Slot insulation structure for motor stator

Abstract

The application relates to the technical field of motor stators, and discloses a slot insulation structure of a motor stator, which comprises a stator, the inner wall of the stator is provided with a group of slot openings arranged along the axial direction of the stator, the group of slot openings are arranged in a ring shape at equal distances, and each slot opening is provided with an insulation piece inserted along the length direction of the slot opening. The slot insulation structure of the motor stator inserts the U-shaped insulation piece with limiting protrusions on two sides into the slot opening of the stator, limiting grooves are formed in the two inner side walls of the slot opening and are connected with the limiting protrusions, the insulation piece is conveniently inserted by utilizing the elastic deformation characteristics of the insulation piece, the displacement of the insulation piece along the axial direction of the stator is effectively limited by the connection between the limiting protrusions and the limiting grooves after the insertion, and the problem of the decline of the electrical insulation performance caused by the displacement of the insulation piece in the subsequent winding process is avoided, so that the safety and stability of the motor operation are ensured.

Description

Technical Field

[0001] This application relates to the field of motor stator technology, specifically to the slot insulation structure of motor stators. Background Technology

[0002] In the motor manufacturing process, the stator is an important component of the motor, and its performance directly affects the overall operation of the motor. Before the winding, insulating paper is usually inserted into the slot of the stator to achieve electrical insulation between the stator slot and the winding, so as to ensure the safe and stable operation of the motor.

[0003] Currently, the traditional method of stator slot insulation mainly involves inserting insulating paper into the slot opening and relying on the friction between the insulating paper and the inner wall of the slot opening to fix the insulating paper. During the winding process, the winding operation will generate tension and pressure on the insulating paper in various directions, which can easily cause axial displacement of the insulating paper, affecting the insulation effect. This reduces the electrical insulation performance between the winding and the stator slot, increases the risk of motor faults such as short circuits, and may also cause the insulating paper to accumulate or wrinkle in the slot opening, interfering with the normal embedding and arrangement of the winding, thereby affecting the assembly accuracy and operating performance of the motor. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a slot insulation structure for motor stators, which has advantages such as preventing misalignment and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a slot insulation structure for a motor stator, including a stator, wherein the inner wall of the stator is provided with a set of slots arranged along its axial direction, the set of slots being arranged in a ring at equal intervals, and each slot having an insulating component inserted into it along its length.

[0006] Each insulating component has a limiting protrusion fixedly connected to both sides along its length. The insulating component has a U-shaped structure. Each slot has a limiting groove on both inner sidewalls along its length. Each limiting protrusion is engaged with its corresponding limiting groove. The length of the limiting groove is less than the length of the stator and equal to the length of the limiting protrusion.

[0007] Each slot has a blocking part on both inner sidewalls at the end closest to the stator center, and the distance between the two inner sidewalls of each slot gradually decreases from the inside to the outside.

[0008] Furthermore, the stator is made of multiple silicon steel sheets stacked together, with multiple anchors inserted between the silicon steel sheets.

[0009] The above solution strengthens the connection between multiple silicon steel sheets by inserting anchors, preventing the silicon steel sheets from loosening during motor operation and ensuring the stability of the stator structure.

[0010] Furthermore, both ends of each insulating element are rounded.

[0011] The above solution can prevent the ends of the insulation from rubbing against the winding wires during winding, thus preventing damage to the winding wires and ensuring winding quality.

[0012] Furthermore, each of the insulating components comprises, from the inside out, a high-temperature resistant layer, a substrate layer, and a wear-resistant layer.

[0013] Through the above solutions, the high-temperature resistant layer can effectively resist the high temperatures generated during motor operation, preventing high temperatures from adversely affecting the insulation performance; the substrate layer has good insulation performance and mechanical strength, providing stable structural support for the insulation components and ensuring that they maintain shape and performance stability under complex working conditions; the wear-resistant layer has excellent wear resistance and self-lubricating properties, which can reduce friction with the winding wires during winding, reduce the risk of damage to the winding wires, and extend the service life of the insulation components themselves, ensuring the reliability and stability of the insulation components during motor operation.

[0014] Furthermore, the high-temperature resistant layer is made of polyimide material.

[0015] The above solution can withstand the high temperatures generated during motor operation, preventing the insulation performance from deteriorating due to high temperatures.

[0016] Furthermore, the substrate layer is made of glass fiber cloth reinforced epoxy resin composite material.

[0017] The above solution provides good insulation performance and mechanical strength, offering stable structural support for insulating components.

[0018] Furthermore, the wear-resistant layer is made of polytetrafluoroethylene.

[0019] The above solution has excellent wear resistance and self-lubricating properties, which can reduce friction between the insulation and the winding wire during the winding process and extend the service life of the insulation components.

[0020] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0021] The slot insulation structure of this motor stator uses a U-shaped insulating component with limiting protrusions on both sides to be inserted into the stator slot. Limiting grooves are opened on the two inner side walls of the slot to engage with the limiting protrusions. The insertion is made convenient by utilizing the elastic deformation characteristics of the insulating component itself. After insertion, the engagement between the limiting protrusions and the limiting grooves effectively limits the displacement of the insulating component along the stator axis. This avoids the problem of reduced electrical insulation performance caused by the displacement of the insulating component during subsequent winding, and ensures the safety and stability of motor operation.

[0022] A blocking part is set on the two inner sidewalls at one end of each slot near the center of the stator, and the distance between the two inner sidewalls of the slot gradually decreases from the inside to the outside. This achieves the blocking of both ends of the U-shaped insulation and ensures the symmetry of the limiting protrusion, which makes it easy for the limiting protrusion to be accurately inserted into the limiting groove, improves the installation accuracy and stability, and avoids its radial displacement.

[0023] The insulation component has rounded ends to prevent scratching of the winding wires during winding, thus ensuring winding quality. The insulation component is composed of a high-temperature resistant layer, a base material layer, and a wear-resistant layer from the inside out. The material properties of each layer enable it to resist high temperatures, provide stable structural support, and reduce friction with the winding wires, thereby extending the service life of the insulation component. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application;

[0025] Figure 2 This is a stator structure diagram of this application;

[0026] Figure 3 This is a perspective view of the stator structure of this application;

[0027] Figure 4 This is a perspective view of the insulating component structure of this application;

[0028] Figure 5 This is a structural diagram of the insulating component in this application.

[0029] In the picture:

[0030] 1. Stator; 2. Slot; 3. Insulating component; 4. Limiting protrusion; 5. Limiting groove; 6. Blocking part; 7. Anchor; 8. High temperature resistant layer; 9. Substrate layer; 10. Wear-resistant layer. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figures 1-5The slot insulation structure of the motor stator in this embodiment includes a stator 1. The inner wall of the stator 1 has a set of slots 2 arranged along its axial direction. The set of slots 2 are arranged in a ring at equal intervals. Each slot 2 is inserted with an insulating component 3 along its length. The stator 1 is made of multiple silicon steel sheets stacked together. Multiple anchors 7 are inserted between the multiple silicon steel sheets. The anchors 7 are used to fix the multiple silicon steel sheets, enhance the connection strength between the multiple silicon steel sheets, prevent the silicon steel sheets from loosening during motor operation, and ensure the stability of the stator 1 structure.

[0033] Each insulating component 3 has a fixedly connected limiting protrusion 4 along its length on both sides. The insulating component 3 has a U-shaped structure. Each slot 2 has a limiting groove 5 on its two inner sidewalls along its length. Each limiting protrusion 4 is engaged with its corresponding limiting groove 5. The length of the limiting groove 5 is less than the length of the stator 1, and the length of the limiting groove 5 is equal to the length of the limiting protrusion 4. With the above arrangement, when the insulating component 3 is inserted into the slot 2, the outer surface of the insulating component 3 is pinched to bring the interiors closer together. The elastic deformation characteristics of the insulating component 3 make it easier to insert the insulating component 3. After insertion, the insulating component 3 resets and drives the limiting protrusion 4 to engage in the corresponding limiting groove 5. This prevents the insulating component 3 from displacing along the axial direction of the stator 1 during subsequent winding, effectively preventing the problem of reduced electrical insulation performance caused by the displacement of the insulating component 3.

[0034] Each slot 2 has a blocking part 6 on both inner sidewalls at the end closest to the center of the stator 1. The distance between the two inner sidewalls of each slot 2 gradually decreases from the inside to the outside. By setting the blocking part 6, the two ends of the U-shaped insulating part 3 can be blocked to prevent the insulating paper from shifting radially along the stator 1. At the same time, by limiting the two ends of the insulating part 3, the two limiting protrusions 4 can be ensured to be symmetrical, which makes it easier for the subsequent limiting protrusions 4 to accurately fit into the limiting groove 5, thereby improving the installation accuracy and stability.

[0035] Each insulating component 3 has rounded ends to prevent scratching of the winding wires during winding, thus preventing damage and ensuring winding quality. Each insulating component 3 comprises, from the inside out, a high-temperature resistant layer 8, a substrate layer 9, and a wear-resistant layer 10. The high-temperature resistant layer 8 effectively resists the high temperatures generated during motor operation, preventing adverse effects on insulation performance. The substrate layer 9 possesses excellent insulation performance and mechanical strength, providing stable structural support for the insulating component 3 and ensuring its shape and performance stability under complex operating conditions. The wear-resistant layer 10 has excellent wear resistance and self-lubricating properties, reducing friction between the insulating component 3 and the winding wires during winding. The friction of the wires reduces the risk of damage to the winding wires and extends the service life of the insulation component 3 itself, ensuring the reliability and stability of the insulation component 3 during motor operation. The high-temperature resistant layer 8 is made of polyimide material, which can withstand the high temperature generated during motor operation and prevent the insulation performance from deteriorating due to high temperature. The substrate layer 9 is made of glass fiber cloth reinforced epoxy resin composite material, which has good insulation performance and mechanical strength, providing stable structural support for the insulation component 3. The wear-resistant layer 10 is made of polytetrafluoroethylene material, which has excellent wear resistance and self-lubricating properties, which can reduce friction with the winding wires during winding and extend the service life of the insulation component 3.

[0036] The working principle of the above embodiment is as follows: First, during the manufacturing and winding preparation stage of the motor stator 1, since the inner wall of the stator 1 has annularly spaced axial slots 2, during installation, because the insulating part 3 is U-shaped and has limiting protrusions 4 on both sides along the length direction, the operator pinches the outer surface of the insulating part 3 and uses its own elastic deformation characteristics to bring the inside of the insulating part 3 closer together, so that the insulating part 3 can be smoothly inserted into the slot 2. During the insertion process, the blocking parts 6 on the two inner side walls near the center of the slot 2 of the stator 1, and the gradually decreasing distance between the two inner side walls from the inside to the outside, will affect the U-shaped insulating part 3. The two ends form a barrier and limit, which can prevent the insulation part 3 from displacing radially along the stator 1, and also ensure that the two limit protrusions 4 are symmetrical, so as to accurately position it for subsequent insertion into the limit groove 5. When the insulation part 3 is inserted into place, it will elastically reset itself. At this time, the limit protrusion 4 will be inserted into the corresponding limit groove 5 on the two inner side walls of the slot 2. Since the length of the limit groove 5 is less than the length of the stator 1 and equal to the length of the limit protrusion 4, the problem of decreased electrical insulation performance caused by displacement of the insulation part 3 is prevented during the subsequent winding process. At the same time, the arc setting at both ends of the insulation part 3 can prevent the winding wire from being scratched during winding, thus ensuring the winding quality.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A slot insulation structure for a motor stator, comprising a stator (1), characterized in that: The inner wall of the stator (1) is provided with a set of slots (2) arranged along its axial direction. The set of slots (2) are arranged in a ring at equal intervals. Each slot (2) is connected to an insulating component (3) along its length direction. Each insulating component (3) has a limiting protrusion (4) fixedly connected to both sides along its length direction. The insulating component (3) has a U-shaped structure. Each slot (2) has a limiting groove (5) opened on both inner sidewalls along its length direction. Each limiting protrusion (4) is engaged with its corresponding limiting groove (5). The length of the limiting groove (5) is less than the length of the stator (1). The length of the limiting groove (5) is equal to the length of the limiting protrusion (4). Each slot (2) has a blocking part (6) on one of its two inner sidewalls near the center of the stator (1), and the distance between the two inner sidewalls of each slot (2) gradually decreases from the inside to the outside.

2. The slot insulation structure of the motor stator according to claim 1, characterized in that: The stator (1) is made of multiple silicon steel sheets stacked together, and multiple anchors (7) are inserted between the multiple silicon steel sheets.

3. The slot insulation structure of the motor stator according to claim 1, characterized in that: Each of the insulating elements (3) has rounded ends.

4. The slot insulation structure of the motor stator according to claim 1, characterized in that: Each of the insulating components (3) comprises, from the inside out, a high-temperature resistant layer (8), a substrate layer (9), and a wear-resistant layer (10).

5. The slot insulation structure of the motor stator according to claim 4, characterized in that: The high-temperature resistant layer (8) is made of polyimide material.

6. The slot insulation structure of the motor stator according to claim 4, characterized in that: The substrate layer (9) is made of glass fiber cloth reinforced epoxy resin composite material.

7. The slot insulation structure of the motor stator according to claim 4, characterized in that: The wear-resistant layer (10) is made of polytetrafluoroethylene.

Images