CN114595520A - Simulation arrangement structure and analysis method for gearbox cooling system - Google Patents
Simulation arrangement structure and analysis method for gearbox cooling system Download PDFInfo
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- 238000001816 cooling Methods 0.000 title claims abstract description 136
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Abstract
The invention provides a simulation arrangement structure and an analysis method of a gearbox cooling system, wherein the simulation arrangement structure comprises a plurality of simulation arrangement points, and the arrangement points are respectively arranged on a water inlet pipe and a water outlet pipe of a radiator of the gearbox cooling system, so that the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the radiator are detected; the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox of the gearbox cooling system are detected; the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly of the gearbox cooling system are detected; by adopting the scheme, the difference between the theoretical simulation design and the finished automobile acceptance test result can be reduced, so that the theoretical simulation design is closer to the finished automobile test with higher precision.
Description
Technical Field
The invention belongs to the technical field of gearbox cooling system simulation, and particularly relates to a gearbox cooling system simulation arrangement structure and an analysis method.
Background
With the promotion of the national policy of double points and carbon emission, hybrid vehicles and electric vehicles occupy the main automobile market, and compared with the battery technology of pure electric vehicles and the problem of charging piles, the hybrid vehicles are increasingly mature in technology, the holding capacity is continuously increased, and the high demand on the gearbox is naturally increased.
Therefore, the integration of an electric drive system and the cooling and lubrication of a multi-gear transmission are great challenges for the electromotion, and particularly, the simulation, the safety and the stability need to be jointly attacked and difficultly overcome by the whole industry; most of the existing cooling system designs in the early stage of automobile design and manufacture rely on theoretical simulation, although theoretical simulation provides guidance for later-stage whole automobile tests, certain deviation still exists after a large number of whole automobile tests are verified, so that during early-stage design, simulation engineers give margins before simulation results are output, margins given by different engineers have deviation, and the theoretical simulation results lose rigor.
Based on the technical problems existing in the automobile design process, no relevant solution is provided; there is therefore a pressing need to find effective solutions to the above problems.
Disclosure of Invention
The invention aims to provide a simulation arrangement structure and an analysis method of a gearbox cooling system aiming at the defects in the prior art, and aims to solve the problem of simulation test of the gearbox cooling system in the existing automobile design process.
The invention provides a simulation arrangement structure of a gearbox cooling system, which comprises a plurality of simulation arrangement points, wherein the simulation arrangement points comprise a first arrangement point, a second arrangement point, a third arrangement point, a fourth arrangement point, a fifth arrangement point and a sixth arrangement point; the first arrangement point is arranged on a water inlet pipe of a radiator of the gearbox cooling system, and the second arrangement point is arranged on a water outlet pipe of the radiator of the gearbox cooling system, so that the water temperature and water flow of the water inlet pipe and the water outlet pipe of the radiator are detected; the third arrangement point is arranged on a water inlet pipe of a hybrid gearbox of the gearbox cooling system, and the fourth arrangement point is arranged on a water outlet pipe of the hybrid gearbox of the gearbox cooling system, so that the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox are detected; the fifth arrangement point is arranged on a water inlet pipe of an automatic air-conditioning HVAC assembly of the gearbox cooling system, and the sixth arrangement point is arranged on a water outlet pipe of the automatic air-conditioning HVAC assembly of the gearbox cooling system, so that the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly are detected.
Furthermore, a temperature sensor and a flow sensor are arranged on each arrangement point; respectively acquiring the water temperatures of a water inlet pipe and a water outlet pipe of a radiator, the water temperatures of a water inlet pipe and a water outlet pipe of a hybrid gearbox and the water temperatures of a water inlet pipe and a water outlet pipe of an automatic air-conditioning HVAC assembly through temperature sensors of various simulation arrangement points; and/or collecting the water flow of a water inlet pipe and a water outlet pipe of the radiator, the water flow of a water inlet pipe and a water outlet pipe of the hybrid gearbox and the water flow of a water inlet pipe and a water outlet pipe of the automatic air-conditioning HVAC assembly through flow sensors of all the simulation arrangement points respectively.
Further, the gearbox cooling system comprises a radiator, a cooling fan, a hybrid gearbox, an automatic air-conditioning HVAC assembly, a mechanical water pump, an engine assembly and an expansion tank assembly; a water inlet pipe of the radiator is communicated with a water inlet of a thermostat of the engine assembly, and a water outlet pipe of the radiator is communicated with a water outlet of the thermostat of the engine assembly; the water inlet pipe of the hybrid gearbox is communicated with the water inlet pipe of the radiator through a three-way valve, and the water outlet pipe of the hybrid gearbox is communicated with the water outlet pipe of the radiator through the three-way valve so as to be communicated with the thermostat; a water outlet pipe of the mechanical water pump is communicated with a water inlet of the engine assembly, and a water inlet pipe of the mechanical water pump is communicated with a water outlet of the thermostat; the water outlet pipe of the automatic air-conditioning HVAC assembly is communicated with the water inlet pipe of the mechanical water pump, and the water inlet pipe of the automatic air-conditioning HVAC assembly is communicated with the water outlet of the thermostat; the cooling fan is arranged on the side edge of the radiator and used for radiating heat of the radiator; the expansion tank assembly is also communicated with the radiator and the thermostat respectively.
Further, the hybrid transmission case is a DHT hybrid transmission case; in a gearbox cooling system, cooling liquid flowing out of an engine assembly flows into a DHT hybrid gearbox through a three-way valve, the cooling liquid flows into the engine assembly again after being heated by the DHT hybrid gearbox, and the cooling liquid in the engine assembly is uniformly cooled by a radiator under the drive of a mechanical water pump; in this cycle, the DHT hybrid transmission cooling system is branched into a high-temperature cooling system and participates in the high-temperature cooling system cycle.
Correspondingly, the invention also provides a simulation analysis method of the gearbox cooling system, which comprises the following processes:
s1: arranging simulation arrangement points of a gearbox cooling system, and respectively detecting the water temperature and the water flow of a water inlet pipe and a water outlet pipe of a radiator of the gearbox cooling system, the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox, and the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly;
s2: confirming the simulation working condition of the whole vehicle, and calculating the collected water temperatures of a water inlet pipe and a water outlet pipe of a radiator, the water temperatures of a water inlet pipe and a water outlet pipe of a hybrid gearbox and the water temperatures of a water inlet pipe and a water outlet pipe of an HVAC assembly of an automatic air conditioner according to heat to obtain the heat exchange quantity Q1 of the radiator;
s3: building a simulation model by using simulation arrangement points of the cooling system of the gearbox arranged in the S, and checking the simulation model by using the simulation working condition of the whole vehicle and the flow of the cooling water pipe as input boundaries of simulation software; setting a plurality of CASE and Run Starup which are the same as the simulation working conditions in simulation software CASE, and checking the temperature of inlet and outlet water of the radiator in Vise Results to obtain the heat exchange quantity Q2 of the radiator;
s4: calculating and comparing heat according to the following formula to obtain an average benchmarking coefficient A;
q1= C Δ T; q1= a × Q2; wherein C is the specific heat capacity; Δ T is the temperature difference; m is a mass flow;
s5: and (5) testing and accepting the finished automobile temperature field.
Further, in step S1, the arranging the simulated arrangement points of the cooling system of the transmission includes:
s11: arranging the first arrangement point on a water inlet pipe of a radiator of a gearbox cooling system, and arranging the second arrangement point on a water outlet pipe of the radiator of the gearbox cooling system, so as to detect the water temperature and water flow of the water inlet pipe and the water outlet pipe of the radiator;
s12: arranging the third arrangement point on a water inlet pipe of a hybrid gearbox of a gearbox cooling system, and arranging the fourth arrangement point on a water outlet pipe of the hybrid gearbox of the gearbox cooling system, so as to detect the water temperature and water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox;
s13: and arranging the fifth arrangement point on a water inlet pipe of an automatic air-conditioning HVAC assembly of the gearbox cooling system, and arranging the sixth arrangement point on a water outlet pipe of the automatic air-conditioning HVAC assembly of the gearbox cooling system, so as to detect the water temperature and water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly.
Further, in the step S2, the water temperatures of the radiator water inlet pipe and the radiator water outlet pipe, the water temperatures of the hybrid transmission case water inlet pipe and the radiator water outlet pipe, and the water temperatures of the automatic air-conditioning HVAC assembly water inlet pipe and the radiator water outlet pipe are respectively collected through the temperature sensors of the respective simulation arrangement points; and/or acquiring the water flow of a water inlet pipe and a water outlet pipe of the radiator, the water flow of a water inlet pipe and a water outlet pipe of the hybrid gearbox and the water flow of a water inlet pipe and a water outlet pipe of the HVAC assembly of the automatic air conditioner through flow sensors of various simulation arrangement points respectively.
Further, in the step S2, collecting the temperature and flow information of the cooling water pipe under each working condition with reference to the test standard of the temperature field of the entire vehicle; in step S3, CASE and Run Starup are set to be the same as the simulated conditions.
Further, the gearbox cooling system comprises a radiator, a cooling fan, a hybrid gearbox, an automatic air-conditioning HVAC assembly, a mechanical water pump, an engine assembly and an expansion tank assembly; a water inlet pipe of the radiator is communicated with a water inlet of a thermostat of the engine assembly, and a water outlet pipe of the radiator is communicated with a water outlet of the thermostat of the engine assembly; the water inlet pipe of the hybrid transmission case is communicated with the water inlet pipe of the radiator through a three-way valve, and the water outlet pipe of the hybrid transmission case is communicated with the water outlet pipe of the radiator through the three-way valve so as to be communicated with the thermostat; a water outlet pipe of the mechanical water pump is communicated with a water inlet of the engine assembly, and a water inlet pipe of the mechanical water pump is communicated with a water outlet of the thermostat; the water outlet pipe of the automatic air-conditioning HVAC assembly is communicated with the water inlet pipe of the mechanical water pump, and the water inlet pipe of the automatic air-conditioning HVAC assembly is communicated with the water outlet of the thermostat; the cooling fan is arranged on the side edge of the radiator and used for radiating heat of the radiator; the expansion tank assembly is also communicated with the radiator and the thermostat respectively.
Further, the hybrid transmission case is a DHT hybrid transmission case; in a gearbox cooling system, cooling liquid flowing out of an engine assembly flows into a DHT hybrid gearbox through a three-way valve, the cooling liquid flows into the engine assembly again after being heated by the DHT hybrid gearbox, and the cooling liquid in the engine assembly is uniformly cooled by a radiator under the drive of a mechanical water pump; in this cycle, the DHT hybrid transmission cooling system is branched into a high-temperature cooling system and participates in the high-temperature cooling system cycle.
The invention also provides a scheme that a manual sample vehicle is provided with a temperature sensor (T) and a flow sensor (Q) according to the test requirements of the temperature field of the whole vehicle, different working conditions of the whole vehicle are simulated, the water temperature and water flow of a Radiator (RAD) inlet/outlet pipe, a DHT gearbox inlet/outlet pipe and a warm air (HVAC) inlet/outlet pipe are collected and used as the boundary input conditions of simulation software, a plurality of (preferably 10) working conditions which are the same as those of the simulation are set in the simulation software CASE, the heat exchange quantity of the Radiator (RAD) under the working conditions of the whole vehicle and the simulation software simulation working conditions is aligned according to the law of energy conservation to obtain an average alignment coefficient A, the theoretical simulation analysis of a later-stage gearbox cooling system is guided, the resource waste caused by repeated simulation, test and improvement due to incomplete boundary information in the simulation early stage is avoided, and the verification is carried out on certain vehicle types in batches, and a benchmarking coefficient A is added during simulation, so that the accuracy of the whole vehicle acceptance test is improved by about 2%.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description.
The invention will be further explained with reference to the drawings, in which:
FIG. 1 is a schematic layout of a transmission cooling system according to the present invention;
fig. 2 is a schematic diagram of simulation carrying of a cooling system of a transmission according to the present invention.
In the figure: 1-Radiator (RAD); 2-cooling FAN (FAN); 3-a sensor; 4-three-way valves; 5-Thermostat (Thermostat); 6-hybrid transmission case (DHT); 7-an automatic air conditioning HVAC assembly; 8-mechanical water Pump (Pump); 9-Engine assembly (Engine); 10-expansion Tank assembly (Tank); 11-vehicle air inlet grille; 12-cold side heat sink (Rad-Slave); 13-air outlet in the vehicle cabin; 14-Cooling water Pipe (Pipe).
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 2, the present invention provides a simulation layout structure of a cooling system of a transmission, in particular to a layout structure of simulation detection points of a cooling system of an automobile transmission; specifically, the simulated arrangement structure comprises a plurality of simulated arrangement points, wherein the plurality of simulated arrangement points comprise a first arrangement point, a second arrangement point, a third arrangement point, a fourth arrangement point, a fifth arrangement point and a sixth arrangement point; the first arrangement point is arranged on a water inlet pipe of a radiator 1 of a gearbox cooling system and used for detecting the water temperature and water flow of the water inlet pipe of the radiator 1; the second arrangement point is arranged on a water outlet pipe of a radiator 1 of the gearbox cooling system and used for detecting the water temperature and water flow of the water outlet pipe of the radiator 1; namely, the first arrangement point is arranged on a water inlet pipe of a radiator 1 of a gearbox cooling system, and the second arrangement point is arranged on a water outlet pipe of the radiator 1 of the gearbox cooling system, so that the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the radiator 1 are detected; further, the third arrangement point is arranged on a water inlet pipe of a hybrid gearbox 6 of the gearbox cooling system, so that the water temperature and the water flow of the water inlet pipe of the hybrid gearbox 6 are detected; the fourth arrangement point is arranged on a water outlet pipe of a hybrid gearbox 6 of the gearbox cooling system, so that the water temperature and the water flow of the water outlet pipe of the hybrid gearbox 6 are detected; namely, the third arrangement point is arranged on the water inlet pipe of the hybrid gearbox 6 of the gearbox cooling system, and the fourth arrangement point is arranged on the water outlet pipe of the hybrid gearbox 6 of the gearbox cooling system, so that the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox 6 are detected; further, a fifth arrangement point is arranged on a water inlet pipe of an automatic air-conditioning HVAC assembly 7 of the gearbox cooling system and is used for detecting the water temperature and water flow of the water inlet pipe of the automatic air-conditioning HVAC assembly 7; the sixth arrangement point is arranged on a water outlet pipe of an automatic air-conditioning HVAC assembly 7 of the gearbox cooling system, and the water temperature and the water flow of the water outlet pipe of the automatic air-conditioning HVAC assembly 7 are detected; namely, the fifth arrangement point is arranged on a water inlet pipe of an automatic air-conditioning HVAC assembly 7 of the gearbox cooling system, and the sixth arrangement point is arranged on a water outlet pipe of the automatic air-conditioning HVAC assembly 7 of the gearbox cooling system, so that the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly 7 are detected; by adopting the simulation arrangement structure of the gearbox cooling system, the water temperature (DEG C) and the water flow (L/min) of the water inlet/outlet pipe of the Radiator (RAD), the water inlet/outlet pipe of the DHT gearbox and the water inlet/outlet pipe of the HVAC assembly of the automatic air conditioner can be collected and used as the boundary input conditions of the simulation software, 10 working conditions which are the same as the simulation are set in the CASE of the simulation software, the heat exchange amount of the Radiator (RAD) under the whole vehicle working condition and the simulation working condition of the simulation software is subjected to benchmarking according to thermal calculation to obtain the average benchmarking coefficient A, the theoretical simulation analysis of the gearbox cooling system in the later period is guided, the resource waste caused by repeated simulation, test and improvement due to the incomplete simulation boundary information in the early period is avoided, the benchmarking coefficient is added during simulation through verification on a certain batch of vehicle types, and the accuracy of the acceptance test of the whole vehicle is improved by about 2%.
Preferably, in combination with the above solutions, as shown in fig. 1 to 2, a sensor 3 is provided on each arrangement point, and the sensor 3 includes a temperature sensor and a flow sensor; specifically, the water temperatures of a water inlet pipe and a water outlet pipe of the radiator 1, the water temperatures of a water inlet pipe and a water outlet pipe of the hybrid gearbox 6 and the water temperatures of a water inlet pipe and a water outlet pipe of the automatic air-conditioning HVAC assembly 7 are respectively collected through temperature sensors of various simulation arrangement points; further, the water flow of the water inlet pipe and the water outlet pipe of the radiator 1, the water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox 6 and the water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly 7 are collected through the flow sensors of the various simulation arrangement points respectively.
Preferably, in combination with the above solution, as shown in fig. 1 to 2, the transmission cooling system includes a radiator 1, a cooling fan 2, a hybrid transmission 6, an automatic air conditioning HVAC assembly 7, a mechanical water pump 8, an engine assembly 9, and an expansion tank assembly 10; a water inlet pipe of the radiator 1 is communicated with a water inlet of a thermostat 5 of the engine assembly 9, and a water outlet pipe of the radiator 1 is communicated with a water outlet of the thermostat 5 of the engine assembly 9; a water inlet pipe of the hybrid gearbox 6 is communicated with a water inlet pipe of the radiator 1 through a three-way valve 4, and a water outlet pipe of the hybrid gearbox 6 is communicated with a water outlet pipe of the radiator 1 through the three-way valve 4 so as to be communicated with the thermostat 5; a water outlet pipe of the mechanical water pump 8 is communicated with a water inlet of the engine assembly 9, and a water inlet pipe of the mechanical water pump 8 is communicated with a water outlet of the thermostat 5; a water outlet pipe of the automatic air-conditioning HVAC assembly 7 is communicated with a water inlet pipe of the mechanical water pump 8, and the water inlet pipe of the automatic air-conditioning HVAC assembly 7 is communicated with a water outlet of the thermostat 5; the cooling fan 2 is arranged on the side edge of the radiator 1 and used for radiating heat of the radiator 1; the expansion tank assembly 10 is also in communication with the radiator 1 and the thermostat 5, respectively.
Preferably, in combination with the above schemes, as shown in fig. 1 to 2, in this embodiment, the hybrid transmission 6 is taken as an example of a DHT hybrid transmission; in a gearbox cooling system, cooling liquid flowing out of an engine assembly 9 flows into a DHT hybrid gearbox through a three-way valve 4, the cooling liquid flows into the engine assembly 9 again after being heated through the DHT hybrid gearbox, and the cooling liquid in the engine assembly 9 is uniformly cooled through a radiator 1 under the drive of a mechanical water pump 8; in this cycle, the DHT hybrid transmission cooling system is branched into a high-temperature cooling system and participates in the high-temperature cooling system cycle.
The invention provides a simulation arrangement structure of a gearbox cooling system, which can be matched with a simulation matching method of the gearbox cooling system, so that the parameter detection of water temperature and water flow is carried out on the automobile design, the actual working condition of the whole automobile is simulated, the average benchmarking coefficient A between the working condition of the whole automobile and the simulation design is found, the difference between the theoretical simulation design and the test result of the acceptance of the whole automobile can be reduced, and the theoretical simulation design is closer to the whole automobile test with higher precision.
Correspondingly, in combination with the above solutions, as shown in fig. 1 to 2, the present invention further provides a simulation analysis method for a transmission cooling system, wherein the simulation analysis method specifically adopts the above transmission cooling system simulation arrangement structure, so as to realize detection of water temperature and water flow; specifically, the simulation analysis method includes the following processes:
s1: arranging simulation arrangement points of a gearbox cooling system, and respectively detecting the water temperature and the water flow of a water inlet pipe and a water outlet pipe of a gearbox cooling system radiator 1, the water temperature and the water flow of a water inlet pipe and a water outlet pipe of a hybrid gearbox 6 and the water temperature and the water flow of a water inlet pipe and a water outlet pipe of an automatic air-conditioning HVAC assembly 7;
s2: confirming the simulation working condition of the whole vehicle, and calculating the collected water temperatures of a water inlet pipe and a water outlet pipe of the radiator 1, the water temperatures of a water inlet pipe and a water outlet pipe of the hybrid gearbox 6 and the water temperatures of a water inlet pipe and a water outlet pipe of the automatic air-conditioning HVAC assembly 7 according to heat to obtain the heat exchange quantity Q1 of the radiator 1; wherein, the heat exchange quantity Q1 is obtained by a law formula of conservation of source energy: q1 (heat) = C (specific heat capacity) × M (mass flow) × T (temperature difference); namely, the heat exchange quantity Q1 is a theoretical calculation calorific value;
s3: referring to a cooling system layout schematic diagram 1, building a simulation model by using simulation layout points of a gearbox cooling system arranged in S1, and checking the simulation model by using the whole vehicle simulation working condition and the flow of a cooling water pipe as input boundaries of simulation software; setting a plurality of CASEs with the same simulation working condition and Run Start in simulation software CASE, and checking the temperature of inlet and outlet water of the radiator in Vise Results to obtain the heat exchange quantity Q2 of the radiator 1; specifically, the heat exchange quantity Q2 is calculated by simulation software GT-Suite according to energy conservation, and the simulation result is really close to the test verification of the whole vehicle; the simulation software is linear calculation, and a desired result under each whole vehicle working condition can be obtained; specifically, the Q2 result is more accurate compared with the Q1 result, the heat can be calculated only by theoretical calculation according to the existing boundary conditions, the simulation calculation can be understood as linear calculation, the working conditions are more, and the result is more accurate; if true =0.85 × theoretical calculation, even for the scaling factor a;
s4: calculating and comparing heat according to the following formula to obtain an average benchmarking coefficient A;
q1= C Δ T; wherein Q1= a × Q2; c is the specific heat capacity; Δ T is the temperature difference; m is a mass flow;
s5: and (3) checking and accepting the whole vehicle temperature field test, and in the whole vehicle temperature field check and acceptance test, the simulation result is improved by 2% compared with the simulation accuracy without calibration after the average calibration coefficient A is calibrated.
Preferably, in combination with the above solutions, as shown in fig. 1 to 2, in the step S1, the arranging the simulated arrangement points of the transmission cooling system includes:
s11: arranging the first arrangement point on a water inlet pipe of a radiator 1 of a gearbox cooling system, and arranging the second arrangement point on a water outlet pipe of the radiator 1 of the gearbox cooling system, so as to detect the water temperature and water flow of the water inlet pipe and the water outlet pipe of the radiator 1;
s12: arranging the third arrangement point on a water inlet pipe of a hybrid gearbox 6 of a gearbox cooling system, and arranging the fourth arrangement point on a water outlet pipe of the hybrid gearbox 6 of the gearbox cooling system, so as to detect the water temperature and water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox 6;
s13: and arranging the fifth arrangement point on a water inlet pipe of the automatic air-conditioning HVAC assembly 7 of the gearbox cooling system, and arranging the sixth arrangement point on a water outlet pipe of the automatic air-conditioning HVAC assembly 7 of the gearbox cooling system, so as to detect the water temperature and water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly 7.
Preferably, in combination with the above solutions, as shown in fig. 1 to 2, in step S2, the water temperatures of the water inlet pipe and the water outlet pipe of the radiator 1, the water temperatures of the water inlet pipe and the water outlet pipe of the hybrid transmission case 6, and the water temperatures of the water inlet pipe and the water outlet pipe of the automatic air conditioning HVAC assembly 7 are respectively collected by the temperature sensors at each simulation arrangement point; further, the water flow of the water inlet pipe and the water outlet pipe of the radiator 1, the water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox 6 and the water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly 7 are collected through the flow sensors of the various simulation arrangement points respectively.
Preferably, with the above scheme, as shown in fig. 1 to 2, in the step S2, the temperature and flow information of the cooling water pipe under 10 working conditions is acquired with reference to the test standard of the temperature field of the entire vehicle; further, in the step S3, 10 CASEs and Run starts that are the same as the simulated conditions are set, and the temperature (° c) of the inlet and outlet water of the radiator is found in the Vise Results, so as to obtain the heat exchange amount Q2 of the radiator 1 (RAD).
Preferably, in combination with the above solution, as shown in fig. 1 to 2, the transmission cooling system includes a radiator 1, a cooling fan 2, a hybrid transmission 6, an automatic air conditioning HVAC assembly 7, a mechanical water pump 8, an engine assembly 9, and an expansion tank assembly 10; a water inlet pipe of the radiator 1 is communicated with a water inlet of a thermostat 5 of the engine assembly 9, and a water outlet pipe of the radiator 1 is communicated with a water outlet of the thermostat 5 of the engine assembly 9; a water inlet pipe of the hybrid gearbox 6 is communicated with a water inlet pipe of the radiator 1 through a three-way valve 4, and a water outlet pipe of the hybrid gearbox 6 is communicated with a water outlet pipe of the radiator 1 through the three-way valve 4 so as to be communicated with the thermostat 5; a water outlet pipe of the mechanical water pump 8 is communicated with a water inlet of the engine assembly 9, and a water inlet pipe of the mechanical water pump 8 is communicated with a water outlet of the thermostat 5; a water outlet pipe of the automatic air-conditioning HVAC assembly 7 is communicated with a water inlet pipe of the mechanical water pump 8, and the water inlet pipe of the automatic air-conditioning HVAC assembly 7 is communicated with a water outlet of the thermostat 5; the cooling fan 2 is arranged on the side edge of the radiator 1 and used for radiating heat of the radiator 1; the expansion tank assembly 10 is also in communication with the radiator 1 and the thermostat 5, respectively.
Preferably, in combination with the above scheme, referring to a cooling system layout schematic diagram 1 and a built simulation model 2, a cold-side radiator 12 is a cooling FAN (FAN) 2 and is arranged between a finished automobile air inlet grille 11 and an air outlet 13 in an finished automobile cabin, the radiator 1 is further communicated with a Thermostat (Thermostat) 5 through a cooling water pipe 14, and the Thermostat (Thermostat) 5 is communicated with a mechanical water Pump (Pump) 8 through a cooling water pipe.
Preferably, in combination with the above scheme, as shown in fig. 1 to 2, in the present embodiment, the hybrid transmission 6 is a DHT hybrid transmission; in a gearbox cooling system, cooling liquid flowing out of an engine assembly 9 flows into a DHT hybrid gearbox through a three-way valve 4, the cooling liquid flows into the engine assembly 9 again after being heated through the DHT hybrid gearbox, and the cooling liquid in the engine assembly 9 is uniformly cooled through a radiator 1 under the drive of a mechanical water pump 8; in this cycle, the DHT hybrid transmission cooling system is branched into a high-temperature cooling system and participates in the high-temperature cooling system cycle.
The invention also provides a simulation analysis method of the gearbox cooling system, which simulates the actual working condition of the whole vehicle, finds the average benchmarking coefficient A between the working condition of the whole vehicle and the simulation design, can reduce the difference between the theoretical simulation design and the test result of acceptance of the whole vehicle, enables the theoretical simulation design to be closer to the test of the whole vehicle with higher precision, and can effectively improve the accuracy by about 2 percent on the basis of the theoretical simulation design.
The invention also provides a scheme that a manual sample vehicle is provided with a temperature sensor (T) and a flow sensor (Q) according to the test requirements of the temperature field of the whole vehicle, different working conditions of the whole vehicle are simulated, the water temperature and water flow of a Radiator (RAD) inlet/outlet pipe, a DHT gearbox inlet/outlet pipe and a warm air (HVAC) inlet/outlet pipe are collected and used as the boundary input conditions of simulation software, a plurality of (preferably 10) working conditions which are the same as those of the simulation are set in the simulation software CASE, the heat exchange quantity of the Radiator (RAD) under the working conditions of the whole vehicle and the simulation software simulation working conditions is aligned according to the law of energy conservation to obtain an average alignment coefficient A, the theoretical simulation analysis of a later-stage gearbox cooling system is guided, the resource waste caused by repeated simulation, test and improvement due to incomplete boundary information in the simulation early stage is avoided, and the verification is carried out on certain vehicle types in batches, and a benchmarking coefficient A is added during simulation, so that the accuracy of the whole vehicle acceptance test is improved by about 2%.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (10)
1. A transmission cooling system simulated arrangement comprising a plurality of simulated arrangement points, said plurality of simulated arrangement points comprising a first arrangement point, a second arrangement point, a third arrangement point, a fourth arrangement point, a fifth arrangement point, and a sixth arrangement point; the first arrangement point is arranged on a water inlet pipe of a radiator (1) of the gearbox cooling system, and the second arrangement point is arranged on a water outlet pipe of the radiator (1) of the gearbox cooling system, so that the water temperature and water flow of the water inlet pipe and the water outlet pipe of the radiator (1) are detected; the third arrangement point is arranged on a water inlet pipe of a hybrid gearbox (6) of a gearbox cooling system, and the fourth arrangement point is arranged on a water outlet pipe of the hybrid gearbox (6) of the gearbox cooling system, so that the water temperature and water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox (6) are detected; the fifth arrangement point is arranged on a water inlet pipe of an automatic air-conditioning HVAC assembly (7) of the gearbox cooling system, and the sixth arrangement point is arranged on a water outlet pipe of the automatic air-conditioning HVAC assembly (7) of the gearbox cooling system, so that the water temperature and the water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly (7) are detected.
2. A gearbox cooling system according to claim 1, characterised in that a temperature sensor and a flow sensor are provided at each deployment point; the water temperatures of a water inlet pipe and a water outlet pipe of the radiator (1), the water temperatures of a water inlet pipe and a water outlet pipe of the hybrid gearbox (6) and the water temperatures of a water inlet pipe and a water outlet pipe of the automatic air-conditioning HVAC assembly (7) are respectively collected through temperature sensors of various simulation arrangement points; and/or the water flow of the water inlet pipe and the water outlet pipe of the radiator (1), the water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox (6) and the water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly (7) are acquired through the flow sensors of all the simulation arrangement points respectively.
3. Gearbox cooling system according to claim 1, characterised in that it comprises a radiator (1), a cooling fan (2), a hybrid gearbox (6), an automatic air conditioning HVAC assembly (7), a mechanical water pump (8), an engine assembly (9) and an expansion tank assembly (10); a water inlet pipe of the radiator (1) is communicated with a water inlet of a thermostat (5) of the engine assembly (9), and a water outlet pipe of the radiator (1) is communicated with a water outlet of the thermostat (5) of the engine assembly (9); a water inlet pipe of the hybrid gearbox (6) is communicated with a water inlet pipe of the radiator (1) through a three-way valve (4), and a water outlet pipe of the hybrid gearbox (6) is communicated with a water outlet pipe of the radiator (1) through the three-way valve (4) so as to be communicated with the thermostat (5); a water outlet pipe of the mechanical water pump (8) is communicated with a water inlet of the engine assembly (9), and a water inlet pipe of the mechanical water pump (8) is communicated with a water outlet of the thermostat (5); a water outlet pipe of the automatic air-conditioning HVAC assembly (7) is communicated with a water inlet pipe of the mechanical water pump (8), and a water inlet pipe of the automatic air-conditioning HVAC assembly (7) is communicated with a water outlet of the thermostat (5); the cooling fan (2) is arranged on the side edge of the radiator (1) and used for radiating the radiator (1); the expansion tank assembly (10) is also respectively communicated with the radiator (1) and the thermostat (5).
4. Gearbox cooling system according to claim 3, characterised in that the hybrid gearbox (6) is a DHT hybrid gearbox; in the gearbox cooling system, cooling liquid flowing out of the engine assembly (9) flows into a DHT (hybrid dynamic pressure transmission) box through a three-way valve (4), the cooling liquid flows into the engine assembly (9) again after being heated by the DHT cooling liquid, and the cooling liquid in the engine assembly (9) is uniformly cooled by the radiator (1) under the drive of the mechanical water pump (8); in this cycle, the DHT hybrid transmission cooling system is a branch of the high-temperature cooling system and participates in the circulation of the high-temperature cooling system.
5. A simulation analysis method for a gearbox cooling system is characterized by comprising the following processes:
s1: arranging simulation arrangement points of a gearbox cooling system, and respectively detecting the water temperature and the water flow of a water inlet pipe and a water outlet pipe of a gearbox cooling system radiator (1), the water temperature and the water flow of a water inlet pipe and a water outlet pipe of a hybrid gearbox (6) and the water temperature and the water flow of a water inlet pipe and a water outlet pipe of an automatic air-conditioning HVAC assembly (7);
s2: confirming the simulation working condition of the whole vehicle, and calculating the collected water temperatures of a water inlet pipe and a water outlet pipe of the radiator (1), the water temperatures of the water inlet pipe and the water outlet pipe of the hybrid gearbox (6) and the water temperatures of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly (7) according to heat to obtain the heat exchange quantity Q1 of the radiator (1);
s3: building a simulation model by using simulation arrangement points of the gearbox cooling system arranged in the S1, and checking the simulation model by using the whole vehicle simulation working condition and the flow of the cooling water pipe as input boundaries of simulation software; setting a plurality of CASE and Run Starup which are the same as the simulation working conditions in simulation software CASE, and checking the temperature of inlet and outlet water of the radiator in Vise Results to obtain the heat exchange quantity Q2 of the radiator (1);
s4: calculating and comparing heat according to the following formula to obtain an average benchmarking coefficient A;
q1= C Δ T; q1= a × Q2; wherein C is the specific heat capacity; Δ T is the temperature difference; m is a mass flow;
s5: and (5) testing and accepting the finished automobile temperature field.
6. The method for simulation analysis of a cooling system of a transmission according to claim 5, wherein the step S1 is performed to arrange simulated arrangement points of the cooling system of the transmission including:
s11: arranging a first arrangement point on a water inlet pipe of a radiator (1) of a gearbox cooling system, and arranging a second arrangement point on a water outlet pipe of the radiator (1) of the gearbox cooling system, so as to detect the water temperature and water flow of the water inlet pipe and the water outlet pipe of the radiator (1);
s12: arranging the third arrangement point on a water inlet pipe of a hybrid gearbox (6) of a gearbox cooling system, and arranging the fourth arrangement point on a water outlet pipe of the hybrid gearbox (6) of the gearbox cooling system, so as to detect the water temperature and water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox (6);
s13: and arranging the fifth arrangement point on a water inlet pipe of an automatic air-conditioning HVAC assembly (7) of the gearbox cooling system, and arranging the sixth arrangement point on a water outlet pipe of the automatic air-conditioning HVAC assembly (7) of the gearbox cooling system, so as to detect the water temperature and water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly (7).
7. The simulation analysis method of the gearbox cooling system according to claim 5, wherein in the step S2, the water temperatures of the water inlet pipe and the water outlet pipe of the radiator (1), the water temperatures of the water inlet pipe and the water outlet pipe of the hybrid gearbox (6) and the water temperatures of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly (7) are respectively collected through the temperature sensors of the simulation arrangement points; and/or the water flow of the water inlet pipe and the water outlet pipe of the radiator (1), the water flow of the water inlet pipe and the water outlet pipe of the hybrid gearbox (6) and the water flow of the water inlet pipe and the water outlet pipe of the automatic air-conditioning HVAC assembly (7) are acquired through the flow sensors of all the simulation arrangement points respectively.
8. The simulation analysis method of the gearbox cooling system according to claim 7, wherein in the step S2, the temperature and flow information of the cooling water pipe under 10 working conditions is collected with reference to the test standard of the temperature field of the whole vehicle; in the step S3, 10 CASEs and Run Starup are set, which are the same as the simulated conditions.
9. The simulation analysis method of the gearbox cooling system according to claim 5, wherein the gearbox cooling system comprises a radiator (1), a cooling fan (2), a hybrid gearbox (6), an automatic air conditioning HVAC assembly (7), a mechanical water pump (8), an engine assembly (9) and an expansion tank assembly (10); a water inlet pipe of the radiator (1) is communicated with a water inlet of a thermostat (5) of the engine assembly (9), and a water outlet pipe of the radiator (1) is communicated with a water outlet of the thermostat (5) of the engine assembly (9); a water inlet pipe of the hybrid gearbox (6) is communicated with a water inlet pipe of the radiator (1) through a three-way valve (4), and a water outlet pipe of the hybrid gearbox (6) is communicated with a water outlet pipe of the radiator (1) through the three-way valve (4) so as to be communicated with the thermostat (5); a water outlet pipe of the mechanical water pump (8) is communicated with a water inlet of the engine assembly (9), and a water inlet pipe of the mechanical water pump (8) is communicated with a water outlet of the thermostat (5); a water outlet pipe of the automatic air-conditioning HVAC assembly (7) is communicated with a water inlet pipe of the mechanical water pump (8), and a water inlet pipe of the automatic air-conditioning HVAC assembly (7) is communicated with a water outlet of the thermostat (5); the cooling fan (2) is arranged on the side edge of the radiator (1) and used for radiating the radiator (1); the expansion tank assembly (10) is also respectively communicated with the radiator (1) and the thermostat (5).
10. The gearbox cooling system simulation analysis method according to claim 9, characterized in that the hybrid gearbox (6) is a DHT hybrid gearbox; in the gearbox cooling system, cooling liquid flowing out of the engine assembly (9) flows into a DHT (hybrid dynamic pressure transmission) box through a three-way valve (4), the cooling liquid flows into the engine assembly (9) again after being heated by the DHT cooling liquid, and the cooling liquid in the engine assembly (9) is uniformly cooled by the radiator (1) under the drive of the mechanical water pump (8); in this cycle, the DHT hybrid transmission cooling system is a branch of the high-temperature cooling system and participates in the circulation of the high-temperature cooling system.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116519065A (en) * | 2023-06-28 | 2023-08-01 | 江铃汽车股份有限公司 | Water flow test analysis method and system for heat management test radiator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116519065A (en) * | 2023-06-28 | 2023-08-01 | 江铃汽车股份有限公司 | Water flow test analysis method and system for heat management test radiator |
| CN116519065B (en) * | 2023-06-28 | 2023-09-26 | 江铃汽车股份有限公司 | Water flow test analysis method and system for heat management test radiator |
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