Cooling oil quantity distribution structure

Abstract

The utility model provides a cooling oil flow distribution structure which comprises a rotating shaft, the periphery of the rotating shaft is fixedly sleeved with a rotor support, the two axial sides of the rotor support are fixedly provided with a left side rotor pressing plate and a right side rotor pressing plate respectively, and a rotor magnetic steel assembly is fixedly contained on the periphery of the rotor support and located between the left side rotor pressing plate and the right side rotor pressing plate. The motor rotor is characterized in that a left oil retainer and a right oil retainer are fixed to the two ends of an inner cavity of the rotating shaft respectively, an oil guide pipe is inserted into the inner cavity of the rotating shaft from one side and arranged in an inner cavity of the left oil retainer in a penetrating mode, and cooling oil enters and flows through the left oil retainer, an inner cavity of the rotor and the right oil retainer through the oil guide pipe; the cooling of the left bearing, the left winding, the rotor core assembly, the right bearing and the right winding is realized; cooling oil in the shaft can be distributed more reasonably, and the motor power and the service life of the motor are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy vehicle motor cooling technology, and specifically relates to a cooling oil quantity distribution structure. Background Art

[0002] With the development of new energy vehicles, the power density of drive motors is getting higher and higher, the speed is getting higher and higher, and the loss of motors is increasing accordingly. Improving the heat dissipation efficiency of motors has become a technical problem that needs to be solved urgently.

[0003] At present, the cooling methods of drive motors are mainly water cooling and oil cooling. The cooling method of oil-cooled motors is mainly to cool the stator by passing oil over the stator, to cool the winding end by directly spraying oil to the coil through the oil spray ring, and to cool the inside of the rotor by passing oil inside the shaft. The cooling oil in the rotor shaft can cool the rotor magnets as well as the rotor bearings and the winding ends, thereby improving the motor power and motor life.

[0004] However, many oil-cooled motors currently have an uneven flow ratio when oil flows through the shaft to the parts that need cooling, resulting in unsatisfactory cooling results and, in turn, a decrease in motor power.

[0005] Therefore, there is an urgent need to provide a cooling oil distribution structure to solve the defects and shortcomings of the above-mentioned prior art. Utility Model Content

[0006] In order to solve the defects and shortcomings in the prior art, the utility model provides a cooling oil distribution structure.

[0007] The technical solution provided by the utility model is as follows:

[0008] A cooling oil flow distribution structure comprises a rotating shaft, an outer peripheral fixed sleeve of the rotating shaft is provided with a rotor support, a left rotor pressure plate and a right rotor pressure plate are respectively fixedly provided on both axial sides of the rotor support, and a rotor magnetic steel assembly is fixedly accommodated on the outer periphery of the rotor support and between the left and right rotor pressure plates, characterized in that a left oil retaining ring and a right oil retaining ring are respectively fixed at both ends of the inner cavity of the rotating shaft, an oil guide pipe is inserted into the inner cavity of the rotating shaft from one side and penetrates the inner cavity of the left oil retaining ring, and the cooling oil enters through the oil guide pipe and flows through the left oil retaining ring, the rotor inner cavity and the right oil retaining ring, thereby realizing the cooling of the left bearing, the left winding, the rotor core assembly, the right bearing and the right winding.

[0009] As a further preferred embodiment of the present utility model, the outer wall of the oil guide pipe is provided with a first oil guide pipe outlet, a second oil guide pipe outlet and a third oil guide pipe outlet in sequence along the inflow direction of the cooling oil, wherein the first oil guide pipe outlet is connected to the left bearing, the second oil guide pipe outlet is connected to the left winding, and the third oil guide pipe outlet is connected to the inner cavity of the rotating shaft.

[0010] As a further preferred embodiment of the utility model, the outer wall of the rotating shaft is provided with a left bearing oil-flinging hole, a left winding oil-flinging hole, a rotor bracket first oil-flinging hole, a rotor bracket second oil-flinging hole, a right bearing oil-flinging hole and a right winding oil-flinging hole in sequence along the cooling oil inflow direction; wherein, the two ends of the left bearing oil-flinging hole are respectively connected to the first outlet of the oil guide pipe and the left bearing, the two ends of the left winding oil-flinging hole are respectively connected to the second outlet of the oil guide pipe and the left winding, the two ends of the first oil-flinging hole of the rotor bracket and the second oil-flinging hole of the rotor bracket are respectively connected to the rotor inner cavity and the rotor magnetic steel assembly, the two ends of the right bearing oil-flinging hole are respectively connected to the rotor inner cavity and the right bearing, and the two ends of the right winding oil-flinging hole are respectively connected to the rotor inner cavity and the right winding.

[0011] As a further preferred embodiment of the utility model, the outer wall of the left oil retaining ring is provided with a left middle oil hole, and the left middle oil hole is located between the first outlet of the oil guide pipe and the oil throwing hole of the left bearing, and connects the first outlet of the oil guide pipe and the oil throwing hole of the left bearing.

[0012] As a further preferred embodiment of the present utility model, the cross-sectional radius of the left oil retaining ring is larger than the cross-sectional radius of the inner cavity of the rotating shaft.

[0013] As a further preferred embodiment of the utility model, a left oil hole and a right oil hole are respectively provided on both axial sides of the right oil retaining ring, and a right middle oil hole is provided on the outer wall of the right oil retaining ring, the left oil hole is connected to the inner cavity of the rotating shaft, the right middle oil hole is connected to the right bearing, and the right oil hole is connected to the right winding.

[0014] As a further preferred embodiment of the present utility model, the cross-sectional radius of the right oil retaining ring is larger than the cross-sectional radius of the inner cavity of the rotating shaft.

[0015] As a further preferred embodiment of the present invention, the number, shape and arrangement of the left oil hole, the right middle oil hole and the right oil hole are different from each other.

[0016] As a further preferred embodiment of the present invention, the left oil hole, the right middle oil hole and the right oil hole are configured as at least one of square holes, circular holes, elliptical holes or triangular holes.

[0017] As a further preferred embodiment of the utility model, the cooling oil entering the oil guide pipe,

[0018] The first part is connected with the left bearing via the first outlet of the oil guide pipe, the left middle oil hole and the left bearing oil throwing hole in sequence;

[0019] The second part is connected with the left winding via the second outlet of the oil guide pipe, the inner cavity of the rotating shaft and the oil throwing hole of the left winding in sequence;

[0020] The third part reaches the inner cavity of the rotating shaft through the third outlet of the oil guide pipe, and then,

[0021] A part of it is connected to the right bearing through the left oil hole, the right middle oil hole and the right bearing oil throwing hole in sequence;

[0022] The other part is connected with the right winding through the left oil hole, the right oil hole and the right winding oil throwing hole in sequence;

[0023] Another part is connected to the rotor magnetic steel assembly through the first oil-spinning hole of the rotor support and the second oil-spinning hole of the rotor support.

[0024] Compared with the prior art, the beneficial effects achieved by the utility model include:

[0025] 1) The utility model provides a cooling oil distribution structure. By providing a left oil retaining ring, most of the oil flowing out of the first outlet of the oil guide pipe can enter the oil-slinging hole of the left bearing to provide lubrication and cooling for the left bearing; and the left oil retaining ring can also make all the oil flowing out of the second outlet of the oil guide pipe flow out from the oil-slinging hole in the shaft, avoiding the cooling oil from flowing out of the leftmost outlet of the rotating shaft, thereby avoiding the waste of coolant.

[0026] 2) The utility model provides a cooling oil distribution structure, which can prevent excessive accumulation of cooling oil at the right bearing and the right winding end by providing a right oil retaining ring, thereby avoiding insufficient cooling oil flow distribution of the rotor bracket and reducing the risk of over-temperature demagnetization at the rotor magnetic steel assembly position.

[0027] 3) The utility model provides a cooling oil distribution structure, which can make the cooling oil distribution in the shaft more reasonable, effectively improving the motor power and motor life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural sectional view of the utility model.

[0029] Figure 2 This is a structural schematic diagram of the oil guide pipe provided by the utility model.

[0030] Figure 3 This is a structural sectional view of the rotating shaft provided by the utility model.

[0031] Figure 4This is a structural schematic diagram of the left oil retaining ring provided by the utility model.

[0032] Figure 5 This is a structural schematic diagram of the right oil retaining ring provided by the utility model. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] [First embodiment]

[0037] like Figure 1-5 The figure shows a cooling oil flow distribution structure provided by the first embodiment of the utility model, including a rotating shaft 3, a rotor bracket 4 is fixedly sleeved on the outer periphery of the rotating shaft 3, a left rotor pressure plate 6 and a right rotor pressure plate 7 are fixedly arranged on the axial sides of the rotor bracket 4, and a rotor magnetic steel assembly is fixedly accommodated on the outer periphery of the rotor bracket 4 and between the left and right rotor pressure plates.

[0038] In this embodiment, if Figure 1As shown, a left oil retaining ring 2 and a right oil retaining ring 5 are respectively fixed at both ends of the inner cavity of the rotating shaft 3, and an oil guide pipe 1 is inserted into the inner cavity of the rotating shaft 3 from one side and penetrates the inner cavity of the left oil retaining ring 2. After the cooling oil enters through the oil guide pipe 1 and flows through the left oil retaining ring 2, the inner cavity of the rotor 3 and the right oil retaining ring 5, the left bearing, the left winding, the rotor core assembly, the right bearing and the right winding are cooled.

[0039] like Figure 2 As shown, the outer wall of the oil guide pipe 1 in this embodiment is provided with a first oil guide pipe outlet 1-1, a second oil guide pipe outlet 1-2 and a third oil guide pipe outlet 1-3 in sequence along the cooling oil inflow direction, wherein the first oil guide pipe outlet 1-1 is connected to the left bearing, the second oil guide pipe outlet 1-2 is connected to the left winding, and the third oil guide pipe outlet 1-3 is connected to the inner cavity of the rotating shaft 3; the cooling oil entering the oil guide pipe 1 can realize cooling and lubrication of the left bearing through the first oil guide pipe outlet 1-1, realize cooling and lubrication of the left winding through the second oil guide pipe outlet 1-2, and flow into the inner cavity of the rotating shaft 3 through the third oil guide pipe outlet 1-3 to realize cooling and lubrication of the right winding, the right bearing and the rotor magnetic steel assembly.

[0040] like Figure 3 As shown, in this embodiment, the outer wall of the rotating shaft 3 is provided with a left bearing oil-slinging hole 3-1, a left winding oil-slinging hole 3-2, a rotor bracket first oil-slinging hole 3-3, a rotor bracket second oil-slinging hole 3-4, a right bearing oil-slinging hole 3-5 and a right winding oil-slinging hole 3-6 in sequence along the cooling oil inflow direction; wherein, the two ends of the left bearing oil-slinging hole 3-1 are respectively connected to the first outlet 1-1 of the oil guide pipe and the left bearing, and the cooling oil in the oil guide pipe can achieve lubrication and cooling of the left bearing after passing through the first outlet 1-1 of the oil guide pipe and the left bearing oil-slinging hole 3-1; the two ends of the left winding oil-slinging hole 3-2 are respectively connected to the second outlet 1-2 of the oil guide pipe and the left winding, and the cooling oil in the oil guide pipe can achieve lubrication and cooling of the left bearing after passing through the second outlet 1-2 of the oil guide pipe and the left winding oil-slinging hole 3-2 Lubrication and cooling of the left winding; the two ends of the first oil-fling hole 3-3 of the rotor bracket and the second oil-fling hole 3-4 of the rotor bracket are respectively connected to the inner cavity of the rotor 3 and the rotor magnetic steel assembly, and the cooling oil in the oil guide pipe enters the inner cavity of the rotating shaft 3 after passing through the third outlet 1-3 of the oil guide pipe, and can realize lubrication and cooling of the rotor magnetic steel assembly through the first oil-fling hole 3-3 of the rotor bracket and the second oil-fling hole 3-4 of the rotor bracket; at the same time, the two ends of the right bearing oil-fling hole 3-5 are respectively connected to the inner cavity of the rotor 3 and the right bearing, and the two ends of the right winding oil-fling hole 3-6 are respectively connected to the inner cavity of the rotor 3 and the right winding, and the cooling oil entering the inner cavity of the rotating shaft 3 can realize lubrication and cooling of the right bearing through the right bearing oil-fling hole 3-5, and realize lubrication and cooling of the right winding through the right winding oil-fling hole 3-6.

[0041] like Figure 4As shown, the outer wall of the left oil retaining ring 2 in this embodiment is provided with a left middle oil hole 2-1, which is located between the first outlet 1-1 of the oil guide pipe and the oil-throwing hole 3-1 of the left bearing, and connects the first outlet 1-1 of the oil guide pipe with the oil-throwing hole 3-1 of the left bearing; by providing the left oil retaining ring 2, most of the oil flowing out of the first outlet 1-1 of the oil guide pipe can enter the oil-throwing hole 3-1 of the left bearing through the left middle oil hole 2-1, so as to provide sufficient lubrication and cooling for the left bearing; at the same time, the cross-sectional radius of the left oil retaining ring 2 is larger than the cross-sectional radius of the inner cavity of the rotating shaft 3, so as to block the oil flowing out of the second outlet 1-2 of the oil guide pipe, so that all of it can flow out from the left winding oil-throwing hole 3-2, thereby preventing the cooling oil from flowing out of the leftmost outlet of the rotating shaft, and avoiding the occurrence of coolant waste.

[0042] like Figure 5 As shown, the right oil retaining ring 5 in this embodiment is provided with a left oil hole 5-1 and a right oil hole 5-3 on both axial sides, and the outer wall of the right oil retaining ring 5 is provided with a right middle oil hole 5-2. The left oil hole 5-1 is connected to the inner cavity of the rotating shaft 3, the right middle oil hole 5-2 is connected to the right bearing, and the right oil hole 5-3 is connected to the right winding, so that a part of the oil in the inner cavity of the rotating shaft 3 is connected to the right bearing through the left oil hole 5-1, the right middle oil hole 5-2 and the right bearing oil throwing hole 3-5 in sequence to achieve the right Lubrication and cooling of the bearing; the other part is connected to the right winding through the left oil hole 5-1, the right oil hole 5-3 and the right winding oil-swinging hole 3-6 in sequence to realize lubrication and cooling of the right winding. Preferably, the cross-sectional radius of the right oil retaining ring 5 is larger than the cross-sectional radius of the inner cavity of the rotating shaft 3. Therefore, by providing the right oil retaining ring, excessive accumulation of cooling oil at the right bearing and the end of the right winding can be prevented, thereby avoiding insufficient cooling oil flow distribution of the rotor bracket and reducing the risk of over-temperature demagnetization at the position of the rotor magnetic steel assembly.

[0043] Since the right oil retaining ring 5 in this embodiment mainly realizes flow distribution by changing the area of ​​the oil hole, the number, shape and arrangement of the left oil hole 5-1, the right middle oil hole 5-2 and the right oil hole 5-3 thereon can be set to be different from each other, and the left oil hole 5-1, the right middle oil hole 5-2 and the right oil hole 5-3 are set to at least one of square holes, circular holes, elliptical holes or triangular holes to meet different flow distribution requirements.

[0044] The above arrangement allows the cooling oil entering the oil guide pipe 1 to

[0045] The first part is connected to the left bearing via the first outlet 1-1 of the oil guide pipe, the left middle oil hole 2-1 and the left bearing oil throwing hole 3-1 in sequence;

[0046] The second part is connected with the left winding via the second outlet 1-2 of the oil guide pipe, the inner cavity of the rotating shaft 3 and the oil-spinning hole 3-2 of the left winding in sequence;

[0047] The third part reaches the inner cavity of the rotating shaft 3 through the third outlet 1-3 of the oil guide pipe in sequence, and then,

[0048] A part of it is connected to the right bearing through the left oil hole 5-1, the right middle oil hole 5-2 and the right bearing oil-slinging hole 3-5 in sequence;

[0049] The other part is connected to the right winding through the left oil hole 5-1, the right oil hole 5-3 and the right winding oil-swinging hole 3-5 in sequence;

[0050] Another part is connected to the rotor magnetic steel assembly through the first oil-throwing hole 3-3 of the rotor bracket and the second oil-throwing hole 3-4 of the rotor bracket.

[0051] The specific working process of this embodiment is as follows:

[0052] The cooling oil flows in from the inlet of the oil guide pipe 1 and first reaches the first outlet 1-1 of the oil guide pipe. A small part of the cooling oil will flow out from this position and enter between the left oil retaining ring 2 and the rotating shaft 3 through the left middle oil through hole 2-1 on the left oil retaining ring 2, and form a certain liquid level there. Under the action of centrifugal force, this part of the oil will be thrown from the left bearing oil throwing hole 3-1 to the left bearing, providing heat dissipation and lubrication for the left bearing.

[0053] When the cooling oil reaches the second outlet 1-2 of the oil guide pipe, part of the cooling oil will flow out from this position, and this part of the oil will be accumulated on the left side of the rotating shaft 3, and will be blocked by the left oil retaining ring 2, forming an oil accumulation here. This part of the oil will be thrown out from the left winding oil throwing hole 3-2 under the action of centrifugal force, providing cooling for the left winding.

[0054] Most of the cooling oil entering the oil guide pipe will be sprayed into the interior of the rotating shaft 3 from the third outlet 1-3 of the oil guide pipe. Due to inertia, the oil will first reach the rightmost end of the rotating shaft 3. Under the action of the right oil retaining ring 5, a part of the cooling oil will enter the interior of the right oil retaining ring 5 from the left oil hole 5-1 of the right oil retaining ring 5. This part of the oil will be divided into two paths. One path flows from the right middle oil hole 5-2 to the right bearing oil-spraying hole 3-5, and is sprayed onto the right bearing for lubrication and cooling under the action of centrifugal force; the other path passes through the right oil-spraying hole 5-3 to the right winding oil-spraying hole 3-6 of the rotating shaft 3, and is sprayed onto the right winding for cooling under the action of centrifugal force. Another part of the oil that reaches the shaft 3 will flow back to the left and enter the second oil-slinging hole 3-4 of the rotor bracket and the first oil-slinging hole 3-4 of the rotor bracket respectively. This part of the oil provides cooling for the rotor magnetic steel assembly. This part of the oil will flow to the left rotor pressure plate and the right rotor pressure plate respectively, and under the action of centrifugal force, it will be thrown out of the rotor pressure plate and flow to the end of the winding to cool it again. If there is no right oil retaining ring, most of the cooling oil will be thrown out from the right bearing and the oil-slinging hole at the end of the winding, resulting in insufficient cooling oil flow of the rotor bracket, and then there will be a risk of over-temperature demagnetization of the rotor magnetic steel.

[0055] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A cooling oil distribution structure, comprising a rotating shaft (3), a rotor support (4) being fixedly sleeved on the outer periphery of the rotating shaft (3), a left rotor pressure plate (6) and a right rotor pressure plate (7) being fixedly arranged on both axial sides of the rotor support (4), and a rotor magnetic steel assembly being fixedly accommodated on the outer periphery of the rotor support (4) and between the left and right rotor pressure plates, characterized in that: A left oil retaining ring (2) and a right oil retaining ring (5) are respectively fixed to both ends of the inner cavity of the rotating shaft (3); an oil guide pipe (1) is inserted into the inner cavity of the rotating shaft (3) from one side and is arranged in the inner cavity of the left oil retaining ring (2); cooling oil enters through the oil guide pipe (1) and flows through the left oil retaining ring (2), the inner cavity of the rotating shaft (3) and the right oil retaining ring (5), thereby cooling the left bearing, the left winding, the rotor core assembly, the right bearing and the right winding.

2. A cooling oil distribution structure according to claim 1, characterized in that: The outer wall of the oil guide pipe (1) is provided with a first oil guide pipe outlet (1-1), a second oil guide pipe outlet (1-2) and a third oil guide pipe outlet (1-3) in sequence along the cooling oil inflow direction, wherein the first oil guide pipe outlet (1-1) is connected to the left bearing, the second oil guide pipe outlet (1-2) is connected to the left winding, and the third oil guide pipe outlet (1-3) is connected to the inner cavity of the rotating shaft (3).

3. A cooling oil distribution structure according to claim 2, characterized in that: The outer wall of the rotating shaft (3) is provided with a left bearing oil-slinging hole (3-1), a left winding oil-slinging hole (3-2), a rotor support first oil-slinging hole (3-3), a rotor support second oil-slinging hole (3-4), a right bearing oil-slinging hole (3-5) and a right winding oil-slinging hole (3-6) in sequence along the cooling oil inflow direction; wherein the left bearing oil-slinging hole (3-1) has two ends connected to the first outlet (1-1) of the oil guide pipe and the left bearing, the left winding oil-slinging hole (3-2) has two ends connected to the second outlet (1-2) of the oil guide pipe and the left winding, the first rotor support oil-slinging hole (3-3) and the second rotor support oil-slinging hole (3-4) have two ends connected to the inner cavity of the rotating shaft (3) and the rotor magnetic steel assembly, the right bearing oil-slinging hole (3-5) has two ends connected to the inner cavity of the rotating shaft (3) and the right bearing, and the right winding oil-slinging hole (3-6) has two ends connected to the inner cavity of the rotating shaft (3) and the right winding.

4. A cooling oil distribution structure according to claim 3, characterized in that: The outer wall of the left oil retaining ring (2) is provided with a left middle oil through hole (2-1), the left middle oil through hole (2-1) being located between the first outlet (1-1) of the oil guide pipe and the left bearing oil throwing hole (3-1), and connecting the first outlet (1-1) of the oil guide pipe and the left bearing oil throwing hole (3-1).

5. The cooling oil distribution structure according to claim 1, characterized in that: The cross-sectional radius of the left oil retaining ring (2) is greater than the cross-sectional radius of the inner cavity of the rotating shaft (3).

6. A cooling oil distribution structure according to claim 4, characterized in that: The right oil retaining ring (5) is provided with a left oil hole (5-1) and a right oil hole (5-3) on both axial sides thereof, and the outer wall of the right oil retaining ring (5) is provided with a right middle oil hole (5-2), the left oil hole (5-1) is connected to the inner cavity of the rotating shaft (3), the right middle oil hole (5-2) is connected to the right bearing, and the right oil hole (5-3) is connected to the right winding.

7. The cooling oil distribution structure according to claim 1, characterized in that: The cross-sectional radius of the right oil retaining ring (5) is greater than the cross-sectional radius of the inner cavity of the rotating shaft (3).

8. The cooling oil distribution structure according to claim 6, characterized in that: The number, shape and arrangement of the left oil through hole (5-1), the right middle oil through hole (5-2) and the right oil through hole (5-3) are different from each other.

9. The cooling oil distribution structure according to claim 6, characterized in that: The left oil hole (5-1), the right middle oil hole (5-2) and the right oil hole (5-3) are configured as at least one of a square hole, a circular hole, an elliptical hole or a triangular hole.

10. The cooling oil distribution structure according to claim 6, characterized in that: The cooling oil entering the oil guide pipe (1) The first part is connected to the left bearing via the first outlet (1-1) of the oil guide pipe, the left middle oil hole (2-1) and the left bearing oil throwing hole (3-1) in sequence; The second part is connected to the left winding via the second outlet (1-2) of the oil guide pipe, the inner cavity of the rotating shaft (3) and the oil-spinning hole (3-2) of the left winding in sequence; The third part sequentially passes through the third outlet (1-3) of the oil guide pipe to reach the inner cavity of the rotating shaft (3), and then, A portion is connected to the right bearing via the left oil hole (5-1), the right middle oil hole (5-2) and the right bearing oil-slinging hole (3-5) in sequence; The other part is connected to the right winding via the left oil through hole (5-1), the right oil through hole (5-3) and the right winding oil throwing hole (3-6) in sequence; Another part is connected to the rotor magnetic steel assembly through the first oil-spinning hole (3-3) of the rotor support and the second oil-spinning hole (3-4) of the rotor support.

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