A stator core based on dovetail fitting type square steel fastening structure
Patent Information
- Application Number
- CN202521773561.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-08-20
AI Technical Summary
[0003]本实用新型针对现有叠压成定子铁芯的定子冲片容易发生径向位移与松动以及结构稳定性差等问题，提供一种基于燕尾槽嵌合式方钢紧固结构的定子铁芯
1. 本实用新型通过在定子冲片和定子压圈外边缘设置的卡口燕尾槽处放置长方体状的方钢，方钢与卡口燕尾槽紧密配合，将其用焊接的方式固定，使定子冲片与定子压圈之间形成可靠的机械连接，可有效防止定子冲片在电机运行过程中发生位移或松动，显著增强了定子铁芯的整体稳定性，提高定子铁芯的质量，进而提升电机的性能和可靠性。
Smart Images
Figure CN224817900U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of motor manufacturing technology, specifically relating to a stator core based on a dovetail groove interlocking square steel fastening structure. Background Technology
[0002] In the field of motor manufacturing, the stator, as a core component, has a decisive impact on the overall operating efficiency of the motor. The stator core is typically made by stacking stator laminations, which are stamped from thin silicon steel sheets. This structural design aims to reduce hysteresis and eddy current losses, thereby improving motor efficiency. However, in existing technologies, the common method for fixing stator laminations during the stacking process is to insert slotted rods into the stator core. While this method can maintain the relative position of the stator laminations to some extent, in actual operation, the motor's operating conditions are complex and varied. The stator core must withstand the combined effects of various loads, including electromagnetic forces, mechanical vibrations, and thermal stresses. Because the stator laminations are simply stacked together, under long-term exposure to these complex loads, the slots are prone to radial displacement and loosening. This radial displacement and loosening not only reduces the structural stability of the stator core, causing abnormal vibrations and noise, but also increases energy loss and reduces efficiency. In severe cases, it can even lead to motor failure, affecting the normal operation and service life of the motor. Utility Model Content
[0003] This invention addresses the problems of radial displacement and loosening, as well as poor structural stability, in existing stator laminations that are easily stacked into stator cores. It provides a stator core based on a dovetail groove interlocking square steel fastening structure.
[0004] The present invention adopts the following technical solution: A stator core based on a dovetail groove interlocking square steel fastening structure includes a stator core body, which is formed by stacking several stator laminations in a fan shape. The upper and lower ends of the stacked stator laminations are respectively provided with stator pressure rings. The edges of the stator laminations are provided with several first-type dovetail grooves. The outer edge of the stator pressure rings is provided with several second-type dovetail grooves corresponding to the first-type dovetail grooves of the stator laminations. The channel formed by the first-type dovetail grooves and the second-type dovetail grooves is inlaid with matching square steel.
[0005] Furthermore, the bayonet grooves are arranged at equal intervals.
[0006] Furthermore, the dovetail grooves of the bayonet are arranged at equal intervals.
[0007] Furthermore, the square steel has a cuboid structure.
[0008] Furthermore, the length of the square steel is consistent with the length of the channel formed by the first and second dovetail grooves.
[0009] Furthermore, the square steel is welded to the channel formed by the first and second dovetail grooves.
[0010] Furthermore, the surface of the square steel is provided with several lifting holes for hoisting and transportation.
[0011] The beneficial effects of this utility model are as follows: 1. This utility model places a rectangular square steel bar at the dovetail groove on the outer edge of the stator lamination and stator pressure ring. The square steel bar fits tightly with the dovetail groove and is fixed by welding, forming a reliable mechanical connection between the stator lamination and the stator pressure ring. This effectively prevents the stator lamination from shifting or loosening during motor operation, significantly enhances the overall stability of the stator core, improves the quality of the stator core, and thus improves the performance and reliability of the motor.
[0012] 2. This utility model, through its dovetail groove fitting fixing structure, can ensure a tight fit between stator laminations, reduce problems such as uneven air gaps, thereby improving the quality of the stator core and enhancing the electromagnetic performance and operating efficiency of the motor.
[0013] 3. Square steel structures are simple, easy to install and operate, and do not require complex processing technology and equipment, which can reduce production costs and improve production efficiency. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of the stator core of this utility model; Figure 2 This is a schematic diagram of the stator lamination structure; Figure 3 This is a schematic diagram of the stator pressure ring structure; Figure 4 This is a schematic diagram of the square steel structure; Wherein: 1-Stator lamination; 2-Stator pressure ring; 3-Dovetail groove one; 4-Dovetail groove two; 5-Square steel; 6-Lifting hole. Detailed Implementation
[0015] The present invention will be further described with reference to the accompanying drawings.
[0016] As shown in the figure, a stator core based on a dovetail groove interlocking square steel fastening structure includes a stator core body, which is formed by stacking several stator laminations 1 in a fan shape. The upper and lower ends of the stacked stator laminations 1 are respectively provided with stator pressure rings 2. The edges of the stator laminations 1 are provided with several dovetail grooves 3. The outer edge of the stator pressure rings 2 is provided with several dovetail grooves 4 corresponding to the dovetail grooves 3 of the stator laminations 1. The channel formed by the dovetail grooves 3 and the dovetail grooves 4 is inlaid with matching square steel 5.
[0017] The length of the square steel 5 is the same as the length of the channel formed by the first dovetail groove 3 and the second dovetail groove 4.
[0018] The manufacturing method of this utility model is as follows: First, according to the motor design requirements, select appropriate silicon steel sheets to make stator lamination 1, and process a specific size dovetail groove 3 on the outer edge of stator lamination 1 through stamping and other processing techniques; at the same time, manufacture stator pressure ring 2 according to the design requirements, and process a dovetail groove 4 on its outer edge that corresponds to the dovetail groove 3 of stator lamination 1.
[0019] Multiple processed stator laminations 1 are stacked together in sequence, ensuring that the stacking direction and dimensions meet the design requirements. Then, the stator pressure ring 2 is placed on top of the stacked stator laminations 1.
[0020] Place the stacked stator laminations 1 and stator pressure rings 2 on the press worktable, adjust the press parameters, and apply appropriate pressure to ensure that the stator laminations 1 and stator pressure rings 2 fit tightly together, thus ensuring that the stacked stator core has good integrity.
[0021] A rectangular square steel bar 5 with dimensions compatible with dovetail groove 3 and dovetail groove 4 of the bayonet is selected. The square steel bar 5 is made of Q235 steel with moderate strength, good toughness, good machinability, and good weldability. The material is placed in the channel formed by the dovetail groove 3 and the dovetail groove 4, so that the square steel 5 is completely embedded in the channel. Through the mechanical limiting action of the square steel, the stator lamination 1 and the stator pressure ring 2 are firmly fixed together with the square steel 5 by welding, thus completing the assembly of the stator core.
[0022] After the stator core is assembled, a comprehensive inspection of the stator core structure is carried out, including dimensional accuracy, appearance quality, and connection firmness. Any parts that do not meet the requirements are repaired to finally obtain a stator core that meets the quality standards.
Claims
1. A stator core based on a dovetail groove interlocking square steel fastening structure, characterized in that: The stator core body is formed by stacking several stator laminations (1) in a fan-shaped structure. The upper and lower ends of the stacked stator laminations (1) are respectively provided with stator pressure rings (2). The edges of the stator laminations (1) are provided with several dovetail grooves (3). The outer edge of the stator pressure rings (2) is provided with several dovetail grooves (4) corresponding to the dovetail grooves (3) of the stator laminations (1). The channel formed by the dovetail grooves (3) and the dovetail grooves (4) is inlaid with matching square steel (5).
2. The stator core based on a dovetail groove interlocking square steel fastening structure according to claim 1, characterized in that: The bayonet dovetail grooves (3) are arranged at equal intervals.
3. A stator core based on a dovetail groove interlocking square steel fastening structure according to claim 1, characterized in that: The bayonet dovetail grooves (4) are arranged at equal intervals.
4. A stator core based on a dovetail groove interlocking square steel fastening structure according to claim 1, characterized in that: The square steel (5) has a cuboid structure.
5. A stator core based on a dovetail groove interlocking square steel fastening structure according to claim 1, characterized in that: The length of the square steel (5) is consistent with the length of the channel formed by the first dovetail groove (3) and the second dovetail groove (4).
6. A stator core based on a dovetail groove interlocking square steel fastening structure according to claim 1, characterized in that: The square steel (5) is welded to the channel formed by the first dovetail groove (3) and the second dovetail groove (4).
7. A stator core based on a dovetail groove interlocking square steel fastening structure according to claim 1, characterized in that: The surface of the square steel (5) is provided with several lifting holes (6) for lifting and transportation.