Motor rotor with good heat dissipation performance

Abstract

The utility model relates to a motor rotor, and belongs to the technical field of motor rotors, in particular to a motor rotor with good heat dissipation performance, which comprises a rotor iron core, an output rotating shaft is fixedly arranged at the central position in the rotor iron core, and an installation side cylinder is clamped and sleeved on the outer side wall of the rotor iron core. Two mounting grooves are formed in the outer wall surface of each side of the mounting side cylinder, magnetic steel is fixedly mounted in the mounting grooves, a plurality of heat dissipation grooves are formed in the circumference of the inner side wall of the rotor core at equal intervals, an air guide groove is formed in the outer side wall of the mounting side cylinder, an air guide plate is arranged in the air guide groove, and a rotating shaft is fixedly mounted on the side wall of the air guide plate; according to the utility model, through the rotation of the rotor core, the air deflectors rotate around the rotating shaft along with the influence of centrifugal force, and the arc-shaped ends of the air deflectors introduce external air into the air guide grooves, so that the air flowing speed in the heat dissipation grooves is improved, and the heat dissipation efficiency of the heat dissipation grooves to the magnetic steel is improved; the problem that existing magnetic steel is poor in heat dissipation efficiency is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor rotor technical field, especially a motor rotor that good heat dissipation. BACKGROUND

[0002] During the operation of the motor, the rotating shaft drives the rotor core to rotate. When the rotor rotates, the inside of the motor is a high-temperature environment, and the temperature of the magnetic steel rises, which is prone to demagnetization.

[0003] According to the search, the patent with the announcement number CN216699650U discloses a motor rotor with good heat dissipation, which includes a rotor core, a magnetic steel embedding groove, a magnetic steel, a heat dissipation groove, and a bolt hole. A shaft hole is formed in the center of the rotor core. The magnetic steel embedding grooves are evenly distributed around the rotor core near the edge, and the magnetic steel embedding grooves are arranged in a regular polygon shape. The magnetic steel can be installed in the magnetic steel embedding groove, and glue is injected into the magnetic steel embedding groove to fix it. A heat dissipation groove is formed in the magnetic yoke part of the rotor core, and the area of the heat dissipation groove is not less than 2 / 5 of the cross-sectional area of the rotor core. The bolt hole is located on the end face of the rotor core. The motor rotor with good heat dissipation adjusts the structure of the rotor core, reduces the weight of the rotor core, changes the installation method of the magnetic steel and its relative position structure with the rotor core, effectively reduces the risk of magnetic steel demagnetization and the demagnetization rate of the magnetic steel during the operation of the motor, and reduces the centrifugal force generated during the rotation of the rotor core.

[0004] In the above-mentioned prior art, the heat of the magnetic steel is conducted to the outside of the rotor core through the reinforcing ribs, avoiding the influence of the high local heat of the magnetic steel on the entire magnetic steel in the traditional case. However, in actual use, the contact area between the reinforcing ribs and the air is limited, resulting in unsatisfactory heat dissipation effect inside the reinforcing ribs, which affects the heat dissipation efficiency of the magnetic steel. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a motor rotor with good heat dissipation. Through the rotation of the rotor core, the air guide plate rotates around the rotating shaft under the influence of centrifugal force. One end of the arc-shaped air guide plate introduces external air into the inside of the air guide groove, improves the air flow speed inside the heat dissipation groove, and improves the heat dissipation efficiency of the heat dissipation groove on the magnetic steel.

[0006] The technical solution for achieving the motor rotor with good heat dissipation provided by the utility model comprises a rotor iron core, an output rotating shaft is fixedly installed at the inner center position of the rotor iron core, an installation side cylinder is clamped to the outer side wall of the rotor iron core, two installation grooves are formed in each outer wall surface of the installation side cylinder, a magnetic steel is fixedly installed in the installation groove, a plurality of heat dissipation grooves are equidistantly formed in the inner side wall of the rotor iron core, the plurality of heat dissipation grooves are aligned with the plurality of side walls of the installation side cylinder, a wind guide groove is formed in the outer side wall of the installation side cylinder, the wind guide groove is between the two installation grooves, a wind guide plate is arranged in the wind guide groove, a rotating shaft is fixedly installed on the side wall of the wind guide plate, the rotating shaft is rotatably installed on the inner side wall of the wind guide groove, and the end of the wind guide plate away from the rotating shaft is in an outwardly expanding arc shape.

[0007] In some embodiments, an extrusion groove is formed in the inner side wall of the wind guide plate, and an extension belt is fixedly installed on the side wall of the wind guide plate away from the rotating shaft.

[0008] In some embodiments, a protective pad is fixedly installed on the inner side wall of the wind guide groove.

[0009] In some embodiments, three groups of circumferentially distributed diffusion grooves are arranged in the rotor iron core, a guide plate is fixedly installed on the inner side wall of the wind guide groove, and the bottom end of the guide plate is aligned with the side wall of the adjacent diffusion groove.

[0010] In some embodiments, each group of diffusion grooves is composed of two arc grooves, each group of diffusion grooves is formed in a mirror image on the side wall of the adjacent wind guide groove, and the end of the diffusion groove away from the wind guide groove is communicated with the adjacent heat dissipation groove.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] Firstly, the heat dissipation groove is aligned with each side wall of the installation side cylinder, so that the heat generated by the magnetic steel during work can enter the inside of the heat dissipation groove to heat-dissipate the magnetic steel, the wind guide plate rotates around the rotating shaft under the influence of centrifugal force through the rotation of the rotor iron core, the end of the wind guide plate away from the rotating shaft is in an outwardly expanding arc shape, therefore, the end of the arc shape of the wind guide plate can introduce external air into the inside of the wind guide groove, the air flow speed in the inside of the heat dissipation groove is improved, and the heat dissipation efficiency of the heat dissipation groove on the magnetic steel is improved.

[0013] Secondly, the faster the rotor iron core rotates, the stronger the centrifugal force on the wind guide plate, the deformation of the wind guide plate is intensified through the extrusion groove, the extension belt protrudes outward along with the deformation of the wind guide plate, the length of the wind guide plate is increased, the air that can be introduced by the wind guide plate is increased, and the air flow speed in the inside of the heat dissipation groove is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model is further explained below in combination with the drawings and embodiments:

[0015] Figure 1 It is the whole structure three-dimensional schematic view of the utility model;

[0016] Figure 2 It is the inside structure three-dimensional schematic view of the utility model air guide groove;

[0017] Figure 3 It is the utility model Figure 2 The enlarged view of A in the middle.

[0018] Mark explanation:

[0019] 1, rotor core;2, output shaft;3, heat dissipation groove;4, installation side cylinder;5, magnetic steel;6, air guide groove;7, air guide plate;8, rotating shaft;9, extrusion groove;10, extension belt;11, installation groove;12, diffusion groove;13, guide plate;14, protective pad. Specific implementation

[0020] The utility model is described in detail below, and the technical scheme in the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] The utility model provides a motor rotor that good heat dissipation is improved in this way, and the technical scheme of the utility model is:

[0022] For example Figures 1-3As shown in the figure, a motor rotor with good heat dissipation includes a rotor core 1, an output rotating shaft 2 is fixedly installed at the inner center of the rotor core 1, an installation side cylinder 4 is clamped on the outer wall of the rotor core 1, two installation grooves 11 are formed on each outer wall surface of the installation side cylinder 4, a magnetic steel 5 is fixedly installed in the installation groove 11, a plurality of heat dissipation grooves 3 are equidistantly formed on the inner wall of the rotor core 1, and the plurality of heat dissipation grooves 3 are aligned with the plurality of side walls of the installation side cylinder 4; by aligning the heat dissipation grooves 3 with each side wall of the installation side cylinder 4, the heat generated by the magnetic steel 5 during work can enter the inside of the heat dissipation groove 3, and the magnetic steel 5 is subjected to heat dissipation treatment; a wind guide groove 6 is formed on the outer wall of the installation side cylinder 4, the wind guide groove 6 is between the two installation grooves 11, a wind guide plate 7 is arranged in the wind guide groove 6, a rotating shaft 8 is fixedly installed on the side wall of the wind guide plate 7, the rotating shaft 8 is rotatably installed on the inner wall of the wind guide groove 6, and the end of the wind guide plate 7 away from the rotating shaft 8 is in the shape of an outwardly expanding arc; by rotating the rotor core 1, the wind guide plate 7 rotates around the rotating shaft 8 under the influence of centrifugal force, and the end of the wind guide plate 7 away from the rotating shaft 8 is in the shape of an outwardly expanding arc, so that the end of the arc-shaped wind guide plate 7 can introduce external air into the inside of the wind guide groove 6, improve the air flow speed in the inside of the heat dissipation groove 3, and improve the heat dissipation efficiency of the heat dissipation groove 3 on the magnetic steel 5.

[0023] As shown in the figure, Figures 1-3 In an embodiment, in order to further improve the heat dissipation effect on the magnetic steel 5, a protective pad 14 is fixedly installed on the inner wall of the wind guide groove 6; the side wall of the wind guide plate 7 is supported by the protective pad 14, so that the side wall of the wind guide plate 7 does not contact the inner wall of the wind guide groove 6, and damage to the inner wall of the wind guide groove 6 is avoided; an extrusion groove 9 is formed on the inner wall of the wind guide plate 7, and an extension belt 10 is fixedly installed on the side wall of the wind guide plate 7 away from the rotating shaft 8; the faster the rotor core 1 rotates, the stronger the centrifugal force acting on the wind guide plate 7, the extrusion groove 9 causes the wind guide plate 7 to be deformed more severely, the extension belt 10 protrudes outward along with the deformation of the wind guide plate 7, the length of the wind guide plate 7 is increased, and the air that can be introduced by the wind guide plate 7 is increased, so that the air flow speed in the inside of the heat dissipation groove 3 is improved.

[0024] As shown in the figure, Figures 1-3As shown, in an embodiment, in order to improve the heat dissipation efficiency of the magnetic steel 5, the inside of the rotor core 1 is provided with three groups of circumferentially distributed diffusion grooves 12, each group of diffusion grooves 12 is composed of two arc-shaped grooves, each group of diffusion grooves 12 is mirror-symmetrically opened on the side wall of the adjacent air guide groove 6, one end of the diffusion groove 12 away from the air guide groove 6 is communicated with the adjacent heat dissipation groove 3, the inner side wall of the air guide groove 6 is fixedly installed with a guide plate 13, the bottom end of the guide plate 13 is aligned with the side wall of the adjacent diffusion groove 12;The air introduced into the inside of the air guide groove 6 by the guide plate 13 is introduced into the inside of the diffusion groove 12, the heat at the bottom end of the magnetic steel 5 is taken away through the diffusion groove 12, and the heat dissipation efficiency of the magnetic steel 5 is further improved.

[0025] The specific working method is: through the rotation of the rotor core 1, the air guide plate 7 rotates around the rotating shaft 8 under the influence of centrifugal force, and one end of the air guide plate 7 away from the rotating shaft 8 is in the shape of an outwardly expanding arc, so that one end of the arc-shaped air guide plate 7 introduces external air into the inside of the air guide groove 6, improves the air flow speed in the heat dissipation groove 3, and improves the heat dissipation efficiency of the heat dissipation groove 3 on the magnetic steel 5;When the rotor core 1 rotates faster, the centrifugal force acting on the air guide plate 7 is stronger, the air guide plate 7 is deformed more severely through the extrusion groove 9, the extension belt 10 is protruded outwardly along with the deformation of the air guide plate 7, the length of the air guide plate 7 is increased, so that the air introduced by the air guide plate 7 is increased, and the air flow speed in the heat dissipation groove 3 is improved;The air introduced into the inside of the air guide groove 6 by the guide plate 13 is introduced into the inside of the diffusion groove 12, the heat at the bottom end of the magnetic steel 5 is taken away through the diffusion groove 12, and the heat dissipation efficiency of the magnetic steel 5 is further improved.

[0026] The technical means disclosed in the utility model scheme is not limited to the technical means disclosed in the above technical means, and also includes technical solutions composed of the above technical features and equivalent replacements. The unfinished matters of the utility model belong to the common knowledge of those skilled in the art.

Claims

1. A motor rotor with good heat dissipation, comprising a rotor core (1), an output shaft (2) fixedly installed at the center of the rotor core (1), an mounting sleeve (4) fitted onto the outer wall of the rotor core (1), two mounting grooves (11) being formed on each side of the mounting sleeve (4), magnets (5) being fixedly installed inside the mounting grooves (11), and a plurality of heat dissipation grooves (3) being equidistantly formed on the inner side wall of the rotor core (1), the plurality of heat dissipation grooves (3) being aligned with the plurality of side walls on the mounting sleeve (4), characterized in that: The outer side wall of the installation side cylinder (4) is provided with a wind guide groove (6), the wind guide groove (6) is between two installation grooves (11), the inside of the wind guide groove (6) is provided with a wind guide plate (7), the side wall of the wind guide plate (7) is fixedly provided with a rotating shaft (8), the rotating shaft (8) is rotatably installed on the inner side wall of the wind guide groove (6), and the end of the wind guide plate (7) away from the rotating shaft (8) is in an outwardly expanding arc shape.

2. The electric motor rotor with good heat dissipation according to claim 1, characterized in that: The inner side wall of the wind guide plate (7) is provided with an extrusion groove (9), and the side wall of the wind guide plate (7) away from the rotating shaft (8) is fixedly provided with an extension belt (10).

3. The electric motor rotor with good heat dissipation according to claim 1, characterized in that: The inner side wall of the wind guide groove (6) is fixedly provided with a protection pad (14).

4. The electric motor rotor with good heat dissipation according to claim 1, characterized in that: The inside of the rotor core (1) is provided with three groups of circumferentially distributed diffusion grooves (12), the inner side wall of the wind guide groove (6) is fixedly provided with a guide plate (13), and the bottom end of the guide plate (13) is aligned with the side wall of the adjacent diffusion groove (12).

5. The electric motor rotor with good heat dissipation according to claim 4, characterized in that: Each group of the diffusion grooves (12) is composed of two arc grooves, each group of the diffusion grooves (12) is mirror-symmetrically provided on the side wall of the adjacent wind guide groove (6), and the end of the diffusion groove (12) away from the wind guide groove (6) is communicated with the adjacent heat dissipation groove (3).

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