Rotor structure of permanent magnet motor

Abstract

The utility model relates to the technical field of permanent magnet motors, in particular to a permanent magnet motor rotor structure, which comprises a rotor shaft unit, an end plate is fixedly connected outside the rotor shaft unit, a rotor iron core body is arranged outside the end plate, a magnetic steel clamping groove is integrally formed in the top end surface of the rotor iron core body, and the magnetic steel clamping groove is fixedly connected with the rotor shaft unit. According to the utility model, through the arrangement of the rotor iron core body, the baffle plate, the first pressing plate, the second pressing plate and the magnetic steel clamping groove, the permanent magnet motor rotor structure can be convenient to use the second pressing plate to abut against and block the lower opening of the magnetic steel clamping groove in the process of carrying out magnetic steel assembling operation; and a baffle plate is arranged on the first pressing plate, so that the baffle plate can abut against and block the upper opening of the magnetic steel clamping groove to cooperate with the magnetic steel to realize stable assembly, the assembly efficiency of the rotor can be effectively improved, and the problems of falling apart of the rotor punching sheet and rebounding of the magnetic steel in the assembly process are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet motors, in particular to a permanent magnet motor rotor structure. Background Art

[0002] Since the ball mill is a typical low-speed, high-torque load, the use of a permanent magnet motor can greatly improve the efficiency of the ball mill and reduce the cost of use during its operation. In addition, since the permanent magnet motor can achieve high efficiency and energy-saving effects, this setting can greatly reduce the power consumption of the ball mill and achieve a significant power-saving effect.

[0003] In the process of existing ball mills being driven by permanent magnet motors to achieve operation, since the permanent magnet motors used in the ball mills need to have strong magnetism, magnets with strong magnetism are installed in the rotors. However, in the process of installing the magnets, due to the repulsion of like poles, the rotor punchings are very likely to fall apart, and when the magnets are installed, the magnets are very likely to rebound, which greatly reduces the assembly efficiency of the rotor. Therefore, a permanent magnet motor rotor structure is proposed to address the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a permanent magnet motor rotor structure to solve the problem in the above background technology that when the existing ball mill is driven by the permanent magnet motor to operate, the rotor punching sheets are prone to fall apart and the magnetic steel is prone to rebound.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A permanent magnet motor rotor structure includes a rotor shaft unit, an end plate is fixedly connected to the outside of the rotor shaft unit, and a rotor core body is arranged on the outside of the end plate, a top surface of the rotor core body is provided with a magnetic steel slot through integral molding, and a first pressure plate is arranged above the rotor core body, a baffle is fixedly connected to the edge of the first pressure plate by bolts, a second pressure plate is welded to the bottom of the rotor core body, and a rubber pad is fixedly connected to the bottom of the baffle.

[0007] Preferably, the end plate is in a rectangular structure, and hoisting holes are respectively provided above and below the surface of the end plate.

[0008] Preferably, a first keyway is integrally formed at an upper position of a side of the end plate away from the rotor shaft unit, and a protrusion is integrally formed at a lower position of a side of the end plate away from the rotor shaft unit, and the protrusion is abutted against the second pressure plate.

[0009] Preferably, a groove is provided on the surface of the rotor core body, and a second keyway is provided on the inner side of the rotor core body, and a key block keyed to the second keyway is provided at one end of the front and rear end plates, and the second keyway is provided in a group.

[0010] Preferably, the magnetic steel slots are arranged at circumferential intervals along the center point of the rotor core body, and the magnetic steel slots and the baffle are arranged relatively to each other in upper and lower positions. The baffle is arranged in a "Z"-shaped structure. A slot is provided at the edge of the first pressure plate for centering with the baffle, and the number of the magnetic steel slots corresponds to the number of rubber pads.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, by providing the rotor core body, baffle, first pressure plate, second pressure plate and magnet slot, the permanent magnet motor rotor structure can facilitate the magnet assembly operation. For multiple magnets that need to be inserted into the rotor core body, the second pressure plate can be used to abut and block the lower opening of the magnet slot, and then the baffle can be installed on the first pressure plate so that it can abut and block the upper opening of the magnet slot to cooperate with the magnet to achieve stable assembly. At the same time, through the above installation process, the assembly efficiency of the rotor can be effectively improved, and the problems of rotor punching falling apart and magnet rebounding during the assembly process can be avoided. In addition, the solid rotor structure can effectively improve the life of the rotor and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the installation structure of the second pressing plate of the utility model;

[0015] Figure 3 This is a schematic diagram of the end plate structure of the utility model;

[0016] Figure 4 It is a schematic diagram of the overall explosion structure of the utility model.

[0017] In the figure: 1. rotor shaft unit; 2. end plate; 3. rotor core body; 4. magnetic steel slot; 5. first pressure plate; 6. baffle; 7. groove; 8. second pressure plate; 9. protrusion; 10. rubber pad; 11. second keyway; 12. lifting hole; 13. first keyway. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 , the utility model provides a technical solution:

[0020] A permanent magnet motor rotor structure includes a rotor shaft unit 1, an end plate 2 is fixedly connected to the outside of the rotor shaft unit 1, and a rotor core body 3 is arranged on the outside of the end plate 2, a magnetic steel slot 4 is opened on the top surface of the rotor core body 3 through integral molding, and a first pressure plate 5 is arranged above the rotor core body 3, a baffle 6 is fixedly connected to the edge of the first pressure plate 5 by bolts, a second pressure plate 8 is welded to the bottom of the rotor core body 3, and a rubber pad 10 is fixedly connected to the bottom of the baffle 6.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, the end plate 2 is arranged in a rectangular structure, and lifting holes 12 are respectively opened above and below the surface of the end plate 2. When the rotor shaft unit 1 is assembled into the rotor core body 3, the multiple sets of lifting holes 12 mainly serve to assist the rotor shaft in quickly connecting with the lifting equipment; the magnetic steel slots 4 are arranged at circumferential intervals along the center point of the rotor core body 3, and the upper and lower positions of the magnetic steel slots 4 and the baffle 6 are relatively arranged, and the baffle 6 is arranged in a "Z"-shaped structure. The edge position of the first pressure plate 5 is provided with a slot that is aligned with the baffle 6. The number of magnetic steel slots 4 corresponds to the number of rubber pads 10. When the "Z"-shaped structure bolts are fixed to the edge position of the first pressure plate 5 and the upper opening of the magnetic steel slots 4 is blocked, the rubber pads 10 will fit with the magnetic steel, which mainly prevents the baffle 6 from wearing the magnetic steel.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a first keyway 13 is formed at an upper position of the side of the end plate 2 away from the rotor shaft unit 1 through integral molding, and a protrusion 9 is formed at a lower position of the side of the end plate 2 away from the rotor shaft unit 1 through integral molding, and the protrusion 9 is abutted against the second pressure plate 8. When the second pressure plate 8 is welded to the lower end of the rotor core body 3, the second pressure plate 8 will abut against the protrusion 9, and at this time, the protrusion 9 will provide an abutment and limiting effect; a groove 7 is formed on the surface of the rotor core body 3, and a second keyway 11 is formed on the inner side of the rotor core body 3. A key block bonded to the second keyway 11 is provided at one end of the front and rear end plates 2, and a group of second keyways 11 are provided. When the rotor core body 3 is fitted and installed in the rotor core body 3, the front and rear end plates 2 will be stably connected to the rotor core body 3 through the bonding of the key block and the second keyway 11, so that the subsequent rotor shaft unit 1 can realize the rotation operation with the rotor core body 3 through the end plate 2.

[0023] Working process: When manufacturing the permanent magnet motor, first install the first pressing plate 5 and the second pressing plate 8 at the upper and lower ends of the rotor core body 3 respectively. The first pressing plate 5 is first pressed on the upper end of the rotor core body 3 to facilitate the adjustment of the components during the subsequent installation process. At the same time, after the first pressing plate 5 is pressed on the rotor core body 3, the upper opening of the magnetic steel slot 4 will be exposed, and the second pressing plate 8 is welded to the lower end of the rotor core body 3 and blocks the lower opening of the magnetic steel slot 4. Then, the rotor shaft unit 1 is placed in the rotor core body 3, and then the magnetic steel is sequentially installed from the upper opening of the magnetic steel slot 4 as required. Put them into the magnetic steel slot 4. Every time two adjacent magnetic steels are inserted, it is necessary to install a baffle 6 on the first pressure plate 5 to block the upper opening of the magnetic steel slot 4 with the baffle 6. The baffle 6 is installed by using bolts to fix the baffle 6, the first pressure plate 5 and the rotor core body 3 together. Repeating this operation will block all the openings on the magnetic steel slot 4. After completing the assembly operation of the permanent magnet motor, the upper and lower pressure plates can be used to improve the structural stability of the magnetic steel after installation, and the rotor punching sheets can be prevented from falling apart during the assembly process, so that the permanent magnet motor can be put into the ball mill for driving use later.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet motor rotor structure, comprising a rotor shaft unit (1), characterized in that: The rotor shaft unit (1) is fixedly connected to an end plate (2) on the outside, and a rotor core body (3) is provided on the outside of the end plate (2); a magnetic steel slot (4) is provided on the top surface of the rotor core body (3) through integral molding, and a first pressure plate (5) is provided above the rotor core body (3); a baffle (6) is fixedly connected to the edge of the first pressure plate (5) by bolts; a second pressure plate (8) is welded to the bottom of the rotor core body (3), and a rubber pad (10) is fixedly connected to the bottom of the baffle (6).

2. A permanent magnet motor rotor structure according to claim 1, characterized in that: The end plate (2) is arranged in a rectangular structure, and lifting holes (12) are respectively provided at the upper and lower positions of the surface of the end plate (2).

3. A permanent magnet motor rotor structure according to claim 1, characterized in that: A first keyway (13) is formed integrally with the upper side of the end plate (2) away from the rotor shaft unit (1), and a protrusion (9) is formed integrally with the lower side of the end plate (2) away from the rotor shaft unit (1), wherein the protrusion (9) is abutted against the second pressure plate (8).

4. A permanent magnet motor rotor structure according to claim 2, characterized in that: A groove (7) is provided on the surface of the rotor core body (3), and a second keyway (11) is provided on the inner side of the rotor core body (3); a key block keyed to the second keyway (11) is provided at one end of the front and rear end plates (2); and a group of the second keyways (11) is provided in total.

5. A permanent magnet motor rotor structure according to claim 1, characterized in that: The magnetic steel slots (4) are arranged at intervals in the circumferential direction along the center point of the rotor core body (3), and the magnetic steel slots (4) and the baffle (6) are arranged in relative positions up and down, the baffle (6) is arranged in a "Z"-shaped structure, and a slot is provided at the edge of the first pressure plate (5) to be centrally engaged with the baffle (6), and the number of the magnetic steel slots (4) corresponds to the number of the rubber pads (10).

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