Rotating shaft and rotor assembly

Abstract

The utility model discloses a pivot and rotor assembly. The pivot comprises a shaft body. The shaft body has a first end, a second end opposite to the first end, an outer peripheral wall, an inlet hole, a connecting flow channel and a flow guide groove. The outer peripheral wall is located between the first end and the second end. The connecting flow channel is located inside the shaft body and has a first outlet. The flow guide groove is located on the outer peripheral wall and extends along the axial direction of the shaft body. The flow guide groove has a second outlet and a third outlet. The first outlet is in communication with the flow guide groove, the second outlet is located on the part of the shaft body close to the first end, the third outlet is located on the part of the shaft body close to the second end, at least a part of the connecting flow channel is arranged radially and obliquely to the shaft body, and the inlet hole is in communication with the flow guide groove through the connecting flow channel. The pivot can effectively solve the problem of oil stirring loss of the rotor assembly.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and in particular relates to a rotating shaft and rotor assembly. Background Technology

[0002] Oil-cooled motors are motors that use cooling lubricating oil to directly contact the main heat-generating components for cooling, usually meaning that the oil directly contacts the windings.

[0003] In existing technologies, oil-cooled motors generally employ either a straight-through oil slinger cooling scheme or a sleeve-type oil slinger cooling scheme. The straight-through oil slinger cooling scheme has a relatively simple structure, but it faces challenges in designing a balanced flow distribution; the sleeve-type oil slinger cooling scheme is relatively simple in terms of balanced flow distribution design, but it suffers from severe oil churning losses. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] A rotating shaft, comprising: Shaft body, the shaft body having: A first end and a second end opposite to the first end; An outer peripheral wall, the outer peripheral wall being located between the first end and the second end; Inlet hole; A connecting flow channel, the connecting flow channel being located inside the shaft body and having a first outlet; and A flow guide channel is located on the outer peripheral wall and extends axially along the shaft body, the flow guide channel having a second outlet and a third outlet; The first outlet is connected to the guide groove, the second outlet is located on the portion of the shaft body near the first end, the third outlet is located on the portion of the shaft body near the second end, at least a portion of the connecting flow channel is radially inclined to the shaft body, and the inlet hole is connected to the guide groove through the connecting flow channel.

[0006] The rotating shaft of this invention includes a shaft body. Cooling medium enters the connecting channel through an inlet, flows along the connecting channel into the guide groove, and then flows out of the guide groove from the second and third openings. Because the cooling medium flows in the connecting channel and the guide groove, it effectively reduces the disordered flow of oil and effectively solves the problem of oil churning loss in the rotor assembly.

[0007] In some embodiments, the flow channel is used to circulate cooling medium, and the position of the first outlet is such that the flow rate of the cooling medium flowing through the second outlet is the same as the flow rate of the cooling medium flowing through the third outlet.

[0008] By setting the flow rate of the cooling medium at the second outlet to be the same as that at the third outlet, the problem of the initial velocity affecting the flow distribution of the oil flowing to one side can be effectively solved.

[0009] In some embodiments, along the axial direction of the shaft body, the distance between the center point of the first outlet and the center point of the second outlet is equal to the distance between the center point of the first outlet and the center point of the third outlet.

[0010] By setting the distance between the center points of the first and second outlets to be equal to the distance between the center points of the first and third outlets, it is convenient to ensure that the flow rate of the cooling medium at the second outlet is consistent with that at the third outlet.

[0011] In some embodiments, the portion of the shaft body near the first end has a first manifold, the portion of the shaft body near the second end has a second manifold, the first manifold is connected to the second outlet, and the second manifold is connected to the third outlet.

[0012] By setting up a first and a second manifold, the oil flows through the guide channel and first enters the first or second manifold for collection, thereby improving the utilization rate of the cooling medium.

[0013] In some embodiments, the guide channel includes a first channel, the first channel includes a first sub-channel and a second sub-channel, the first sub-channel has a second outlet, the second sub-channel has a third outlet, the shaft body has a third confluence channel, the third confluence channel is located between the first sub-channel and the second sub-channel, and the first outlet, the first sub-channel and the second sub-channel are all connected to the third confluence channel.

[0014] By setting up a third manifold, the cooling medium flows through the connecting channel and first enters the third manifold, and then flows from the third manifold into the first sub-slot and the second sub-slot, realizing the secondary distribution of the cooling medium and improving the utilization rate of the cooling medium.

[0015] In some embodiments, the flow guide groove includes a second groove, the second groove includes a third sub-groove and a fourth sub-groove, the third sub-groove has a second outlet, the fourth sub-groove has a third outlet, the connecting flow channel is in communication with both the third sub-groove and the fourth sub-groove, and the third sub-groove and the fourth sub-groove are spaced apart along the circumferential direction of the shaft body.

[0016] By setting the third and fourth sub-slots at intervals along the circumference of the shaft body, a larger area of ​​the shaft body can be covered with as few guide slots as possible.

[0017] In some embodiments, the guide channel includes a third channel having a second outlet and a third outlet, the third channel extending from a portion of the shaft body near the first end to a portion of the shaft body near the second end.

[0018] By setting up a third tank, the cooling medium flows from the connecting channel to the third tank and can then flow to the second outlet and the third outlet respectively through the third tank. The structure is simple and easy to process.

[0019] In some embodiments, the connecting channel includes a first channel, which includes a direct channel and an oblique channel. The direct channel extends radially along the shaft body, and the oblique channel is inclined to the direct channel. The direct channel communicates with the oblique channel and is connected to the inlet. The direct channel has a first outlet.

[0020] By configuring the connecting flow channel to include a direct flow channel and an oblique flow channel, and by setting the oblique flow channel and the direct flow channel at an angle, the direction of the cooling medium entering the guide groove from the connecting flow channel can be adjusted.

[0021] In some embodiments, the connecting channel includes a second channel having a first outlet, and an end of the shaft body defining the second channel opposite to the first outlet is connected to the shaft body defining the inlet.

[0022] By setting a second flow channel, which is directly connected to the inlet hole and the guide groove respectively, the structure is simple and easy to process.

[0023] A rotor assembly, comprising: The aforementioned shaft; A first cover plate is sleeved on and connected to the shaft body, and the first cover plate has a first hole that communicates with the second outlet. A second cover plate, sleeved on and connected to the shaft body, the second cover plate having a second hole communicating with the third outlet; and The rotor is sleeved on and connected to the shaft body, and the rotor is located between the first cover plate and the second cover plate. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1This is a cross-sectional view of a rotor assembly provided in one embodiment of the present invention. Figure 1 ; Figure 2 This is a cross-sectional view of a rotor assembly provided in one embodiment of the present invention. Figure 2 ; Figure 3 This is an exploded view of a rotor assembly provided in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a rotating shaft provided in one embodiment of the present invention; Figure 5 This is a schematic diagram of a fluid domain provided in one embodiment of the present invention; Figure 6 This is a cross-sectional view of a rotor assembly provided in another embodiment of the present invention. Figure 1 ; Figure 7 This is a cross-sectional view of a rotor assembly provided in another embodiment of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the structure of a rotating shaft provided in another embodiment of the present invention; Figure 9 This is a schematic diagram of the fluid domain provided in another embodiment of the present invention; Figure 10 This is a cross-sectional view of the rotor assembly provided in another embodiment of the present invention. Figure 1 ; Figure 11 This is a cross-sectional view of the rotor assembly provided in another embodiment of the present invention. Figure 1 ; Figure 12 This is a schematic diagram of the fluid domain provided in another embodiment of the present invention; Figure 13 This is a schematic diagram of the structure of the rotating shaft provided in another embodiment of this utility model.

[0026] Figure label: 1. Shaft body; 11. Inlet hole; 12. Connecting flow channel; 121. First outlet; 122. First flow channel; 1221. Inclined flow channel; 1222. Straight flow channel; 123. Second flow channel; 13. Guide groove; 131. Second outlet; 132. Third outlet; 133. First groove; 1331. First sub-groove; 1332. Second sub-groove; 134. Second groove; 1341. Third sub-groove; 1342. Fourth sub-groove; 135. Third groove; 14. First end; 15. Second end; 16. First confluence groove; 17. Second confluence groove; 18. Third confluence groove; 19. Outer peripheral wall; 2. First cover plate; 21. First hole; 3. Second cover plate; 31. Second hole; 4. Rotor; 5. Inlet pipe; 6. Locking ring; 10. First sub-channel; 20. Second sub-channel; 30. Third sub-channel; 40. Fourth sub-channel; 50. Third channel; 60. First manifold; 70. Second manifold; 80. Third manifold. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0028] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0029] A rotating shaft includes a shaft body. The shaft body has a first end and a second end opposite to the first end, an outer peripheral wall, an inlet, a connecting channel, and a guide groove. The outer peripheral wall is located between the first end and the second end. The connecting channel is located inside the shaft body and has a first outlet. The guide groove is located on the outer peripheral wall and extends axially along the shaft body. The guide groove has a second outlet and a third outlet. The first outlet communicates with the guide groove, the second outlet is located in the portion of the shaft body near the first end, and the third outlet is located in the portion of the shaft body near the second end. At least a portion of the connecting channel is radially inclined to the shaft body, and the inlet communicates with the guide groove through the connecting channel.

[0030] The rotating shaft of this invention includes a shaft body. Cooling medium enters the connecting channel through an inlet, flows along the connecting channel into the guide groove, and then flows out of the guide groove from the second and third openings. Because the cooling medium flows in the connecting channel and the guide groove, it effectively reduces the disordered flow of oil and effectively solves the problem of oil churning loss in the rotor assembly.

[0031] Optionally, the cooling medium is oil.

[0032] like Figure 1 and Figure 2 As shown, in some embodiments, the rotor assembly includes a shaft, a first cover plate 2, a second cover plate 3, and a rotor 4. The shaft includes a shaft body 1. The first cover plate 2 is sleeved on and connected to the shaft body 1. The second cover plate 3 is sleeved on and connected to the shaft body 1. The rotor 4 is located between the first cover plate 2 and the second cover plate 3. The rotor 4 is sleeved on and connected to the shaft body 1.

[0033] Specifically, the first cover plate 2 is transitionally fitted to the shaft body 1. The second cover plate 3 is transitionally fitted to the shaft body 1. The rotor 4 is transitionally fitted to the shaft body 1.

[0034] like Figure 3 As shown, specifically, along the axial direction of rotor 4, the cross-sectional shape of rotor 4 is annular.

[0035] Specifically, along the axial direction of the first cover plate 2, the cross-sectional shape of the first cover plate 2 is annular. Along the axial direction of the second cover plate 3, the cross-sectional shape of the second cover plate 3 is annular.

[0036] like Figure 1 and Figure 2 As shown, in some embodiments, the rotor assembly further includes a locking ring 6. The locking ring 6 is sleeved on the shaft body 1. The locking ring 6 is transitionally fitted with the shaft body 1. The locking ring 6 abuts against the second cover plate 3.

[0037] In some embodiments, the rotor assembly further includes an inlet pipe 5. A portion of the inlet pipe 5 is located in the inlet bore 11. Oil enters the inlet bore 11 through the inlet pipe 5.

[0038] like Figure 1 and Figure 5As shown, the shaft body 1 has a first end 14, a second end 15 opposite to the first end 14, and an outer peripheral wall 19. The outer peripheral wall 19 is located between the first end 15 and the second end 15. The shaft body 1 has an inlet 11, a guide groove 13, and a connecting channel 12. The connecting channel 12 is located inside the shaft body 1. The connecting channel 12 has a first outlet 121. The guide groove 13 is located on the outer peripheral wall 19 and extends axially along the shaft body 1. The first outlet 121 communicates with the guide groove 13. The guide groove 13 has a second outlet 131 and a third outlet 132. The second outlet 131 is located in the portion of the shaft body 1 near the first end 14. The third outlet 132 is located in the portion of the shaft body 1 near the second end 15. At least a portion of the connecting channel 12 is arranged radially inclined to the shaft body 1. The inlet 11 communicates with the guide groove 13 through the connecting channel 12.

[0039] Oil enters the connecting channel 12 through the inlet 11, flows into the guide groove 13 along the connecting channel 12, and then flows out of the guide groove 13 from the second outlet 131 and the third outlet 132. Because the oil flows in the connecting channel 12 and the guide groove 13, the disordered flow of the oil can be effectively reduced, and the problem of oil churning loss in the rotor assembly can be effectively solved.

[0040] In some embodiments, the flow channel 13 is used for the flow of cooling medium. The position of the first outlet 121 in the flow channel 13 is such that the flow rate of the cooling medium flowing through the second outlet 131 is the same as the flow rate of the cooling medium flowing through the third outlet 132. By making the flow rate of the cooling medium flowing through the second outlet 131 the same as the flow rate of the cooling medium flowing through the third outlet 132, the problem of the initial velocity affecting the flow distribution between the front and rear outlets when the oil flows to one side can be effectively solved.

[0041] In some embodiments, along the axial direction of the shaft body 1, the distance between the center point of the first outlet 121 and the center point of the second outlet 131 is equal to the distance between the center point of the first outlet 121 and the center point of the third outlet 132. By setting the distance between the center points of the first outlet 121 and the second outlet 131 to be equal to the distance between the center points of the first outlet 121 and the third outlet 132, it is convenient to ensure that the flow rate of the cooling medium flowing through the second outlet 131 is consistent with the flow rate of the cooling medium flowing through the third outlet 132.

[0042] Of course, in other embodiments, the position of the first outlet 121 can be adjusted as needed so that the ratio of the distance between the center point of the first outlet 121 and the center point of the second outlet 131 to the distance between the center point of the first outlet 121 and the center point of the third outlet 132 is a first preset value, so that the ratio of the flow rate of the cooling medium flowing through the second outlet 131 to the flow rate of the cooling medium flowing through the third outlet 132 is a second preset value.

[0043] like Figure 2 and Figure 5 As shown, in some embodiments, the first cover plate 2 has a first hole 21. The second cover plate 3 has a second hole 31. The second outlet 131 communicates with the first hole 21. The third outlet 132 communicates with the second hole 31. Part of the oil flows from the guide channel 13 into the first hole 21 through the second outlet 131, and is then thrown out from the first hole 21. Part of the oil flows from the guide channel 13 into the second hole 31 through the third outlet 132, and is then thrown out from the second hole 31.

[0044] Specifically, the first cover plate 2 has four first holes 21. The second cover plate 3 has four second holes 31.

[0045] like Figure 5 As shown, in some embodiments, the first hole 21 is a circular hole. Of course, in other embodiments, the first hole 21 can also be an elliptical hole.

[0046] In some embodiments, the second hole 31 is a circular hole. Of course, in other embodiments, the second hole 31 may also be an elliptical hole.

[0047] like Figures 1-5 As shown, in some embodiments, the portion of the shaft body 1 near the first end 14 has a first manifold 16. The portion of the shaft body 1 near the second end 15 has a second manifold 17. The first manifold 16 communicates with the second outlet 131. The second manifold 17 communicates with the third outlet 132. By providing the first manifold 16 and the second manifold 17, some oil flows through the guide channel 13 and first enters the first manifold 16 for collection before being ejected from the first hole 21; some oil flows through the guide channel 13 and first enters the second manifold 17 for collection before being ejected from the second hole 31, thereby improving the utilization rate of the oil.

[0048] Specifically, the portion of the shaft body 1 that defines the first manifold 16 forms a first manifold cavity 60 with the first cover plate 2. The portion of the shaft body 1 that defines the second manifold 17 forms a second manifold cavity 70 with the second cover plate 3.

[0049] like Figure 2 and Figure 5As shown, in some embodiments, the guide channel 13 includes a first channel 133. The first channel 133 includes a first sub-channel 1331 and a second sub-channel 1332. The first sub-channel 1331 has a second outlet 131. The second sub-channel 1332 has a third outlet 132. The shaft body 1 has a third confluence channel 18. The third confluence channel 18 is located between the first sub-channel 1331 and the second sub-channel 1332. The first outlet 121, the first sub-channel 1331, and the second sub-channel 1332 are all connected to the third confluence channel 18. By setting the third confluence channel 18, the cooling medium flows through the connecting channel 12 and first enters the third confluence channel 18, and then flows from the third confluence channel 18 into the first sub-channel 1331 and the second sub-channel 1332, realizing the secondary distribution of the cooling medium and improving the utilization rate of the oil.

[0050] Specifically, the first slot 133 has four slots. The first slot 133 includes a first sub-slot 1331 and a first and a second sub-slot 1332.

[0051] Specifically, the portion of the shaft body 1 defining the first sub-slot 1331, the first cover plate 2, and the rotor 4 form the first sub-flow channel 10. The portion of the shaft body 1 defining the second sub-slot 1332, the second cover plate 3, and the rotor 4 form the second sub-flow channel 20. The portion of the shaft body 1 defining the third confluence slot 18 and the rotor 4 form the third confluence cavity.

[0052] In some embodiments, the connecting flow channel 12 includes a second flow channel 123. The second flow channel 123 has a first outlet 121. One end of the shaft body 1 defining the second flow channel 123, facing away from the first outlet 121, is connected to the shaft body 1 defining the inlet hole 11. By providing the second flow channel 123, the second flow channel 123 is directly connected to the inlet hole 11 and the guide groove 13 respectively, resulting in a simple structure and convenient processing.

[0053] Specifically, there are four second flow channels 123.

[0054] like Figures 6-9 As shown, in some embodiments, the flow guide trough 13 includes a second trough 134. The second trough 134 includes a third sub-trough 1341 and a fourth sub-trough 1342. The third sub-trough 1341 has a second outlet 131, and the fourth sub-trough 1342 has a third outlet 132. The connecting channel 12 communicates with both the third sub-trough 1341 and the fourth sub-trough 1342. The third sub-trough 1341 and the fourth sub-trough 1342 are spaced apart along the circumference of the shaft body 1. By setting the third sub-trough 1341 and the fourth sub-trough 1342 to be spaced apart along the circumference of the shaft body 1, a larger area of ​​the shaft body 1 is covered while minimizing the number of flow guide troughs 13.

[0055] Specifically, there are four second slots 134. In the two first slots 133, each second slot 134 includes a third sub-slot 1341. In the other two second slots 134, each second slot 134 includes a fourth sub-slot 1342.

[0056] Specifically, there are four second flow channels 123. Two of the second flow channels 123 are connected to the third sub-slot 1341. The other two second flow channels 123 are connected to the fourth sub-slot 1342.

[0057] Specifically, the portion of the shaft body 1 defining the third sub-slot 1341, the first cover plate 2, and the rotor 4 form the third sub-flow channel 30. The portion of the fourth sub-slot 1342, the second cover plate 3, and the rotor 4 form the fourth sub-flow channel 40.

[0058] like Figures 10-13 As shown, in some embodiments, the guide channel 13 includes a third channel 135, which has a second outlet 131 and a third outlet 132. The third channel 135 extends from the portion of the shaft body 1 near the first end 14 to the portion of the shaft body 1 near the second end 15. By providing the third channel 135, the cooling medium flows from the connecting channel 12 to the third channel 135, and can then flow through the third channel 135 to the second outlet 131 and the third outlet 132 respectively. The structure is simple and easy to process.

[0059] Specifically, the portion of the shaft body 1 that defines the third groove 135, the first cover plate 2, the second cover plate 3, and the rotor 4 form the third flow channel 50.

[0060] In some embodiments, the connecting channel 12 includes a first channel 122, which includes a direct current channel 1222 and an oblique current channel 1221. The direct current channel 1222 extends radially along the shaft body 1, and the oblique current channel 1221 is inclined to the direct current channel 1222. The direct current channel 1222 communicates with the oblique current channel 1221, and the oblique current channel 1221 communicates with the inlet 11. The direct current channel 1222 has a first outlet 121. By configuring the connecting channel 12 to include the direct current channel 1222 and the oblique current channel 1221, and the oblique current channel 1221 and the direct current channel 1222 being inclined, the direction of the cooling medium entering the guide groove 13 from the connecting channel 12 can be adjusted.

[0061] In actual production, the inclined flow channel 1221 can be connected to the guide channel, and the connection between the guide channel and the inclined flow channel 1221 can be sealed with a plug.

[0062] Working principle: Oil enters the inlet hole 11 through the inlet pipe 5, and then flows from the inlet hole 11 into the guide groove 13 via the connecting flow channel 12. As the oil flows in the guide groove 13, it cools the rotor 4. From the guide groove 13, the oil enters the first hole 21 through the second outlet 131, and then enters the second hole 31 through the third outlet 132. Finally, it is thrown onto the stator from both the first hole 21 and the second hole 31, cooling the stator.

[0063] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0066] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rotating shaft, characterized in that, include: Shaft body (1), the shaft body (1) having: The first end (14) and the second end (15) opposite to the first end (14); An outer peripheral wall (19) is located between the first end (14) and the second end (15); Inlet hole (11); A connecting channel (12) is located inside the shaft body (1) and has a first outlet (121); and A flow guide (13) is located on the outer peripheral wall (19) and extends along the axial direction of the shaft body (1). The flow guide (13) has a second outlet (131) and a third outlet (132). The first outlet (121) is connected to the guide groove (13), the second outlet (131) is located on the shaft body (1) near the first end (14), the third outlet (132) is located on the shaft body (1) near the second end (15), at least a portion of the connecting channel (12) is radially inclined to the shaft body (1), and the inlet (11) is connected to the guide groove (13) through the connecting channel (12).

2. The rotating shaft according to claim 1, characterized in that, The flow channel (13) is used to circulate the cooling medium, and the position of the first outlet (121) is such that the flow rate of the cooling medium flowing through the second outlet (131) is the same as the flow rate of the cooling medium flowing through the third outlet (132).

3. The rotating shaft according to claim 2, characterized in that, Along the axial direction of the shaft body (1), the distance between the center point of the first outlet (121) and the center point of the second outlet (131) is equal to the distance between the center point of the first outlet (121) and the center point of the third outlet (132).

4. The rotating shaft according to claim 3, characterized in that, The shaft body (1) has a first manifold (16) near the first end (14), and a second manifold (17) near the second end (15). The first manifold (16) is connected to the second outlet (131), and the second manifold (17) is connected to the third outlet (132).

5. The rotating shaft according to claim 4, characterized in that, The guide channel (13) includes a first channel (133), the first channel (133) includes a first sub-channel (1331) and a second sub-channel (1332), the first sub-channel (1331) has a second outlet (131), the second sub-channel (1332) has a third outlet (132), the shaft body (1) has a third confluence channel (18), the third confluence channel (18) is located between the first sub-channel (1331) and the second sub-channel (1332), and the first outlet (121), the first sub-channel (1331) and the second sub-channel (1332) are all connected to the third confluence channel (18).

6. The rotating shaft according to claim 4, characterized in that, The flow guide groove (13) includes a second groove (134), the second groove (134) includes a third sub-groove (1341) and a fourth sub-groove (1342), the third sub-groove (1341) has a second outlet (131), the fourth sub-groove (1342) has a third outlet (132), the connecting flow channel (12) is connected to both the third sub-groove (1341) and the fourth sub-groove (1342), and the third sub-groove (1341) and the fourth sub-groove (1342) are spaced apart circumferentially along the shaft body (1).

7. The rotating shaft according to claim 4, characterized in that, The guide groove (13) includes a third groove (135) having a second outlet (131) and a third outlet (132), the third groove (135) extending from a portion of the shaft body (1) near the first end (14) to a portion of the shaft body (1) near the second end (15).

8. The rotating shaft according to any one of claims 1-7, characterized in that, The connecting channel (12) includes a first channel (122), which includes an oblique channel (1221) and a direct channel (1222). The direct channel (1222) extends radially along the shaft body (1). The oblique channel (1221) and the direct channel (1222) are inclined to each other. The direct channel (1222) communicates with the oblique channel (1221). The oblique channel (1221) communicates with the inlet (11). The direct channel (1222) has a first outlet (121).

9. The rotating shaft according to any one of claims 1-7, characterized in that, The connecting channel (12) includes a second channel (123) having a first outlet (121), and one end of the shaft body (1) defining the second channel (123) opposite to the first outlet (121) is connected to the shaft body (1) defining the inlet (11).

10. A rotor assembly, characterized in that, include: The shaft as described in any one of claims 1-9; A first cover plate (2) is sleeved on the shaft body (1) and connected to the shaft body (1). The first cover plate (2) has a first hole (21) and the first hole (21) communicates with the second outlet (131). A second cover plate (3) is fitted onto and connected to the shaft body (1), the second cover plate (3) having a second hole (31) communicating with the third outlet (132); and Rotor (4), which is sleeved on and connected to the shaft body (1), and is located between the first cover plate (2) and the second cover plate (3).

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