Oil-cooled motor stator
By designing regular oil channels and oil guide plates on the stator core of the oil-cooled motor, the problems of cooling performance waste and high cost are solved, and an oil-cooled motor stator with good cooling effect, simple assembly and low cost is achieved.
Patent Information
- Application Number
- CN202422935079.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-29
AI Technical Summary
The existing oil-cooled motor stator structure has problems such as wasted cooling performance, high cost, and difficult assembly. In particular, under the action of gravity, the cooling oil sprayed from the oil tank cannot be effectively sprayed onto the end windings. In addition, the existing oil guide components are large in size, high in cost, and difficult to fix.
An oil-cooled motor stator is designed. Multiple main core punchings are set on the stator core to form a middle section core and an end oil-conducting core. The end oil-conducting core is provided with an arc-shaped oil-conducting plate and an oil-conducting convex cap. The cooling oil is precisely sprayed to the winding through the regular oil channel design. The stator is fixed through a simple process, and the number of punching types is reduced to reduce costs.
An oil-cooled motor stator with good cooling effect, easy assembly and low cost is achieved, and the cooling oil is precisely sprayed onto the winding, reducing manufacturing costs and mold expenses.
Smart Images
Figure CN223451699U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to motor technical field, especially relate to an oil cooling motor stator. BACKGROUND
[0002] New energy vehicle permanent magnet synchronous motor is smaller in size, higher in power and pursues, the thermal load of motor is rising, the motor of vehicle is switched to flat wire motor from early round wire motor, and the motor cooling is directly cooled by cooling oil from early shell water cooling.
[0003] The existing oil cooling motor stator structure design is often two categories: the first structure is that the oil tank is evenly arranged in the circumferential direction, but due to the action of gravity, if the oil outlet position of the end of the iron core is not provided with the oil guide part, the oil sprayed by the oil tank at the lower end of the circumference cannot be well splashed on the end winding, thereby causing the waste of cooling performance, so the design often needs to be matched with an end oil guide part to guide the oil. The part is often large in size, high in manufacturing cost, and difficult to assemble. The second structure is that the iron core is used as an end oil guide part, the oil tank along the gravity direction of the lower half circumference is removed, only the upper oil outlet is reserved, and then the end oil guide part is arranged at the end oil outlet position, the part is smaller in size than the first design of the end oil guide part, but most of the industry currently adopts injection molding materials, which also has the problems of high cost and difficulty in fixing, and additionally increases a kind of iron core punching, thereby increasing the cost of grinding tool. UTILITY MODEL CONTENTS
[0004] In order to solve the above technical problems, the purpose of the utility model is to provide an oil cooling motor stator, which has good cooling effect, is convenient to assemble and low in cost.
[0005] In order to achieve the above utility model purposes, the utility model adopts the following technical solutions:
[0006] An oil-cooled motor stator comprises a winding and a stator core, the stator core is provided with winding slots, the winding is inserted into the winding slots, the stator core comprises an intermediate segment core and end oil guide cores arranged at both ends of the intermediate segment core, the end oil guide cores are formed by stacking a plurality of main core punching sheets, notches are arranged on the outer sides of the main core punching sheets, and the plurality of main core punching sheets are deflected from each other so that part of the notches are closed; the intermediate segment core is formed by alternately stacking a plurality of main core punching sheets and a plurality of circumferential oil channel punching sheets; the end oil guide cores are further provided with arc-shaped end oil guide sheets, a plurality of oil outlets are arranged on the end oil guide sheets at intervals, and the plurality of oil outlets are in communication with corresponding notches on the end oil guide cores; and the end oil guide sheets are further provided with oil guide convex caps capable of spraying cooling oil to the winding.
[0007] As a preferred solution, the end oil guide sheet is a thin iron sheet, the end surface is stamped upward to form an oil guide convex cap, and the oil guide convex cap forms an oil outlet at the inner diameter.
[0008] As a preferred solution, the included angle between the oil guide convex cap and the end oil guide sheet is α, and α is 10°-80°.
[0009] As a preferred solution, the notches on the outer side of the main core punching sheet in a sector region with a central angle of 120°-150° are circumferential upper end oil holes, the notches in the remaining region on the outer side of the main core punching sheet are circumferential lower end oil holes, and the density of the circumferential lower end oil holes is less than that of the circumferential upper end oil holes.
[0010] As a preferred solution, each two winding slots are stator teeth, one circumferential upper end oil hole is arranged in each stator tooth in a sector region with a central angle of 120°-150° on the outer side of the main core punching sheet, and n circumferential lower end oil holes are uniformly arranged in every several stator teeth in the remaining circumferential angle region on the outer side of the main core punching sheet.
[0011] As a preferred solution, the end oil guide core is formed by n+1 stacks of main core punching sheets based on the intermediate segment core and sequentially rotated by corresponding angles, and most of the circumferential upper end oil holes are open and all of the circumferential lower end oil holes are closed.
[0012] As a preferred solution, the end oil guide core is formed by n+1 stacks of main core punching sheets based on the intermediate segment core and sequentially rotated by angles a, 2a, 3a,... na, wherein a is the included angle formed by two adjacent stator teeth.
[0013] As a preferred solution, the circumferential lower end oil holes on the plurality of main core punching sheets of the intermediate segment core are aligned with each other, and the circumferential lower end oil holes on the plurality of main core punching sheets are also aligned with each other.
[0014] As a preferred solution, the outer diameter of the circumferential oil channel punching sheet is smaller than the outer diameter of the main core punching sheet, so that one or a plurality of adjacent circumferential oil channel punching sheets form a circumferential cooling oil channel with adjacent main core punching sheets.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] The utility model discloses a kind of end oil guide sheets, which are arranged in the end of the stator core, and the end oil guide sheet is arranged in the end of the stator core, and the end oil guide sheet is arranged in the end of the stator core. BRIEF DESCRIPTION OF DRAWINGS
[0017] The drawings accompanying the specification provide further understanding of the present application, serve as a further example of the present application, and explain the present application, but do not constitute limitations on the present application.
[0018] Figure 1 It is the overall structure schematic diagram (winding is not shown) of the utility model;
[0019] Figure 2 It is the structure schematic diagram of the end oil guide sheet of the utility model;
[0020] Figure 3 It is the convex angle schematic diagram of the oil guide convex cap in the end oil guide sheet of the utility model;
[0021] Figure 4 And Figure 5 It is the structure schematic diagram of the end oil guide sheet of the utility model at different angles;
[0022] Figure 6 It is the structure schematic diagram of the main core punching sheet of the utility model;
[0023] Figure 7 It is the structure schematic diagram of another main core punching sheet of the utility model;
[0024] Figure 8 It is the structure schematic diagram of another end oil guide sheet of the utility model;
[0025] Figure 9 It is the structure schematic diagram of the intermediate section core of the utility model;
[0026] Figure 10 It is the structure schematic diagram of the circumferential oil channel punching sheet of the utility model; DETAILED DESCRIPTION
[0027] It should be noted that the following detailed description is illustrative only, and is intended to provide further description in connection with the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application belongs.
[0028] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.
[0029] In addition, in the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0030] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.
[0031] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0034] like Figure 1 and Figure 2 As shown, an oil-cooled motor stator includes a winding and a stator core, wherein the stator core is provided with a winding slot 4, and the winding is inserted in the winding slot 4. The stator core includes a middle section core 3 and end oil-conducting cores 2 arranged at both ends of the middle section core 3. The side walls of the middle section core 3 and the end oil-conducting core 2 are both provided with axial cooling oil passages. The middle section core 3 is also provided with a plurality of annular circumferential cooling oil passages at intervals. The end oil-conducting core 2 is also provided with an arc-shaped end oil-conducting sheet 1, and a plurality of oil outlets 1-2 are spaced apart on the end oil-conducting sheet 1, and the plurality of oil outlets 1-2 are connected to the corresponding axial cooling oil passages on the end oil-conducting core 2. The end oil-conducting core 2 is also provided with an oil-conducting convex cap 1-1 that enables cooling oil to be sprayed toward the winding.
[0035] like Figure 2 and Figure 3 As shown, the end oil guide plate 1 is a thin iron substrate, with the end surface stamped upward to form an oil guide cap 1-1. The oil guide cap 1-1 forms an oil outlet 1-2 toward the inner diameter. The angle α formed between the oil guide cap 1-1 and the end oil guide plate 1 is 10°-80°.
[0036] like Figures 4 to 8As shown in the drawings, the end oil-guiding core 2 is formed by stacking a plurality of main core punching sheets 2-1, and a plurality of circumferential upper end oil passage holes 2-1-1 are uniformly formed on the outer side of the main core punching sheet 2-1 in a sector region with a central angle of 120°-150°, and a plurality of circumferential lower end oil passage holes 2-1-2 are uniformly formed on the outer side of the main core punching sheet 2-1 in the remaining region, and the density of the circumferential lower end oil passage holes 2-1-2 is less than that of the circumferential upper end oil passage holes 2-1-1. Each two winding grooves 4 are a stator tooth, and one circumferential upper end oil passage hole 2-1-1 is arranged on the outer side of the main core punching sheet 2-1 in the sector region with a central angle of 120°-150° corresponding to each stator tooth, and n circumferential lower end oil passage holes 2-1-2 are uniformly formed in each several stator teeth in the remaining circumferential angle region.
[0037] As a further optimized scheme, the end oil-guiding core 2 is formed by n+1 main core punching sheets 2-1 based on the middle section core 3 and sequentially rotating by angles a, 2a, 3a, …, na, wherein a is the included angle of two adjacent stator teeth, and most of the circumferential upper end oil passage holes 2-1-1 are open, and all of the circumferential lower end oil passage holes 2-1-2 are closed.
[0038] As shown in the drawings, Figure 9 and Figure 10 As shown in the drawings, the middle section core 3 comprises the main core punching sheet 2-1 and the circumferential oil channel punching sheet 3-1, and the plurality of main core punching sheets 2-1 and the plurality of circumferential oil channel punching sheets 3-1 are alternately stacked to form the middle section core 3; the circumferential lower end oil passage holes 2-1-2 on the plurality of main core punching sheets 2-1 of the middle section core 3 are aligned with each other, and the circumferential lower end oil passage holes 2-1-2 on the plurality of main core punching sheets 2-1 are also aligned with each other; and the outer diameter of the circumferential oil channel punching sheet 3-1 is less than that of the main core punching sheet 2-1, so that one or a plurality of adjacent circumferential oil channel punching sheets 3-1 and adjacent main core punching sheets 2-1 form a circumferential cooling oil circuit.
[0039] The core of the utility model is divided into two parts, namely the middle section core and the end oil-guiding core, the middle section core is formed by the main core punching sheet without angle rotation, all oil passage holes are aligned and stacked, and is matched with another punching sheet (the circumferential oil channel punching sheet 3-1) with an outer diameter less than the punching sheet to form the middle section core, and all oil holes are open; the end oil-guiding core is also formed by the main core punching sheet n+1 and sequentially rotates by an angle a corresponding to a tooth (assuming that the number of slots is S, and the angle corresponding to a tooth is a=360 / S) in the circumferential direction, and it needs to be noted that the rotation angle is based on the first section core and can sequentially rotate by angles a, 2a, 3a, …, na, or can be rotated in a disorderly manner.
[0040] The utility model discloses a design to the core punch piece, makes this punch piece can be used as middle section oil -conducting core, and can be used as end oil -conducting section core after being overlapped, further realizes reducing punch piece type, reduces the investment of grinding tool cost.
[0041] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0042] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model. The ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments in the range of the utility model without departing from the principles and purposes of the utility model. Any simple modification, equivalent change and modification of the above-mentioned embodiments according to the technical essence of the utility model still belong to the range of the technical scheme of the utility model.
Claims
1. An oil-cooled motor stator, comprising a winding and a stator core, wherein the stator core is provided with a winding slot (4), and the winding is inserted into the winding slot (4), characterized in that: The stator core comprises a middle section core (3) and end oil guide cores (2) arranged at both ends of the middle section core (3); the end oil guide core (2) is formed by stacking a plurality of main core punching sheets (2-1); notches are provided on the outer sides of the main core punching sheets (2-1); and the plurality of main core punching sheets (2-1) are deflected relative to each other so that part of the notches are closed; the middle section core (3) is formed by alternately stacking a plurality of main core punching sheets (2-1) and a plurality of circumferential oil channel punching sheets (3-1); an arc-shaped end oil guide sheet (1) is further provided on the end oil guide core (2); a plurality of oil outlets (1-2) are spaced apart on the end oil guide sheet (1), and the plurality of oil outlets (1-2) are communicated with corresponding notches on the end oil guide core (2); and an oil guide convex cap (1-1) is further provided on the end oil guide core (2) for spraying cooling oil toward the winding.
2. The oil-cooled motor stator according to claim 1, characterized in that: The end oil guide plate (1) is a thin iron base plate, and the end surface is stamped to bulge upward to form an oil guide convex cap (1-1), and the oil guide convex cap (1-1) forms an oil outlet (1-2) toward the inner diameter.
3. The oil-cooled motor stator according to claim 2, characterized in that: The included angle formed by the oil guide convex cap (1-1) and the end oil guide plate (1) is α, and α is 10°-80°.
4. The oil-cooled motor stator according to claim 1, characterized in that: Several notches in a sector-shaped area with a central angle of 120° to 150° on the outside of the main iron core punching sheet (2-1) are circumferential upper end oil through holes (2-1-1), and the notches in the remaining area on the outside of the main iron core punching sheet (2-1) are circumferential lower end oil through holes (2-1-2), and the density of the circumferential lower end oil through holes (2-1-2) is smaller than that of the circumferential upper end oil through holes (2-1-1).
5. The oil-cooled motor stator according to claim 4, characterized in that: A stator tooth is located between every two winding slots (4); a circumferential upper end oil hole (2-1-1) is provided corresponding to each stator tooth in a sector-shaped area with a central angle of 120° to 150° on the outside of the main iron core punching sheet (2-1); and n circumferential lower end oil holes (2-1-2) are evenly provided every several stator teeth in the remaining circumferential angle areas on the outside of the main iron core punching sheet (2-1).
6. An oil-cooled motor stator according to claim 4 or 5, characterized in that: The end oil-conducting iron core (2) is formed by rotating n+1 stacks of main iron core punching sheets (2-1) in sequence at corresponding angles based on the middle section iron core (3), so that most of the circumferential upper end oil through holes (2-1-1) are open and all of the circumferential lower end oil through holes (2-1-2) are closed.
7. The oil-cooled motor stator according to claim 1, characterized in that: The end oil-conducting iron core (2) is formed by rotating n+1 stacks of main iron core punching sheets (2-1) sequentially through angles a, 2a, 3a...na based on the middle section iron core (3), wherein a is the angle formed by two adjacent stator teeth.
8. The oil-cooled motor stator according to claim 1, characterized in that: The circumferential lower end oil through holes (2-1-2) on the plurality of main core punching sheets (2-1) of the middle section iron core (3) are aligned with each other, and the circumferential lower end oil through holes (2-1-2) on the plurality of main core punching sheets (2-1) are also aligned with each other.
9. The oil-cooled motor stator according to claim 1, characterized in that: The outer diameter of the circumferential oil channel punching sheet (3-1) is smaller than the outer diameter of the main iron core punching sheet (2-1), so that one or more adjacent circumferential oil channel punching sheets (3-1) and adjacent main iron core punching sheets (2-1) form a circumferential cooling oil channel.