A noise reduction stator, motor and compressor

Abstract

The utility model relates to the technical field of stator, concretely relates to a kind of noise reduction stator, motor and compressor;Wherein, noise reduction stator, including annular yoke and the alternate arrangement of continuation part and abutting portion on the outer periphery of annular yoke, abutting portion abuts to the inner side wall of shell;Continuation part is formed along the radial recess in the direction of departing from shell, and the corresponding central angle of continuation part is SA1;With the lowest point of continuation part recessing, the annular P formed by surrounding is reference, the distance of abutting portion to annular P is T1;Continuation part includes the first arc segment and second arc segment of connection, and the radius of first arc segment is RR1;The radius of second arc segment is RR2;The utility model limits the relationship between the corresponding central angle of continuation part in noise reduction nail, the distance of abutting portion to the lowest point of continuation part and the specific size between continuation part structure, to make noise reduction stator produce good effect in reducing electromagnetic noise.

Description

Technical Field

[0001] This utility model belongs to the field of stator technology, specifically relating to a noise-reducing stator, motor, and compressor. Background Technology

[0002] Compressors increase the pressure and temperature of gases through compression to achieve functions such as cooling and heating, and are therefore widely used in industrial production and household appliances. With the general improvement in living standards, there is a trend towards miniaturization and lower noise levels in household compressors to optimize the user experience.

[0003] However, miniaturization reduces the space available for intake noise reduction, which negatively impacts compressor noise reduction. This noise is particularly noticeable when the compressor is running at high speeds. Low-order radial electromagnetic forces are one of the main sources of noise during compressor operation. These forces are primarily caused by uneven magnetic field distribution within the motor, radiating noise outwards from the stator / casing through excitation.

[0004] Therefore, optimizing the compressor structure to reduce noise generated during high-speed operation is a current research hotspot. Utility Model Content

[0005] To address the shortcomings of the prior art, this invention provides a noise-reducing stator. By defining the relationship between the central angle of the connecting portion, the distance from the contact portion to the lowest point of the connecting portion, and the specific dimensions of the connecting portion structure, the invention achieves the effect of reducing 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 noise-reducing stator, including...

[0008] An annular yoke has alternating connecting portions and abutting portions on its outer periphery. The abutting portions abut against the inner sidewall of the housing. The connecting portions are radially recessed in a direction away from the housing, and the central angle of the connecting portions is SA1.

[0009] With the lowest point of the concave part of the connecting part forming an annular ring P as a reference, the distance from the abutting part to the annular ring P is T1;

[0010] The connecting portion includes a first arc segment and a second arc segment that are smoothly connected. The first arc segment is recessed radially toward the center of the annular yoke, and the radius of the first arc segment is RR1.

[0011] The second arc segment is located at both ends of the first arc segment and connects the first arc segment and the abutting part. The center of the second arc segment and the center of the first arc segment are located on both sides of the connecting part. The radius of the second arc segment is RR2.

[0012] In the noise reduction stator, the following relationships exist: 17°≥SA1, (T1*RR1) / RR2≥0.90.

[0013] Preferably, in the noise reduction stator, 5.5mm≥RR1≥3.5mm, 10mm≥RR2≥6mm, and 1.50mm≥T1≥2.25mm.

[0014] Preferably, the inner circumference of the annular yoke is provided with a plurality of radially protruding teeth, and stator grooves are formed between adjacent teeth. The distance between the abutting part and the inner circumference of the annular yoke is Y1. The teeth include tooth bodies connected to the annular yoke, and the width of the tooth body is T2.

[0015] The noise reduction stator contains the following relationship: 7mm ≥ Y1 ≥ 5mm, and Y1 / T2 ≥ 1.

[0016] Preferably, the annular yoke has N teeth, wherein N=12 or N=15.

[0017] Preferably, the axis of symmetry of the abutment portion coincides with the axis of symmetry of the stator slot, and the axis of symmetry of the connecting portion coincides with the axis of symmetry of the tooth portion.

[0018] Secondly, this utility model also provides an electric motor, including a rotor and the aforementioned noise-reducing stator, wherein an installation cavity is formed inside the noise-reducing stator, and the rotor is installed in the installation cavity.

[0019] Preferably, there is a gap between the rotor and the noise-reducing stator, the distance of the gap being G1, wherein 0.45mm≦G1<1.1mm.

[0020] 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. Magnets are installed in the sub-mounting grooves. The included angle between the magnets in the V-shaped mounting grooves is M1, and the included angle of the polar arc of the rotor is R1. The relationship is: 3.65≥M1 / R1≥2.65.

[0021] Preferably, in the V-shaped mounting groove, 100° ≥ M1 ≥ 90°.

[0022] The third aspect also provides a compressor, which includes an intake and exhaust system and the aforementioned motor, 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 noise-reducing stator provided by this utility model achieves the effect of reducing electromagnetic noise by limiting the structural and dimensional parameters of the connecting part and the abutment part. Specifically, this utility model limits the relationship between the radii of the first and second arc segments in the connecting part and the distance between the abutment part and the protrusion of the connecting part, which makes the air gap magnetic field distribution more uniform, reduces the amplitude of the radial electromagnetic force between the stator and the rotor, and thus reduces the vibration and noise of the stator. In addition, limiting the stator structure also helps to solve the problem of difficult oil return, thereby helping to improve the operating performance of the motor and compressor.

[0025] 2. The motor and compressor provided by this utility model achieve performance improvements based on the aforementioned stator structure. On the one hand, the noise generated by the motor and compressor during high-frequency operation is reduced; on the other hand, the oil return problem is also properly addressed, thereby optimizing the overall performance of the machine in multiple ways. Attached Figure Description

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

[0027] Figure 2 for Figure 1 Enlarged structural diagram of part A.

[0028] Figure 3 This is a schematic diagram of the motor structure of Embodiment 2 of this utility model.

[0029] Figure 4 This is a data curve of the noise value measured experimentally under different ratios of (T1*RR1) / RR2 and corresponding ratios of the noise-reducing stator in Embodiment 1 of this utility model, under the conditions of mechanical frequency of 87Hz and 17°≥SA1.

[0030] Marked in the image:

[0031] 100. Noise-reducing stator; 200. Rotor; 300. Motor;

[0032] 10. Annular yoke; 11. Connecting part; 111. First circular arc segment; 112. Second circular arc segment; 12. Abutting part;

[0033] 20. Tooth part; 21. Tooth body; 22. Tooth tip;

[0034] 30. Installation cavity;

[0035] 40. Stator slots;

[0036] 50. Gap;

[0037] 60. V-shaped mounting groove; 61. Sub-mounting groove. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] Example 1:

[0043] Please see the appendix Figure 1 This utility model provides a noise-reducing stator 100, which reduces operating noise by defining the relationship between the structure and dimensional parameters on the outer periphery.

[0044] Specifically, the noise-reducing stator 100 is installed inside the housing of the motor 300. The noise-reducing stator 100 includes an annular yoke 10 and connecting portions 11 and abutting portions 12 alternately arranged on the outer periphery of the annular yoke 10. The abutting portion 12 of the noise-reducing stator 100 is adapted to the inner wall of the housing. When the noise-reducing stator 100 is installed inside the housing, the abutting portion 12 abuts against the inner wall of the housing, maintaining a relatively stable structure for the stator during operation and helping to reduce noise generation.

[0045] The connecting portion 11 is formed by a radial indentation in the direction away from the shell, and the central angle corresponding to the connecting portion 11 is SA1. The connecting portion 11 and the abutting portion 12 are smoothly connected. The point where the connecting portion 11 and the abutting portion 12 connect on the outer periphery of the annular yoke 10 is point S. The central angle corresponding to the connecting portion 11 is the included angle formed between the two radii passing through the two endpoints S of the same connecting portion 11 within the circle containing the outer periphery of the annular yoke 10.

[0046] In addition, the connecting portion 11 includes a first arc segment 111 and a second arc segment 112 that are smoothly connected. The second arc segment 112 is located at both ends of the first arc segment 111 and is used to connect the first arc segment 111 and the adjacent abutment portion 12.

[0047] Specifically, the first arc segment 111 is formed radially and recessed towards the center of the annular yoke 10, with a radius of RR1. The center of the second arc segment 112 is located on opposite sides of the center of the first arc segment 111, meaning the opening direction of the second arc segment 112 is opposite to that of the first arc segment 111, and its radius is RR2. Simultaneously, using the annular ring P formed around the lowest point of the recess in the connecting portion 11 as a reference, the distance from the abutment portion 12 to the annular ring P is T1, meaning the maximum distance of the abutment portion 12 relative to the lowest point of the connecting portion 11 is T1.

[0048] In the noise-reducing stator 100 provided in this embodiment, the relationships 17°≥SA1 and (T1*RR1) / RR2≥0.90 exist to optimize the structure of the noise-reducing stator 100, enabling it to effectively reduce noise and solve oil return difficulties. The abutment portion 12 abuts against the housing, while the connecting portion 11 is away from the housing and forms a return oil channel for the cold medium. Therefore, by defining the relationship between the radii of the first arc segment 111 and the second arc segment 112 of the connecting portion 11 and the dimensional parameters of the abutment portion 12, the noise-reducing stator 100 not only ensures a uniform air gap magnetic field distribution during the operation of the motor 300 containing the stator, reducing the amplitude of the radial electromagnetic force between the stator and the rotor 200, thereby reducing stator vibration and noise, but also optimizes the oil return channel between the stator and the housing, thus improving operating performance.

[0049] The following data demonstrates the positive effect of the noise-reducing stator 100 on reducing the noise generated by the motor during high-speed operation. Specifically, using a noise-reducing stator 100 with a mechanical frequency of 87Hz as the experimental object, and assuming that the noise-reducing stator 100 satisfies 17°≥SA1, the noise generated by the motor containing the noise-reducing stator 100 during operation was measured using the ratio (T1*RR1) / RR2 as a variable. The noise data obtained are as follows: Figure 4 As shown. By Figure 4 It can be seen that when (T1*RR1) / RR2≥0.90, the noise generated by the motor is significantly improved.

[0050] To meet the size requirements of commonly used stators on the market, and also to achieve good noise reduction, the structural parameters of the noise-reducing stator 100 are preferably satisfied as follows: 5.5mm≥RR1≥3.5mm, 10mm≥RR2≥6mm, 1.50mm≥T1≥2.25mm.

[0051] Furthermore, the inner circumference of the annular yoke 10 is provided with a plurality of radially protruding teeth 20, and a stator slot 40 is formed between adjacent teeth 20 and the annular yoke 10. The distance between the abutment portion 12 and the inner circumference of the annular yoke 10 is Y1. Meanwhile, each tooth 20 includes a tooth body 21 and a tooth head 22. The tooth body 21 is connected to the tooth head 22 and the annular yoke 10, and the width of the tooth body 21 is T1, that is, the width of the tooth body 21 in the direction perpendicular to the radial direction is T1. In the noise-reducing stator 100, there exists the relationship: 7mm ≥ Y1 ≥ 5mm, and Y1 / T1 ≥ 1. By limiting the relationship between the width of the tooth 20 and the width of the annular yoke 10, the stator can achieve a reasonable magnetic flux and balanced electromagnetic force during operation, thereby making the electromagnetic force distribution more uniform, reducing vibration and noise, and improving the smoothness and efficiency of the motor 300 operation.

[0052] The number of teeth 20 on the annular yoke 10 is N. Preferably, the number of teeth 20, N, is 12 or 15 to obtain a noise-reducing stator 100 with further optimized structure. Based on the above, the number of teeth 20 affects the spacing between the teeth 20 on the annular yoke 10. Therefore, by limiting the number of teeth 20, the distribution of the air gap magnetic field can be changed to make it closer to a sinusoidal distribution, reducing harmonics, and also helping to reduce iron losses, which in turn helps to reduce noise and improve the performance of the motor 300.

[0053] Furthermore, in this embodiment, the toothed portion 20, the connecting portion 11, and the abutting portion 12 are all axisymmetric structures extending radially along the annular yoke 10, and their respective axes of symmetry are parallel to their respective extension directions. The toothed portions 20 are evenly distributed along the inner circumference of the annular yoke 10. The axis of symmetry of the abutting portion 12 coincides with the axis of symmetry of the corresponding stator slot 40, and the axis of symmetry of the connecting portion 11 coincides with the axis of symmetry of the toothed portion 20, thus ensuring the overall symmetry of the noise-reducing stator 100, resulting in smooth operation, uniform force distribution, and balanced performance.

[0054] Preferably, the arc length SL1 of the contact between the abutment portion 12 and the housing is 5mm-7mm to ensure a stable connection between the noise-reducing stator 100 and the housing, and to make the contact pressure distribution of the noise-reducing stator 100 on the housing more uniform, reducing the possibility of deformation or wear of the noise-reducing stator 100. The contact arc length SL1 of the abutment portion 12 can be understood as the length of the arc between the two end points A of the abutment portion 12 on the outer periphery of the annular yoke 10.

[0055] Example 2:

[0056] Please refer to the reference. Figures 2 to 3 Based on the above embodiments, this embodiment provides a motor 300, which includes a rotor 200 and a noise-reducing stator 100. The noise-reducing stator 100 has an internal mounting cavity 30, and the rotor 200 is mounted within the mounting cavity 30.

[0057] Specifically, the mounting cavity 30 is formed by the tooth tips 22 of the toothed portion 20. The rotor 200 is an annular structure adapted to the mounting cavity 30, and a gap 50 is maintained between the rotor 200 and the noise-reducing stator 100. This gap 50 is G1 along the radial direction of the annular yoke 10. Preferably, 0.45mm ≤ G1 < 1.1mm, so that there is a reasonable gap 50 between the rotor 200 and the noise-reducing stator 100, ensuring that the rotor 200 can rotate freely while making the magnitude of the air gap harmonic magnetic field of the motor 300 reasonable and uniform, reducing stray losses, vibration and noise of the motor 300.

[0058] Furthermore, the rotor 200 is provided with several V-shaped mounting slots 60 distributed circumferentially. Each V-shaped mounting slot 60 is a slot structure formed by two sub-mounting slots 61 connected in a V-shape, and magnets are installed in both sub-mounting slots 61. Within the same V-shaped mounting slot 60, the included angle between the magnets is M1, and the included angle of the pole arc of the rotor 200 is R1. To reduce the fluctuation of electromagnetic torque during the operation of the motor 300, the relationship between the magnet included angle M1 and the included angle of the pole arc R1 of the rotor 200 can be further optimized. Specifically, there is a relationship between the magnet included angle M1 and the included angle of the pole arc R1: 3.65 ≥ M1 / R1 ≥ 2.65, so that the motor 300 runs smoothly, thereby reducing noise generation.

[0059] Preferably, in the V-shaped mounting groove 60, 100°≥M1≥90°, so that the motor 300 has high power density and sterilization, while ensuring that the motor 300 runs smoothly and minimizes noise at high speed.

[0060] In some embodiments, the motor 300 further includes a housing, in which a noise-reducing stator 100 and a rotor 200 are mounted, wherein the abutting portion 12 of the noise-reducing stator 100 abuts against the inner sidewall of the housing.

[0061] Example 3:

[0062] This embodiment, based on the above embodiments, provides a compressor. The compressor includes an intake and exhaust system and the aforementioned motor 300, with the motor 300 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 300. The motor 300 serves as a power source and compresses and circulates air through the intake and exhaust valves to complete the compressor's function.

[0063] 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 noise reducing stator for mounting within a housing of an electric machine, characterized by, include An annular yoke has alternating connecting portions and abutting portions on its outer periphery. The abutting portions abut against the inner sidewall of the housing. The connecting portions are radially recessed in a direction away from the housing, and the central angle of the connecting portions is SA1. With the lowest point of the concave part of the connecting part forming an annular ring P as a reference, the distance from the abutting part to the annular ring P is T1; The connecting portion includes a first arc segment and a second arc segment that are smoothly connected. The first arc segment is recessed radially toward the center of the annular yoke, and the radius of the first arc segment is RR1. The second arc segment is located at both ends of the first arc segment and connects the first arc segment and the abutting part. The center of the second arc segment and the center of the first arc segment are located on both sides of the connecting part. The radius of the second arc segment is RR2. In the noise reduction stator, the following relationships exist: 17°≥SA1, (T1*RR1) / RR2≥0.

90.

2. The noise reducing stator of claim 1, wherein, In the noise reduction stator, 5.5mm≥RR1≥3.5mm, 10mm≥RR2≥6mm, and 1.50mm≥T1≥2.25mm.

3. The noise reducing stator of claim 1, wherein, The inner circumference of the annular yoke is provided with a plurality of radially protruding teeth, and a stator groove is formed between adjacent teeth and the annular yoke. The distance between the abutting part and the inner circumference of the annular yoke is Y1. The teeth include tooth bodies connected to the annular yoke, and the width of the tooth body is T2. The noise reduction stator contains the following relationship: 7mm ≥ Y1 ≥ 5mm, and Y1 / T2 ≥ 1.

4. The noise reducing stator of claim 3, wherein, The annular yoke has N teeth, where N = 12 or N = 15.

5. The noise reducing stator of claim 3, wherein, The axis of symmetry of the abutment portion coincides with the axis of symmetry of the corresponding stator slot, and the axis of symmetry of the connecting portion coincides with the axis of symmetry of the tooth portion.

6. An electric machine characterized by The device includes a rotor and a noise-reducing stator as described in any one of claims 1-5, wherein the noise-reducing stator has an internal mounting cavity, and the rotor is mounted in the mounting cavity.

7. The electric machine of claim 6, wherein, There is a gap between the rotor and the noise-reducing stator, and the distance of the gap is G1, wherein 0.45mm≦G1<1.1mm.

8. The electric machine of claim 6, wherein, The rotor is provided with several V-shaped mounting slots, each V-shaped mounting slot is formed by two connected sub-mounting slots, and a magnet is installed in each sub-mounting slot. The included angle between the magnets in the V-shaped mounting slot is M1, and the included angle of the rotor's polar arc is R1. The relationship is: 3.65≥M1 / R1≥2.

65.

9. The electric machine of claim 8, wherein, In the V-shaped mounting groove, 100°≥M1≥90°.

10. A compressor characterized by, 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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