Motor stator and motor

Abstract

The motor stator comprises a stator iron core, a flow guide ring and oil guide rings, the flow guide ring is located in the middle of the stator iron core in the axis direction, and the oil guide rings are arranged at the two ends of the stator iron core in the axis direction. According to the motor stator disclosed in the scheme, the stator core is provided with the first oil duct and the second oil duct, the first oil duct extends to the end winding from the communicating oil duct, the second oil duct extends to the oil outlet duct of the oil guide ring from the communicating oil duct, and the flow guide ring is provided with the communicating oil duct corresponding to the first oil duct and the second oil duct in position and communicating with the first oil duct and the second oil duct. Oil entering the first oil duct cools the winding firstly and then is sprayed to the end winding through the outlet of the first oil duct to cool the end winding, and oil entering the second oil duct is sprayed to the end winding through the oil outlet duct of the oil guide ring to cool the end winding. And the end winding is cooled through the first oil channel and the second oil channel, so that the winding and the end winding are effectively cooled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an electric machine stator and an electric machine. BACKGROUND

[0002] At present, with the development of the new energy automobile industry, the performance requirements for electric machines are becoming higher and higher. With the improvement of electric machines towards the goals of high efficiency and high power density, the temperature rise challenge of electric machines is gradually increasing. When the heat dissipation capacity of the electric machine is insufficient, the temperature rise of the winding and the end winding of the electric machine stator will be high, thereby causing problems such as damage of the insulation layer and demagnetization of the permanent magnet, and affecting the continuous working ability of the electric machine.

[0003] Therefore, how to effectively cool the winding and the end winding of the electric machine stator has become a technical problem to be solved by the person skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] The present application provides an electric machine stator to effectively cool the winding and the end winding of the electric machine stator. The present application also provides an electric machine.

[0005] In order to achieve the above-mentioned purpose, the present application provides an electric machine stator, comprising a stator core, a flow guide ring and an oil guide ring,

[0006] The flow guide ring is arranged in the middle of the axis direction of the stator core, and the oil guide ring is arranged at both ends of the axis direction of the stator core,

[0007] An annular oil cavity is formed between the outer wall of the flow guide ring and the machine shell of the electric machine, and both sides of the axis direction of the flow guide ring have a communication oil channel matched with the annular oil cavity,

[0008] The stator core on both sides of the flow guide ring has a first oil channel and a second oil channel, the first oil channel is arranged in the bottom of the stator slot of the stator core, the first oil channel extends from the communication oil channel to the end winding of the electric machine stator, the second oil channel is used for connecting the communication oil channel and the oil outlet oil channel of the oil guide ring, and the outlet of the oil outlet oil channel corresponds to the end winding.

[0009] Preferably, in the above-mentioned electric machine stator, the first oil channel and the second oil channel are distributed in the circumferential direction of the stator core

[0010] Preferably, in the above-mentioned electric machine stator, the second oil channel comprises a front oil channel and a rear oil channel, the front oil channel is arranged in the bottom of the stator slot, the rear oil channel is arranged in the yoke of the stator core, one end of the rear oil channel is communicated with the front oil channel, and the other end of the rear oil channel is communicated with the oil outlet oil channel.

[0011] Preferably, in the motor stator described above, the first oil channel and / or the front oil channel is at least one of a polygonal shape and an arc shape in a cross section perpendicular to the axis direction of the stator core.

[0012] Preferably, in the motor stator described above, the cross section of the first oil channel and / or the front oil channel is a zigzag shape.

[0013] Preferably, in the motor stator described above, the slot bottoms of two adjacent stator slots are respectively provided with the first oil channel and the front oil channel.

[0014] Preferably, in the motor stator described above, the slot bottom of the stator slot of the flow guide ring is provided with a near-slot oil channel in communication with the communication oil channel and the first oil channel.

[0015] Preferably, in the motor stator described above, the communication oil channel is provided along a radial direction of the flow guide ring,

[0016] Part of the communication oil channel corresponds in position to the first oil channel, and another part of the communication oil channel corresponds in position to the second oil channel.

[0017] Preferably, in the motor stator described above, the oil outlet channel is an inclined oil channel, which is inclined from the outlet of the second oil channel to the center direction of the stator core.

[0018] A motor has a motor stator, which is any one of the motor stators described above.

[0019] The motor stator provided by the embodiment of the present application comprises a stator core, a flow guide ring and an oil guide ring. The stator core is provided with a stator slot, and a winding is installed in the stator slot. The flow guide ring is located at a middle position in the axis direction of the stator core, and the oil guide ring is arranged at both ends of the stator core in the axis direction. The motor stator disclosed by the present scheme is provided with a first oil channel and a second oil channel. The first oil channel extends from a communication oil channel to an end winding, and the second oil channel extends from the communication oil channel to an oil outlet channel of the oil guide ring. The flow guide ring is provided with a communication oil channel corresponding in position to the first oil channel and the second oil channel and in communication with the first oil channel and the second oil channel. The oil liquid entering the first oil channel first cools the winding, and then is sprayed to the end winding through the outlet of the first oil channel to cool the end winding. The oil liquid entering the second oil channel is sprayed to the end winding through the oil outlet channel of the oil guide ring to cool the end winding. The motor stator disclosed by the present scheme not only can cool the winding, but also can cool the end winding. The end winding is cooled by two routes of oil liquid, i.e., the first oil channel and the second oil channel, so that the winding and the end winding are effectively cooled, and problems such as damage of an insulation layer and demagnetization of a permanent magnet caused by high temperature rise of the winding and the end winding of the motor stator are avoided.

[0020] This solution also discloses a motor, including a motor stator, which is positioned as the motor stator described in any of the above solutions. Since the motor stator has the above technical effects, the motor having the motor stator also has the same technical effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or prior art descriptions. Obviously, the drawings described below are only some examples or embodiments of the present application. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained based on the provided drawings, and the present application can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language context or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0022] Figure 1 It is a structural diagram of the stator of the motor of this application;

[0023] Figure 2 It is a three-dimensional diagram of the stator of the motor of the present application;

[0024] Figure 3 is a side view of the stator of the motor of the present application;

[0025] Figure 4 is a cross-sectional view of the stator of the motor of the present application;

[0026] Figure 5 is a cross-sectional view of the stator of the motor of the present application;

[0027] Figure 6 This is a schematic structural diagram of the guide ring of the motor stator of the present application;

[0028] Figure 7 is a schematic structural diagram of a stator core of a motor stator in some embodiments of the present application;

[0029] Figure 8 It is a schematic structural diagram of the stator core of the motor stator in other embodiments of the present application.

[0030] The accompanying drawings are as follows:

[0031] 1- stator core; 11- first oil channel; 12- second oil channel; 121- front oil channel; 122- rear oil channel; 2- guide ring; 21- connecting oil channel; 22- near-slot oil channel; 3- oil guide ring; 31- oil outlet channel; 4- annular oil cavity; 5- housing. DETAILED DESCRIPTION

[0032] The application will be described in further detail below with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not intended to limit the application. The embodiments described are only a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the application.

[0033] It should be noted that, for the convenience of description, only parts related to the application are shown in the drawings. The embodiments in the application and the features in the embodiments can be combined with each other in any manner without conflict, as long as the combined technical features are not contradictory. All feasible feature combinations are the technical content explicitly described herein. Any one of the multiple features included in the same sentence can be independently applied, and does not have to be applied together with other features.

[0034] As shown in the application and claims, unless the context clearly indicates otherwise, the words “one”, “an”, “a”, and / or “the” do not specify a singular form, but can also include a plural form. Generally, the terms “comprise” and “include” only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the phrase “comprising a” does not exclude the presence of additional identical elements in the process, method, product, or device comprising the element.

[0035] In the description of the embodiments of the application, “ / ” represents or unless otherwise specified, for example, A / B can represent A or B; “and / or” herein only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, in the description of the embodiments of the application, “multiple” means two or more than two.

[0036] Please refer to Figures 1-8 .

[0037] Some embodiments of the application disclose a motor stator, comprising a stator core 1, a flow guide ring 2, and an oil guide ring 3.

[0038] Optionally, the diameters of the stator core 1 and the oil guide ring 3 are the same as the inner diameter of the motor shell 5, and the width of the oil guide ring 3 is adjusted according to the actual size of the winding. The oil guide ring 3 is tightly attached to the stator core 1 in the axial direction of the stator core 1.

[0039] As Figure 2 , Figure 7 and Figure 8As shown, the stator core 1 has stator slots, windings are installed in the stator slots, a plurality of windings are installed in a single stator slot, for example, four, six or eight, etc., but not limited to the above number;

[0040] The flow guide ring 2 is located at the middle position of the axial direction of the stator core 1, the oil guide ring 3 is arranged at both ends of the axial direction of the stator core 1, the diameter of the flow guide ring 2 is smaller than the diameter of the stator core 1, so as to form an annular oil cavity 4 between the outer periphery of the flow guide ring 2 and the machine shell 5 of the motor, and the two sides of the flow guide ring 2 in the axial direction (or the two sides of the flow guide ring 2 and the stator core 1) have a communication oil channel 21;

[0041] The stator core 1 has a first oil channel 11 and a second oil channel 12, the first oil channel 11 is arranged at the bottom of the stator slot of the stator core 1, the first oil channel 11 extends from the communication oil channel 21 to the end winding, the second oil channel 12 extends from the communication oil channel 21 to the oil outlet channel 31 of the oil guide ring 3, the outlet of the oil outlet channel 31 corresponds to the end winding, and the flow guide ring 2 has a communication oil channel 21 corresponding to the positions of the first oil channel 11 and the second oil channel 12 and in communication.

[0042] The stator core 1 is composed of a plurality of silicon steel sheets, each silicon steel sheet has a core slot, and after the plurality of silicon steel sheets are stacked, the core slots of the plurality of silicon steel sheets are in communication to form stator slots, and windings are installed in the stator slots;

[0043] The flow guide ring 2 is located at the middle position of the axial direction of the stator core 1, the flow guide ring 2 is also composed of a plurality of silicon steel sheets, the silicon steel sheets of the flow guide ring 2 also have core slots, and after the plurality of silicon steel sheets are stacked, the core slots of the plurality of silicon steel sheets are in communication to form stator slots, and windings are installed in the stator slots.

[0044] As shown in Figure 1 , Figure 4 and Figure 5 , the diameter of the silicon steel sheet of the flow guide ring 2 is smaller than the diameter of the silicon steel sheet of the stator core 1, after the flow guide ring 2 and the stator core 1 are stacked, the circumferential height of the flow guide ring 2 is lower than the circumferential height of the stator core 1, an annular oil cavity 4 is formed between the outer periphery of the flow guide ring 2 and the machine shell 5 of the motor, and the machine shell 5 of the motor has an oil injection port in communication with the annular oil cavity 4. Optionally, the diameter of the oil injection port is equal to the width of the annular oil cavity 4.

[0045] The flow guide ring 2 is located at the middle position of the axial direction of the stator core 1, the oil entering the annular oil cavity 4 needs to pass through the flow guide ring 2 to supply oil to the stator core 1 located on both sides of the flow guide ring 2, so as to ensure that the oil entering the stator core 1 located on both sides of the flow guide ring 2 is more balanced. Specifically, the two sides of the flow guide ring 2 in the axial direction have a communication oil channel 21, in order to facilitate subsequent description, the left side of the flow guide ring 2 in the axial direction is taken as an example. Figure 1For reference, the communication oil channel 21 on the left side of the flow guide ring 2 is named as the first communication oil channel 21, the communication oil channel 21 on the right side of the flow guide ring 2 is named as the second communication oil channel 21, the stator core 1 on the left side of the flow guide ring 2 is named as the first stator core 1, and the stator core 1 on the right side of the flow guide ring 2 is named as the second stator core 1. The oil enters the annular oil cavity 4 through the oil inlet, fills the annular oil cavity 4, and is supplied into the first communication oil channel 21 and the second communication oil channel 21, respectively. The oil in the first communication oil channel 21 is supplied into the first oil channel 11 and the second oil channel 12 of the first stator core 1, the oil in the second oil channel 12 is supplied into the oil outlet channel 31 of the oil guide ring 3, the oil in the second communication oil channel 21 is supplied into the first oil channel 11 and the second oil channel 12 of the second stator core 1, and the oil in the second oil channel 12 is supplied into the oil outlet channel 31 of the oil guide ring 3.

[0046] The first oil channel 11 penetrates the stator core 1, and the oil in the first oil channel 11 is directly sprayed to the inner side of the end portion winding after completing heat exchange with the winding in the stator slot.

[0047] The oil entering the first oil channel 11 first cools the winding, and then is sprayed to the end portion winding through the outlet of the first oil channel 11 to cool the end portion winding.

[0048] The oil entering the second oil channel 12 is sprayed to the end portion winding through the oil outlet channel 31 of the oil guide ring 3 to cool the end portion winding.

[0049] The outlets of the first oil channel 11 and the oil outlet channel 31 are located at different positions in the radial direction of the stator core, so that the oil covers the inner side and the outer side of the end portion winding in the radial direction, and the cooling effect of the end portion winding is improved.

[0050] The oil cooled for the end portion winding is finally discharged through the oil discharge port of the machine shell 5.

[0051] The motor stator disclosed in the scheme not only can cool the winding, but also can cool the end portion winding, and the end portion winding is cooled by two-way oil of the first oil channel 11 and the second oil channel 12, so that the winding and the end portion winding are effectively cooled, and problems such as damage of the insulation layer and demagnetization of the permanent magnet caused by high temperature rise of the winding and the end portion winding of the motor stator are avoided.

[0052] The first oil channel 11 is arranged at the bottom of the stator slot of the stator core 1, the first oil channel 11 communicates with the stator slot, the oil in the first oil channel 11 can directly contact the winding in the stator slot, the heat of the winding can be directly taken away by the oil, the heat conduction path is effectively shortened, the thermal resistance in the heat conduction path is reduced, and the cooling effect is improved.

[0053] In some embodiments, the first oil channel 11 and the second oil channel 12 correspond to two adjacent stator slots respectively, wherein the bottom of one of the stator slots is provided with the first oil channel 11, and the yoke portion of the stator core 1 corresponding to the position of the other stator slot is provided with the second oil channel 12.

[0054] In some embodiments, the bottom of the stator slot of the stator core 1 is provided with the first oil channel 11, and the yoke portion of the stator core 1 corresponding to the position of the stator slot provided with the first oil channel 11 is provided with the second oil channel 12. In this embodiment, the first oil channel 11 and the second oil channel 12 are provided for one stator slot.

[0055] In the above two embodiments, the number of the first oil channels 11 is equal to the number of the second oil channels 12.

[0056] In other embodiments, the number of the first oil channels 11 is greater than the number of the second oil channels 12. In the embodiments in which the first oil channel 11 and the second oil channel 12 correspond to different positions of the stator slot respectively, there are at least two first oil channels 11 between two adjacent second oil channels 12.

[0057] In some embodiments, the first oil channel 11 and the second oil channel 12 are distributed in a staggered manner in the circumferential direction of the stator core 1. Optionally, the first oil channel 11 and the second oil channel 12 are both provided along the axial direction of the stator core 1.

[0058] The staggered distribution of the first oil channel 11 and the second oil channel 12 means that the projections of the first oil channel 11 and the second oil channel 12 in the direction perpendicular to the axial direction of the stator core 1 do not overlap, and the first oil channel 11 and the second oil channel 12 correspond to different stator slots respectively.

[0059] The second oil channel 12 communicates with the oil outlet channel 31, and the second oil channel 12 corresponds to the position of the oil outlet channel 31. The second oil channel 12 and the first oil channel 11 are arranged in a staggered manner, and the oil outlet channel 31 and the first oil channel 11 are also arranged in a staggered manner.

[0060] In the embodiments in which the first oil channel 11 and the second oil channel 12 correspond to two adjacent stator slots respectively, the outlet of the oil outlet channel 31 and the outlet of the first oil channel 11 are distributed in a staggered manner in the circumferential direction of the stator core 1, so as to ensure that the oil can contact each position in the circumferential direction of the end portion winding, adopt a wrapping type end portion spraying scheme, make the oil uniformly cover the inner side and the outer side of the end portion winding, and realize multi-directional and multi-point spraying, reduce the overall temperature of the end portion winding, and improve the uniformity of the temperature distribution of the end portion winding, and reduce the risk of local hot spots due to uneven temperature distribution.

[0061] The motor stator disclosed in the scheme can realize heat dissipation of the winding through cooperation of the first oil channel 11 and the second oil channel 12, can dissipate heat at different positions in the circumferential and radial directions of the end winding, greatly reduces the temperature of the heat core component winding, can achieve better cooling effect, and is helpful to improve the overall performance of the motor.

[0062] In some embodiments, the second oil channel 12 can be directly arranged in the yoke of the stator core 1.

[0063] In some embodiments, the second oil channel 12 includes a front oil channel 121 and a rear oil channel 122, the front oil channel 121 is arranged in the bottom of the stator slot, and the rear oil channel 122 is arranged in the yoke of the stator core 1, that is, in this embodiment, part of the second oil channel 12 is arranged in the bottom of the stator slot, and the other part is arranged in the yoke of the stator core 1, one end of the front oil channel 121 is communicated with the communication oil channel 21, the other end of the front oil channel 121 is communicated with one end of the rear oil channel 122, and the other end of the rear oil channel 122 is communicated with the oil outlet channel 31.

[0064] The front oil channel 121 is parallel to the first oil channel 11, the length of the front oil channel 121 is less than the length of the first oil channel 11, the rear oil channel 122 is an inclined oil channel, the inclined oil channel extends from the front oil channel 121 to the oil outlet channel 31, and the length of the projection of the second oil channel 12 in the direction perpendicular to the axis of the stator core 1 is equal to the length of the projection of the first oil channel 11 in the direction perpendicular to the axis of the stator core 1.

[0065] In this embodiment, the front oil channel 121 is arranged in the bottom of the stator slot, the oil entering the front oil channel 121 can cool the winding, the oil entering the rear oil channel 122 can cool the stator core 1 and indirectly cool the winding, and the oil passing through the rear oil channel 122 is sprayed out through the outlet of the oil outlet channel 31 to cool the end winding.

[0066] Optionally, the bottom of each stator slot is provided with an oil channel (the first oil channel 11 or the front oil channel 121) for cooling the winding, so as to effectively cool the winding at the circumferential position of the stator core 1.

[0067] The bottom of each stator slot is provided with an oil channel (the first oil channel 11 or the front oil channel 121), and the width of the slot opening of the communication position of the oil channel (the first oil channel 11 or the front oil channel 121) and the stator slot is less than the width of the bottom of the stator slot, so as to prevent the winding from entering the oil channel and play a limiting role on the winding. It should be noted here that the width of the slot opening of the oil channel (the first oil channel 11 or the front oil channel 121) and the width of the bottom of the stator slot are the dimensions of the slot opening and the bottom along the circumferential direction of the stator core 1.

[0068] In some embodiments, the cross-section of the oil passage (first oil passage 11 or front oil passage 121) along a direction perpendicular to the axis of the stator core 1 can be at least one of a polygon and an arc. In embodiments where the cross-section of the oil passage is polygonal, the cross-section can be rectangular, rhombus, trapezoidal, etc.

[0069] like Figure 7 The embodiment shown is one in which the cross-section of the oil passage is trapezoidal. The width of the slot where the oil passage (the first oil passage 11 or the front oil passage 121) communicates with the stator slot is smaller than the width of the side of the oil passage (the first oil passage 11 or the front oil passage 121) away from the bottom of the stator slot, so as to increase the volume of the oil passage.

[0070] In some embodiments, such as Figure 8 As shown, the cross section of the oil channel (the first oil channel 11 or the front oil channel 121 ) along the direction perpendicular to the axis of the stator core 1 can be serrated to separate a single oil channel into multiple small oil channels, so as to increase the heat exchange area of ​​the oil channel (the first oil channel 11 or the front oil channel 121 ).

[0071] Optionally, the serrations of the oil passage may be triangular serrations, trapezoidal serrations, rectangular serrations, arcuate serrations, or serrations of other shapes.

[0072] In this solution, the width of guide ring 2 along the axis of stator core 1 is smaller than the width of stator core 1 itself, and the length of the portion where the windings fit into guide ring 2 is also relatively short. After oil enters the annular oil chamber from the oil inlet and then flows into the connecting oil passage, the cooling energy of the oil is transferred through guide ring 2 to the windings that fit into it, thereby cooling the windings.

[0073] In order to further improve the reliability of cooling the windings that cooperate with the guide ring 2, this solution opens a near-groove oil channel 22 at the bottom of the stator slot of the guide ring 2, which is connected to both the connecting oil channel 21 and the first oil channel 11. The near-groove oil channel 22 corresponds to and is connected to the first oil channel 11, and the near-groove oil channel 22 runs through the guide ring 2.

[0074] The oil enters the first oil passage 11 and the near-groove oil passage 22 through the connecting oil passage 21 . The oil in the near-groove oil passage 22 can further dissipate heat for the winding that cooperates with the guide ring 2 .

[0075] In some embodiments, the connecting oil passage 21 is opened along the radial direction of the guide ring 2, and the connecting oil passage 21 corresponds to the position of the stator slot of the guide ring 2, that is, the connecting oil passage 21 corresponds one-to-one to the stator slot of the guide ring 2, so as to ensure that oil is supplied to each first oil passage 11 and the near-groove oil passage 22.

[0076] The above-mentioned method of opening the communicating oil passage 21 has the shortest opening length of the communicating oil passage 21 and is easy to open.

[0077] Due to the first oil channel 11 and the second oil channel 12 are staggered in the circumferential direction of the stator core 1, part of the communication oil channels 21 on the same side of the flow guide ring 2 is communicated with the first oil channel 11, and the other part is communicated with the second oil channel 12. The number of the communication oil channels 21 communicated with the first oil channel 11 is equal to the number of the communication oil channels 21 communicated with the second oil channel 12.

[0078] The oil outlet channel 31 is an inclined oil channel, the oil outlet channel 31 is inclined from the second oil channel 12 to the center of the stator core 1, and the communication position of the second oil channel 12 and the oil outlet channel 31 is close to the shell 5, as shown in the figure, the outlet of the oil outlet channel 31 is close to the center of the stator core 1 relative to the inlet of the oil outlet channel 31. Figure 5

[0079] The end winding rear side outside is guided by the oil outlet channel 31 to the spray falling point, the position of the falling point is determined by adjusting the flow guide angle of the oil outlet channel 31, and optionally, the oil outlet channel 31 guides the oil to the center position of the end winding.

[0080] The number ratio of the oil outlet channel 31 and the first oil channel 11 is selected according to the cooling demand, and the oil outlet channel 31 can be provided with multiple layers in the radial direction of the oil guide ring 3 according to the cooling demand.

[0081] The motor stator disclosed in the scheme can be combined with the rotor oil throwing to enhance the cooling effect of the end winding.

[0082] The scheme takes into account the influence of oil channel arrangement on the process to some extent, and proposes a systematic oil path scheme, fully considering the slot winding cooling and end winding cooling, and the cooling scheme is systematic and comprehensive.

[0083] The oil ejection direction of the oil outlet channel 31 is towards the center of the stator core 1, so that the oil is more concentrated in the end winding, and the cooling effect of the end winding is improved.

[0084] The scheme also discloses a motor, which comprises the motor stator as described in any one of the above schemes.

[0085] Since the motor stator has the above technical effects, the motor with the motor stator also has the same technical effects, which will not be described here. The above description is only the preferred embodiment of the present application and the explanation of the technical principles applied, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. The scope of the application involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above application concept. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the present application (but not limited to) having similar functions.​

Claims

1. An electric machine stator, characterized in that, The stator core (1), the flow guide ring (2) and the oil guide ring (3) are arranged in sequence along the axial direction of the stator core (1), The flow guide ring (2) is arranged in the middle of the axial direction of the stator core (1), and the oil guide ring (3) is arranged at both ends of the axial direction of the stator core (1), An annular oil cavity (4) is formed between the outer wall of the flow guide ring (2) and the motor shell (5), and both sides of the axial direction of the flow guide ring (2) have a communication oil channel (21) matched with the annular oil cavity (4), Both sides of the stator core (1) located on both sides of the flow guide ring (2) have a first oil channel (11) and a second oil channel (12), the first oil channel (11) is arranged in the bottom of the stator slot of the stator core (1), the first oil channel (11) extends from the communication oil channel (21) to the end winding of the motor stator, and the second oil channel (12) is used for connecting the communication oil channel (21) and an oil outlet oil channel (31) of the oil guide ring (3), and the outlet of the oil outlet oil channel (31) corresponds to the end winding.

2. The motor stator of claim 1, wherein, The first oil channel (11) and the second oil channel (12) are distributed in a circumferential direction of the stator core (1).

3. The motor stator of claim 2, wherein, The second oil channel (12) includes a front oil channel (121) and a rear oil channel (122), the front oil channel (121) is arranged in the bottom of the stator slot, and the rear oil channel (122) is arranged in the yoke of the stator core (1), one end of the rear oil channel (122) is communicated with the front oil channel (121), and the other end of the rear oil channel (122) is communicated with the oil outlet oil channel (31).

4. The motor stator of claim 3, wherein, The first oil channel (11) and / or the front oil channel (121) is at least one of a polygon and an arc in a cross section perpendicular to the axial direction of the stator core (1).

5. The motor stator of claim 3, wherein, The cross section of the first oil channel (11) and / or the front oil channel (121) is a sawtooth shape.

6. The motor stator of claim 3, wherein, The bottom of each of two adjacent stator slots is provided with the first oil channel (11) and the front oil channel (121) respectively.

7. The motor stator of any one of claims 1-6, wherein, The bottom of the stator slot of the flow guide ring (2) has a near-slot oil channel (22) communicated with the communication oil channel (21) and the first oil channel (11).

8. The motor stator of claim 7, wherein, The communication oil channel (21) is arranged along the radial direction of the flow guide ring (2), Part of the communication oil channel (21) corresponds to the position of the first oil channel (11), and the other part of the communication oil channel (21) corresponds to the position of the second oil channel (12).

9. The motor stator of claim 1, wherein, The oil outlet oil channel (31) is an inclined oil channel, and the oil outlet oil channel (31) is inclined from the outlet of the second oil channel (12) to the center of the stator core (1).

10. An electric machine characterized by The motor stator has the motor stator according to any one of claims 1-9.

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