Oil guide disc at end part of oil cooling motor

Abstract

The utility model relates to an oil cooling motor end portion oil guide disc comprising an annular body, a plurality of winding through holes are arranged on the annular body around the circle center at equal intervals, a yoke portion oil channel is arranged at the outer diameter position of the upper portion half circle of the annular body, and a notch oil channel is arranged at the position, close to the inner diameter position, of the lower portion half circle of the annular body. According to the oil guide disc, the yoke part oil duct is designed on the upper half part, the notch oil duct is designed on the lower plate part, the gravity action is fully utilized, cooling oil sprayed out of the end part is uniformly guided to the end part of a winding to cool the winding at the end part, and meanwhile, the cooling oil sprayed out of the winding or a notch is prevented from entering an air gap as much as possible; therefore, the oil stirring loss is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of permanent magnet synchronous drive motors for new energy vehicles, and particularly relates to an oil guide plate at the end of an oil-cooled motor. Background Art

[0002] With the development of new energy vehicles in China and even around the world, the demand for drive motors is increasing day by day. Both OEMs and motor suppliers have begun to lay out the new energy drive motor industry, and the competition is very fierce. Traditional water-cooled motors cool the stator through the built-in water channel in the casing, while most conventional oil-cooled motors place the oil channel at the outer diameter of the yoke. The above two cooling methods are far away from the heat source in the slot, and there is a large thermal resistance in the cooling path, which is not conducive to the heat dissipation of the winding; especially under high-speed conditions, the AC loss of the flat wire at the slot is very large, and traditional water cooling or oil cooling cannot dissipate the high heat at the slot in time, which will not only cause the temperature in the slot to be high and unevenly distributed, but also further increase the temperature of the rotor magnet. In severe cases, it will cause local failure of the insulation in the slot and demagnetization of the magnet, affecting the improvement of the motor power density. There is a double-layer cooling structure for the inner and outer diameters of the stator, that is, the axial oil channels are set at the stator yoke and the slot position. However, whether the cooling oil is sprayed from the yoke slot or the slot position, if there is no end oil guide, the cooling oil cannot be effectively sprayed to the end winding due to gravity, which leads to the situation that the local temperature of the end winding is high. In summary, how to effectively and evenly spray the cooling oil sprayed from the end to the end winding is of great significance to the heat dissipation performance of the motor. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide an oil guide plate at the end of an oil-cooled motor, which can make the motor stator cooled more evenly.

[0004] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0005] An oil guide plate at the end of an oil-cooled motor comprises an annular body, on which a plurality of winding through holes are arranged at equal intervals around the center of a circle, a yoke oil passage is provided at the outer diameter of the upper half circle of the annular body, and a notch oil passage is provided near the inner diameter of the lower half circle of the annular body.

[0006] As a preferred solution: the yoke oil passage comprises a yoke oil ring, a yoke radial oil passage and a yoke oblique oil outlet hole, and the yoke radial oil passage communicates with the yoke oil ring and the yoke oblique oil outlet hole.

[0007] As a preferred solution: the oblique oil outlet hole of the yoke is aligned with the outer diameter side of the winding through hole.

[0008] As a preferred solution: the oblique oil outlet hole of the yoke is in a triangular shape, and the oblique oil outlet hole of the yoke is inclined toward the inner diameter.

[0009] As a preferred solution: the notch oil passage comprises a notch oil ring, a T-shaped oil passage and an oil outlet hole in the gear, and the T-shaped oil passage connects the notch oil ring and the oil outlet hole in the gear.

[0010] As a preferred solution: the oil outlet hole in the tooth is arranged between two adjacent winding through holes and has the same distance from the inner and outer sides of the winding through holes.

[0011] As a preferred solution: a circle of bosses is provided at the inner diameter of the annular body for preventing cooling oil from entering the rotor.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The oil guide plate of the utility model is designed with a yoke oil channel on the upper part and a slot oil channel on the lower plate part, which fully utilizes the effect of gravity to evenly guide the cooling oil sprayed from the end to the end of the winding to cool the end winding, while at the same time avoiding as much as possible the cooling oil dripping from the winding or the slot from entering the air gap, thereby increasing the oil stirring loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0015] Figure 1 It is a structural schematic diagram of one side of the end oil guide plate of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the other side of the end oil guide plate of the utility model;

[0017] Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 4 yes Figure 3 A partial enlarged structural diagram of part A;

[0019] Figure 5 It is a schematic diagram of the cross-sectional structure of the utility model and the end winding.

[0020] The accompanying drawings are marked as: 1, yoke oil channel; 2, slot oil channel; 3, inner diameter boss; 1-1, yoke oil ring; 1-2, yoke radial oil channel; 1-3, yoke oblique oil outlet hole; 2-1, slot oil ring; 2-2, T-type oil channel; 2-3, oil outlet hole in the tooth. DETAILED DESCRIPTION

[0021] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0028] like Figures 1 to 5 As shown, an oil guide plate at the end of an oil-cooled motor comprises an annular body, on which a plurality of winding through holes 4 are arranged at equal intervals around the center of a circle, a yoke oil passage 1 is provided at the outer diameter of the upper half of the annular body, and a notch oil passage 2 is provided near the inner diameter of the lower half of the annular body. A circle of bosses 3 for preventing cooling oil from entering the rotor is provided at the inner diameter of the annular body. The inner diameter of the boss is provided with an inclination, and the cooling oil dripping from the winding falls through the boss in a direction away from the air gap, preventing the cooling oil from entering the air gap and reducing the oil stirring loss of the motor.

[0029] The yoke oil passage 1 includes a yoke oil ring 1-1, a yoke radial oil passage 1-2 and a yoke oblique oil outlet hole 1-3, wherein the yoke radial oil passage 1-2 connects the yoke oil ring 1-1 and the yoke oblique oil outlet hole 1-3. The yoke oblique oil outlet hole 1-3 is aligned with the outer diameter side of the winding through hole 4. The yoke oblique oil outlet hole 1-3 is triangular in shape, and the yoke oblique oil outlet hole 1-3 is inclined toward the inner diameter.

[0030] Yoke oil passage: The oil guide plate is divided into the upper and lower parts along the gravity direction. The cooling oil flows out of the yoke core axially and enters the outer diameter annular oil cavity (yoke oil ring 1-1) formed by the end oil guide plate, the core end face and the casing. The upper part is provided with radial oil passages (yoke radial oil passages 1-2) and oblique oil outlet holes (yoke oblique oil outlet holes 1-3). After the cooling oil is filled, it flows radially to the inner diameter and is finally sprayed from the oblique oil outlet holes to the outer diameter winding under the action of oil pressure.

[0031] The slot oil passage 2 includes a slot oil ring 2-1, a T-shaped oil passage 2-2 and a tooth oil outlet hole 2-3, wherein the T-shaped oil passage 2-2 connects the slot oil ring 2-1 and the tooth oil outlet hole 2-3. The tooth oil outlet hole 2-3 is arranged between two adjacent winding through holes 4 and has the same inner and outer distances as the winding through holes 4.

[0032] Notch oil passage: The oil guide plate is divided into the upper and lower parts along the gravity direction. The cooling oil flows out of the notch core axially and enters the inner diameter annular oil cavity (notch oil ring 2-1) formed by the end oil guide plate and the end face of the core. A radial oil passage (T-type oil passage 2-2) is opened on the radial teeth of the lower part to the middle section of the tooth, and an oil outlet hole (oil outlet hole 2-3 in the tooth) is opened in the middle of the tooth. After the cooling oil fills the annular oil cavity, it flows into the radial oil passage of the lower part and is finally sprayed into the end winding through the oil spray hole.

[0033] The structure of the utility model is finally formed as follows: the yoke cooling oil is sprayed from the oblique oil outlet holes 1-3 of the yoke in the upper half area to the outer diameter of the winding, and flows along the surface and gaps of the winding under the action of gravity, and finally falls into the return oil groove at the bottom of the motor; the slot cooling oil is sprayed from the oil outlet holes 2-3 in the teeth of the lower half area to the inside of the winding, and flows downward along the gaps inside the winding under the action of gravity, and finally falls back to the return oil groove at the bottom of the motor.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation 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.

[0035] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An oil guide plate at the end of an oil-cooled motor, comprising an annular body, on which a plurality of winding through holes (4) are arranged at equal intervals around the center of a circle, characterized in that: A yoke oil passage (1) is provided at the outer diameter of the upper half of the annular body, and a notch oil passage (2) is provided near the inner diameter of the lower half of the annular body.

2. The oil guide plate at the end of an oil-cooled motor according to claim 1, characterized in that: The yoke oil passage (1) comprises a yoke oil ring (1-1), a yoke radial oil passage (1-2) and a yoke oblique oil outlet hole (1-3); the yoke radial oil passage (1-2) is connected to the yoke oil ring (1-1) and the yoke oblique oil outlet hole (1-3).

3. The oil guide plate at the end of an oil-cooled motor according to claim 2, characterized in that: The oblique oil outlet hole (1-3) of the yoke is aligned with the outer diameter side of the winding through hole (4).

4. The oil guide plate at the end of an oil-cooled motor according to claim 2, characterized in that: The yoke oblique oil outlet hole (1-3) is in a triangular shape, and the yoke oblique oil outlet hole (1-3) is inclined toward the inner diameter.

5. The oil guide plate at the end of an oil-cooled motor according to claim 1, characterized in that: The notch oil passage (2) comprises a notch oil ring (2-1), a T-shaped oil passage (2-2) and an oil outlet hole (2-3) in a tooth, and the T-shaped oil passage (2-2) is connected to the notch oil ring (2-1) and the oil outlet hole (2-3) in the tooth.

6. The oil guide plate at the end of an oil-cooled motor according to claim 5, characterized in that: The oil outlet hole (2-3) in the tooth is arranged between two adjacent winding through holes (4) and has the same inner and outer distances from the winding through holes (4).

7. The oil guide plate at the end of an oil-cooled motor according to claim 1, characterized in that: A boss (3) is provided at the inner diameter of the annular body for preventing cooling oil from entering the rotor.

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