An insulating framework, a motor stator, a motor and an air conditioner

Abstract

The application relates to the motor technical field, in particular to an insulation framework, a motor stator with the insulation framework, a motor with the motor stator and an air conditioner with the motor. The insulation framework comprises two annular frameworks symmetrically arranged at two ends of the stator, the annular framework comprises a supporting frame and a plurality of slot insulation parts, the plurality of slot insulation parts are protruded on one side of the supporting frame along the circumferential direction, two groups of the plurality of slot insulation parts are mutually inserted into corresponding stator core slots, and the opening cross-section contour projection of the slot insulation part is larger than the root cross-section contour projection. The design of the application ensures stable assembly between the stator core and the slot insulation part and prevents loosening. Meanwhile, the design of the application can also avoid the formation of protrusions at the insertion positions of the two inserted slot insulation parts, effectively prevent the protrusions from scratching the enameled wire, and finally improve the reliability of the stator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an insulation framework, an electric machine stator with the insulation framework, an electric machine with the electric machine stator, and an air conditioner with the electric machine. BACKGROUND

[0002] An insulation electric machine mainly consists of a stator and a rotor, and the stator is generally insulated by an insulation framework. The insulation framework is an injection molding part arranged at the end of the stator and having a wire passing structure design. In the prior art, the cross-sectional profile projection of the opening of the slot insulation part is smaller than the cross-sectional profile projection of the root, and the distance between the two adjacent pairs of inserted slot insulation parts and the stator core is as shown in FIGS. 1 and 2, i.e., the distance between the opening of the two adjacent pairs of inserted slot insulation parts and the stator core is greater than the distance between the root of the two adjacent pairs of inserted slot insulation parts and the stator core, thereby causing unstable assembly of the insulation framework and the stator core and easily leading to loosening. Figure 6 and Figure 7 SUMMARY

[0003] The present application aims to provide an insulation framework, an electric machine stator, an electric machine, and an air conditioner to solve the problem of unstable assembly of the insulation framework and the stator core and easy loosening in the prior art.

[0004] (I) Technical solution

[0005] To achieve the above-mentioned purpose, the present application provides an insulation framework in the first aspect, comprising: two annular frameworks symmetrically arranged at the two ends of a stator, the annular framework comprising: a support frame and a plurality of slot insulation parts, the plurality of slot insulation parts being protrudingly arranged on one side of the support frame along the circumferential direction, and the two groups of plurality of slot insulation parts being inserted into the corresponding stator core slots, respectively, and the cross-sectional profile projection of the opening of the slot insulation part being greater than the cross-sectional profile projection of the root.

[0006] Optionally, the wall thickness of the slot insulation part gradually increases along the direction from the root to the opening.

[0007] Optionally, a relief groove is arranged on the support frame at the position where the root of the slot insulation part is in contact with the support frame, and the relief groove is arranged along the circumferential direction of the slot insulation part.

[0008] Optionally, the relief groove is continuously arranged along the circumferential direction of the slot insulation part.

[0009] Optionally, the relief groove is discontinuously arranged along the circumferential direction of the slot insulation part, and the relief groove is arranged at a stress concentration position.

[0010] Optionally, the depth of the relief groove is equally arranged along the circumferential direction of the slot insulation part.

[0011] ​Optionally, the depth of the avoiding groove is uneven along the circumference of the groove insulation part.

[0012] Optionally, the end of one group of the groove insulation parts is provided with a male groove, and the end of another group of the groove insulation parts is provided with a female groove.

[0013] To achieve the above-mentioned purpose, the second aspect of the present application provides a motor stator, comprising the insulation framework as any one of the preceding.

[0014] To achieve the above-mentioned purpose, the third aspect of the present application provides a motor, comprising the motor stator as the preceding.

[0015] To achieve the above-mentioned purpose, the fourth aspect of the present application provides an air conditioner, comprising the motor as the preceding.

[0016] (B) beneficial effects

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] The present application provides an insulation framework, comprising: two annular frameworks symmetrically arranged at both ends of the stator, the annular framework comprising: a support frame and a plurality of groove insulation parts, a plurality of groove insulation parts are protrudingly arranged on one side of the support frame along the circumference, two groups of groove insulation parts are inserted into the corresponding stator core slots, and the cross-sectional profile projection of the opening of the groove insulation part is greater than the cross-sectional profile projection of the root.

[0019] The distance between the two adjacent pairs of inserted groove insulation parts and the stator core is as shown in the present application Figure 3 and Figure 4 The distance between the two adjacent pairs of inserted groove insulation parts and the stator core is as shown in the present application BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application together with the specification.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without paying creative labor, and the drawings are as follows:

[0022] Figure 1 is a sectional profile projection view of the slot insulation part in the present application;

[0023] Figure 2 is a plan view of the cooperation of the insulation framework and the stator core in the present application;

[0024] Figure 3 is a sectional profile projection view of the slot insulation part in the present application; Figure 2 is a sectional view of the A-A position in the present application;

[0025] Figure 4 is a sectional view of the A-A position in the present application; Figure 3 is a local enlarged view of the A position in the present application;

[0026] Figure 5 is a local enlarged view of the B position in the present application; Figure 3 is a local enlarged view of the B position in the present application;

[0027] Figure 6 is a sectional view of the A-A position in the prior art; Figure 2 is a sectional view of the A-A position in the prior art;

[0028] Figure 7 is a local enlarged view of the A position in the prior art; Figure 6 is a local enlarged view of the A position in the prior art;

[0029] Figure 8 is a structural schematic view of the cooperation of the support frame and the slot insulation part in the present application;

[0030] Figure 9 is a local enlarged view of the A position in the present application; Figure 5

[0031] Figure 10 is a structural schematic view of the cooperation of the support frame and the slot insulation part in the prior art;

[0032] Figure 11 is a local enlarged view of the A position in the prior art; Figure 7 is a local enlarged view of the A position in the prior art;

[0033] Figure 12 is a structural schematic view of the motor stator in the present application;

[0034] Figure 13 is an exploded view of the motor stator in the present application.

[0035] ​In the diagram: 1. Ring frame; 2. Support frame; 3. Slot insulation part; 4. Stator core slot; 5. Opening; 6. Root; 7. Clearance slot; 8. Insertion male slot; 9. Insertion female slot; 10. Winding assembly; 11. Lead wire assembly; 12. Stator core. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0038] like Figures 1-13 As shown, the first aspect of this application provides an insulating frame, comprising: two annular frames 1 symmetrically disposed at both ends of a stator. Each annular frame 1 includes: a support frame 2 and a plurality of slot insulating portions 3. The plurality of slot insulating portions 3 protrude circumferentially from one side of the support frame 2. Both sets of plurality of slot insulating portions 3 are interlocked within corresponding stator core slots 4. The cross-sectional profile projection of the opening 5 of the slot insulating portion 3 is larger than the cross-sectional profile projection of the root 6. The difference between the cross-sectional profile projection of the opening 5 of the slot insulating portion 3 and the cross-sectional profile projection of the root 6 is 'a'.

[0039] Then a needs to satisfy the relation.

[0040] Where h is the length of the slot insulation part, σ is the bending strength of the slot insulation part material, E is the elastic modulus of the material, and μ is the Poisson's ratio of the material;

[0041] Specifically, the length of the slot insulation part can be set to 10-40mm. The material of the slot insulation part can generally be polyvinyl chloride resin. Of course, the specific material of the slot insulation part can be selected according to the specific use environment. For example, when the use environment is a high-temperature environment, the material of the corresponding slot insulation part is preferably a high-temperature resistant material.

[0042] Preferably, the end of one group of slot insulation parts 3 is provided with a male slot 8, and the end of another group of slot insulation parts 3 is provided with a female slot 9, the slot insulation parts 3 of one group are inserted into the female slots of the slot insulation parts 3 of the other group, of course, the male slots and the female slots can be arranged in the middle of the slot insulation parts 3 of one group, or some of the slot insulation parts 3 are provided with the male slots and the other slot insulation parts 3 are provided with the female slots, as long as the two groups of slot insulation parts can be inserted into each other, the arrangement mode is within the protection scope of the present application.

[0043] In the prior art, the cross-sectional profile projection of the opening of the slot insulation part is smaller than the cross-sectional profile projection of the root, the distance between the two pairs of inserted slot insulation parts and the stator core is as shown in Figure 6 and Figure 7 , that is, the distance between the opening of the two pairs of inserted slot insulation parts and the stator core is greater than the distance between the root of the two pairs of inserted slot insulation parts and the stator core, that is, the assembly of the stator core and the opening of the slot insulation part is loose, and the assembly of the stator core and the root of the slot insulation part is tight, thereby causing the assembly of the insulation framework and the stator core to be unstable, and prone to loosening; and referring to Figure 7 It can be seen that in the prior art, the position where the male slot and the female slot are matched forms a protrusion, when the enameled wire is wound around the position, the protrusion will scratch the enameled wire, thereby reducing the reliability of the stator.

[0044] And the distance between the two pairs of inserted slot insulation parts and the stator core in the design of the present application is as shown in Figure 3 and Figure 4 , that is, the distance between the opening of the two pairs of inserted slot insulation parts and the stator core is smaller than the distance between the root of the two pairs of inserted slot insulation parts and the stator core, but the stator core will generate an expansion force on the root of the slot insulation part during assembly, under the action of the above expansion force, the distance between the root of the two pairs of inserted slot insulation parts and the stator core will also increase to a certain extent, so as to make the distance between the opening and the root of the two pairs of inserted slot insulation parts and the stator core be substantially equal, that is, the two slot insulation parts in the inserted mode will be stably assembled in the corresponding stator core, thereby ensuring the stable assembly between the stator core and the slot insulation part, and preventing loosening; at the same time, the design of the present application can also avoid the formation of a protrusion between the two inserted slot insulation parts, effectively avoiding the scratching of the enameled wire by the protrusion, and finally improving the reliability of the stator.

[0045] Of course, in order to ensure the stable assembly of the insulation framework and the electronic core, the influence of the shape tolerance of the stator core and the shape tolerance of the insulation framework also needs to be considered, an additional gap a1 is arranged between the side surfaces of the slot insulation part and the stator core, the value of a1 is between the upper limit sum and the lower limit sum of the shape tolerance of the two mating surfaces.

[0046] According to another embodiment of the present application, the wall thickness of the slot insulation part 3 gradually increases along the root 6 towards the opening 5, in particular, the wall thickness of the opening of the slot insulation part 3 is greater than the wall thickness of the root of the slot insulation part 3, the design of the present embodiment can reduce the distance between the openings of the two adjacent pairs of inserted slot insulation parts and the stator core, that is, the distance between the openings and the roots of the two adjacent pairs of inserted slot insulation parts and the stator core is adjusted to be substantially equal, that is, the two slot insulation parts inserted and matched are stably assembled in the corresponding stator core, thereby ensuring stable assembly between the stator core and the slot insulation part, and preventing loosening; at the same time, the design of the present application can also avoid the formation of a protrusion at the insertion position of the two inserted and matched slot insulation parts, effectively preventing the protrusion from scratching the enameled wire, and finally improving the reliability of the stator.

[0047] According to one embodiment of the present application, as shown in Figure 6 , Figure 10 and Figure 11 , in the prior art, the insulation framework generates internal stress concentration at the structure bending part (that is, the root of the slot insulation part) during the injection molding process, and the position where the root of the slot insulation part is connected with the support frame 2 will also be a stress concentration position during the assembly process of the slot insulation part and the support frame 2, thereby causing the stress concentration position to crack and excessively deform, and other reliability risk problems.

[0048] Referring to Figure 3 , Figure 5 , Figure 8 and Figure 9 , in order to solve the above problems, the present embodiment adopts an avoiding groove 7 which is provided on the support frame 2 and contacts the root 6 of the slot insulation part 3, the avoiding groove 7 is circumferentially arranged along the slot insulation part 3, preferably, the avoiding groove 7 is continuously arranged along the circumferential direction of the slot insulation part 3, and the depth of the avoiding groove 7 is less than the thickness of the slot insulation part 3, thereby effectively dispersing the stress at the position where the root of the slot insulation part is connected with the support frame 2, enhancing the connection strength between the slot insulation part and the support frame 2, and avoiding cracking and other problems.

[0049] Of course, the avoiding groove 7 can also be discontinuously arranged along the circumferential direction of the slot insulation part 3, and the avoiding groove 7 is arranged at the stress concentration position, for example, the position contacting the enameled wire is a stress concentration position, so the avoiding groove can be arranged at the stress concentration position, and no avoiding groove is needed at the position with relatively dispersed stress, thereby reducing the processing cost.

[0050] According to one embodiment of the present application, for the case that the stress at each position where the root of the slot insulation part is connected with the support frame 2 is equal, the depth of the avoiding groove 7 is equal along the circumferential direction of the slot insulation part 3 in order to ensure the stress dispersion effect.

[0051] According to another embodiment of the present application, in the case that the stress at each position where the root of the slot insulation part is connected with the support frame 2 is not equal, in order to ensure the stress dispersion effect, the depth of the avoiding slot 7 is set to be unequal along the circumference of the slot insulation part 3, that is, the position with higher stress intensity is provided with a deeper avoiding slot, and the position with lower stress intensity is provided with a shallower avoiding slot.

[0052] The second aspect of the present application provides a motor stator, comprising the insulation framework of any one of the preceding aspects.

[0053] The third aspect of the present application provides a motor, comprising the motor stator of the preceding aspect.

[0054] The fourth aspect of the present application provides an air conditioner, comprising the motor of the preceding aspect.

[0055] Each of the embodiments in the present specification is described in a progressive manner, and several embodiments focus on the differences from other embodiments, and the same or similar parts between each embodiment can be referred to each other.

[0056] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower" and the like are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying importance; the words "bottom surface" and "top surface", "inner" and "outer" respectively refer to the direction towards or away from the geometry of a particular component.

[0057] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "communication", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly communicated, or it can be indirectly communicated through an intermediate medium, or it can be the communication between the interiors of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0058] The above is only the preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An insulating frame, characterized in that, include: Two annular frames (1) are symmetrically arranged at both ends of the stator. The annular frames (1) include a support frame (2) and several slot insulation parts (3). Several slot insulation parts (3) are circumferentially protruding on one side of the support frame (2). The two sets of several slot insulation parts (3) are inserted into the corresponding stator core slots (4). An additional gap a1 is provided between the slot insulation part (3) and the side of the stator core where they mate. The value of a1 is between the upper limit and the lower limit of the form and position tolerances of the two mating surfaces at that point. The cross-sectional profile projection of the opening (5) of the slot insulation part (3) is greater than the cross-sectional profile projection of the root (6). The difference between the cross-sectional profile projection of the opening (5) of the slot insulation part (3) and the cross-sectional profile projection of the root (6) is a, and a satisfies Where h is the length of the groove insulation part (3), σ is the bending strength of the material of the groove insulation part (3), E is the elastic modulus of the material, and μ is the Poisson's ratio of the material; An avoidance groove (7) is provided on the support frame (2) at the position where it contacts the root (6) of the slot insulation part (3). The avoidance groove (7) is arranged around the slot insulation part (3) and the depth of the avoidance groove (7) is less than the thickness of the slot insulation part (3).

2. The insulating frame according to claim 1, characterized in that, The wall thickness of the slot insulation part (3) gradually increases along the root (6) toward the opening (5).

3. The insulating frame according to claim 1, characterized in that, The clearance groove (7) is continuously provided along the circumference of the groove insulation part (3).

4. The insulating frame according to claim 1, characterized in that, The clearance groove (7) is discontinuously arranged along the circumference of the groove insulation part (3), and the clearance groove (7) is located at the stress concentration position.

5. The insulating frame according to any one of claims 1-4, characterized in that, The depth of the clearance groove (7) is set equally along the circumference of the groove insulation part (3).

6. The insulating frame according to any one of claims 1-4, characterized in that, The depth of the clearance groove (7) is not uniform along the circumference of the groove insulation part (3).

7. The insulating frame according to claim 1, characterized in that, One group of several slot insulation parts (3) are provided with male insertion slots (8) at their ends, and another group of several slot insulation parts (3) are provided with female insertion slots (9) at their ends.

8. A motor stator, characterized in that, include: The insulating frame as described in any one of claims 1-7.

9. An electric motor, characterized in that, include: The motor stator as described in claim 8.

10. An air conditioner, characterized in that, include: The motor as described in claim 9.

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