CN211280625U - Motor cooling structure - Google Patents
Motor cooling structure Download PDFInfo
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- CN211280625U CN211280625U CN201922310065.7U CN201922310065U CN211280625U CN 211280625 U CN211280625 U CN 211280625U CN 201922310065 U CN201922310065 U CN 201922310065U CN 211280625 U CN211280625 U CN 211280625U
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- motor
- cooling water
- pipe
- inlet
- water passage
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Abstract
The utility model provides a motor cooling structure can promote the cooling capacity of motor. The motor cooling structure includes: a motor; a cooling water passage provided in a housing of the motor; and a pipe connected to the cooling water passage. An inlet and an outlet of the cooling water passage are provided above the housing of the motor, and the pipe is connected to the inlet from a power drive unit and to a radiator from the outlet, and the pipe is configured to: the cooling water in the pipe passes through the power drive unit, flows into the cooling water passage from the inlet, and flows from the outlet to the radiator, wherein the pipe diameter of a section of the pipe connected to the inlet is smaller than the pipe diameters of other sections of the pipe, and the cross-sectional area of the section of the pipe connected to the inlet is smaller than the cross-sectional area of the cooling water passage.
Description
Technical Field
The utility model relates to a motor cooling structure.
Background
As is well known, an Electric Vehicle (EV) may be generally provided with a front axle Motor such as a Twin-Motor Unit (TMU), an Intelligent Power Unit (IPU), a Power Drive Unit (PDU), an engine, a rear axle Motor such as a Direct Drive Motor (DDM), and a transmission such as a dual-clutch transmission (DCT). Among them, a direct drive motor as a rear axle motor is generally interposed between an engine and a transmission, and thus can be structurally integrated with the engine and the transmission, and cooled by introducing cooling water flowing through the engine through a pipe.
However, as the technical field of electric vehicles expands, in order to secure the electric power required along with the increase in the assist frequency of the dual motor unit as the front axle motor, it is necessary to enhance the cooling capability of the direct drive motor as the rear axle motor. Therefore, there is a need for improvement in a manner of cooling a direct drive motor as a rear axle motor with cooling water flowing through the engine.
SUMMERY OF THE UTILITY MODEL
The utility model provides a motor cooling structure can promote the cooling capacity of motor.
The utility model provides a motor cooling structure, include: a motor; a cooling water passage provided in a housing of the motor; and a pipe connected to the cooling water passage, wherein an inlet and an outlet of the cooling water passage are provided above the housing of the motor, the pipe being connected from a power drive unit to the inlet and from the outlet to a radiator, the pipe being configured to: the cooling water in the pipe passes through the power drive unit, flows into the cooling water passage from the inlet, and flows from the outlet to the radiator, wherein the pipe diameter of a section of the pipe connected to the inlet is smaller than the pipe diameters of other sections of the pipe, and the cross-sectional area of the section of the pipe connected to the inlet is smaller than the cross-sectional area of the cooling water passage.
In an embodiment of the invention, the motor is arranged in a manner clamped between the engine and the gearbox.
In an embodiment of the present invention, the engine and the transmission are connected via a bypass path, the bypass path being provided in a housing of the motor.
In an embodiment of the present invention, a pump is provided between the motor and the radiator, and the piping is connected to the pump from the outlet of the cooling water passage, and connected to the power drive unit from the pump via the radiator.
Based on the above, in the utility model discloses an among the motor cooling structure, the motor cools off with the cooling water after flowing through the power drive unit, and wherein the entry and the export of cooling water passageway set up in the top of the shell of motor, and then the pipe diameter of the district section of the connection entry of piping sets up to be less than the pipe diameter of other district sections of piping to the sectional area of the district section of the connection entry of piping sets up to be less than the sectional area of cooling water passageway. In this way, compared to a method of cooling the motor with the cooling water after flowing through the engine, the cooling water after flowing through the power drive unit has a lower temperature, and the motor can be cooled efficiently, and the configuration of the pipe in the vicinity of the inlet enables the cooling water in the pipe to flow more smoothly into the cooling water passage to cool the motor. Therefore, the utility model discloses a motor cooling structure can promote the cooling capacity of motor.
In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic view of a cooling route in which a motor cooling structure according to an embodiment of the present invention is applied to a vehicle;
FIG. 2 is a side schematic view of the motor cooling arrangement of FIG. 1 in a housing of the motor;
FIG. 3 is a schematic top view of the motor cooling structure of FIG. 2 in the housing of the motor;
FIG. 4 is a cross-sectional view taken along line A-A of the motor cooling structure shown in FIG. 2;
FIG. 5 is a cross-sectional view taken along line B-B of the motor cooling structure shown in FIG. 2;
FIG. 6 is a cross-sectional view of the motor cooling structure shown in FIG. 2 taken along line C-C;
fig. 7 is a schematic sectional view of the motor cooling structure shown in fig. 2 taken along line D-D.
Description of reference numerals:
10: a vehicle;
12: a power drive unit;
14: an engine;
16: a gearbox;
18: a heat sink;
20: a water tank;
22: a pump;
100: a motor cooling structure;
110: a motor;
112: a housing;
120: a cooling water passage;
122. 142: an inlet;
124. 144, and (3) 144: an outlet;
130. 150: piping;
130 a: a segment;
132. 134, 152, 154: clamping;
140: a bypass path;
f: a front side;
r: and a back surface.
Detailed Description
Fig. 1 is a schematic diagram of a cooling route of a motor cooling structure 100 applied to a vehicle 10 according to an embodiment of the present invention, fig. 2 is a schematic diagram of a side view of the motor cooling structure 100 shown in fig. 1 on a housing 112 of a motor 110, fig. 3 is a schematic diagram of a top view of the motor cooling structure 100 shown in fig. 2 on the housing 112 of the motor 110, fig. 4 is a schematic diagram of a cross section of the motor cooling structure 100 shown in fig. 2 along a line a-a, fig. 5 is a schematic diagram of a cross section of the motor cooling structure 100 shown in fig. 2 along a line B-B, fig. 6 is a schematic diagram of a cross section of the motor cooling structure 100 shown in fig. 2 along a line C-C, and fig. 7 is a schematic diagram of a cross section of the motor cooling structure 100 shown in fig. 2. The overall structure of the motor cooling structure 100 of the present embodiment will be mainly described below with reference to fig. 1 to 3, and fig. 4 to 7 are sequentially added to assist in describing the structure of the motor cooling structure 100 at different locations.
Referring to fig. 1, in the present embodiment, a motor cooling structure 100 includes a motor 110, a cooling water passage 120, and a pipe 130. The motor cooling structure 100 can be applied to a vehicle 10, which is, for example, an electric vehicle, and can be provided with a front axle motor (not shown), a power drive unit 12, an engine 14, a rear axle motor or motor 110, a transmission 16, and a radiator (radiator) 18. The front axle motor may be a dual motor unit, the rear axle motor, motor 110, may be a direct drive motor, and the gearbox 16 may be a dual clutch gearbox. However, the vehicle 10 to which the motor cooling structure 100 is applied is not limited to the above configuration, that is, the vehicle 10 is not limited to an electric vehicle having a front axle motor and a rear axle motor, and the specific structure thereof can be adjusted according to the requirements.
The motor 110 as a rear axle motor is provided so as to be sandwiched between the engine 14 and the transmission case 16, and thus can be structurally integrated with the engine 14 and the transmission case 16. In the prior art, the motor serving as the rear axle motor is cooled by introducing the cooling water flowing through the engine through the pipe, but in the present embodiment, the motor 110 serving as the rear axle motor is cooled by introducing the cooling water flowing through the power drive unit 12 through the pipe 130. In addition, although the cooling water passage 120 shown in fig. 1 passes through the motor 110 in a straight line as a schematic illustration to describe the connection relationship between the cooling water passage 120 and the motor 110, reference is made to fig. 2 and 3 for the actual structure of the cooling water passage 120 and the motor 110.
Referring to fig. 2 to 3, in the present embodiment, the motor 110 has a flat housing 112 and electronic components (not shown) such as a stator (stator) and a rotor (rotor) mounted inside the housing 112. The front face F of the motor 110 faces the engine 14 shown in fig. 1 and corresponds to the front end of the vehicle 10, and the rear face R of the motor 110 faces the transmission 16 shown in fig. 1 and corresponds to the rear end of the vehicle 10. The front surface F and the back surface R are only used for illustrating the structure in the drawings and are not used for limitation. The cooling water passage 120 is, for example, a water jacket (water socket) of the motor 110, is provided in the housing 112 of the motor 110, and surrounds the outer periphery of the aforementioned electronic components, not shown. Further, the pipe 130 is connected to the cooling water passage 120. Thus, a coolant such as cooling water can flow into the cooling water passage 120 from the inlet 122 of the cooling water passage 120 through the pipe 130, and circulate around the motor 110 to absorb heat energy generated during operation of the motor 110, and the cooling water having been heated up flows out from the outlet 124 of the cooling water passage 120 through the pipe 130 to cool the motor 110.
In detail, in the present embodiment, the inlet 122 and the outlet 124 of the cooling water passage 120 are disposed above the housing 112 of the motor 110. The pipe 130 may be formed by connecting a plurality of stages of relatively hard forming pipes (pipe) and a plurality of stages of relatively soft hoses (hose), so that the pipe can pass through a space between components inside the vehicle 10 according to the arrangement inside the vehicle 10, and be fixed to the internal structure of the vehicle 10 via a not-shown fastener. Clamps 132 and 134 may be provided at the inlet 122 and the outlet 124 to fix the ends of the pipe 130 to the inlet 122 and the outlet 124. However, the present invention is not limited to the fixing manner of the pipe 130 at the inlet 122 and the outlet 124, and the fixing manner can be adjusted according to the requirement.
Further, in the present embodiment, the pipe 130 is connected from the power drive unit 12 to the inlet 122, and from the outlet 124 to the radiator 18. Therefore, the piping 130 is arranged as follows: the cooling water in the pipe 130 passes through the power drive unit 12, flows into the cooling water passage 120 from the inlet 122, and flows around the motor 110 through the cooling water passage 120 for one revolution, and then flows to the radiator 18 from the outlet 124. As can be seen from this, after the power drive unit 12 is cooled by a refrigerant such as cooling water in the pipe 130, the cooling water in the pipe 130 can flow into the cooling water passage 120 from the inlet 122 of the cooling water passage 120 through the pipe 130, and can surround the motor 110 by one cycle to absorb heat energy generated during the operation of the motor 110, and the cooling water having a raised temperature flows out from the outlet 124 of the cooling water passage 120 through the pipe 130 to further cool the motor 110. Subsequently, the heated cooling water flows to the radiator 18 via the pipe 130 to dissipate heat, and flows to the power drive unit 12 and the motor 110 via the pipe 130 again to be cooled.
In the present embodiment, the pipe diameter of the section 130a of the pipe 130 connected to the inlet 122 is smaller than the pipe diameters of the other sections of the pipe 130, and the sectional area of the section 130a of the pipe 130 connected to the inlet 122 is smaller than the sectional area of the cooling water passage 120. Preferably, the section 130a of the pipe 130 connected to the inlet 122 is the narrowest part of the entire cooling circuit (including the pipe 130 and the cooling water passage 120). For example, most of the sections of the pipe 130 have substantially the same pipe diameter, but the pipe is contracted in the section 130a of the pipe 130 connected to the inlet 122, that is, the pipe diameter of the section 130a of the pipe 130 connected to the inlet 122 is set to be smaller than the pipe diameters of the other sections of the pipe 130. Further, a cross-sectional area of a section 130a of the pipe 130 connected to the inlet 122 (for example, 130 square millimeters (mm)2) Is smaller than the sectional area (e.g., 280 square millimeters) of the cooling water passage 120. In this way, in the process in which the cooling water in the pipe 130 flows into the cooling water passage 120 after passing through the power drive unit 12, the flow velocity (for example, 0.7 m/s) of the section 130a of the pipe 130 connected to the inlet 122 is larger than the flow velocity (for example, 0.3 m/s) of the cooling water passage 120, and it is advantageous for the cooling water in the pipe 130 to enter the cooling water passage 120 from the inlet 122 provided above the housing 112. However, the above description is only for illustration, and the present invention is not limited thereto.
In addition, in the present embodiment, the vehicle 10 is further provided with a water tank 20 and a pump 22. The tank 20 is, for example, an expansion tank (expansion tank) and is provided on the upstream side of the power drive unit 12 in connection with a pipe 130, the pump 22 is, for example, an electric water pump (electric water pumps) and is provided between the motor 110 and the radiator 18, and the pipe 130 is connected from the outlet 124 of the cooling water passage 120 of the motor 110 to the pump 22 and is connected from the pump 22 to the power drive unit 12 via the radiator 18. Therefore, in the initial state, the cooling water can be injected into the pipe 130 from the water tank 20 by gravity, and then the cooling water in the pipe 130 cools the power drive unit 12 and enters the motor cooling structure 100 to cool the motor 110. Further, the cooling water flowing out of the outlet 124 provided above the housing 112 can be driven by the pump 22 to flow again to the power drive unit 12 while flowing down to the radiator 18 via the pipe 130, and the circulation of the cooling water can be made smoother.
Further, in the present embodiment, the cooling water is accompanied by air remaining in the process of flowing through the pipe 130 and the cooling water passage 120. After the cooling water is injected into the pipe 130 by gravity in the initial state, the cooling water is driven by the pump 22 to start circulation. At this time, since the initial speed of pushing out the air by driving the pump 22 becomes faster than the speed when the air is retained in the cooling water passage 120, the air retained in the pipe 130 can be smoothly discharged beyond the lowest point of the cooling water passage 120. In this way, after the cooling water is injected into the pipe 130 by gravity in the initial state, the cooling water is driven by the pump 22 to perform the water injection operation twice or more, thereby discharging the air remaining in the cooling circuit (including the pipe 130 and the cooling water passage 120). However, the present invention does not limit the type and position of the water tank 20 and the pump 22, the arrangement of the water tank 20 and the pump 22, and the number of times of water injection, which can be adjusted according to the requirement.
In the present embodiment, the engine 14 and the transmission 16 are connected via the bypass passage 140, and the bypass passage 140 is further provided in the housing 112 of the motor 110. Specifically, the engine 14 and the transmission 16 are provided on both front and rear sides (i.e., the front surface F and the rear surface R in fig. 2 and 3) of the motor 110, and the engine 14 and the transmission 16 can be cooled by introducing a coolant such as cooling water through the bypass passage 140 and another pipe 150. Furthermore, since the bypass path 140 is provided to penetrate from the front surface F of the housing 112 to the upper side of the housing 112 and to be close to the rear surface R, the inlet 142 and the outlet 144 of the bypass path 140 are provided to the front surface F of the housing 112 of the motor 110 and to the upper side of the housing 112 and to be close to the rear surface R, and the clamps 152 and 154 may be provided to the inlet 142 and the outlet 144 to fix the ends of the pipe 150 to the inlet 142 and the outlet 144, but the present invention is not limited thereto.
More specifically, as shown in fig. 4, in the cross section taken along line a-a of fig. 2 and 3, the inlet 122 of the cooling water passage 120 is disposed above the housing 112, and the cooling water passage 120 extends from the bottom of the inlet 122 to one side of the housing 112 (the extension is not shown in the cross section of fig. 4, as shown in fig. 2 and 3). In contrast, the inlet 142 of the bypass passage 140 is disposed on the front surface F of the housing 112, and the bypass passage 140 extends from the bottom of the inlet 142 to one side of the housing 112 (the extension is shown in fig. 2 and 3, but not shown in the cross-section of fig. 4). Therefore, in the cross section of fig. 4, the structure of the cooling water passage 120 in the vicinity of the inlet 122 and the structure of the bypass passage 140 in the vicinity of the inlet 142 do not interfere with each other, that is, the cooling water passage 120 and the bypass passage 140 do not communicate with each other.
Further, as shown in fig. 5, in the cross section taken along line B-B in fig. 2 and 3, the outlet 124 of the cooling water passage 120 is disposed above the housing 112, and the cooling water passage 120 extends from the bottom of the outlet 124 to the other side of the housing 112 (the extension is not shown in the cross section of fig. 5, as shown in fig. 2 and 3). In contrast, the bypass passage 140 is not shown in the cross-section of fig. 5. Therefore, in the cross section of fig. 5, the structure of the cooling water passage 120 near the outlet 124 and the structure of the bypass passage 140 do not interfere with each other, that is, the cooling water passage 120 and the bypass passage 140 do not communicate with each other.
Further, as shown in fig. 6, the cooling water passage 120 is provided in the housing 112 and surrounds the outer periphery of the motor 110 in the cross section taken along line C-C of fig. 2 and 3 (shown on the lower side in the cross section of fig. 6 as shown in fig. 2 and 3). In contrast, the outlet 144 of the bypass passage 140 is disposed above the housing 112 near the rear surface R, and the bypass passage 140 extends from the bottom of the outlet 144 to the other side of the housing 112 (the extension is shown in fig. 2 and 3, but not shown in the cross-section of fig. 6). Therefore, in the cross section of fig. 6, the structure of the cooling water passage 120 and the structure of the bypass passage 140 near the outlet 144 do not interfere with each other, that is, the cooling water passage 120 and the bypass passage 140 do not communicate with each other.
As shown in fig. 7, the cooling water passage 120 is provided in the housing 112 and surrounds the outer periphery of the motor 110 in the cross section taken along line D-D in fig. 2 and 3 (shown on the lower side in the cross section of fig. 7 in fig. 2 and 3). In contrast, the inlet 142 of the bypass passage 140 is disposed on the front surface F of the housing 112, the outlet 144 of the bypass passage 140 is disposed above the housing 112 near the rear surface R (as shown in fig. 2 and 3, a circular hole representing the bottom is shown in the cross section of fig. 7), and the bypass passage 140 extends obliquely from the inlet 142 to the outlet 144. Therefore, in the cross section of fig. 7, the structure of the cooling water passage 120 and the structure of the bypass passage 140 do not interfere with each other, that is, the cooling water passage 120 and the bypass passage 140 do not communicate with each other.
As can be seen, in the motor cooling structure 100 of the present embodiment, the cooling water passage 120 and the bypass passage 140 are provided adjacent to each other in the housing 112 of the motor 110 but do not communicate with each other. In this way, the motor 110 can be cooled by introducing the cooling water flowing through the power drive unit 12 through the pipe 130 and the cooling water passage 120, and also by introducing the cooling water flowing through the engine 14 through the pipe 150 and the bypass passage 140. The cooling water passage 120 surrounds the motor 110 for one circle, and introduces the cooling water having a relatively low temperature after flowing through the power drive unit 12 to cool the motor 110 mainly, while the bypass passage 140 penetrates from the front surface F of the casing 112 to the upper side of the casing 112 near the rear surface R and introduces the cooling water having a relatively high temperature after flowing through the engine 14 to cool the motor 110 secondarily. The temperature is only a relative expression, and the cooling water flowing through the power drive unit 12 and the cooling water flowing through the engine 14 can still cool the motor 110 generating a high temperature during operation. Accordingly, the motor cooling structure 100 of the present embodiment can improve the cooling capacity of the motor 110.
However, in other embodiments not shown, even if the bypass passage 140 is not provided in the housing 112 of the motor 110 (that is, the motor is not further cooled by the cooling water having a higher temperature after passing through the engine via the bypass passage 140), as long as the motor 110 can be cooled by introducing the cooling water having a lower temperature after passing through the power drive unit 12 via the cooling water passage 120, the motor cooling structure provided with the cooling water passage 120 configured as described above can still improve the cooling capacity of the motor, compared to the prior art in which the motor is cooled only by the cooling water having a higher temperature after passing through the engine. Therefore, the present invention does not restrict whether the bypass passage is provided in the housing of the motor, nor does it restrict whether the bypass passage is provided (the cooling structure between the engine and the transmission can be realized via other cooling circuits, not shown), which can be adjusted as required.
In summary, in the motor cooling structure of the present invention, the motor is cooled by the cooling water flowing through the power drive unit, wherein the inlet and the outlet of the cooling water passage are provided above the housing of the motor, and further the pipe diameter of the section of the connection inlet of the piping is set to be smaller than the pipe diameters of the other sections of the piping, and the sectional area of the section of the connection inlet of the piping is set to be smaller than the sectional area of the cooling water passage. In this way, compared to a method of cooling the motor with the cooling water after flowing through the engine, the cooling water after flowing through the power drive unit has a lower temperature, and the motor can be cooled efficiently, and the configuration of the pipe in the vicinity of the inlet enables the cooling water in the pipe to flow more smoothly into the cooling water passage to cool the motor. In addition, a bypass passage for introducing cooling water into the engine and the transmission can be further arranged on the shell of the motor according to requirements, and then the motor is cooled in an auxiliary manner. Therefore, the utility model discloses a motor cooling structure can promote the cooling capacity of motor.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the embodiments of the present invention, and the essence of the corresponding technical solutions is not disclosed.
Claims (4)
1. A motor cooling structure, characterized by comprising:
a motor;
a cooling water passage provided in a housing of the motor; and
a pipe connected to the cooling water passage, wherein,
the inlet and outlet of the cooling water passage are disposed above the housing of the motor,
the piping is connected from the power drive unit to the inlet and from the outlet to the radiator,
the piping is configured to: the cooling water in the pipe passes through the power drive unit and then flows into the cooling water passage from the inlet and flows to the radiator from the outlet,
the pipe diameter of the section of the piping connected to the inlet is smaller than the pipe diameter of the other sections of the piping, and
the cross-sectional area of the section of the pipe connecting the inlet is smaller than the cross-sectional area of the cooling water passage.
2. The motor cooling structure according to claim 1, wherein the motor is disposed in a manner sandwiched between an engine and a transmission.
3. The motor cooling structure according to claim 1, wherein an engine and a transmission are connected via a bypass passage provided in a housing of the motor.
4. The motor cooling structure according to claim 1, wherein a pump is provided between the motor and the radiator, and the piping is connected from the outlet of the cooling water passage to the pump and from the pump to the power drive unit via the radiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922310065.7U CN211280625U (en) | 2019-12-20 | 2019-12-20 | Motor cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922310065.7U CN211280625U (en) | 2019-12-20 | 2019-12-20 | Motor cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211280625U true CN211280625U (en) | 2020-08-18 |
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ID=72012157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922310065.7U Active CN211280625U (en) | 2019-12-20 | 2019-12-20 | Motor cooling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211280625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177519A (en) * | 2020-10-14 | 2021-01-05 | 安徽腾兴工程设备制造有限公司 | Hydraulic motor cooling device for suspended excavation equipment |
-
2019
- 2019-12-20 CN CN201922310065.7U patent/CN211280625U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177519A (en) * | 2020-10-14 | 2021-01-05 | 安徽腾兴工程设备制造有限公司 | Hydraulic motor cooling device for suspended excavation equipment |
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