CN113199936B - Pipeline distribution design method for vehicle cooling system and vehicle cooling system - Google Patents
Pipeline distribution design method for vehicle cooling system and vehicle cooling system Download PDFInfo
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- CN113199936B CN113199936B CN202110678263.8A CN202110678263A CN113199936B CN 113199936 B CN113199936 B CN 113199936B CN 202110678263 A CN202110678263 A CN 202110678263A CN 113199936 B CN113199936 B CN 113199936B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
Abstract
The invention relates to a method for designing the pipeline distribution of a cooling system for a vehicle and a cooling system for the vehicle, which comprises the following steps: acquiring data parameters of elements required by a design method; establishing a flow water resistance fitting curve of each element according to the data parameters; establishing each parallel branch submodule according to the flow water resistance fitting curve of each element; collecting flow and water resistance parameters of each parallel branch submodule, and establishing a flow water resistance fitting curve of each parallel branch submodule; calculating the optimal flow value of each parallel branch submodule by combining the flow water resistance fitting curve of each parallel branch submodule and the flow water resistance fitting curve of the related element, evaluating and analyzing the optimal flow value, and obtaining an optimal pipeline distribution scheme; and reasonably distributing the arrangement positions of the elements and the water flow route in the cooling system according to the optimal pipeline distribution scheme.
Description
Technical Field
The application relates to the field of water flow distribution design of an automobile cooling system, in particular to a pipeline distribution design method of an automobile cooling system and the automobile cooling system.
Background
With the continuous development of new energy technology of automobiles, the thermal management of the whole automobile is increasingly perfected, but the endurance mileage and the safety of batteries are still the technical bottlenecks of new energy automobiles. In a short period, a cooling system is more reasonably arranged to ensure that a cooling assembly of the new energy automobile does not have problems at a proper temperature, and the method is one direction of the heat management development of new energy. New energy automobile needs the cooling assembly to require stringently to the temperature of intaking, and a lot of motorcycle types are for arranging the convenience, and each needs refrigerated component of direct series connection leads to cooling system pipeline water resistance to grow. Therefore, a larger water pump has to be adopted, however, when the water pump works in a low-efficiency area through theoretical calculation, in order to ensure that the water inlet temperature of the last cooling element meets the requirement, the water temperature when the fan is started has to be reduced, unnecessary power consumption is caused, and the cruising range of the whole vehicle is reduced.
Therefore, how to reasonably distribute the arrangement positions of the elements needing cooling and the route of the water flow of the cooling system becomes a key technology.
Disclosure of Invention
Based on the method, the invention provides a pipeline distribution design method of a cooling system for a vehicle and the cooling system for the vehicle, so as to reasonably distribute the arrangement positions of all elements needing cooling and the water flow route of the cooling system.
In order to achieve the above object, the present invention provides a method for designing a pipeline distribution of a cooling system for a vehicle, comprising the steps of:
acquiring data parameters of elements required by the vehicle cooling system pipeline distribution design method;
establishing a flow water resistance fitting curve of each element according to the data parameters;
establishing each parallel branch submodule according to the flow water resistance fitting curve of each element;
collecting flow and water resistance parameters of each parallel branch submodule, and establishing a flow water resistance fitting curve of each parallel branch submodule;
calculating the optimal flow value of each parallel branch submodule by combining the flow water resistance fitting curve of each parallel branch submodule and the flow water resistance fitting curve of the related element, evaluating and analyzing the optimal flow value based on the standard of whether the optimal flow value is larger than the minimum required value of the pipeline flow, and obtaining an optimal pipeline distribution scheme;
and reasonably distributing the placement positions of the elements and the water flow route in the cooling system according to the optimal pipeline distribution scheme.
In one embodiment, the elements include at least two of a water pump, a quad element, a motor controller element, a fuel accessory element, and a motor element.
In one embodiment, the step of obtaining data parameters of elements required by the method for designing the vehicle cooling system pipeline distribution includes:
collecting the lift of the water pump at different flow rates when the water pump works, namely collecting parameters of the water pump;
collecting water resistance parameters of the four-in-one element under different flow rates;
collecting water resistance parameters of the motor controller element under different flow rates;
collecting water resistance parameters of the fuel-electric accessory element under different flow rates;
collecting water resistance parameters of the motor element under different flow rates;
wherein, the water resistance parameter refers to the magnitude of pressure drop under different water flows.
In one embodiment, the step of establishing a flow water resistance fitted curve for each of the elements according to the data parameters includes:
converting the water resistance parameters of the four-in-one element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the four-in-one element;
converting water resistance parameters of the motor controller element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the motor controller element;
converting the water resistance parameters of the fuel-electric accessory element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the fuel-electric accessory element;
converting the water resistance parameters of the motor element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the motor element;
and converting the water resistance parameters of the water pump into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the water pump.
In one embodiment, the step of establishing each parallel branch submodule according to a flow water resistance fitting curve of each element includes:
analyzing the flow water resistance fitting curve of each element, and judging the water resistance of each element under the same flow;
dividing each element into a plurality of parallel branch sub-modules according to the principle that the difference value between the total water resistance of the elements in each parallel branch sub-module is within a preset range;
connecting the elements in each parallel branch submodule and connecting each parallel branch submodule with the water pump.
In one embodiment, the step of acquiring the flow and water resistance parameters of each parallel branch submodule and establishing a flow and water resistance fitting curve of each parallel branch submodule includes:
collecting flow and water resistance parameters of each parallel branch submodule;
and converting the water resistance parameters of the parallel branch submodules into coordinate axis parameter data, and establishing flow water resistance fitting curves of the parallel branch submodules.
In one embodiment, the step of calculating an optimal flow value of each parallel branch submodule by combining the flow water resistance fitting curve of each parallel branch submodule and the flow water resistance fitting curve of the relevant element, performing evaluation and analysis based on a criterion of whether the optimal flow value is greater than a minimum required pipeline flow value, and obtaining an optimal pipeline distribution scheme includes:
respectively combining the flow water resistance fitting curve of each parallel branch sub-module with the flow water resistance fitting curve of the water pump;
calculating the optimal flow value of each parallel branch submodule;
comparing the optimal flow value of each parallel branch submodule with the minimum flow value of the parallel branch submodule, and evaluating and analyzing;
and obtaining an optimal pipeline distribution scheme according to the analysis result.
In order to realize the purpose of the invention, the invention also adopts the following technical scheme:
a cooling system for a vehicle, which uses the above-mentioned method for designing the distribution of cooling system pipelines, comprises: the cooling module, the expansion water tank, the water pump, the first parallel branch submodule and the second parallel branch submodule are connected in parallel;
the cooling module is connected with the expansion water tank and the water pump; the water pump is connected with the first parallel branch submodule and the second parallel branch submodule and drives cooling liquid to pass through the first parallel branch submodule and the second parallel branch submodule and complete circulation in the cooling system.
In one embodiment, the first parallel branch submodule comprises a four-in-one element and an electric machine element; the second parallel branch submodule includes a motor controller component and a fuel accessory component.
In one embodiment, in the first parallel branch submodule, the four-in-one element is arranged at one end of the motor element close to the water pump;
in the second parallel branch submodule, the motor controller element is disposed at an end of the fuel accessory element near the water pump.
The invention has the beneficial effects that: according to the method for designing the pipeline distribution of the cooling system for the vehicle, the parameters of the water pump and the flow water resistance parameters of the elements needing cooling are obtained to fit the flow water resistance curves of the elements, the parallel branch submodules and the fitting curves of the parallel branch submodules are established according to the flow water resistance curves of the elements, and the optimal pipeline distribution scheme is determined according to the fitting curves of the parallel branch submodules, so that the placing positions of the elements needing cooling and the pipeline water flow branches are distributed and set according to the optimal pipeline distribution scheme. According to the design method, only the water resistance data of the element to be cooled needs to be known, the polynomial equation of the curve is obtained by fitting the water resistance data of each element, then the optimal flow value of the element to be cooled is calculated, and a complex three-dimensional cooling flow field is simplified into a one-dimensional data formula, so that the calculation is simpler and more convenient, and whether the water flow of each branch submodule meets the use standard can be conveniently and quickly evaluated. The design method is wide in application range, not only suitable for fuel cell vehicles, but also suitable for new energy vehicles to design parallel cooling loops by adopting the method under the condition that the arrangement of the whole vehicle is allowed. By using the design method, the problem of vehicle thermal management caused by uneven flow distribution can be avoided in the design stage, and the vehicle manufacturing cost is greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for designing the distribution of cooling system pipes for a vehicle.
FIG. 2 is a flow water resistance fit graph of a four in one element.
FIG. 3 is a flow water resistance fit graph of a motor controller element.
FIG. 4 is a flow-to-water resistance fit graph of a fuel accessory element.
Fig. 5 is a flow water resistance fit graph of the motor element.
FIG. 6 is a flow water resistance fit graph of a water pump element.
FIG. 7 is a flow water resistance fit graph of each element.
FIG. 8 is a flow water resistance fitting curve diagram of a sub-module of a four-in-one element and a parallel branch of a motor element.
FIG. 9 is a flow water resistance fit graph for a parallel branch submodule of the motor controller component and the fuel accessory component.
Fig. 10 is a fitting curve graph of a four-in-one + motor parallel branch and a water pump.
FIG. 11 is a graph of a fit of a parallel branch of the motor controller + fuel accessory to a water pump.
Fig. 12 is a schematic view of a cooling system for a vehicle.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic depictions of the above terms do not necessarily refer to the same embodiment or example.
In order to reasonably distribute the arrangement positions of all elements needing cooling and the routes of the water flow of the cooling system, the embodiment provides a pipeline distribution design method of the cooling system for the vehicle.
As shown in fig. 1, a schematic flow chart of the method for designing a vehicle cooling system pipeline distribution provided in this embodiment specifically includes the following steps:
s10, acquiring data parameters of elements required by the method for designing the pipeline distribution of the cooling system for the vehicle;
the parameters of each required element, including the water resistance parameters of each element under different water flows, are obtained, and the relation of each element about the water flows and the water resistance parameters can be obtained. The water resistance parameter refers to the magnitude of pressure drop at different water flows.
S20, establishing a flow water resistance fitting curve of each element according to the data parameters;
fitting flow water resistance fitting curves of all the elements according to the acquired parameters, and calculating the water resistance relation among all the elements through all the fitting curves in a mathematical mode.
S30, establishing sub-modules of the parallel branches according to flow water resistance fitting curves of the elements;
through the obtained fitting curve among the elements, the sequencing of the water resistance among the elements under the same water flow can be approximately observed, and then the submodules of the parallel branches are established according to the size relation of the water resistance among the elements. The total water resistance requirements among all the parallel branch sub-modules are not different, and the optimal total water resistance among all the parallel branch sub-modules is the same.
S40, collecting flow and water resistance parameters of each parallel branch submodule, and establishing a flow water resistance fitting curve of each parallel branch submodule;
and calculating the water resistance parameters of each parallel branch submodule under different water flows through the fitting curve among all the elements, and establishing the flow water resistance fitting curve of each parallel branch submodule through the obtained flow and water resistance parameters.
S50, calculating the optimal flow value of each parallel branch submodule by combining the flow water resistance fitting curve of each parallel branch submodule and the flow water resistance fitting curve of a related element, evaluating and analyzing the optimal flow value based on the standard of whether the optimal flow value is larger than the minimum required value of the pipeline flow, and obtaining an optimal pipeline distribution scheme;
and combining the flow water resistance fitting curve of each parallel branch submodule with the flow water resistance fitting curve of a related element, wherein the related element comprises a water pump. And the intersection point between the flow water resistance fitting curve of the parallel branch submodule and the flow water resistance fitting curve of the water pump is the optimal water flow of the parallel branch submodule. And comparing the calculated optimal water flow of the parallel branch submodule with the minimum flow required by the parallel branch submodule to judge whether the parallel branch submodule meets the requirement. So that an optimal line allocation scheme can be determined.
And S60, reasonably distributing the arrangement positions of the elements and the water flow route in the cooling system according to the optimal pipeline distribution scheme.
The arrangement positions of the individual elements and the water flow paths through the individual elements are set accordingly as a function of the determined optimum line distribution.
According to the method for designing the pipeline distribution of the cooling system for the vehicle, the parameters of the water pump and the flow water resistance parameters of the elements needing cooling are obtained to fit the flow water resistance curves of the elements, the parallel branch submodules and the fitting curves of the parallel branch submodules are established according to the flow water resistance curves of the elements, and the optimal pipeline distribution scheme is determined according to the fitting curves of the parallel branch submodules, so that the placing positions of the elements needing cooling and the pipeline water flow branches are distributed and set according to the optimal pipeline distribution scheme. According to the design method, only the water resistance data of the element to be cooled needs to be known, the polynomial equation of the curve is obtained by fitting the water resistance data of each element, then the optimal flow value of the element to be cooled is calculated, and a complex three-dimensional cooling flow field is simplified into a one-dimensional data formula, so that the calculation is simpler and more convenient, and whether the water flow of each branch submodule meets the use standard can be conveniently and quickly evaluated. The design method is wide in application range, not only suitable for fuel cell vehicles, but also suitable for new energy vehicles to design parallel cooling loops by adopting the method under the condition that the arrangement of the whole vehicle is allowed. By using the design method, the problem of vehicle thermal management caused by uneven flow distribution can be avoided in the design stage, and the vehicle manufacturing cost is greatly reduced.
In one embodiment, the components include at least two of a water pump, a quad component, a motor controller component, a fuel accessory component, and a motor component.
In one embodiment, the step of obtaining data parameters of the components required by the design method for the distribution of the cooling system pipelines of the vehicle S10 includes: step S11-step S15. Specifically, S11, collecting the water resistance of the water pump at different flow rates when the water pump works to obtain parameters of the water pump. In this embodiment, a 9P8 model water pump is taken as an example.
TABLE 1 parameters of the Water Pump 9P8
S12, collecting water resistance parameters of the four-in-one element under different flow rates.
TABLE 2 Water resistance parameters of four-in-one element
| Flow (L/MIN) | Water resistance (KPA) |
| 0 | 0 |
| 9 | 11.658 |
| 12 | 19.472 |
| 15 | 30.112 |
| 18 | 38.93 |
And S13, collecting water resistance parameters of the motor controller element under different flow rates.
TABLE 3 Water resistance parameters of Motor controller elements
| Flow (L/MIN) | Water resistance (KPA) |
| 15 | 7 |
| 18 | 13 |
| 20 | 16 |
| 25 | 28 |
| 30 | 43 |
And S14, collecting water resistance parameters of the fuel accessory element under different flow rates.
TABLE 4 Water resistance parameters of Fuel Accessory elements
| Flow (L/MIN) | Water resistance (KPA) |
| 0 | 0.0 |
| 5 | 1.3 |
| 10 | 4.3 |
| 15 | 9.2 |
| 20 | 16.0 |
| 25 | 24.6 |
| 30 | 35.1 |
| 35 | 47.4 |
| 40 | 61.7 |
S15, collecting water resistance parameters of the motor element under different flow rates.
TABLE 5 Water resistance parameters of the Electrical machine elements
| Flow (L/MIN) | Water resistance (KPA) |
| 15 | 7.5 |
| 20 | 10.1 |
| 25 | 14.2 |
| 30 | 18.7 |
Wherein, the water resistance parameter refers to the pressure drop under different water flows.
In one embodiment, the step of S20, establishing a flow water resistance fitting curve for each element according to the data parameters, includes steps S21 to S25:
and S21, converting the water resistance parameters of the four-in-one element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the four-in-one element.
Table 6 water resistance parameter coordinate axis conversion table of four-in-one element
| Flow (L/MIN) | Water resistance (KPA) | Dimensionless | Dimensionless Y | |
| 0 | 0 | 0 | 0 | |
| 9 | 11.658 | 9 | 11.658 | |
| 12 | 19.472 | 12 | 19.472 | |
| 15 | 30.112 | 15 | 30.112 | |
| 18 | 38.93 | 18 | 38.93 |
The flow water resistance fitting curve of the four-in-one element is obtained according to the parameters of table 6 and is shown in fig. 2.
And S22, converting the water resistance parameters of the motor controller element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the motor controller element.
TABLE 7 water resistance parameter coordinate axis conversion table for motor controller element
| Flow (L/MIN) | Water resistance (KPA) | Dimensionless | Dimensionless Y | |
| 15 | 7 | 15 | 7 | |
| 18 | 13 | 18 | 13 | |
| 20 | 16 | 20 | 16 | |
| 25 | 28 | 25 | 28 | |
| 30 | 43 | 30 | 43 |
A flow water resistance fit curve for the motor controller element is obtained from the parameters of table 7 and is shown in fig. 3.
And S23, converting the water resistance parameters of the fuel-electric accessory element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the fuel-electric accessory element.
TABLE 8 water resistance parameter coordinate axis conversion table of fuel accessory element
The flow water resistance fitted curve of the fuel accessory element was obtained according to the parameters of table 8 and is shown in fig. 4.
And S24, converting the water resistance parameters of the motor element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the motor element.
TABLE 9 water resistance parameter coordinate axis conversion table of motor element
| Flow (L/MIN) | Water resistance (KPA) | Dimensionless | Dimensionless Y | |
| 15 | 7.5 | 15 | 7.5 | |
| 20 | 10.1 | 20 | 10.1 | |
| 25 | 14.2 | 25 | 14.2 | |
| 30 | 18.7 | 30 | 18.7 |
A flow water resistance fitted curve of the motor element was obtained according to the parameters of table 9, and is shown in fig. 5.
And S25, converting the water resistance parameters of the water pump into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the water pump.
Table 10 water resistance parameter coordinate axis conversion table of water pump
A flow water resistance fit curve for the water pump is obtained from the parameters of table 10 and is shown in fig. 6.
In one embodiment, the step of S30, fitting a curve according to the flow water resistance of each element, and establishing each parallel branch submodule includes steps S31 to S33:
and S31, analyzing the flow water resistance fitting curve of each element, and judging the water resistance of each element under the same flow.
Specifically, the water resistance of each element under the same flow is obtained according to a flow water resistance fitting curve of the four-in-one element, a flow water resistance fitting curve of the motor controller element, a flow water resistance fitting curve of the fuel accessory element and a flow water resistance fitting curve of the motor element.
TABLE 11 Water resistance of elements at same flow
As shown in fig. 7, the flow water resistance diagram of each element is shown. When the water flow of each element is more than 20L/MIN, the water resistance of the four-in-one element is the largest, the water resistance of the motor controller element is the second largest, the water resistance of the fuel accessory element is the third largest, and the water resistance of the motor element is the smallest under the same water flow. Wherein the minimum requirement of each element for pipeline water flow is 20L/MIN.
And S32, dividing each element into a plurality of parallel branch sub-modules according to the principle that the difference value between the total water resistance of the elements in each parallel branch sub-module is within a preset range.
According to the principle that the difference between the total water resistance amounts of the elements in each parallel branch submodule is within a preset range, the preset range requires that the difference between the total water resistance amounts of the elements in each parallel branch submodule is within 200, namely, the difference between the total water resistance amounts of the elements in each parallel branch submodule is not large, and the smaller the difference between the total water resistance amounts of the elements in each parallel branch submodule is, the better the difference is. In the most ideal situation, the difference between the total water resistances of the elements in each parallel branch submodule is 0.
Therefore, the four-in-one element with the largest water resistance and the motor element with the smallest water resistance under the same water flow are set as a parallel branch submodule. The motor controller element with the second largest water resistance and the fuel electric accessory element with the third largest water resistance under the same water flow are arranged into a parallel branch submodule.
In the parallel branch submodule of the four-in-one element and the motor element, the radiator quantity of the four-in-one element is smaller than that of the motor element, so that the four-in-one element is arranged at the front end of the parallel branch submodule, namely the end close to the water pump element. The motor element is arranged at the rear end of the parallel branch submodule, namely the end far away from the water pump element. Similarly, in the parallel branch submodule of the motor controller element and the fuel and electric accessory element, the motor controller element is arranged at the front end of the parallel branch submodule, and the fuel and electric accessory element is arranged at the rear end of the parallel branch submodule.
And S33, connecting elements in each parallel branch submodule, and connecting each parallel branch submodule with the water pump.
And connecting the four-in-one element, the motor element parallel branch submodule, the motor controller element and the fuel and electric accessory element parallel branch submodule water pump to form a cooling system with two parallel branches.
In one embodiment, the step of S40 acquiring the flow and water resistance parameters of each parallel branch submodule and establishing a flow and water resistance fitting curve of each parallel branch submodule includes steps S41 to S42:
s41, collecting flow and water resistance parameters of each parallel branch submodule.
Table 12 water resistance parameter of four-in-one element, parallel branch submodule of motor element
| Flow (L/MIN) | Water resistance (KPA) |
| 5 | 9.4489 |
| 10 | 20.0474 |
| 15 | 36.2359 |
| 20 | 58.0144 |
| 25 | 85.3829 |
| 30 | 118.3414 |
| 35 | 156.8899 |
| 40 | 201.0284 |
TABLE 13 Water resistance parameters of parallel branch submodules of motor controller element and fuel accessory element
| Flow (L/MIN) | Water resistance (KPA) |
| 5 | 1.2613 |
| 10 | 5.4032 |
| 15 | 16.4772 |
| 20 | 32.2662 |
| 25 | 52.7702 |
| 30 | 77.9892 |
| 35 | 107.9232 |
| 40 | 142.5722 |
And S42, converting the water resistance parameters of the sub-modules of the parallel branch circuits into coordinate axis parameter data, and establishing flow water resistance fitting curves of the sub-modules of the parallel branch circuits.
Water resistance parameter coordinate axis conversion table of table 14 four-in-one element and motor element parallel branch submodule
| Flow (L/MIN) | Water resistance (KPA) | Dimensionless | Dimensionless Y | |
| 5 | 9.4489 | 5 | 9.4489 | |
| 10 | 20.0474 | 10 | 20.0474 | |
| 15 | 36.2359 | 15 | 36.2359 | |
| 20 | 58.0144 | 20 | 58.0144 | |
| 25 | 85.3829 | 25 | 85.3829 | |
| 30 | 118.3414 | 30 | 118.3414 | |
| 35 | 156.8899 | 35 | 156.8899 | |
| 40 | 201.0284 | 40 | 201.0284 |
And obtaining a flow water resistance fitting curve of the four-in-one element and motor element parallel branch submodule according to the parameters of the table 14, wherein the flow water resistance fitting curve of the four-in-one element and motor element parallel branch submodule is shown in fig. 8.
Table 15 water resistance parameter coordinate axis conversion table for parallel branch submodule of motor controller element and fuel-electric accessory element
| Flow (L/MIN) | Water resistance (KPA) | Nothing (a)Line | Dimensionless Y | |
| 5 | 1.2613 | 5 | 1.2613 | |
| 10 | 5.4032 | 10 | 5.4032 | |
| 15 | 16.4772 | 15 | 16.4772 | |
| 20 | 32.2662 | 20 | 32.2662 | |
| 25 | 52.7702 | 25 | 52.7702 | |
| 30 | 77.9892 | 30 | 77.9892 | |
| 35 | 107.9232 | 35 | 107.9232 | |
| 40 | 142.5722 | 40 | 142.5722 |
Flow water resistance fitting curves of the parallel branch sub-modules of the motor controller element and the fuel and electricity accessory element are obtained according to the parameters of the table 15, and are shown in fig. 9.
In one embodiment, the step S50 of calculating the optimal flow value of each parallel branch submodule by combining the flow-water resistance fitting curve of each parallel branch submodule and the flow-water resistance fitting curve of the related element, and performing evaluation and analysis based on the criterion that whether the optimal flow value is greater than the minimum required value of the pipeline flow, and obtaining the optimal pipeline allocation scheme includes steps S51 to S54:
s51, respectively combining the flow water resistance fitting curve of each parallel branch sub-module with the flow water resistance fitting curve of the water pump;
referring to fig. 10 and 11, in fig. 10, the optimal flow value of the four-in-one element and the parallel branch submodule of the motor element is the intersection point between the flow water resistance fitting curve of the four-in-one element and the parallel branch submodule of the motor element and the flow water resistance fitting curve of the water pump. In fig. 11, the optimal flow value of the parallel branch submodule of the motor controller element and the fuel-electric accessory element is the intersection point between the flow water resistance fitting curve of the parallel branch submodule of the motor controller element and the fuel-electric accessory element and the flow water resistance fitting curve of the water pump.
And S52, calculating the optimal flow value of each parallel branch submodule.
And calculating to obtain the water flow of the intersection point between the two fitting curves as 35.56L/MIN by combining the flow water resistance fitting curve of the four-in-one element and the parallel branch submodule of the motor element and the flow water resistance fitting curve of the water pump, wherein the water resistance of the four-in-one element and the parallel branch submodule of the motor element is 161.56KPA.
And calculating to obtain the water flow of the intersection point between the two fitting curves as 40.69L/MIN by combining the flow water resistance fitting curve of the parallel branch submodule of the motor controller element and the fuel-electric accessory element and the flow water resistance fitting curve of the water pump, wherein the water resistance of the parallel branch submodule of the motor controller element and the fuel-electric accessory element is 148.07KPA.
And S53, comparing the optimal flow value of each parallel branch submodule with the minimum flow value of the parallel branch submodule, and evaluating and analyzing.
The minimum flow value of the four-in-one element and motor element parallel branch submodule is 20L/MIN, and the flow of the four-in-one element and motor element parallel branch submodule is 35.56L/MIN which is larger than the minimum flow value. The four-in-one element and the motor element parallel branch sub-module meet the design requirement.
The minimum flow value of the parallel branch sub-module of the motor controller element and the fuel and electric accessory element is 25L/MIN, and the flow of the parallel branch sub-module of the motor controller element and the fuel and electric accessory element is 40.69L/MIN which is larger than the minimum flow value. The parallel branch submodules of the motor controller element and the fuel-electric accessory meet the design requirements.
And S54, obtaining an optimal pipeline distribution scheme according to the analysis result.
According to the analysis result, a cooling system pipeline distribution method can be obtained. The four-in-one element and the motor element are set to be the same water flow pipeline, and the motor controller element and the fuel and electricity accessory element are set to be the same water flow pipeline. And the four-in-one element, the motor element water flow pipeline, the motor controller element and the fuel and electricity accessory element water flow pipeline are connected in parallel and connected to the same water pump.
In one embodiment, the step of S60, reasonably distributing the arrangement positions of the components and the water flow routes in the cooling system according to the optimal pipeline distribution scheme comprises:
the four-in-one element and the motor element are combined to form a parallel branch, and the radiator quantity of the four-in-one element is smaller than that of the motor element, so that the four-in-one element is arranged at the front end of the parallel branch submodule, namely the end close to the water pump element. The motor element is arranged at the rear end of the parallel branch submodule, namely the end far away from the water pump element.
The motor controller element and the fuel accessory element are combined to form a parallel branch, and the radiator quantity of the motor controller element is smaller than that of the fuel accessory element, so that the motor controller element is arranged at the front end of the parallel branch submodule, and the fuel accessory element is arranged at the rear end of the parallel branch submodule.
One water flow in the cooling system passes through the four-in-one element and the motor element parallel branch submodule, and the other water flow passes through the motor controller element and the fuel accessory element parallel branch submodule.
As shown in fig. 12, the present embodiment further provides a cooling system for a vehicle, where the method for designing a pipeline distribution of a cooling system for a vehicle provided in the present embodiment is used, and the method includes: the cooling module, the expansion water tank, the water pump, the first parallel branch submodule and the second parallel branch submodule are arranged on the water tank;
the cooling module is connected with the expansion water tank and the water pump; the water pump is connected with the first parallel branch submodule and the second parallel branch submodule and drives the cooling liquid to pass through the first parallel branch submodule and the second parallel branch submodule and complete circulation in the cooling system.
According to the cooling system for the vehicle, the pipeline distribution design method of the cooling system for the vehicle is used, all elements needing cooling are connected in parallel to form the branch sub-modules, a small water pump can be adopted, and the use cost is reduced; and the opening times of the fan are reduced, the electric quantity of the battery is saved, and the endurance mileage of the whole vehicle is increased.
In one embodiment, the first parallel branch submodule includes a four-in-one element and an electromechanical element; the second parallel branch submodule includes a motor controller component and a fuel accessory component.
In one embodiment, in the first parallel branch submodule, the four-in-one element is arranged in front of the motor element, namely the four-in-one element is positioned at one end close to the water pump;
in the second parallel branch submodule, the motor controller element is arranged in front of the fuel cell accessory element, i.e. the motor controller element is located close to one end of the water pump.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features of the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A method for designing the distribution of cooling system pipelines for a vehicle is characterized by comprising the following steps:
acquiring data parameters of elements required by the vehicle cooling system pipeline distribution design method;
establishing a flow water resistance fitting curve of each element according to the data parameters;
establishing each parallel branch submodule according to the flow water resistance fitting curve of each element;
collecting flow and water resistance parameters of each parallel branch submodule, and establishing a flow water resistance fitting curve of each parallel branch submodule;
calculating the optimal flow value of each parallel branch submodule by combining the flow water resistance fitting curve of each parallel branch submodule and the flow water resistance fitting curve of the related element, evaluating and analyzing the optimal flow value based on the standard of whether the optimal flow value is larger than the minimum required value of pipeline flow, and obtaining an optimal pipeline distribution scheme;
reasonably distributing the arrangement positions of the elements and the water flow routes in the cooling system according to the optimal pipeline distribution scheme;
wherein the element comprises a water pump; the establishing of each parallel branch submodule according to the flow water resistance fitting curve of each element comprises:
analyzing the flow water resistance fitting curve of each element, and judging the water resistance of each element under the same flow;
dividing each element into a plurality of parallel branch sub-modules according to the principle that the difference value between the total water resistance of the elements in each parallel branch sub-module is within a preset range;
connecting the elements in each parallel branch submodule and connecting each parallel branch submodule with the water pump.
2. The vehicular cooling system piping distribution design method according to claim 1, wherein the components include at least two of a water pump, a four-in-one component, a motor controller component, a fuel-electric accessory component, and a motor component.
3. The method as set forth in claim 2, wherein the step of obtaining data parameters of the components required by the method comprises:
collecting the water resistance of the water pump at different flow rates when the water pump works to obtain parameters of the water pump;
collecting water resistance parameters of the four-in-one element under different flow rates;
collecting water resistance parameters of the motor controller element under different flow rates;
collecting water resistance parameters of the fuel accessory element under different flow rates;
collecting water resistance parameters of the motor element under different flow rates;
wherein, the water resistance parameter refers to the magnitude of pressure drop under different water flows.
4. The method of claim 2, wherein the step of establishing a flow-water resistance fit curve for each element according to the data parameters comprises:
converting the water resistance parameters of the four-in-one element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the four-in-one element;
converting water resistance parameters of the motor controller element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the motor controller element;
converting the water resistance parameters of the fuel-electric accessory element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the fuel-electric accessory element;
converting the water resistance parameters of the motor element into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the motor element;
and converting the water resistance parameters of the water pump into coordinate axis parameter data, and establishing a flow water resistance fitting curve of the water pump.
5. The method for designing pipeline distribution of a vehicular cooling system according to claim 1, wherein the step of collecting parameters of flow and water resistance of each parallel branch sub-module and establishing a fitting curve of flow and water resistance of each parallel branch sub-module comprises:
collecting flow and water resistance parameters of each parallel branch submodule;
and converting the water resistance parameters of the parallel branch submodules into coordinate axis parameter data, and establishing flow water resistance fitting curves of the parallel branch submodules.
6. The vehicular cooling system piping allocation design method according to claim 1, wherein the step of calculating an optimal flow value of each parallel branch submodule by combining the flow water resistance fitting curve of each parallel branch submodule and the flow water resistance fitting curve of the relevant element, performing evaluation analysis based on a criterion whether the optimal flow value is greater than a minimum required value of the piping flow, and obtaining an optimal piping allocation plan comprises:
respectively combining the flow water resistance fitting curve of each parallel branch sub-module with the flow water resistance fitting curve of the water pump;
calculating the optimal flow value of each parallel branch submodule;
comparing the optimal flow value of each parallel branch submodule with the minimum flow value of the parallel branch submodule, and evaluating and analyzing;
and obtaining an optimal pipeline distribution scheme according to the analysis result.
7. A vehicular cooling system characterized in that a line distribution design is performed according to the vehicular cooling system line distribution design method of any one of claims 1 to 6, the system comprising: the cooling module, the expansion water tank, the water pump, the first parallel branch submodule and the second parallel branch submodule are connected in parallel;
the cooling module is connected with the expansion water tank and the water pump; the water pump is connected with the first parallel branch submodule and the second parallel branch submodule, and drives cooling liquid to pass through the first parallel branch submodule and the second parallel branch submodule and complete circulation in the cooling system.
8. The vehicular cooling system according to claim 7, wherein the first parallel branch submodule comprises a four-in-one element and an electric machine element; the second parallel branch submodule includes a motor controller element and a fuel-electric accessory element.
9. The vehicular cooling system according to claim 8, wherein in the first parallel branch submodule, the four-in-one element is disposed at an end of the electric motor element close to the water pump;
in the second parallel branch submodule, the motor controller element is disposed at an end of the fuel accessory element near the water pump.
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