CN118611302A - A stator winding insulation structure of concentrated winding - Google Patents

Abstract

The invention discloses a stator winding insulation structure of concentrated windings, which comprises: the laminated layers are provided with a plurality of pieces, the laminated layers are arranged in a superposition manner, a stator groove is formed in the inner side of the laminated layers, protruding parts are formed on the side edges of the stator groove, and rivets for fixing are arranged between the laminated layers in a penetrating manner; an insulating member disposed in the stator slot for separating the lamination and the winding; the supporting part is provided with a plurality of groups. According to the invention, the winding is supported by the three support shafts, the middle support shaft extrudes the winding downwards, the two surrounding support shafts support the winding, so that the winding is in a tight state, the coil winding can be effectively fixed and supported, displacement or looseness caused by vibration or other external force in the operation process is prevented, the relative movement between the winding and the stator core is reduced, abrasion is reduced, the service life of the motor is prolonged, and noise is further reduced.

Description

A stator winding insulation structure of concentrated winding

Technical Field

The invention relates to the technical field of motor stators, and in particular to a stator winding insulation structure of a concentrated winding.

Background Art

The motor stator is an important component of motors such as generators and starters. It is mainly composed of three parts: stator core, stator winding and frame. As a type of motor winding, the stator winding is fixed to the stator part of the motor and does not move with the rotation of the motor. This fixity enables the stator winding to stably generate a rotating magnetic field and provide a stable magnetic field environment for the operation of the motor.

The material selection of the stator has an important impact on the performance, efficiency and life of the motor. Silicon steel sheets are one of the most commonly used stator materials in the motor manufacturing industry due to their high magnetic permeability and low hysteresis loss. It has very low resistance and high magnetic permeability, which can effectively reduce the power loss caused by core loss and improve the motor conversion efficiency. In addition, silicon steel sheets also have good mechanical strength and high temperature resistance.

In addition, the windings on the stator core composed of silicon steel sheets should be in a relatively tight state under normal circumstances, but this tightness does not mean physical over-stretching, but means that the windings should be firmly fixed on the stator core to ensure that the windings will not loosen due to vibration or electromagnetic force during the operation of the motor. If the copper wire windings on the stator core are loose, the following consequences may occur:

1. Loose windings may cause vibration and noise during motor operation, reducing the overall performance of the motor;

2. It may cause poor contact between the winding and the stator core, increase resistance and reduce the efficiency of the motor;

3. The friction between the windings causes the insulation layer to wear, and even causes short circuit or open circuit failure, causing the winding to deform and further aggravate the damage.

Therefore, it is necessary for the winding to be in a tight state, but vibration will occur during the use of the motor, which will have a certain impact on the winding, especially when it is used for a long time.

Summary of the invention

The object of the present invention is to provide a stator winding insulation structure of a concentrated winding to solve the problems raised in the above background technology.

In order to solve the above technical problems, the present invention provides the following technical solutions: a stator winding insulation structure of a concentrated winding, comprising:

A stacking layer is provided with a plurality of sheets, wherein the plurality of sheets of the stacking layer are stacked, wherein the inner side of the plurality of sheets of the stacking layer has a stator slot, and the side of the stator slot has a protrusion, and rivets for fixing are provided through the plurality of sheets of the stacking layer;

Insulating components, arranged in the stator slots, for separating the laminations and windings;

The support parts are provided in a plurality of groups, and the plurality of groups of the support parts are respectively arranged at the two ends of the combined stacked layers, and are used for stretching the windings.

Furthermore, the insulating component includes a first partition layer, a second partition layer, a first partition tube and a second partition tube;

The partition layer 1 and the partition layer 2 are respectively arranged at the two ends of the stacked layers, and the partition layer 1 and the partition layer 2 are limited by rivets. The partition tube 1 and the partition tube 2 are respectively fixed on the opposite sides of the partition layer 1 and the partition layer 2. The partition tube 1 and the partition tube 2 are sleeved and extended into the stator slot and fit with the inner wall of the stator slot.

Furthermore, the materials of the partition layer 1, the partition layer 2, the partition tube 1 and the partition tube 2 are all insulating slot paper.

Furthermore, the support part includes insulating plates respectively bonded to interlayer one and interlayer two, the rivet penetrates the insulating plate in the support part, the inner side of the insulating plate has an integrally arranged T-shaped end, the T-shaped end overlaps with the protrusion, and the side corners of the T-shaped end are arc-shaped surfaces, which are used to reduce damage to the winding.

Furthermore, an insulating platform is fixed on the outside of the insulating plate, a rectangular cavity is opened inside the insulating platform, two sides of the rectangular cavity pass through the insulating platform, a rectangular block is slidably clamped in the rectangular cavity, a strong spring is fixed at the lower end of the rectangular block, and the other end of the strong spring is welded to the rectangular cavity, and the strong spring is used to pull the rectangular block inward;

The insulating platform is provided with three supporting shafts on one side facing inwards. The supporting shafts point to the axis of the stack and are used to support the windings.

Furthermore, two of the support shafts are fixed on the insulating platform, and another support shaft passes through the rectangular cavity and is fixed to the rectangular block, wherein the support shaft passing through the rectangular cavity is located in the middle of the other two support shafts, and the winding passes through the three support shafts in a snake shape.

Furthermore, the outer end of the support shaft is integrally provided with a bending portion, and the bending portion is used to block the winding.

Furthermore, the outer wall of the support shaft has protrusions and recesses distributed at intervals, the outer side surfaces of the protrusions and the inner side surfaces of the recesses are both arc-shaped, and the edges of the protrusions and the recesses are connected to each other for clamping the winding.

Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention supports the winding through three support shafts, the middle support shaft presses the winding downward, and the two surrounding support shafts support the winding, so that the winding is in a taut state, which can effectively fix and support the coil winding, prevent it from being displaced or loosened due to vibration or other external forces during operation, help reduce the relative movement between the winding and the stator core, reduce wear, thereby extending the service life of the motor, and further reducing noise;

In addition, when the winding coil is wound onto the laminate, it is squeezed with the partition tube 1 and the partition tube 2 to ensure that the partition tube 1 and the partition tube 2 are in a matched state. The partition layer 1 and the partition layer 2 further prevent the winding from contacting the laminate, making it easier to install the insulating component into the stator without the need for position adjustment and fixation, thereby ensuring the isolation effect.

Furthermore, the winding is inserted through the protruding part and the recessed part to ensure the relative position relationship between the winding and the stator core, avoid displacement or misalignment of the winding during the operation of the motor, enhance the stability of the stator winding, and prevent loosening or falling off.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

Fig. 1 is a schematic diagram of the overall structure of the present invention;

FIG2 is a schematic diagram of a rivet penetration structure of the present invention;

FIG3 is a schematic diagram of the structure of the insulating component of the present invention;

FIG. 4 is a schematic diagram of the insulating component separation structure of the present invention.

FIG. 5 is a schematic diagram of the structure of the overlapping state of the spacer tube 1 and the spacer tube 2 of the present invention.

FIG. 6 is a schematic diagram of the support structure of the present invention.

FIG. 7 is a schematic diagram of the structure of the insulating plate of the present invention.

FIG8 is a schematic diagram of the inner structure of the insulating platform of the present invention.

FIG. 9 is a schematic diagram of a partial structure of a support shaft of the present invention.

In the figure: 1. laminate; 11. rivet; 12. protrusion; 13. stator slot; 2. insulating component; 21. partition layer 1; 22. partition layer 2; 23. partition tube 1; 24. partition tube 2; 3. support portion; 31. insulating plate; 311. T-shaped end; 312. arc surface; 32. insulating platform; 321. rectangular cavity; 322. strong spring; 323. rectangular block; 33. support shaft; 331. bending portion; 332. protrusion; 333. recessed portion; 4. winding.

DETAILED DESCRIPTION

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

Please refer to Figures 1-9. The present invention provides a technical solution: a stator winding insulation structure of a concentrated winding, comprising: a laminate 1, an insulating component 2 and a support portion 3;

The stack 1 is provided with a plurality of sheets, and the plurality of sheets of stack 1 are arranged in a superimposed manner. The inner side of the plurality of stacked sheets of stack 1 has a stator slot 13, and the side of the stator slot 13 has a protrusion 12. Rivets 11 for fixing are provided between the plurality of stacked sheets of stack 1. As shown in FIG2 , the rivet 11 penetrates the stack 1, the insulating component 2 and the supporting portion 3. It should be noted that the rivet 11 firmly connects different stator sheets or components together by riveting to form a complete stator structure. This connection method is simpler and faster than welding, bonding and other methods, and the connection effect is more solid. In addition, the fixing effect of the rivet 11 can significantly enhance the overall strength of the stator structure, ensuring that the stator can withstand various forces and vibrations without deformation or damage during the operation of the motor;

The insulating component 2 is arranged in the stator slot 13 to separate the lamination 1 and the winding 4. The primary function of the insulating component 2 is to isolate the direct contact between the conductor in the stator winding, such as copper wire or aluminum wire, and the stator core or other conductive parts to prevent current leakage and short circuit, thereby ensuring the electrical safety of the motor.

There are several groups of support parts 3 , which are respectively arranged at two ends of the assembled laminate 1 to stretch the winding 4 .

As shown in FIG4 , in order to facilitate fixing the insulating component 2 to the stator, the insulating component 2 includes a first partition layer 21, a second partition layer 22, a first partition tube 23 and a second partition tube 24;

The partition layer 1 21 and the partition layer 22 are respectively arranged at the two ends of the stacked laminate 1, and the partition layer 1 21 and the partition layer 22 are limited by the rivet 11, the partition tube 1 23 and the partition tube 2 24 are respectively fixed on the opposite side of the partition layer 1 21 and the partition layer 2 22, and the partition tube 1 23 and the partition tube 2 24 are sleeved. The partition tube 1 23 and the partition tube 2 24 extend into the stator slot 13 and fit with the inner wall of the stator slot 13, wherein the partition layer 1 21 and the partition layer 2 22 are respectively moved from both sides to the stacked laminate 1, and the partition tube 1 23 and the partition tube 2 24 are sleeved to complete the installation, the winding 4 is squeezed by the partition tube 1 23 and the partition tube 2 24, and can avoid falling off even in the absence of the rivet 11, and each stator slot 13 can be blocked by the partition tube 1 23 and the partition tube 2 24.

The materials of the partition layer 1 21 , the partition layer 22 , the partition tube 1 23 and the partition tube 2 24 are all insulating slot paper to achieve the insulation effect. As shown in FIG. 5 , the partition tube 1 23 and the partition tube 2 24 are overlapped and wrapped to cover the inner side of the stator slot 13 .

As shown in Figure 7, the support part 3 includes an insulating plate 31 respectively bonded to the interlayer 1 21 and the interlayer 2 22, and the rivet 11 penetrates the insulating plate 31 in the support part 3. The inner side of the insulating plate 31 has an integrally arranged T-shaped end 311, and the T-shaped end 311 overlaps with the protrusion 12. The side corners of the T-shaped end 311 are arc-shaped surfaces 312, which are used to reduce damage to the winding 4. During the installation of the winding 4, it will be squeezed with the edge of the T-shaped end 311. If the edge of the T-shaped end 311 is acute, it will generate a relatively large squeezing force on the winding 4, causing damage to the insulating layer to a certain extent. The side corners of the T-shaped end 311 are arc-shaped surfaces 312, even if they are squeezed with the winding 4, they will not damage the winding 4.

An insulating platform 32 is fixed to the outside of the insulating plate 31, and a rectangular cavity 321 is opened inside the insulating platform 32. Both sides of the rectangular cavity 321 penetrate the insulating platform 32. A rectangular block 323 is slidably clamped in the rectangular cavity 321. A strong spring 322 is fixed to the lower end of the rectangular block 323, and the other end of the strong spring 322 is welded to the rectangular cavity 321. The strong spring 322 is used to pull the rectangular block 323 inward. It should be noted that the strong spring 322 in the figure is in a stretched state, and in the restored state, the strong spring 322 is in a contracted state;

Three support shafts 33 are provided on the inner side of the insulating platform 32, and the support shafts 33 point to the axis of the stack 1. The support shafts 33 are used to support the winding 4. When the support shafts 33 support the winding 4, the winding 4 first passes through the upper end of the support shafts 33, then passes through the lower end of the next support shaft 33, and then passes through the upper end of the next support shaft 33. The middle support shaft 33 is used to squeeze the winding 4 downward so that the two support shafts 33 at the edge support the winding 4.

Two support shafts 33 are fixed on the insulating platform 32, and another support shaft 33 passes through the rectangular cavity 321 and is fixed to the rectangular block 323, wherein the support shaft 33 passing through the rectangular cavity 321 is located in the middle of the other two support shafts 33, wherein the winding 4 passes through the three support shafts 33 in a snake shape. It should be noted that the middle support shaft 33 can only move up and down, so that the support shaft 33 squeezes the winding 4.

The outer end of the support shaft 33 is integrally provided with a bending portion 331, which is used to block the winding 4 so that the winding 4 is connected and tightened, which can effectively fix and support the coil winding to prevent it from being displaced or loosened due to vibration or other external forces during operation, and avoid separation from the support shaft 33.

The outer wall of the support shaft 33 has protrusions 332 and recesses 333 distributed at intervals. The outer side surface of the protrusion 332 and the inner side surface of the recess 333 are both arc-shaped, and the edges of the protrusion 332 and the recess 333 are connected to each other, which are used to clamp the winding 4 so that the position of the coil winding on the support shaft 33 remains unchanged without movement. The limiting design of the protrusion 332 and the recess 333 makes it easier to achieve precise positioning of the stator winding during the wire embedding process, reducing errors and defective rates in the manufacturing process.

The working principle of the present invention is as follows: the stator is the stationary part of the motor or generator, and is composed of three parts: the stator core, the stator winding and the frame. When current is passed through the stator winding, a rotating magnetic field is generated around the stator core. This rotating magnetic field is the basis for the operation of the motor or generator. It interacts with the rotor to drive the rotor to rotate or generate electrical energy. The stator core is often stacked in a laminated manner, and many laminates 1 are made of silicon steel sheets. Silicon steel sheets are a kind of soft magnetic material with high magnetic permeability and low coercive force. They can generate high magnetic induction intensity under a relatively low external magnetic field, and as the external magnetic field increases, the magnetic induction intensity quickly reaches saturation.

In addition, in the stator, the insulating component 2 of the winding 4 is to protect the wires in the stator winding and prevent current leakage. The insulating component 2 is first inserted into the stator slot 13 to cover the inner wall of the stator slot 13. When the coil of the winding 4 is wound on the laminate 1, it can be squeezed with the partition tube 1 23 and the partition tube 2 24 to ensure that the partition tube 1 23 and the partition tube 2 24 are in a matching state. In addition, the two ends of the stator are provided with a partition layer 1 21 and a partition layer 2 22 respectively to further prevent the winding 4 from contacting the laminate 1. In addition, the partition layer 1 21 and the partition layer 2 22 at the two ends can also be limited, which is convenient for the insulating component 2 to be installed in the stator without the need for position adjustment and fixation, ensuring the isolation effect.

In the stator, especially the stator part of the AC motor or the DC motor, in order to ensure that the current flows normally in the wire without short circuit or leakage, a series of structural arrangements and materials are used to insulate the stator winding, that is, the coil wound on the stator core, wherein each wire in the stator winding is wrapped with a layer of insulating material, such as enameled wire, paper-wrapped wire, etc., to prevent direct contact between the wires. However, during the use of the motor, the winding 4 may become partially loose, and the coil in the winding 4 is passed through the three support shafts 33 in a snake shape, so that the three support shafts 33 support the winding 4, but before the winding 4 passes through the support shafts 33, it is strongly The force spring 322 is in a contracted recovery state, and the force spring 322 needs to be pulled outward to stretch the force spring 322 so that the three support shafts 33 are relatively flush. Under the action of the three support shafts 33, the middle support shaft 33 squeezes the winding 4 downward, and the two surrounding support shafts 33 support the winding 4, so that the winding 4 is in a taut state, which can effectively fix and support the coil winding to prevent it from being displaced or loosened due to vibration or other external forces during operation, which helps to reduce the relative movement between the winding 4 and the stator core and reduce wear, thereby extending the service life of the motor and further reducing noise.

In addition, the winding 4 is inserted through the protrusion 332 and the recessed portion 333, which helps to ensure the relative position relationship between the winding 4 and the stator core, and avoids displacement or misalignment of the winding 4 during the operation of the motor. The limit design can enhance the stability of the stator winding and prevent it from loosening or falling off due to vibration or other external forces during the operation of the motor. The outer side surface of the protrusion 332 and the inner side surface of the recessed portion 333 are both arc-shaped, which avoids damage to the surface of the winding 4 during squeezing with the winding 4.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. 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.

Claims (8)

1. A stator winding insulation structure of concentrated windings, comprising:

the laminated structure comprises a laminated layer (1), a plurality of sheets, a plurality of rivets (11) and a plurality of connecting plates, wherein the laminated layer (1) is in superposition arrangement, a stator groove (13) is formed in the inner side of the laminated layer (1) with the plurality of sheets superposed, a protruding part (12) is formed on the side edge of the stator groove (13), and the rivets (11) used for fixing are penetrated between the laminated layers (1) with the plurality of sheets superposed;

an insulating member (2) provided in the stator slot (13) for separating the laminate (1) and the winding (4);

The support parts (3) are provided with a plurality of groups, and the support parts (3) of the groups are respectively arranged at two end parts of the combined laminated layer (1) and are used for stretching the windings (4).

2. The concentrated winding stator winding insulation structure of claim 1, wherein: the insulating component (2) comprises a first interlayer (21), a second interlayer (22), a first insulating pipe (23) and a second insulating pipe (24);

The first interlayer (21) and the second interlayer (22) are respectively arranged at two ends of the laminated layer (1), the first interlayer (21) and the second interlayer (22) are limited by rivets (11), the first interlayer (23) and the second interlayer (24) are respectively fixed at one opposite sides of the first interlayer (21) and the second interlayer (22), the first interlayer (23) and the second interlayer (24) are in sleeved connection, and the first interlayer (23) and the second interlayer (24) extend into the stator groove (13) and are attached to the inner wall of the stator groove (13).

3. The concentrated winding stator winding insulation structure of claim 2, wherein: the first interlayer (21), the second interlayer (22), the first isolation pipe (23) and the second isolation pipe (24) are made of insulating groove paper.

4. The concentrated winding stator winding insulation structure of claim 2, wherein: the utility model discloses a winding, including supporting part (3), including insulating board (31) with interlayer one (21) and interlayer two (22) laminating respectively, insulating board (31) in supporting part (3) are run through in rivet (11), insulating board (31) inboard has T shape end (311) of an organic whole setting, T shape end (311) overlap with protruding portion (12), the side corner of T shape end (311) is arcwall face (312) for reduce the damage to winding (4) production.

5. The concentrated winding stator winding insulation structure of claim 4 wherein: an insulating table (32) is fixed on the outer side of the insulating plate (31), a rectangular cavity opening (321) is formed in the insulating table (32), two sides of the rectangular cavity opening (321) penetrate through the insulating table (32), a rectangular block (323) is arranged in the rectangular cavity opening (321) in a sliding manner, a powerful spring (322) is fixed at the lower end of the rectangular block (323), the other end of the powerful spring (322) is welded with the rectangular cavity opening (321), and the powerful spring (322) is used for inwards pulling the rectangular block (323);

three support shafts (33) are arranged on the inward side of the insulating table (32), the support shafts (33) point to the axis of the laminated layer (1), and the support shafts (33) are used for supporting the windings (4).

6. The concentrated winding stator winding insulation structure of claim 5, wherein: two supporting shafts (33) are fixed on an insulating table (32), the other supporting shaft (33) penetrates through a rectangular cavity opening (321) and is fixed with a rectangular block (323), the supporting shaft (33) penetrating through the rectangular cavity opening (321) is located in the middle of the other two supporting shafts (33), and the winding (4) penetrates through the three supporting shafts (33) in a serpentine shape.

7. The concentrated winding stator winding insulation structure of claim 6 wherein: the outer end of the supporting shaft (33) is integrally provided with a bending part (331), and the bending part (331) is used for blocking the winding (4).

8. The concentrated winding stator winding insulation structure of claim 6 wherein: the outer wall of the supporting shaft (33) is provided with protruding portions (332) and recessed portions (333) which are distributed at intervals, the outer side faces of the protruding portions (332) and the inner side faces of the recessed portions (333) are arc-shaped, and the edges of the protruding portions (332) and the edges of the recessed portions (333) are connected with each other and used for clamping the winding (4).