CN105082980B - Forced air cooling mechanism, hub driving unit and electric automobile - Google Patents
Forced air cooling mechanism, hub driving unit and electric automobile Download PDFInfo
- Publication number
- CN105082980B CN105082980B CN201410162918.6A CN201410162918A CN105082980B CN 105082980 B CN105082980 B CN 105082980B CN 201410162918 A CN201410162918 A CN 201410162918A CN 105082980 B CN105082980 B CN 105082980B
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- Prior art keywords
- compressed air
- drive unit
- wheel hub
- forced air
- air cooling
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- 238000001816 cooling Methods 0.000 title claims abstract description 53
- 230000000694 effects Effects 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000002826 coolant Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 241000239290 Araneae Species 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Motor Or Generator Cooling System (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Abstract
The invention provides a forced air cooling mechanism, a hub driving unit and an electric automobile. The mechanism comprises a hollow main body and a cover plate, wherein the main body is connected with the cover plate at one end along the axial direction, the other end of the main body is arranged on the outer part of a shell of a driving unit, a compressed air flow channel is arranged in the main body, a compressed air chamber is limited by the main body and the cover plate, a protruding part with a curved protruding surface for guiding air flow is arranged on the circumferential surface of the main body near the other end, a gap leading to the outside is limited between the protruding part and the cover plate, and the compressed air chamber is communicated with the gap and the compressed air flow channel. The driving unit comprises the mechanism, and the cover plate and the hub form an annular bell-mouth cavity to guide more air to flow into the periphery. The electric automobile comprises the drive unit. According to the invention, the cooling capacity of the drive unit is significantly increased. The power/torque density of the entire system can be brought to a high level without any increase in weight and cost compared to a drive unit employing a liquid cooling system.
Description
Technical field
The present invention relates to automotive fields, relate more specifically to electric car, especially various electric cars, such as mixing is dynamic
Power automobile (HEV), pure electric automobile (BEV) etc..In a first aspect, the present invention provides a kind of forced air cooling body, it is used for
The Wheel hub drive unit of electric car.In second aspect, the present invention provides a kind of Wheel hub drive unit.In the third aspect, this hair
It is bright that a kind of electric car is provided.
Background technique
It is known that generally use liquid-cooling system electronic to cool down for the closed Wheel hub drive unit of electric car
Machine, this is because needing to result in what motor generated for high wheel driving torque during driving electric car
Heat is too many, and concentric enclosure space is formed between wheel hub and the shell of Wheel hub drive unit, can not be cooling by air
To take away enough heats.
Fluid cooling system currently used for Wheel hub drive unit needs many additional components, such as coolant jacket, sealing
Part, fluid flow conduit etc., which increase design/component layouts complexities of Wheel hub drive unit.Finally, this cause compared with
High production cost and longer development time.
Moreover, additional component and the weight of entire hub drive system is also added for cooling fluid media (medium), this
It influences vehicle performance and reduces the power/torque density of vehicle.
In addition, the installation and maintenance of fluid cooling system are complex and difficult, durable ability needs very young
It carefully is checked, but also increases the cost of maintenance.
Summary of the invention
The purpose of the present invention is overcome the disadvantages mentioned above of the Wheel hub drive unit with liquid-cooling system at present.For this purpose,
The present invention provides a kind of Wheel hub drive unit, and with forced air air-circulation features, this feature is independent in the form of simple mechanism
In on the outside for the shell that other components of Wheel hub drive unit are mounted on Wheel hub drive unit, to realize that forced air is cooling.
According to a first aspect of the present invention, forced air cooling body includes hollow main body and cover board, and the main body is along axis
To connecting at one end with the cover board, the other end can be mounted on the outside of the shell of the Wheel hub drive unit, described
It is equipped with compressed air in main body and flows channel, the main body and the cover board limit compressed air chamber, and the main body is in energy
The axial surface for being enough mounted on the adjacent one end on the shell of Wheel hub drive unit is equipped with protrusion, and the protrusion has curved
The bent protrusion surface for air-flow guiding, and extraneous gap is defined an access between the protrusion and the cover board, it is described
Compressed air chamber is connected to the gap and compressed air flowing channel.Using gap, by the compressed air stream of input
Become jet stream, and using the protrusion surface on the protrusion of main body, jet stream is made to be attached in protrusion surface and move along the surface
It is dynamic, while surrounding air being involved in the enclosure space formed between wheel hub and the shell of Wheel hub drive unit.By this method, energy
The effect of enough compressed air streams for obtaining enhancing.
Preferably, main body is hermetically connect with cover board by sealing element.
According to an embodiment of the invention, the main body is made of metal.The air pressure compressed air higher than surrounding air can be with
By the pump/compressor or compressed air cylinder offer outside the Wheel hub drive unit on automobile or by Wheel hub drive unit itself
Pump/compressor provides.
According to an embodiment of the invention, the compressed air chamber is connect with compressed air flowing channel by entrance
Portion's connection, the entrance interconnecting piece have the pass through openings for connection.By this method, it is empty to form a compressed air aggregation
Between, to promote to form jet stream.
According to an embodiment of the invention, the forced air cooling body further includes conduit, with the entrance interconnecting piece
It is connected, compressed air is imported into the compressed air chamber from compressed air flowing channel.
According to an embodiment of the invention, the gap is annular, width can be as small as 0.05mm.
According to an embodiment of the invention, the main body is connected through a screw thread on the outside for being mounted on the shell.
According to an embodiment of the invention, protrusion surface carries out air-flow guiding by Coanda effect.
According to a second aspect of the present invention, Wheel hub drive unit includes motor, radiating ribs and shell, and the motor is pacified
In the shell, the radiating ribs are mounted on the motor, and radiated rib is provided in the radiating ribs, special
Sign is that Wheel hub drive unit further includes above-mentioned forced air cooling body, is separately attached on the outside of shell, is made
Compressed air is directed to and flows to radiated rib after reinforcing by entrainment phenomena.By this method, forced air cooling body can be with
It is easily mounted in the shell exterior of Wheel hub drive unit as individual additional component, installation and maintenance are all simpler
Single, cost is relatively low.
According to an embodiment of the invention, the wheel hub of the cover board of the forced air cooling body and the Wheel hub drive unit
Cyclic annular horn mouth cavity is formed, inhales more surrounding airs inflows to roll up.
According to an embodiment of the invention, Wheel hub drive unit further includes retarder, mechanical brake, sealing element and support shaft
It holds.
According to an embodiment of the invention, the radiated rib is along axial parallel arrangement.By this method, guarantee radiated rib
Extending direction is consistent with airflow direction, to promote to cool down.
According to an embodiment of the invention, the pressure cooling body is axially mounted on the outside of the shell, with institute
Radiating ribs are stated to flush.
According to a third aspect of the present invention, electric car includes above-mentioned Wheel hub drive unit.
It is being provided by external compressed air source or by the external gas in automobile idea of the invention is that using compressor
The compressed air of pumping is from the outside of Wheel hub drive unit along the compressed air flowing channel of forced air cooling body through strong
The entrance interconnecting piece of refrigeration but air mechanism enters gap.Since the air pressure of compressed air is higher than atmospheric pressure, compressed air meeting
It is flowed out in the form of high flow rate jet stream from the above-mentioned small―gap suture of forced air cooling body, then due to Coanda effect
(Coanda effect refers to such a phenomenon: when the surface that jet stream flows through is bent relative to initial jets direction, jet stream is inhaled
It is attached on a surface and keep along the surface flow), compressed air will along the protrusion surface of the protrusion of main body flow, in turn
Due to the entrainment phenomena in hydrodynamics, a large amount of surrounding airs are involved in and be flowed together with compressed air jet by compressed air
Into enclosure space.Further, since surrounding air forms area of low pressure, and when compressed air jet flows out gap, surrounding air
It can also be automatically into enclosure space.Finally, compressed air and be involved in and automatically into surrounding air blow to be set to together
On the radiated rib of radiating ribs, thus cooling motor.
According to the present invention, due to bigger air flow rate, the cooling capacity of Wheel hub drive unit is improved significantly.
By the air quickly flowed, easily heat can be taken away from Wheel hub drive unit.Therefore, the function of whole system
Rate/torque density can reach high level, without the increase of any weight and cost.
Detailed description of the invention
Fig. 1 is the sectional view of the Wheel hub drive unit with forced air air-circulation features of embodiment according to the present invention；
Fig. 2 is the sectional view of the forced air cooling body of embodiment according to the present invention；
Fig. 2A is the partial enlarged view of forced air cooling body shown in Fig. 2；And
Fig. 3 is that the air of the Wheel hub drive unit with forced air air-circulation features of embodiment according to the present invention is banished
Big effect diagram.
Reference signs list
1 Wheel hub drive unit
1a wheel hub
2 motor
2.1 cooling jacket
2.2 motor stator
2.3 rotor
2.4 rotor field spider
3 mechanical brakes
3.1 brake stator
3.2 brake rotor
4 retarders
4.1 gear ring
4.2 planetary gear
4.3 planetary carrier
4.4 sun gear
5 connecting flanges
6 spring bearings
7 support shafts
8 heat insulating mattress
9 shells
10 bearing outer rings
11 connection bolts
12 sealing elements
13 spring bearings
14 forced air cooling bodies
14.1 main bodys
14.1a protrusion
The annular gap 14.1b
14.1c attachment screw
14.1d entrance interconnecting piece
14.2 cover boards
14.3 conduits
14.4 sealing elements
15 radiating ribs
16 surrounding airs
17 compressed airs
Specific embodiment
Specific embodiments of the present invention is described in detail with reference to the accompanying drawing.
Fig. 1 shows cutting for the Wheel hub drive unit 1 with forced air air-circulation features of embodiment according to the present invention
Face figure.Wheel hub drive unit 1 mainly includes wheel hub 1a (see Fig. 3), motor 2, mechanical brake 3, retarder 4, connecting flange
5, spring bearing 6, support shaft 7, heat insulating mattress 8, shell 9, bearing outer ring 10, connection bolt 11, sealing element 12, spring bearing 13,
With radiating ribs 15.Motor 2 includes cooling jacket 2.1, motor stator 2.2, rotor 2.3, rotor field spider 2.4, machinery system
Dynamic device 3 includes brake stator 3.1, and brake rotor 3.2, retarder 4 includes gear ring 4.1, planetary gear 4.2, planetary carrier
4.3, sun gear 4.4.The connection of above-mentioned component and positional relationship are all known in the art, therefore no further details to be given herein.
In this example, it is provided with radiated rib (not shown) in radiating ribs 15, along axial parallel arrangement.
In addition, as shown in Figure 1, Wheel hub drive unit 1 further includes forced air cooling body 14, along axial direction independently of wheel
Other components of hub driving unit 1 are mounted on the outside of shell 9, i.e., do not influence the installation of other components.The forced air
Cooling body 14 includes hollow metal master 14.1, cover board 14.2, conduit 14.3, sealing element 14.4, in metal master 14.1
It is formed with compressed air flowing channel (not shown).The global sections of forced air cooling body 14 are shown respectively in Fig. 2 and Fig. 2A
Figure and partial enlarged view.As shown in Figure 2 A, metal master 14.1 links together with cover board 14.2 at one end, and in order to seal with
Compressed air leakage is prevented, sealing element 14.4 is provided with, the other end is connected through a screw thread 14.1c and is mounted on the outside of shell 9,
It is flushed with radiating ribs 15 (see Fig. 1).In this example, the air pressure compressed air 17 (see Fig. 3) higher than surrounding air is by automobile
Pump/compressor or compressed air cylinder outside Wheel hub drive unit 1 are provided or by the pump/compressor on Wheel hub drive unit itself
It provides.
As shown in Figure 2 A, metal master 14.1 is equipped with protrusion 14.1a on the peripheral surface, is used for gas with curved
Conductance to protrusion surface, extraneous annular gap 14.1b, institute are defined an access between the protrusion 14.1a and cover board 14.2
Gap 14.1b is stated to be connected to compressed air flowing channel.In addition, metal master 14.1 be equipped with entrance interconnecting piece 14.1d, it is described enter
Mouth interconnecting piece 14.1d has pass through openings (not shown), and in entrance interconnecting piece 14.1d, protrusion 14.1a and the cover board
Compressed air chamber (not shown) is formed between 14.2, the gap 14.1b is through the pass through openings and compressed air chamber and pressure
Stream of compressed air moves channel connection.In this example, the width of gap 14.1b is 0.05mm.In addition, forced air cooling body 14 is also
Including conduit 14.3, it is connected with entrance interconnecting piece 14.1d, compressed air is imported into compression sky from compressed air flowing channel
Gas chamber, to guarantee that compressed air 17 (see Fig. 3) enters from the external of Wheel hub drive unit.
The Wheel hub drive unit with forced air air-circulation features of embodiment according to the present invention is described referring to Fig. 3
Air stream amplification effect.As shown in figure 3, due to the projecting air 16 of the air pressure of compressed air 17, compressed air 17 will be from
The small―gap suture 14.1b of forced air cooling body 14 is flowed out in the form of high flow rate jet stream, then due to Coanda effect, pressure
Contracting air 17 will be flowed along the protrusion surface of the protrusion 14.1a of metal master 14.1, and then due to the volume in hydrodynamics
A large amount of surrounding airs 16 are involved in and be flowed together with compressed air jet by suction phenomenon, compressed air 17.As shown in figure 3, strong
The wheel hub 1a of the cover board 14.2 of air cooling mechanism 14 processed and the Wheel hub drive unit 1 forms cyclic annular horn mouth cavity, thus
More surrounding airs are inhaled convenient for volume to flow into.It is also shown in FIG. 3, the shell 9 of wheel hub 1a and Wheel hub drive unit (and radiating ribs
15) concentric enclosure space is formed between.When entering in the enclosure space from right to left in air-flow such as figure, area of low pressure will go out
The right side of present enclosure space.Then, surrounding air 16 will automatically enter in enclosure space.By this method, final air
Jet stream will be more much bigger than initial compressed air stream.In this example, there are two types of the amplification effects of air-flow, one is inhaled now due to volume
As and so that surrounding air 16 is involved in enclosure space, another kind is the low pressure due to the right side of enclosure space and makes surrounding air 16
Automatically into enclosure space.
Wheel hub drive unit of the invention uses simple individually attached without traditional complicated fluid cooling system
The forced air cooling body added generates the air cooling effect of enhancing based on Coanda effect, can be by the compressed air of input
Up to 30 times of air-flow is arrived in stream enhancing, to cool down motor.According to the solution of the present invention, cooling capacity is increased, and is pacified
Dress and maintenance protection are easy simplicity, and the increase compared with current fluid cooling system in no apparent cost and weight.
The present invention is not limited to particular content described in above-mentioned specific embodiment.For example, reality according to the present invention
Example is applied, forced air cooling body 14 extends axially through threaded connection 14.1c and is installed on the outside of shell 9, with radiating ribs 15
It flushes.But forced air cooling body 14 can also be mounted on other positions on the outside of shell 9 by other connection types
Set place.
Claims (12)
1. a kind of forced air cooling body is used for Wheel hub drive unit, which is characterized in that the forced air cooling body packet
Hollow main body and cover board are included, the main body is connect with the cover board at one end along axial direction, and the other end can be mounted on the wheel
On the outside of the shell of hub driving unit, compressed air is equipped in the main body and flows channel, the main body and the cover board
Limit compressed air chamber, and the circumferential table of adjacent one end of the main body on the shell that can be mounted on Wheel hub drive unit
Face be equipped with protrusion, the protrusion have it is curved for air-flow guiding protrusion surface, and the protrusion with it is described
Extraneous gap, the compressed air chamber and the gap and compressed air flowing channel is defined an access between cover board to connect
Logical, the forced air cooling body makes compressed air be directed to and reinforce by entrainment phenomena.
2. forced air cooling body according to claim 1, which is characterized in that the compressed air chamber and the pressure
Stream of compressed air moves channel and is connected to by entrance interconnecting piece, and the entrance interconnecting piece has the pass through openings for connection.
3. forced air cooling body according to claim 2, which is characterized in that the forced air cooling body also wraps
Conduit is included, is connected with the entrance interconnecting piece, compressed air is imported into the compression from compressed air flowing channel
Air chamber.
4. forced air cooling body according to any one of claim 1-3, which is characterized in that the gap is ring
Shape.
5. forced air cooling body according to any one of claim 1-3, which is characterized in that the width in the gap
More than or equal to 0.05mm.
6. forced air cooling body according to any one of claim 1-3, which is characterized in that the main body passes through spiral shell
Line connection is mounted on the outside of the shell.
7. forced air cooling body according to any one of claim 1-3, which is characterized in that the protrusion surface is logical
It crosses Coanda effect and carries out air-flow guiding.
8. a kind of Wheel hub drive unit, including motor, radiating ribs and shell, the motor is installed in the shell,
The radiating ribs are mounted on the motor, are provided with radiated rib in the radiating ribs, which is characterized in that the wheel hub
Driving unit further includes forced air cooling body described in any one of -7 according to claim 1, is individually installed
On the outside of the shell, radiated rib is flowed to after so that compressed air is directed to and is reinforced by entrainment phenomena.
9. Wheel hub drive unit according to claim 8, which is characterized in that the cover board of the forced air cooling body with
The hub-shaped of the Wheel hub drive unit circlewise horn mouth cavity is inhaled more surrounding airs and is flowed into roll up.
10. Wheel hub drive unit according to claim 8, which is characterized in that the radiated rib is along axial parallel arrangement.
11. Wheel hub drive unit according to claim 8 or claim 9, which is characterized in that the forced air cooling body is along axis
To being mounted on the outside of the shell, flushed with coolant jacket.
12. a kind of electric car, which is characterized in that the electric car includes according to any one of claim 8-11
Wheel hub drive unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410162918.6A CN105082980B (en) | 2014-04-22 | 2014-04-22 | Forced air cooling mechanism, hub driving unit and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410162918.6A CN105082980B (en) | 2014-04-22 | 2014-04-22 | Forced air cooling mechanism, hub driving unit and electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105082980A CN105082980A (en) | 2015-11-25 |
| CN105082980B true CN105082980B (en) | 2019-09-20 |
Family
ID=54564642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410162918.6A Active CN105082980B (en) | 2014-04-22 | 2014-04-22 | Forced air cooling mechanism, hub driving unit and electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105082980B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300261A (en) * | 1998-05-11 | 2001-06-20 | 奥维尔·J·伯克斯特兰德 | Modular motorized electric wheel hub assembly for bicycles and the like |
| CN1754712A (en) * | 2004-09-28 | 2006-04-05 | 三洋电机株式会社 | Hub unit for use in electrically movable wheels and vehicle comprising the hub unit |
| CN101222159A (en) * | 2007-12-24 | 2008-07-16 | 湘潭电机股份有限公司 | Cooling rib direct driven permanent magnetic synchronous single bearing aerogenerator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1559604B1 (en) * | 2004-01-29 | 2008-11-05 | Magnet-Motor Gesellschaft für magnetmotorische Technik mbH | Cooled electric drive unit for a motor vehicle |
| US20090230791A1 (en) * | 2005-09-29 | 2009-09-17 | Zf Friedrichshafen Ag | Drive unit having optimized cooling |
| KR100940516B1 (en) * | 2009-09-04 | 2010-02-10 | 소치재 | Wheel provided with electric driving means |
-
2014
- 2014-04-22 CN CN201410162918.6A patent/CN105082980B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300261A (en) * | 1998-05-11 | 2001-06-20 | 奥维尔·J·伯克斯特兰德 | Modular motorized electric wheel hub assembly for bicycles and the like |
| CN1754712A (en) * | 2004-09-28 | 2006-04-05 | 三洋电机株式会社 | Hub unit for use in electrically movable wheels and vehicle comprising the hub unit |
| CN101222159A (en) * | 2007-12-24 | 2008-07-16 | 湘潭电机股份有限公司 | Cooling rib direct driven permanent magnetic synchronous single bearing aerogenerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105082980A (en) | 2015-11-25 |
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