CN105006919A - Traction motor cooling system and configuration method thereof - Google Patents
Traction motor cooling system and configuration method thereof Download PDFInfo
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- CN105006919A CN105006919A CN201510333559.0A CN201510333559A CN105006919A CN 105006919 A CN105006919 A CN 105006919A CN 201510333559 A CN201510333559 A CN 201510333559A CN 105006919 A CN105006919 A CN 105006919A
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- cooling system
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- traction electric
- blower fan
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Abstract
The invention provides a traction motor cooling system and a configuration method thereof. According to the configuration method of the traction motor cooling system, a cooling system comprises a draught fan. The configuration method comprises: determining system air quantity Q and the matching environment reference temperature T of the draught fan; computing system resistance PT; matching a draught fan parameter and computing a draught fan pressure head H according to the system resistance PT; and computing the driving motor power N of the draught fan according to the draught fan pressure head H. The invention also provides the traction motor cooling system for cooling a traction motor. The traction motor cooling system comprises an air channel assembly and a draught fan. The first end of the air channel assembly is connected with the traction motor. The draught fan is connected with the second end of the air channel assembly. The draught fan is configured by the configuration method of the traction motor cooling system. Such method for configuring the driving motor power ensures system configuration rationality and enables a driving motor to operate in a high-efficiency area so as to reduce noise and vibration.
Description
Technical field
The present invention relates to motor cooling control field, in particular to a kind of traction electric machine cooling system and collocation method thereof.
Background technology
In the layoutprocedure of traction electric machine cooling system, the cooling air quantity of traction electric machine and the draft loss of system all can have greatly changed.Existing cooling system collocation method is air quantity and the resistance of first roughly estimating traction electric machine cooling system, then matches a kind of blower fan according to estimated value, carries out the temperature rise experiment of traction electric machine subsequently.Namely.Namely traction electric machine bringing onto load on experimental bench runs, and provides cooling wind, verify, under institute's wind supply quantity, whether the temperature rise of traction electric machine under specified loads meets design requirement by selected blower fan by air channel to traction electric machine.If traction electric machine temperature rise does not meet configuration requirement, then again match fan parameter, namely the traction electric machine temperature rise value that do not transfinite is thought and is met configuration requirement.This collocation method is unreasonable, often causes traction electric machine cooling system to cool surplus excessive, and system power is superfluous, thus causes the problems such as system noise is higher, vibration is larger, have impact on car load comfort level index.
Summary of the invention
The present invention aims to provide the rational traction electric machine cooling system of a kind of configuration and collocation method thereof.
To achieve these goals, according to an aspect of the present invention, provide a kind of collocation method of traction electric machine cooling system, cooling system comprises blower fan, and collocation method comprises: the matched environment fiducial temperature T of certainty annuity air quantity Q and blower fan; Computing system resistance PT; Coupling fan parameter, calculates fan pressure head H according to systemic resistance PT; The drive motors power N of blower fan is calculated according to fan pressure head H.
Further,
wherein, N is drive motors power; Q is systematic air flow; H is fan pressure head; η is the total pressure efficiency of blower fan; η
zfor the transmission efficiency of cooling system; K
1for safety stock coefficient.
Further, 1.1≤K
1≤ 1.2.
Further, also comprise testing procedure, testing procedure comprises to be tested and the systemic resistance PT calculated under systematic air flow Q.
Further,
wherein, P is the systemic resistance under test condition; ρ
0for the gas density under matched environment fiducial temperature; ρ
1for the gas density under test condition.
Further, P=P1+P2+P3; Wherein, P1 is the Resistance Value by testing the traction electric machine under systematic air flow Q obtained; P2 is the duct resistance value by testing the air channel formed between blower fan and traction electric machine obtained; P3 is by testing and the difference of the intake resistance value of the exhaust resistance value of the cooling system calculated and cooling system.
Further, H=H1+H2, wherein, H1 is fan static pressure head, fan static pressure head H1=K
2× PT, wherein, K
2for system margin coefficient, PT is systemic resistance; H2 is blower fan dynamic head.
Further, 5%≤K
2≤ 15%.
Further, cooling system also comprises ducting assembly, collocation method also comprises verification step, traction electric machine, ducting assembly and blower fan are assembled, the operating state of simulation traction electric machine cooling system on vehicle, the actual match air quantity of test cooling system, and according to actual match air quantity adjustment fan parameter value, finally determine the drive motors performance number of required blower fan.
Further, fan parameter value comprises the air quantity of blower fan and the pressure head of blower fan.
According to another aspect of the present invention, providing a kind of traction electric machine cooling system, for cooling traction electric machine, comprising: ducting assembly, the first end of ducting assembly is connected with traction electric machine; Blower fan, blower fan is connected with the second end of ducting assembly; Blower fan is by the collocation method configuration of the traction electric machine cooling system in above-mentioned.
Further, ducting assembly and traction electric machine flexibly connect, and ducting assembly and blower fan flexibly connect.
Technical scheme of the present invention is according to the matched environment fiducial temperature T by certainty annuity air quantity Q and blower fan; Computing system resistance PT, calculates fan pressure head H according to systemic resistance PT, calculates the drive motors power N of blower fan according to fan pressure head H.Adopt the method for such configuration driven power of motor, ensure that the reasonability of system configuration, improve drive motors efficiency, thus reduce noise, reduce vibration.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the traction electric machine cooling system of the embodiment of the present invention.
Reference numeral in figure:
10, traction electric machine, 20, air channel, 30, blower fan.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
An aspect according to an embodiment of the invention, provide a kind of collocation method of traction electric machine cooling system, cooling system comprises blower fan, and collocation method comprises: the matched environment fiducial temperature T of certainty annuity air quantity Q and blower fan; Computing system resistance PT; Coupling fan parameter, calculates fan pressure head H according to systemic resistance PT; The drive motors power N of blower fan is calculated according to fan pressure head H.
Due to the needs adopting existing blower fan cannot meet electromotor cooling system, so need each parameter value again mating traction electric machine cooling system.The present invention is according to the matched environment fiducial temperature T by certainty annuity air quantity Q and blower fan; Computing system resistance PT, calculates fan pressure head H according to systemic resistance PT, calculates the drive motors power N of blower fan according to fan pressure head H.Adopt the method for such configuration driven power of motor, ensure that the reasonability of system configuration, coupling drive motors is operated in efficient district, thus reduces noise, reduces vibration.In the present embodiment, the matched environment fiducial temperature T of blower fan is the mean temperature of blower fan long-term work environment.
In one embodiment of the invention, drive motors power
Wherein, Q is systematic air flow, and unit is m
3/ s, required systematic air flow determines according to the temperature rise restriction of traction electric machine and thermal losses.H is fan pressure head, and unit is Pa.η is the total pressure efficiency of blower fan, represents with percentage, and the total pressure efficiency of blower fan is the characteristic of blower fan, is generally provided by blower fan producer, and be determined by the structure of blower fan self, blower fan has been shaped, and under identical operating mode, total pressure efficiency is identical; η
zfor the transmission efficiency of cooling system, representing with percentage, is the transmission efficiency between draught fan impeller and motor, is 100% when draught fan impeller and motor straight connect in succession; K
1for safety stock coefficient.As preferably, 1.1≤K
1≤ 1.2.Safety stock COEFFICIENT K
1be that the change of environmentally temperature is chosen, under the environment that variations in temperature difference is large, choose larger safety stock coefficient, run to avoid drive motors overpower.
In another embodiment of the invention, the collocation method of cooling system also comprises testing procedure, and testing procedure comprises to be tested and the systemic resistance PT calculated under systematic air flow Q.This testing procedure completes in the lab, can improve the accuracy of systemic resistance PT by experiment, thus makes the configuration of traction electric machine cooling system more reasonable.
Particularly,
p is the systemic resistance of the cooling blower under test condition, ρ
0for the gas density under matched environment fiducial temperature, unit is kg/m
3, ρ
1for the gas density under test condition, unit is kg/m
3.From above-mentioned computational methods, systemic resistance PT is the Resistance Value under fiducial temperature, and unit is Pa.The resistance recorded under test conditions is converted into the systemic resistance PT under matched environment fiducial temperature by said method.The method completes the measurement to important parameter in the lab, to improving the configuration accuracy of traction electric machine cooling system highly significant.
In the present embodiment, P=P1+P2+P3.Wherein, P1 is the Resistance Value by testing the traction electric machine under systematic air flow Q obtained, P2 is the duct resistance value by testing the air channel formed between blower fan and traction electric machine obtained, P3 is by testing and the difference of the intake resistance value of the exhaust resistance value of the cooling system calculated and cooling system, often carrying out estimating calculating according to the data that design experiences and existing vehicle are tested.Wherein, apparatus arrangement and intake and exhaust facilities are all depended in the intake resistance of cooling system and exhaust resistance, and such as, intake resistance is arranged by equipment compartment air inlet to be affected, as the size of equipment compartment air inlet, position and air inlet screen pattern all can affect intake resistance; For another example, exhaust resistance affects by motor position, if the equipment around motor is on the impact of motor exhausting resistance.
In configuration step, also comprise calculating fan pressure head, wherein fan pressure head H=H1+H2, H1 are fan static pressure head, fan static pressure head H1=K
2× PT, wherein, K
2for system margin coefficient, and 5%≤K
2≤ 15%, PT is systemic resistance, and H2 is blower fan dynamic head.
Choosing of system margin coefficient is considered according to the requirement of safety, system margin parameter K
2choose and depend primarily on following factor: 1, environmental condition, larger parameter need be chosen during the more easy blocking air intake filter screen of environmental debris; 2, temperature conditions, when vehicle uses temperature to choose larger parameter to avoid high temperature compared with Gao Shixu, traction electric machine heat radiation is unfavorable.In the present embodiment, traction electric machine is used in motor train unit.When motor train unit is used for special line, because the change of surrounding environment can good predict, therefore surplus coefficient is eligible lower.In other embodiments, system margin parameter K
2choose also be subject to cooling system auxiliary system impact, as the electric power system of cooling system, when electric power system power headroom is larger, then can choose larger margin parameter, to adapt to severe operation environment.
Preferably, cooling system also comprises ducting assembly, collocation method also comprises verification step, traction electric machine, ducting assembly and blower fan are assembled, the operating state of simulation traction electric machine cooling system on vehicle, the actual match air quantity of test cooling system, and according to actual match air quantity adjustment fan parameter value, the fan parameter value of adjustment comprises the air quantity of blower fan and the pressure head of blower fan, finally determines the power of motor value of required blower fan.By verification step, the operating state of analogue system under true environment, the actual match air quantity of test cooling system, thus whether checking air quantity can meet system configuration requirements.
In the another aspect of embodiments of the invention, additionally providing a kind of traction electric machine cooling system, for cooling traction electric machine 10, comprising: ducting assembly 20, the first end of ducting assembly 20 is connected with traction electric machine 10; Blower fan 30, blower fan 30 is connected with the second end of ducting assembly 20; Blower fan 30 is by the collocation method configuration of the traction electric machine cooling system in above-mentioned.Preferably, ducting assembly 20 and traction electric machine flexibly connect, and ducting assembly 20 and blower fan 30 flexibly connect.By flexibly connecting of ducting assembly 20 and traction electric machine and blower fan 30, alignment error can be overcome when assembling parts.Flexibly connecting in the present embodiment can be realized by rubber connector.
Preferably, the traction electric machine cooling device in the present invention, for motor-car, flexibly connects also to rock between parts in running motor-car and cushions.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
Adopt the collocation method of above-mentioned traction cooling system, ensure that the reasonability of system configuration, coupling drive motors runs in efficient district, thus reduces noise, reduces vibration.
By verification step, the operating state of analogue system under true environment, the actual match air quantity of test cooling system, thus whether checking air quantity can meet system configuration requirements.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a collocation method for traction electric machine cooling system, described cooling system comprises blower fan, it is characterized in that, described collocation method comprises:
The matched environment fiducial temperature T of certainty annuity air quantity Q and described blower fan;
Computing system resistance PT;
Coupling fan parameter, calculates fan pressure head H according to systemic resistance PT;
The drive motors power N of described blower fan is calculated according to described fan pressure head H.
2. the collocation method of traction electric machine cooling system according to claim 1, is characterized in that,
Wherein, N is described drive motors power;
Q is described systematic air flow;
H is described fan pressure head;
η is the total pressure efficiency of described blower fan;
η
zfor the transmission efficiency of described cooling system;
K
1for safety stock coefficient.
3. the collocation method of traction electric machine cooling system according to claim 2, is characterized in that, 1.1≤K
1≤ 1.2.
4. the collocation method of traction electric machine cooling system according to claim 2, is characterized in that, also comprise testing procedure, and described testing procedure comprises to be tested and the systemic resistance PT calculated under described systematic air flow Q.
5. the collocation method of traction electric machine cooling system according to claim 4, is characterized in that,
Wherein, P is the systemic resistance under test condition;
ρ
0for the gas density under described matched environment fiducial temperature;
ρ
1for the gas density under test condition.
6. the collocation method of traction electric machine cooling system according to claim 5, is characterized in that, P=P1+P2+P3;
Wherein, P1 is the Resistance Value by testing the traction electric machine under described systematic air flow Q obtained;
P2 is the duct resistance value by testing the air channel formed between described blower fan and described traction electric machine obtained;
P3 is by testing and the difference of the exhaust resistance value of the described cooling system calculated and the intake resistance value of described cooling system.
7. the collocation method of traction electric machine cooling system according to claim 6, is characterized in that, H=H1+H2,
Wherein, H1 is fan static pressure head, described fan static pressure head H1=K
2× PT, wherein, K
2for described system margin coefficient, PT is described systemic resistance;
H2 is blower fan dynamic head.
8. the collocation method of traction electric machine cooling system according to claim 7, is characterized in that, 5%≤K
2≤ 15%.
9. the collocation method of traction electric machine cooling system according to claim 1, it is characterized in that, described cooling system also comprises ducting assembly, described collocation method also comprises verification step, described traction electric machine, described ducting assembly and described blower fan are assembled, simulate the operating state of described traction electric machine cooling system on vehicle, test the actual match air quantity of described cooling system, and adjust described fan parameter value according to described actual match air quantity, finally determine the drive motors performance number of required described blower fan.
10. the collocation method of traction electric machine cooling system according to claim 9, is characterized in that, described fan parameter value comprises the air quantity of described blower fan and the pressure head of described blower fan.
11. 1 kinds of traction electric machine cooling systems, for cooling traction electric machine (10), comprising:
Ducting assembly (20), the first end of described ducting assembly (20) is connected with described traction electric machine (10);
Blower fan (30), described blower fan (30) is connected with the second end of described ducting assembly (20);
It is characterized in that, described blower fan (30) is configured by the collocation method of the traction electric machine cooling system described in any one of claim 1 to 10.
12. traction electric machine cooling systems according to claim 11, is characterized in that, described ducting assembly (20) and described traction electric machine flexibly connect, and described ducting assembly (20) and described blower fan (30) flexibly connect.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510333559.0A CN105006919B (en) | 2015-06-16 | 2015-06-16 | Traction electric machine cooling system and its configuration method |
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| CN201510333559.0A CN105006919B (en) | 2015-06-16 | 2015-06-16 | Traction electric machine cooling system and its configuration method |
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| Publication Number | Publication Date |
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| CN105006919A true CN105006919A (en) | 2015-10-28 |
| CN105006919B CN105006919B (en) | 2018-09-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109098995A (en) * | 2017-06-21 | 2018-12-28 | 中车青岛四方机车车辆股份有限公司 | A kind of traction electric machine cooling system air duct and draught fan performance test method and device |
| WO2022147854A1 (en) * | 2021-01-06 | 2022-07-14 | 中车唐山机车车辆有限公司 | Method and system for controlling cooling fan of traction motor, and freight train |
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| US6889516B2 (en) * | 2003-04-03 | 2005-05-10 | Hitachi, Ltd. | Cooling system for motor and cooling control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109098995A (en) * | 2017-06-21 | 2018-12-28 | 中车青岛四方机车车辆股份有限公司 | A kind of traction electric machine cooling system air duct and draught fan performance test method and device |
| CN109098995B (en) * | 2017-06-21 | 2020-01-10 | 中车青岛四方机车车辆股份有限公司 | Method and device for testing performance of air duct and fan of traction motor cooling system |
| WO2022147854A1 (en) * | 2021-01-06 | 2022-07-14 | 中车唐山机车车辆有限公司 | Method and system for controlling cooling fan of traction motor, and freight train |
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| CN105006919B (en) | 2018-09-25 |
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Address after: Chengyang District of Shandong city of Qingdao province Jinhong road 266111 No. 88 Applicant after: CRRC QINGDAO SIFANG CO., LTD. Address before: Chengyang District of Shandong city of Qingdao province Jinhong road 266111 No. 88 Applicant before: CSR Qingdao Sifang Locomotive and Rolling Stock Co., Ltd. |
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