Stator, motor, compressor and refrigeration equipment

Abstract

The stator is applied to the motor, the number of poles of the motor is P. The stator is characterized in that the stator comprises a stator yoke part and a plurality of stator tooth parts arranged on the inner side of the stator yoke part, a stator groove is formed between every two adjacent stator tooth parts, the number of the stator grooves is Z, Z / P is equal to 3 / 2, and Z / P is equal to 3 / 2. Lubricating grooves extending along the height direction of the stator are formed in the peripheral surface of the stator yoke part, the number of the lubricating grooves is N, and N is equal to P / 2. According to the technical scheme, the noise generated by the motor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator, a motor, a compressor, and a refrigeration device. Background Art

[0002] With the progress of society and the development of economy, people's living standards have been significantly improved. When consumers choose refrigeration equipment such as air conditioners and refrigerators, in addition to paying attention to the price, they also pay more attention to the noise problem of refrigeration equipment. The compressor is the core component of refrigeration equipment such as refrigerators and air conditioners, and the motor is the power output component of the compressor. The greater the vibration of the motor, the greater the noise of the motor. Therefore, optimizing the structure of the motor stator and reducing the working noise of the compressor are problems that technicians in this field need to solve at present. Summary of the invention

[0003] The main object of the present invention is to provide a stator aimed at reducing the noise emitted by the electric machine.

[0004] To achieve the above-mentioned purpose, the stator proposed in the present invention is applied to a motor, the number of poles of the motor is P, the stator includes a stator yoke, and a plurality of stator teeth arranged on the inner side of the stator yoke, a stator slot is formed between two adjacent stator teeth, the number of the stator slots is Z, Z / P=3 / 2, the outer peripheral surface of the stator yoke is provided with a lubrication groove extending along the height direction of the stator, the number of the lubrication grooves is N, N=P / 2.

[0005] Optionally, 2N<Z.

[0006] Optionally, P ranges from 2 to 12.

[0007] Optionally, P=10.

[0008] Optionally, Z ranges from 3 to 18.

[0009] Optionally, the plurality of lubrication grooves are evenly distributed in the circumferential direction of the stator yoke.

[0010] Optionally, the lubrication groove includes two sub-lubrication grooves and a connecting groove connecting the two sub-lubrication grooves, and the minimum distance from the bottom of the connecting groove to the stator axis is greater than the minimum distance from the bottom of the sub-lubrication groove to the axis.

[0011] The present invention also provides a motor, comprising the aforementioned stator.

[0012] The present invention also provides a compressor, comprising the motor as described above.

[0013] The present invention also provides a refrigeration device, which comprises the above-mentioned compressor.

[0014] In the technical solution of the present invention, the stator is applied to a motor, the number of poles of the motor is P, the stator includes a stator yoke and a plurality of stator teeth arranged on the inner side of the stator yoke, a stator slot is formed between two adjacent stator teeth, the number of the stator slots is Z, Z / P=3 / 2, the outer peripheral surface of the stator yoke is provided with a lubrication groove extending along the height direction of the stator, the number of the lubrication grooves is N, N=P / 2.

[0015] Please refer to Table 1, Table 2, and Table 3:

[0016]

[0017] Table 1

[0018]

[0019] Table 2

[0020]

[0021] Table 3

[0022] It can be understood that the motor is subjected to a relatively strong P / 2 order force, wherein the P / 2 order force has a first frequency. To avoid resonance of the motor, the motor needs to change the corresponding frequency under the P / 2 order mode to offset the first frequency. This solution makes Z / P=3 / 2 and N=P / 2, so that the corresponding frequency of the motor under the third order mode can offset the first frequency.

[0023] As can be seen from Table 1, when P=6, Z=9, and N=3, 5178-4634=544, which makes the motor stagger the amplitude of the first frequency in the third-order mode to a large extent, can avoid the resonance of the motor, and is beneficial to reduce the noise emitted by the motor. Compared with when N=9, 5025-5009=16, this solution makes the motor stagger the amplitude of the first frequency in the third-order mode to a large extent. In addition, although when N=6, 5337-4642=695, but N=6>N=3, that is, the number of lubrication grooves has increased, when the outer peripheral surface of the stator yoke remains unchanged, the smaller N is, the larger the cross-sectional area of ​​a single lubrication groove for the lubricating oil to flow through can be, which is more conducive to heat dissipation and lubrication of the stator.

[0024] From Table 2, it can be seen that when P=8, Z=12, and N=4, 5186-4514=672, which makes the motor stagger the amplitude of the first frequency in the fourth-order mode larger, which can avoid the resonance of the motor and help reduce the noise emitted by the motor. Compared with when N=6, 4406-4392=14, and compared with when N=12, 4622-4610=12, this scheme makes the motor stagger the amplitude of the first frequency in the fourth-order mode larger. In addition, although when N=8, 4352-3496=883, but N=8>N=4, that is, the number of lubrication grooves has increased, when the outer peripheral surface of the stator yoke remains unchanged, the smaller N is, the larger the cross-sectional area of ​​a single lubrication groove for the lubricating oil to flow through can be, which is more conducive to heat dissipation and lubrication of the stator.

[0025] From Table 3, it can be seen that when P=10, Z=15, and N=5, 9042-8254=788, which makes the motor stagger the amplitude of the first frequency in the fifth-order mode to a large extent, which can avoid the resonance of the motor and help reduce the noise emitted by the motor. Compared with when N=15, 9450-9442=8, this scheme makes the motor stagger the amplitude of the first frequency in the fifth-order mode to a large extent. In addition, although when N=10, 10468-8453=2015, but N=10>N=5, that is, the number of lubrication grooves has increased, when the outer peripheral surface of the stator yoke remains unchanged, the smaller N is, the larger the cross-sectional area of ​​a single lubrication groove for the lubricating oil to flow through can be, which is more conducive to heat dissipation and lubrication of the stator.

[0026] In this way, Z / P=3 / 2 and N=P / 2, which not only enables the motor to stagger the first frequency, but also the stagger amplitude is greater than 500HZ to avoid resonance of the motor and reduce the noise emitted by the motor, but also enables the cross-sectional area of ​​a single lubrication groove for the lubricating oil to flow through to be made larger, which is beneficial to heat dissipation and lubrication of the stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of an embodiment of the assembly of the stator and the housing of the present invention;

[0029] Figure 2 for Figure 1 A magnified view of the structure in the middle.

[0030] Description of Figure Numbers:

[0031] Label name Label name 100 stator 500 Lubrication groove 200 stator yoke 600 Sub lubrication groove 300 Stator teeth 700 Connecting groove 400 Stator slot 800 case

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or abutment, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] With the progress of society and the development of economy, people's living standards have been significantly improved. When consumers purchase refrigeration equipment such as air conditioners and refrigerators, in addition to paying attention to prices, they are also more concerned about the noise problem of refrigeration equipment. The compressor is the core component of refrigeration equipment such as refrigerators and air conditioners, and the motor is the power output component of the compressor. The greater the vibration of the motor, the greater the noise of the motor. The structure of the stator has a great influence on the noise of the motor. Therefore, optimizing the structure of the stator of the motor and reducing the working noise of the compressor are problems that technicians in this field currently need to solve. To this end, the present invention proposes a stator, which is intended to reduce the noise emitted by the motor.

[0038] Reference Figure 1 and Figure 2 In one embodiment of the present invention, the stator 100 is applied to a motor, the number of poles of the motor is P, the stator 100 includes a stator yoke 200, and a plurality of stator teeth 300 arranged on the inner side of the stator yoke 200, a stator slot 300 is formed between two adjacent stator teeth 300, the number of the stator slots 300 is Z, Z / P=3 / 2, the outer peripheral surface of the stator yoke 200 is provided with a lubrication groove 500 extending along the height direction of the stator 100, the number of the lubrication groove 500 is N, N=P / 2.

[0039] Please refer to Table 1, Table 2, and Table 3:

[0040]

[0041] Table 1

[0042]

[0043] Table 2

[0044]

[0045] Table 3

[0046] It can be understood that the motor is subjected to a relatively strong P / 2 order force, wherein the P / 2 order force has a first frequency. To avoid resonance of the motor, the motor needs to change the corresponding frequency under the P / 2 order mode to offset the first frequency. This solution makes Z / P=3 / 2 and N=P / 2, so that the corresponding frequency of the motor under the third order mode can offset the first frequency.

[0047] As can be seen from Table 1, when P=6, Z=9, and N=3, 5178-4634=544, which makes the motor stagger the amplitude of the first frequency in the third-order mode larger, which can avoid the resonance of the motor and help reduce the noise emitted by the motor. Compared with when N=9, 5025-5009=16, this solution makes the motor stagger the amplitude of the first frequency in the third-order mode larger. In addition, although when N=6, 5337-4642=695, but N=6>N=3, that is, the number of lubrication grooves 500 has increased, when the outer peripheral surface of the stator yoke 200 remains unchanged, the smaller N is, the larger the cross-sectional area of ​​a single lubrication groove 500 for the lubricating oil to flow through can be made, which is more conducive to heat dissipation and lubrication of the stator 100.

[0048] As can be seen from Table 2, when P=8, Z=12, and N=4, 5186-4514=672, so that the amplitude of the motor staggering the first frequency in the fourth-order mode is relatively large, which can avoid the resonance of the motor and is conducive to reducing the noise emitted by the motor. Compared with when N=6, 4406-4392=14, and compared with when N=12, 4622-4610=12, this scheme makes the amplitude of the motor staggering the first frequency in the fourth-order mode larger. In addition, although when N=8, 4352-3496=883, N=8>N=4, that is, the number of lubrication grooves 500 has increased, when the outer peripheral surface of the stator yoke 200 remains unchanged, the smaller N is, the larger the cross-sectional area of ​​a single lubrication groove 500 for the lubricating oil to flow through can be made, which is more conducive to heat dissipation and lubrication of the stator 100.

[0049] As can be seen from Table 3, when P=10, Z=15, and N=5, 9042-8254=788, which makes the motor stagger the amplitude of the first frequency in the fifth-order mode larger, which can avoid the resonance of the motor and help reduce the noise emitted by the motor. Compared with when N=15, 9450-9442=8, this solution makes the motor stagger the amplitude of the first frequency in the fifth-order mode larger. In addition, although when N=10, 10468-8453=2015, but N=10>N=5, that is, the number of lubrication grooves 500 has increased, when the outer peripheral surface of the stator yoke 200 remains unchanged, the smaller N is, the larger the cross-sectional area of ​​a single lubrication groove 500 for the lubricating oil to flow through can be made, which is more conducive to heat dissipation and lubrication of the stator 100.

[0050] In this way, Z / P=3 / 2 and N=P / 2, which not only enables the motor to stagger the first frequency, but also the stagger amplitude is greater than 500HZ to avoid resonance of the motor and reduce the noise emitted by the motor, but also enables the cross-sectional area of ​​a single lubrication groove 500 for the lubricating oil to flow through to be made larger, which is beneficial to heat dissipation and lubrication of the stator 100.

[0051] It should be noted that the outer circumference of the stator yoke 200 is used to abut against the inner circumference of the housing 800 of the motor.

[0052] Optionally, in one embodiment, 2N<Z. In this way, the number N is small, so that the cross-sectional area of ​​a single lubrication groove 500 through which lubrication oil flows can be made larger, which is beneficial to heat dissipation and lubrication of the stator 100.

[0053] There are many optional values ​​for P. Optionally, in one embodiment, the range of P is 2 to 12.

[0054] Further, in one embodiment, P=10.

[0055] There are many optional values ​​of Z. Optionally, in one embodiment, the range of Z is 3 to 18.

[0056] Optionally, in one embodiment, a plurality of lubrication grooves 500 are evenly distributed in the circumferential direction of the stator yoke 200. This is beneficial for even heat dissipation and lubrication of the stator 100.

[0057] There are many structural forms of the lubrication groove 500. Optionally, in one embodiment, the lubrication groove 500 includes two sub-lubrication grooves 600 and a connecting groove 700 connecting the two sub-lubrication grooves 600. The minimum distance from the bottom of the connecting groove 700 to the axis of the stator 100 is greater than the minimum distance from the bottom of the sub-lubrication groove 600 to the axis. However, the present design is not limited to this. In other embodiments, the lubrication groove 500 may also have other structural forms, which are not limited here.

[0058] The present invention also proposes a motor, which includes the aforementioned stator 100. The specific structure of the stator 100 refers to the above-mentioned embodiment. Since this motor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0059] The present invention also proposes a compressor, which includes the above-mentioned motor. The specific structure of the motor refers to the above-mentioned embodiment. Since the compressor adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0060] The present invention also proposes a refrigeration device, which includes the above-mentioned compressor. The specific structure of the compressor refers to the above-mentioned embodiment. Since the refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0061] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A stator, applied to a motor, wherein the number of poles of the motor is P, characterized in that: The stator includes a stator yoke and a plurality of stator teeth arranged on the inner side of the stator yoke. A stator slot is formed between two adjacent stator teeth. The number of the stator slots is Z, and Z / P=3 / 2. The outer peripheral surface of the stator yoke is provided with lubrication grooves extending along the height direction of the stator. The number of the lubrication grooves is N, and N=P / 2.

2. The stator according to claim 1, characterized in that 2N<Z.

3. The stator according to claim 1, characterized in that: The range of P is 2 to 12.

4. The stator according to claim 3, characterized in that P＝10。 5. The stator according to claim 1, characterized in that: The range of Z is 3 to 18.

6. The stator according to claim 1, characterized in that The plurality of lubrication grooves are evenly distributed in a circumferential direction of the stator yoke.

7. The stator according to claim 1, characterized in that The lubrication groove comprises two sub-lubrication grooves and a connecting groove connecting the two sub-lubrication grooves, and the minimum distance from the groove bottom of the connecting groove to the stator axis is greater than the minimum distance from the groove bottom of the sub-lubrication groove to the axis.

8. A motor, characterized in that: Comprising the stator according to any one of claims 1 to 7.

9. A compressor, characterized in that: Comprising the motor as claimed in claim 8.

10. A refrigeration device, characterized in that: Comprising the compressor of claim 9.

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