CN112039248A - Insulating skeleton, motor stator, motor and air conditioner - Google Patents

Abstract

The invention relates to the technical field of motors, in particular to an insulating framework, a motor stator with the insulating framework, a motor with the motor stator and an air conditioner with the motor. This insulating skeleton includes: the symmetry sets up in two annular skeletons at stator both ends, annular skeleton includes: the stator core comprises a supporting frame and a plurality of groove insulating parts, wherein the groove insulating parts are arranged on one side of the supporting frame in a protruding mode along the circumferential direction, two groups of the groove insulating parts are mutually inserted into corresponding stator core grooves, and the cross section outline projection of an opening of each groove insulating part is larger than that of a root part; the design of the invention ensures that the stator core and the slot insulating part are stably assembled and are not easy to loosen; meanwhile, the design of the invention can also avoid the two slot insulation parts which are in plug-in fit to form bulges at the plug-in position, effectively avoid the bulges from scratching the enameled wire and finally improve the reliability of the stator.

Description

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

technical field

The present invention relates to the technical field of electric motors, in particular to an insulating frame, a motor stator having an insulating frame, a motor having a motor stator, and an air conditioner having a motor.

Background technique

The insulated motor is mainly composed of two main parts, the stator and the rotor. The motor stator is generally insulated by an insulating skeleton. The insulating frame is an injection molded part that is arranged at the end of the motor stator and has a wire-passing structure design; The distance between the part and the stator core is as shown in Figure 6 and Figure 7, that is, the distance between the openings of the two adjacent pairs of slot insulation parts inserted and the stator core is greater than the distance between the two adjacent pairs of slot insulation parts inserted. The distance between the root and the stator core makes the assembly of the insulating skeleton and the stator core unstable and prone to loosening.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide an insulating skeleton, a motor stator, a motor and an air conditioner, so as to solve the problem of unstable assembly of the insulating skeleton and the stator core in the prior art and easy to loose.

(1) Technical scheme

In order to achieve the above object, the first aspect of the present invention provides an insulating frame, including: two annular frames symmetrically arranged at both ends of the stator, the annular frame includes: a support frame and a plurality of slot insulating parts, a plurality of the slots The insulating portion is protruded on one side of the support frame along the circumferential direction, and the two groups of the slot insulating portions are inserted into the corresponding stator core slots. Contour projection.

Optionally, the thickness of the wall surface of the slot insulating portion gradually increases along the direction from the root to the opening.

Optionally, an escape groove is provided on the support frame at a position in contact with the root of the slot insulating portion, and the escape groove is arranged along the circumferential direction of the slot insulating portion.

Optionally, the escape grooves are continuously arranged along the circumferential direction of the groove insulating portion.

Optionally, the escape grooves are provided discontinuously along the circumferential direction of the groove insulating portion, and the escape grooves are disposed at a stress concentration position.

Optionally, the depths of the escape grooves are set to be equal along the circumferential direction of the groove insulating portion.

Optionally, the depths of the escape grooves are set unequally along the circumferential direction of the groove insulating portion.

Optionally, the ends of a plurality of the slot insulating parts in one group are provided with male sockets for plugging, and the ends of the insulating parts in the other group are provided with female sockets for plugging.

To achieve the above object, a second aspect of the present invention provides a motor stator, comprising: the insulating skeleton according to any one of the foregoing.

To achieve the above object, a third aspect of the present invention provides a motor, comprising: the motor stator as described above.

To achieve the above object, a fourth aspect of the present invention provides an air conditioner, comprising: the motor as described above.

(2) Beneficial effects

Compared with the prior art, the present invention has the following beneficial effects:

The invention provides an insulating skeleton, comprising: two annular skeletons symmetrically arranged at both ends of the stator, the annular skeleton includes: a support frame and a plurality of slot insulating parts, and the plurality of the slot insulating parts are protruded along the circumferential direction On one side of the support frame, the two groups of the slot insulating parts are inserted into the corresponding stator core slots, and the projection of the cross-sectional profile of the opening of the slot insulating part is larger than the projection of the cross-sectional profile of the root;

According to the design of the present invention, the distance between the two adjacent pairs of inserted slot insulating parts and the stator core is as shown in FIG. 3 and FIG. The distance is smaller than the distance between the roots of the two adjacent pairs of slot insulation parts and the stator core, but the stator core will generate expansion force on the root of the slot insulation part during assembly. Under the action of the above expansion force, adjacent The distance between the roots of the two pairs of inserted slot insulating parts and the stator iron core will also increase to a certain extent, so that the openings and roots of the two adjacent pairs of inserted slot insulating parts are basically equal to the distance between the stator iron core and the stator iron core. It ensures stable assembly between the stator iron core and the slot insulating part, and is not easy to loosen; at the same time, the design of the present invention can also avoid the formation of protrusions at the insertion position of the two plugged and matched slot insulating parts, and effectively prevent the protrusions from scratching the enameled wire. , and ultimately improve the reliability of the stator.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. In other words, on the premise of no creative labor, other drawings can also be obtained from these drawings, including:

1 is a cross-sectional profile projection view of a slot insulating portion of the present invention;

Fig. 2 is the top view of insulating skeleton and stator iron core matching in the present invention;

Fig. 3 is the sectional view of A-A position in Fig. 2 among the present invention;

Fig. 4 is a partial enlarged view of position A in Fig. 3;

Fig. 5 is a partial enlarged view of position B in Fig. 3;

Fig. 6 is the sectional view of A-A position in Fig. 2 in the prior art;

Fig. 7 is a partial enlarged view of position A in Fig. 6;

8 is a schematic structural diagram of the cooperation between the support frame and the slot insulating part in the present invention;

Fig. 9 is a partial enlarged view of position A in Fig. 5;

FIG. 10 is a schematic structural diagram of the cooperation between the support frame and the slot insulating part in the prior art;

Fig. 11 is a partial enlarged view of position A in Fig. 7;

Fig. 12 is the structural schematic diagram of the motor stator in the present invention;

Fig. 13 is an exploded view of the stator of the motor in the present invention.

In the figure: 1. Ring frame; 2. Support frame; 3. Slot insulation; 4. Stator core slot; 5. Opening; 6. Root; 7. Avoidance slot; 10. Winding winding; 11. Lead wire assembly; 12. Stator iron core.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments:

As shown in FIG. 1 to FIG. 13 , the first aspect of the present application provides an insulating skeleton, including: two annular skeletons 1 symmetrically arranged at both ends of the stator, and the annular skeleton 1 includes: a support frame 2 and a plurality of slot insulating parts 3 , A plurality of slot insulating portions 3 are protruded on one side of the support frame 2 along the circumferential direction, and two groups of a plurality of slot insulating portions 3 are inserted into the corresponding stator core slots 4, and the opening of the slot insulating portion 3 has a cross-section 5. The contour projection is greater than the cross-sectional contour projection of the root portion 6; wherein, the difference between the cross-sectional contour projection of the opening 5 of the slot insulating portion 3 and the root portion 6 cross-sectional contour projection is a,

a needs to satisfy the relation

Where h is the length of the slot insulation, σ is the bending strength of the slot insulation material, E is the elastic modulus of the material, and μ is the Poisson’s ratio of the material;

Specifically, the length of the slot insulation part can be set to: 10-40mm, and the material of the slot insulation part can generally be made of polyvinyl chloride resin. Of course, the specific material of the slot insulation part can be selected according to the specific use environment, for example, the use environment is high temperature resistant. In the environment, the material of the corresponding slot insulating part is preferably a high temperature resistant material.

Preferably, the ends of one group of several slot insulating parts 3 are provided with plug-in male grooves 8 , and the ends of the other group of several groove insulation parts 3 are all provided with plug-in female grooves 9 . The insulating part 3 is plugged and matched with the plug-in female grooves of the other group of groove insulating parts 3 through the plug-in male grooves. The female socket, or a part of which is provided with a male socket, and the other part is provided with a socket socket, as long as the arrangement of the two groups of groove insulation parts can be realized by plugging and matching, it belongs to the protection scope of this scheme;

In the prior art, the projection of the cross-sectional profile of the opening of the slot insulating portion is smaller than the projection of the cross-sectional profile of the root portion. The distance between the opening of the inserted slot insulation part and the stator core is greater than the distance between the roots of the two adjacent pairs of inserted slot insulation parts and the stator core, that is to say, the stator core and the slot insulation part are assembled at the opening. It is relatively loose, and the stator core and the root of the slot insulating part are assembled relatively tightly, resulting in unstable assembly of the insulating skeleton and the stator core, which is prone to loosening; and it can be seen with reference to FIG. The position where the male groove and the plug-in female groove 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.

The distance between the two adjacent pairs of inserted slot insulating parts and the stator iron core according to the design of the present invention is as shown in Figures 3 and 4, that is, the openings of the two adjacent pairs of inserted slot insulation parts are connected to the stator iron core. The spacing is smaller than the spacing between the roots of the two adjacent pairs of slot insulation parts and the stator core, but the stator core will generate expansion force on the root of the slot insulation part during assembly. Under the action of the above expansion force, the phase The distance between the roots of the two adjacent pairs of slot insulation parts and the stator core will also increase to a certain extent, so that the distance between the openings and the roots of the two adjacent pairs of slot insulation parts and the stator core are basically equal, respectively. That is to say, the two slot insulating parts that are inserted and matched will be stably assembled in the corresponding stator iron core, so as to ensure stable assembly between the stator iron core and the slot insulating part, and it is not easy to loosen; at the same time, the design of the present invention can also avoid The two plug-fitted slot insulating parts form protrusions at the plug-in position, which can effectively avoid the protrusions from scratching the enameled wire, and ultimately improve the reliability of the stator;

Of course, in order to ensure the stable assembly of the insulating skeleton and the electronic iron core, it is also necessary to consider the influence of the shape and position tolerance of the stator iron core and the shape and position tolerance of the insulating skeleton. The value of a1 is between the sum of the upper limit and the lower limit of the respective geometric tolerances of the two mating surfaces.

According to another embodiment of the present invention, the wall thickness of the slot insulating portion 3 gradually increases along the direction of the root portion 6 toward the opening 5 . Specifically, the wall thickness at the opening of the slot insulating portion 3 is greater than that at the root portion of the slot insulating portion 3 . , using the design of this embodiment, the distance between the openings of the two adjacent pairs of slot insulation parts and the stator core can be reduced, that is, the openings and roots of the two adjacent pairs of slot insulation parts are respectively connected to The spacing of the stator cores is adjusted to be basically equal, that is to say, the two slot insulation parts of the plug-fit will be stably assembled in the corresponding stator cores, so as to ensure the stable assembly between the stator core and the slot insulation parts, and it is not easy to loosen At the same time, the design of the present invention can also avoid the formation of bulges at the insertion position of the two slot insulating parts that are inserted and matched, effectively avoid the bulges from scratching the enameled wire, and finally improve the reliability of the stator.

According to an embodiment of the present invention, as shown in FIG. 6 , FIG. 10 and FIG. 11 , in the prior art, during the injection molding process of the insulating skeleton, the structure is bent (that is to say, the root of the slot insulating portion) will be internally Stress concentration, during the assembly process of the slot insulation part and the support frame 2, the position where the root of the slot insulation part and the support frame 2 is connected will also be the position of stress concentration, which will cause cracking and excessive deformation at the stress concentration position. reliability risk issues;

Referring to FIGS. 3 , 5 , 8 and 9, it can be seen that in order to solve the above-mentioned problems in this embodiment, an escape groove 7 is provided on the support frame 2 at the position where it contacts the root 6 of the groove insulating portion 3, and the escape groove is 7 is arranged along the circumferential direction of the slot insulating portion 3, preferably, the avoidance grooves 7 are continuously arranged along the circumferential direction of the slot insulating portion 3, and the depth of the avoidance groove 7 is smaller than the thickness of the slot insulating portion 3, so as to effectively disperse the slot insulating portion. The stress at the connection position between the root of the groove and the support frame 2 enhances the connection strength between the slot insulation part and the support frame 2 and avoids problems such as cracking.

Of course, the avoidance grooves 7 can also be discontinuously arranged along the circumferential direction of the groove insulating portion 3, and the avoidance grooves 7 are arranged at the position where the stress is concentrated. Avoidance grooves are set at the concentrated position, and there is no need to set the avoidance groove at the position where the stress is relatively dispersed, thereby reducing the processing cost;

According to an embodiment of the present invention, in the case where the stress at the connection position between the root of the slot insulating portion and the support frame 2 is equal, correspondingly, in order to ensure the stress dispersion effect, the depth of the slot 7 is avoided along the length of the slot insulating portion 3 . Circumferential is equal setting.

According to another embodiment of the present invention, in the case where the stress is not equal everywhere where the root of the slot insulating portion and the support frame 2 are connected, correspondingly, in order to ensure the stress dispersion effect, the depth of the slot 7 is avoided along the slot insulating portion 3 . The circumferential direction is unequal, that is to say, a deeper avoidance groove is set at the position with higher stress intensity, and a shallower depth avoidance groove is set at the position with lower stress intensity.

A second aspect of the present application provides a motor stator, comprising: the insulating skeleton according to any one of the foregoing.

A third aspect of the present application provides a motor, comprising: the aforementioned motor stator.

A fourth aspect of the present application provides an air conditioner, comprising: the aforementioned motor.

Each embodiment in this specification is described in a progressive manner, and several embodiments focus on the differences from other embodiments, and the same and similar parts between the various embodiments may be referred to each other.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying importance; the words "bottom" and "top", "inner" and "outer", respectively, refer to the orientation toward or away from a specific part geometry.

In the description of the present invention, it should be noted that the terms "installation", "communication" and "connection" should be understood in a broad sense unless otherwise expressly specified and limited. For example, it may be a fixed connection or a detachable connection. Connection, or integral connection; may be mechanical connection or electrical connection; may be direct communication, or indirect communication through an intermediate medium, and may be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations. Also, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Inside.

Claims (11)

1. An insulating skeleton, comprising: the symmetry sets up in two annular skeleton (1) at stator both ends, annular skeleton (1) includes: the stator core comprises a supporting frame (2) and a plurality of groove insulating parts (3), wherein the groove insulating parts (3) are arranged on one side of the supporting frame (2) in a protruding mode along the circumferential direction, the groove insulating parts (3) are arranged in two groups of stator core grooves (4) in an inserting mode, and the projection of the cross section outline of an opening (5) of each groove insulating part (3) is larger than that of the cross section outline of a root (6).

2. An insulating skeleton according to claim 1, characterized in that the wall thickness of the slot insulating part (3) is gradually increased along the root (6) towards the opening (5).

3. The insulation framework of claim 1, wherein an avoidance groove (7) is formed in a position, in contact with the root portion (6) of the groove insulation portion (3), of the support frame (2), and the avoidance groove (7) is circumferentially arranged along the groove insulation portion (3).

4. Insulation skeleton according to claim 3, characterized in that, the dodge groove (7) is continuous along the circumference of the groove insulation (3).

5. The insulating skeleton according to claim 3, characterized in that, the dodge groove (7) is discontinuously arranged along the circumference of the groove insulating part (3), and the dodge groove (7) is arranged at the position of stress concentration.

6. An insulating skeleton according to any one of claims 3-5, characterized in that the depth of the escape grooves (7) is equally arranged along the circumference of the groove insulation (3).

7. An insulating skeleton according to any one of claims 3-5, characterized in that the depth of the escape grooves (7) is arranged unequally along the circumference of the groove insulation (3).

8. An insulating skeleton according to claim 1, characterized in that, the end of one group of several slot insulating parts (3) is provided with a male slot (8) and the end of the other group of several slot insulating parts (3) is provided with a female slot (9).

9. An electric machine stator, comprising: an insulating skeleton as claimed in any one of claims 1 to 8.

10. An electric machine, comprising: the electric machine stator of claim 9.

11. An air conditioner, comprising: the electric machine of claim 10.

Images