Motor stator and rotor with noise reduction function

Abstract

The invention discloses a motor stator and a motor rotor with a noise reduction function, relates to the technical field of asynchronous motors, and aims to solve the problems that radial force can be generated on the stator and the rotor in the background technology, so that electromagnetic vibration and noise are caused, the radial vibration easily causes resonance with a motor stator core, and resonance noise is generated. According to the scheme, the motor comprises a main shaft, a rotor iron core and a stator iron core, a through rotor groove is formed in the outer wall of one side of the rotor iron core, and connecting mechanisms are arranged on the outer walls, located at the two ends of the rotor iron core, of the main shaft; the connecting mechanism comprises a mounting ring slidably arranged on the outer wall of the main shaft in a sleeving mode, a limiting ring fixedly arranged on the outer wall of one side of the mounting ring, a plurality of clamping rods fixedly arranged on the outer wall of one side of the mounting ring, a plurality of connecting rods fixedly arranged on the outer wall of one side of the mounting ring and four blocking blocks. According to the invention, resonance between the stator core and the rotor core can be prevented, resonance noise can be reduced, the noise can be further suppressed, and the practicability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of asynchronous motors, and in particular to a motor stator and rotor with a noise reduction function. Background Art

[0002] An asynchronous motor, also known as an induction motor, is an AC motor that converts electromechanical energy into mechanical energy by generating electromagnetic torque through the interaction between the rotating air gap magnetic field and the induced current in the rotor winding. A three-phase asynchronous motor's stator windings, when symmetrically voltage is applied, produces a rotating air gap magnetic field. The rotor winding conductors cut through this magnetic field, generating an induced electromotive force. Since the rotor windings are short-circuited, a rotor current is generated. The interaction between the rotor current and the air gap magnetic field generates electromagnetic torque, which drives the rotor to rotate. The motor's speed must be lower than the synchronous speed of the magnetic field. Only then can the rotor conductors induce an electromotive force, generating rotor current and electromagnetic torque. Therefore, this motor is called an asynchronous motor, also known as an induction motor.

[0003] The basic characteristics of asynchronous motors are that the rotor winding does not need to be connected to other power sources, and its stator current is directly taken from the AC power system. Compared with other motors, asynchronous motors have a simple structure, are easy to manufacture, use and maintain, have high operational reliability, are light in weight and low in cost. Taking three-phase asynchronous motors as an example, compared with DC motors of the same power and speed, the former weighs only half of the latter and costs only one-third. Asynchronous motors are also easy to derive various series of products according to the requirements of different environmental conditions. They also have load characteristics close to constant speed and can meet the requirements of most industrial and agricultural production machinery traction.

[0004] Based on the stator and rotor of the asynchronous motor in the prior art, when in use, the main magnetic flux enters the air gap radially and generates radial force on the stator and rotor, thereby causing electromagnetic vibration and noise. The radial vibration easily causes resonance with the stator core of the motor, generating resonance noise. Summary of the Invention

[0005] The present invention provides a motor stator and rotor with noise reduction function, which solves the problem in the prior art that radial forces are generated on the stator and rotor of asynchronous motors, thereby causing electromagnetic vibration and noise, and that radial vibration easily causes resonance with the motor stator core, generating resonance noise.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A motor stator and rotor with a noise reduction function, comprising a main shaft, a rotor core and a stator core, wherein a rotor slot is provided on the outer wall of one side of the rotor core, and the outer walls of the main shaft at both ends of the rotor core are provided with connecting mechanisms, the connecting mechanism comprising a mounting ring slidably mounted on the outer wall of the main shaft, a limit ring fixed on the outer wall of one side of the mounting ring, a plurality of clamping rods fixed on the outer wall of one side of the mounting ring, a plurality of connecting rods fixed on the outer wall of one side of the mounting ring, and four blocking blocks respectively fixed on the outer walls of one end of the plurality of connecting rods, a plurality of slots are provided on the outer wall of one end of the main shaft, and a heat dissipation mechanism is provided in each of the plurality of slots, the heat dissipation mechanism comprising an insert and a fan blade, a plurality of stator slots are provided on the outer wall of one side of the stator core, and a noise reduction mechanism is provided on the outer wall of one end of the main shaft, the noise reduction mechanism comprising a mounting cover mounted on the outer wall of one end of the main shaft, a first sound insulation cover fixed on the inner wall of one side of the mounting cover, and a second sound insulation cover fixed on the inner wall of one side of the mounting cover.

[0008] Preferably, bearings are inserted into the outer walls of both ends of the main shaft, and grooves are opened on the outer walls of both ends of the main shaft close to the two bearings, and retaining springs are clamped in the two grooves.

[0009] Preferably, a plurality of connection grooves are opened on the outer wall of one side of the rotor core, and the plurality of connection grooves are filled with sound-absorbing cotton.

[0010] Preferably, a plurality of fixing grooves are opened on the outer walls of both sides of the rotor core, and a plurality of clamping rods are respectively inserted into the fixing grooves, and a plurality of the blocking blocks are respectively inserted into a plurality of connecting grooves.

[0011] Preferably, the insert block is inserted into the slot, and one end of the insert block abuts against the inner wall of the limiting ring.

[0012] Preferably, a fixing ring is sleeved on the outer wall of one end of the main shaft, and one side of the fixing ring abuts against the outer wall of the bearing, and one end of the insert abuts against the inner wall of the fixing ring.

[0013] Preferably, the outer wall of one side of the stator core is provided with mounting grooves distributed at equal distances, and sound insulation felts are inserted into several of the mounting grooves.

[0014] Preferably, a fastening bolt is screwed onto the inner wall of the mounting cover, and the fastening bolt is screwed onto the outer wall of one end of the main shaft, and sound insulation cotton is bonded onto the inner wall of the mounting cover, the outer wall of the first sound insulation cover, and the outer wall of the second sound insulation cover.

[0015] Through the above solution, the specially designed rotor slots and stator slots cooperate with each other to prevent the stator core and the rotor core from resonating, thereby reducing the resonance noise. At the same time, sound-absorbing cotton is arranged in the rotor core, and sound insulation felt is arranged in the stator core to further reduce the noise generated during the operation of the asynchronous motor. When part of the noise is transmitted in the motor, it hits the outer walls of the mounting cover, the first sound insulation cover and the second sound insulation cover, causing the noise to be refracted, thereby reducing the noise intensity.

[0016] The beneficial effects of the present invention are:

[0017] The specially designed rotor slots and stator slots cooperate with each other to prevent the stator core and the rotor core from resonating and reduce the resonance noise. At the same time, sound-absorbing cotton is arranged in the rotor core and sound insulation felt is arranged in the stator core to further reduce the noise generated when the asynchronous motor is running. Part of the noise hits the outer walls of the mounting cover, the first sound insulation cover and the second sound insulation cover when it is transmitted in the motor, causing the noise to be refracted, thereby reducing the noise intensity, preventing the stator core and the rotor core from resonating and reducing the resonance noise. At the same time, the noise can be further suppressed, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall main structure of the motor stator and rotor with noise reduction function proposed by the present invention.

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure of a motor stator and rotor with noise reduction function proposed by the present invention.

[0020] Figure 3 This is a schematic diagram of the main shaft structure of the motor stator and rotor with noise reduction function proposed by the present invention.

[0021] Figure 4 This is a schematic diagram of the main structure of the rotor core of a motor stator and rotor with noise reduction function proposed by the present invention.

[0022] Figure 5 This is a schematic diagram of the main structure of a connection mechanism between the stator and rotor of a motor with a noise reduction function proposed by the present invention.

[0023] Figure 6 This is a side structural schematic diagram of a connection mechanism between a motor stator and rotor with a noise reduction function proposed by the present invention.

[0024] Figure 7 This is a schematic diagram of the main structure of a heat dissipation mechanism for a motor stator and rotor with noise reduction function proposed by the present invention.

[0025] Figure 8This is a schematic diagram of the main structure of the fixing ring of the motor stator and rotor with noise reduction function proposed by the present invention.

[0026] Figure 9 This is a schematic diagram of the main structure of the stator core of a motor stator and rotor with noise reduction function proposed by the present invention.

[0027] Figure 10 This is a schematic cross-sectional structure diagram of a noise reduction mechanism for a motor stator and rotor with noise reduction function proposed by the present invention.

[0028] In the figure: 1. Main shaft; 2. Bearing; 3. Rotor core; 31. Rotor slot; 32. Connecting slot; 4. Connecting mechanism; 401. Mounting ring; 402. Limiting ring; 403. Clamping rod; 404. Connecting rod; 405. Block; 5. Slot; 6. Heat dissipation mechanism; 601. Insert block; 602. Fan blade; 7. Fixing ring; 8. Stator core; 81. Stator slot; 82. Mounting slot; 9. Noise reduction mechanism; 901. Mounting cover; 902. First sound insulation cover; 903. Second sound insulation cover. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Example 1, reference Figure 1-10A motor stator and rotor with noise reduction function includes a main shaft 1, a rotor core 3 and a stator core 8. Bearings 2 are inserted into the outer walls of both ends of the main shaft 1. A slot is opened on the outer wall of the two ends of the main shaft 1 near the two bearings 2. A retaining spring is clamped in the two slots. A rotor slot 31 is opened on the outer wall of one side of the rotor core 3. A plurality of connecting slots 32 are opened on the outer wall of one side of the rotor core 3. The plurality of connecting slots 32 are filled with sound-absorbing cotton. A connecting mechanism 4 is provided on the outer wall of the main shaft 1 at both ends of the rotor core 3. The connecting mechanism 4 includes The main shaft 1 comprises a mounting ring 401 which is slidably sleeved on the outer wall of the main shaft 1, a limiting ring 402 which is fixed on the outer wall of one side of the mounting ring 401, a plurality of clamping rods 403 which are fixed on the outer wall of one side of the mounting ring 401, a plurality of connecting rods 404 which are fixed on the outer wall of one side of the mounting ring 401, and four blocking blocks 405 which are respectively fixed on the outer walls of one end of the plurality of connecting rods 404. A plurality of fixing grooves are opened on the outer walls of both sides of the rotor core 3, a plurality of clamping rods 403 are respectively inserted into the fixing grooves, a plurality of blocking blocks 405 are respectively inserted into the plurality of connecting grooves 32, and the main shaft 1 comprises a mounting ring 401 which is slidably sleeved on the outer wall of the main shaft 1, a limiting ring 402 which is fixed on the outer wall of one side of the mounting ring 401, a plurality of connecting rods 404 which are fixed on the outer wall of one side of the mounting ring 401, and four blocking blocks 405 which are respectively fixed on the outer walls of one end of the plurality of connecting rods 404. A plurality of slots 5 are provided on the outer wall of one end of the shaft 1, and a heat dissipation mechanism 6 is provided in each of the slots 5. The heat dissipation mechanism 6 includes an insert 601 and a fan blade 602. The insert 601 is inserted into the slot 5, and one end of the insert 601 abuts against the inner wall of the limit ring 402. A fixing ring 7 is sleeved on the outer wall of one end of the main shaft 1, and one side of the fixing ring 7 abuts against the outer wall of the bearing 2. One end of the insert 601 abuts against the inner wall of the fixing ring 7. A plurality of stator slots 81 are provided on the outer wall of one side of the stator core 8, and mounting slots 82 are evenly distributed on the outer wall of one side of the stator core 8. , sound insulation felts are inserted into several mounting grooves 82, and a noise reduction mechanism 9 is provided on the outer wall of one end of the main shaft 1. The noise reduction mechanism 9 includes a mounting cover 901 sleeved on the outer wall of one end of the main shaft 1, a first sound insulation cover 902 fixed on the inner wall of one side of the mounting cover 901, and a second sound insulation cover 903 fixed on the inner wall of one side of the mounting cover 901. A fastening bolt is screwed on the inner wall of the mounting cover 901, and the fastening bolt is screwed on the outer wall of one end of the main shaft 1. Sound insulation cotton is bonded to the inner wall of the mounting cover 901, the outer wall of the first sound insulation cover 902, and the outer wall of the second sound insulation cover 903.

[0031] The specially designed rotor slots 31 and stator slots 81 cooperate with each other to prevent resonance between the stator core 8 and the rotor core 3, thereby reducing resonance noise. At the same time, sound-absorbing cotton is arranged in the rotor core 3, and sound insulation felt is arranged in the stator core 8 to further reduce the noise generated during the operation of the asynchronous motor. When part of the noise is transmitted in the motor, it hits the outer walls of the mounting cover 901, the first sound insulation cover 902 and the second sound insulation cover 903, causing the noise to be refracted, thereby reducing the noise intensity.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0034] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A motor stator and rotor with noise reduction function, comprising a main shaft (1), a rotor core (3) and a stator core (8), characterized in that: A rotor slot (31) is formed on the outer wall of one side of the rotor core (3); The main shaft (1) is provided with a connection mechanism (4) on the outer wall at both ends of the rotor core (3), and the connection mechanism (4) comprises a mounting ring (401) slidably mounted on the outer wall of the main shaft (1), a limit ring (402) fixedly mounted on the outer wall of one side of the mounting ring (401), a plurality of clamping rods (403) fixedly mounted on the outer wall of one side of the mounting ring (401), a plurality of connecting rods (404) fixedly mounted on the outer wall of one side of the mounting ring (401), and four blocking blocks (405) respectively fixedly mounted on the outer walls of one end of the plurality of connecting rods (404); A plurality of slots (5) are formed on the outer wall of one end of the main shaft (1), and a heat dissipation mechanism (6) is provided in each of the plurality of slots (5), wherein the heat dissipation mechanism (6) comprises an insert block (601) and a fan blade (602); A plurality of stator slots (81) are formed on an outer wall of one side of the stator core (8); A noise reduction mechanism (9) is provided on the outer wall of one end of the main shaft (1), and the noise reduction mechanism (9) comprises a mounting cover (901) sleeved on the outer wall of one end of the main shaft (1), a first sound insulation cover (902) fixedly arranged on the inner wall of one side of the mounting cover (901), and a second sound insulation cover (903) fixedly arranged on the inner wall of one side of the mounting cover (901).

2. A motor stator and rotor with noise reduction function according to claim 1, characterized in that: The outer walls at both ends of the main shaft (1) are plugged with bearings (2), and the outer walls at both ends of the main shaft (1) close to the two bearings (2) are provided with clamping grooves, and the two clamping grooves are clamped with retaining springs.

3. The motor stator and rotor with noise reduction function according to claim 1, characterized in that: A plurality of connection grooves (32) are formed on the outer wall of one side of the rotor core (3), and the plurality of connection grooves (32) are filled with sound-absorbing cotton.

4. The motor stator and rotor with noise reduction function according to claim 1, characterized in that: A plurality of fixing grooves are provided on the outer walls of both sides of the rotor core (3), and a plurality of clamping rods (403) are respectively inserted into the fixing grooves, and a plurality of blocking blocks (405) are respectively inserted into a plurality of connecting grooves (32).

5. The motor stator and rotor with noise reduction function according to claim 1, characterized in that: The insert block (601) is inserted into the slot (5), and one end of the insert block (601) abuts against the inner wall of the limiting ring (402).

6. A motor stator and rotor with noise reduction function according to claim 2, characterized in that: A fixing ring (7) is sleeved on the outer wall of one end of the main shaft (1), and one side of the fixing ring (7) abuts against the outer wall of one side of the bearing (2), and one end of the insert block (601) abuts against the inner wall of the fixing ring (7).

7. The motor stator and rotor with noise reduction function according to claim 1, characterized in that: The outer wall of one side of the stator core (8) is provided with mounting grooves (82) distributed at equal distances, and sound insulation felts are inserted into a plurality of the mounting grooves (82).

8. The motor stator and rotor with noise reduction function according to claim 1, characterized in that: A fastening bolt is screwed onto the inner wall of the installation cover (901), and the fastening bolt is screwed onto the outer wall of one end of the main shaft (1). Sound insulation cotton is bonded onto the inner wall of the installation cover (901), the outer wall of the first sound insulation cover (902), and the outer wall of the second sound insulation cover (903).

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