CN209435049U - Motor cycle cooling system and its oil-cooled motor structure - Google Patents

Abstract

The utility model provides a motor circulative cooling system and oil-cooled motor structure thereof, motor circulative cooling system contain a motor casing, an oil-cooled motor structure and an oil return subassembly. The oil-cooled motor structure is arranged in the motor shell and comprises a rotating shaft, a rotor bushing, a rotor assembly and a stator assembly. The rotating shaft is pivoted to the motor shell and is provided with a shaft hole and a lateral opening which are communicated. The rotor bushing is sleeved on the rotating shaft and provided with an oil injection channel which penetrates through the rotor bushing from an inner side wall and extends to an outer side wall, and the oil injection channel is communicated with the lateral opening. The rotor assembly is sleeved on the outer side wall. The stator assembly is fixedly arranged on the motor shell and comprises a plurality of insulation frames provided with a slot. The oil return assembly is communicated with the motor shell and the shaft hole and is used for sending the cooling oil contained in the inner space into the shaft hole. When the rotor assembly drives the rotor bushing and the rotating shaft to rotate, the cooling oil is thrown out of the rotor bushing and sprayed to the coil. The utility model discloses can effectively reduce motor coil's temperature.

Description

Motor cycle cooling system and its oil-cooled motor structure

technical field

The utility model relates to a motor circulating cooling system and its oil-cooled motor structure, in particular to a motor circulating cooling system and its oil-cooled motor structure which uses the rotation of a rotor assembly to spray cooling oil to coils for cooling.

Background technique

In recent years, the permanent magnet synchronous motor technology has matured and developed. It has the characteristics of high power density, high efficiency and small size. Better energy saving effect.

Generally speaking, the traditional air-cooled motor is easy to increase the temperature of the motor coil due to long running time or continuous acceleration and deceleration, and the magnet in the motor is prone to demagnetization risk in high temperature environment . In contrast, since the oil-cooled motor can use the cooling oil to directly contact the stator or the magnet, it can quickly take away the heat, so that the motor can effectively control the temperature in various operating modes to maintain the motor efficiency and greatly improve the performance of the motor. To achieve the effect of energy saving; however, in the prior art, most of the oil-cooled motors directly set the oil pipeline on the motor casing, and then indirectly conduct heat exchange with the stator coil through the motor casing, so the cooling that can be achieved There are still limits to the effect.

Utility model content

In view of the fact that in the prior art, although the efficiency of the oil-cooled motor is better than that of the water-cooled motor, most of the oil-cooled motors have the oil circuit installed in the motor casing, and then the motor coil is heated by indirect heat transfer. For heat dissipation and cooling, the effect of cooling is still limited; therefore, the main purpose of this utility model is to provide a motor circulation cooling system and its oil-cooled motor structure, which can directly contact the cooling oil with the motor coil, so as to effectively reduce the temperature of the motor coil.

As mentioned above, in order to solve the problems of the prior art, the necessary technical means adopted by the utility model is to provide an oil-cooled motor structure, the oil-cooled motor structure is arranged in a motor housing, and the motor housing has an inner space and a The oil return hole at the bottom accommodates a cooling oil in the inner space, and the oil return hole at the bottom communicates with the inner space. The structure of the oil-cooled motor includes a rotating shaft, a rotor bushing, a rotor assembly and a stator assembly.

The rotating shaft is rotatably passed through the motor casing, and is provided with a shaft hole and at least one side opening connected to the shaft hole, and the shaft hole is connected to an oil return assembly, and the oil return assembly is connected to the bottom oil return hole. The rotor bushing is sleeved on the rotating shaft in the inner space, has an inner wall attached to the rotating shaft and an outer wall away from the rotating shaft, and at least one oil injection channel extends from the inner wall through the rotor bushing to the outer wall, And at least one oil injection channel communicates with at least one lateral opening on the inner wall. The rotor assembly is sheathed on the outer wall, and at least one oil injection channel is exposed outside the rotor assembly on the outer wall.

The stator assembly is fixed on the motor casing, and there is an extending space communicated with at least one oil injection channel between the rotor bush and the stator assembly, and the stator assembly includes a plurality of insulating frames and a plurality of coils. A plurality of insulating frames are located in the inner space, and each insulating frame includes a winding part and a blocking part. The winding portion is away from the rotor assembly. The blocking part is located between the winding part and the rotor assembly, and has at least one slot. A plurality of coils are respectively wound on the winding portion of the insulating frame, and are partially exposed to the extending space at at least one slot of the insulating frame.

In a subsidiary technical means derived from the above necessary technical means, the outer wall is provided with a plurality of oil outlets communicating with at least one oil injection channel, and the oil injection channel includes at least one main oil injection pipeline and a plurality of branch oil injection channels. Pipelines, at least one main fuel injection pipeline communicates with at least one lateral opening at the inner side wall, and the branch fuel injection pipelines respectively extend from at least one main fuel injection pipeline to the oil outlet.

In a subsidiary technical means derived from the above necessary technical means, the rotor bushing includes a shaft connecting end and a rotor connecting end, the rotating shaft connecting end is sleeved on the rotating shaft and has an inner side wall, and the rotor connecting end is integrally formed ground connected to the connecting end of the rotating shaft and away from the rotating shaft, and the connecting end of the rotor has an outer wall.

In an auxiliary technical means derived from the above necessary technical means, the stator assembly further includes a stator structure, the stator structure includes a plurality of stator teeth, and the winding parts of the plurality of insulating frames are respectively sleeved on the plurality of stator teeth.

In order to solve the problems of the prior art, another necessary technical means adopted by the utility model is to provide a motor circulating cooling system, which includes a motor casing, an oil-cooled motor structure and an oil return assembly. The motor casing has an inner space and a bottom oil return hole, the inner space accommodates a cooling oil, and the bottom oil return hole communicates with the inner space.

The structure of the oil-cooled motor includes a rotating shaft, a rotor bushing, a rotor assembly and a stator assembly. The rotating shaft is rotatably passed through the motor casing, and defines a shaft hole and at least one side opening communicating with the shaft hole. The rotor bushing is sleeved on the rotating shaft in the inner space, has an inner wall attached to the rotating shaft and an outer wall away from the rotating shaft, and at least one oil injection channel extends from the inner wall through the rotor bushing to the outer wall, And at least one oil injection channel communicates with at least one lateral opening on the inner wall. The rotor assembly is sheathed on the outer wall, and at least one oil injection channel is exposed outside the rotor assembly on the outer wall.

The stator assembly is fixed on the motor casing, and there is an extending space communicated with at least one oil injection channel between the rotor bush and the stator assembly, and the stator assembly includes a plurality of insulating frames and a plurality of coils. A plurality of insulating frames are located in the inner space, and each insulating frame includes a winding part and a blocking part. The wire winding part is far away from the rotor assembly, and the barrier part is located between the wire winding part and the rotor assembly, and is provided with at least one slot. A plurality of coils are respectively wound on the winding portion of the insulating frame, and are partially exposed to the extending space at at least one slot of the insulating frame. The oil return assembly is connected to the bottom oil return hole and the shaft hole.

In a subsidiary technical means derived from the above necessary technical means, the outer wall is provided with a plurality of oil outlets communicating with at least one oil injection channel, and the oil injection channel includes at least one main oil injection pipeline and a plurality of branch oil injection pipes At least one main fuel injection pipeline communicates with at least one lateral opening at the inner wall, and a plurality of branch fuel injection pipelines respectively extend from at least one main fuel injection pipeline to multiple oil outlets.

In a subsidiary technical means derived from the above necessary technical means, the rotor bushing includes a shaft connecting end and a rotor connecting end, the rotating shaft connecting end is sleeved on the rotating shaft and has an inner side wall, and the rotor connecting end is integrally formed ground connected to the connecting end of the rotating shaft and away from the rotating shaft, and the connecting end of the rotor has an outer wall.

In an auxiliary technical means derived from the above necessary technical means, the stator assembly further includes a stator structure, the stator structure includes a plurality of stator teeth, and the winding parts of the plurality of insulating frames are respectively sleeved on the plurality of stator teeth.

In an auxiliary technical means derived from the above necessary technical means, the motor circulation cooling system also includes a heat exchanger, which is arranged between the oil-cooled motor structure and the oil return assembly, and communicated with the bottom oil return hole and the oil return assembly respectively .

As mentioned above, the structure of the oil-cooled motor of the present invention is that when the rotor assembly is rotated by the magnetic force of the stator assembly, the rotor bushing and the rotating shaft are connected through the rotor assembly, and then the rotating shaft and the rotor bushing are driven to rotate. There is a side hole in the shaft hole, so the cooling oil entering the shaft through the shaft hole will generate centrifugal force when the shaft rotates, and will be thrown into the connected oil injection channel from the side hole, and due to the rotor bushing It is also driven by the rotor assembly to rotate, so the cooling oil entering the oil injection channel will be sprayed out from the outer wall towards the insulating frame. At this time, because the insulating frame of the utility model has slots, the cooling oil will pass Through the slots, it directly contacts the coils on the insulating frame, so that the cooling oil directly cools the coils and effectively reduces the temperature of the coils.

Based on the above, the motor circulating cooling system of the present invention also returns the cooling oil in the motor casing to the rotating shaft through the oil return assembly, so that the coil can be cooled and cooled effectively in a circular manner. The heat exchanger arranged between the housings can also effectively reduce the temperature of the cooling oil, so as to effectively increase the temperature when the cooling oil flows back to the oil-cooled motor structure.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram showing the structure of an oil-cooled motor provided by the first preferred embodiment of the present invention;

Fig. 2 is a schematic cross-sectional view showing the structure of the oil-cooled motor provided by the first preferred embodiment of the present invention;

Fig. 3 is a schematic plan view showing the structure of the oil-cooled motor provided by the first preferred embodiment of the present invention; and

FIG. 4 is a system diagram showing the motor circulation cooling system provided by the second preferred embodiment of the present invention.

【Symbol Description】

100 Motor circulating cooling system

10 Motor housing

101 Bottom oil return hole

1 Oil-cooled motor structure

11 shafts

111 first end

1111 shaft hole

1112 Lateral opening

112 Second end

12 Rotor bushing

121 Shaft connection end

1211 inner wall

122 Rotor connection end

1221 Outer wall

12211 oil outlet

123 fuel injection channel

1231 main fuel injection line

1232 branch fuel injection line

13 Rotor Assembly

131 Rotor Collar

132 magnet

14 Stator assembly

141 stator structure

1411 Stator teeth

142 insulating frame

1421 Winding Department

1422 Barrier

143 Coils

15 fixed frame

2 heat exchangers

3 oil return assembly

S slot

MS interior space

Detailed ways

Please refer to Fig. 1 and Fig. 2, Fig. 1 is a three-dimensional schematic diagram showing the structure of the oil-cooled motor provided by the first preferred embodiment of the present invention; Schematic cross-sectional view of the motor structure. As shown in the figure, an oil-cooled motor structure 1 includes a shaft 11 , a rotor bushing 12 , a rotor assembly 13 , a stator assembly 14 and a fixed frame 15 .

The rotating shaft 11 includes a first end portion 111 and a second end portion 112 . The first end 111 is provided with a shaft hole 1111, and there are two lateral openings 1112 (only one is marked in the figure) between the first end 111 and the second end 112, and the two lateral openings 1112 are respectively It communicates with the shaft hole 1111. In this embodiment, the shaft hole 1111 is opened along the shaft center of the shaft 11 , and the two lateral openings 1112 penetrate along the radial direction of the shaft 11 to the shaft center of the shaft 11 , and then communicate with the shaft hole 1111 .

The rotor bushing 12 is sleeved on the shaft 11 and includes a shaft connection end 121 and a rotor connection end 122 . The shaft connection end 121 has an inner wall 1211 attached to the shaft 11 . The rotor connecting end 122 has an outer wall 1221 away from the rotating shaft 11 . Wherein, the rotor bushing 12 is also provided with an oil injection passage 123 extending from the inner side wall 1211 through the rotor bushing 12 to the two oil outlets 12211 of the outer side wall 1221, and the oil injection passage 123 includes two main oil injection pipelines 1231 ( Only one is marked in the figure) and four branch fuel injection pipelines 1232 (only one is marked in the figure); in this embodiment, the two main fuel injection pipelines 1231 are respectively communicated with the two lateral openings at the inner side wall 1211 1112, while the four branch fuel injection pipelines 1232 extend from the main fuel injection pipeline 1231 to the second oil outlet 12211 in groups of two, in other words, each main fuel injection pipeline 1231 communicates with two A branch fuel injection pipeline 1232.

The rotor assembly 13 is sheathed on the outer wall 1221, and includes a rotor collar 131 and a plurality of magnets 132 (only one is marked in the figure), the rotor collar 131 is sheathed on the outer wall 1221, and the plurality of magnets 132 are are respectively spaced through the rotor collar 131; in addition, in this embodiment, the inner side of the rotor collar 131 is buried in the outer wall 1221, and the two oil outlets 12211 are respectively exposed outside the rotor assembly 13, and Will not be blocked by the rotor assembly 13.

The stator assembly 14 includes a stator structure 141 , a plurality of insulating frames 142 (only one is marked in the figure), and a plurality of coils 143 (only one is marked in the figure). The stator structure 141 includes a plurality of stator teeth 1411 (only one is marked in the figure); wherein, the stator structure 141 is composed of a plurality of stator teeth in this embodiment, but it is not limited thereto. In other embodiments, it is also But it is a one-piece structure.

Each of the insulating frames 142 includes a winding portion 1421 and a blocking portion 1422 . The winding portion 1421 is sheathed on the stator tooth portion 1411 and away from the rotor assembly 13 . The barrier part 1422 is located between the winding part 1421 and the rotor assembly 13, and is provided with three slots S (only one is marked in the figure), and there is an oil outlet 12211 between the barrier part 1422 and the rotor connection end 122 Connected extended space (not shown in the figure). The plurality of coils 143 are respectively wound on the winding portions 1421 of the plurality of insulating frames 142 , and are partially exposed at the slot S in the extending space. The fixing frame 15 is an annular frame in this embodiment, and is used to fix the stator assembly 14 .

Please continue to refer to FIG. 2 and FIG. 3 . FIG. 3 is a schematic plan view showing the structure of the oil-cooled motor provided by the first preferred embodiment of the present invention. As shown in the figure, since the rotating shaft 11, the rotor bushing 12 and the rotor assembly 13 will rotate relative to the stator assembly 14, in practice, the stator assembly 14 is fixed on a motor housing (not shown) through a fixing frame 15 , and the rotating shaft 11 is rotatably arranged on the motor housing, so that the rotor assembly 13 can rotate relative to the stator assembly 14; however, when the rotating shaft 11 drives the rotor bushing 12 and the rotor assembly 13 to rotate, through the shaft hole 1111 The cooling oil entering the rotating shaft 11 will be thrown into the oil injection channel 123 from the side opening 1112 due to the rotation of the rotating shaft 11. When the cooling oil enters the oil injection channel 123 in the rotor bushing 12, the rotor bushing 12 will also As the rotating shaft 11 rotates, it will be further thrown out from the oil outlet 12211, and pass through the extending space and the slot S between the blocking part 1422 and the rotor connecting end 122, and then contact the coil 143, so as to effectively clean the coil 143 for cooling down. In addition, although in this embodiment, the two lateral openings 1112 are respectively connected to the two oil outlets 12211 through the two oil injection channels 123, but in other embodiments, even if only one lateral opening 1112, one injection The oil channel 123 and an oil outlet 12211 can also effectively throw the cooling oil to the coil 143 .

Please refer to FIG. 1 to FIG. 4 together. FIG. 4 is a system diagram showing a motor circulation cooling system provided by a second preferred embodiment of the present invention. As shown in the figure, a motor circulation cooling system 100 includes a motor casing 10 , the above-mentioned oil-cooled motor structure 1 , a heat exchanger 2 and an oil return assembly 3 .

The motor casing 10 has an inner space MS and a bottom oil return hole 101 ; wherein, the inner space MS accommodates a cooling oil (not shown), and the bottom oil return hole 101 communicates with the inner space MS.

The main structure of the oil-cooled motor structure 1 is as described in the first preferred embodiment above, and the connection between the oil-cooled motor structure 1 and the motor housing 10 will be described below.

Based on the above, the rotating shaft 11 is rotatably installed in the motor housing 10 . In practice, the first end 111 and the second end 112 of the rotating shaft 11 are respectively installed in the motor housing 10 through bearings. Therefore, the rotating shaft 11 can rotate relative to the motor housing 10 . The rotor bushing 12 is sheathed on the rotating shaft 11 in the internal space MS. The stator assembly 14 is fixed to the motor casing 10 through the fixing frame 15 , so that the rotating shaft 11 , the rotor bushing 12 and the rotor assembly 13 can rotate relative to the stator assembly 14 .

The heat exchanger 2 is connected to the oil return hole 101 at the bottom to cool the cooling oil in the inner space MS; in practice, the heat exchanger 2 can be, for example, a water-cooled or air-cooled pipeline for heat dissipation.

The oil return assembly 3 is connected to the heat exchanger 2 and the shaft hole 1111, and is used to send the cooling oil that has been cooled by the heat exchanger 2 back to the shaft 11 through the shaft hole 1111, so that the cooled cooling oil can pass through again. The rotation of the rotating shaft 11 and the rotor bushing 12 sprays the coil 143 , so that the coil 143 can continuously dissipate heat.

To sum up, since the oil-cooled motors in the prior art set the oil circuit in the motor casing, and then dissipate heat from the motor coils through indirect heat transfer, the cooling effect is limited; compared with this, this The oil-cooled motor structure provided by the utility model is that when the rotor assembly is rotated by the magnetic force of the stator assembly, the rotor bushing and the rotating shaft are connected through the rotor assembly, and then the rotating shaft and the rotor bushing are driven to rotate. There is a side hole in the shaft hole, so the cooling oil entering the shaft through the shaft hole will generate centrifugal force when the shaft rotates, and will be thrown into the connected oil injection channel from the side hole, and because the rotor bush is also affected The rotor assembly is driven to rotate, so the cooling oil entering the oil injection channel will be sprayed out from the outer wall towards the insulating frame. At this time, since the insulating frame of the utility model is provided with slots, the cooling oil will pass through the slots And it directly contacts the coils arranged on the insulating frame, and then the cooling oil directly cools the coils to effectively reduce the temperature of the coils. In addition, since the motor circulation cooling system of the present invention also returns the cooling oil in the motor housing to the rotating shaft through the oil return assembly, it can effectively circulate the cooling and cooling of the coils, and the present invention is between the oil return assembly and the motor housing Arranging a heat exchanger between them can reduce the temperature of the cooling oil more effectively, so as to effectively increase the temperature when the cooling oil flows back to the oil-cooled motor structure.

Through the detailed description of the preferred specific embodiments above, it is hoped that the features and spirit of the present utility model can be described more clearly, and the scope of the present utility model is not limited by the preferred specific embodiments disclosed above. On the contrary, the intention is to cover various changes and equivalent arrangements within the scope of the claims of the present invention.

Claims (9)

1. An oil-cooled motor structure, which is installed in the motor casing, the motor casing has an inner space and a bottom oil return hole, the inner space accommodates cooling oil, and the bottom oil return hole is connected to the interior space, characterized in that the oil-cooled motor structure includes: The rotating shaft is rotatably passed through the motor housing, and is provided with a shaft hole and at least one side opening connected to the shaft hole, and the shaft hole is connected to the oil return assembly, and the oil return assembly communicated with the oil return hole at the bottom; The rotor bush is sleeved on the rotating shaft in the inner space, has an inner wall attached to the rotating shaft and an outer wall far away from the rotating shaft, and has at least one rotor bushing penetrating from the inner wall. Covering and extending to the oil injection channel on the outer side wall, and the at least one oil injection channel communicates with the at least one lateral opening on the inner side wall; a rotor assembly, sleeved on the outer wall, and the at least one oil injection channel is exposed outside the rotor assembly on the outer wall; and The stator assembly is fixed on the motor housing, and has an extending space communicating with the at least one oil injection channel between the rotor bush and the stator assembly, and the stator assembly includes: A plurality of insulating shelves located in the interior space, each insulating shelf comprising: a winding portion remote from the rotor assembly; and The blocking part is located between the winding part and the rotor assembly, and has at least one slot; and A plurality of coils are respectively wound on the winding portions of the plurality of insulating frames, and are partially exposed in the extending space at the at least one slot of the plurality of insulating frames. 2. The oil-cooled motor structure according to claim 1, wherein the outer wall is provided with a plurality of oil outlets communicating with the at least one oil injection channel, and the at least one oil injection channel includes at least one The main fuel injection pipeline and a plurality of branch fuel injection pipelines, the at least one main fuel injection pipeline communicates with the at least one lateral opening at the inner side wall, and the multiple branch fuel injection pipelines are respectively The at least one main oil injection pipeline extends to the plurality of oil outlets. 3. The oil-cooled motor structure according to claim 1, wherein the rotor bushing includes a shaft connecting end and a rotor connecting end, the rotating shaft connecting end is sheathed on the rotating shaft, and has the The inner wall, the rotor connecting end is integrally connected to the rotating shaft connecting end, and is away from the rotating shaft, and the rotor connecting end has the outer wall. 4. The oil-cooled motor structure according to claim 1, wherein the stator assembly further includes a stator structure, the stator structure includes a plurality of stator teeth, and the winding portions of the plurality of insulating frames respectively sleeved on the plurality of stator teeth. 5. The motor circulation cooling system is characterized in that it comprises: The motor housing has an inner space and a bottom oil return hole, the inner space accommodates cooling oil, and the bottom oil return hole communicates with the inner space; Oil-cooled motor structure, including: The rotating shaft is rotatably passed through the motor housing, and is provided with a shaft hole and at least one lateral opening communicating with the shaft hole; The rotor bush is sleeved on the rotating shaft in the inner space, has an inner wall attached to the rotating shaft and an outer wall far away from the rotating shaft, and has at least one rotor bushing penetrating from the inner wall. Covering and extending to the oil injection channel on the outer side wall, and the at least one oil injection channel communicates with the at least one lateral opening on the inner side wall; a rotor assembly, sleeved on the outer wall, and the at least one oil injection channel is exposed outside the rotor assembly on the outer wall; and The stator assembly is fixed on the motor housing, and has an extending space communicating with the at least one oil injection channel between the rotor bush and the stator assembly, and the stator assembly includes: A plurality of insulating shelves located in the interior space, each insulating shelf comprising: a winding portion remote from the rotor assembly; and The blocking part is located between the winding part and the rotor assembly, and has at least one slot; and A plurality of coils are respectively wound on the winding portions of the plurality of insulating frames, and are partially exposed in the extending space at the at least one slot of the plurality of insulating frames; and The oil return assembly communicates with the bottom oil return hole and the shaft hole. 6. The motor circulation cooling system according to claim 5, wherein the outer wall is provided with a plurality of oil outlets communicating with the at least one oil injection channel, and the at least one oil injection channel includes at least one The main fuel injection pipeline and a plurality of branch fuel injection pipelines, the at least one main fuel injection pipeline communicates with the at least one lateral opening at the inner side wall, and the multiple branch fuel injection pipelines are respectively The at least one main oil injection pipeline extends to the plurality of oil outlets. 7. The motor circulation cooling system according to claim 5, wherein the rotor bushing includes a shaft connecting end and a rotor connecting end, the rotating shaft connecting end is sheathed on the rotating shaft, and has the The inner wall, the rotor connecting end is integrally connected to the rotating shaft connecting end, and is away from the rotating shaft, and the rotor connecting end has the outer wall. 8. The motor circulation cooling system according to claim 5, wherein the stator assembly further comprises a stator structure, the stator structure comprises a plurality of stator teeth, and the winding portions of the plurality of insulating frames respectively sleeved on the plurality of stator teeth. 9. The motor circulation cooling system according to claim 5, further comprising a heat exchanger, arranged between the oil-cooled motor structure and the oil return assembly, and communicated with the bottom oil return components respectively hole with the oil return assembly.