CN111740532B - New energy powertrain cooling structure - Google Patents
New energy powertrain cooling structure Download PDFInfo
- Publication number
- CN111740532B CN111740532B CN202010754244.4A CN202010754244A CN111740532B CN 111740532 B CN111740532 B CN 111740532B CN 202010754244 A CN202010754244 A CN 202010754244A CN 111740532 B CN111740532 B CN 111740532B
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- CN
- China
- Prior art keywords
- cooling
- groove
- cooling jacket
- jacket
- channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000001816 cooling Methods 0.000 title claims abstract description 135
- 238000004891 communication Methods 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims description 33
- 230000017525 heat dissipation Effects 0.000 claims description 24
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000002826 coolant Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 238000012546 transfer Methods 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 206010002368 Anger Diseases 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
- F16H57/0416—Air cooling or ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a new energy power assembly cooling structure, wherein one end of a first middle communicating part is communicated with a first groove, one end of a second middle communicating part is communicated with a second groove, a third groove which is provided with an inlet and an outlet and is in a labyrinth structure is arranged on the axial end face of an inner cooling jacket facing the shared part, the other end of the first middle communicating part is communicated with the inlet of the third groove, the other end of the second middle communicating part is communicated with the outlet of the third groove, after the inner cooling jacket is matched with an outer cooling jacket, the first groove is combined with the inner wall surface of the inner cooling jacket to form an input cooling channel, after the second groove is combined with the inner wall surface of the inner cooling jacket to form an output cooling channel, after the inner cooling jacket is matched with the shared part, the middle communicating part is combined with the inner wall surface of the inner cooling jacket to form a cooling communication channel for connecting the shared part cooling channel with the input cooling channel and the output cooling channel. The invention has the advantage of improving the cooling efficiency.
Description
Technical Field
The invention relates to the technical field of automobile transmissions, in particular to a cooling structure of a new energy power assembly.
Background
The new energy power assembly is a development trend of the future automobile industry. In a hybrid product of a motor, a controller and a speed reducer, and a three-in-one pure electric system of the motor, the speed reducer and the controller, both the motor and the speed reducer (or the speed reducer) have heating phenomena, and a system heat dissipation structure has great influence on motor performance and speed reducer lubrication.
In the existing common power system structure, the problems that the heat productivity of a clutch is large at a transmission end, the oil temperature of the transmission is high, an oil cooler is required to be additionally arranged outside to cool lubricating oil, and the overall cost is high exist.
To solve the above problems, a common transmission oil cooling solution is a charge cooler.
Disclosure of Invention
The invention provides a new energy power assembly cooling structure capable of improving cooling efficiency.
The technical scheme for achieving the purpose is as follows:
The cooling structure of the new energy power assembly comprises a transmission shell and a motor shell, wherein a shared part is formed between the transmission shell and the motor shell after one end of the transmission shell is connected with one end of the motor shell, the motor shell comprises an outer cooling jacket and an inner cooling jacket positioned in an inner cavity of the outer cooling jacket, a first groove and a second groove are formed in the outer peripheral surface of the inner cooling jacket, an intermediate communication part is further arranged on the outer peripheral surface of the inner cooling jacket, the intermediate communication part comprises a first intermediate communication part and a second intermediate communication part, one end of the first intermediate communication part is communicated with the first groove, and one end of the second intermediate communication part is communicated with the second groove;
The inner cooling jacket is provided with a third groove which is provided with an inlet and an outlet and has a labyrinth structure on the axial end face of the sharing part, the other end of the first middle communicating part is communicated with the inlet of the third groove, and the other end of the second middle communicating part is communicated with the outlet of the third groove;
After the inner cooling jacket is matched with the outer cooling jacket, the first groove is combined with the inner wall surface of the inner cooling jacket to form an input cooling channel, the second groove is combined with the inner wall surface of the inner cooling jacket to form an output cooling channel, the inner cooling jacket is matched with the shared part to form a shared part cooling channel, and the middle communication part is combined with the inner wall surface of the inner cooling jacket to form a cooling communication channel for connecting the shared part cooling channel with the input cooling channel and the output cooling channel.
The invention has the following advantages:
1. The invention forms the channels for the cooling medium to flow through at the common part between the motor shell and the transmission shell, and the channels are communicated, so the invention can take away the heat on the motor and a part of the transmission at the same time, and the overall heat dissipation performance of the power assembly is improved.
2. The cooling structure is arranged into a double-channel structure, so that the cooling medium area is increased while the heat dissipation contact area is increased, and the heat dissipation capacity of the motor is enhanced. The better the heat dissipation capability is, the power-down working condition can not occur when the motor runs at peak value.
3. The heat dissipation rib plate enhances the heat dissipation capacity of the transmission end, and when the heat of the transmission taken away by the motor cooling system and the transmission heat dissipation rib plate is enough, an oil cooler of the transmission can be even canceled, so that the cost is saved.
In summary, compared with the prior art, the heat dissipation capacity of the power assembly is enhanced by increasing the heat dissipation contact area and the cooling liquid area.
Drawings
Fig. 1 is a cross-sectional view of a new energy power assembly cooling structure.
FIG. 2 is a schematic illustration of the combination of an inner jacket and a transmission housing.
FIG. 3 is a schematic view of the external structure of the inner jacket.
FIG. 4 is a cross-sectional view of the inner jacket;
Fig. 5 is a left side view of fig. 3.
Fig. 6 is a side view of fig. 1.
Fig. 7 is a schematic view of a heat dissipating web.
1 Is a transmission shell, 2 is a shared part, 3 is an outer cooling jacket, 4 is an inner cooling jacket, 5 is a first groove, 6 is a second groove, 7 is a third groove, 7a is an inlet, 7B is an outlet, 8 is a heat dissipation rib plate, 9 is an oil collecting groove, 10 is a bearing hole end face, 11 is a rear end cover box face, A is an input cooling channel, B is an output cooling channel, C is a shared part cooling channel, and D is a cooling communication channel.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 7.
The invention relates to a new energy power assembly cooling structure, which comprises a transmission shell 1 and a motor shell, wherein after one end of the transmission shell 1 is connected with one end of the motor shell, a shared part 2 is formed between the transmission shell 1 and the motor shell, and the motor shell comprises an outer cooling jacket 3 and an inner cooling jacket 4 positioned in an inner cavity of the outer cooling jacket 3.
The outer peripheral surface of the inner cooling jacket 4 is provided with a first groove 5 and a second groove 6, the outer peripheral surface of the inner cooling jacket 4 is also provided with an intermediate communication part, the intermediate communication part comprises a first intermediate communication part and a second intermediate communication part, one end of the first intermediate communication part is communicated with the first groove 5, and one end of the second intermediate communication part is communicated with the second groove 6.
The inner cooling jacket 4 is provided with a third groove 7 which is provided with an inlet 7a and an outlet 7b and has a labyrinth structure on the axial end face facing the shared portion 2, the other end of the first intermediate communication portion is communicated with the inlet 7a of the third groove 7, and the other end of the second intermediate communication portion is communicated with the outlet 7b of the third groove 7.
After the inner cooling jacket 4 is matched with the outer cooling jacket 3, the first groove 5 is combined with the inner wall surface of the inner cooling jacket 4 to form an input cooling channel A, the second groove 6 is combined with the inner wall surface of the inner cooling jacket 4 to form an output cooling channel B, the inner cooling jacket 4 is matched with the shared part 2 to form a shared part cooling channel C, and the middle communicating part is combined with the inner wall surface of the inner cooling jacket 4 to form a cooling communicating channel D for connecting the shared part cooling channel C with the input cooling channel A and the output cooling channel B.
The input cooling passage a, the output cooling passage B, and the cooling communication passage D cool the structure (e.g., stator) inside the motor, respectively, while the common portion cooling passage C cools the structure (e.g., bearing supporting the rotor) inside the motor, and the heat on the transmission case 1 can be taken away, so that the cooling structure formed by the input cooling passage a, the output cooling passage B, the cooling communication passage D, and the common portion cooling passage C can cool the motor and the transmission, respectively, thereby improving the cooling efficiency of the new energy power assembly. In addition, the cooling structure is a dual-channel structure, that is, both on the motor housing and at the shared portion 2, there are input and output channels of the cooling medium, and obviously, the dual-channel structure can further improve the cooling efficiency, so that the heat dissipation efficiency of the new energy power assembly is improved.
The outer cooling jacket 3 is integrally formed with the transmission housing 1, and the inner cooling jacket 4 is welded with the transmission housing 1. The cast inner cooling jacket 4 is arranged in the outer cooling jacket 3, and the positions of the bearing hole end face 10 and the positions of the outer cooling jacket 3 and the rear end cover box face 11 are respectively sealed by friction stir welding or sealed by sealing rings. After the two are assembled, the inner diameter of the inner cooling jacket 4, the bearing hole and other positions are processed.
The first grooves 5 and the second grooves 6 are alternately spirally wound on the outer peripheral surface of the inner jacket 4, and the input cooling passage a and the output cooling passage B are both spiral passages. The areas of the first grooves 5 and the second grooves 6 for cooling medium to flow are the same, namely the first grooves 5 and the second grooves 6 have the same size, namely the spiral length, the screw pitch P and the water channel section length a and the water channel section width b of the first grooves 5 and the second grooves 6 are the same. The invention adopts the double-channel structure to increase the number of the cooling channels, and the heat dissipation area is increased compared with that of a single-channel water channel.
The novel transmission comprises a transmission shell 1, and is characterized by further comprising a heat dissipation rib plate 8 arranged in the transmission shell 1, wherein an oil collecting groove 9 is arranged on the heat dissipation rib plate 8. During processing, the heat dissipation rib plate 8 is punched and formed by a punching process, and the heat dissipation rib plate are welded together after the transmission shell 1 is cast. Or the heat dissipation rib plates 8 are punched and formed firstly, and the punched heat dissipation rib plates 8 are put into a die to cast the two into a whole when the transmission shell 1 is cast.
The new energy power assembly cooling structure of the invention aims at increasing the thermal contact area and the cooling liquid area to enhance the heat dissipation capacity. The heat flux density calculation formula is q=Φ/X, wherein Φ is the heat flux and X is the cross-sectional area in the heat conduction direction.
When the cooling medium passes through the cooling structure formed by the input cooling channel A, the cooling communication channel D, the common part cooling channel C and the output cooling channel B, the calculation formula of the heat removal capacity is P=h×Y×Deltat, wherein h is a heat transfer coefficient, Y is the area of the cooling medium flowing in the cooling circuit, and Deltat is the temperature difference between water and a pipeline.
The heat transfer coefficient calculation formula is h=nu×α/De, where α is the coolant heat transfer coefficient, nu is the number of angers and De is the equivalent diameter. The equivalent diameter calculation formula is de=4×y/u= (4 ab)/[ 2× (a+b) ], where a and B are the length and width of the input cooling passage a, the cooling communication passage D, the common portion cooling passage C, and the output cooling passage B, respectively. U is the wet circumference of the water channel. The calculation formula of the number of the anger Sier isWhere Re is the Reynolds number, pr is the Planet number, ɛ r is the spiral pipe correction coefficient.
For the power assembly with the same volume, when the flow rate of the cooling medium entering the cooling structure is 8L/min, the heat quantity which can be taken away by the cooling structure in the invention is 4813W according to the calculation formula, and the heat quantity which can be taken away by the cooling structure which is not prolonged to the bottom (namely has no shared part cooling channel C) and has the same single channel such as the spiral length, the screw pitch and the like is 3244W. According to calculation, the cooling structure of the new energy power assembly has the advantages of increasing the area of the cooling medium and increasing the heat dissipation area so as to enhance the heat dissipation capacity.
It should be noted that the above embodiments are merely preferred embodiments of the present invention for illustrating the technical solution of the present invention, and not limiting the scope of the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention, and in addition, the technical solution of the present invention is directly or indirectly applied to other related technical fields, which are all included in the scope of the patent protection of the present invention.
Claims (4)
1. The novel energy power assembly cooling structure comprises a transmission shell (1) and a motor shell, wherein after one end of the transmission shell (1) is connected with one end of the motor shell, a shared part (2) is formed between the transmission shell (1) and the motor shell, the motor shell comprises an outer cooling jacket (3) and an inner cooling jacket (4) positioned in an inner cavity of the outer cooling jacket (3), and the novel energy power assembly cooling structure is characterized in that a first groove (5) and a second groove (6) are formed in the outer peripheral surface of the inner cooling jacket (4), an intermediate communication part is further arranged on the outer peripheral surface of the inner cooling jacket (4), the intermediate communication part comprises a first intermediate communication part and a second intermediate communication part, one end of the first intermediate communication part is communicated with the first groove (5), and one end of the second intermediate communication part is communicated with the second groove (6);
A third groove (7) which is provided with an inlet (7 a) and an outlet (7 b) and has a labyrinth structure is arranged on the axial end surface of the inner cooling jacket (4) facing the shared part (2), the other end of the first middle communicating part is communicated with the inlet (7 a) of the third groove (7), and the other end of the second middle communicating part is communicated with the outlet (7 b) of the third groove (7);
After the inner cooling jacket (4) is matched with the outer cooling jacket (3), the first groove (5) is combined with the inner wall surface of the inner cooling jacket (4) to form an input cooling channel (A), the second groove (6) is combined with the inner wall surface of the inner cooling jacket (4) to form an output cooling channel (B), the inner cooling jacket (4) is matched with the shared part (2) to form a shared part cooling channel (C), and the middle communicating part is combined with the inner wall surface of the inner cooling jacket (4) to form a cooling communicating channel (D) for connecting the shared part cooling channel (C) with the input cooling channel (A) and the output cooling channel (B).
2. The new energy power assembly cooling structure according to claim 1, wherein the first grooves (5) and the second grooves (6) are alternately spirally wound on the outer peripheral surface of the inner jacket (4), and the input cooling passage (a) and the output cooling passage (B) are both spiral passages.
3. The new energy power assembly cooling structure according to claim 1, characterized in that the outer cooling jacket (3) is integrally formed with the transmission housing (1), and the inner cooling jacket (4) is welded with the transmission housing (1).
4. A new energy power assembly cooling structure according to any one of claims 1 to 3, further comprising a heat dissipation rib plate (8) arranged inside the transmission housing (1), wherein the heat dissipation rib plate (8) is provided with an oil collecting groove (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010754244.4A CN111740532B (en) | 2020-07-30 | 2020-07-30 | New energy powertrain cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010754244.4A CN111740532B (en) | 2020-07-30 | 2020-07-30 | New energy powertrain cooling structure |
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| Publication Number | Publication Date |
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| CN111740532A CN111740532A (en) | 2020-10-02 |
| CN111740532B true CN111740532B (en) | 2025-02-28 |
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| WO2021229697A1 (en) * | 2020-05-12 | 2021-11-18 | 日産自動車株式会社 | Drive device |
| CN114458751B (en) * | 2022-01-27 | 2023-08-18 | 大连华锐重工集团股份有限公司 | Cooling system for main driving speed reducer of shield tunneling machine |
| CN115974383A (en) * | 2022-12-30 | 2023-04-18 | 宁夏鑫晶新材料科技有限公司 | Quartz crucible preparation facilities |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212811449U (en) * | 2020-07-30 | 2021-03-26 | 重庆青山工业有限责任公司 | New forms of energy power assembly cooling structure |
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| CN202591628U (en) * | 2012-05-21 | 2012-12-12 | 慈溪市贝利轴承有限公司 | Energy-saving electric main shaft |
| JP2015229990A (en) * | 2014-06-06 | 2015-12-21 | 日本精工株式会社 | Fluid device |
| WO2020044882A1 (en) * | 2018-08-29 | 2020-03-05 | パナソニック株式会社 | Semiconductor laser device |
| CN209616870U (en) * | 2019-01-16 | 2019-11-12 | 海马汽车有限公司 | A kind of water jacket shell and hybrid power mechanical-electric coupling assembly |
| CN110233545B (en) * | 2019-06-21 | 2024-02-02 | 扬州大学 | Cooling and radiating device for multi-stator motor |
| CN110445306B (en) * | 2019-08-24 | 2024-11-01 | 中船重工电机科技股份有限公司 | High-efficiency water-cooling heat dissipation structure of high-power density high-protection-level permanent magnet motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212811449U (en) * | 2020-07-30 | 2021-03-26 | 重庆青山工业有限责任公司 | New forms of energy power assembly cooling structure |
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