Motor and compressor

Abstract

The present invention relates to a motor and a compressor. The motor includes: a housing, a motor shaft, a bearing bracket and a stator. The motor shaft is rotatably inserted into the housing, the bearing bracket is sleeved on the motor shaft, and the motor shaft is rotatably arranged relative to the bearing bracket, the end of the bearing bracket extending along the radial direction of the motor shaft is matched with the housing, and the inner wall of the bearing bracket is provided with a groove. The stator is located in the housing and is fixed to the housing, including a wire wrap portion protruding toward the groove along the central axis of the motor shaft, a first gap is provided between the wire wrap portion and the bottom wall of the groove, and a second gap is provided between the wire wrap portion and the plane where the open end of the groove is located. Compared with the prior art, by providing a groove on the bearing bracket, the electrical safety distance between the portion of the bearing bracket facing the wire wrap portion and the wire wrap portion is enlarged, thereby improving the electrical safety performance inside the motor, helping to avoid electrical safety hazards, and helping to achieve miniaturization and compactness of the motor.

Description

Technical Field

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

[0002] Under the condition of meeting the functional requirements, the smaller the size of the motor, the better. The internal structure of the existing motor, due to the large size of the stator structure, the distance between the motor stator and other components in a small space cannot ensure the electrical safety inside the motor, which is easy to cause safety hazards. Summary of the invention

[0003] The present invention aims at the problem that the internal structure of the existing motor cannot ensure electrical safety when miniaturized, and proposes a motor and a compressor, which have the technical effect of ensuring electrical safety when miniaturized.

[0004] A motor, comprising:

[0005] case;

[0006] A motor shaft is rotatably disposed in the housing;

[0007] A bearing bracket is sleeved on the motor shaft, and the motor shaft is rotatably arranged relative to the bearing bracket, an end portion of the bearing bracket extending along the radial direction of the motor shaft is matched with the housing, and a groove is provided on the inner wall of the bearing bracket; and,

[0008] The stator is arranged in the shell and fixedly connected to the shell, and includes a wire wrap portion protruding toward the groove, a first gap is formed between the wire wrap portion and the bottom wall of the groove, and a second gap is formed between the wire wrap portion and the plane where the opening end of the groove is located.

[0009] In one of the embodiments, a first insulating member is further included, which is sleeved in the groove. A third gap is provided between an end of the first insulating member facing away from the bottom wall of the groove and the wire wrap portion. The third gap is greater than or equal to the second gap and smaller than the first gap.

[0010] In one embodiment, the maximum vertical distance from the first insulating member to the central axis of the motor shaft is a first long distance D1, and the maximum vertical distance from the coil portion to the central axis of the motor shaft is a second long distance D2, satisfying: 1.2≤D1 / D2≤1.7.

[0011] In one embodiment, the minimum vertical distance from the first insulating member to the central axis of the motor shaft is a first close distance D3, and the minimum vertical distance from the coil portion to the central axis of the motor shaft is a second close distance D5, satisfying: 1.1≤D5 / D3≤1.3.

[0012] In one embodiment, the groove is an annular groove, and the first insulating member is an annular insulating member adapted to the annular groove.

[0013] In one embodiment, the peripheral wall of the motor shaft has a protruding comb-tooth portion, the comb-tooth portion extends in a ring shape along the circumference of the motor shaft, and is located on a side of the bearing bracket close to the wire wrap portion;

[0014] A sealing portion is sleeved on the comb tooth portion, and a fourth gap is defined between the sealing portion and the wire wrap portion. The maximum vertical distance from the sealing portion to the center axis of the motor shaft is a third long distance D6, and the minimum vertical distance from the sealing portion to the center axis of the motor shaft is a third short distance D7, satisfying: 1.2≤D6 / D7≤1.4.

[0015] In one embodiment, it further comprises a second insulating member, the second insulating member is sleeved on the sealing portion, and one end of the second insulating member, which is opposite to the other end along the axial direction of the motor shaft, abuts against the bearing bracket;

[0016] The second insulating member is located on a side of the coil portion close to the motor shaft and has a fifth gap between the second insulating member and the coil portion.

[0017] In one embodiment, the second insulating member includes a first sleeve portion and an abutment portion, one side of the first sleeve portion is sleeved on the sealing portion, and the abutment portion is convexly disposed on the other side of the sleeve portion away from the sealing portion;

[0018] One end of the abutting portion, which is opposite to each other along the central axis of the motor shaft, abuts against the bearing bracket, and the fifth gap is provided between the first sleeve portion and the coil wrap portion.

[0019] In one embodiment, the second insulating member further comprises a second sleeve portion, and the second sleeve portion is connected to an end of the first sleeve portion close to the bearing bracket;

[0020] The second sleeve portion has a first side and a second side opposite to each other along the radial direction of the motor shaft. The first side of the second sleeve portion is sleeved on the motor shaft, and the second side of the second sleeve portion abuts against the bearing bracket.

[0021] In one embodiment, the maximum vertical distance from the first sleeve portion to the central axis of the motor shaft is a fourth distance D8, which satisfies: 1.3≤D8 / D6≤1.7 <D5。

[0022] In one embodiment, the first sleeve portion is connected to the sealing portion via a connecting piece.

[0023] In one embodiment, the maximum vertical distance from the abutting portion to the central axis of the motor shaft is a fifth long distance D4, and 1.1≤D5 / D4≤1.3.

[0024] In the above motor, during actual operation, the rotor of the motor shaft rotates relative to the housing and the bearing bracket under the alternating magnetic field generated by the stator to achieve the conversion and output of electrical energy into mechanical energy. A groove is formed on the inner wall of the bearing bracket, and the wire wrap portion faces the groove. The gap between the portion of the bearing bracket facing the wire wrap portion is equal to the first gap between the wire wrap portion and the bottom wall of the groove, and the first gap is greater than the second gap between the wire wrap portion and the plane where the opening end of the groove is located, thereby expanding the facing distance between the wire wrap portion and the bearing bracket.

[0025] Compared with the prior art, the electrical safety distance between the part of the bearing bracket facing the wire wrap part and the wire wrap part is enlarged by the groove, thereby improving the electrical safety performance inside the motor, helping to avoid electrical safety hazards, and helping to achieve miniaturization and compactness of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a partial cross-sectional schematic diagram of a motor in one embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of a first insulating member in one embodiment of the present invention;

[0028] Figure 3 Schematic diagram of the structure of the second insulating member in one embodiment of the present invention.

[0029] Description of reference numerals:

[0030] Motor 1; housing 11; motor shaft 12; bearing bracket 13; stator 14; wire wrap portion 141; first insulating member 15; second insulating member 16; first sleeve portion 161; abutting portion 162; second sleeve portion 163; sealing portion 17; bearing 18. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[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", "center axis", "radial", "circumferential" and the like 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, and do not indicate or imply that the referred device or element 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] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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 or an indirect connection through an intermediate medium, 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.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0037] See also Figure 1 In one embodiment of the present invention, a motor 1 is provided, comprising a housing 11, a motor shaft 12, a bearing bracket 13 and a stator 14. The motor shaft 12 is rotatably inserted into the housing 11, the bearing bracket 13 is sleeved on the motor shaft 12, and the motor shaft 12 is rotatably arranged relative to the bearing bracket 13, the end of the bearing bracket 13 extending along the radial direction of the motor shaft 12 is matched with the housing 11, and the inner wall of the bearing bracket 13 has a groove. The stator 14 is located in the housing 11 and is fixed to the housing 11, and comprises a wire wrap portion 141 protruding toward the groove, a first gap is formed between the wire wrap portion 141 and the bottom wall of the groove, and a second gap is formed between the wire wrap portion 141 and the plane where the opening end of the groove is located.

[0038] In the above motor 1, during actual operation, the rotor of the motor shaft 12 rotates relative to the housing 11 and the bearing bracket 13 under the alternating magnetic field generated by the stator 14 to achieve the conversion and output of electrical energy into mechanical energy. A groove is formed on the inner wall of the bearing bracket 13, and the wire wrap portion 141 faces the groove. The gap between the portion of the bearing bracket 13 facing the wire wrap portion 141 is equal to the first gap between the wire wrap portion 141 and the bottom wall of the groove, and the first gap is greater than the second gap between the wire wrap portion 141 and the plane where the opening end of the groove is located, thereby expanding the facing distance between the wire wrap portion 141 and the bearing bracket 13.

[0039] Compared with the prior art, the electrical safety distance between the portion of the bearing bracket 13 facing the coil wrap portion 141 and the coil wrap portion 141 is enlarged by the groove, thereby improving the electrical safety performance inside the motor 1, helping to avoid electrical safety hazards, and helping to achieve miniaturization and compactness of the motor 1.

[0040] It can be understood that the second gap can be the gap between the wire wrap part 141 and the bearing bracket 13 in the existing structural solution, and the first gap is larger than the second gap, thereby achieving the electrical distance between the wire wrap part 141 and the bearing bracket 13.

[0041] It should be noted that the coil wrap portion 141 of the stator 14 is the end portion of the coil winding on the stator 14 located in a cavity surrounded by the bearing bracket 13 , the motor shaft 12 , and the housing 11 .

[0042] Specifically in the embodiment, see Figure 1 The motor shaft 12 includes a shaft body and a shoulder radially protruding from the shaft body, the stator 14 is arranged relative to the shoulder, the bearing bracket 13 is sleeved on the shaft body, and there is a cavity between the bearing bracket 13 and the shoulder, and the wire wrap 141 of the stator 14 is suspended in the cavity. At this time, there is a spacing between the wire wrap 141 and the shaft body and the bearing bracket 13 to ensure a certain electrical safety distance.

[0043] It can be understood that the motor 1 further includes a bearing 18, which is sleeved on the motor shaft 12, and the bearing bracket 13 is sleeved on the bearing 18. During actual operation, the motor shaft 12 is rotatably disposed in the housing 11 through the bearing 18 and can rotate relative to the bearing bracket 13.

[0044] In some embodiments, see Figure 1 The motor 1 also includes a first insulating member 15, which is sleeved in the groove. There is a third gap between the end of the first insulating member 15 that is away from the bottom wall of the groove and the coil portion 141, and the third gap is greater than or equal to the second gap and smaller than the first gap.

[0045] During actual operation, the first insulating member 15 is sleeved in the groove of the bearing bracket 13. The first insulating member 15 strengthens the structure of the bearing bracket 13 to ensure the structural stability of the motor 1 during operation. At the same time, the first insulating member 15 ensures the electrical safety distance between the bearing bracket 13 and the coil wrap 141.

[0046] The first insulating member 15 can be installed in the groove by heat-installation, that is, after the bearing bracket 13 is heated and expanded, the first insulating member 15 is installed in the groove. In this way, the bearing bracket 13 can be firmly connected with the first insulating member 15 after cooling and shrinking.

[0047] The first insulating member 15 may be made of bakelite, which has good insulation properties even under high voltage. Of course, the first insulating member 15 may also be other insulating members such as insulating ceramics. At this time, the first insulating member 15 can ensure the strength of the bearing bracket 13 and improve the electrical safety distance between the bearing bracket 13 and the wire wrap 141.

[0048] Further, see Figure 2 The groove is an annular groove, and the first insulating member 15 is an annular member adapted for the annular groove. In this way, after the shrink-fit cooling, the distance between the annular groove and the annular first insulating member 15 is good for the connection strength.

[0049] Furthermore, in order to ensure safety and reliability, a threaded through hole is added to the surface of the first insulating member 15, and correspondingly, a threaded hole is added to the bearing 18 support, and the first insulating member 15 is locked on the bearing 18 support through a threaded connector.

[0050] Preferably, there are multiple threaded through holes on the first insulating member 15 , and the multiple threaded through holes are evenly arranged along the circumferential direction of the first insulating member 15 .

[0051] Specifically in the embodiment, the maximum vertical distance from the first insulating member 15 to the center axis of the motor shaft 12 is a first long distance D1, and the maximum vertical distance from the coil portion 141 to the center axis of the motor shaft 12 is a second long distance D2. The first long distance D1 and the second long distance D2 satisfy: 1.2≤D1 / D2≤1.7.

[0052] At this time, the upper part of the bearing bracket 13 facing the wire wrap part 141 is the surface of the first insulating part 15. This is helpful to ensure that there is no electrical conduction between the wire wrap part 141 and the bearing bracket 13, especially when the motor 1 is a high-voltage motor 1, to avoid air conduction between the bearing bracket 13 and the wire wrap part 141, and to expand the range of the safe electrical safety distance between the wire wrap part 141 and the bearing bracket 13.

[0053] In practical applications, the ratio of the first long distance D1 to the second long distance D2 may be 1.4, 1.5, 1.6, etc.

[0054] Furthermore, the minimum vertical distance from the first insulating member 15 to the center axis of the motor shaft 12 is a first close distance D3, and the minimum vertical distance from the coil portion 141 to the center axis of the motor shaft 12 is a second close distance D5. The first close distance D3 and the second close distance D5 satisfy: 1.1≤D5 / D3≤1.3.

[0055] At this time, the lower parts of the bearing bracket 13 and the wire wrap part 141 facing each other are both surfaces of the first insulating member 15. This is helpful to ensure that no electrical conduction occurs between the wire wrap part 141 and the bearing bracket 13, especially when the motor 1 is a high-voltage motor 1, to avoid air conduction between the bearing bracket 13 and the wire wrap part 141, thereby expanding the range of the safe electrical safety distance between the wire wrap part 141 and the bearing bracket 13.

[0056] In practical applications, the ratio of the first long distance D5 to the second long distance D2 may be 1.2.

[0057] In some embodiments, see Figure 1 The peripheral wall of the motor shaft 12 has a protruding comb-tooth portion, which extends in a ring shape along the circumference of the motor shaft 12 and is located on the side of the bearing bracket 13 close to the wire wrap portion 141. A sealing portion 17 is sleeved on the comb-tooth portion, and a fourth gap is provided between the sealing portion 17 and the wire wrap portion 141. The maximum vertical distance from the sealing portion 17 to the central axis of the motor shaft 12 is a third long distance D6, and the minimum vertical distance from the sealing portion 17 to the central axis of the motor shaft 12 is a third short distance D7. The third long distance D6 and the third short distance D7 satisfy: 1.2≤D6 / D7≤1.4.

[0058] During actual operation, the sealing portion 17 seals the comb teeth portion. Since the third long distance D6 and the third short distance D7 satisfy: 1.2≤D6 / D7≤1.4, compared with the existing sealing portion 17 structure, the electrical safety distance between the sealing portion 17 and the coil portion 141 is expanded, thereby improving the electrical safety of the motor 1.

[0059] In practical applications, the ratio between the third long distance D6 and the third short distance D7 may be 1.3.

[0060] In some embodiments, see Figure 1 The motor 1 also includes a second insulating member 16, which is sleeved on the sealing portion 17. One end of the second insulating member 16 opposite to each other along the axial direction of the motor shaft 12 abuts against the bearing bracket 13. The second insulating member 16 is located on a side of the coil portion 141 close to the motor shaft 12, and has a fifth gap between the second insulating member 16 and the coil portion 141.

[0061] In this way, the sealing part 17 is connected to the bearing bracket 13 through the second insulating part 16, which improves the strength of the sealing part 17. At the same time, the second insulating part 16 can also ensure the electrical safety distance between the sealing parts 17; at the same time, the second insulating part 16 abuts against the bearing bracket 13, and can also ensure the sealing of the cavity between the bearing bracket 13, the motor shaft 12, and the housing 11, thereby ensuring the safety of the operation of the motor 1.

[0062] The second insulating member 16 may be made of bakelite, which has good insulation properties even under high voltage. Of course, the second insulating member 16 may also be other insulating members such as insulating ceramics. In this case, the second insulating member 16 can ensure the connection strength of the sealing portion 17 and improve the electrical safety distance between the sealing portion 17 and the wire wrap portion 141.

[0063] Specifically in the embodiment, see Figure 3 The second insulating member 16 includes a first sleeve portion 161 and a butting portion 162. One side of the first sleeve portion 161 is sleeved on the sealing portion 17, and the butting portion 162 is protruded on the other side of the sleeve portion away from the sealing portion 17. One end of the butting portion 162 opposite to each other along the central axis of the motor shaft 12 abuts against the bearing bracket 13, and the above-mentioned fifth gap is provided between the first sleeve portion 161 and the wire wrap portion 141.

[0064] At this time, the abutting portion 162 realizes the sealed connection between the second insulating member 16 and the bearing bracket 13 , and the first sleeve portion 161 realizes the connection between the second insulating member 16 and the sealing portion 17 .

[0065] It should be noted that the axial width of the abutting portion 162 along the motor shaft 12 is smaller than the axial width of the first sleeve portion 161 along the motor shaft 12, and there is a gap between the other end of the abutting portion 162 along the central axis of the motor shaft 12 and the wire wrap portion 141. At this time, while ensuring the connection reliability between the abutting portion 162 and the bearing bracket 13, the electrical safety distance between the first sleeve portion 161 and the wire wrap portion 141 can also be ensured.

[0066] Preferably, the maximum vertical distance between the abutment portion 162 and the central axis of the motor shaft 12 is the fifth distance D4, 1.1≤D5 / D4≤1.3. At this time, there is a large abutment area between the abutment portion 162 and the bearing bracket 13, which helps to ensure the abutment strength between the abutment portion 162 and the bearing bracket 13 and improve the operating reliability of the motor 1.

[0067] Furthermore, D4 ​​is equal to D3, that is, the end of the abutment portion 162 extending radially along the motor shaft 12 is flush with the plane where the point of the first insulating member 15 with the minimum vertical distance from the motor shaft 12 is located, so as to avoid the abutment portion 162 appearing between the first insulating member 15 and the coil portion 141, thereby reducing electrical safety.

[0068] Furthermore, the second insulating member 16 further includes a second sleeve portion 163, which is connected to one end of the first sleeve portion 161 close to the bearing bracket 13. The second sleeve portion 163 has a first side and a second side opposite to each other along the radial direction of the motor shaft 12, the first side of the second sleeve portion 163 is sleeved on the motor shaft 12, and the second side of the second sleeve portion 163 abuts against the bearing bracket 13.

[0069] In this way, the second sleeve portion 163 and the abutting portion 162 abut against the bearing bracket 13 from two intersecting directions respectively, thereby strengthening the abutting strength between the second insulating member 16 and the bearing bracket 13; at the same time, the motor shaft 12 is sleeved by the second sleeve portion 163, and the second sleeve portion 163 is connected to the first sleeve portion 161, thereby improving the connection stability between the first sleeve portion 161 and the sealing portion 17.

[0070] Preferably, the first sleeve portion 161 , the second sleeve portion 163 and the abutting portion 162 are integrally formed.

[0071] Furthermore, the maximum vertical distance from the first sleeve portion 161 to the central axis of the motor shaft 12 is a fourth distance D8, and the fourth distance D8 and the third distance D6 satisfy: 1.3≤D8 / D6≤1.7 <D5。

[0072] At this time, the connection stability of the sealing portion 17 can be ensured, and a certain electrical safety distance can be ensured between the sealing portion 17 and the wire wrap portion 141 .

[0073] In practical applications, the ratio of the fourth distance D8 to the third long distance D6 may be 1.4, 1.5 or 1.6.

[0074] Furthermore, in order to improve the connection strength between the second insulating member 16 and the sealing member, the first sleeve portion 161 and the sealing member 17 are connected via a connecting member.

[0075] Preferably, the first sleeve portion 161 and the sealing portion 17 are provided with matching threaded holes, and the threaded connector connects the first sleeve portion 161 and the sealing portion 17 when passing through the threaded holes.

[0076] The motor 1 provided in the embodiment of the present invention has at least the following beneficial effects:

[0077] 1) By providing a groove on the bearing bracket 13, the electrical safety distance between the portion of the bearing bracket 13 facing the wire wrap portion 141 and the wire wrap portion 141 is enlarged, thereby improving the electrical safety performance inside the motor 1, helping to avoid electrical safety hazards, and helping to achieve miniaturization and compactness of the motor 1.

[0078] 2) The first insulating member 15 is arranged in the groove, which not only strengthens the structure of the bearing bracket 13 and ensures the structural stability of the motor 1 during operation, but also ensures the electrical safety distance between the bearing bracket 13 and the coil portion 141 through the first insulating member 15;

[0079] 3) Compared with the prior art, the radial dimension of the sealing portion 17 is reduced, and the electrical safety distance between the sealing portion 17 and the wire wrap portion 141 is enlarged.

[0080] 4) The second insulating member 16 is provided, which not only enhances the connection strength of the sealing portion 17 and ensures the sealing of the cavity, but also ensures the electrical safety distance between the sealing portion 17 and the wire wrap portion 141 .

[0081] 5) Particularly suitable for application in high voltage motors 1 (voltage greater than 1000V).

[0082] In addition, an embodiment of the present invention further provides a compressor, comprising the motor 1 provided in any of the above embodiments. Since the compressor comprises the above motor 1, it has all the beneficial effects of the above motor 1, which will not be described in detail here.

[0083] The compressor may be a centrifugal compressor.

[0084] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A motor, characterized in that: include: Housing (11); A motor shaft (12) is rotatably disposed in the housing (11); A bearing bracket (13) is sleeved on the motor shaft (12), and the motor shaft (12) is rotatably arranged relative to the bearing bracket (13); an end portion of the bearing bracket (13) extending along the radial direction of the motor shaft (12) is matched with the housing (11), and a groove is provided on the inner wall of the bearing bracket (13); A stator (14) is disposed in the housing (11) and fixedly connected to the housing (11), comprising a wire wrap portion (141) protruding toward the groove, a first gap being formed between the wire wrap portion (141) and a bottom wall of the groove, and a second gap being formed between the wire wrap portion (141) and a plane where an opening end of the groove is located; A first insulating member (15), wherein the first insulating member (15) is sleeved in the groove, and a third gap is provided between an end of the first insulating member (15) away from the bottom wall of the groove and the wire wrap portion (141), wherein the third gap is greater than or equal to the second gap and smaller than the first gap.

2. The motor according to claim 1, characterized in that The maximum vertical distance from the first insulating member (15) to the central axis of the motor shaft (12) is a first long distance D1, and the maximum vertical distance from the coil portion (141) to the central axis of the motor shaft (12) is a second long distance D2, satisfying: 1.2≤D1 / D2≤1.

7.

3. The motor according to claim 2, characterized in that The minimum vertical distance from the first insulating member (15) to the central axis of the motor shaft (12) is a first close distance D3, and the minimum vertical distance from the coil portion (141) to the central axis of the motor shaft (12) is a second close distance D5, satisfying: 1.1≤D5 / D3≤1.

3.

4. The motor according to claim 1, characterized in that The groove is an annular groove, and the first insulating member (15) is an annular insulating member adapted to the annular groove.

5. The electric machine according to any one of claims 1 to 4, characterized in that The peripheral wall of the motor shaft (12) has a protruding comb-tooth portion, the comb-tooth portion extends in a ring shape along the circumference of the motor shaft (12) and is located on a side of the bearing bracket (13) close to the wire wrap portion (141); A sealing portion (17) is sleeved on the comb tooth portion, a fourth gap is provided between the sealing portion (17) and the wire wrap portion (141), a maximum vertical distance from the sealing portion (17) to the central axis of the motor shaft (12) is a third long distance D6, and a minimum vertical distance from the sealing portion (17) to the central axis of the motor shaft (12) is a third short distance D7, satisfying the following: 1.2≤D6 / D7≤1.

4.

6. The motor according to claim 5, characterized in that It also includes a second insulating member (16), the second insulating member (16) being sleeved on the sealing portion (17), and one end of the second insulating member (16) being opposite to each other along the axial direction of the motor shaft (12) being in contact with the bearing bracket (13); The second insulating member (16) is located on a side of the coil portion (141) close to the motor shaft (12), and has a fifth gap between the second insulating member and the coil portion (141).

7. The motor according to claim 6, characterized in that The second insulating member (16) comprises a first sleeve portion (161) and an abutment portion (162), one side of the first sleeve portion (161) being sleeved on the sealing portion (17), and the abutment portion (162) being protrudingly arranged on the other side of the first sleeve portion (161) facing away from the sealing portion (17); One of the two opposite ends of the abutment portion (162) along the central axis of the motor shaft (12) abuts against the bearing bracket (13), and the fifth gap is provided between the first sleeve portion (161) and the wire wrap portion (141).

8. The motor according to claim 7, characterized in that The second insulating member (16) further comprises a second sleeve connection portion (163), wherein the second sleeve connection portion (163) is connected to an end of the first sleeve connection portion (161) close to the bearing support (13); The second sleeve portion (163) has a first side and a second side opposite to each other along the radial direction of the motor shaft (12); the first side of the second sleeve portion (163) is sleeved on the motor shaft (12), and the second side of the second sleeve portion (163) abuts against the bearing bracket (13).

9. The motor according to claim 7, characterized in that The maximum vertical distance from the first sleeve portion (161) to the central axis of the motor shaft (12) is a fourth long distance D8, and the minimum vertical distance from the wire wrap portion (141) to the central axis of the motor shaft (12) is a second short distance D5, satisfying: 1.3≤D8 / D6≤1.7 <D5。 10. The motor according to claim 7, characterized in that The first sleeve portion (161) is connected to the sealing portion (17) via a connecting piece.

11. The motor according to claim 7, characterized in that The maximum vertical distance from the abutment portion (162) to the central axis of the motor shaft (12) is the fifth long distance D4, and the minimum vertical distance from the coil portion (141) to the central axis of the motor shaft (12) is the second short distance D5, 1.1≤D5 / D4≤1.

3.

12. A compressor, characterized in that: The invention comprises an electric machine (1) as claimed in any one of claims 1 to 11.

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