Block rotor iron core fixing structure of permanent magnet motor

Abstract

The utility model discloses a block rotor core fixing structure of a permanent magnet motor, which comprises a rotor core, a bushing and a shaft, the bushing is sleeved on the shaft, the rotor core and the bushing are fastened and connected through a T-shaped key, a bolt and a nut, the rotor core adopts a block rotor structure, the block rotor structure comprises a rotor quarter iron core, and the rotor quarter iron core is provided with a T-shaped key. The rotor comprises a rotor quarter iron core, magnetic steel, T-shaped keys, a rotor outer end pressing plate and a rotor inner end pressing plate, the rotor quarter iron core is formed by laminating quarter circumferential punching sheets, the magnetic steel is pressed into a magnetic steel groove of the rotor quarter iron core, the T-shaped keys penetrate into magnetic isolation holes of the rotor quarter iron core, and the T-shaped keys penetrate through the magnetic isolation holes of the rotor quarter iron core. And the rotor outer end pressing plate and the rotor inner end pressing plate are fixed at the two ends of the rotor iron core. According to the utility model, requirements of part processing on equipment are effectively reduced, safe and reliable operation of the permanent magnet motor is ensured, production equipment cost is reduced, and product competitiveness is improved.

Description

Technical Field

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

[0002] In recent years, with the continuous development of rare earth permanent magnet technology, permanent magnet synchronous motors have become more and more ideal drive motors for modern industrial sectors. They have the advantages of high overall efficiency, low maintenance, excellent speed regulation performance, and large overload starting capacity. With the gradual popularization of permanent magnet synchronous motors, small-scale factories often face a small number of special large-size permanent magnet synchronous motor orders, but the existing equipment cannot meet the requirements of the core punching size, and the investment in upgrading equipment is too high.

[0003] At the same time, when faced with the situation where the driven end and the driving end share the same shaft, such as a modification project where the driven end provides a rotor shaft or the rotor shaft needs to be installed on-site, the general integral structure of the permanent magnet motor installation cannot meet this special situation. Summary of the invention

[0004] The utility model aims to provide a block rotor core fixing structure of a permanent magnet motor to overcome the above-mentioned difficulties in production and manufacturing.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a block rotor core fixing structure of a permanent magnet motor, including a rotor core, a bushing, and a shaft, the bushing is sleeved on the shaft, the rotor core and the bushing are fastened together by a T-key and bolts and nuts, the rotor core adopts a block rotor structure, the block rotor structure includes a rotor quarter core, magnetic steel, T-key, a rotor outer end pressure plate and a rotor inner end pressure plate, the rotor quarter core is composed of a quarter of a circumferential punching sheet stacked, the magnetic steel is pressed into the magnetic steel slot of the rotor quarter core, the T-key is inserted into the magnetic isolation hole of the rotor quarter core, and the rotor outer end pressure plate and the rotor inner end pressure plate are fixed at both ends of the rotor core.

[0006] Furthermore, the T-key is a key plate with a T-shaped cross section, with oblong countersunk through holes distributed at both ends thereof, and hexagonal bolts are inserted into the through holes.

[0007] Furthermore, the bushing includes two half bushings, the centers of the two half bushings are symmetrical and connected by fasteners.

[0008] Furthermore, the half bushing includes a smooth hole plane, an outer semi-circular barrel, an inner semi-circular barrel and a threaded plane; the surface of the smooth hole plane is evenly distributed with smooth through holes, and the surface of the threaded plane is evenly distributed with threaded through holes, wherein the smooth hole plane and the threaded plane on one half bushing are respectively connected to the threaded plane and the smooth hole plane on the other half bushing, and are fastened together by bolts and nuts.

[0009] Furthermore, the outer circle of the inner semi-circular barrel is connected to the inner end surface of the outer semi-circular barrel through a semi-circular ring bracket and a bracket.

[0010] Furthermore, a keyway for inserting the lower end of the T-key is provided on the outer surface of the outer semi-circular barrel, and a bolt hole communicating with the T-key through hole is provided in the keyway, and the lower end of the hexagonal bolt passes through the bolt hole and is fixed by a nut.

[0011] Furthermore, the rotor outer end pressure plate is composed of one twentieth of a circular ring, the rotor outer end pressure plate is located on both sides of the magnetic steel and is locked by a fastening screw; the rotor inner end pressure plate is composed of one twelfth of a circular ring, the rotor inner end pressure plate is located on both sides of the T-key and is locked by a fastening screw.

[0012] Furthermore, the magnetic steel is a regular rectangular parallelepiped.

[0013] Furthermore, the shaft is a cylinder with no stop on the surface, and the half-bushing fastener can be loosened to freely adjust the position of the bushing on the shaft.

[0014] The beneficial effect of the utility model is: by adopting the technical solution of the utility model, on the one hand, when the factory faces a small number of special large-size permanent magnet synchronous motor order markets, but the existing equipment cannot meet the size requirements of large-size iron core punching sheets, the large-size full-circle punching sheets are changed to quarter-circle punching sheets, and the T-key is connected through the magnetic isolation hole to further reduce the size of the punching sheets, so that the existing equipment can meet the production requirements without upgrading the equipment, thereby reducing production costs and increasing product competitiveness in the market.

[0015] On the other hand, when faced with the situation where the driven end and the driving end share the same shaft, or when on-site shaft threading is required, the technical solution of the utility model can fully adapt to this situation and can adjust the position of the entire machine according to actual conditions, greatly increasing the flexibility of on-site installation.

[0016] The utility model determines the appropriate structure and connection and fixing method by modeling and designing the motor structure, analyzing, calculating and simulating the force of each structure, effectively reducing the requirements for equipment in parts processing, ensuring the safe and reliable operation of the permanent magnet motor, reducing the cost of production equipment, and improving product competitiveness.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the appearance of the fixed structure of the segmented rotor core of the practical permanent magnet motor;

[0019] Figure 2 This is a schematic diagram of a half-section of the rotor core of the utility model;

[0020] Figure 3 It is a partial schematic diagram of the rotor core of the utility model;

[0021] Figure 4 It is a schematic diagram of the T-shaped key of the utility model from three perspectives: main, side and top.

[0022] Figure 5 It is a half-section schematic diagram of the bushing of the utility model.

[0023] The markings in the figure are: 1. Rotor quarter core; 2. Magnetic steel; 3. T-key; 4. Rotor outer end pressure plate; 5. Rotor inner end pressure plate; 6. Light hole plane; 7. Outer semi-circular barrel; 8. Bracket; 9. Inner semi-circular barrel; 10. Semi-circular ring bracket; 11. Threaded plane; 12. Rotor core; 13. Bushing; 14. Shaft; 15. Hexagonal bolt. DETAILED DESCRIPTION

[0024] 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.

[0025] like Figure 1 and 2 As shown, a block rotor core fixing structure of a permanent magnet motor includes a rotor core 12, a bushing 13, and a shaft 14. The bushing 13 is sleeved on the shaft 14. The rotor core 12 and the bushing 13 are fastened together by a T-key 3 and bolts and nuts. The rotor core 12 adopts a block rotor structure. The block rotor structure includes a rotor quarter core 1, a magnetic steel 2, a T-key 3, a rotor outer end pressure plate 4 and a rotor inner end pressure plate 5. The rotor quarter core 1 is composed of a quarter of a circumferential stamping stacked together. The magnetic steel 2 is pressed into the magnetic steel slot of the rotor quarter core. The T-key 3 is inserted into the magnetic isolation hole of the rotor quarter core. The rotor outer end pressure plate 4 and the rotor inner end pressure plate 5 are fixed at both ends of the rotor core.

[0026] like Figure 3As shown, the rotor core is divided into four parts, and each part of the rotor quarter core 1 is composed of a quarter of a circumferential stamping sheet stacked together. After stacking, the T-key 3 is passed through the magnetic isolation hole of the rotor core to press the core. Under the pressure-maintaining state, the core at both ends of the T-key 3 is locked by the rotor inner end pressure plate 5 through the fastening screws, and then the magnetic steel 2 is pressed into the magnetic steel slot of the rotor core, and the core at both ends of the magnetic steel is locked by the rotor outer end pressure plate 4 through the fastening screws.

[0027] like Figure 4 As shown, the T-key 3 is a key plate with a T-shaped cross section, with oblong countersunk through holes distributed at both ends thereof, and hexagonal bolts 15 are inserted into the through holes.

[0028] like Figure 5 As shown, the structure of the bushing 13 includes a half bushing, a fastener, etc. There are two half bushings, which are symmetrical and connected by fasteners. The half bushing includes an inner half barrel 9, an outer half barrel 7, a half ring bracket 10, a bracket 8, a light hole plane 6 and a threaded plane 11. The outer circle of the inner half barrel 9 is connected to the inner end face of the outer half barrel 7 through the half ring bracket 10 and the bracket 8. The surface of the light hole plane 6 is evenly distributed with smooth through holes, and the surface of the threaded plane 11 is evenly distributed with threaded through holes. When the two half bushings are spliced ​​and connected, the light hole plane 6 and the threaded plane 11 on one half bushing are respectively connected with the threaded plane 11 and the light hole plane 6 on the other half bushing, and are fastened together by bolts and nuts. In addition, a keyway for inserting the lower end of the T-key 3 is provided on the outer surface of the outer half barrel 7, and a bolt hole communicating with the T-key through hole is also provided in the keyway. The lower end of the hexagonal bolt 15 passes through the bolt hole and is fixed by a nut. According to the actual installation situation, the half bushing fasteners can be loosened to adjust the position of the free-adjustable bushing on the shaft.

[0029] Through the implementation of actual projects, the stamping equipment and mold size required by the utility model are smaller, and after assembly, the experimental and order requirements are met, ensuring the safe and reliable operation of the permanent magnet motor, reducing the production input cost, and no need to invest in larger equipment. In the on-site installation, by using the new block rotor structure, the permanent magnet motor has a good adjustment margin on site, which increases the flexibility of installation.

[0030] In summary, the beneficial effects of the utility model are: on the one hand, the large-size full-circle punching sheet is changed to a quarter-circle punching sheet, and the T-key is connected in the magnetic isolation hole to further reduce the size of the punching sheet, and the existing equipment meets the production requirements without upgrading the equipment, thereby reducing production costs and increasing the competitiveness of the product in the market. On the other hand, in the case of the driven end and the active end using the same shaft body, or requiring on-site shaft threading, the technical solution of the utility model can fully adapt to this situation, and the position of the whole machine can be adjusted according to the actual situation, which greatly increases the flexibility of on-site installation.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the protection scope of the utility model in any form, and all technical solutions obtained by equivalent replacement and other methods fall within the protection scope of the utility model. The parts not involved in the utility model are the same as the existing technology or can be implemented by the existing technology.

Claims

1. A block rotor core fixing structure of a permanent magnet motor, comprising a rotor core, a bushing, and a shaft, characterized in that: The bushing is sleeved on the shaft, and the rotor core and the bushing are fastened together by a T-key and bolts and nuts. The rotor core adopts a block rotor structure, which includes a rotor quarter core, magnetic steel, a T-key, a rotor outer end pressure plate and a rotor inner end pressure plate. The rotor quarter core is composed of a quarter of a circumferential punching sheet stacked together, the magnetic steel is pressed into the magnetic steel slot of the rotor quarter core, the T-key is inserted into the magnetic isolation hole of the rotor quarter core, and the rotor outer end pressure plate and the rotor inner end pressure plate are fixed at both ends of the rotor core.

2. The fixed structure of the segmented rotor core of a permanent magnet motor according to claim 1, characterized in that: The T-key is a key plate with a T-shaped cross section, with oblong countersunk through holes distributed at both ends, and hexagonal bolts are inserted into the through holes.

3. The fixed structure of the segmented rotor core of a permanent magnet motor according to claim 1, characterized in that: The bushing comprises two half bushings, the centers of the two half bushings are symmetrical and connected by fasteners.

4. The fixed structure of the segmented rotor core of a permanent magnet motor according to claim 3, characterized in that: The half bushing includes a smooth hole plane, an outer semi-circular barrel, an inner semi-circular barrel and a threaded plane; the surface of the smooth hole plane is evenly distributed with smooth through holes, and the surface of the threaded plane is evenly distributed with threaded through holes, wherein the smooth hole plane and the threaded plane on one half bushing are respectively connected to the threaded plane and the smooth hole plane on the other half bushing, and are fastened together by bolts and nuts.

5. The fixed structure of the segmented rotor core of a permanent magnet motor according to claim 4, characterized in that: The outer circle of the inner semi-circular barrel is connected to the inner end surface of the outer semi-circular barrel through a semi-circular ring bracket and a bracket.

6. The fixed structure of the segmented rotor core of a permanent magnet motor according to claim 4, characterized in that: A keyway for inserting the lower end of the T-key is provided on the outer surface of the outer semi-circular barrel, and a bolt hole communicating with the T-key through hole is provided in the keyway, and a hexagonal bolt passes through the bolt hole and is fixed by a nut.

7. The fixed structure of the segmented rotor core of a permanent magnet motor according to claim 1, characterized in that: The rotor outer end pressure plate is composed of a one-twentieth circular ring, which is located on both sides of the magnetic steel and is locked by a fastening screw; the rotor inner end pressure plate is composed of a one-twelfth circular ring, which is located on both sides of the T-key and is locked by a fastening screw.

8. The fixed structure of the segmented rotor core of a permanent magnet motor according to claim 1, characterized in that: The magnetic steel is a regular rectangular parallelepiped.

9. The fixed structure of the segmented rotor core of a permanent magnet motor according to claim 3, characterized in that: The shaft is a cylinder with no stop on the surface, and the half bushing can be freely adjusted and fixed on the shaft through fasteners.

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