A stator cooling structure for an oil-cooled motor
By introducing end ring oil injection holes and circulating oil channels into the stator cooling structure of the oil-cooled motor, all-round cooling of the stator core and windings is achieved, solving the problem of small cooling area in the existing technology and improving heat dissipation capacity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
- Filing Date
- 2025-07-08
- Publication Date
- 2026-06-30
AI Technical Summary
In the existing stator cooling structure of oil-cooled motors, the cooling oil can only cool the stator core at the outer ring position, resulting in a small cooling area, poor winding cooling effect, and insufficient heat dissipation capacity.
A stator cooling structure for an oil-cooled motor is designed. By setting oil spray holes and circulating oil channels on the end rings on both sides of the stator core, the cooling oil is diverted into the end rings and sprayed onto the top and middle of the winding respectively. The internal part of the stator core is cooled by the circulating oil channels, and the root of the winding is cooled when the oil flows in the circulating oil channels.
It improves the heat dissipation capacity of the stator core and windings, achieves all-round cooling of the windings, increases the cooling area, and improves the heat dissipation effect.
Smart Images
Figure CN224438610U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor cooling technology, and in particular to a stator cooling structure for an oil-cooled motor. Background Technology
[0002] The stator cooling structure commonly used in current oil-cooled motors employs the following method: after oil enters the main oil passage, a portion flows to the right oil spray ring, cooling the right winding through holes in the ring. The remaining oil flows through internal oil passages in the stator core to the other end of the winding, where it is then sprayed through holes in the oil spray ring for cooling. This method limits the cooling of the stator core to a point near the outer ring, resulting in a relatively small cooling area, poor cooling effect, and reduced heat dissipation capacity of the stator core and windings.
[0003] Based on the above background, a stator cooling structure for an oil-cooled motor is proposed to solve the problem. Utility Model Content
[0004] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description and other accompanying drawings.
[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a stator cooling structure for an oil-cooled motor.
[0006] To achieve the above objectives, the technical solution of this utility model is: a stator cooling structure for an oil-cooled motor, comprising: a stator core and windings, the windings being located on both sides of the stator core, and further comprising an oil inlet groove, a stator core oil groove, an end ring, an oil spray hole, an end ring oil outlet tooth, an end ring oil closing tooth, and a circulating oil channel. An oil inlet groove is installed on the stator core, and stator core oil grooves are opened on both sides of the oil inlet groove. An end ring is attached to both sides of the stator core and located on the side of the core oil groove. An oil spray hole is opened on the end ring, and an end ring oil outlet tooth and an end ring oil closing tooth are installed on the end ring at intervals. A circulating oil channel is opened on the stator core, and the end ring oil closing tooth is located on the side of the circulating oil channel.
[0007] In some embodiments, the end ring oil-closing teeth on both sides of the stator core are staggered.
[0008] In some embodiments, the end ring closing teeth on one side of the circulating oil passage correspond to the end ring on the other side, and the end ring outlet teeth on the other side correspond to the end ring on the other side.
[0009] In some embodiments, an oil outlet hole is provided on the lower side of the oil outlet teeth of the end ring.
[0010] In some embodiments, the injection holes are arranged in a group on the upper and lower sides of the end ring, and the diameter of the upper injection hole is smaller than that of the lower injection hole.
[0011] In some embodiments, the oil outlet teeth and the oil closing teeth of the end ring are arranged in a ring-like manner at intervals on the end ring.
[0012] In some embodiments, an oil collection groove is formed between the stator core and the end ring.
[0013] By adopting the above technical solution, the beneficial effects of this utility model are as follows: This utility model diverts the cooling oil to the end rings on both sides of the stator core. Part of the oil in the end rings is sprayed out through the oil spray holes and sprayed onto the top and middle of the windings on both sides respectively. The remaining oil enters the circulating oil channel through the blocking of the oil-closing teeth of the end ring. When flowing through the circulating oil channel, it cools and dissipates heat inside the stator core. The oil flows out of the circulating oil channel and enters the oil outlet teeth of the end ring on the other side. The oil outlet teeth of the end ring then guide the oil to flow to the root of the winding. This process, by setting several oil channels in the teeth or related positions of the stator core, cools the front end, middle end and root of the winding with the oil guided by the oil channels. At the same time, it can also cool the inside of the stator core, thereby improving the heat dissipation capacity of the inside of the stator core and the windings.
[0014] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.
[0015] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and figures.
[0016] To make the above-mentioned beneficial effects and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0018] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one or more embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.
[0020] Explanation of key figure labels:
[0021] Figure 1 This is a schematic diagram of the stator cooling structure of an oil-cooled motor according to the present invention.
[0022] Figure 2 This utility model Figure 1 A magnified schematic diagram of the structure of A in the diagram;
[0023] Figure 3 This is a side view cross-sectional structural diagram of the end ring of this utility model;
[0024] Figure 4 This utility model Figure 3 A magnified schematic diagram of the local structure of B in the diagram;
[0025] Figure 5 This is a partial structural schematic diagram of the stator core of this utility model;
[0026] Figure 6 This is a schematic diagram of the first type of oil passage flow structure of this utility model;
[0027] Figure 7 This is a schematic diagram of the second type of oil flow direction of this utility model;
[0028] Figure 8 This is a schematic diagram of the oil injection structure of the oil injection hole of this utility model.
[0029] Explanation of main attached diagram markings: Stator core-1, winding-2, oil inlet groove-3, stator core oil groove-4, end ring-5, oil spray hole-6, end ring oil outlet tooth-7, end ring oil closing tooth-8, circulating oil channel-9, oil outlet hole-10. Detailed Implementation
[0030] The following detailed description of the embodiments of this utility model, in conjunction with the accompanying drawings, will provide a thorough understanding of how this utility model uses technical means to solve technical problems and achieve technical effects, enabling its implementation. It should be noted that, provided there is no conflict, the various embodiments and features within them can be combined with each other, and all resulting technical solutions are within the protection scope of this utility model.
[0031] Furthermore, numerous specific details are set forth in the following description for illustrative purposes to provide a thorough understanding of the embodiments of this invention. However, it will be apparent to those skilled in the art that this invention may be practiced without the specific details or particular methods described herein.
[0032] Please see Figure 1-8 This utility model provides a stator cooling structure for an oil-cooled motor, including: a stator core 1 and a winding 2, with the winding 2 located on both sides of the stator core 1. It also includes an oil inlet groove 3, a stator core oil groove 4, an end ring 5, an oil spray hole 6, an end ring oil outlet tooth 7, an end ring oil closing tooth 8, and a circulating oil channel 9. The stator core 1 is equipped with an oil inlet groove 3, and the stator core oil groove 4 is opened on both sides of the oil inlet groove 3. The end ring 5 is attached to both sides of the stator core 1 and is located on the side of the oil groove 4. The end ring 5 is provided with an oil spray hole 6, and the end ring 5 is equipped with an end ring oil outlet tooth 7 and an end ring oil closing tooth 8 arranged at intervals. The stator core 1 is provided with a circulating oil channel 9, and the end ring oil closing tooth 8 is located on the side of the circulating oil channel 9.
[0033] During use, the cooling oil enters the oil inlet groove 3 on the stator core 1 and is then diverted through the stator core oil groove 4 to the end rings 5 on both sides of the stator core 1. Part of the oil in the end rings 5 is sprayed out through the oil spray holes 6, spraying onto the top and middle of the windings 2 on both sides respectively. The remaining oil is blocked by the oil closing teeth 8 of the end rings and enters the circulating oil channel 9. When it flows through the circulating oil channel 9, it cools and dissipates heat inside the stator core 1. The oil flows out of the circulating oil channel 9 and enters the oil outlet teeth 7 of the end ring 5 on the other side. The oil outlet teeth 7 then guide the oil to flow to the root of the winding 2, thereby providing oil cooling to different parts of the winding 2.
[0034] According to some embodiments of this application, optionally, the end ring closing teeth 8 on both sides of the stator core 1 are staggered, and the circulating oil channel 9 corresponds to the end ring closing teeth 8 on one side of the end ring 5 and the end ring outlet teeth 7 on the other side of the end ring 5. When the end ring closing teeth 8 on one side (left side) send oil into the circulating oil channel 9, the circulating oil channel 9 can guide the oil into the end ring outlet teeth 7 on the other side (right side). Similarly, when the end ring closing teeth 8 on the other side (right side) send oil into the circulating oil channel 9, the circulating oil channel 9 can guide the oil into the end ring outlet teeth 7 on one side (left side). Thus, the oil in the corresponding end ring outlet teeth 7 flows to the winding roots on both sides, so that the winding roots on both sides can be cooled, and the cooling area is more comprehensive.
[0035] According to some embodiments of this application, optionally, an oil outlet hole 10 is provided on the lower side of the oil outlet tooth 7 of the end ring. This serves to allow oil in the oil outlet tooth 7 of the end ring to flow to the root of the winding.
[0036] According to some embodiments of this application, optionally, the oil injection holes 6 are arranged in a group on the upper and lower sides of the end ring 5, and the diameter of the upper oil injection hole 6 is smaller than that of the lower oil injection hole 6. The oil sprayed by the higher, smaller diameter oil injection hole 6 can reach further, thus spraying the oil to the middle of the winding, while the oil sprayed by the lower, larger diameter oil injection hole 6 cools the top of the winding, thereby providing comprehensive cooling of the winding.
[0037] According to some embodiments of this application, optionally, the end ring oil outlet teeth 7 and the end ring oil closing teeth 8 are arranged in a ring-like pattern on the end ring 5 at intervals. This has the function of introducing oil for cooling the winding from all directions.
[0038] According to some embodiments of this application, optionally, an oil collection groove is formed between the stator core 1 and the end ring 5. When the oil flowing out of the stator core oil groove 4 enters the end ring 5, it flows into the oil collection groove and then splits into the oil injection hole 6 and the circulating oil channel 9.
[0039] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.
[0040] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.
[0041] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.
Claims
1. A stator cooling structure for an oil-cooled motor, comprising: The stator core (1) and winding (2) are located on both sides of the stator core (1). The stator core (1) is characterized by further including an oil inlet groove (3), a stator core oil groove (4), an end ring (5), an oil spray hole (6), an end ring oil outlet tooth (7), an end ring oil closing tooth (8), and a circulation oil channel (9). An oil inlet groove (3) is installed on the stator core (1). Stator core oil grooves (4) are opened on both sides of the oil inlet groove (3). An end ring (5) is attached to both sides of the stator core (1) and is located on the side of the core oil groove (4). An oil spray hole (6) is opened on the end ring (5). An end ring oil outlet tooth (7) and an end ring oil closing tooth (8) are installed on the end ring (5) at intervals. A circulation oil channel (9) is opened on the stator core (1). The end ring oil closing tooth (8) is located on the side of the circulation oil channel (9).
2. The stator cooling structure of an oil-cooled motor according to claim 1, characterized in that, The end ring oil-closing teeth (8) on both sides of the stator core (1) are staggered.
3. The stator cooling structure of an oil-cooled motor according to claim 2, characterized in that, The oil passage (9) has an end ring oil-closing tooth (8) on one side corresponding to the end ring (5) and an end ring oil-outlet tooth (7) on the other side corresponding to the end ring (5).
4. The stator cooling structure of an oil-cooled motor according to claim 1, characterized in that, An oil outlet hole (10) is provided on the lower side of the oil outlet tooth (7) of the end ring.
5. The stator cooling structure of an oil-cooled motor according to claim 1, characterized in that, The injection holes (6) are arranged in a group on the end ring (5), and the diameter of the upper injection hole (6) is smaller than that of the lower injection hole (6).
6. The stator cooling structure of an oil-cooled motor according to claim 1, characterized in that, The oil outlet teeth (7) and the oil closing teeth (8) of the end ring are arranged in a ring-shaped manner on the end ring (5).
7. The stator cooling structure of an oil-cooled motor according to claim 1, characterized in that, An oil collection groove is formed between the stator core (1) and the end ring (5).