Surface-mounted high-speed permanent magnet rotor

Abstract

The surface-mounted high-speed permanent magnet rotor comprises an iron core, magnetic steel, an aluminum sleeve, a carbon fiber sleeve and aluminum end plates, the magnetic steel is attached to the periphery of the iron core in a surrounding mode, the aluminum sleeve is sleeved outside the magnetic steel, the carbon fiber sleeve is sleeved outside the aluminum sleeve, the aluminum end plates are arranged at the two ends of the iron core, and a plurality of screw holes are formed in the surfaces of the aluminum end plates in the circumferential direction. A balancing weight is arranged in the screw hole. According to the utility model, the aluminum sleeve is sleeved outside the magnetic steel, the carbon fiber sleeve is sleeved outside the aluminum sleeve, and the aluminum sleeve and the carbon fiber sleeve cooperate with each other to support the magnetic steel, so that the strength of the rotor is greatly improved, and the rotating speed of the rotor can reach 30000-50000 RPM; the outer circle of the rotor core is designed into a dodecagon with a boss in the middle, and the magnetic steel is designed into bread-shaped magnetic steel matched with the dodecagon boss. The magnetic steel is bonded on the 12-deformation iron core through epoxy glue, and the magnetic steel is axially divided into four sections, so that the loss of the magnetic steel is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotor field, especially the appearance red table paste formula high speed permanent magnet rotor. BACKGROUND

[0002] With market to commercial refrigeration compressor and unit more and more high energy efficiency requirement, compressor motor is developing towards permanent magnetization and high speed. This is the current motor industry development direction. In centrifugal compressor and its related application field, such as high speed turbine, high speed air blowing system, water treatment, the speed requirement reached 20000RPM above.

[0003] Traditional permanent magnet motor, in order to pursue high efficiency, high torque, often the size of magnetic steel design, corresponding to the rotor punching piece on the magnetic steel groove is big, at the same time, in order to pursue high efficiency, reduce the magnetic flux leakage, so the silicon steel sheet on the position of the magnetic bridge of the rotor punching piece is often designed to be very small, so although it is beneficial to improve the efficiency of the motor and increase the power of the motor. But due to the large size of the magnetic steel groove on the punching piece and the small link magnetic bridge, the mechanical strength of the punching piece is poor, and it cannot run at high speed. SUMMARY

[0004] In view of the defects existing in the prior art, the main purpose of the utility model is to overcome the shortcomings of the prior art, and disclose a surface-mounted high-speed permanent magnet rotor, which comprises a core, a magnetic steel, an aluminum sleeve, a carbon fiber sleeve and an aluminum end plate, the magnetic steel is circumferentially attached to the core, the aluminum sleeve is sleeved outside the magnetic steel, the carbon fiber sleeve is sleeved outside the aluminum sleeve, the aluminum end plate is arranged at both ends of the core, a plurality of screw holes are arranged around the circumference of the surface of the aluminum end plate, and counterweights are arranged in the screw holes.

[0005] Further, the core is recessed with a positioning groove in the circumferential direction, and a positioning portion is arranged on the magnetic steel.

[0006] Further, the aluminum sleeve is tightly matched with the magnetic steel.

[0007] Further, the inner diameter of the aluminum sleeve is 0.15±0.01 smaller than the outer diameter of the magnetic steel.

[0008] Further, one end of the aluminum sleeve is chamfered.

[0009] Further, the inner diameter of the carbon fiber sleeve is 0.02mm larger than the outer diameter of the aluminum sleeve.

[0010] Further, the cross section of the area where the core is attached to the magnetic steel is a regular dodecagon.

[0011] Further, the aluminum end plate is tightly matched with both ends of the core.

[0012] Further, the inner diameter of the aluminum end plate is 0.5±0.05mm smaller than the outer diameter of the iron core.

[0013] The utility model discloses the beneficial effects achieved:

[0014] The utility model discloses a aluminium sleeve is equipped with in the magnetic steel outer cover, and again a carbon fiber sleeve is equipped with outside aluminium sleeve, mutual cooperation, support magnetic steel, the strength of rotor has been greatly improved, can make the rotating speed of rotor reach 30000RPM-50000RPM, the outer circle of rotor iron core is designed as the 12 -sided polygon of middle -mounting boss, and the magnetic steel is designed as the bread -shape magnetic steel of cooperation with 12 -sided polygon boss. Magnetic steel is bonded with 12 deformation's iron core with epoxy glue, and the magnetic steel is divided into four sections axially, to reduce the magnetic steel loss. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic diagram of a surface-mounted high-speed permanent magnet rotor of the utility model;

[0016] Figure 2 It is a sectional view of a surface-mounted high-speed permanent magnet rotor of the utility model;

[0017] Figure 3 It is a structure schematic diagram of an iron core;

[0018] Figure 4 It is a structure schematic diagram of a magnetic steel;

[0019] The reference signs are as follows:

[0020] 1, iron core, 2, magnetic steel, 3, aluminium sleeve, 4, carbon fiber sleeve, 5, aluminium end plate, 11, positioning groove, 21, positioning part, 51, screw hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the utility model is further explained in detail below by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0022] A surface-mounted high-speed permanent magnet rotor, as shown in Figures 1-4 It includes iron core 1, magnetic steel 2, aluminium sleeve 3, carbon fiber sleeve 4 and aluminium end plate 5, and the magnetic steel 2 is attached around the circumference of the iron core 1 by glue, the aluminium sleeve 3 is sleeved outside the magnetic steel 2, the carbon fiber sleeve 4 is sleeved outside the aluminium sleeve 3, the aluminium end plate 5 is arranged at the two ends of the iron core 1, the surface of the aluminium end plate 5 is provided with a plurality of screw holes 51 around its circumference, and the screw holes 51 are provided with counterweights. For unbalanced counterweight. Among them, the counterweight is a copper stud, and the copper stud is threadedly matched with the screw hole.

[0023] In an embodiment, as Figures 1-4As shown, the circumferential recess of the iron core 1 is provided with a positioning groove 11, and the magnetic steel 2 is provided with a matching positioning part 21. Through the cooperation of the positioning groove 11 and the positioning part 21, a positioning and guiding effect is achieved, which is beneficial to the accurate pasting of the magnetic steel.

[0024] In an embodiment, as shown in the figure, Figures 1-4 As shown, the aluminum sleeve 3 is tightly matched with the magnetic steel 2. In turn, the magnetic steel 2 is reliably fixed on the iron core 1. Preferably, the inner diameter of the aluminum sleeve is 0.15±0.01 smaller than the outer diameter of the magnetic steel.

[0025] In an embodiment, as shown in the figure, Figures 1-4 As shown, one end of the aluminum sleeve 3 is provided with a chamfer to facilitate the pressing of the carbon fiber sleeve 4 into the outer aluminum sleeve 3.

[0026] In an embodiment, as shown in the figure, Figures 1-4 As shown, the inner diameter of the carbon fiber sleeve 4 is 0.02mm larger than the outer diameter of the aluminum sleeve 3. Since the carbon fiber is a non-machining part, the inner hole is not smooth, so it needs to be cold-pressed into the outer aluminum sleeve.

[0027] In an embodiment, as shown in the figure, Figures 1-4 As shown, the cross section of the area where the iron core 1 is attached to the magnetic steel is a regular dodecagon.

[0028] In the above embodiment, as shown in the figure, Figures 1-4 As shown, the magnetic steel 2 is axially divided into four sections, thereby reducing the magnetic steel loss.

[0029] In an embodiment, as shown in the figure, Figures 1-4 As shown, the aluminum end plate 5 is tightly matched with the two ends of the iron core 1. Specifically, the inner diameter of the aluminum end plate 5 is 0.5±0.05mm smaller than the outer diameter of the two ends of the iron core 1. The aluminum end plate 5 is installed at the two ends of the iron core by heating.

[0030] The above is only a preferred embodiment of the present application, and is not intended to limit the scope of the application; if the application is modified or replaced without departing from the spirit and scope of the application, it should be covered within the scope of protection of the claims of the present application.

Claims

1. A surface-mounted high-speed permanent-magnet rotor, characterized by The application relates to a magnetic core, which comprises an iron core, a magnetic steel, an aluminum sleeve, a carbon fiber sleeve and an aluminum end plate, the magnetic steel is circumferentially attached to the iron core, the aluminum sleeve is sleeved outside the magnetic steel, the carbon fiber sleeve is sleeved outside the aluminum sleeve, the aluminum end plate is arranged at two ends of the iron core, the surface of the aluminum end plate is provided with a plurality of screw holes around the circumference thereof, and the screw holes are provided with counterweights.

2. A surface-mounted high-speed permanent-magnet rotor according to claim 1, characterized in that A positioning groove is arranged on the circumference of the iron core, and a matching positioning part is arranged on the magnetic steel.

3. A surface-mounted high-speed permanent-magnet rotor according to claim 1, characterized in that The aluminum sleeve is tightly matched with the magnetic steel.

4. A surface-mounted high-speed permanent-magnet rotor according to claim 3, characterized in that The inner diameter of the aluminum sleeve is 0.15+ / -0.01 smaller than the outer diameter of the magnetic steel.

5. A surface-mounted high-speed permanent-magnet rotor according to claim 1, characterized in that One end of the aluminum sleeve is provided with a chamfer.

6. A surface-mounted high-speed permanent-magnet rotor according to claim 1, characterized in that The inner diameter of the carbon fiber sleeve is 0.02mm larger than the outer diameter of the aluminum sleeve.

7. A surface-mounted high-speed permanent-magnet rotor according to claim 1, characterized in that The cross section of the area where the iron core is attached to the magnetic steel is a regular dodecagon.

8. A surface-mounted high-speed permanent-magnet rotor according to claim 1, characterized in that The aluminum end plate is tightly matched with the two ends of the iron core.

9. A surface-mounted high-speed permanent-magnet rotor according to claim 8, characterized in that The inner diameter of the aluminum end plate is 0.5+ / -0.05mm smaller than the outer diameter of the two ends of the iron core.

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