A stator, motor and compressor

Abstract

This utility model relates to the field of stator technology and discloses a stator including a stator body and stator teeth disposed on the inner periphery of the stator body, and a contact portion and a groove portion disposed on the outer periphery of the stator body. The arc length of the contact portion contacting the outer shell is SL1; the groove portion is located between two adjacent contact portions and is recessed from the outer periphery of the stator body in a direction away from the outer shell; on the outer periphery of the stator body, the arc length of the groove portion is SL2, and the recess depth of the groove portion is T1; the following relationship exists in the stator: 0.85≥(T1*SL1) / SL2≥0.65. The stator provided by this utility model optimizes the design of the stator's outer periphery structure, changes the air gap magnetic field distribution, and reduces the loss of harmonic magnetic fields, thereby achieving the effect of reducing electromagnetic noise.

Description

Technical Field

[0001] This utility model belongs to the technical field of stators, specifically relating to a stator, a motor, and a compressor. Background Technology

[0002] As the air conditioning industry increasingly demands energy conservation, environmental protection, and comfort, the efficiency and noise levels of permanent magnet compressor motors are constantly improving, posing increasingly severe challenges to motor design. How to effectively reduce motor noise and improve efficiency through design, while also addressing the impact of compressor oil circulation on overall system performance, has become a hot research topic in the industry.

[0003] During motor operation, low-order radial electromagnetic force is one of the main sources of noise. This electromagnetic force is primarily caused by the uneven distribution of the magnetic field inside the motor, causing noise to radiate outward from the stator / casing. In particular, as the operating speed of permanent magnet motors increases, their vibration and noise tend to increase significantly. In addition, there are also problems such as high harmonic losses and difficulty in oil return.

[0004] Therefore, in order to meet market demands, how to provide a compressor that can maintain low vibration and noise at high speeds is a problem that needs to be solved by those in the relevant technical field. Utility Model Content

[0005] To address the shortcomings of the prior art, this invention provides a stator that optimizes the design of the stator's outer peripheral region structure to reduce electromagnetic noise. In addition, this invention also provides a motor and a compressor incorporating this stator.

[0006] The technical effects to be achieved by this utility model are realized through the following technical aspects:

[0007] Firstly, this utility model provides a stator, including...

[0008] stator body,

[0009] Stator teeth are provided on the inner circumference of the stator body, and the stator teeth protrude toward the stator portion;

[0010] A contact portion is provided on the outer periphery of the stator body to contact the motor housing, and the arc length of the contact portion contacting the housing is SL1; and

[0011] A groove portion is located between two adjacent contact portions. The groove portion is recessed from the outer periphery of the stator body in a direction away from the outer shell. On the outer periphery of the stator body, the arc length of the groove portion is SL2 and the recess depth of the groove portion is T1.

[0012] The following relationship exists in the stator: 0.85≥(T1*SL1) / SL2≥0.65.

[0013] Preferably, the arc length SL1 of the contact portion in contact with the outer shell is 5mm-7mm, the arc length SL2 of the groove portion is 10.5-15.5mm, and the recess depth T1 of the groove portion is 1.5-2.25mm.

[0014] Preferably, the symmetry axis of the recessed portion of the groove coincides with the symmetry axis of the stator tooth, and the contact portion is located between adjacent stator teeth.

[0015] Preferably, the distance between the contact portion and the inner circumference of the stator body is Y1, the stator tooth includes a tooth body connected to the stator body and a tooth tip close to the interior of the stator, and the width of the tooth body is T2;

[0016] The stator contains the following relationship: 7mm ≥ Y1 ≥ 5mm, and Y1 / T2 ≥ 1.

[0017] Preferably, the stator body has N stator teeth, wherein N = 12 or N = 15.

[0018] Secondly, an electric motor is also provided, including a rotor and the aforementioned stator, wherein the stator teeth are arranged to form a mounting cavity, and the rotor is mounted in the mounting cavity.

[0019] Preferably, the rotor is provided with a plurality of V-shaped mounting grooves, each V-shaped mounting groove being formed by two connected sub-mounting grooves. Magnetic bodies are installed in the sub-mounting grooves. The included angle between the magnetic bodies in the V-shaped mounting grooves is M1, and the included angle of the rotor's pole arc is R1. The relationship is: 3.65≥M1 / R1≥2.65.

[0020] Preferably, in the V-shaped mounting groove, 100° ≥ M1 ≥ 90°.

[0021] Preferably, there is a gap between the rotor and the stator, the distance of the gap being G1, wherein 0.45≦G1<1.1.

[0022] Thirdly, a compressor is also provided, including an intake and exhaust system and any of the motors described above, wherein the intake and exhaust system is connected to the motor.

[0023] In summary, this utility model has at least the following advantages:

[0024] 1. The stator provided by this utility model optimizes the design of the stator's outer peripheral structure to reduce electromagnetic noise. Specifically, the stator's outer periphery has a contact portion that contacts the housing and a groove portion away from the housing, with the groove portion providing a flow channel for the refrigerant. This utility model's stator modifies the air gap magnetic field distribution by limiting the relationship between the arc length SL1 of the contact portion, the arc length SL2 of the groove portion, and the depth T1 of the groove portion, thereby reducing the loss of harmonic magnetic fields. This reduces noise generation in motors containing this stator during high-speed operation and also optimizes the refrigerant return oil channel, reducing the problem of difficult oil return.

[0025] 2. Based on the stator described above, the motor and compressor provided by this utility model improve motor efficiency while effectively suppressing low-order armature magnetomotive force harmonics on the stator windings when the motor is running at high speed, thereby improving high-frequency operating noise and oil return issues, and optimizing the overall performance of the machine. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the stator structure of Embodiment 1 of this utility model.

[0027] Figure 2 This is a schematic diagram of the motor structure of Embodiment 2 of this utility model.

[0028] Figure 3 for Figure 2 Enlarged structural diagram of part A.

[0029] Marked in the image:

[0030] 100, Motor; 200, Stator; 300, Rotor;

[0031] 10. Stator body; 11. Contact part; 12. Groove part; 20. Stator tooth; 21. Tooth head; 22. Tooth body; 30. V-shaped mounting groove; 31. First side groove; 32. Second side groove; 40. Gap. Detailed Implementation

[0032] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0033] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0036] Example 1:

[0037] Please see the appendix Figure 1 This utility model provides a stator 200, which reduces operating noise through structural optimization.

[0038] Specifically, the stator 200 includes a stator body 10 with an overall annular structure. The stator body 10 is provided with stator teeth 20, contact portions 11, and groove portions 12. The stator teeth 20 are located on the inner circumference of the stator body 10 and protrude radially towards the center of the stator body 10. The contact portions 11 are located on the outer circumference of the stator body 10 for contacting the housing of the motor 100 to ensure the stability of the stator 200 during operation and reduce noise caused by unstable operation of the stator 200. The contact portions 11 are arc-shaped and adapted to the housing, with an arc length SL1 for contact between the contact portion 11 and the housing.

[0039] The groove portion 12 and the contact portion 11 are alternately disposed on the outer periphery of the stator body 10, that is, the groove portion 12 is located between two adjacent contact portions 11 and is smoothly connected to the contact portion 11. The groove portion 12 is recessed radially from the outer periphery of the stator body 10 toward the direction away from the motor 100 housing. Along the outer periphery of the stator body 10, the arc length of the groove portion 12 is SL2, and the recess depth of the groove portion 12 relative to the outer periphery of the stator body 10 is T1. Specifically, the outer periphery of the stator body 10 can be understood as an annulus formed by all the contact portions 11, and the recess depth T1 of the groove portion 12 refers to the distance from the lowest point of the recess to the annulus.

[0040] In the stator 200, there exists a relationship: 0.85≥(T1*SL1) / SL2≥0.65, which allows the stator 200 to change the air gap magnetic field distribution by limiting the relationship between the arc length SL1 of the contact portion 11, the arc length SL2 of the groove portion 12, and the depth T1 of the groove portion 12, thereby reducing the loss of harmonic magnetic field. This enables the motor 100 containing the stator 200 to reduce noise generation when running at high speed, and also optimizes the oil return channel of the cold medium, reducing the problem of oil return difficulty.

[0041] To further demonstrate the noise reduction effect of stator 200, a stator with a mechanical frequency of 87Hz was used as the experimental object. The ratio of (T1*SL1) / SL2 of the stator was used as the variable. The noise generated by motors with stator 200 containing different ratios of size parameters was measured under the same conditions. The test results are shown in Table 1 below:

[0042] Table 1. Comparison of noise generated during operation of motors with stators of different dimensions.

[0043] Parameter ratio 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 Noise (dB) 66.7 66.5 66.0 65.0 65.0 65.0 65.0 65.0 66.0 66.5

[0044] As shown in Table 1, when 0.85≥(T1*SL1) / SL2≥0.65, the noise level generated by the motor containing the stator during operation is at a low value, and the stator has the most obvious effect on reducing noise.

[0045] Preferably, the arc length SL1 of the contact portion 11 in contact with the outer casing is 5mm-7mm to ensure a stable connection between the stator 200 and the outer casing, and to make the contact pressure distribution of the stator 200 on the outer casing more uniform, reducing the possibility of deformation or wear of the stator 200. Meanwhile, the arc length SL2 of the groove portion 12 is preferably in the range of 10.5-15.5mm, and the recess depth T1 of the groove portion 12 is preferably in the range of 1.5-2.25mm, to obtain a good structure for the stator 200.

[0046] It should be noted that the stator teeth 20, the groove portion 12, and the contact portion 11 are all axisymmetric structures arranged radially, and the stator teeth 20 are evenly arranged along the stator body 10. Preferably, the recessed axis of symmetry of the groove portion 12 coincides with the axis of symmetry of the stator teeth 20, and the axis of symmetry of the contact portion 11 coincides with the midline between adjacent stator teeth 20, so that the stator 200 as a whole has structural symmetry, which plays a positive role in reducing noise.

[0047] Furthermore, the distance between the contact portion 11 and the inner circumference of the stator body 10 is Y1. The stator tooth 20 includes a tooth body 22 connected to the stator body 10 and a tooth head 21 close to the interior of the stator 200, wherein the width of the tooth body 22 is T2. Preferably, there exists a relationship in the stator 200: 7mm≥Y1≥5mm, and Y1 / T2≥1, so as to further limit the size parameters of the stator tooth 20 and the stator body 10 of the stator 200, so as to obtain a stator 200 that operates well.

[0048] Furthermore, the stator body 10 is provided with a number of N stator teeth 20. The number of stator teeth 20 N is preferably 12 or 15. By limiting the number of stator teeth 20, the distribution of the air gap magnetic field is changed to make it close to a sinusoidal distribution, thereby reducing harmonics. At the same time, it also helps to reduce iron loss, reduce noise, and improve the performance of the motor 100.

[0049] Example 2:

[0050] Please refer to the reference. Figures 2 to 3 Based on the above embodiments, this embodiment provides a motor 100, which includes a rotor 300 and a stator 200. The stator teeth 20 of the stator 200 form a mounting cavity, and the rotor 300 is mounted in the mounting cavity.

[0051] The rotor 300 has a ring structure and is provided with several V-shaped mounting slots 30 distributed circumferentially. Each V-shaped mounting slot 30 is a V-shaped groove structure formed by connecting a first side slot 31 and a second side slot 32. Magnetic materials are installed in both the first side slot 31 and the second side slot 32. Within the same V-shaped mounting slot 30, the included angle between the magnetic materials is M1, and the included angle of the pole arc of the rotor 300 is R1. To reduce the fluctuation of electromagnetic torque during the operation of the motor 100, the relationship between the included angle M1 of the magnetic materials and the included angle R1 of the pole arc of the rotor 300 can be further optimized. Specifically, there is a relationship between the included angle M1 of the magnetic materials and the included angle R1 of the pole arc: 3.65 ≥ M1 / R1 ≥ 2.65, so that the motor 100 runs smoothly, thereby reducing noise generation.

[0052] Preferably, in the V-shaped mounting groove 30, 100°≥M1≥90°, so that the motor 100 has high power density and sterilization, while ensuring that the motor 100 runs smoothly and minimizes noise at high speed.

[0053] In further detail, the mounting cavity is formed by the teeth 21 of the stator teeth 20, and the rotor 300 is adapted to the shape of the mounting cavity. A gap 40 exists between the rotor 300 and the teeth 21 of the stator teeth 20, the distance of which is G1. Preferably, 0.45mm ≤ G1 < 1.1mm, so that there is a reasonable gap 40 between the rotor 300 and the stator 200, ensuring the rotor 300 can rotate freely while making the magnitude of the air gap harmonic magnetic field of the motor 100 reasonable and uniform, reducing stray losses, vibration, and noise of the motor 100.

[0054] In some embodiments, the motor 100 further includes a housing, in which a stator 200 and a rotor 300 are mounted, wherein the contact portion 11 of the stator 200 abuts against the inner sidewall of the housing.

[0055] Example 3:

[0056] This embodiment, based on the above embodiments, provides a compressor. The compressor includes an intake and exhaust system and the aforementioned motor 100, with the motor 100 connected to the intake and exhaust system. The intake and exhaust system may include an intake valve and an exhaust valve connected to the motor 100. The motor 100 serves as a power source and compresses and circulates air through the intake and exhaust valves to complete the compressor's function.

[0057] The above description is merely an example and illustration of the structure of this utility model, and while the description is quite specific and detailed, it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.

Claims

1. A stator, characterized in that, include stator body, Stator teeth are provided on the inner circumference of the stator body, and the stator teeth protrude toward the interior of the stator body; A contact portion is provided on the outer periphery of the stator body to contact the housing of the motor, and the arc length of the contact portion contacting the housing is SL1; and A groove portion is located between two adjacent contact portions. The groove portion is recessed from the outer periphery of the stator body in a direction away from the outer shell. On the outer periphery of the stator body, the arc length of the groove portion is SL2 and the recess depth of the groove portion is T1. The following relationship exists in the stator: 0.85≥(T1*SL1) / SL2≥0.

65.

2. The stator according to claim 1, characterized in that, The arc length SL1 of the contact portion in contact with the outer shell ranges from 5mm to 7mm, the arc length SL2 of the groove ranges from 10.5 to 15.5mm, and the recess depth T1 of the groove ranges from 1.5 to 2.25mm.

3. The stator according to claim 1, characterized in that, The symmetry axis of the recessed portion coincides with the symmetry axis of the stator tooth, and the symmetry axis of the contact portion coincides with the midline between the adjacent stator teeth.

4. The stator according to claim 3, characterized in that, The distance between the contact portion and the inner circumference of the stator body is Y1, the stator tooth includes a tooth body connected to the stator body and a tooth head close to the inside of the stator, and the width of the tooth body is T2. The stator contains the following relationship: 7mm ≥ Y1 ≥ 5mm, and Y1 / T2 ≥ 1.

5. The stator according to claim 4, characterized in that, The stator body has N stator teeth, wherein N = 12 or N = 15.

6. An electric motor, characterized in that, The device includes a rotor and a stator as described in any one of claims 1-5, wherein the stator teeth are arranged to form a mounting cavity, and the rotor is mounted in the mounting cavity.

7. The motor according to claim 6, characterized in that, The rotor is provided with a plurality of V-shaped mounting grooves, which are formed by connecting a first side groove and a second side groove. Magnetic bodies are installed in both the first side groove and the second side groove. In the V-shaped mounting groove, the included angle between the magnetic bodies is M1, and the included angle of the rotor's pole arc is R1. The relationship is: 3.65≥M1 / R1≥2.

65.

8. The motor according to claim 7, characterized in that, In the V-shaped mounting groove, 100°≥M1≥90°.

9. The motor according to claim 6, characterized in that, There is a gap between the rotor and the stator, and the distance of the gap is G1, wherein 0.45mm≦G1<1.1mm.

10. A compressor, characterized in that, It includes an intake and exhaust system and a motor as described in any one of claims 6-9, wherein the intake and exhaust system is connected to the motor.

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