamless steel tube 21, and 6 round holes 25 are uniformly provided in the circumference of round steel plate 22;Rotor core 2 is assembled on shaft 1 by rotor core key 4, and the connecting place of rotor core 2 and shaft 1 is locked by shaft stop ring 5, magnetic steel 7 is pasted on the outer circle of rotor core 2 by surrounding glue, magnetic steel cover 8 is sleeved on the outer circle of magnetic steel 7, magnetic steel pressing plate 3 is fixed on the both ends of magnetic steel 7 by bolt assembly 6, and rotor dynamic balance threaded hole 9 is also circumferentially provided on the round steel plate 22 of rotor core 2.

[0014] The setting of round hole 25 can improve the heat dissipation and magnetic steel demagnetization resistance of motor.

[0015] The magnetic steel sleeve 8 can prevent the magnetic steel 7 from loosening, and can arrange the magnetic steel 7 in different directions, thereby reducing the axial component of electromagnetic force, reducing the vibration and noise of the motor, and ensuring the long-term stable operation of the motor.

[0016] The above structure adopts surface-mounted magnetic steel and welded rotor core, which can ensure that the magnetic steel can generate lossless magnetic flux, and meanwhile avoids damage of the magnetic steel during installation or use. The disassembly and assembly process is simple, the replacement of the magnetic steel is simplified, the overall performance of the motor and the use efficiency of the material can be significantly improved. The overall structure design is simple, the manufacturing cost is low, and the operation is easy. The wedge angle can be realized, the stability after the magnetic steel is installed can be enhanced, the firmness and reliability during long-term use can be ensured, and the production efficiency can be improved.

[0017] The above components are all prior art, and a person skilled in the art can use any model and existing design that can realize the corresponding functions.

[0018] The above only describes preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the creative concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A permanent magnet reluctance motor rotor structure, the structure comprising a shaft (1), a rotor core (2) and magnetic steel (7), characterized in that, The magnetic steel (7) is surface-mounted, and the rotor core (2) is welded; the rotor core (2) comprises a core seamless steel tube (21), a round steel plate (22), a reinforcing rib steel plate (23) and a shaft hole seamless steel tube (24), the shaft hole seamless steel tube (24) is coaxially arranged at the center of the core seamless steel tube (21), the round steel plate (22) is welded and connected between the shaft hole seamless steel tube (24) and the core seamless steel tube (21), and the reinforcing rib steel plate (23) is also welded and connected between the shaft hole seamless steel tube (24) and the core seamless steel tube (21).

2. A permanent magnet reluctance machine rotor structure as claimed in claim 1, wherein, The round steel plate (22) is uniformly provided with six round holes (25) in the circumferential direction.

3. A permanent magnet reluctance machine rotor structure as claimed in claim 1 or 2, characterised in that, The rotor core (2) is assembled on the shaft (1) through a rotor core key (4), the connection part of the rotor core (2) and the shaft (1) is locked through a shaft check ring (5), the magnetic steel (7) is adhered around the outer circle of the rotor core (2) through glue, a magnetic steel sleeve (8) is sleeved on the outer circle of the magnetic steel (7), the magnetic steel (7) is fixed with a magnetic steel pressing plate (3) through a bolt assembly (6) at both ends, and the round steel plate (22) of the rotor core (2) is also provided with a rotor dynamic balance threaded hole (9) in the circumferential direction.

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