CN112284718A - Transmission cold-hot impact test device and method and computer equipment - Google Patents
Transmission cold-hot impact test device and method and computer equipment Download PDFInfo
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- CN112284718A CN112284718A CN201910631349.8A CN201910631349A CN112284718A CN 112284718 A CN112284718 A CN 112284718A CN 201910631349 A CN201910631349 A CN 201910631349A CN 112284718 A CN112284718 A CN 112284718A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009863 impact test Methods 0.000 title description 43
- 238000012360 testing method Methods 0.000 claims abstract description 324
- 230000035939 shock Effects 0.000 claims abstract description 181
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- 238000001816 cooling Methods 0.000 claims abstract description 45
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
本发明属于变速器技术领域，尤其涉及一种变速器冷热冲击试验装置、方法及计算机设备。该变速器冷热冲击试验装置包括压力控制模块、流量控制模块、温度控制模块、第一开关件和第二开关件；温度控制模块包括加热组件、冷却组件和温度传感器；加热组件、第一开关件、压力控制模块、流量控制模块和温度传感器与冷却器构成热冲击循环闭环；冷却组件、第二开关件、压力控制模块、流量控制模块和温度传感器与变速器的冷却器构成冷冲击循环闭环。本发明在热冲击试验和冷冲击试验中均可精确测量和控制进入变速器的冷却器中的循环水的进水压力、流量、温度，提升了试验结果精准度；且本发明结构简单，降低了试验成本，提升了集成度。
The invention belongs to the technical field of transmissions, and in particular relates to a transmission cold and thermal shock test device, method and computer equipment. The transmission thermal shock test device includes a pressure control module, a flow control module, a temperature control module, a first switch part and a second switch part; the temperature control module includes a heating component, a cooling component and a temperature sensor; the heating component, the first switch component , pressure control module, flow control module and temperature sensor and cooler form a closed loop of thermal shock cycle; cooling component, second switch element, pressure control module, flow control module and temperature sensor and cooler of transmission form a closed loop of cold shock cycle. The present invention can accurately measure and control the water inlet pressure, flow rate and temperature of the circulating water entering the cooler of the transmission in both the thermal shock test and the cold shock test, thereby improving the accuracy of the test results; and the present invention has a simple structure and reduces the Test cost, improve integration.
Description
Technical Field
The invention belongs to the technical field of transmissions, and particularly relates to a device and a method for testing cold and hot shock of a transmission and computer equipment.
Background
Currently, there is no effective way to conduct a cold thermal shock test on a transmission of a vehicle. Some that appear among the prior art carry out cold and hot shock test scheme to the radiator, it is long to arrange the pipeline in the cold and hot shock test device, the pressure of intaking that leads to getting into the circulating water in the radiator, flow, temperature etc., change at any time at the circulation in-process, and to the change of above-mentioned pressure, flow, temperature, current cold and hot shock test device does not have the ability that can effectively control its change, so, the test parameter that leads to getting into the circulating water in the radiator can not obtain guaranteeing, and then produce harmful effects to cold and hot shock test, and then lead to cold and hot shock test's test result inaccurate. And the structure of the existing cold and hot impact test device is complex, the integration level is low, the test cost is increased, and the test efficiency is low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problem that in the prior art, the test result of a cold and hot shock test is inaccurate because the water inlet pressure, the flow and the temperature of circulating water entering a cooler of a speed changer are changed at any time in the circulating process, a cold and hot shock test device and method of the speed changer and computer equipment are provided.
In order to solve the technical problem, in one aspect, an embodiment of the present invention provides a transmission cold-hot impact test apparatus, where a transmission includes a cooler, and the transmission cold-hot impact test apparatus includes a pressure control module, a flow control module, a temperature control module, a first switch and a second switch; the temperature control module comprises a heating assembly, a cooling assembly and a temperature sensor;
the heating assembly, the first switch piece, the pressure control module, the flow control module, the temperature sensor and the cooler form a thermal shock circulation closed loop; in the thermal shock cycle closed loop, the pressure control module, the flow control module and the temperature sensor are all positioned between the water outlet end of the heating assembly and the water inlet of the cooler; the first switch piece is used for controlling the thermal shock test of opening or closing the thermal shock cycle closed loop;
the cooling assembly, the second switch piece, the pressure control module, the flow control module, the temperature sensor and the cooler form a cold impact circulation closed loop; in the cold shock cycle closed loop, the pressure control module, the flow control module and the temperature sensor are all positioned between the water outlet end of the cooling assembly and the water inlet of the cooler; the second switch piece is used for controlling the cold shock test for opening or closing the cold shock cycle closed loop.
Optionally, the pressure control module comprises a pressure control valve and a pressure sensor, the pressure sensor being arranged between the pressure control valve and the water inlet of the cooler.
Optionally, the flow control module comprises a flow control valve and a flow sensor, the flow sensor being arranged between the flow control valve and the water inlet of the cooler.
Optionally, the heating assembly includes a heating mold temperature controller and a first variable frequency pump connected to the heating mold temperature controller; and/or
The cooling assembly comprises a cooling mold temperature controller and a second variable frequency pump connected with the cooling mold temperature controller.
Optionally, the first switch member comprises a first switch valve connected to the water outlet end of the heating assembly and a second switch valve connected to the water inlet end of the heating assembly; one end of the second switch valve, which is far away from the heating assembly, is connected with a water outlet of the cooler; and/or
The second switch piece comprises a third switch valve connected with the water outlet end of the cooling assembly and a fourth switch valve connected with the water inlet end of the cooling assembly; and one end of the fourth switch valve, which is far away from the cooling assembly, is connected with a water outlet of the cooler.
Optionally, the transmission cold-hot impact test device further comprises a first emptying part which is arranged in the thermal shock circulation closed loop and is used for emptying air in the thermal shock circulation closed loop; and/or
The cold and hot impact test device for the transmission further comprises a second emptying part which is arranged in the cold impact circulation closed loop and is used for emptying air in the cold impact circulation closed loop.
Optionally, the transmission cold-hot impact test device further comprises a first safety valve which is arranged in the thermal impact cycle closed loop and is connected with an external water tank; and/or
The cold and hot impact test device for the transmission further comprises a second safety valve which is arranged in the cold impact circulation closed loop and connected with an external water tank.
The cold and hot impact testing device for the transmission comprises a pressure control module, a flow control module, a temperature control module, a first switch piece and a second switch piece; the temperature control module comprises a heating component, a cooling component and a temperature sensor; the hot shock cycle closed loop for carrying out the hot shock test and the cold shock cycle closed loop for carrying out the cold shock test in the cold and hot shock test device of the transmission respectively and accurately measure and control the water inlet pressure, flow and temperature of circulating water entering a cooler of the transmission through a pressure control module, a flow control module and a temperature sensor; further, the test results of the cold impact test and the thermal impact test are accurate. In addition, the pressure control module, the flow control module and the temperature sensor are shared, so that a circulating pipeline of the cold and hot impact test device is reduced, the structure is simpler, the test cost is reduced, and the integration level is improved.
On the other hand, the embodiment of the invention also provides a cold and hot shock test method for the transmission, which is used for carrying out cold shock test and thermal shock test on the cold and hot shock test device for the transmission; the cold and hot shock test method for the transmission comprises the following steps:
receiving a thermal shock test starting instruction, controlling the first switch piece to be started after confirming that the second switch piece is closed, and adjusting thermal test parameters to be within a preset target thermal test parameter range; the thermal test parameters comprise a first water temperature in a thermal shock circulation closed loop measured by a temperature sensor, a first pressure in the thermal shock circulation closed loop measured by a pressure control module and a first flow measured by a flow control module;
receiving a cold impact test starting instruction, controlling a second switch piece to be started after confirming that a first switch piece is closed, and adjusting cold test parameters to be within a preset target cold test parameter range; the cold test parameters comprise a second water temperature in the cold shock circulation closed loop measured by the temperature sensor, a second pressure in the cold shock circulation closed loop measured by the pressure control module and a second flow measured by the flow control module.
Optionally, the pressure control module comprises a pressure control valve and a pressure sensor; the flow control module comprises a flow control valve and a flow sensor;
the adjusting of the thermal test parameters to the preset target thermal test parameter range includes:
controlling the temperature of the water outlet end of the heating assembly, and adjusting the first water temperature to be within a thermal test target temperature range;
controlling the opening degree of the pressure control valve, and adjusting the first pressure measured by the pressure sensor to be within a thermal test target pressure range;
and controlling the opening of the flow control valve, and adjusting the first flow measured by the flow sensor to be within a thermal test target flow range.
Optionally, the adjusting the cold test parameters to be within a preset target cold test parameter range includes:
controlling the temperature of the water outlet end of the cooling assembly, and adjusting the second water temperature to be within a cold test target temperature range;
controlling the opening degree of the pressure control valve, and adjusting the second pressure measured by the pressure sensor to be within a cold test target pressure range;
and controlling the opening degree of the flow control valve, and adjusting the second flow measured by the flow sensor to be within a cold test target flow range.
Optionally, the transmission cold thermal shock test method further comprises:
receiving a cold and hot alternate cycle test starting instruction, and acquiring a cold test time point and a hot test time point contained in the cold and hot alternate cycle test starting instruction;
generating a cold impact test starting instruction at the cold test time point;
and generating a thermal shock test starting instruction at the thermal test time point.
Optionally, after the adjusting the thermal test parameter to be within the preset target thermal test parameter range, the method includes:
continuously keeping the thermal test parameters within the target thermal test parameter range, and detecting whether the thermal test parameters exceed the target thermal test parameter range within preset thermal test duration in real time;
if the thermal test parameters exceed the range of the target thermal test parameters within the thermal test duration, generating a shutdown instruction and giving an alarm;
and if the thermal test parameters are continuously kept within the thermal test duration and do not exceed the target thermal test parameter range, closing the first switch piece at the thermal test ending time point corresponding to the thermal test duration.
Optionally, after the adjusting the cold test parameter to be within the preset target cold test parameter range, the method includes:
continuously keeping the cold test parameters within the target cold test parameter range, and detecting whether the cold test parameters exceed the target cold test parameter range within preset cold test duration in real time;
if the cold test parameters exceed the target cold test parameter range within the preset cold test duration, generating a shutdown instruction and giving an alarm;
and if the cold test parameters are continuously kept within the preset cold test duration and do not exceed the target cold test parameter range, closing the second switch piece at the cold test ending time point corresponding to the cold test duration.
According to the cold-hot impact test method of the transmission, a hot impact circulation closed loop for carrying out a hot impact test and a cold impact circulation closed loop for carrying out a cold impact test respectively measure and control the water inlet pressure (first pressure and second pressure), the flow (first flow and second flow) and the temperature (first temperature and second temperature) of circulating water entering a cooler of the transmission accurately through a pressure control module, a flow control module and a temperature sensor; further, the test results of the cold impact test and the thermal impact test are accurate. In addition, the pressure control module, the flow control module and the temperature sensor are shared, so that a circulating pipeline of the cold and hot impact test device is reduced, the structure is simpler, the test cost is reduced, and the integration level is improved.
In another aspect, an embodiment of the present invention further provides a computer device, including a memory, a processor, and computer readable instructions stored in the memory and executable on the processor, where the processor executes the computer readable instructions to implement the transmission cold and heat shock test method.
According to the computer equipment for realizing the cold and hot impact test method of the transmission, the computer equipment can control the pressure control module, the flow control module and the temperature sensor so as to respectively and accurately measure and control the water inlet pressure (first pressure and second pressure), the flow (first flow and second flow) and the temperature (first temperature and second temperature) of circulating water entering a cooler of the transmission; therefore, the pressure control module, the flow control module and the temperature sensor are shared, the circulating pipeline of the cold and hot impact test device is reduced, the structure is simpler, the test cost is reduced, and the integration level is improved; in the invention, all signals of the pressure control module, the flow control module, the temperature control module, the first switch piece and the second switch piece are processed by the computer equipment, thereby further realizing high integration and automation.
Drawings
Fig. 1 is a schematic diagram of a transmission thermal shock testing apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a transmission thermal shock testing apparatus according to another embodiment of the present invention.
Fig. 3 is a schematic diagram of a transmission thermal shock testing apparatus according to still another embodiment of the present invention.
The reference numerals in the specification are as follows:
10. a pressure control module; 101. a pressure control valve; 102. a pressure sensor;
20. a flow control module; 201. a flow control valve; 202. a flow sensor;
30. a temperature control module; 301. a heating assembly; 3011. heating a mold temperature machine; 3012. a first variable frequency pump; 302. a cooling assembly; 3021. cooling the mold temperature machine; 3022. a second variable frequency pump; 303. a temperature sensor;
40. a first switching member; 401. a first on-off valve; 402. a second on-off valve;
50. a second switching member; 501. a third on-off valve; 502. a fourth switching valve;
60. thermal shock cycle closed loop; 70. cold shock circulation closed loop; 80. a first evacuation member; 90. a second drain; 100. an external water tank; 110. a first safety valve; 120. a second relief valve; 130. a cooler.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects 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.
As shown in fig. 1, an embodiment of the present invention provides a transmission cold thermal shock test apparatus, the transmission including a cooler 130, the transmission cold thermal shock test apparatus including a pressure control module 10, a flow control module 20, a temperature control module 30, a first switching element 40, and a second switching element 50; the temperature control module 30 comprises a heating component 301, a cooling component 302 and a temperature sensor 303; understandably, the modules (or components) are connected through pipelines, so that water flow in a cold and hot impact test can flow through the modules from the pipelines. The pressure control module 10, the flow control module 20 and the temperature sensor 303 shown in fig. 1 are arranged in sequence according to the flowing direction of water in the pipeline, but in the present invention, the arrangement sequence of the pressure control module 10, the flow control module 20 and the temperature sensor 303 is not limited to that shown in fig. 1, for example, the water flow can be set to first flow through the flow control module 20 and then flow through the pressure control module 10 and then reach the temperature sensor 303; or the temperature signal may first pass through the temperature sensor 303, then pass through the pressure control module 10 and the flow control module 20, and so on, and the arrangement order of the three may be changed. Wherein the flow control module 20 can accurately measure and control the inlet water flow of the transmission cooler 130; a temperature control module 30 that can precisely measure (by temperature sensor 303) and control (by heating and cooling assemblies 301 and 302) the inlet water temperature of the transmission cooler 130; the pressure control module 10 may accurately measure and control the water inlet pressure to the transmission cooler 130.
The heating assembly 301, the first switch 40, the pressure control module 10, the flow control module 20, the temperature sensor 303 and the cooler 130 form a thermal shock circulation closed loop 60; in the closed thermal shock cycle loop 60, the pressure control module 10, the flow control module 20 and the temperature sensor 303 are all located between the water outlet end of the heating assembly 301 and the water inlet of the cooler 130; the first switch member 40 is used for controlling the thermal shock test for opening or closing the thermal shock cycle closed loop 60; that is, when performing the thermal shock test, the thermal shock circulation closed loop 60 precisely measures the water inlet pressure (the first pressure measured by the pressure control module 10), the flow rate (the first flow rate measured by the flow control module 20), and the temperature (the first temperature measured by the temperature sensor 303) of the circulating water entering the cooler 130 of the transmission through the pressure control module 10, the flow control module 20, and the temperature sensor 303, respectively; further, the pressure control module 10 controls a first pressure, the flow control module 20 controls a first flow rate, and the heating assembly 301 controls a first temperature; finally, thermal test parameters of the thermal shock test are adjusted to be within a preset target thermal test parameter range, so that the test result of the thermal shock test is accurate.
The cooling assembly 302, the second switch element 50, the pressure control module 10, the flow control module 20, the temperature sensor 303 and the cooler 130 form a cold impact cycle closed loop 70; in the cold impingement cycle closed loop 70, the pressure control module 10, the flow control module 20, and the temperature sensor 303 are all located between the water outlet end of the cooling module 302 and the water inlet of the cooler 130; the second switch member 50 is used for controlling the cold shock test for turning on or off the closed loop 70 of the cold shock cycle. That is, when the cold shock test is performed, the cold shock cycle closed loop 70 precisely controls the water inlet pressure (second pressure), the water inlet flow rate (second flow rate) and the water inlet temperature (second temperature) of the circulating water entering the cooler 130 of the transmission through the pressure control module 10, the flow control module 20 and the temperature sensor 303, respectively; a second pressure is further controlled by the pressure control module 10, a second flow rate is controlled by the flow control module 20, and a second temperature is controlled by the cooling module 302; finally, the cold test parameters for the cold shock test are adjusted to be within the preset target cold test parameter range, so that the test result of the cold shock test is accurate.
In the above embodiment of the present invention, the first switch element 40 and the second switch element 50 can realize the fast switching between the thermal shock test performed on the thermal shock cycle closed loop 60 and the cold shock test performed on the cold shock cycle closed loop 70; and the water inlet pressure, flow, temperature, etc. of the circulating water entering the cooler 130 of the transmission during the thermal shock cycle closed loop 60 for performing the thermal shock test and the cold shock cycle closed loop 70 for performing the cold shock test can be accurately measured and controlled, so that the test results of the cold shock test and the thermal shock test are accurate. In addition, the pressure control module 10, the flow control module 20 and the temperature sensor 303 are shared, so that a circulating pipeline of the cold and hot impact test device is reduced, the structure is simpler, the test cost is reduced, and the integration level is improved.
In one embodiment, as shown in fig. 2, the pressure control module 10 includes a pressure control valve 101 and a pressure sensor 102, and the pressure sensor 102 is disposed between the pressure control valve 101 and the water inlet of the cooler 130. That is, in the present embodiment, the first pressure at which the thermal shock test is performed and the second pressure at which the cold shock test is performed are measured by the pressure sensor 102; and then through the aperture of control pressure control valve 101, will the first pressure and the second pressure that pressure sensor 102 surveyed adjust to the target pressure within range to guarantee in the cold and hot shock test process, guarantee the stability of this first pressure or second pressure, and then make so that the experimental result of cold and hot shock test is accurate.
In one embodiment, as shown in fig. 2, the flow control module 20 includes a flow control valve 201 and a flow sensor 202, and the flow sensor 202 is disposed between the flow control valve 201 and the water inlet of the cooler 130. That is, in the present embodiment, the first flow rate at which the thermal shock test is performed and the second flow rate at which the cold shock test is performed are measured by the flow sensor 202; and then through the aperture of controlling flow control valve 201, will first flow and the second flow that flow sensor 202 surveyed are adjusted to the target flow within range to guarantee in cold and hot shock test process, guarantee the stability of this first flow or second flow, and then make so that cold and hot shock test's test result is accurate.
As can be seen from the above, since it is defined that the pressure sensor 102 is disposed between the pressure control valve 101 and the water inlet of the cooler 130, the flow sensor 202 is disposed between the flow control valve 201 and the water inlet of the cooler 130; however, the arrangement order of the pressure control module 10, the flow control module 20 and the temperature sensor 303 may be interchanged, so that the order among the pressure sensor 102, the pressure control valve 101, the flow sensor 202, the flow control valve 201 and the temperature sensor 303 may be interchanged to some extent in accordance with the above requirements, for example, the arrangement order may be set as the following groups (including but not limited to the following groups) except for fig. 2 according to the flow direction of the water flow:
a: a temperature sensor 303, a pressure control valve 101, a pressure sensor 102, a flow control valve 201, and a flow sensor 202;
b: temperature sensor 303, flow control valve 201, flow sensor 202, pressure control valve 101, pressure sensor 102;
c: a pressure control valve 101, a flow control valve 201, a pressure sensor 102, and a flow sensor 202; a temperature sensor 303;
d: a flow control valve 201, a pressure control valve 101, a pressure sensor 102, and a flow sensor 202; a temperature sensor 303;
e: a pressure control valve 101, a flow control valve 201, a pressure sensor 102, a temperature sensor 303, and a flow sensor 202;
f: pressure control valve 101, pressure sensor 102, temperature sensor 303, flow control valve 201, flow sensor 202.
Further, preferably, two control valves (the pressure control valve 101 and the flow control valve 201) must be arranged before three sensors (the pressure sensor 102, the temperature sensor 303 and the flow sensor 202), the arrangement order of the two control valves can be exchanged, the arrangement order of the three sensors can be exchanged, and thus, the pressure, the temperature and the flow data measured by the three sensors can be more accurate.
In one embodiment, as shown in fig. 2, the heating assembly 301 comprises a heating mold temperature machine 3011 and a first variable frequency pump 3012 connected to the heating mold temperature machine 3011; that is, in this embodiment, the first temperature measured by the final temperature sensor 303 may be controlled by controlling the outlet water temperature of the heating mold temperature machine 3011; the first variable frequency pump 3012 is used to provide power for the water flowing out of the heating mold temperature machine 3011 to enter the pipeline of the thermal shock circulation closed loop 60.
In one embodiment, as shown in fig. 2, the cooling assembly 302 includes a cooling die temperature machine 3021 and a second variable frequency pump 3022 connected to the cooling die temperature machine 3021. That is, in the present embodiment, the second temperature measured by the final temperature sensor 303 may be controlled by controlling the outlet water temperature of the cooling mold temperature machine 3021; the second variable frequency pump 3022 is used to power the effluent from the cooling die temperature machine 3021 into the piping of the cold impingement circulation loop 70.
In one embodiment, as shown in fig. 2, the first switch member 40 comprises a first switch valve 401 connected to the water outlet end of the heating assembly 301 and a second switch valve 402 connected to the water inlet end of the heating assembly 301; one end of the second switch valve 402 far away from the heating assembly 301 is connected with the water outlet of the cooler 130; it is understood that the end of the first switch valve 401 away from the water outlet end of the heating element 301 is connected to the pressure control valve 101 in fig. 2, but in the present invention, the arrangement order of the pressure control module 10, the flow control module 20 and the temperature sensor 303 can be changed, so that the end of the first switch valve 401 away from the water outlet end of the heating element can also be connected to the flow control module 20 (or the flow control valve 201 of the flow control module 20) or the temperature sensor 303.
Further, the second switch member 50 comprises a third switch valve 501 connected to the water outlet end of the cooling module 302 and a fourth switch valve 502 connected to the water inlet end of the cooling module 302; the end of the fourth switch valve 502 remote from the cooling module 302 is connected to the water outlet of the cooler 130. Understandably, the end of the third on-off valve 501 away from the water outlet end of the cooling module 302 is connected to the pressure control valve 101 in fig. 2, but in the present invention, since the arrangement order of the pressure control module 10, the flow control module 20 and the temperature sensor 303 can be changed, the end of the third on-off valve 501 away from the water outlet end of the cooling module 302 can also be connected to either the flow control module 20 (or the flow control valve 201 of the flow control module 20) or the temperature sensor 303.
Understandably, in the above-described embodiment, the first switching valve 401 and the second switching valve 402 collectively constitute the first switching piece 40, and the third switching valve 501 and the fourth switching valve 502 collectively constitute the second switching piece 50; thus, the control of opening or closing the thermal shock cycle closed loop 60 or the cold shock cycle closed loop 70 can be realized; as shown in fig. 2 and 3, when the first switching valve 401 and the second switching valve 402 are simultaneously opened and the third switching valve 501 and the fourth switching valve 502 are simultaneously closed, the water flow in the thermal shock cycle closed loop 60 is circulated on and the circulating water in the cold shock cycle closed loop 70 is cut off, and at this time, the thermal shock test can be and only will be performed; when the first switch valve 401 and the second switch valve 402 are closed simultaneously, and the third switch valve 501 and the fourth switch valve 502 are opened simultaneously, the circulating water in the thermal shock circulation closed loop 60 is cut off, and the water flow in the cold shock circulation closed loop 70 is circulated, at this time, the cold shock test can be performed only; thus, the first switch valve 401, the second switch valve 402, the third switch valve 501 and the fourth switch valve 502 are opened and closed, so that the cold and hot shock test can be rapidly switched, and two circulation closed loops are not interfered with each other when the cold and hot shock test is carried out.
In one embodiment, as shown in fig. 3, the transmission cold and hot shock test device further comprises a first evacuation member 80 disposed in the thermal shock cycle closed loop 60 and used for evacuating air in the thermal shock cycle closed loop 60; and/or the transmission cold-hot impact test device further comprises a second evacuation piece 90 which is arranged in the cold impact cycle closed loop 70 and is used for evacuating air in the cold impact cycle closed loop 70. In this embodiment, the first and second evacuators 80, 90 are preferably expansion kettles for evacuating the air present in the closed loop of the cycle before the test is started.
In one embodiment, as shown in fig. 3, the transmission thermal shock test apparatus further includes a first relief valve 110 disposed in the thermal shock cycle closed loop 60 and connected to the external water tank 100; the first safety valve 110 is an overpressure protection device in the thermal shock circulation closed loop 60, and can relieve the pressure in the thermal shock circulation closed loop 60 when the internal pressure in the thermal shock circulation closed loop 60 is too high. In fig. 3, the first relief valve 110 is provided between the first inverter pump 3012 and the first switching valve 401, but in the present invention, it may be provided at any position in the thermal shock cycle closed loop 60 as long as the effect of overpressure protection can be achieved.
Further, the transmission cold and hot shock test device further comprises a second safety valve 120 which is arranged in the cold shock cycle closed loop 70 and is connected with the external water tank 100. The second safety valve 120 is an overpressure protection device in the cold shock cycle closed loop 70, and can relieve the pressure in the cold shock cycle closed loop 70 when the internal pressure in the cold shock cycle closed loop 70 is too high. In fig. 3, the second relief valve 120 is provided between the second variable frequency pump 3022 and the third on/off valve 501, but in the present invention, it may be provided at any position in the cold shock cycle closed loop 70 as long as the effect of overpressure protection can be achieved. It is understood that the external water tanks 100 connected to the first safety valve 110 and the second safety valve 120 may be the same tank or different external water tanks.
On the other hand, the embodiment of the invention also provides a cold and hot shock test method for the transmission, which is used for performing a cold shock test and a thermal shock test (including a cold and hot alternating cycle test) on the cold and hot shock test device for the transmission; the cold and hot shock test method for the transmission comprises the following steps of:
step one, receiving a thermal shock test opening instruction, after confirming that the second switch piece 50 is closed (when the second switch piece 50 comprises a third switch valve 501 and a fourth switch valve 502, controlling the third switch valve 501 and the fourth switch valve 502 to be closed simultaneously), controlling the first switch piece 40 to be opened (when the first switch piece 40 comprises a first switch valve 401 and a second switch valve 402, controlling the first switch valve 401 and the second switch valve 402 to be opened simultaneously), and adjusting thermal test parameters to be within a preset target thermal test parameter range; the thermal test parameters include a first water temperature (set to ta) in the thermal shock cycle closed loop 60 measured by the temperature sensor 303, a first pressure (set to pa) in the thermal shock cycle closed loop 60 measured by the pressure control module 10, and a first flow (set to qa) measured by the flow control module 20; in the present embodiment, the target temperature is set to Ta, the allowable temperature error range is Δ Ta, the target pressure is Pa, the allowable pressure error range Δ Pa, the target flow rate is Qa, and the allowable flow rate error range is Δ Qa; at this time, adjusting the thermal test parameters to be within the preset target thermal test parameter range means that the first water temperature Ta reaches the thermal test target temperature range (Δ Ta is less than or equal to | Ta-Ta |); adjusting the pressure control module 10 to enable the first pressure Pa to reach a thermal test target pressure range (meeting the condition that | Pa-Pa | < delta Pa); the first flow Qa reaches the target flow range of the thermal test (satisfying | Qa-Qa | ≦ Δ Qa) by adjusting the flow control module 20.
Step two, receiving a cold impact test opening instruction, after confirming that the first switch piece 40 is closed (when the first switch piece 40 comprises a first switch valve 401 and a second switch valve 402, controlling the first switch valve 401 and the second switch valve 402 to be closed simultaneously), controlling the second switch piece 50 to be opened (when the second switch piece 50 comprises a third switch valve 501 and a fourth switch valve 502, controlling the third switch valve 501 and the fourth switch valve 502 to be opened simultaneously), and adjusting cold test parameters to be within a preset target cold test parameter range; the cold test parameters include a second water temperature (set to tc) in the cold shock cycle closed loop 70 measured by the temperature sensor 303, a second pressure (set to pc) in the cold shock cycle closed loop 70 measured by the pressure control module 10, and a second flow (set to qc) measured by the flow control module 20. In the present embodiment, a target temperature Tc, an allowable temperature error range Δ Tc, a target pressure Pc, an allowable pressure error range Δ Pc, a target flow rate Qc, and an allowable flow rate error range Δ Qc are set; at this time, adjusting the thermal test parameters to be within the preset target thermal test parameter range means that the second water temperature Tc reaches the thermal test target temperature range (Δ Tc is less than or equal to | Tc-Tc |) by adjusting the cooling module 302; adjusting the pressure control module 10 to enable the second pressure Pc to reach a thermal test target pressure range (meeting the condition that | Pc-Pc | < Δ Pc); the second flow rate Qc is made to reach the thermal test target flow rate range (satisfying | Qc-Qc | ≦ Δ Qc) by adjusting the flow rate control module 20.
According to the cold and hot impact test method of the transmission, the hot impact circulation closed loop 60 for carrying out the hot impact test and the cold impact circulation closed loop 70 for carrying out the cold impact test respectively and accurately control the water inlet pressure (first pressure and second pressure), the flow rate (first flow rate and second flow rate) and the temperature (first temperature and second temperature) of the circulating water entering the cooler 130 of the transmission through the pressure control module 10, the flow control module 20 and the temperature sensor 303; further, the test results of the cold impact test and the thermal impact test are accurate. In addition, the pressure control module 10, the flow control module 20 and the temperature sensor 303 are shared, so that a circulating pipeline of the cold and hot impact test device is reduced, the structure is simpler, the test cost is reduced, and the integration level is improved. It is understood that the sequence of the first step and the second step is not limited, but may be changed.
In one embodiment, as shown in FIG. 2, the pressure control module 10 includes a pressure control valve 101 and a pressure sensor 102; the flow control module 20 comprises a flow control valve 201 and a flow sensor 202;
the adjusting of the thermal test parameters to the preset target thermal test parameter range includes:
controlling the temperature of the water outlet end of the heating assembly 301, and adjusting the first water temperature to be within a thermal test target temperature range;
controlling the opening degree of the pressure control valve 101, and adjusting the first pressure measured by the pressure sensor 102 to be within a thermal test target pressure range;
the opening degree of the flow control valve 201 is controlled, and the first flow measured by the flow sensor 202 is adjusted to be within a thermal test target flow range.
In the embodiment, the temperature of the water outlet end of the thermal component 301 (preferably the water outlet end of the first variable-frequency pump 3012) is adjusted to make the first water temperature Ta reach the thermal test target temperature range (satisfy | Ta-Ta | ≦ Δ Ta); adjusting the opening degree of a pressure control valve 101 of the pressure control module 10 to enable the first pressure Pa to reach a thermal test target pressure range (meeting the condition that | Pa-Pa | is less than or equal to Δ Pa); the first flow Qa reaches the thermal test target flow range (satisfying | Qa-Qa | ≦ Δ Qa) by adjusting the opening of the flow control valve 201 of the flow control module 20.
In one embodiment, the adjusting the cold test parameters to be within the preset target cold test parameter range includes:
controlling the temperature of the water outlet end of the cooling assembly 302, and adjusting the second water temperature to be within a cold test target temperature range;
controlling the opening degree of the pressure control valve 101, and adjusting the second pressure measured by the pressure sensor 102 to be within a cold test target pressure range;
and controlling the opening degree of the flow control valve 201 to adjust the second flow measured by the flow sensor 202 to be within a cold test target flow range.
In the embodiment, the cooling module 302 is adjusted to make the second water temperature Tc reach the thermal test target temperature range (satisfy | Tc-Tc | ≦ Δ Tc); adjusting the opening degree of a pressure control valve 101 of the pressure control module 10 to enable the second pressure Pc to reach a thermal test target pressure range (meeting the condition that | Pc-Pc | < Δ Pc); the second flow rate Qc reaches the thermal test target flow rate range (satisfying | Qc-Qc | ≦ Δ Qc) by adjusting the opening degree of the flow control valve 201 of the flow control module 20.
In one embodiment, the transmission thermal shock test method further comprises:
receiving a cold and hot alternate cycle test starting instruction, and acquiring a cold test time point and a hot test time point contained in the cold and hot alternate cycle test starting instruction; that is, when performing the hot and cold alternation cycle test, it is necessary to switch the current test to the cold impact test or the thermal impact test at different time points, and in this embodiment, it is necessary to switch the current test to the cold impact test at the cold test time point and switch the current test to the thermal impact test at the thermal test time point.
Generating a cold impact test starting instruction at the cold test time point; that is, at the cold test time point, after the cold impact test start instruction is generated, the second step may be performed, and after it is determined that the first switch 40 is turned off, the second switch 50 is controlled to be turned on, the cold test parameters are adjusted to the preset target cold test parameter range, and then the current cold test parameters are maintained in the target cold test parameter range until the cold impact test is completed (i.e., the preset cold test duration is maintained).
And generating a thermal shock test starting instruction at the thermal test time point. That is, at the thermal test time point, after the thermal shock test start instruction is generated, the first step can be performed according to the generated cold shock test start instruction, after the second switch element 50 is confirmed to be closed, the first switch element 40 is controlled to be opened, the thermal test parameters are adjusted to be within the preset target thermal test parameter range, and then the current thermal test parameters are kept within the target thermal test parameter range until the thermal shock test is finished (i.e., the preset thermal test duration is kept). In one embodiment, the adjusting the thermal test parameter to be within the preset target thermal test parameter range includes:
continuously keeping the thermal test parameters within the target thermal test parameter range, and detecting whether the thermal test parameters exceed the target thermal test parameter range within a preset thermal test duration (which can be set according to specific requirements of a thermal shock test) in real time;
if the thermal test parameters exceed the range of the target thermal test parameters within the thermal test duration, generating a shutdown instruction and giving an alarm; that is, the pressure sensor 10 shown in fig. 2 measures the first pressure in real time, the flow sensor 202 measures the first flow rate in real time, and the temperature sensor 303 measures the first temperature in real time, when the measured first pressure exceeds the thermal test target pressure range, or/and the first flow rate exceeds the thermal test target flow rate range, or/and the first temperature exceeds the thermal test target temperature range (i.e. when any one or more of the three exceeds a preset alarm value), the system generates a shutdown instruction to instruct all the devices in the thermal shock cycle closed loop 60 to shutdown, and simultaneously alarms in the manners of sound, light, outgoing messages (by mail, telephone, short message, etc.).
If the thermal test parameter is not continuously kept beyond the range of the target thermal test parameter within the thermal test duration, the first switch member 40 is closed at the thermal test ending time point corresponding to the thermal test duration. That is, when the duration that the thermal test parameter is continuously kept not exceeding the target thermal test parameter range reaches the thermal test duration, which represents that the thermal shock test is completed, the first switch member 40 may be turned off, that is, the thermal shock test is ended.
In one embodiment, the adjusting the cold test parameters to be within the preset target cold test parameter range includes:
continuously keeping the cold test parameters within the target cold test parameter range, and detecting whether the cold test parameters exceed the target cold test parameter range within a preset cold test duration (which can be set according to the specific requirements of a cold impact test) in real time;
if the cold test parameters exceed the target cold test parameter range within the preset cold test duration, generating a shutdown instruction and giving an alarm; that is, the pressure sensor 10 shown in fig. 2 measures the second pressure in real time, the flow sensor 202 measures the second flow rate in real time, and the temperature sensor 303 measures the second temperature in real time, when the measured second pressure exceeds the cold test target pressure range, or/and the second flow rate exceeds the cold test target flow rate range, or/and the second temperature exceeds the cold test target temperature range (i.e. when any one or more of the three exceeds a preset alarm value), the system generates a shutdown instruction to instruct all the devices in the cold shock cycle closed loop 70 to shutdown, and simultaneously alarms in the manners of sound, light, outgoing messages (by mail, telephone, short message, etc.).
If the cold test parameter is continuously maintained within the preset cold test duration and does not exceed the target cold test parameter range, the second switch element 50 is turned off at the cold test ending time point corresponding to the cold test duration. That is, when the duration that the cold test parameter is continuously kept not exceeding the target cold test parameter range reaches the cold test duration, which represents that the cold shock test is completed, the second switch element 50 may be turned off, that is, the cold shock test is ended.
In another aspect, an embodiment of the present invention further provides a computer device, including a memory, a processor, and computer readable instructions stored in the memory and executable on the processor, where the processor executes the computer readable instructions to implement the transmission cold and heat shock test method. In one embodiment, the computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer readable instructions, and a database. The internal memory provides an environment for the operating system and execution of computer-readable instructions in the non-volatile storage medium.
According to the computer device for implementing the cold and hot impact test method of the transmission, the computer device can control the pressure control module 10, the flow control module 20 and the temperature sensor 303, so as to respectively and precisely control the water inlet pressure (first pressure and second pressure), the flow (first flow and second flow), and the temperature (first temperature and second temperature) of the circulating water entering the cooler 130 of the transmission; therefore, the pressure control module 10, the flow control module 20 and the temperature sensor 303 are shared, the circulating pipeline of the cold and hot impact test device is reduced, the structure is simpler, the test cost is reduced, and the integration level is improved; in the invention, all signals of the pressure control module 10, the flow control module 20, the temperature control module 30, the first switch part 40 and the second switch part 50 are processed by the computer equipment, so that high integration and automation are realized.
Understandably, the computer device is in communication connection with the following modules or components in the transmission thermal shock test apparatus shown in fig. 3: the device comprises a pressure control valve 101, a pressure sensor 102, a flow control valve 201, a flow sensor 202, a heating assembly 301 (comprising a heating mold temperature machine 3011 and a first variable-frequency pump 3012), a cooling assembly 302 (comprising a cooling mold temperature machine 3021 and a second variable-frequency pump 3022), a temperature sensor 303, a first switch piece 40 (comprising a first switch valve 401 and a second switch valve 402), and a second switch piece 50 (comprising a third switch valve 501 and a fourth switch valve 502). And when the processor of the computer equipment executes the computer readable instructions, the module or the component in the transmission cold and hot shock test device is controlled to execute the transmission cold and hot shock test method, so that the cold and hot shock test process can be automatically controlled by the computer equipment through a software program, and high integration and automation are further realized.
It will be understood by those of ordinary skill in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware associated with computer readable instructions, which can be stored in a non-volatile computer readable storage medium, and when executed, can include processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), Direct Rambus Dynamic RAM (DRDRAM), and Rambus Dynamic RAM (RDRAM).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (14)
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