Stator laminations, stators, motors, compressors and refrigeration equipment

Abstract

The utility model discloses a stator punching sheet, a stator, a motor, a compressor and a refrigeration device, and relates to the technical field of motors, wherein the stator punching sheet has a rotation center for the rotor to rotate, the stator punching sheet comprises a yoke and a plurality of teeth, the plurality of teeth are arranged on the inner periphery of the yoke, the plurality of teeth include a first tooth, the first tooth has a first center line extending to the rotation center, the stator punching sheet is provided with a first rivet hole for the first center line to pass through, the outer periphery of the yoke is provided with an oil return port, the oil return port comprises a first oil return notch arranged at intervals from the first rivet hole, and the first oil return notch avoids the first center line. The technical solution provided by the utility model aims to provide a possibility for both reducing the eddy current loss of the stator and avoiding the reduction of the structural strength of the stator.

Description

Technical Field

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

[0002] The motor includes a rotor and a stator used in conjunction with the rotor, and the stator includes a plurality of stator punching sheets, which are stacked and connected together by rivets. However, the eddy current loss of the stator is relatively high. In order to reduce the eddy current loss of the stator, the prior art adopts a solution of reducing the number of rivets, which, however, will reduce the structural strength of the stator. Utility Model Content

[0003] The main purpose of the utility model is to provide a stator punching sheet, a stator, a motor, a compressor and a refrigeration device, aiming to provide a possibility for reducing the eddy current loss of the stator and avoiding the reduction of the structural strength of the stator.

[0004] In order to achieve the above-mentioned purpose, the stator punching sheet proposed in the utility model has a rotation center for the rotor to rotate, and the stator punching sheet includes:

[0005] a yoke; and

[0006] A plurality of tooth portions are arranged on the inner periphery of the yoke portion, the plurality of tooth portions include a first tooth portion, the first tooth portion has a first center line extending to the rotation center, the stator punching sheet is provided with a first rivet hole for the first center line to pass through, the outer periphery of the yoke portion is provided with an oil return port, the oil return port includes a first oil return notch arranged at intervals from the first rivet hole, and the first oil return notch avoids the first center line.

[0007] In one embodiment, the oil return port includes two first oil return notches, and the two first oil return notches are respectively arranged on both sides of the corresponding first center line.

[0008] In one embodiment, a plurality of the first tooth portions are provided, a plurality of the oil return ports are provided, and one oil return port is provided corresponding to one first tooth portion.

[0009] In one embodiment, the first oil return notch has a first edge and a second edge connected to the first edge, the second edge is arranged between the first edge and the corresponding first center line, the outer periphery of the yoke is provided with a connecting edge connecting the two second edges, and the first edge is arranged in a straight line.

[0010] In one embodiment, the second side is arranged in a straight line.

[0011] In one embodiment, an included angle between the second side and the first side is A, and 120°≤A≤160°.

[0012] In one embodiment, the second side is arranged in an arc shape;

[0013] And / or, the maximum distance from the outer periphery of the yoke to the rotation center is R, the connecting edge is arranged in an arc shape, the center of the connecting edge is the rotation center, and the radius of the connecting edge is R;

[0014] And / or, the tooth portion has a tooth body connected to the yoke portion, and a tooth boot connected to the tooth body, the connection between the first side and the second side is a first connection, and the distance between the two first connections of the oil return port is greater than the width of the tooth body of the corresponding first tooth portion.

[0015] In one embodiment, the minimum distance between the first rivet hole and the connecting edge is y, and y≥2 mm.

[0016] In one embodiment, the plurality of tooth portions further include a plurality of second tooth portions, and the outer periphery of the yoke portion is further provided with a plurality of second oil return notches, one second oil return notch being provided corresponding to one second tooth portion, and the second tooth portion having a second center line extending to the rotation center, and the second center line passing through the corresponding second oil return notch.

[0017] The utility model also provides a stator, which comprises the above-mentioned stator punching sheet.

[0018] The utility model also provides a motor, which comprises the above-mentioned stator.

[0019] The utility model also provides a compressor, which comprises the above-mentioned motor.

[0020] The utility model also provides a refrigeration device, which comprises the above-mentioned compressor.

[0021] In the technical solution of the utility model, the first center line passes through the first rivet hole, the first oil return notch avoids the first center line, and is spaced apart from the first rivet hole, so that the position of the rivet hole can be far away from the rotation center, making it possible for the stator punching sheet to reduce the eddy current loss of the stator and avoid the reduction of the structural strength of the stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1A structural schematic diagram of a first embodiment of a stator punching sheet provided by the utility model;

[0024] Figure 2 for Figure 1 A partial enlarged view of the J in the middle;

[0025] Figure 3 A structural schematic diagram of a second embodiment of a stator punching sheet provided by the utility model;

[0026] Figure 4 for Figure 3 A partial enlarged view of point K in the middle.

[0027] Description of Figure Numbers:

[0028] 100, stator punching sheet; 110, rotation center; 200, yoke; 210, connecting edge; 220, oil return port; 230, first oil return notch; 231, first edge; 232, second edge; 240, second oil return notch; 250, positioning notch; 600, tooth; 610, tooth body; 620, tooth shoe; 630, first tooth; 640, second tooth; 650, third tooth; 710, first center line; 720, second center line; 730, third center line; 800, wire groove; 810, groove edge section; 910, first rivet hole; 920, second rivet hole.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications 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 indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, 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 limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy 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 this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] See also Figures 1 to 4 The utility model provides a stator. The stator includes a plurality of stator punching sheets 100 stacked together, and the plurality of stator punching sheets 100 of the stator are connected together by rivets. The stator is applied with the stator punching sheets 100 provided by the utility model.

[0034] The utility model provides a stator punching sheet 100. In one embodiment of the utility model, the stator punching sheet 100 has a rotation center 110 for the rotor to rotate. It can be understood that the rotation axis of the rotor passes through the rotation center 110. The stator punching sheet 100 includes a yoke 200 and a plurality of teeth 600. Among them, the plurality of teeth 600 are arranged on the inner periphery of the yoke 200. Specifically, the plurality of teeth 600 are arranged at intervals in the circumferential direction of the stator punching sheet 100, that is, in the direction around the rotation center 110. The yoke 200 and the two adjacent teeth 600 limit a wire gap, and the wire gap is used for the wire of the stator winding to pass through, and the wire gap is used to form the stator slot of the stator. For the stator, the plurality of wire gaps arranged relatively in the height direction of the stator limit the stator slot, and the stator slot is used for the stator winding to pass through. The stator punching sheet 100 is provided with a first rivet hole 910, and the first rivet hole 910 is used for the rivet buckle to pass through. The plurality of tooth portions 600 include a first tooth portion 630, the first tooth portion 630 having a first center line 710 extending to the rotation center 110, and the first center line 710 passes through the rivet. The outer periphery of the yoke 200 is provided with an oil return port 220, the oil return port 220 includes a first oil return notch 230 spaced apart from the first rivet hole 910, and the first oil return notch 230 is used to form a first oil return groove of the stator. For the stator, a plurality of first oil return notches 230 arranged relatively in the height direction of the stator limit the first oil return groove. The first oil return notch 230 avoids the first center line 710. In this way, the position of the first center line 710 will not be occupied by the first oil return notch 230, so that the rivet can be moved away from the rotation center 110 in the extension direction of the first center line 710. The farther the rivet is from the rotation center 110, the lower the eddy current loss generated by the stator to which the stator punching sheet 100 is applied. In this way, the stator punching sheet 100 can reduce the eddy current loss generated by the stator even if the number of rivets is not reduced. The stator punching sheet 100 provides a possibility for reducing the eddy current loss of the stator and avoiding the reduction of the structural strength of the stator.

[0035] As shown in Table 1:

[0036]

[0037] It should be noted that the difference between the stator punching sheet 100 of the reference stator and the stator punching sheet 100 of the stator provided by the utility model is that the first center line 710 of the stator punching sheet 100 of the reference stator passes through the first oil return notch 230. It can be seen that the stator 100 using the stator punching sheet 100 provided by the utility model has lower eddy current loss.

[0038] As shown in Table 2:

[0039]

[0040] It can be seen that the farther the first rivet hole 910 is from the rotation center 110 , the lower the eddy current loss of the stator punching sheet 100 .

[0041] It is worth mentioning that, optionally, in the first embodiment, the stator punching sheet 100 is further provided with a second rivet hole 920, and the second rivet hole 920 is for the rivet buckle to pass through. It can be understood that, in this embodiment, there are at least two kinds of rivet holes on the stator punching sheet 100 for the rivet buckle to pass through, one is the first rivet hole 910, and the other is the second rivet hole 920. Of course, in some alternative embodiments, the rivet holes on the stator punching sheet 100 for the rivet buckle to pass through can also be configured as all first rivet holes 910.

[0042] Optionally, in the first embodiment, the oil return port 220 includes a plurality of first oil return notches 230. In this way, the number of the first oil return grooves of the stator is increased, which is beneficial to improving the oil return amount of the stator.

[0043] Optionally, in the first embodiment, the oil return port 220 includes two first oil return notches 230, and the two first oil return notches 230 are respectively arranged on both sides of the corresponding first center line 710, that is, in the circumferential direction of the stator punching sheet 100, the two first oil return notches 230 are respectively arranged on both sides of the corresponding first center line 710. In this way, the two first oil return notches 230 are distributed on both sides of the first center line 710 to avoid the first oil return groove being too concentrated, so that the heat dissipation of the stator is more uniform. In some alternative embodiments, the two first oil return notches 230 are arranged on the same side of the first center line 710.

[0044] Optionally, in some embodiments, the tooth portion 600 has a center line extending to the rotation center 110, and for the first tooth portion 630, the center line of the first tooth portion 630 is configured as the first center line 710. In the circumferential direction of the cut-length punching sheet, the first oil return notch 230 is provided between the first center line 710 and the center line adjacent to the first center line 710. In some alternative embodiments, the first oil return notch 230 may also be provided at other positions of the yoke 200, which is not limited here.

[0045] Optionally, in some embodiments, the two first oil return gaps 230 are symmetrically arranged about the first center line 710 . In some alternative embodiments, the two first oil return gaps 230 are not symmetrical about the first center line 710 .

[0046] Optionally, in the first embodiment, a plurality of first tooth portions 630 are provided, a plurality of oil return ports 220 are provided, and one oil return port 220 is provided corresponding to one first tooth portion 630. In this way, the number of first rivet holes 910 is large, which is conducive to improving the structural stability of the stator. In addition, the stator punching sheet 100 provides the possibility of reducing the eddy current loss of the stator and avoiding the reduction of the structural strength of the stator.

[0047] The first oil return notch 230 has various structural forms. Optionally, in the first embodiment, the first oil return notch 230 has a first edge 231 and a second edge 232 connecting the first edge 231. The second edge 232 is disposed between the first edge 231 and the corresponding first center line 710. The outer periphery of the yoke 200 is provided with a connecting edge 210 connecting the two second edges 232. The first edge 231 is disposed in a straight line. In other embodiments, the first edge 231 may also be disposed in an arc shape.

[0048] Optionally, in the first embodiment, the second side 232 is arranged in a straight line.

[0049] Optionally, in the first embodiment, the angle between the second side 232 and the first side 231 is A, 120°≤A≤160°. Whether the value of A is too small or too large, a large stress will be generated when the stator punching sheet 100 is assembled with the stator housing, thereby causing a large iron loss of the stator. When 120°≤A≤160°, the stress generated when the stator punching sheet 100 is assembled with the stator housing can be small, thereby reducing the iron loss of the stator.

[0050] Optionally, in the first embodiment, a line groove 800 is provided corresponding to a first oil return notch 230, and in the extension direction of the corresponding first center line 710, the line groove 800 has a groove edge section 810 opposite to the first edge 231 of the corresponding first oil return notch 230, and the groove edge section 810 is provided on the yoke 200, and the groove edge section 810 and the first edge 231 are provided in parallel. In this way, the thickness of the yoke 200 can be made more uniform. Optionally, in the first embodiment, the groove edge section 810 and the corresponding first edge 231 both extend along the width direction of the tooth body 610 of the tooth portion 600.

[0051] Optionally, in the first embodiment, the maximum distance from the outer periphery of the yoke 200 to the rotation center 110 is R, the connecting edge 210 is arranged in an arc shape, the center of the connecting edge 210 is the rotation center 110, and the radius of the connecting edge 210 is R. It can be understood that the first center line 710 passes through the connecting edge 210. This allows the rivet to be at a greater distance from the rotation center 110. However, the present design is not limited thereto, and in other embodiments, the connecting edge 210 can also be in other shapes, which are not limited here, as long as the connecting edge 210 and the first center line 710 pass through the point where the distance from the outer periphery of the yoke 200 to the rotation center 110 is the maximum.

[0052] Optionally, in the first embodiment, the tooth portion 600 has a tooth body 610 connected to the yoke portion 200, and a tooth shoe 620 connected to the tooth body 610, the connection between the first side 231 and the second side 232 is a first connection, and the distance between the two first connections of the oil return port 220 is greater than the width of the tooth body 610 of the corresponding first tooth portion 630. In this way, the first connection is farther away from the corresponding first center line 710, so as to facilitate the opening of the first rivet hole 910. In some alternative embodiments, the distance between the two first connections of the oil return port 220 is less than or equal to the width of the tooth body 610 of the corresponding first tooth portion 630.

[0053] Optionally, in the first embodiment, the minimum distance between the first rivet hole 910 and the connecting edge 210 is y, and y≥2 mm. In this way, the stator sheet 100 can have a higher structural strength.

[0054] Optionally, in the first embodiment, the plurality of tooth portions 600 further include a plurality of second tooth portions 640, and the outer periphery of the yoke portion 200 is further provided with a plurality of second oil return notches 240, one second oil return notch 240 is provided corresponding to one second tooth portion 640, and the second tooth portion 640 has a second center line 720 extending to the rotation center 110, and the second center line 720 passes through the corresponding second oil return notch 240. In this way, the oil return amount of the stator is increased.

[0055] Optionally, in the first embodiment, the area of ​​the second oil return notch 240 is larger than the area of ​​the first oil return notch 230. Thus, the second oil return notch 240 mainly solves the problem of stator oil return, and the first oil return notch 230 mainly enables the first rivet hole 910 to be as far away from the rotation center 110 as possible.

[0056] Optionally, in the first embodiment, the second oil return gap 240 is arranged in an arc shape so that the stator oil can return more smoothly. In some alternative embodiments, the second oil return gap 240 is arranged in a rectangular shape.

[0057] Optionally, in the first embodiment, the plurality of tooth portions 600 further include a plurality of third tooth portions 650, and the outer periphery of the yoke 200 is further provided with a positioning notch 250, one positioning notch 250 is provided corresponding to one third tooth portion 650, and the third tooth portion 650 has a third center line 730 extending to the center, and the third center line 730 passes through the positioning notch 250. In this way, positioning is provided for stacking a plurality of stator punching sheets 100 to form a stator, which is conducive to improving the efficiency of stator production.

[0058] Optionally, in the first embodiment, as Figure 1 and 2As shown, the number of the wire slots 800 is 9, and it can be understood that the number of the teeth 600 is also 9, wherein the number of the first teeth 630 is 3, the number of the second teeth 640 is 3, the number of the third teeth 650 is 3, and the number of the first rivet holes 910 is 3. The first teeth 630, the second teeth 640, and the third teeth 650 are alternately arranged in the circumferential direction of the stator punching sheet 100, and the angle between the two adjacent first center lines 710 is 120°, the angle between the two adjacent second center lines 720 is 120°, and the angle between the two adjacent second center lines 720 is 120°. In this way, the structure of the stator punching sheet 100 is relatively symmetrical, which is conducive to making the motor have a higher operating efficiency. It should be pointed out that Figure 1 and 2 The structure shown is merely exemplary and is not intended to limit the scope of protection of the present application. In some alternative embodiments, the number of wire slots 800, the number of first tooth portions 630, the number of second tooth portions 640, the number of third tooth portions 650, and the arrangement of the first tooth portions 630, the second tooth portions 640, and the third tooth portions 650 can also be other, which are not limited here.

[0059] The utility model also has a second implementation mode. The similarities between the second implementation mode and the first implementation mode can be referred to the description of the first implementation mode above, and no further details will be given here.

[0060] In the second embodiment, the second side 232 is arranged in an arc shape, which is helpful to reduce the stress when the stator punching sheet 100 and the stator housing are assembled, and is helpful to reduce the iron loss of the stator.

[0061] The utility model also provides a motor, which includes the aforementioned stator. The specific structure of the stator refers to the above-mentioned embodiment. Since the motor 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 described one by one here. It can be understood that the motor also includes a rotor used in conjunction with the stator.

[0062] The utility model 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 described one by one here.

[0063] The utility model 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.

[0064] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A stator punching having a rotation center for a rotor to rotate, characterized in that: Stator laminations include: yoke; as well as A plurality of tooth portions are arranged on the inner periphery of the yoke portion, the plurality of tooth portions include a first tooth portion, the first tooth portion has a first center line extending to the rotation center, the stator punching sheet is provided with a first rivet hole for the first center line to pass through, the outer periphery of the yoke portion is provided with an oil return port, the oil return port includes a first oil return notch spaced apart from the first rivet hole, and the first oil return notch avoids the first center line.

2. The stator sheet according to claim 1, characterized in that: The oil return port includes two first oil return notches, and the two first oil return notches are respectively arranged on both sides of the corresponding first center line.

3. The stator sheet according to claim 2, characterized in that: There are a plurality of the first tooth portions, there are a plurality of the oil return ports, and one oil return port is arranged corresponding to one first tooth portion.

4. The stator sheet according to claim 2, characterized in that: The first oil return notch has a first side and a second side connected to the first side, the second side is arranged between the first side and the corresponding first center line, the outer periphery of the yoke is provided with a connecting side connecting the two second sides, and the first side is arranged in a straight line.

5. The stator sheet according to claim 4, characterized in that: The second side is arranged in a straight line.

6. The stator sheet according to claim 5, characterized in that: The included angle between the second side and the first side is A, and 120°≤A≤160°.

7. The stator sheet according to claim 4, characterized in that: The second side is arranged in an arc shape; And / or, the maximum distance from the outer periphery of the yoke to the rotation center is R, the connecting edge is arranged in an arc shape, the center of the connecting edge is the rotation center, and the radius of the connecting edge is R; And / or, the tooth portion has a tooth body connected to the yoke portion, and a tooth boot connected to the tooth body, the connection between the first side and the second side is a first connection, and the distance between the two first connections of the oil return port is greater than the width of the tooth body of the corresponding first tooth portion.

8. The stator sheet according to any one of claims 4 to 7, characterized in that: The minimum distance between the first rivet hole and the connecting edge is y, and y≥2mm.

9. The stator sheet according to claim 1, characterized in that: The multiple tooth portions also include multiple second tooth portions, and the outer periphery of the yoke portion is also provided with multiple second oil return notches, one second oil return notch is arranged corresponding to one second tooth portion, and the second tooth portion has a second center line extending to the rotation center, and the second center line passes through the corresponding second oil return notch.

10. A stator, characterized in that: The invention comprises a stator sheet as claimed in any one of claims 1 to 9.

11. A motor, characterized in that: Comprising the stator as claimed in claim 10.

12. A compressor, characterized in that: Comprising the motor as claimed in claim 11.

13. A refrigeration device, characterized in that: Comprising the compressor of claim 12.

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