A stator shield sleeve

Abstract

This utility model relates to the field of motor rotor manufacturing technology, and particularly to a stator shielding sleeve. The stator shielding sleeve includes a sleeve portion and a bearing, with the bearing disposed at one end inside the sleeve portion. The sleeve portion consists of an inner layer and a carbon fiber outer layer from the inside out. The inner layer directly covers and fixes the bearing, forming an embedded support structure for the bearing. The carbon fiber outer layer is a structure formed by winding resin-impregnated carbon fiber tape. By directly covering and fixing the bearing with the inner layer to form an embedded support structure, the stability and positioning accuracy of the bearing installation can be effectively improved. The outer carbon fiber layer, formed by winding resin-impregnated carbon fiber tape, significantly reduces the overall structural weight while enabling the stator shielding sleeve to stably support the centrifugal force and alternating load generated by the high-speed rotation of the rotor, and to withstand complex high-temperature and high-pressure operating conditions. The synergistic cooperation of the inner and outer layers achieves an organic unity of structural strength, stability, and lightweight.

Description

Technical Field

[0001] This utility model relates to the field of motor rotor manufacturing technology, and in particular to a stator shielding sleeve. Background Technology

[0002] As a crucial protective component for the motor rotor, the stator shielding sleeve's performance directly impacts the motor's overall energy efficiency and operational stability. Currently, stator shielding sleeves are mostly manufactured from stainless steel using a stamping process. While this provides a certain level of mechanical strength and corrosion resistance, it presents significant drawbacks in practical applications. Due to the electrical conductivity of stainless steel, severe eddy current losses occur during high-speed motor operation, leading to reduced energy conversion efficiency and making it difficult to meet the development requirements of high-efficiency motors. Furthermore, the traditional stamping process results in a simple shielding sleeve structure, making it difficult to balance lightweight design with high strength requirements, further limiting its application in high-end motors.

[0003] To address the aforementioned issues, those skilled in the art urgently need a novel stator shielding structure that can reduce eddy current losses while improving overall performance, in order to adapt to the technological development trend of high-efficiency and energy-saving motors. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a stator shielding sleeve, including a sleeve portion and a bearing, with the bearing disposed at one end inside the sleeve portion; the sleeve portion consists of an inner layer and a carbon fiber outer layer from the inside to the outside, the inner layer directly covers and fixes the bearing, forming an embedded support structure for the bearing; the carbon fiber outer layer is a structure formed by winding resin-impregnated carbon fiber tape.

[0005] Based on the above scheme, the inner layer further includes a cylindrical portion and an end portion; the cylindrical portion of the inner layer is wrapped with a carbon fiber tape impregnated with resin, while the end portion is not wrapped with a carbon fiber tape.

[0006] Based on the above scheme, the resin is further selected from epoxy resin or polyimide resin.

[0007] Furthermore, based on the above scheme, the inner layer is made of thermoplastic material.

[0008] Furthermore, based on the above scheme, the thermoplastic material is a fiber-reinforced thermoplastic material.

[0009] Furthermore, based on the above scheme, the carbon fiber outer layer is a seamless integral sleeve structure.

[0010] Based on the above scheme, the inner layer and the carbon fiber outer layer are further integrated into a single structure through injection molding.

[0011] Based on the above scheme, furthermore, the resin of the outer layer of the carbon fiber forms an adhesive bond with the carbon fiber tape and the inner layer, so that the outer layer and the inner layer are combined into one.

[0012] Based on the above scheme, the thickness of the inner layer end is further greater than the thickness of the cylindrical part of the stator shield sleeve.

[0013] Compared with existing technologies, the stator shielding sleeve provided by this utility model directly covers and fixes the bearing to form an embedded support structure, which can effectively improve the stability and positioning accuracy of bearing installation, reduce the running deviation caused by bearing loosening or displacement, and ensure the reliable operation of the rotor system. The outer carbon fiber layer formed by winding resin-impregnated carbon fiber tape fully utilizes the high strength and lightweight characteristics of carbon fiber material. While significantly reducing the overall structural weight, it endows the outer layer with excellent tensile strength, fatigue resistance and corrosion resistance. This allows the stator shielding sleeve to stably support the centrifugal force and alternating load generated by the high-speed rotation of the rotor, while withstanding complex high-temperature and high-pressure working conditions. The synergistic cooperation of the inner and outer layers achieves an organic unity of structural strength, stability and lightweight, improving the comprehensive performance and service life of the rotor system. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the overall structure of the stator shielding sleeve provided by this utility model;

[0016] Figure 2 A schematic diagram of the internal structure of the stator shielding sleeve provided by this utility model;

[0017] Figure 3 A schematic diagram of the carbon fiber tape winding impregnated with resin for the stator shielding sleeve provided by this utility model.

[0018] Figure label:

[0019] 10-Bearing; 20-Inner layer; 21-Cylindrical portion; 22-End;

[0020] 30 - Carbon fiber outer layer. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] To address the technical problem in the prior art where the conductivity of stainless steel materials leads to severe eddy current losses during high-speed motor operation, resulting in reduced energy conversion efficiency, this utility model provides a stator shielding sleeve.

[0024] like Figure 1-2 As shown, the stator shielding sleeve includes a sleeve portion and a bearing 10, with the bearing 10 disposed at one end inside the sleeve portion. The sleeve portion consists of an inner layer 20 and a carbon fiber outer layer 30, arranged sequentially from the inside to the outside. The inner layer directly covers and fixes the bearing 10, forming an embedded support structure for the bearing 10. The carbon fiber outer layer 30 is a structure formed by winding resin-impregnated carbon fiber tape. The stator shielding sleeve described in this solution significantly improves the overall performance of the motor rotor through the synergistic design of the inner layer 20, the bearing 10, and the carbon fiber outer layer 30. Specifically:

[0025] The inner layer 20 directly covers and fixes the bearing 10, forming an embedded support structure for the bearing 10. Specifically, by adopting this scheme, the inner layer 20 directly covers the bearing 10 to form an embedded support structure, which prevents the bearing 10 from shifting or loosening during high-speed operation and improves operational reliability.

[0026] The carbon fiber outer layer 30 is disposed around the inner layer 20; the carbon fiber outer layer 30 is a structure formed by winding resin-impregnated carbon fiber tape.

[0027] Specifically, using the above solution, the carbon fiber outer layer 30 adopts a composite structure of non-conductive carbon fiber material and resin, which fundamentally avoids the eddy current loss caused by the conductivity of traditional stainless steel materials, thereby improving the energy efficiency of the motor. In addition, the sleeve assembly formed by the winding of carbon fiber tape has both high specific strength and lightweight characteristics, which reduces the overall weight of the rotor while ensuring mechanical strength, making it suitable for high-speed motor scenarios. Resin impregnation makes the carbon fiber outer layer form a dense protective layer, effectively isolating external moisture, dust and other corrosion, and extending the service life of the shielding sleeve.

[0028] In one embodiment, such as Figure 2 and Figure 3 As shown, the inner layer 20 includes a cylindrical portion 21 and an end portion 22; the cylindrical portion 21 of the inner layer 20 is wrapped with a carbon fiber tape impregnated with resin, while the end portion 22 is not wrapped with a carbon fiber tape.

[0029] Specifically, this solution uses a differentiated winding design between the inner cylindrical part 21 and the end part 22 to optimize the structural strength for different areas of the stator shielding sleeve, while ensuring the torsional performance of the cylindrical part 21 and reducing the weight of the end part 22 or enhancing local sealing, thus achieving a balance between lightweight and functionality.

[0030] It should be noted that the method of winding the inner layer 20 with carbon fiber tape is existing technology. Those skilled in the art can refer to the Chinese invention patent with application publication number CN102474151A for the setting, and will not be elaborated here.

[0031] In one embodiment, the resin is selected from epoxy resin or polyimide resin.

[0032] By adopting the above scheme and selecting epoxy resin or polyimide resin as the impregnation material, its high bonding strength, high temperature resistance and fatigue resistance can be fully utilized to ensure the reliability of the interface bonding between the carbon fiber sleeve and the inner layer 20 material under complex working conditions, while improving the overall corrosion resistance and insulation performance of the shielding sleeve.

[0033] It should be noted that epoxy resin or polyimide resin are existing materials. The selection of the resin material includes, but is not limited to, the epoxy resin or polyimide resin provided by this utility model. Other resin materials with high bonding strength can also be selected according to the temperature resistance level.

[0034] In one embodiment, the inner layer 20 is made of a thermoplastic material.

[0035] Specifically, the inner layer 20 is made of thermoplastic material, which not only enables the one-piece molding of complex structures through injection molding, but also gives the shielding sleeve excellent impact resistance and recyclability, simplifying the manufacturing process while reducing material waste.

[0036] It should be noted that thermoplastic materials are existing materials, such as polyethylene, polypropylene, and polystyrene, which can be selected by those skilled in the art according to actual needs.

[0037] In one embodiment, the thermoplastic material is a fiber-reinforced thermoplastic material.

[0038] Specifically, the fiber-reinforced thermoplastic inner layer 20 significantly improves the tensile strength and creep resistance of the inner layer 20 by introducing glass fiber or carbon fiber reinforcement phase, avoiding deformation or cracking caused by centrifugal force during high-speed operation, and enhancing the long-term durability of the shielding sleeve.

[0039] It should be noted that fiber-reinforced thermoplastic materials are existing materials, such as glass fiber reinforced thermoplastic materials, carbon fiber reinforced thermoplastic materials, or aramid fiber reinforced thermoplastic materials, which can be selected by those skilled in the art according to actual needs.

[0040] In one embodiment, such as Figure 2 As shown, the carbon fiber outer layer 30 is a seamless integral sleeve structure.

[0041] Using the above solution, the carbon fiber outer layer 30 adopts a seamless integral sleeve structure, eliminating the weak links of the traditional split splicing structure and improving the radial load-bearing capacity and sealing performance of the sleeve.

[0042] In one embodiment, the inner layer 20 and the carbon fiber outer layer 30 are formed into an integral structure by injection molding.

[0043] Specifically, the inner layer 20 and the carbon fiber outer layer 30 are integrated into a single structure through injection molding, which can effectively prevent delamination or displacement, while simplifying the assembly process and improving production efficiency.

[0044] It should be noted that the injection molding process is a conventional technical means. Here it is used to cover and fix the bearing 10 and initially combine the carbon fiber outer layer 30. Specifically, the bearing 10 and the carbon fiber outer layer are pre-placed in the mold. During the injection molding process, the bearing 10 and the carbon fiber outer layer are fixed by the thermoplastic material inner layer 20.

[0045] In one embodiment, the resin of the outer carbon fiber layer 30 is bonded to the carbon fiber strip and the inner layer 20, so that the outer layer and the inner layer 20 are integrated.

[0046] Specifically, the resin of the carbon fiber outer layer 30 and the thermoplastic inner layer 20 are bonded together. A second injection molding process can be used to form an interface fusion layer between the resin, the carbon fiber strip, and the inner layer 20, so that the resin of the carbon fiber outer layer 30 is melt-bonded to the carbon fiber strip and the inner layer 20.

[0047] In one embodiment, such as Figure 2As shown, the thickness of the end 22 of the inner layer 20 is greater than the thickness of the cylindrical portion 21 of the stator shield sleeve.

[0048] By adopting the above scheme, the design of setting the thickness of the inner layer 20 end 22 to be greater than that of the cylindrical part 21 forms an axially reinforced area through local thickening, thereby enhancing the impact resistance of the shielding sleeve end 22 and the support stability of the bearing 10.

[0049] In summary, the stator shielding sleeve provided by this utility model directly covers and fixes the bearing to form an embedded support structure, which can effectively improve the stability and positioning accuracy of bearing installation, reduce operating deviations caused by bearing loosening or displacement, and ensure the reliable operation of the rotor system. The outer carbon fiber layer formed by winding resin-impregnated carbon fiber tape fully utilizes the high strength and lightweight characteristics of carbon fiber material. While significantly reducing the overall structural weight, it endows the outer layer with excellent tensile strength, fatigue resistance, and corrosion resistance. This allows the stator shielding sleeve to stably support the centrifugal force and alternating load generated by the high-speed rotation of the rotor, while also withstanding complex high-temperature and high-pressure working conditions. The synergistic cooperation between the inner and outer layers achieves an organic unity of structural strength, stability, and lightweight, improving the overall performance and service life of the rotor system.

[0050] Although this document frequently uses terms such as inner layer, bearing, carbon fiber outer cylindrical portion, and end, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A stator shielding sleeve, characterized in that: It includes a sleeve portion and a bearing (10), wherein the bearing (10) is disposed at one end inside the sleeve portion; the sleeve portion consists of an inner layer (20) and a carbon fiber outer layer (30) from the inside to the outside, wherein the inner layer directly covers and fixes the bearing (10) to form an embedded support structure for the bearing (10); the carbon fiber outer layer (30) is a structure formed by winding a resin-impregnated carbon fiber strip.

2. The stator shielding sleeve according to claim 1, characterized in that: The inner layer (20) includes a cylindrical portion (21) and an end portion (22); the cylindrical portion (21) of the inner layer (20) is wound with a carbon fiber tape impregnated with resin.

3. The stator shielding sleeve according to claim 1, characterized in that: The resin is selected from epoxy resin or polyimide resin.

4. The stator shielding sleeve according to claim 1, characterized in that: The inner layer (20) is made of thermoplastic material.

5. The stator shielding sleeve according to claim 4, characterized in that: The thermoplastic material is a fiber-reinforced thermoplastic material.

6. The stator shielding sleeve according to claim 1, characterized in that: The carbon fiber outer layer (30) is a seamless integral sleeve structure.

7. The stator shielding sleeve according to claim 1, characterized in that: The inner layer (20) and the carbon fiber outer layer (30) are formed into an integral structure through injection molding.

8. The stator shielding sleeve according to claim 7, characterized in that: The resin of the outer carbon fiber layer (30) forms an adhesive bond with the carbon fiber tape and the inner layer (20), so that the outer layer and the inner layer (20) are integrated into one.

9. The stator shielding sleeve according to claim 1, characterized in that: The thickness of the end (22) of the inner layer (20) is greater than the thickness of the cylindrical part (21) of the stator shield sleeve.

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