Stator core device

Abstract

The invention relates to a stator core device, which comprises a front-section stator core, a rear-section stator core and a middle-section stator core, the middle-section stator core comprises an inner core ring and a plurality of core bodies, the plurality of core bodies are uniformly arranged at intervals along the circumferential direction of the outer circumference of the inner core ring, a radial oil inlet channel is formed between the adjacent core bodies, an annular oil inlet channel is formed in the middle-section stator core, and the annular oil inlet channel is communicated with the inner core ring. The annular oil inlet channel is communicated with the radial oil inlet channel; according to the technical scheme, the annular oil inlet channel formed at the stator iron core of the middle section is matched with the radial oil inlet channel formed between the iron core bodies on the inner iron core ring, so that cooling oil directly takes away heat of the inner iron core and a wire group through the oil channels, and the interior can be directly and rapidly cooled; the inner iron core ring structure is matched with the front-section stator iron core and the rear-section stator iron core, so that a complete closed structure is formed inside, and cooling oil is prevented from entering the surface of a rotor rotating at a high speed, so that oil stirring loss is prevented from being increased.

Description

A stator core device Technical Field

[0001] This invention relates to the field of generators, and more specifically to a stator core device. Background Technology

[0002] With the rapid development of new energy vehicles, industrial automation, and other fields, the performance requirements of motors, as core power devices, are increasing. Especially in applications with high power density and high torque density, motor heat dissipation has become one of the key factors restricting performance improvement. Traditional motor cooling methods, such as air cooling, water cooling, and end-spray oil cooling, are no longer sufficient to meet the demand for efficient heat dissipation. To address this issue, existing optimization and improvement solutions, such as in-slot oil cooling structures that utilize the stator winding slots as oil channels, enhance the cooling effect by fully utilizing the direct contact between the conductors in the slots and the cooling oil. However, due to the open slot structure, the cooling oil flows directly to the surface of the high-speed rotating rotor, resulting in significant oil churning losses. To solve this problem, existing technologies use air gap oil separators or slot sealing components to avoid direct oil churning losses in the rotor. However, the oil separators require space in the stator and rotor air gaps, increasing the electromagnetic air gap and reducing motor performance. Furthermore, these structures add extra parts and assembly processes.

[0003] Therefore, in order to solve the above problems, an automatic charging device for new energy vehicles is needed to solve the aforementioned technical issues. Summary of the Invention

[0004] This technical solution utilizes an annular oil inlet channel formed at the middle section of the stator core, combined with a radial oil inlet channel formed between the inner core ring and the core body, to directly remove heat from the internal core and coil assembly through the oil channels. This allows for rapid and direct cooling of the interior. The inner core ring structure, along with the installation of the front and rear stator cores, creates a complete closed structure inside, preventing the cooling oil from entering the surface of the high-speed rotating rotor and thus avoiding increased oil churning losses.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A stator core device, comprising a front stator core, a rear stator core, and a middle stator core; the middle stator core includes an inner core ring and a core body protruding outward along the radial direction of the inner core ring, wherein there are multiple core bodies and the multiple core bodies are evenly spaced along the outer circumference of the inner core ring, and a radial oil inlet channel is formed between adjacent core bodies, and an annular oil inlet channel is formed between the middle stator core and the front stator core and the rear stator core, and the annular oil inlet channel is connected to the radial oil inlet channel.

[0006] Furthermore, the core body has an overall "T" shaped structure, and the core body protrudes inward along the radial direction to form stator tooth plates. There are two stator tooth plates, and the two stator tooth plates are arranged symmetrically with respect to the core body.

[0007] Furthermore, the iron core body has two iron core wire holes for winding the wire group, and the two iron core wire holes are symmetrically distributed with respect to the iron core body.

[0008] Furthermore, the stator tooth plate extends inward in the radial direction and forms an inner diameter oil passage between it and the inner core ring, and the inner diameter oil passage communicates with the core wire hole.

[0009] Furthermore, a radial oil inlet channel is formed between adjacent stator tooth plates between adjacent iron core bodies, and the radial oil inlet channel is connected to the inner diameter oil channel.

[0010] Furthermore, the stator tooth plate is provided with a tooth plate oil groove, the tooth plate oil groove has an oil groove inlet end and an oil groove outlet end, the oil groove inlet end is connected to a radial oil inlet channel, and the oil groove outlet end is connected to the iron core wire hole.

[0011] Furthermore, the groove width gradually decreases from the oil inlet end to the oil outlet end of the oil tank.

[0012] Furthermore, multiple oil grooves are arranged along the length of the stator tooth plate.

[0013] Furthermore, both the front stator core and the rear stator core are provided with stator core holes for use with core wire holes.

[0014] Furthermore, it also includes an outer casing, which is integrated with the front stator core, the rear stator core and the middle stator core. The outer casing is provided with an oil inlet hole for introducing oil into the annular oil inlet channel.

[0015] The beneficial effects of this technical solution are as follows: This technical solution uses the annular oil inlet channel formed at the middle section of the stator core, combined with the radial oil inlet channel formed between the inner core ring and the core body, to directly carry away the heat of the internal core and coil through the oil channel, so that the internal temperature can be directly and quickly cooled down. The inner core ring structure, combined with the installation of the front and rear stator cores, forms a complete closed structure inside, which prevents the cooling oil from entering the surface of the high-speed rotating rotor, thus avoiding increased oil churning loss. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is an isometric schematic diagram of the middle section stator core of the present invention; Figure 3 is a schematic diagram of the installation of the middle section stator core of the present invention; Figure 4 is a front view of the middle section stator core of the present invention; Figure 5 is an enlarged view of point A in Figure 4 of the present invention.

[0017] The components represented by each number in the attached diagram are listed below: 1-front stator core; 2-rear stator core; 3-middle stator core; 11-stator core hole; 31-annular oil inlet channel; 32-radial oil inlet channel; 33-core wire hole; 34-inner core ring; 35-core body; 36-stator tooth plate; 37-inner diameter oil channel; 38-tooth plate oil groove; 381-oil groove inlet end; 382-oil groove outlet end. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] As shown in Figures 1-4, in this embodiment of the application, a stator core device includes a front stator core 1, a rear stator core 2, and an intermediate stator core 3. The intermediate stator core 3 includes an inner core ring 34 and a core body 35 protruding outward along the radial direction of the inner core ring 34. There are multiple core bodies 35, and the multiple core bodies 35 are evenly spaced along the outer circumference of the inner core ring 34. A radial oil inlet channel 32 is formed between adjacent core bodies 35. An annular oil inlet channel 31 is formed between the intermediate stator core 3 and the front stator core 1 and the rear stator core 2. The annular oil inlet channel 31 is connected to the radial oil inlet channel 32.

[0023] In this embodiment, the annular oil inlet channel 31 formed at the middle section of the stator core 3, together with the radial oil inlet channel 32 formed between the inner core ring 34 and the core body 35, allows the cooling oil to directly carry away the heat from the internal core and wire assembly, enabling rapid cooling. The structure of the inner core ring 34, along with the installation of the front stator core 1 and the rear stator core 2, forms a complete closed structure inside, preventing the cooling oil from entering the surface of the high-speed rotating rotor and increasing oil churning losses.

[0024] In this embodiment, the core body 35 has an overall "T" shaped structure. The core body 35 has a stator tooth plate 36 that protrudes inward in the radial direction. There are two stator tooth plates 36, and the two stator tooth plates 36 are symmetrically arranged with respect to the core body 35.

[0025] As shown in Figures 1-4, the inner core ring 34 protrudes outward along the circumference to form a continuous and equally spaced core body 35 structure. The core body 35 is T-shaped. After the inner core ring 34 is installed with the front stator core 1 and the rear stator core 2, a complete closed (sealed) structure is formed inside. This arrangement effectively prevents lubricating oil from entering the rotor surface. The two ends of the core body 35 protrude inward along the radial direction (i.e., in the direction of the center of the middle stator core 3 in Figure 4) and extend to form a stator tooth plate 36 structure. There are two identical stator tooth plates 36, which are symmetrically arranged with respect to the core body 35. Of course, the stator tooth plate 36 and the core body 35 can be manufactured using an integral molding process to ensure that the overall structure meets the performance requirements.

[0026] In this embodiment, the iron core body 35 is provided with iron core wire holes 33 for winding the wire group. There are two iron core wire holes 33, and the two iron core wire holes 33 are symmetrically distributed with respect to the iron core body 35.

[0027] As shown in Figures 1-4, core wire holes 33 for winding are provided on the core body 35. The core wire holes 33 are symmetrically distributed relative to the core body 35. The core wire holes 33, together with the subsequent cooling oil, realize the functional requirements of coil winding and provide a flow channel for cooling oil. Since the internal coil is the main source of heat generation, the cooling oil can effectively remove heat in a timely manner after direct contact with the coil, thus improving the heat dissipation effect.

[0028] In this embodiment, the stator tooth plate 36 extends inward in the radial direction and forms an inner diameter oil passage 37 between it and the inner iron core ring 34. The inner diameter oil passage 37 is connected to the iron core wire hole 33.

[0029] As shown in Figure 2-4, the end of the stator tooth plate 36 extends radially to a position close to the inner core ring 34. A gap of inner diameter oil passage 37 is formed between the end of the stator tooth plate 36 and the inner core ring 34. The inner diameter oil passage 37 is connected to the core wire hole 33, which facilitates the flow of cooling oil from the inner diameter oil passage 37 into the core wire hole 33 for effective cooling.

[0030] In this embodiment, a radial oil inlet channel 32 is formed between adjacent stator tooth plates 36 between adjacent iron core bodies 35, and the radial oil inlet channel 32 is connected to the inner diameter oil channel 37.

[0031] As shown in Figure 2-4, adjacent stator tooth plates 36 between two adjacent iron core bodies 35 form a radial oil inlet channel 32. After the cooling oil enters from the annular oil inlet channel 31, it continues to flow inward in the radial direction through the radial oil inlet channel 32 between the stator tooth plates 36, and finally enters the iron core wire hole 33 through the inner diameter oil channel 37 at the bottom, so as to achieve sufficient cooling of the internal structure.

[0032] In this embodiment, the stator tooth plate 36 is provided with a tooth plate oil groove 38. The tooth plate oil groove 38 has an oil groove inlet end 381 and an oil groove outlet end 382. The oil groove inlet end 381 is connected to the radial oil inlet channel 32, and the oil groove outlet end 382 is connected to the iron core wire hole 33.

[0033] As shown in Figure 4-5, the stator tooth plate 36 has a tooth plate oil groove 38 structure on its surface. The tooth plate oil groove 38 has an oil groove inlet end 381 and an oil groove outlet end 382, ​​which facilitates the direct entry of cooling oil from the radial oil inlet channel 32 into the core wire hole 33. With the tooth plate oil groove 38 structure, after the cooling oil enters from the radial oil inlet channel 32, it can simultaneously enter the core wire hole 33 through the tooth plate oil groove 38 and the radial oil inlet channel 32, which can cool the coils at multiple positions in the wire hole. This arrangement increases the oil intake and improves the contact area between the cooling oil and the components, thus improving the internal heat dissipation effect. When the structure is at point A in Figure 5, the cooling oil from... The oil flows upward through the radial inlet channel 32 at the bottom. When the cooling oil reaches the toothed plate oil groove 38 at the bottom, it can enter the iron core wire hole 33 without having to flow into the iron core wire hole 33 through the inner diameter oil groove 37 at the top of the radial inlet channel 32. The advantage of this structure is that when the internal coil does not require a large flow of cooling oil, the oil inlet pressure does not need to be too high. That is, the cooling effect can be achieved by the oil inlet pressure through the toothed plate oil groove 38 at the bottom. When the cooling effect needs to be improved, the oil inlet pressure is increased, and the cooling oil can enter the iron core wire hole 33 simultaneously from multiple positions. This increases the cooling contact area between the cooling oil and the internal components, while meeting the usage conditions of various operating conditions.

[0034] In this embodiment, the groove width from the oil inlet end 381 to the oil outlet end 382 of the oil tank gradually decreases.

[0035] As shown in Figure 4-5, the groove width gradually decreases from the oil inlet end 381 to the oil outlet end 382 of the oil tank, so that the oil inlet end, in conjunction with the radial oil inlet channel 32, has more oil to be introduced, increasing the contact area. At the same time, when the oil is sprayed out from the oil outlet end 382 of the oil tank, it has a greater oil spray pressure, improving the internal cooling effect.

[0036] In this embodiment, multiple tooth plate oil grooves 38 are arranged along the length of the stator tooth plate 36.

[0037] As shown in Figure 4-5, multiple tooth plate oil grooves 38 are arranged along the length of the stator tooth plate 36. This arrangement increases the direct contact area between the oil and the components, while also meeting the cooling requirements of different working conditions. Of course, the opening of the tooth plate oil grooves 38 does not affect the strength requirements of the components, ensuring their performance.

[0038] In this embodiment, both the front stator core 1 and the rear stator core 2 are provided with stator core holes 11 for use with core wire holes.

[0039] As shown in Figure 1, stator core holes 11 are provided on both the front stator core 1 and the rear stator core 2. When the cooling oil enters from the annular oil inlet channel 31, it fully cools the internal components through the internal core wire holes 33 and then exits from the stator core holes 11 on the front stator core 1 and the rear stator core 2, carrying away the heat inside the entire device.

[0040] In this embodiment, an outer shell is also included. The outer shell is integrated with the front stator core 1, the rear stator core 2 and the middle stator core 3. An oil inlet hole is provided on the outer shell to facilitate the introduction of oil through the annular oil inlet channel 31.

[0041] It also includes an outer casing structure (an existing structure can be used, not shown in the figure), which is used to install the front stator core 1, the rear stator core 2 and the middle stator core 3. After the middle stator core 3 is installed with the front stator core 1 and the rear stator core 2, it is installed with the outer casing by interference fit. The outer casing is provided with an oil inlet hole to guide the cooling oil into the annular oil inlet channel 31.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stator core device, characterized in that: It includes a front stator core (1), a rear stator core (2), and a middle stator core (3); the middle stator core (3) includes an inner core ring (34) and a core body (35) that protrudes outward along the radial direction of the inner core ring (34). The core body (35) consists of multiple core bodies (35) that are evenly spaced along the outer circumference of the inner core ring (34). A radial oil inlet channel (32) is formed between adjacent core bodies (35). An annular oil inlet channel (31) is formed between the middle stator core (3) and the front stator core (1) and the rear stator core (2). The annular oil inlet channel (31) is connected to the radial oil inlet channel (32).

2. The stator core device according to claim 1, characterized in that: The core body (35) has a T-shaped structure. The core body (35) protrudes inward along the radial direction to form a stator tooth plate (36). There are two stator tooth plates (36), and the two stator tooth plates (36) are arranged symmetrically with respect to the core body (35).

3. The stator core device according to claim 2, characterized in that: The iron core body (35) has iron core wire holes (33) for winding the wire group. There are two iron core wire holes (33), and the two iron core wire holes (33) are symmetrically distributed with respect to the iron core body (35).

4. The stator core device according to claim 3, characterized in that: The stator tooth plate (36) extends inward in the radial direction and forms an inner diameter oil passage (37) between it and the inner core ring (34), and the inner diameter oil passage (37) is connected to the core wire hole (33).

5. The stator core device according to claim 4, characterized in that: The radial oil inlet passage (32) is formed between adjacent stator tooth plates (36) between adjacent iron core bodies (35), and the radial oil inlet passage (32) is connected to the inner diameter oil passage (37).

6. The stator core device according to claim 3, characterized in that: The stator tooth plate (36) is provided with a tooth plate oil groove (38), the tooth plate oil groove (38) has an oil groove inlet end (381) and an oil groove outlet end (382), the oil groove inlet end (381) is connected to the radial oil inlet channel (32), and the oil groove outlet end (382) is connected to the iron core wire hole (33).

7. The stator core device according to claim 6, characterized in that: The groove width gradually decreases from the oil inlet end (381) to the oil outlet end (382) of the oil tank.

8. The stator core device according to claim 6, characterized in that: The tooth plate oil groove (38) is arranged in multiple ways along the length of the stator tooth plate (36).

9. The stator core device according to claim 3, characterized in that: Both the front stator core (1) and the rear stator core (2) are provided with stator core holes (11) for use with core wire holes (33).

10. The stator core device according to claim 1, characterized in that: It also includes an outer casing, which is integrated with the front stator core (1), the rear stator core (2) and the middle stator core (3). The outer casing is provided with an oil inlet hole for oil to be introduced into the annular oil inlet channel (31).

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