Buckle type oil guide ring at end part of oil cooling stator and stator assembly thereof
By designing a snap-on oil conduction ring, the problems of large volume, high cost and blocked gaps in the oil cooling solution of the motor stator end oil is solved, achieving more efficient cooling effect and low-cost sealing performance.
Patent Information
- Application Number
- CN202420821908.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-19
AI Technical Summary
In the oil cooling scheme at the end of the existing motor stator, the injection ring is large in size, high in cost, and the fixing method is complex and the problem of gaps and oil holes is easily blocked.
Using snap-type oil conduction ring, the oil conduction ring is circular, and the oil injection hole is distributed on the side wall. The stator core is connected by snap-on. The structure is simple and the sealing is good. The inner end of the oil injection hole is inclined to prevent blockage and volume Small and low cost.
Achieve more efficient cooling effects, reduce production costs, and improve installation and sealing performance, avoiding gaps and clogging problems in traditional oil injection rings.
Smart Images
Figure CN222282881U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a buckle-type oil guide ring at the end of an oil-cooling stator and a stator component thereof. Background Art
[0002] The high-temperature part of the motor is mainly concentrated at the end of the winding. The existing cooling solution for the end of the stator winding usually adopts oil cooling. The advantage of oil cooling is that the oil is non-conductive and non-magnetic, has good insulation properties, can directly contact the internal components of the motor, and penetrate into the rotor and stator windings for a more complete heat exchange, making the heat dissipation efficiency higher. The cooling effect is more obvious for flat wire winding motors with a large exposed area at the end, and the internal rotor components can be actively cooled. For hybrid systems, it is conducive to the integration of the motor and the gearbox, and improves the lubrication and cooling effect of the bearings. There are two main cooling solutions:
[0003] 1. Use an external oil pipe to cool the stator end windings with oil; this solution can only cool a local area of the winding package and takes up a large space;
[0004] 2. Add oil spray rings on both sides of the stator core to spray oil and cool the winding (such as Figure 7 As shown in the figure, most existing motors use this solution to spray the windings. However, fixing the oil guide plate by gluing is prone to gap problems in the subsequent process, and the sealing of the oil cavity needs to be considered; the oil hole is set on the end face, and the insulating paint is prone to block the oil hole during the paint dripping process; the oil spray ring is large in size and has a high cost. Summary of the invention
[0005] In order to solve the above problems, the first purpose of the utility model is to provide a snap-on oil guide ring at the end of an oil-cooled stator. The snap-on oil guide ring is smaller in volume than a traditional oil spray ring, has low cost, and is snap-on fixed, with a simple structure, good sealing, and easy installation. The oil spray holes are distributed on the side wall of the oil guide ring, with good centripetal property, and the axial oil path inside the stator core can be used to realize centripetal spray cooling of the coil inside the oil guide ring, with a simple structure. The second purpose of the utility model is to provide a stator assembly having the above-mentioned snap-on oil guide ring at the end of an oil-cooled stator.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:
[0007] A snap-on oil guide ring at the end of an oil-cooled stator, characterized in that: the oil guide ring is in a circular ring shape, an oil channel is constructed on one side of the oil guide ring, an oil injection hole communicating with the oil channel is constructed on the end face of the oil guide ring opposite to or adjacent to the oil channel, and the oil guide ring is provided with a plurality of snaps; a plurality of the oil injection holes are regularly arranged circumferentially on the oil guide ring, the outer end of the oil injection hole is an oil injection port facing the axis and formed on the inner wall of the oil guide ring, and the inner end of the oil injection hole is communicated with the oil channel. In this technical solution, the oil guide plate is configured as a circular ring-shaped oil guide ring, which has a simple structure, is easy to install, is smaller in size than a traditional oil injection ring, and has a low cost. In addition, the oil guide ring is integrally injection molded, the injection molding material is PPA, and the thickness of the oil guide plate is 5.5 mm. The oil guide ring is connected to the outside by snaps, which is simple to assemble, fits tightly, and has a good sealing effect.
[0008] Preferably, the inner end of the fuel injection hole is arranged downward relative to the fuel injection port and is constructed as an outwardly inclined oblique opening, and an inclined fuel injection channel is formed between the oblique opening and the fuel injection port.
[0009] Preferably, 16 oil injection holes are arranged.
[0010] In the above technical solution, 16 Φ2.3 oil spray holes are evenly distributed on the oil guide ring. The oil spray holes are formed on the inner wall of the oil guide ring and face the axis, which can prevent the insulating paint from blocking the oil holes during the paint dripping process. In addition, the centripetal property is better, and the axial oil path inside the stator core can be used inside the oil guide plate to realize centripetal spray cooling of the coil package, which has a simple structure. In addition, the flow rate and spray direction of the oil spray hole can be adjusted by the size of the oil spray hole and the slope of the (beveled mouth) to improve the spray effect.
[0011] Preferably, there are multiple oil passages, which are waist-shaped oil passages, and the waist-shaped oil passages are regularly formed at the lower end of the oil guide ring in a circumferential direction.
[0012] Preferably, there are 8 waist-shaped oil passages, and each waist-shaped oil passage corresponds to two oil injection holes.
[0013] In the above technical solution, there are 8 waist-shaped oil channels on the oil guide ring that cooperate with the external oil inlet channel. Through these 8 waist-shaped oil channels, the external oil inlet channel can be converted into 16 oil injection holes to spray oil toward the outer ring of the stator winding at a certain angle.
[0014] A stator assembly includes any one of the above-mentioned oil-cooled stator end snap-on oil guide rings, characterized in that it also includes a stator core, a plurality of hairpin conductors are inserted into the stator slots of the stator core for assembly, the oil guide ring is fitted on both side ends of the stator core, the outer diameter of the oil guide ring is adapted to the outer diameter of the stator core, and a plurality of slots are provided on the stator core to form a snap-on connection with a plurality of snaps on the oil guide ring.
[0015] Preferably, the outer edge of the lower end of the oil guide ring is provided with a plurality of clips in a regular circumferential direction downward, and the surface of the stator core is circumferentially constructed with a plurality of assembly grooves communicating with the end face of the stator core corresponding to the plurality of clips, and two clip grooves are formed on both sides of the outer side of the assembly groove close to the end face of the stator core, and the clip can slide into the assembly groove so that the positioning convex keys on both sides of the clip cooperate with the two clip grooves to form a clip connection.
[0016] Preferably, four buckles are arranged corresponding to the assembly grooves.
[0017] In the above technical solution, specifically, four clips with positioning cams are evenly distributed downward on the outer edge of the lower end of the oil guide ring, which are used to extend into the assembly groove of the stator core and assemble with the slot, so that the end face of the oil guide ring is circumferentially fitted and abutted against the end face of the stator core. The fixing method is stable and can be installed before the stator is shrink-fitted, which is convenient to install.
[0018] Preferably, an oil inlet groove is formed in the circumferential direction in the middle of the stator core, and multiple oil inlet holes are regularly opened on the side walls of both sides of the oil inlet groove. The multiple oil inlet holes extend along the axis to the end surface of the stator core to form multiple oil inlet channels. The oil channels are formed on one end of the oil guide ring that fits the stator core and communicate with the oil inlet channels. The multiple oil inlet holes are arranged corresponding to the oil channels; the oil injection holes are arranged on the outside of multiple hairpin conductors. In this technical solution, the oil enters the axial oil inlet channel on the stator core, passes through the waist-shaped oil channel of the oil guide ring, reaches the oil injection hole, and sprays oil toward the outer ring of the stator winding. Specifically, there are 88 oil inlet holes corresponding to 8 waist-shaped holes, and the spraying effect and efficiency are good. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the stator assembly.
[0020] Figure 2 for Figure 1 Enlarged view of point A in .
[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the oil guide ring.
[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the oil guide ring from another perspective.
[0023] Figure 5 Schematic diagram of the bottom structure of the oil guide ring.
[0024] Figure 6 for Figure 5 Schematic diagram of the AA cross-section structure.
[0025] Figure 7 It is a cross-sectional schematic diagram of an existing oil guide plate. DETAILED DESCRIPTION
[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0027] 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 device or element referred to 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.
[0028] 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.
[0029] 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.
[0030] 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. Embodiment 1:
[0031] like Figures 3 to 6 The oil guide ring 5 is a snap-on oil guide ring at the end of an oil-cooled stator. The oil guide ring 5 is annular, and an oil passage is constructed on one side of the oil guide ring 5. An oil injection hole 2 communicating with the oil passage is constructed on the end face of the oil guide ring 5 opposite to or adjacent to the oil passage. The oil guide ring 5 is provided with a plurality of snaps 4. The oil guide ring 5 is provided with a plurality of oil injection holes 2 in a regular manner in a circumferential direction. The outer end of the oil injection hole 2 is an oil injection port facing the axis and formed on the inner wall of the oil guide ring 5. The inner end of the oil injection hole 2 communicates with the oil passage. In this technical solution, the oil guide plate is configured as an annular oil guide ring, which has a simple structure, is easy to install, has a smaller volume than the traditional oil injection ring, and has a low cost. In addition, the oil guide ring is integrally injection molded, the injection molding material is PPA, and the thickness of the oil guide plate is 5.5 mm. The oil guide ring is connected to the outside by snaps, which is easy to assemble, fits tightly, and has a good sealing effect.
[0032] Furthermore, the inner end of the fuel injection hole 2 is arranged downward relative to the fuel injection port and is constructed as an outwardly inclined oblique opening 7, and an inclined fuel injection channel is formed between the oblique opening 7 and the fuel injection port.
[0033] Furthermore, there are 16 oil injection holes 2 arranged.
[0034] In the above technical solution, 16 Φ2.3 oil spray holes are evenly distributed on the oil guide ring. The oil spray holes are formed on the inner wall of the oil guide ring and face the axis, which can prevent the insulating paint from blocking the oil holes during the paint dripping process. In addition, the centripetal property is better, and the axial oil path inside the stator core can be used inside the oil guide plate to realize centripetal spray cooling of the coil package, which has a simple structure. In addition, the flow rate and spray direction of the oil spray hole can be adjusted by the size of the oil spray hole and the slope of the (beveled mouth) to improve the spray effect.
[0035] Furthermore, there are multiple oil passages, which are multiple waist-shaped oil passages 8 , and the multiple waist-shaped oil passages 8 are regularly formed at the lower end of the oil guide ring 5 in a circumferential direction.
[0036] Furthermore, there are eight waist-shaped oil passages 8 , and each waist-shaped oil passage 8 corresponds to two oil injection holes 2 .
[0037] In the above technical solution, there are 8 waist-shaped oil channels on the oil guide ring that cooperate with the external oil inlet channel. Through these 8 waist-shaped oil channels, the external oil inlet channel can be converted into 16 oil injection holes to spray oil toward the outer ring of the stator winding at a certain angle. Embodiment 2:
[0038] like Figures 1 to 6A stator assembly shown includes a snap-on oil guide ring at the end of an oil-cooled stator in Embodiment 1. The stator assembly also includes a stator core 1. A plurality of hairpin conductors 100 are inserted into stator slots of the stator core 1 for assembly. The oil guide ring 5 is fitted on both side ends of the stator core 1. The outer diameter of the oil guide ring 5 is adapted to the outer diameter of the stator core 1. A plurality of slots 3 are provided on the stator core 1 to form a snap-on connection with a plurality of snaps 4 on the oil guide ring 5.
[0039] Furthermore, the outer edge of the lower end of the oil guide ring 5 is provided with a plurality of the clips 4 in a regular circumferential direction downward, and the surface of the stator core 1 is circumferentially constructed with a plurality of assembly grooves 6 that are in communication with the end face of the stator core 1 corresponding to the plurality of clips 4. Two clip grooves 3 are formed on both sides of the outer side of the assembly groove 6 close to the end face of the stator core 1, and the clip 4 can slide into the assembly groove 6 so that the positioning convex keys on both sides of the clip 4 cooperate with the two clip grooves 3 to form a clip connection.
[0040] Furthermore, four buckles 4 are arranged corresponding to the assembly slots 6 .
[0041] In the above technical solution, specifically, four clips with positioning cams are evenly distributed downward on the outer edge of the lower end of the oil guide ring, which are used to extend into the assembly groove of the stator core and assemble with the slot, so that the end face of the oil guide ring is circumferentially fitted and abutted against the end face of the stator core. The fixing method is stable and can be installed before the stator is shrink-fitted, which is convenient to install.
[0042] Furthermore, an oil inlet groove 9 is formed in the circumferential direction in the middle of the stator core 1, and multiple oil inlet holes 10 are regularly opened in the circumferential direction on the side walls of both sides of the oil inlet groove 9. The multiple oil inlet holes 10 extend along the axis to the end surface of the stator core 1 to form multiple oil inlet channels. The oil channels are formed on one end of the oil guide ring 5 that fits the stator core 1 and communicates with the oil inlet channels. The multiple oil inlet holes 10 are arranged corresponding to the oil channels; the oil injection holes 2 are outside the multiple hairpin conductors 100. In this technical solution, the oil enters the axial oil inlet channel on the stator core, passes through the waist-shaped oil channel of the oil guide ring, reaches the oil injection hole, and sprays oil toward the outer ring of the stator winding. Specifically, there are 88 oil inlet holes corresponding to 8 waist-shaped holes, and the spraying effect and efficiency are good.
[0043] In this specific embodiment, in view of the problems that the oil guide plate used for oil cooling on the existing motor is difficult to assemble and has gaps, is large in size and high in cost, and the oil hole is easily blocked, the above scheme configures the oil guide plate into a circular oil guide ring, and the oil guide ring is connected to the stator core by a buckle, which is convenient to assemble, fits tightly, and has good sealing. In addition, the oil guide ring has a small size and low manufacturing cost. In addition, the oil injection port of the oil injection hole on the oil guide ring is formed on the inner wall, has good centripetal property, and the oil injection hole is not easy to be blocked when the winding is subjected to the paint dripping process.
[0044] 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.
[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative 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.
Claims
1. A snap-on oil guide ring at the end of an oil-cooled stator, characterized in that: The oil guide ring (5) is in a circular ring shape, an oil passage is formed on one side of the oil guide ring (5), an oil injection hole (2) communicating with the oil passage is formed on the end surface of the oil guide ring (5) opposite to or adjacent to the oil passage, and a plurality of buckles (4) are provided on the oil guide ring (5); a plurality of the oil injection holes (2) are regularly provided circumferentially on the oil guide ring (5), the outer ends of the oil injection holes (2) are oil injection ports facing the axis and formed on the inner wall of the oil guide ring (5), and the inner ends of the oil injection holes (2) communicate with the oil passage.
2. The oil-cooling stator end snap-on oil guide ring according to claim 1, characterized in that: The inner end of the oil injection hole (2) is arranged downward relative to the oil injection port and is constructed as an outwardly inclined oblique opening (7), with an inclined oil injection channel formed between the oblique opening (7) and the oil injection port.
3. The snap-on oil guide ring at the end of an oil-cooled stator according to claim 2, characterized in that: There are 16 oil injection holes (2) arranged.
4. The snap-on oil guide ring at the end of an oil-cooled stator according to claim 2, characterized in that: The oil passages are multiple and are multiple waist-shaped oil passages (8), and the multiple waist-shaped oil passages (8) are regularly formed in the circumferential direction at the lower end of the oil guide ring (5).
5. The snap-on oil guide ring at the end of an oil-cooled stator according to claim 4, characterized in that: There are eight waist-shaped oil passages (8) arranged, and each waist-shaped oil passage (8) corresponds to two oil injection holes (2).
6. A stator assembly, comprising an oil-cooled stator end snap-on oil guide ring as claimed in any one of claims 1 to 5, characterized in that: It also includes a stator core (1), a plurality of hairpin conductors (100) are inserted into stator slots of the stator core (1) for assembly, the oil guide ring (5) is fitted on both side ends of the stator core (1), the outer diameter of the oil guide ring (5) is adapted to the outer diameter of the stator core (1), and a plurality of slots (3) are provided on the stator core (1) to form a snap connection with a plurality of snaps (4) on the oil guide ring (5).
7. A stator assembly according to claim 6, characterized in that: The outer edge of the lower end of the oil guide ring (5) is provided with a plurality of the buckles (4) in a regular manner in the circumferential direction downwardly, and the surface of the stator core (1) is constructed with a plurality of assembly grooves (6) in the circumferential direction corresponding to the plurality of buckles (4) and communicating with the end surface of the stator core (1), and two clamping grooves (3) are formed on both sides of the outer side of the assembly groove (6) close to the end surface of the stator core (1), and the buckle (4) can slide into the assembly groove (6) so that the positioning convex keys on both sides of the buckle (4) cooperate with the two clamping grooves (3) to form a buckle connection.
8. A stator assembly according to claim 7, characterized in that: Four of the buckles (4) are arranged corresponding to the assembly grooves (6).
9. A stator assembly according to claim 7, characterized in that: An oil inlet groove (9) is formed circumferentially in the middle of the stator core (1), and a plurality of oil inlet holes (10) are regularly opened circumferentially on the side walls on both sides of the oil inlet groove (9). The plurality of oil inlet holes (10) extend along the axis to the end surface of the stator core (1) to form a plurality of oil inlet channels. The oil channels are formed on one end of the oil guide ring (5) that is attached to the stator core (1) and communicate with the oil inlet channels. The plurality of oil inlet holes (10) are arranged corresponding to the oil channels. The oil injection holes (2) are located outside the plurality of hairpin conductors (100).