Oil injection ring, stator assembly, motor and vehicle
By designing an injection ring with an optimized half-ring area and injection channel, the problem of insufficient spraying of motor cooling oil is solved, and efficient cooling of the stator winding is achieved.
Patent Information
- Application Number
- CN202420690452.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-03
AI Technical Summary
In the oil injection ring of existing motors, the pressure of cooling oil cannot be guaranteed, resulting in insufficient spraying of cooling oil and reducing the cooling efficiency of the stator winding.
An oil injection ring is designed, with the first side having two half-ring areas, and the area of the first inlet of the first injection passage near the top is greater than the area near the bottom, ensuring that the cooling oil can be quickly gathered and sprayed to the stator winding.
By optimizing the design of the oil injection ring, it is ensured that the cooling oil can be sprayed quickly from multiple directions to the stator winding, which improves cooling efficiency and avoids the problem of insufficient cooling oil spray caused by insufficient oil pressure.
Smart Images
Figure CN222654977U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of motors, and in particular to an oil injection ring, a stator assembly, a motor and a vehicle. Background Art
[0002] The motor of an electric vehicle is an important part of the vehicle. The heat dissipation performance of the motor determines the performance of the motor itself, thus ensuring the quality of the vehicle. In the related art, most motors cool the stator winding at the end of the stator by spraying with an oil spray ring. However, since the pressure of the cooling oil at different positions in the oil spray ring cannot be guaranteed, the cooling oil sprayed from the oil spray ring may not be fully sprayed on the stator winding from multiple directions, thereby reducing the cooling efficiency of the oil spray ring on the stator winding, and further affecting the performance of the motor. Utility Model Content
[0003] An object of the present disclosure is to provide an oil spray ring, a stator assembly, a motor and a vehicle, so as to enable cooling oil to be sufficiently sprayed onto the stator winding, so as to at least partially solve the above technical problems.
[0004] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides an oil injection ring, including a body, the body having a first side surface facing the stator core and a second side surface facing the stator winding, the first side surface including two first half-ring areas, the first half-ring area having a first end and a second end connected to the other first half-ring area, the body having a first oil injection channel, the first oil injection channel having a first inlet formed on the first half-ring area and a first outlet formed on the second side surface; the first end is located at the top end of the body, and the second end is located at the bottom end of the body; of the adjacent two first inlets of the adjacent two first oil injection channels on at least one of the first half-ring areas, the area of the first inlet close to the first end is larger than the area of the first inlet close to the second end.
[0005] Optionally, the second side surface includes two second semi-ring areas, the first outlet of the first injection channel is located on the second semi-ring area adjacent to the first semi-ring area where the first inlet is located, and among the adjacent two first outlets of two adjacent first injection channels on at least one of the second semi-ring areas, the area of the first outlet close to the first end is larger than the area of the first outlet close to the second end.
[0006] Optionally, an area of the first inlet of the first oil injection channel is larger than an area of the first outlet.
[0007] Optionally, the main body also includes a second oil injection channel, the second oil injection channel includes a cavity, a second inlet connected to the cavity is provided on the first semi-ring area, a second outlet connected to the cavity is provided on the second side, and the second inlet and the second outlet are connected at the junction of the first side and the second side.
[0008] Optionally, the second oil injection channel is located between the first end of the first semi-ring area and the first inlet adjacent to the first end.
[0009] Optionally, an arcuate flow channel is provided on at least one of the first semi-ring areas, the arcuate flow channel extends along the circumference of the fuel injection ring, the arcuate flow channel connects at least two of the first fuel injection channels, and the first inlets of the at least two first fuel injection channels are formed on the bottom wall of the arcuate flow channel; and / or the arcuate flow channel connects at least one of the cavities and at least one of the first fuel injection channels, and the second inlet of the at least one of the cavities and the first inlet of the at least one first fuel injection channel are formed on the bottom wall of the arcuate flow channel.
[0010] Optionally, a stator oil inlet port for communicating with a stator oil inlet passage of the stator core is provided at the first end.
[0011] According to a second aspect of the present disclosure, a stator assembly is provided, comprising a stator core and the above-mentioned oil injection ring, wherein the oil injection ring is provided at both ends of the stator core in the axial direction, and the stator core has a flow channel structure, and the flow channel structure is connected to the first oil injection channel.
[0012] Optionally, the stator core includes a plurality of stator core segments stacked along the axial direction, the stator core segments having a first flow channel extending along the circumferential direction and a second flow channel extending along the axial direction, and two adjacent stator core segments are staggered at a preset angle along the circumferential direction so that at least one of the first flow channels of one of the stator core segments is connected to at least one of the second flow channels of another of the stator core segments, and the first oil injection channel of the oil injection ring is connected to the first flow channel or the second flow channel of the adjacent stator core segment.
[0013] Optionally, from one end of the stator core to the other end along the axial direction, the stator core segments at odd positions form a first group of stator core segments, and the stator core segments at even positions form a second group of stator core segments, and the second group of stator core segments are staggered by the preset angle in the circumferential direction relative to the first group of stator core segments to form a stator oil inlet channel extending along the axial direction, and the stator oil inlet channel is connected to the stator oil inlet port of the injection ring.
[0014] Optionally, the stator core segment includes one or more stator punching sheets stacked in the axial direction, and the stator punching sheets include a first flow channel structure for forming the first flow channel and a second flow channel structure for forming the second flow channel.
[0015] Optionally, the stator punching sheet includes a first fan ring area and a second fan ring area which are connected to each other, the first flow channel structure is formed on the first fan ring area, the second flow channel structure is formed on the second fan ring area, the central angle of the first fan ring area is 180°-270°, and the central angle of the second fan ring area is 90°-180°.
[0016] According to a third aspect of the present disclosure, a motor is provided, comprising a housing and the above-mentioned stator assembly, wherein the housing has a cavity and a housing cooling oil channel, the stator assembly is arranged in the cavity, the housing cooling oil channel has an oil inlet and at least two first oil outlets respectively located at two axial ends of the stator assembly, the first oil outlets are connected to the flow channel structure of the stator core through the stator oil inlet on the adjacent oil injection ring.
[0017] Optionally, the housing has two bearing chambers respectively located at two ends of the stator assembly, and the housing cooling oil channel has a second oil outlet communicated with the bearing chambers.
[0018] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned motor.
[0019] Through the above technical scheme, the first inlet near the second end of the oil injection ring of the present invention is smaller, which can appropriately reduce the flow rate of cooling oil flowing into the oil injection ring from one side of the stator core, so that the cooling oil can be quickly gathered after flowing into the stator core, and then enter all the first oil injection channels of the main body in a short time, so as to quickly spray the stator winding from multiple directions, thereby improving the cooling effect; at the same time, since the area of the first inlet near the second end is smaller, the cooling oil in this area can also obtain a faster flow rate under the same oil pressure, so as to ensure that the cooling oil sprayed from the first outlet can be sprayed on the stator winding in full or nearly in full, reducing or even avoiding the situation of insufficient cooling oil spraying due to insufficient oil pressure; in addition, the area of the first inlet near the first end of the main body is larger, so that more cooling oil can be poured down from the top of the stator winding under the action of oil pressure and gravity, thereby improving the cooling efficiency.
[0020] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:
[0022] Figure 1 This is a schematic diagram of the first angle structure of the fuel injection ring provided in the first embodiment of the present disclosure;
[0023] Figure 2 is a schematic diagram of the structure of the fuel injection ring provided in the first embodiment of the present disclosure from a second angle;
[0024] Figure 3 is a schematic diagram of the structure of the oil injection ring provided in the second embodiment of the present disclosure;
[0025] Figure 4 is a structural schematic diagram of a stator assembly provided in an embodiment of the present disclosure;
[0026] Figure 5 is a schematic structural diagram of a stator core provided in an embodiment of the present disclosure;
[0027] Figure 6 It is a schematic diagram of the first angle structure of a stator punching sheet or a stator core segment provided in an embodiment of the present disclosure;
[0028] Figure 7 is a schematic diagram of a second angle structure of a stator punching sheet or a stator core segment provided in an embodiment of the present disclosure;
[0029] Figure 8 is a cross-sectional exploded view of a motor provided by an embodiment of the present disclosure;
[0030] Fig. 9 It is a cross-sectional assembly diagram of the motor provided in an embodiment of the present disclosure.
[0031] Description of Reference Numerals
[0032] 1-main body; 2-first side; 21-first half ring area; 3-second side; 31-second half ring area; 4-first end; 5-second end; 6-first oil injection channel; 61-first inlet; 62-first outlet; 7-second oil injection channel; 71-cavity; 72-second inlet; 73-second outlet; 8-arc flow channel; 9-stator oil inlet; 10-stator core; 11-stator core segment; 111-first flow channel; 112-second flow channel; 12-stator oil inlet channel; 13-stator punching sheet; 131-first flow channel structure; 132-second flow channel structure; 133-first fan ring area; 134-second fan ring area; 14-housing; 141-cavity; 142-housing cooling oil channel; 143-oil inlet; 144-first oil outlet; 145-bearing chamber; 146-second oil outlet; 15-stator winding. DETAILED DESCRIPTION
[0033] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.
[0034] In the present disclosure, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the relative "upper" and "lower" in the direction of gravity when the corresponding components are in use. Figure 2 In the direction of the drawing shown, "inside and outside" refer to the "inside and outside" relative to the contour of the corresponding component itself; "top and bottom" refer to the "top and bottom" of the motor with this stator core during normal use after the injection ring of the present disclosure is matched and connected with the stator core. In addition, the terms "first", "second", "third", etc. used in the present disclosure are to distinguish one element from another, and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.
[0035] The fuel injection ring, the stator assembly and the motor in the exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings.
[0036] refer to Figures 1 to 9 As shown, in the first aspect of the present disclosure, there is provided an oil injection ring, comprising a body 1, the body 1 having a first side surface 2 facing the stator core 10 and a second side surface 3 facing the stator winding 15, the first side surface 2 comprising two first semi-ring areas 21, the first semi-ring area 21 having a first end 4 and a second end 5 connected to the other first semi-ring area 21, the body 1 having a first oil injection channel 6, the first oil injection channel 6 having a first inlet 61 formed on the first semi-ring area 21 and a first outlet 62 formed on the second side surface 3; the first end 4 is located at the top end of the body 1, and the second end 5 is located at the bottom end of the body; of the adjacent two first inlets 61 of the adjacent two first oil injection channels 6 on at least one first semi-ring area 21, the area of the first inlet 61 close to the first end 4 is larger than the area of the first inlet 61 close to the second end 5.
[0037] The first side surface 2 of the main body 1 of the oil injection ring of the present invention faces the stator core 10, so the cooling oil on the stator core 10 can pass through the first inlet 61 located on the first side surface 2 and the first outlet 62 located on the second side surface 3 in sequence to cool the stator winding 15. The cooling oil on the stator core 10 will flow along the circumference of the stator core 10 to the bottom of the stator core 10 and gather. In this process, part of the cooling oil will enter the first oil injection channel 6 of the oil injection ring. The flow rate of the cooling oil passing through the first inlet 61 with a relatively small area is greater than the flow rate of the cooling oil through the first inlet 61 with a relatively large area. Based on this, the cooling oil passing through the first inlet 61 close to the second end 5 can have a faster flow rate to ensure that the cooling oil sprayed from the first outlet 62 can be completely or nearly completely sprayed onto the stator winding 15, reducing or even avoiding the cooling oil caused by Insufficient oil pressure leads to insufficient cooling oil spraying; in addition, the first inlet 61 near the second end 5 is smaller, which can also reduce the flow rate of the cooling oil flowing into the oil spray ring when the cooling oil initially gathers at the bottom of the stator core 10, so that the cooling oil on the stator core 10 can quickly gather to the top of the stator core 10, ensuring that the cooling oil can enter all the first oil spray channels 6 of the oil spray ring in a short time, so as to quickly spray the stator winding 15 from multiple directions to improve the cooling effect; in addition, the first inlet 61 near the first end 4 of the main body 1 has a larger area, which can make more cooling oil pour down from the top of the stator winding 15 under the action of oil pressure and gravity, thereby cooling the stator winding 15 in an oil bath, so as to improve the cooling efficiency under the joint action of the cooling oil sprayed from the remaining first oil spray channels 6.
[0038] In some embodiments of the present disclosure, Figure 1 and Figure 3 As shown, the second side surface 3 includes two second semi-ring areas 31, and the first outlet 62 of the first oil injection channel 6 is located on the second semi-ring area 31 adjacent to the first semi-ring area 21 where the first inlet 61 is located. Among the adjacent two first outlets 62 of two adjacent first oil injection channels 6 on at least one second semi-ring area 31, the area of the first outlet 62 close to the first end 4 is larger than the area of the first outlet 62 close to the second end 5. The first outlet 62 can be arranged in the same manner as the first inlet 61, that is, in the same semi-ring area, the areas of the first inlet 61 and the first outlet 62 are gradually reduced from the side close to the first end 4 to the side close to the second end 5, so that the first outlet 62 can play the same role as the first inlet 61, so that the oil injection ring can improve the cooling efficiency of the stator winding 15 under the joint action of the first inlet 61 and the first outlet 62.
[0039] Among them, the area of the first inlet 61 of the first oil injection channel 6 is larger than the area of the first outlet 62. At this time, the first oil injection channel 6 is in an inverted cone shape, and the area of the first outlet 62 is reduced as much as possible. This can make the cooling oil on the stator core 10 accumulate faster and increase the spray distance of the cooling oil, so as to further enhance the spray effect of the cooling oil and the oil bath effect of cooling the stator winding 15 from the top, thereby ensuring the cooling efficiency.
[0040] Of course, in the same first fuel injection channel 6, the area of the first inlet 61 may be smaller than the area of the first outlet 62 to form a conical first fuel injection channel 6, or the areas of the first inlet 61 and the first outlet 62 may be the same to form a cylindrical first fuel injection channel 6, which is not limited in the present disclosure.
[0041] In some embodiments, Figures 1 to 3 As shown, the body 1 also includes a second oil injection channel 7, which includes a cavity 71, a second inlet 72 communicating with the cavity 71 is provided on the first semi-ring region 21, and a second outlet 73 communicating with the cavity 71 is provided on the second side 3, and the second inlet 72 and the second outlet 73 are communicated at the junction of the first side 2 and the second side 3. Figure 1 and Figure 3 As shown, the second inlet 72 arranged on the first side 2 can be extended from the junction of the first side 2 and the second side 3 in the direction away from the second side 3 to form a rectangular second inlet 72 on the first side 2, and the second outlet 73 arranged on the second side 3 can be extended from the junction of the first side 2 and the second side 3 in the direction away from the first side 2 to form a rectangular second outlet 73 on the second side 3. With this arrangement, the cooling oil on the stator core 10 can immediately enter the cavity 71 through the second inlet 72 when flowing to the edge of the oil injection ring and then flow out of the cavity 71 through the second outlet 73, thereby cooling the stator winding 15. This can speed up the flow rate of the cooling oil and improve the cooling efficiency. In addition, the cooling oil will not accumulate in the second inlet 72 and the cavity 71, so that more cooling oil can flow out from the second oil injection channel 7 and cool the stator winding 15, thereby improving the cooling effect.
[0042] It should be noted that the second inlet 72 and the second outlet 73 can be constructed in any shape, such as an arc, a trapezoid, a triangle, etc., as long as they can be connected at the junction of the first side surface 2 and the second side surface 3 to achieve the effect of improving the cooling efficiency.
[0043] In some embodiments of the present disclosure, Figures 1 to 3As shown, the second oil injection channel 7 can be located between the first end 4 of the first half ring area 21 and the first inlet 61 adjacent to the first end 4. That is, the second oil injection channel 7 can be located on one side of the first end 4 and arranged adjacent to the first end 4, or two second oil injection channels 7 can also be provided, which are respectively arranged adjacent to both sides of the first end 4. Since the first end 4 is located at the top of the oil injection ring, that is, the second outlet 73 is located above the stator winding 15. Based on this, when the cooling oil cools the stator winding 15 through the oil injection ring, in addition to part of the cooling oil being sprayed out from the first oil injection channel 6 to cool the stator winding 15 from multiple directions, a large amount of cooling oil will pour down from the top of the stator winding 15, and the stator winding 15 is cooled together with the first oil injection channel 6 in an oil bath manner, thereby further ensuring the cooling effect of the oil injection ring on the stator winding 15.
[0044] In some embodiments not shown, the second oil injection channel 7 can be arranged between two adjacent first oil injection channels 6 in the same half-ring area, or the second oil injection channel 7 can also be alternately arranged with the first oil injection channel 6 in the same half-ring area. In addition, since the flow rate of the cooling oil through the second oil injection channel 7 is greater than the flow rate of the cooling oil through the first oil injection channel 6, in order to enable the cooling oil of the second oil injection channel 7 near the second end to be sprayed out from the second outlet 73 and sprayed onto the stator winding 15, it should be ensured that the cooling oil near the second end 5 has sufficient oil pressure and flow rate.
[0045] In some embodiments, the flow channel structure (to be described below) of the stator core may be partially formed by a through hole, and the through hole may not be able to cooperate with the first inlet 61 and the second inlet 72. Based on this, in order to prevent the outlet of the partial flow channel structure arranged on the stator core 10 from being in contact with the first side surface 2 and blocking the circulation of cooling oil, an arcuate flow channel 8 is arranged on at least one first semi-ring area 21, and the arcuate flow channel 8 extends along the circumference of the injection ring. The arcuate flow channel 8 connects at least two first injection channels 6, and the first inlets 61 of at least two first injection channels 6 are formed on the bottom wall of the arcuate flow channel 8; and / or the arcuate flow channel 8 connects at least one cavity 71 and at least one first injection channel 6, and the second inlet 72 of at least one cavity 71 and the first inlet 61 of at least one first injection channel 6 are formed on the bottom wall of the arcuate flow channel 8. In this way, the outlet of the flow channel structure previously arranged on the stator core 10 and fitting with the first side surface 2 will be directly connected to the arc flow channel 8, so that the cooling oil enters the first inlet 61 and / or the second inlet 72 arranged on the bottom wall of the arc flow channel 8 and flows out from the oil injection ring through the first outlet 62 and / or the second outlet 73 to cool the stator winding 15.
[0046] Among them, Figure 1In the first embodiment shown, the arc-shaped flow channel 8 may be a groove with an opening on the first side 2, or, as shown in FIG. Figure 3 In the second embodiment shown, the arcuate flow channel 8 may also have an opening on the first side surface 2 and a notch on the side wall away from the first outlet 62 and the second outlet 73. Since the oil injection ring can be connected to the motor housing 14, for example, by an interference fit, the arcuate flow channel 8 can cooperate with the inner wall of the housing 14, so that after the cooling oil enters the arcuate flow channel 8, it can be sprayed out through the first oil injection channel 6 and the second oil injection channel 7.
[0047] In some embodiments of the present disclosure, Figures 1 to 3 As shown, a stator oil inlet 9 for communicating with the stator oil inlet channel 12 of the stator core 10 is provided at the first end 4. The stator oil inlet 9 is provided at the first end 4, which is equivalent to the cooling oil entering the flow channel structure of the stator core 10 from both ends of the stator core 10. On the one hand, the circulation speed of the cooling oil can be accelerated to ensure the cooling effect. On the other hand, the collision of the two cooling oils in the flow channel structure will also generate turbulence. Compared with the laminar flow with a relatively gentle flow state, the turbulent flow has a faster flow speed, which can enhance the heat exchange effect and improve its cooling efficiency.
[0048] In the second aspect of the present disclosure, Figure 4 and Figure 5 As shown, a stator assembly is provided, including a stator core 10 and the above-mentioned oil injection ring, the stator core 10 is provided with an oil injection ring at both ends in the axial direction, and the stator core 10 has a flow channel structure, and the flow channel structure is connected to the first oil injection channel 6. The stator assembly has all the beneficial effects of the oil injection ring, and the present disclosure will not be repeated here.
[0049] In some embodiments of the present disclosure, Figure 5 As shown, the stator core 10 includes a plurality of stator core segments 11 stacked in the axial direction, the stator core segment 11 having a first flow channel 111 extending in the circumferential direction and a second flow channel 112 extending in the axial direction, and two adjacent stator core segments 11 are staggered in the circumferential direction by a preset angle so that at least one first flow channel 111 of one stator core segment 11 is connected with at least one second flow channel 112 of another stator core segment 11, and the first oil injection channel 6 of the oil injection ring is connected to the first flow channel 111 or the second flow channel 112 of the adjacent stator core segment 11, so that the cooling oil on the stator core can flow into the first oil injection channel 6 of the oil injection ring and spray the stator winding 15 through the first oil injection channel 6. Since the first flow channel 111 extends along the circumferential direction of the stator core segment 11, the second flow channel 112 extends along the axial direction of the stator core segment 11, and the first flow channel 111 and the second flow channel 112 are interconnected, the cooling oil in the first flow channel 111 and the second flow channel 112 will intersect with each other during the flow to form turbulence, thereby improving the cooling effect of the cooling oil.
[0050] It should be noted that the extension direction of the first flow channel 111 is not limited to the circumferential extension along the stator core segment 11, and the extension direction of the second flow channel 112 is not limited to the axial extension along the stator core segment 11. The two can extend along any angle as long as the cooling oil in the first flow channel 111 and the second flow channel 112 can intersect to form turbulence.
[0051] In some embodiments, Figure 5 As shown, from one end to the other end of the stator core 10 in the axial direction, the stator core segments 11 at odd positions form a first group of stator core segments, and the stator core segments 11 at even positions form a second group of stator core segments. The second group of stator core segments are staggered at a preset angle in the circumferential direction relative to the first group of stator core segments to form a stator oil inlet channel 12 extending in the axial direction, and the stator oil inlet channel 12 is connected to the stator oil inlet port 9 of the injection ring. That is, a partial area of the first flow channel 111 arranged in the circumferential direction forms a stator oil inlet channel 12 connected to the stator oil inlet port 9 in the axial direction, and the cooling oil flowing out of the stator oil inlet port 9 first flows into the stator oil inlet channel 12. At the same time, part of the cooling oil will flow along the first flow channel 111 in the circumferential direction of the stator core 10. In this process, part of the cooling oil will also flow along the second flow channel 112 in the axial direction, so that the cooling oil in the first flow channel 111 and the second flow channel 112 intersect with each other to form turbulence, thereby improving the cooling efficiency. It should be noted that the preset angle at which the second group of stator core segments are staggered in the circumferential direction relative to the first group of stator core segments is less than or equal to 180°.
[0052] Among them, Figure 6 and Figure 7 As shown, the stator core segment 11 includes one or more stator punching sheets 13 stacked in the axial direction, and the stator punching sheets 13 include a first flow channel structure 131 for forming a first flow channel 111 and a second flow channel structure 132 for forming a second flow channel 112. Specifically, the first flow channel structure 131 can be configured as an arc groove extending in the circumferential direction of the stator punching sheet 13, and the bottom wall of the arc groove forms the first flow channel 111 that enables the cooling oil to flow in the circumferential direction of the stator core 10; the second flow channel structure 132 can be configured as a through hole that penetrates the stator punching sheet in the axial direction, and the through hole arranged in the axial direction forms the second flow channel 112 that enables the cooling oil to flow in the axial direction of the stator core 10; the cooling oil entering the stator core 10 will flow along the bottom wall of the arc hole and the opening direction of the through hole, thereby forming turbulence on the flow channel structure of the stator core 10.
[0053] In addition, the stator sheet 13 includes a first fan ring area 133 and a second fan ring area 134 which are connected to each other, a first flow channel structure 131 is formed on the first fan ring area 133, and a second flow channel structure 132 is formed on the second fan ring area 134. The central angle of the first fan ring area 133 is 180°-270°, and the central angle of the second fan ring area 134 is 90°-180°. When the sum of the central angles of the first fan ring area and the second fan ring area is 360°, the cooling effect of the cooling oil on the stator core 10 formed by the stator sheet 13 is the best. It should be noted that the outer diameter of the first fan ring area 133 can be smaller than the outer diameter of the second fan ring area 134, so that the peripheral wall of the first fan ring area 133 and the side wall formed on the second fan ring area 134 adjacent to the peripheral wall jointly form the first flow channel structure 131.
[0054] The third aspect of the present disclosure provides a motor, including a housing 14 and the above-mentioned stator assembly, wherein the housing 14 has a cavity 141 and a housing cooling oil passage 142, wherein the stator assembly is disposed in the cavity 141, and the housing cooling oil passage 142 has an oil inlet 143 and at least two first oil outlets 144 respectively located at two ends of the stator assembly along the axial direction, wherein the first oil outlets 144 are connected to the flow channel structure of the stator core 10 through the stator oil inlet 9 on the adjacent oil injection ring. After passing through the housing cooling oil passage 142, the cooling oil will be divided into two paths and enter the oil injection rings located at the two ends of the stator core 10, so that the cooling oil can enter the stator core 10 from both ends, thereby making the collision of the two cooling oils more violent when they meet in the flow channel structure, thereby improving the flow rate and heat conduction efficiency of the cooling oil after the laminar flow state is transformed into the turbulent flow state, thereby improving the cooling effect.
[0055] Of course, the first oil outlet of the housing cooling oil channel 142 may also be directly connected to the flow channel structure of the stator core 10 , and one or more first oil outlets 144 may be provided.
[0056] In addition, the motor of the present disclosure has all the benefits of the above-mentioned stator assembly, which will not be described in detail herein.
[0057] In some embodiments of the present disclosure, the housing 14 has two bearing chambers 145 respectively located at both ends of the stator assembly, and the housing cooling oil channel has a second oil outlet 146 connected to the bearing chamber 145, that is, the cooling oil can also flow into the bearing chamber to lubricate the bearing to ensure the normal operation of the motor.
[0058] A fourth aspect of the present disclosure provides a vehicle including the above-mentioned motor, and the vehicle has all the beneficial effects of the above-mentioned motor, which will not be elaborated in the present disclosure.
[0059] In summary, the present disclosure will exemplarily illustrate the cooling process of the oil injection ring and the stator assembly by the cooling oil.
[0060] The cooling oil first flows from the first oil outlet 144 of the housing cooling oil channel 142 through the stator oil inlet 9 on the oil injection rings at both ends of the stator core 10 into the stator oil inlet channel 12 of the stator core 10. The cooling oil flowing out of the two oil injection rings converges on the stator oil inlet channel 12 to form turbulence. At the same time, part of the cooling oil flows along the first flow channel 111 in the circumferential direction of the stator core 10 until it accumulates at the bottom of the stator core 10. The accumulated cooling oil flows along the second flow channel 112 in the axial direction of the stator core. The cooling oil intersecting in the first flow channel 111 and the second flow channel 112 also forms turbulence to enhance the cooling effect of the cooling oil on the stator core 10. The cooling oil flowing in the first flow channel 111 and the second flow channel 112 will eventually flow into the body 1 of the oil injection ring through the first oil injection channel 6, the second oil injection channel 7 or the arc flow channel 8, and cool the stator winding 15. For example, when the first flow channel 111 of the stator core segment 11 close to the body is arranged opposite to the first side surface 2, part of the cooling oil in the first flow channel 111 will enter the body 1 through the first inlet 61 and the second inlet 72 and cool the stator winding 15 through the first outlet 62 and the second outlet 73; when the second flow channel 112 of the stator core segment 11 close to the body 1 is arranged opposite to the first side surface 2, part of the cooling oil in the second flow channel 112 will first flow into the body 1 through the first inlet 61 and the second inlet 72 and cool the stator winding 15 through the first outlet 62 and the second outlet 73. The stator winding 15 is cooled through the arc-shaped flow channel 8 and the first inlet 61 and the second inlet 72 on the arc-shaped flow channel 8. In this process, since the first inlet 61 and the first outlet 62 near the second end 5 of the body 1 are small in area, the cooling oil can be quickly gathered in the stator core 10 and then enter all the first oil injection channels 6 and the second oil injection channels 7 of the body 1. In addition to spraying the stator winding 15 from multiple directions, the first oil injection channel 6 located near the first end 4 is above the stator winding 15, and the stator winding 15 can also be cooled by oil bathing. In addition, the oil bath effect The better second oil injection channel 7 works together to greatly improve the cooling effect of the cooling oil on the stator winding 15; in addition, the first inlet 61 and the first outlet 62 with smaller areas also enable the cooling oil in this area to obtain a faster flow rate under the same oil pressure, so as to ensure that the cooling oil sprayed from the first outlet 62 can be sprayed all or nearly all onto the stator winding 15, reducing or even avoiding the situation where the cooling oil is not sprayed sufficiently due to insufficient oil pressure; in addition, the first inlet 61 close to the first end 4 of the main body has a larger area, which can allow more cooling oil to pour down from the top of the stator winding 15 under the action of oil pressure and gravity, thereby improving the cooling efficiency.
[0061] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0062] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.
[0063] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.
Claims
1. A fuel injection ring, characterized in that: The invention comprises a body, wherein the body has a first side surface facing the stator core and a second side surface facing the stator winding, wherein the first side surface comprises two first half-ring regions, wherein the first half-ring region has a first end connected to the other first half-ring region and a second end, and the body has a first oil injection passage, wherein the first oil injection passage has a first inlet formed on the first half-ring region and a first outlet formed on the second side surface; The first end is located at the top end of the body, and the second end is located at the bottom end of the body; Among two adjacent first inlets of two adjacent first oil injection channels on at least one first semi-ring region, an area of the first inlet close to the first end is greater than an area of the first inlet close to the second end.
2. The oil spray ring according to claim 1, characterized in that: The second side surface includes two second semi-ring areas, the first outlet of the first oil injection channel is located on the second semi-ring area adjacent to the first semi-ring area where the first inlet is located, and among the adjacent two first outlets of the two adjacent first oil injection channels on at least one of the second semi-ring areas, the area of the first outlet close to the first end is larger than the area of the first outlet close to the second end.
3. The oil spray ring according to claim 2, characterized in that: An area of the first inlet of the first oil injection passage is greater than an area of the first outlet.
4. The oil spray ring according to claim 1, characterized in that: The main body also includes a second oil injection channel, which includes a cavity, a second inlet connected to the cavity is arranged on the first semi-ring area, a second outlet connected to the cavity is arranged on the second side, and the second inlet and the second outlet are connected at the junction of the first side and the second side.
5. The oil spray ring according to claim 4, characterized in that: The second oil injection passage is located between the first end of the first semi-annular region and the first inlet adjacent to the first end.
6. The oil spray ring according to claim 4, characterized in that: An arc-shaped flow channel is provided on at least one of the first half-ring regions, the arc-shaped flow channel extends along the circumference of the oil injection ring, the arc-shaped flow channel is connected to at least two of the first oil injection channels, and the first inlets of the at least two first oil injection channels are formed on the bottom wall of the arc-shaped flow channel; and / or The arc-shaped flow channel connects at least one of the cavities and at least one of the first oil injection channels, and the second inlet of the at least one of the cavities and the first inlet of the at least one of the first oil injection channels are formed on the bottom wall of the arc-shaped flow channel.
7. The oil injection ring according to any one of claims 1 to 6, characterized in that: A stator oil inlet port for communicating with a stator oil inlet passage of the stator core is provided at the first end.
8. A stator assembly, characterized in that: It comprises a stator core and the oil injection ring according to any one of claims 1 to 7, wherein the oil injection ring is provided at both ends of the stator core in the axial direction, and the stator core has a flow channel structure, and the flow channel structure is connected to the first oil injection channel.
9. The stator assembly according to claim 8, characterized in that The stator core includes a plurality of stator core segments stacked in an axial direction, the stator core segments having a first flow channel extending in a circumferential direction and a second flow channel extending in an axial direction, and two adjacent stator core segments are staggered in a circumferential direction by a preset angle so that at least one of the first flow channels of one of the stator core segments is connected to at least one of the second flow channels of another of the stator core segments, and the first oil injection channel of the oil injection ring is connected to the first flow channel or the second flow channel of the adjacent stator core segment.
10. The stator assembly according to claim 9, characterized in that From one end to the other end of the stator core along the axial direction, the stator core segments at odd positions form a first group of stator core segments, and the stator core segments at even positions form a second group of stator core segments. The second group of stator core segments are staggered by the preset angle in the circumferential direction relative to the first group of stator core segments to form a stator oil inlet channel extending in the axial direction, and the stator oil inlet channel is connected to the stator oil inlet port of the injection ring.
11. The stator assembly according to claim 9, characterized in that The stator core segment includes one or more stator punching sheets stacked in an axial direction, and the stator punching sheets include a first flow channel structure for forming the first flow channel and a second flow channel structure for forming the second flow channel.
12. The stator assembly according to claim 11, characterized in that The stator punching sheet includes a first sector ring area and a second sector ring area which are connected to each other. The first flow channel structure is formed on the first sector ring area, and the second flow channel structure is formed on the second sector ring area. The central angle of the first sector ring area is 180°-270°, and the central angle of the second sector ring area is 90°-180°.
13. A motor, characterized in that: It comprises a shell and a stator assembly according to any one of claims 8 to 12, the shell having a cavity and a shell cooling oil channel, the stator assembly is arranged in the cavity, the shell cooling oil channel has an oil inlet and at least two first oil outlets respectively located at two ends of the stator assembly along the axial direction, the first oil outlet is connected to the flow channel structure of the stator core through the stator oil inlet on the adjacent oil injection ring.
14. The motor according to claim 13, characterized in that The housing has two bearing chambers respectively located at two ends of the stator assembly, and the housing cooling oil channel has a second oil outlet communicated with the bearing chambers.
15. A vehicle, characterized in that: A motor comprising the motor described in claim 13 or 14.