CN114598107A - Double-helix cooling structure - Google Patents
Double-helix cooling structure Download PDFInfo
- Publication number
- CN114598107A CN114598107A CN202210286206.XA CN202210286206A CN114598107A CN 114598107 A CN114598107 A CN 114598107A CN 202210286206 A CN202210286206 A CN 202210286206A CN 114598107 A CN114598107 A CN 114598107A
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- Prior art keywords
- water jacket
- spiral
- double
- shell
- water
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- 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
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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
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
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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
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
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- 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
- H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention relates to a double-helix cooling structure, which comprises an inner water jacket and a water jacket shell, wherein the outer side surface of the inner water jacket is matched with the water jacket shell to form a double-helix cooling water channel; the water jacket shell is provided with a shell water inlet corresponding to the inner water jacket water inlet at the front end of the double-spiral groove of the inner water jacket, and the water jacket shell is provided with a shell water outlet corresponding to the inner water jacket water outlet at the tail end of the double-spiral groove of the inner water jacket. The double-spiral cooling structure scheme has a double-channel structure, so that the clogging problem of a single-channel scheme can be effectively avoided; even if one of the two channels is blocked, the cooling loop still has certain heat dissipation performance, and the problem of overhigh short-time temperature of the motor caused by local blocking can be avoided.
Description
Technical Field
The invention belongs to the technical field of liquid cooling, particularly relates to a motor liquid cooling technology, and particularly relates to a double-helix cooling structure.
Background
Along with the motorization of automobiles, various motors are applied to the whole automobiles, and along with the improvement of the performance requirements of the motors, the heating of the motors is a key factor influencing the performance of the motors. In the current liquid-cooled motor, a common cooling loop scheme is provided with an axial water channel and a zigzag water channel; the axial water channel has high requirements on the sealing performance of two end faces of the motor shell, and once the end face sealing is poor, cooling liquid enters the inner cavity of the motor, so that the motor is failed or burnt. The cooling liquid in the water channel needs to change the flow direction for many times, the general water resistance is large, the requirement on the input pressure of a heat dissipation system is high, the heat dissipation efficiency is low, and the whole energy utilization rate is low.
Because the arrangement structure restriction, liquid cooling motor advances, the delivery port position generally is located the casing both ends, leads to the coolant temperature of delivery port to be higher than the temperature of water inlet coolant liquid, promptly: the trend of gradually rising from the inlet to the outlet; and when the motor is in actual operation, the heat productivity of the windings at two ends is larger, namely: the temperature at the two ends of the motor stator is higher than the temperature at the middle part of the motor stator, so that the heat radiation effect at one end of the water outlet is poor (see attached figure 1).
The two cooling loop schemes are single-channel schemes, the blocking risk exists, when the liquid cooling loop is blocked, the flow of cooling liquid is blocked, the temperature of the motor cannot be timely dissipated, the system has over-temperature faults, and the motor can be seriously damaged.
Disclosure of Invention
The invention aims to provide a double-helix cooling structure to solve the problems that the existing liquid cooling motor is poor in heat dissipation effect and a cooling loop is blocked.
In order to achieve the purpose, the method is realized by the following technical scheme:
a double-helix cooling structure comprises an inner water jacket and a water jacket shell, wherein a double-helix groove structure is arranged on the outer side surface of the inner water jacket, and the outer side surface of the inner water jacket is matched with the water jacket shell to form a double-helix cooling water channel;
the double-spiral cooling water channel comprises a first spiral heat dissipation rib and a second spiral heat dissipation rib;
the water jacket shell is provided with a shell water inlet which corresponds to the inner water jacket water inlet at the front end of the double-spiral groove of the inner water jacket, and cooling liquid flows in from the inner water jacket water inlet and respectively flows to two adjacent spiral channels through a bifurcation point at the front end of the double-spiral groove;
and the water jacket shell is provided with a shell water outlet which corresponds to the tail end inner water jacket water outlet of the double-spiral groove of the inner water jacket, and the cooling liquid of two adjacent spiral channels is converged at the inner water jacket water outlet after passing through a convergence point and then flows out through the shell water outlet.
Furthermore, the inner water jacket and the water jacket shell are integrally formed by adopting a stirring welding process or sealed by adopting a sealing ring.
Furthermore, the water inlet and the water outlet of the inner water jacket on the inner water jacket are adjusted according to different design structures.
Further, the spiral direction of the double-spiral channel is clockwise or anticlockwise and is determined according to the flow direction of the cooling liquid.
Furthermore, the depth of the water channel of the two spiral channels is different.
Furthermore, the water channel intervals of the two spiral channels are different.
Furthermore, the coefficient of thermal conductivity of the first spiral radiating rib is different from the coefficient of thermal conductivity of the second spiral radiating rib.
Furthermore, the first spiral radiating ribs and the second spiral radiating ribs are arranged in parallel.
Compared with the prior art, the beneficial effects of this application are:
the invention provides a double-spiral cooling structure scheme which is relatively simple in structure, low in cost, adjustable in heat dissipation coefficient and small in water inlet and outlet temperature difference, is formed by friction stir welding and is easy for mass production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a graph of axial temperature profile of a motor stator;
FIG. 2 is a schematic view of the water jacket housing;
FIG. 3 is a schematic view of the inner water jacket;
FIG. 4 is a schematic view of the inner jacket coolant flow direction;
fig. 5 is a schematic diagram showing a relative positional relationship between the water jacket housing and the inner water jacket.
Description of the reference numerals
1-water jacket shell, 2-inner water jacket, 3-friction stir welding, 11-shell water inlet, 12-outer water outlet, 21-inner water jacket water inlet, 22-inner water jacket water outlet, 23-bifurcation point, 24-convergence point, 25-first spiral heat dissipation rib, 26-second spiral heat dissipation rib, W-water channel interval and H-water channel depth.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 2 to 5, the present application provides a double-spiral cooling structure, which is specifically described in conjunction with an application example of a motor, and can also be applied to heat dissipation schemes of other similar motor structures.
The utility model provides a double helix cooling structure mainly comprises water jacket shell 1 and interior water jacket 2 and seals cooling circuit, is provided with double helix groove structure including the outside surface of water jacket, and the lateral surface of interior water jacket forms double helix cooling water course with the cooperation of water jacket shell, and is concrete, interference fit and adopt friction stir welding 3 technology shaping between the outer wall of water jacket shell and interior water jacket, and the sealing performance of double helix cooling water course can be guaranteed to this scheme, ensures the reliability of this scheme. Compared with the traditional low-pressure casting (sand casting), the technical scheme has the advantages of short production time, high efficiency, easiness in mass production and lower average cost.
The utility model provides a double helix cooling water course includes two first spiral heat dissipation muscle 25 and a second spiral heat dissipation muscle 26, perhaps a first spiral heat dissipation muscle and two second spiral heat dissipation muscle, and is concrete, and the double helix groove structure of interior water jacket comprises three side, and wherein first spiral heat dissipation muscle is first side, and second spiral heat dissipation muscle is the second side, and double helix groove is by two first sides and a second side or by a first side and two second sides constitution promptly.
The water jacket housing 1 contains a housing water inlet 11 and a housing water outlet 12.
The inner water jacket 2 comprises an inner water jacket water inlet 21, an inner water jacket water outlet 22, a bifurcation point 23, a convergence point 24, a first spiral heat dissipation rib 25 and a second spiral heat dissipation rib 26, wherein the inner water jacket water inlet corresponds to the water jacket shell water inlet, the inner water jacket water outlet corresponds to the water jacket shell water outlet, the bifurcation point is located at an inner water jacket water inlet accessory, the convergence point is located at an inner water jacket water outlet accessory, and the first spiral heat dissipation rib and the second spiral heat dissipation rib are arranged in parallel, as shown in fig. 3.
The cooling circuit that water jacket shell and interior water jacket are constituteed has double helix channel structure, and after the coolant liquid got into the closed chamber, divide into two the tunnel from the bifurcation point and circulate, finally assemble at the convergent point, flow out through the delivery port, coolant liquid circulation track is as follows:
the housing water inlet 11 → the inner water jacket water inlet 21 → the bifurcation 23 → the first spiral heat dissipation rib 25, the second spiral heat dissipation rib 26 → the convergence point 24 → the inner water jacket water outlet 22 → the housing water outlet 12, as shown in fig. 4.
The first spiral radiating ribs and the second spiral radiating ribs are isolated from each other, and the cooling loop is divided into two paths. The invention preferably selects a double-channel structure, the process of the double-channel spiral structure is relatively simple, and when the three-spiral structure or the four-spiral structure is adopted, the structure is relatively complex, and the process difficulty is high (the problem of high cost caused by synchronization); furthermore, the branching point of the "three-spiral" or "four-spiral" is difficult to control, and the problem of uneven flow rate distribution is likely to occur. Compared with a single-spiral structure, the double-spiral structure has the advantages that the lead of the double-spiral structure is longer under the condition of the same distance; namely: under the condition that the positions of the water inlet and the water outlet are not changed, the double-spiral structure can shorten the distance of a passage between the water inlet and the water outlet. (specifically, reference may be made to the formula of the relationship between the thread lead s, the pitch p, and the number of spirals n: s ═ n × p).
The double-helix cooling structure can shorten the distance between the water inlet and the water outlet, reduce the temperature difference at two ends of the motor stator, effectively improve the problem of high temperature at the water outlet of the stator, improve the heat dissipation capacity at two ends of the motor stator and improve the output performance of the motor.
The double-spiral cooling structure scheme has a double-channel structure, so that the clogging problem of a single-channel scheme can be effectively avoided; even if one of the two channels is blocked, the cooling loop still has certain heat dissipation performance, and the problem of overhigh short-time temperature of the motor caused by local blocking can be avoided. When the temperature of the motor exceeds a set range, the motor temperature sensor transmits a signal to the controller, and the controller limits the output characteristics of the motor (a 'limp mode' is started, 50% of output performance of peak power and peak torque is limited, and the specific limiting proportion can be determined according to different motors and use working conditions), so that the motor can still work for a period of time to cope with emergency; sufficient response time is reserved for fault reporting and fault elimination, and the reliability of the system is further improved.
Particularly, the heat dissipation coefficient of the double-spiral cooling structure scheme is adjustable, and different heat dissipation coefficients can be realized by adjusting the water channel distance W and the water channel depth H between the first spiral heat dissipation rib and the second spiral heat dissipation rib based on different heat dissipation scenes or requirements. For the area with larger heat generation, the water channel distance W of the spiral heat dissipation ribs can be reduced, or the water channel depth H can be increased, or the water channel distance W and the water channel depth H can be adjusted simultaneously, so that the heat dissipation area of the cooling loop is increased, and the heat dissipation coefficient of the area can be improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A double-helix cooling structure is characterized by comprising an inner water jacket and a water jacket shell, wherein a double-helix groove structure is arranged on the outer side surface of the inner water jacket, and the outer side surface of the inner water jacket is matched with the water jacket shell to form a double-helix cooling water channel;
the double-spiral cooling water channel comprises a first spiral heat dissipation rib and a second spiral heat dissipation rib;
the water jacket shell is provided with a shell water inlet which corresponds to the inner water jacket water inlet at the front end of the double-spiral groove of the inner water jacket, and cooling liquid flows in from the inner water jacket water inlet and respectively flows to two adjacent spiral channels through a bifurcation point at the front end of the double-spiral groove;
and the water jacket shell is provided with a shell water outlet which corresponds to the tail end inner water jacket water outlet of the double-spiral groove of the inner water jacket, and the cooling liquid of two adjacent spiral channels is converged at the inner water jacket water outlet after passing through a convergence point and then flows out through the shell water outlet.
2. The double spiral cooling structure of claim 1, wherein the inner water jacket and the water jacket shell are integrally formed by a stir welding process or sealed by a sealing ring.
3. The double spiral cooling structure of claim 1, wherein the inner water jacket water inlet and the inner water jacket water outlet on the inner water jacket are adjusted according to different design structures.
4. The double spiral cooling structure of claim 1, wherein the spiral direction of the double spiral channel is clockwise or counterclockwise, determined according to the coolant flow direction.
5. The double spiral cooling structure of claim 1, wherein the water channels of the two spiral channels are not the same depth.
6. The twin spiral cooling structure in accordance with claim 1, wherein the water course pitch of the two spiral channels is different.
7. The double spiral cooling structure of claim 1, wherein the thermal conductivity of the first spiral heat-dissipating ribs is different from the thermal conductivity of the second spiral heat-dissipating ribs.
8. The double spiral cooling structure of claim 1, wherein the first spiral radiating rib and the second spiral radiating rib are disposed in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210286206.XA CN114598107A (en) | 2022-03-22 | 2022-03-22 | Double-helix cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210286206.XA CN114598107A (en) | 2022-03-22 | 2022-03-22 | Double-helix cooling structure |
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| Publication Number | Publication Date |
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| CN114598107A true CN114598107A (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210286206.XA Pending CN114598107A (en) | 2022-03-22 | 2022-03-22 | Double-helix cooling structure |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090127946A1 (en) * | 2007-07-03 | 2009-05-21 | Caterpillar Inc. | Cooling jacket and stator assembly for rotary electric device |
| CN201750239U (en) * | 2010-06-09 | 2011-02-16 | 无锡东元电机有限公司 | Water-jacket type water-cooled motor |
| CN207098828U (en) * | 2017-07-13 | 2018-03-13 | 比亚迪股份有限公司 | The cooling water channel and motor of a kind of motor |
| CN108736653A (en) * | 2018-07-06 | 2018-11-02 | 金龙联合汽车工业（苏州）有限公司 | A kind of motor circumferential direction double-helix cooling water channel structure |
| CN209104974U (en) * | 2018-09-28 | 2019-07-12 | 宁波沃伏龙机电有限公司 | Liquid cooling servo motor |
| CN209150874U (en) * | 2019-01-16 | 2019-07-23 | 合肥巨一动力系统有限公司 | A kind of electric machine casing radiator structure |
| CN110052890A (en) * | 2019-05-27 | 2019-07-26 | 哈尔滨理工大学 | A kind of two-way double helix cooling jacket |
| CN110336404A (en) * | 2019-06-26 | 2019-10-15 | 苏州汇川技术有限公司 | Driving motor and new-energy automobile |
| CN110445293A (en) * | 2019-08-24 | 2019-11-12 | 中船重工电机科技股份有限公司 | A kind of waterway structure of water-cooled servo motor |
| CN210490621U (en) * | 2019-08-09 | 2020-05-08 | 重庆蓝黛动力传动机械股份有限公司 | New energy automobile power motor water-cooling structure |
| CN213367539U (en) * | 2020-11-07 | 2021-06-04 | 广州小鹏汽车科技有限公司 | Water channel structure of motor for electric automobile, machine shell and motor |
-
2022
- 2022-03-22 CN CN202210286206.XA patent/CN114598107A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090127946A1 (en) * | 2007-07-03 | 2009-05-21 | Caterpillar Inc. | Cooling jacket and stator assembly for rotary electric device |
| CN201750239U (en) * | 2010-06-09 | 2011-02-16 | 无锡东元电机有限公司 | Water-jacket type water-cooled motor |
| CN207098828U (en) * | 2017-07-13 | 2018-03-13 | 比亚迪股份有限公司 | The cooling water channel and motor of a kind of motor |
| CN108736653A (en) * | 2018-07-06 | 2018-11-02 | 金龙联合汽车工业（苏州）有限公司 | A kind of motor circumferential direction double-helix cooling water channel structure |
| CN209104974U (en) * | 2018-09-28 | 2019-07-12 | 宁波沃伏龙机电有限公司 | Liquid cooling servo motor |
| CN209150874U (en) * | 2019-01-16 | 2019-07-23 | 合肥巨一动力系统有限公司 | A kind of electric machine casing radiator structure |
| CN110052890A (en) * | 2019-05-27 | 2019-07-26 | 哈尔滨理工大学 | A kind of two-way double helix cooling jacket |
| CN110336404A (en) * | 2019-06-26 | 2019-10-15 | 苏州汇川技术有限公司 | Driving motor and new-energy automobile |
| CN210490621U (en) * | 2019-08-09 | 2020-05-08 | 重庆蓝黛动力传动机械股份有限公司 | New energy automobile power motor water-cooling structure |
| CN110445293A (en) * | 2019-08-24 | 2019-11-12 | 中船重工电机科技股份有限公司 | A kind of waterway structure of water-cooled servo motor |
| CN213367539U (en) * | 2020-11-07 | 2021-06-04 | 广州小鹏汽车科技有限公司 | Water channel structure of motor for electric automobile, machine shell and motor |
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