A stator core structure
By rotating and stacking conventional laminations, oil collecting laminations, and oil spraying laminations, combined with axial continuous through welding, the problems of multiple types of laminations and complex welding in the stator core structure are solved, achieving cost reduction and improved heat dissipation efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI JUYI POWER SYST CO LTD
- Filing Date
- 2025-04-02
- Publication Date
- 2026-06-02
AI Technical Summary
The existing stator core structure requires various laminations and complex processing techniques, resulting in high mold opening costs and cumbersome welding steps.
Conventional laminations, oil collecting laminations, and oil spraying laminations are rotated and stacked, and axial continuous through welding is performed through welding grooves No. 1, No. 2, and No. 3, simplifying the welding steps. The oil spray nozzles are set at different pitch circles to form an inclined angle.
It reduces the types of stamping pieces, lowers mold opening costs, simplifies welding processes, and improves heat dissipation efficiency and the flexibility of oil spray angle adjustment.
Smart Images
Figure CN224319109U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of motor technology, and specifically relates to a stator core structure. Background Technology
[0002] To improve the cooling effect of drive motors, oil cooling solutions are now the most common, and there are two technical approaches. The first is to add a rain-spraying ring structure to the stator core to connect the closed oil channels. The oil-spraying ring is equipped with an oil outlet to spray the winding ends.
[0003] Second, by stacking multiple laminations, the oil-drenching ring and additional seals are eliminated.
[0004] Disadvantages of the oil-spraying ring structure technology:
[0005] In addition to adding two oil-drenching rings, this structure also requires additional sealing rings at the contact points between the oil-drenching rings and the iron core, as well as at the contact points between the oil-drenching rings and the housing. It involves a variety of materials and a complex assembly process.
[0006] Current disadvantages of eliminating the oil-spraying ring structure:
[0007] There are many types of stator laminations. To achieve closed oil passages, multiple laminations are required. These laminations are stacked to connect the oil passages. At the oil injection port, the oil is sprayed onto the winding ends by staggered stacking. At the same time, due to the rotational misalignment of the laminations, an adhesive process is required to eliminate welding, or multiple non-continuous weld lines are used to connect the core. The core processing technology is complex.
[0008] Therefore, there is an urgent need for a stator core structure that can reduce the types of laminations and save on stator core mold opening costs. Utility Model Content
[0009] To address the above problems, this utility model proposes a stator core structure, comprising:
[0010] A conventional lamination has an oil channel structure in its circumferential direction; the oil channel structure is located at a position corresponding to the teeth of the stator core; multiple No. 1 welding grooves and No. 1 keyways are provided at the intervals of the oil channel structure.
[0011] An oil collecting stamp has an outer diameter smaller than that of a conventional stamp. The circumference of the oil collecting stamp extends outward to form a second welding groove and a second keyway. The second welding groove is aligned with the first welding groove, and the second keyway is aligned with the first keyway. An oil-exposed structure is provided on the outer edge of the oil collecting stamp.
[0012] The oil-spraying stamp has a No. 3 welding groove and a No. 3 keyway on its outer periphery; the oil-spraying stamp has an oil spraying structure.
[0013] Conventional laminations, oil collecting laminations, and oil spraying laminations are stacked by rotation to form a conventional iron core, an oil collecting iron core, and an oil spraying iron core; the conventional iron core, the oil collecting iron core, and the oil spraying iron core are welded to form a stator core assembly.
[0014] Furthermore, multiple sets of conventional iron cores are rotated and stacked with an angle difference of 'a'; the first keyway is broken, and the oil passage structure and the first welding groove are connected.
[0015] Furthermore, the two sets of oil collecting iron cores are symmetrically arranged relative to the conventional iron core to form a circumferential through oil channel; the No. 2 welding groove is aligned with the No. 1 welding groove, and the No. 2 keyway is aligned with the No. 1 keyway.
[0016] Furthermore, the oil-spraying iron cores are stacked by rotating by an angle b, and the oil-spraying structures on adjacent oil-spraying iron cores are connected.
[0017] Furthermore, the oil passage structure includes an oil passage port and an oil passage hole; the oil passage hole of the adjacent oil collecting iron core is connected to the oil passage port.
[0018] Furthermore, the fuel injection structure is a fuel injection port; the fuel injection port is connected to the fuel passage hole.
[0019] Furthermore, the oil injection nozzles on adjacent oil injection blades are arranged in N rings, and each ring of oil injection nozzles is staggered at an angle b on different pitch circles. The oil injection nozzles on multiple oil injection iron cores are rotated and stacked to form an inclined angle.
[0020] Furthermore, the oil passage port and the oil passage hole are spaced apart and positioned at corresponding locations in the No. 2 welding groove; the oil passage port is located on the outer periphery of the oil collecting punch in the No. 2 welding groove; and the oil passage hole is located on the inner side of the oil collecting punch in the No. 2 welding groove.
[0021] Beneficial effects
[0022] The advantages of this utility model over the prior art are as follows:
[0023] 1. This application only requires conventional laminations, oil collecting laminations, and oil spraying laminations to be rotated and stacked into a stator core assembly, which reduces the types of laminations and lowers the cost of mold opening; at the same time, by adopting axial continuous through welding, the welding steps are reduced; and when the oil collecting and oil spraying functions are not required, by eliminating the oil collecting and oil spraying laminations, conventional laminations can be directly used in conventional products without additional modifications.
[0024] 2. This application uses three staggered oil injection clips on different pitch circles to make the three oil injection iron cores stacked to form an angle that tilts from the inside out; at the same time, when it is necessary to adjust the oil injection angle, the number of oil injection blades contained in each oil injection iron core can be adjusted to change the oil injection angle.
[0025] 3. This application adopts a through welding groove, and performs continuous through welding through welding groove No. 1, welding groove No. 2 and welding groove No. 3, eliminating non-continuous welding steps, simplifying the iron core welding process, and ensuring the continuity of welding steps.
[0026] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description
[0027] 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.
[0028] Figure 1 A schematic diagram of the structure of a conventional lamination in an embodiment of this utility model is shown.
[0029] Figure 2a It shows Figure 1 A magnified view of a section of the oil passage structure.
[0030] Figure 2b It shows Figure 1 A magnified view of a section of the No. 1 welding tank.
[0031] Figure 3 A schematic diagram of the conventional iron core assembly in an embodiment of this utility model is shown.
[0032] Figure 4 A schematic diagram of the oil collecting plate in an embodiment of this utility model is shown.
[0033] Figure 5a It shows Figure 4 A magnified view of a portion of the oil passage.
[0034] Figure 5b It shows Figure 4 A magnified view of a section of the oil inlet.
[0035] Figure 6 A schematic diagram of the oil collecting core assembly in an embodiment of this utility model is shown.
[0036] Figure 7 A schematic diagram of the structure of the combination of conventional iron core and oil collecting iron core in an embodiment of this utility model is shown.
[0037] Figure 8A schematic diagram of the structure of the oil spraying blade in an embodiment of this utility model is shown.
[0038] Figure 9 A side sectional view of the oil-spraying iron core assembly in an embodiment of this utility model is shown.
[0039] Figure 10 A schematic diagram of the structure of the conventional iron core, oil collecting iron core and oil spraying iron core combination in an embodiment of this utility model is shown.
[0040] Figure 11 A schematic diagram of the oil flow path in an embodiment of this utility model is shown.
[0041] In the diagram, 1 is a conventional iron core; 11 is a conventional lamination; 111 is the first welding groove; and 112 is the first keyway.
[0042] 2. Oil collecting core; 21. Oil collecting lamination; 211. Welding groove No. 2; 212. Keyway No. 2; 213. Oil passage port; 214. Oil passage hole;
[0043] 3. Oil-sprayed iron core; 31. Oil-sprayed stamping; 311. No. 3 welding groove; 312. No. 3 keyway; 313. Oil spray nozzle. Detailed Implementation
[0044] 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.
[0045] This application provides a stator core structure, including:
[0046] refer to Figure 1 and Figure 2a A conventional lamination 11 has an oil passage structure in its circumferential direction; the oil passage structure is located at a position corresponding to the teeth of the stator core; reference Figure 2b Multiple No. 1 welding grooves 111 and No. 1 keyway 112 are provided at the intervals of the oil passage structure.
[0047] refer to Figure 4 The oil collecting stamp 21 has an outer diameter smaller than that of the conventional stamp 11. A second welding groove 211 and a second keyway 212 extend outwards from the circumference of the oil collecting stamp 21. The second welding groove 211 is aligned with the first welding groove 111, and the second keyway 212 is aligned with the first keyway 112. An oil-exposed structure is provided on the outer edge of the oil collecting stamp 21.
[0048] refer to Figure 8 The oil spraying stamp 31 has a No. 3 welding groove 311 and a No. 3 keyway 312 on its outer periphery; the oil spraying stamp 31 has an oil spraying structure.
[0049] refer to Figure 3 , Figure 7 and Figure 10 Conventional laminations 11, oil collecting laminations 21, and oil spraying laminations 31 are stacked by rotation to form conventional iron core 1, oil collecting iron core 2, and oil spraying iron core 3; conventional iron core 1, oil collecting iron core 2, and oil spraying iron core 3 are welded to form a stator core assembly. Oil collecting iron core 2 is symmetrically arranged at both ends of conventional iron core 1, and oil spraying iron core 3 is also symmetrically arranged at the ends of oil collecting iron core with respect to conventional iron core 1.
[0050] refer to Figure 11 Following the direction of the arrow, the oil enters from the axial oil passage structure in the middle of the conventional iron core 1 formed by the conventional lamination 11; the oil then flows to both sides along the axial oil passage structure, flowing to the oil collecting iron core 2 formed by the oil collecting lamination 21; the oil then enters the circumferential oil passage of the oil collecting iron core 2 through the oil passage structure; the oil in the oil collecting iron core 2 enters the oil spraying iron core 3 formed by the oil spraying lamination 31 through the oil spraying structure; the oil is directionally sprayed by the oil spraying structure, covering the surface of the winding end and carrying away heat; the through-channel design ensures uniform oil distribution and avoids local overheating.
[0051] This application reduces the types of laminations and lowers the mold opening cost by using only conventional laminations 11, oil collecting laminations 21, and oil spraying laminations 31 to form a stator core assembly with a rotating stacked shape. At the same time, the use of axial continuous through welding reduces the number of welding steps. Furthermore, when the oil collecting and spraying functions are not required, the conventional laminations 11 can be directly used in conventional products without additional modifications by eliminating the oil collecting laminations 21 and oil spraying laminations 31.
[0052] In one embodiment of this utility model, reference is made to... Figure 3 Multiple sets of conventional iron cores 1 are rotated and stacked with an angle difference of 'a'; the first keyway 112 is disconnected, and the oil passage structure and the first welding groove 111 are connected. When the conventional iron cores 1 are rotated and stacked, the first keyway 112 at both ends is aligned to facilitate the positioning when connecting the oil collecting iron cores at both ends.
[0053] Taking 'a' as 120° as an example, four sets of conventional laminations 11 form a conventional iron core 1. The four sets of conventional iron cores 1 are stacked sequentially by rotating 120°, so that the first keyway 112 on adjacent conventional iron cores 1 is disconnected by a difference of 120°. The first keyway 112 on the first set of conventional iron cores 1 and the fourth set of conventional iron cores 1 are aligned, and the oil channel structure and the first welding groove 111 form a through structure. The first keyway 112 is used for positioning in the flat wire stator production process and for reference alignment during electric drive product assembly. The staggered disconnection of the first keyway 112 can disperse stress distribution and avoid local stress concentration. After rotation, the oil channel structure forms a spiral shape, so that the oil covers a larger area of the stator surface during the flow process, avoiding local cooling dead zones and improving heat dissipation efficiency.
[0054] Taking 'a' as 90° as an example, five sets of conventional laminations 11 form a conventional iron core 1. The five sets of conventional iron cores 1 are stacked sequentially by rotating 90°, so that the first keyway 112 on adjacent conventional iron cores 1 is disconnected by 90°. The first keyway 112 on the first set of conventional iron cores 1 and the fifth set of conventional iron cores 1 are aligned, and the oil channel structure and the first welding groove 111 form a through structure.
[0055] In one embodiment of this utility model, two sets of oil collecting iron cores 2 are symmetrically arranged relative to conventional iron cores 1 to form a circumferential through oil channel; the second welding groove 211 is aligned with the first welding groove 111, and the second keyway 212 is aligned with the first keyway 112.
[0056] The positions of keyway 212 and keyway 112 can be positioned by corresponding positioning pins to prevent the lamination position from shifting and to limit the radial and circumferential movement of the conventional lamination 11 and the oil collecting lamination 21; this facilitates subsequent continuous welding operations.
[0057] In one embodiment of this utility model, the oil-spraying iron cores 3 are stacked by rotating by an angle b, and the oil-spraying structures on adjacent oil-spraying iron cores 3 are connected.
[0058] refer to Figure 9 The oil injection nozzles 313 on the adjacent oil injection blades 31 are arranged in N rings. Each ring of oil injection nozzles 313 is staggered at an angle b on different pitch circles. The oil injection nozzles 313 on multiple oil injection iron cores 3 are stacked by rotation to form an inclined angle.
[0059] Taking b as 60°, N as 3, and three injection cores 3 on one side, each injection core 3 comprising five injection nozzles 31 as an example; the first layer of injection nozzles 313 on the injection nozzles 31 is located on the pitch circle with the largest diameter, the second layer of injection nozzles 313 is on the second pitch circle and rotated 60° from the first layer of injection nozzles 313, and the third layer of injection nozzles 313 is on the third pitch circle and rotated 60° from the second layer of injection nozzles 313; the three layers of injection nozzles 313 on the three injection cores 3 correspond one-to-one, and then the second injection core 3 is rotated 60°. The third fuel injection core 3 rotates 60° relative to the second fuel injection core 3; from the inside out, the first layer of fuel injection nozzles 313 on the first fuel injection core 3 is connected to the second layer of fuel injection nozzles 313 on the second fuel injection core 3 and the third layer of fuel injection nozzles 313 on the third fuel injection core 3; the inner diameter of the three layers of fuel injection nozzles 313 on each fuel injection blade 31 gradually decreases; so that the three fuel injection cores 3 are stacked to form an angle that tilts from the inside out; when it is necessary to adjust the fuel injection angle, the number of fuel injection blades 31 contained in each fuel injection core 3 can be adjusted to change the fuel injection angle.
[0060] The first layer (ring) of fuel injectors 313 consists of 12 rectangular fuel injectors 313, and the second and third layers of fuel injectors 313 also consist of 12 rectangular fuel injectors 313. The starting point of the first layer of fuel injectors 313 on the first fuel injector core 3 is 60° away from the starting point of the second layer of fuel injectors 313 on the second fuel injector core 3, and the starting point of the second layer of fuel injectors 313 on the second fuel injector core 3 is 60° away from the starting point of the third layer of fuel injectors 313 on the third fuel injector core 3. At the same time, the fuel injectors 313 can adopt other different shapes. The arrangement of the fuel injectors is not strictly limited, as long as the three fuel injector cores 3 are rotated and stacked, and the three rings of fuel injectors 313 can be connected in sequence.
[0061] The stacking thickness of the spray nozzles 31 can also be adjusted in two ways: one is to insert adjustable shims between each spray nozzle 31, and the other is to combine and stack spray nozzles 31 of different thicknesses.
[0062] In one embodiment of this utility model, reference is made to... Figure 5a , Figure 5b and Figure 6 The oil passage structure includes an oil passage port 213 and an oil passage hole 214; the oil passage hole 214 of the adjacent oil collecting iron core 2 is connected to the oil passage port 213.
[0063] In one embodiment of this utility model, the oil spraying structure is an oil spray nozzle 313; the oil spray nozzle 313 is connected to the oil passage hole 214.
[0064] The oil passage holes 214 and oil outlets 213 of the two-layer oil collecting iron core 2 correspond to each other. The oil flows from the oil passage structure of the conventional iron core 1 to the position of the oil outlet 213, enters the circumferential oil passage of the oil collecting iron core 2, and then flows through the oil passage holes 214 so that the oil flows into the oil spray nozzle 313, and finally sprays and covers the winding.
[0065] In one embodiment of the present invention, the oil passage 213 and the oil passage hole 214 are spaced apart and positioned at corresponding positions in the second welding groove 211; the oil passage 213 is positioned on the outer periphery of the oil collecting punch 21 located in the second welding groove 211; and the oil passage hole 214 is positioned on the inner side of the oil collecting punch 21 located in the second welding groove 211.
[0066] The oil outlet 213 is integrally formed with the second welding groove 211, and by forming an arc-shaped depression, it provides an oil passage for the oil to flow.
[0067] When carrying out the specific fabrication of the stator core structure:
[0068] Multiple sets of conventional iron cores 1 are stacked with rotation angles 120° apart to form an axially penetrating oil channel structure and a first welding groove 111;
[0069] Oil collecting cores 2 are stacked at both ends of the conventional iron core 1, and a circumferential oil passage is formed through the oil passage structure;
[0070] Oil injection cores 3 are stacked on the outside of oil collection core 2 with a rotation angle difference of b.
[0071] Through welding is performed along welding groove 111, welding groove 211 and welding groove 311 to form the stator core assembly.
[0072] The stacking process also includes the following steps:
[0073] The conventional iron core 1 and the oil collecting iron core 2 are aligned by keyway 112 and keyway 212; keyway 212 and keyway 312 are aligned by keyway 212 and keyway 312, so that welding groove 111, welding groove 211 and welding groove 311 are axially connected, and the oil passage structure is axially connected, so that the stator iron core assembly is stacked.
[0074] Although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A stator core structure, characterized in that, include: A conventional lamination (11) is provided with an oil channel structure in the circumference of the conventional lamination (11); the oil channel structure is set at a position corresponding to the stator core teeth; a plurality of No. 1 welding grooves (111) and No. 1 keyways (112) are provided at the intervals of the oil channel structure. An oil collecting stamp (21) has an outer diameter smaller than that of a conventional stamp (11). The circumference of the oil collecting stamp (21) extends outward to form a second welding groove (211) and a second keyway (212). The second welding groove (211) is aligned with the first welding groove (111), and the second keyway (212) is aligned with the first keyway (112). An oil-exposed structure is provided on the outer edge of the oil collecting stamp (21). The oil spraying stamp (31) has a No. 3 welding groove (311) and a No. 3 keyway (312) on its outer periphery; the oil spraying stamp (31) has an oil spraying structure. Conventional laminations (11), oil collecting laminations (21), and oil spraying laminations (31) are stacked by rotation to form conventional iron cores (1), oil collecting iron cores (2), and oil spraying iron cores (3); conventional iron cores (1), oil collecting iron cores (2), and oil spraying iron cores (3) are welded to form a stator core assembly.
2. The stator core structure according to claim 1, characterized in that, Multiple sets of conventional iron cores (1) are rotated and stacked with an angle difference of a; the first keyway (112) is broken, and the oil passage structure and the first welding groove (111) are connected.
3. A stator core structure according to claim 2, characterized in that, Two sets of oil collecting iron cores (2) are symmetrically arranged relative to the conventional iron core (1) to form a circumferential through oil channel.
4. A stator core structure according to claim 3, characterized in that, The oil-spraying iron cores (3) are stacked by rotating by an angle b, and the oil-spraying structures on adjacent oil-spraying iron cores (3) are connected.
5. A stator core structure according to claim 1, characterized in that, The oil passage structure includes an oil passage port (213) and an oil passage hole (214); the oil passage hole (214) of the adjacent oil collecting iron core (2) is connected to the oil passage port (213).
6. A stator core structure according to claim 5, characterized in that, The oil spraying structure is an oil spray nozzle (313); the oil spray nozzle (313) is connected to the oil passage hole (214).
7. A stator core structure according to claim 6, characterized in that, The oil nozzles (313) on the adjacent oil spraying blades (31) are arranged in N rings. Each ring of oil nozzles (313) is staggered at an angle b on different pitch circles. The oil nozzles (313) on multiple oil spraying iron cores (3) are stacked by rotation to form an inclined angle.
8. A stator core structure according to claim 5, characterized in that, The oil passage (213) and oil hole (214) are spaced apart and positioned at corresponding locations on the No. 2 welding groove (211); the oil passage (213) is positioned on the outer periphery of the oil collecting punch (21) on the No. 2 welding groove (211); the oil hole (214) is positioned on the inner side of the oil collecting punch (21) on the No. 2 welding groove (211).