Heat balance test result correction method, system and device and storage medium

Abstract

The invention discloses a heat balance test result correction method, system and device and a storage medium, and belongs to the technical field of engineering machinery heat dissipation system testing. The method comprises the steps of obtaining operation data of equipment under a current working condition; calculating the total energy released by the engine and the output power of the engine under the current working condition according to the operation data; the corrected engine heat dissipation power is calculated based on the total energy released by the engine and the engine output power; and according to the operation data, the corrected heat dissipation power of the engine and pre-obtained reference heat dissipation power under the standard working condition, a corrected heat balance temperature value is calculated. According to the invention, the problem of inaccurate heat balance test results caused by test data errors can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering machinery heat dissipation system testing, and in particular relates to a thermal balance test result correction method, system, device and storage medium. Background Art

[0002] Due to the harsh working conditions of construction machinery, it is necessary to cover market conditions with the greatest probability during the design stage or prototype testing stage to ensure the accuracy of the design plan and test results, especially the test of heat dissipation capacity.

[0003] If the market conditions cannot be simulated, when the heat generated by the test conditions is lower than the market conditions, the test results will be inaccurate and the machine will be prone to high-temperature failure in the market. However, existing technologies cannot correct the test results of the cooling system of construction machinery. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a method, system, device and storage medium for correcting thermal balance test results, which can solve the problem of inaccurate thermal balance test results caused by test data errors.

[0005] The present invention provides the following technical solutions:

[0006] In a first aspect, a method for correcting thermal balance test results is provided, comprising: obtaining operating data of a device under current operating conditions;

[0007] Calculating the total energy released by the engine and the engine output power under the current operating conditions based on the operating data;

[0008] Calculating a corrected engine cooling power based on the total energy released by the engine and the engine output power;

[0009] The corrected heat balance temperature value is calculated based on the operating data, the corrected engine heat dissipation power and a pre-acquired reference heat dissipation power under standard operating conditions.

[0010] As an optional technical solution of the present invention, the operating data of the equipment under the current working conditions include the thermal efficiency of the engine, the cooling loss ratio, the fuel consumption, the fuel calorific value, the engine reference torque, the engine torque percentage, the friction torque percentage, the temperature values ​​of the radiator inlet and outlet water, and the engine speed.

[0011] As an optional technical solution of the present invention, the calculation of the total energy released by the engine and the engine output power under the current operating conditions based on the operating data includes:

[0012] Calculate the total energy released by the engine under current operating conditions , expressed as:

[0013] ;

[0014] in, Indicates fuel consumption, Indicates the calorific value of fuel oil;

[0015] Calculate the engine's cooling power under current operating conditions , expressed as:

[0016] ;

[0017] in, represents the cooling loss ratio, Indicates the sampling time;

[0018] Calculate the engine output power at any time , expressed as:

[0019] = ;

[0020] in, represents the engine speed at the i-th moment, It represents the engine output torque at the i-th moment, expressed as , represents the engine reference torque at the i-th moment, Indicates the percentage of engine torque, Indicates the friction torque percentage;

[0021] Calculate engine output power , expressed as:

[0022] ;

[0023] Where n represents the total time.

[0024] As an optional technical solution of the present invention, the calculation of the corrected engine heat dissipation power based on the total energy released by the engine and the engine output power includes:

[0025] The engine output power is calculated based on the engine output power , expressed as:

[0026] ;

[0027] in, Indicates the engine output power, Indicates the sampling time;

[0028] Calculate the heat dissipation power correction factor based on the total energy released by the engine , expressed as:

[0029] ;

[0030] in, represents the thermal efficiency of the engine, Indicates the total energy released by the engine;

[0031] The corrected engine heat dissipation power is expressed as:

[0032] ;

[0033] in, Indicates the engine cooling power.

[0034] As an optional technical solution of the present invention, the calculation of the corrected thermal equilibrium temperature value based on the operating data, the corrected engine heat dissipation power, and the pre-acquired reference heat dissipation power under standard operating conditions includes:

[0035] Calculate the difference between the inlet and outlet water temperatures of the radiator based on the operating data , expressed as:

[0036] ;

[0037] in, Indicates the radiator water inlet temperature value, Indicates the radiator outlet temperature value;

[0038] Calculate the heat dissipation difference value based on the corrected engine heat dissipation power and the reference heat dissipation power under standard working conditions , expressed as:

[0039] ;

[0040] in, Indicates the reference heat dissipation power under standard working conditions;

[0041] According to the difference in heat dissipation Calculate thermal equilibrium temperature correction value , expressed as:

[0042] ;

[0043] The corrected thermal equilibrium temperature value Expressed as:

[0044] .

[0045] In a second aspect, a thermal balance test result correction system is provided, comprising:

[0046] Data acquisition module, used to obtain the operating data of the equipment under the current working conditions;

[0047] The calculation module is used to calculate the total energy released by the engine and the engine output power under the current operating conditions based on the operating data; calculate the corrected engine heat dissipation power based on the total energy released by the engine and the engine output power; and calculate the corrected thermal equilibrium temperature value based on the operating data, the corrected engine heat dissipation power, and a pre-acquired reference heat dissipation power under the standard operating conditions.

[0048] In a third aspect, a device is provided, comprising: a memory, a processor, and a computer program;

[0049] The computer program is stored in the memory and is configured to be executed by the processor to implement the method described in the first aspect.

[0050] According to a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method described in the first aspect is implemented.

[0051] Compared with the prior art, the present invention has the following beneficial effects:

[0052] The thermal balance test result correction method provided by the present invention calculates the corrected engine heat dissipation power through the operating data of the equipment under the current working conditions, obtains the correction coefficient according to the ratio of the engine reference heat dissipation power and the corrected engine heat dissipation power, and obtains the thermal balance temperature of the theoretical working conditions by correcting the temperature difference between the inlet and outlet of the radiator, thereby solving the problem of inaccurate thermal balance test results caused by test data errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 4 is a flow chart of a method for correcting thermal balance test results in an embodiment of the present invention. DETAILED DESCRIPTION

[0054] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0055] Example 1

[0056] This embodiment provides a method for correcting thermal balance test results. Figure 1 As shown, the following steps are included:

[0057] Step 1: Obtain the operating data of the equipment under the current working conditions.

[0058] The operating data of the equipment under the current working conditions include the thermal efficiency of the engine, the cooling loss ratio, the fuel consumption, the fuel calorific value, the engine reference torque, the engine torque percentage, the friction torque percentage, the radiator inlet and outlet water temperature values, and the engine speed.

[0059] Of the energy generated by fuel combustion, a portion is used to produce indicated work, a proportion known as the engine's power output. The ratio of engine power output to the total energy generated by the consumed fuel is known as thermal efficiency. The remainder is lost as heat through the coolant and exhaust, known as heat loss. The portion removed by the coolant is known as engine heat dissipation. Under standard operating conditions, the engine's thermal efficiency and heat dissipation power are constant values ​​that can be measured through bench testing.

[0060] Step 2: Calculate the total energy released by the engine and the engine output power under the current working conditions based on the operating data.

[0061] Calculate the total energy released by the engine under current operating conditions , expressed as:

[0062] ;

[0063] in, Indicates fuel consumption, Indicates the calorific value of fuel.

[0064] Calculate the engine's cooling power under current operating conditions , expressed as:

[0065] ;

[0066] in, represents the cooling loss ratio, Indicates the sampling time.

[0067] Calculate the engine output power at any time , expressed as:

[0068] = ;

[0069] in, represents the engine speed at the i-th moment, It represents the engine output torque at the i-th moment, expressed as , represents the engine reference torque at the i-th moment, Indicates the percentage of engine torque, Indicates the friction torque percentage.

[0070] Calculate engine output power , expressed as:

[0071] ;

[0072] Where n represents the total time.

[0073] Step 3: Calculate the corrected engine heat dissipation power based on the total energy released by the engine and the engine output power.

[0074] Since the thermal efficiency of the engine is not fixed, in order to reduce the error in the calculation of the heat dissipation power, the calculated heat dissipation power needs to be corrected. When the effective output power ratio is lower than the theoretical thermal efficiency, the heat dissipation power needs to be increased, and vice versa.

[0075] The engine output power is calculated based on the engine output power , expressed as:

[0076] ;

[0077] in, Indicates the engine output power, Indicates the sampling time.

[0078] Calculate the heat dissipation power correction factor based on the total energy released by the engine , expressed as:

[0079] ;

[0080] in, represents the thermal efficiency of the engine, Indicates the total energy released by the engine.

[0081] The corrected engine heat dissipation power is expressed as:

[0082] ;

[0083] in, Indicates the engine cooling power.

[0084] Step 4: Calculate a corrected thermal equilibrium temperature value based on the operating data, the corrected engine heat dissipation power, and a pre-acquired reference heat dissipation power under standard operating conditions.

[0085] Calculate the difference between the inlet and outlet water temperatures of the radiator based on the operating data , expressed as:

[0086] ;

[0087] in, Indicates the radiator water inlet temperature value, Indicates the radiator outlet temperature.

[0088] Calculate the heat dissipation difference value based on the corrected engine heat dissipation power and the reference heat dissipation power under standard working conditions , expressed as:

[0089] ;

[0090] in, Indicates the reference heat dissipation power under standard working conditions.

[0091] According to the difference in heat dissipation Calculate thermal equilibrium temperature correction value , expressed as:

[0092] ;

[0093] The corrected thermal equilibrium temperature value Expressed as:

[0094] .

[0095] The following problems can be solved by the correction method:

[0096] (1) When the actual working conditions cannot reach the theoretical working conditions during the test, resulting in a low load during the test and the inability to reproduce the extreme working conditions, this method can be used to correct the test results so that the test results are closer to the theoretical working conditions.

[0097] (2) When comparing the performance of cooling system components by replacing a radiator or fan, the difference in average load rate between the two test results will affect the final thermal equilibrium temperature. Testers cannot precisely ensure that the average loads are exactly the same for both tests. In this case, a correction factor is obtained by comparing the engine cooling power of the two tests. This correction factor is used to correct the thermal equilibrium temperature before comparison, eliminating the impact of different cooling power on the test results.

[0098] Example 2

[0099] This embodiment provides a thermal balance test result correction system, including:

[0100] Data acquisition module, used to obtain the operating data of the equipment under the current working conditions;

[0101] The calculation module is used to calculate the total energy released by the engine and the engine output power under the current operating conditions based on the operating data; calculate the corrected engine heat dissipation power based on the total energy released by the engine and the engine output power; and calculate the corrected thermal equilibrium temperature value based on the operating data, the corrected engine heat dissipation power, and a pre-acquired reference heat dissipation power under the standard operating conditions.

[0102] Example 3

[0103] This embodiment provides a device, including: a memory, a processor, and a computer program;

[0104] The computer program is stored in the memory and is configured to be executed by the processor to implement the method described in embodiment 1.

[0105] Example 4

[0106] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method described in Embodiment 1 is implemented.

[0107] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0108] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0109] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0110] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0111] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for correcting thermal balance test results, characterized in that: include: Obtain the operating data of the equipment under the current working conditions; Calculating the total energy released by the engine and the engine output power under the current operating conditions based on the operating data; Calculating a corrected engine cooling power based on the total energy released by the engine and the engine output power; The corrected heat balance temperature value is calculated based on the operating data, the corrected engine heat dissipation power and a pre-acquired reference heat dissipation power under standard operating conditions.

2. The thermal balance test result correction method according to claim 1, characterized in that: The operating data of the equipment under the current working conditions include the thermal efficiency of the engine, the cooling loss ratio, the fuel consumption, the fuel calorific value, the engine reference torque, the engine torque percentage, the friction torque percentage, the radiator inlet and outlet water temperature values, and the engine speed.

3. The thermal balance test result correction method according to claim 2, characterized in that: Calculating the total energy released by the engine and the engine output power under the current operating conditions based on the operating data includes: Calculate the total energy released by the engine under current operating conditions , expressed as: ； in, Indicates fuel consumption, Indicates the calorific value of fuel oil; Calculate the engine's cooling power under current operating conditions , expressed as: ； in, represents the cooling loss ratio, Indicates the sampling time; Calculate the engine output power at any time , expressed as: = ； in, represents the engine speed at the i-th moment, It represents the engine output torque at the i-th moment, expressed as , represents the engine reference torque at the i-th moment, Indicates the percentage of engine torque, Indicates the friction torque percentage; Calculate engine output power , expressed as: ； Where n represents the total time.

4. The thermal balance test result correction method according to claim 3, characterized in that: The calculation of the corrected engine heat dissipation power based on the total energy released by the engine and the engine output power includes: The engine output power is calculated based on the engine output power , expressed as: ； in, Indicates the engine output power, Indicates the sampling time; Calculate the heat dissipation power correction factor based on the total energy released by the engine , expressed as: ； in, represents the thermal efficiency of the engine, Indicates the total energy released by the engine; The corrected engine heat dissipation power is expressed as: ； in, Indicates the engine cooling power.

5. The thermal balance test result correction method according to claim 4, characterized in that: Calculating the corrected thermal equilibrium temperature value based on the operating data, the corrected engine heat dissipation power, and the pre-acquired reference heat dissipation power under standard operating conditions includes: Calculate the difference between the inlet and outlet water temperatures of the radiator based on the operating data , expressed as: ； in, Indicates the radiator water inlet temperature value, Indicates the radiator outlet temperature value; Calculate the heat dissipation difference value based on the corrected engine heat dissipation power and the reference heat dissipation power under standard working conditions , expressed as: ； in, Indicates the reference heat dissipation power under standard working conditions; According to the difference in heat dissipation Calculate thermal equilibrium temperature correction value , expressed as: ； The corrected thermal equilibrium temperature value Expressed as: 。 6. A thermal balance test result correction system, characterized in that: include: Data acquisition module, used to obtain the operating data of the equipment under the current working conditions; a calculation module, configured to calculate the total energy released by the engine and the engine output power under the current operating conditions based on the operating data; Calculating a corrected engine cooling power based on the total energy released by the engine and the engine output power; The corrected heat balance temperature value is calculated based on the operating data, the corrected engine heat dissipation power and a pre-acquired reference heat dissipation power under standard operating conditions.

7. A device, characterized in that include: memory, processors, and computer programs; The computer program is stored in the memory and configured to be executed by the processor to implement the method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that A computer program is stored thereon, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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