Bending-resistant motor rotor

Abstract

The utility model discloses an anti-bending motor rotor which comprises a rotor core, permanent magnets are uniformly installed in the rotor core, ventilation holes are uniformly arranged in the rotor core, a connecting shaft is installed in the rotor core, a connecting groove is arranged in the rotor core, the connecting groove is attached to the connecting shaft, and the connecting shaft is connected with the rotor core. And cooling mechanisms are uniformly arranged in the rotor core. According to the anti-bending motor rotor, the cooling liquid in the liquid storage tank is slowly distributed on the outer side of the connecting shaft through the cooling liquid in the cooling mechanism, heat dissipation of the rotor iron core and the connecting shaft which rotate at a high speed is facilitated, and the heat dissipation effect is further improved in cooperation with the ventilation openings; the risk of demagnetization of the permanent magnet under the continuous high temperature effect is avoided, and a certain protection effect on the motor rotor is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a bending-resistant motor rotor. Background Art

[0002] The application of electric motors is becoming more and more widespread. Permanent magnet motors are widely used in refrigeration compressors due to their simple structure, reliable operation, small size, light weight and good operating performance. According to the different positions of the magnets on the rotor, permanent magnet motors can generally be divided into surface type and built-in type. Surface type permanent magnet motors can be divided into protruding type and embedded type according to the different rotor magnetic circuit structures. The rotor part of the surface embedded permanent magnet motor contains an iron core extension.

[0003] Chinese Patent Authorization Publication No. CN211239476U discloses a rotor and a motor of a motor, wherein the rotor includes a rotating shaft, a rotor core, and a plurality of magnetic steels inserted into the rotor core, wherein the plurality of magnetic steels are arranged circumferentially along the axis of the rotor core, the rotor core includes a first punching sheet and a second punching sheet, wherein the first punching sheet and the second punching sheet each include a plurality of magnetic steel slots provided along the circumferential direction of the rotor core, wherein the magnetic steel slots are provided with a first magnetic flux barrier at one end close to the rotating shaft, and a second magnetic flux barrier is formed between two adjacent first magnetic flux barriers, and through a reasonable combination of the two rotor punching sheets, the mechanical structure strength of the rotor core is increased, and the leakage magnetic flux of the rotor can be effectively reduced, thereby providing a motor with reliable operation and high efficiency. The above-mentioned prior art solution has the following shortcomings: during the operation of the permanent magnet motor, the inner rotor generates a large amount of heat, which is blocked by the air gap between the inner rotor and the stator, resulting in poor heat dissipation of the inner rotor, and the permanent magnet is at risk of demagnetization under continuous high temperature, causing the permanent magnet motor to fail. Therefore, it is necessary to design a bending-resistant motor rotor to solve the above problems. Utility Model Content

[0004] The purpose of the present invention is to provide a motor rotor that is resistant to bending, so as to solve the problem in the above background art that the motor rotor generates huge heat during high-speed rotation.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a bending-resistant motor rotor, comprising a rotor core, wherein permanent magnets are evenly installed inside the rotor core, ventilation holes are evenly provided inside the rotor core, a connecting shaft is installed inside the rotor core, a connecting groove is provided inside the rotor core, the connecting groove is in contact with the connecting shaft, a cooling mechanism is evenly provided inside the rotor core, and cooling the connection between the rotor core and the connecting shaft through the cooling mechanism is beneficial to extending the service life of the connecting shaft, a sealing mechanism is evenly provided inside the rotor core to prevent the cooling oil of the cooling mechanism from flowing out from the inside of the liquid storage tank, upper end covers and lower end covers are respectively installed at both ends of the rotor core, connecting rings are evenly installed on the outside of the connecting shaft, and support rods are evenly installed on the bottom end of the connecting ring, screw holes are evenly provided inside the upper end cover, and fixing bolts are installed inside the screw holes, and the fixing bolts pass through the inside of the fixing bolts.

[0006] Preferably, the cooling mechanism includes a receiving tank arranged inside the rotor core, a liquid adding tank is arranged on one side of the receiving tank, liquid storage tanks are evenly arranged inside the rotor core, and the liquid storage tanks are connected to the liquid adding tank, and liquid infusion tanks are evenly arranged on the side of the liquid storage tank away from the liquid adding tank, and the liquid infusion tanks are all connected to the connecting tank.

[0007] Preferably, the infusion troughs are arranged in a wavy shape, and are evenly spaced apart on the outside of the connecting shaft.

[0008] Preferably, the sealing mechanism includes a sealing gasket installed inside the accommodating groove, and sealing blocks are evenly installed on one side of the sealing gasket. The interior of the rotor core is provided with sealing grooves, and the sealing grooves are connected to the sealing blocks.

[0009] Preferably, the support rods are arranged in a cross shape on the outside of the connecting ring, the support rods and the connecting ring are hingedly connected, and the angle between the support rods and the connecting axis is set to forty-five degrees.

[0010] Preferably, mounting grooves are evenly provided inside the connecting ring, and balls are installed inside the mounting grooves, and one side of the balls is connected to the inner wall of the connecting shaft.

[0011] Preferably, grooves are evenly arranged inside the rotor core, and the cross-sections of the grooves are all arranged to be semicircular.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the anti-bending motor rotor improves the heat dissipation and anti-bending effects;

[0013] 1. The coolant inside the cooling mechanism is slowly distributed to the outside of the connecting shaft, which is beneficial for dissipating heat from the high-speed rotating rotor core and connecting shaft. Combined with the ventilation holes, the heat dissipation effect is further improved, avoiding the risk of demagnetization of the permanent magnet under continuous high temperature, and playing a certain protective role for the motor rotor.

[0014] Furthermore, the sealing mechanism seals the liquid adding tank with a sealing cushion to maintain the sealing inside the liquid storage tank, thereby preventing the coolant inside the liquid storage tank from leaking and affecting the normal use of the motor rotor;

[0015] Furthermore, the cross-section of the grooves is set to be semicircular, which effectively shortens the distance to the permanent magnet, thereby reducing magnetic leakage;

[0016] 2. The connecting ring and the support rod are used to support the connecting shaft, preventing the connecting shaft from being affected by external forces and bending during high-speed rotation. The fixing bolts are used to secure the support rod as a whole to the upper end cover.

[0017] Furthermore, the balls maintain the support of the connecting ring on the connecting shaft, effectively reducing the friction between the connecting shaft and the connecting ring, and playing a certain protective role on the connecting shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the three-dimensional structure at A in the middle;

[0021] Figure 4 This is a schematic diagram of the side cross-sectional structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the support ring of the utility model from a top view;

[0023] Figure 6 This is a schematic diagram of the three-dimensional cross-sectional structure of the rotor core of the utility model.

[0024] In the figure: 1. Rotor core; 2. Permanent magnet; 3. Ventilation hole; 4. Connecting groove; 5. Connecting shaft; 6. Liquid adding groove; 7. Liquid storage groove; 8. Infusion groove; 9. Receiving groove; 10. Sealing pad; 11. Sealing block; 12. Sealing groove; 13. Support rod; 14. Fixing bolt; 15. Upper end cover; 16. Lower end cover; 17. Connecting ring; 18. Mounting groove; 19. Ball bearing; 20. Screw hole; 21. Groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1-6 , this utility provides the following technical solutions:

[0027] Example 1: In order to solve the problem of heat dissipation inside the motor rotor in the prior art, the following solution is disclosed. For details, please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 , including a rotor core 1, permanent magnets 2 are evenly installed inside the rotor core 1, ventilation holes 3 are evenly provided inside the rotor core 1, a connecting shaft 5 is installed inside the rotor core 1, a connecting groove 4 is provided inside the rotor core 1, the connecting groove 4 is in contact with the connecting shaft 5, and a cooling mechanism is evenly provided inside the rotor core 1. Through the cooling mechanism, the connection between the rotor core 1 and the connecting shaft 5 is cooled, which is beneficial to extending the service life of the connecting shaft 5; the cooling mechanism includes a receiving groove 9 provided inside the rotor core 1, a liquid adding groove 6 is provided on one side of the receiving groove 9, a liquid storage groove 7 is evenly provided inside the rotor core 1, and the liquid storage groove 7 is connected to the liquid adding groove 6, and an infusion groove 8 is evenly provided on the side of the liquid storage groove 7 away from the liquid adding groove 6, and the infusion groove 8 is connected to the connecting groove 4; the infusion groove 8 is arranged in a wavy shape, and the infusion groove 8 is evenly spaced on the outside of the connecting shaft 5; grooves 21 are evenly provided inside the rotor core 1, and the cross-section of the groove 21 is semicircular.

[0028] In this embodiment, when in use, coolant is injected into the liquid storage tank 7 through the liquid adding tank 6, and the coolant is released to the outside of the connecting shaft 5 through the infusion tank 8. The coolant is evenly distributed on the outside of the connecting shaft 5, and the heat generated during the high-speed rotation of the connecting shaft 5 and the rotor core 1 is cooled. Combined with the ventilation holes 3, the overall internal air circulation is maintained, and the rotor core 1 is further cooled, avoiding the risk of demagnetization of the permanent magnet under continuous high temperature, thereby playing a certain protective role for the motor rotor.

[0029] Embodiment 2: In this embodiment, different from the embodiment 1, the sealing effect is improved during the release of the coolant. Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the interior of the rotor core 1 is evenly provided with a blocking mechanism to prevent the cooling oil of the cooling mechanism from flowing out from the interior of the liquid storage tank 7. The blocking mechanism includes a sealing gasket 10 installed in the accommodating groove 9, and a sealing block 11 is evenly installed on one side of the sealing gasket 10. The interior of the rotor core 1 is provided with a sealing groove 12, and the sealing groove 12 is connected to the sealing block 11.

[0030] In this embodiment, during use, the sealing groove 12 is connected to the sealing block 11 to improve the sealing performance of the sealing gasket 10 and the rotor core 1 after installation, thereby preventing the coolant from leaking through the liquid adding tank 6 and affecting the normal heat dissipation of the motor rotor, thereby maintaining the heat dissipation effect of the coolant on the motor rotor.

[0031] Embodiment 3: In this embodiment, unlike the embodiment 1, the anti-bending effect of the motor rotor is improved. Figure 4 、 Figure 5 and Figure 6 As shown, the upper end cover 15 and the lower end cover 16 are respectively installed at both ends of the rotor core 1, the outer side of the connecting shaft 5 is evenly installed with a connecting ring 17, the bottom end of the connecting ring 17 is evenly installed with a support rod 13, the interior of the upper end cover 15 is evenly provided with screw holes 20, and the interior of the screw holes 20 is installed with fixing bolts 14, and the fixing bolts 14 all pass through the interior of the fixing bolts 14; the support rods 13 are arranged in a cross shape on the outer side of the connecting ring 17, and the support rods 13 and the connecting ring 17 are hingedly connected, and the angle between the support rods 13 and the connecting shaft 5 is set to forty-five degrees; the interior of the connecting ring 17 is evenly provided with mounting grooves 18, and the interior of the mounting grooves 18 is installed with balls 19, and one side of the balls 19 is connected to the inner wall of the connecting shaft 5.

[0032] In this embodiment, when in use, the angle between the support rod 13 and the connecting shaft 5 is forty-five degrees, and the stability of the triangle is utilized to support the protruding portion of the connecting shaft 5, thereby effectively improving the overall anti-bending effect. In conjunction with the ball 19, the connecting ring 17 maintains support for the connecting shaft 5, and also effectively reduces the friction between the connecting shaft 5 and the connecting ring 17, thereby providing a certain degree of protection for the connecting shaft 5 and enhancing the practicality of the motor rotor.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bending-resistant motor rotor, comprising a rotor core (1), wherein permanent magnets (2) are evenly installed inside the rotor core (1), and characterized in that: The rotor core (1) is evenly provided with ventilation holes (3), the rotor core (1) is installed with a connecting shaft (5), the rotor core (1) is provided with a connecting groove (4), the connecting groove (4) is in contact with the connecting shaft (5), the rotor core (1) is evenly provided with a cooling mechanism, and the connection between the rotor core (1) and the connecting shaft (5) is cooled by the cooling mechanism, which is beneficial to extending the service life of the connecting shaft (5), and the rotor core (1) is evenly provided with a blocking mechanism. In order to prevent the cooling oil of the cooling mechanism from flowing out from the inside of the liquid storage tank (7), the two ends of the rotor core (1) are respectively installed with an upper end cover (15) and a lower end cover (16), the outer side of the connecting shaft (5) is evenly installed with a connecting ring (17), the bottom end of the connecting ring (17) is evenly installed with a support rod (13), the interior of the upper end cover (15) is evenly provided with screw holes (20), and the interior of the screw holes (20) is installed with fixing bolts (14), and the fixing bolts (14) all pass through the interior of the fixing bolts (14).

2. The anti-bending motor rotor according to claim 1, characterized in that: The cooling mechanism comprises a receiving tank (9) arranged inside the rotor core (1), a liquid adding tank (6) being arranged on one side of the receiving tank (9), liquid storage tanks (7) being evenly arranged inside the rotor core (1), and the liquid storage tanks (7) being connected to the liquid adding tank (6), and liquid infusion tanks (8) being evenly arranged on the side of the liquid storage tank (7) away from the liquid adding tank (6), and the liquid infusion tanks (8) being evenly arranged on the side of the liquid storage tank (7) away from the liquid adding tank (6), and the liquid infusion tanks (8) being connected to the connecting tank (4).

3. The anti-bending motor rotor according to claim 2, characterized in that: The infusion troughs (8) are arranged in a wavy shape, and the infusion troughs (8) are arranged at equal intervals on the outside of the connecting shaft (5).

4. The anti-bending motor rotor according to claim 1, characterized in that: The blocking mechanism comprises a sealing gasket (10) installed inside the receiving groove (9), and a sealing block (11) is evenly installed on one side of the sealing gasket (10). A sealing groove (12) is provided inside the rotor core (1), and the sealing groove (12) is connected to the sealing block (11).

5. The anti-bending motor rotor according to claim 4, characterized in that: The support rods (13) are arranged in a cross shape on the outside of the connecting ring (17), the support rods (13) and the connecting ring (17) are hingedly connected, and the angle between the support rods (13) and the connecting shaft (5) is set to forty-five degrees.

6. The anti-bending motor rotor according to claim 1, characterized in that: The interior of the connecting ring (17) is evenly provided with mounting grooves (18), and the interior of the mounting grooves (18) is installed with balls (19), and one side of the balls (19) is connected to the inner wall of the connecting shaft (5).

7. The anti-bending motor rotor according to claim 1, characterized in that: Grooves (21) are evenly arranged inside the rotor core (1), and the cross-sections of the grooves (21) are all arranged to be semicircular.

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