CN111006831A - Automobile exhaust system simulation thermal vibration test device - Google Patents
Automobile exhaust system simulation thermal vibration test device Download PDFInfo
- Publication number
- CN111006831A CN111006831A CN201911385653.5A CN201911385653A CN111006831A CN 111006831 A CN111006831 A CN 111006831A CN 201911385653 A CN201911385653 A CN 201911385653A CN 111006831 A CN111006831 A CN 111006831A
- Authority
- CN
- China
- Prior art keywords
- air outlet
- air
- air inlet
- temperature
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
Abstract
The invention relates to a test device for simulating thermal vibration of an automobile exhaust system, which comprises a simulation electric heating system and a vibration test bed; the simulation electric heating system comprises a high-temperature circulating fan, a pipeline heater, a pressure stabilizing bin and a low-temperature fan; the air outlet end of the high-temperature circulating fan is connected to the air inlet of the pipeline heater, the air outlet of the pipeline heater is connected to the air inlet of the pressure stabilizing bin, the air outlet of the pressure stabilizing bin is connected to the air inlet end of the tested post-processor, and the air outlet end of the tested post-processor is respectively connected with the air inlet ends of the exhaust pipeline and the high-temperature circulating fan; the air outlet end of the low-temperature fan is connected to an air duct between the air outlet end of the pressure stabilizing bin and the air inlet end of the tested post-processor; the air outlet of the pressure stabilizing bin is connected with the air inlet end of the tested postprocessor through a ventilation pipeline and the air inlet end of the high-temperature circulating fan. The invention has the characteristics of energy saving, adjustable temperature, adjustable air quantity, quick high-low temperature conversion, high safety, low cost, low operation cost and the like.
Description
Technical Field
The invention relates to the technical field of automobile part tests, in particular to a simulated thermal vibration test device for an automobile exhaust system.
Background
In order to implement the air pollution prevention and control law of the people's republic of China, the pollution of the motor vehicle is strictly controlled, the emission of the automobile is upgraded from the fifth national standard to the sixth national standard, and the exhaust system, namely the postprocessor, of the automobile in the sixth national standard needs to pass a simulated thermal vibration test. The original natural gas and liquefied natural gas thermal vibration test is low in implementation cost and environment-friendly, but the safety evaluation difficulty is high during the test, the temperature, the air quantity and the high-low temperature conversion are not easy to control, and the temperature and speed requirements of the test standard cannot be met.
Therefore, the development and upgrading of the diesel automobile exhaust system (post-processor) become the key direction of various whole automobile factories and suppliers, and in order to meet the relevant requirements of the product development of the exhaust system (including the exhaust post-processor, the exhaust pipe and the muffler) of the main engine factory, the thermal vibration, the thermal durability test and the water quenching (cold and hot shock and the following same) test of the exhaust system (including the exhaust post-processor, the exhaust pipe and the muffler) are required to be carried out according to the requirements of the national standard GB/T18377-2001 technical requirements and test methods of catalytic converters for gasoline automobiles, and a corresponding thermal vibration simulation test device of the diesel automobile exhaust system (post-processor) must be developed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the automobile exhaust system simulated thermal vibration test device which combines an electric heating technology and a hot air recycling technology and has the characteristics of energy conservation, adjustable temperature, adjustable air quantity, quick high-low temperature conversion, high safety, low cost, low running cost and the like.
The invention is realized by the following technical scheme:
the automobile exhaust system simulated thermal vibration test device comprises a vibration test bed for placing a tested postprocessor; the testing device comprises a simulated electric heating system; the simulation electric heating system comprises a high-temperature circulating fan, a pipeline heater, a pressure stabilizing bin and a low-temperature fan; the air outlet end of the high-temperature circulating fan is connected to the air inlet of the pipeline heater through an air duct, the air outlet of the pipeline heater is connected to the air inlet of the pressure stabilizing bin through an air duct, the air outlet of the pressure stabilizing bin is connected to the air inlet end of the tested postprocessor through an air duct, and the air outlet end of the tested postprocessor is respectively connected with the air outlet duct and the air inlet end of the high-temperature circulating fan through air ducts; the air outlet end of the low-temperature fan is connected to an air duct between the air outlet end of the pressure stabilizing bin and the air inlet end of the tested postprocessor through the air duct; and the air outlet of the pressure stabilizing bin is connected with the air inlet end of the tested postprocessor through a ventilation pipeline and the air inlet end of the high-temperature circulating fan.
Automobile exhaust system simulation thermal vibration test device, wherein: a temperature sensor is also arranged on the ventilation pipeline between the air outlet of the pipeline heater and the air inlet of the pressure stabilizing bin; and an adjusting valve is also arranged on a vent pipeline between the air outlet of the pressure stabilizing bin and the air inlet end of the high-temperature circulating fan.
Automobile exhaust system simulation thermal vibration test device, wherein: the analog electric heating system also comprises a pneumatic butterfly valve and an orifice plate flowmeter; the pneumatic butterfly valve comprises a first pneumatic butterfly valve, a second pneumatic butterfly valve, a third pneumatic butterfly valve and a fourth pneumatic butterfly valve; the first pneumatic butterfly valve is arranged on a ventilation pipeline of an air outlet of the pressure stabilizing bin; the second pneumatic butterfly valve is arranged on a vent pipeline at the air outlet end of the low-temperature fan; the third pneumatic butterfly valve is arranged on the exhaust pipeline; and the fourth pneumatic butterfly valve and the orifice plate flowmeter are sequentially arranged on an air vent pipeline between the air outlet end of the tested postprocessor and the air inlet end of the high-temperature circulating fan.
Automobile exhaust system simulation thermal vibration test device, wherein: the pipeline heater comprises a shell, an airflow circulation channel, a heating sleeve, a heating element, a junction box and a thermocouple; the shell is internally provided with an accommodating space, one end of the shell is laterally provided with a heating air inlet pipe, and the other end of the shell is axially provided with a heating air outlet pipe; the heating sleeve is arranged on the inner side of the shell in a matching manner, the heating element is arranged in the heating sleeve in a matching manner, and an airflow circulation channel is arranged outside the heating element; a heat insulation layer is also filled in a space between the outer wall of the heating sleeve and the shell; one end of the heating sleeve extends out of one end of the shell, the extending end of the heating sleeve is provided with the junction box, and the other end of the heating sleeve is provided with a heating air outlet pipe; the heating air outlet pipe extends out of the other end of the shell, and the extending end of the heating air outlet pipe is provided with the thermocouple; the temperature measuring terminal is arranged in the junction box and connected with the thermocouple through the temperature measuring terminal, and a wiring hole is further formed in one side of the junction box.
Automobile exhaust system simulation thermal vibration test device, wherein: an air inlet end corrugated hose is connected between the air outlet of the pressure stabilizing bin and the air inlet end of the tested post-processor; the air outlet end of the tested postprocessor is connected with an air outlet end corrugated hose; the air inlet end of the air outlet end corrugated hose is connected with the air outlet end of the tested post-processor, the air outlet end of the air outlet end corrugated hose is connected with two air ducts, one air duct is the exhaust duct, and the other air duct is communicated with the air inlet end of the high-temperature circulating fan through the air duct.
Automobile exhaust system simulation thermal vibration test device, wherein: and a temperature measuring device and a pressure measuring device are sequentially arranged on a ventilation pipeline between the air outlet end of the corrugated hose at the air inlet end and the air inlet end of the tested post-processor.
Automobile exhaust system simulation thermal vibration test device, wherein: the low-temperature fan adopts a 5.5KW centrifugal fan.
Has the advantages that:
the device for testing the simulated thermal vibration of the automobile exhaust system has simple and reasonable structural design, combines an electric heating technology and a hot air recycling technology, and has the characteristics of energy conservation, adjustable temperature, adjustable air quantity, double-fan air channels, high and low temperature conversion speed, high safety, low cost, low operation cost and the like.
The invention also has the following advantages:
(1) by adopting the double-fan and double-loop design of the high-temperature circulating fan and the low-temperature fan, the free switching of cold and hot air can be realized, the temperature rise time (100 ℃ → 550 ℃) of the test piece inlet is not more than 5 minutes, and the temperature drop time (550 ℃ → 100 ℃) is not more than 3 minutes in the thermal fatigue test;
(2) the high-temperature circulating fan adopts a frequency converter of an electric control system to carry out frequency conversion control to regulate high-temperature air quantity, the maximum air quantity is 800m3/h, the minimum air quantity is 80m3/h, and the control precision is +/-15 m 3/h;
(3) the simulation electric heating system is designed to be movable, is convenient to be combined with different excitation sources for use, and can also be combined with a water spraying system for use.
(4) The actual maximum temperature achievable by the pipe heater of the simulated electric heating system is up to 580 ℃.
Drawings
FIG. 1 is a schematic diagram of the structural connection of a simulated electric heating system of the device for testing the simulated thermal vibration of the automobile exhaust system according to the present invention;
FIG. 2 is a schematic structural diagram of a simulated electric heating system of the device for testing simulated thermal vibration of an automobile exhaust system according to the present invention;
FIG. 3 is a left side view of a simulated electrical heating system of the simulated thermal vibration testing apparatus of an automotive exhaust system in accordance with the present invention;
FIG. 4 is a right side view of a simulated electrical heating system of the simulated thermal vibration testing apparatus of an automotive exhaust system in accordance with the present invention;
FIG. 5 is a top view of a simulated electrical heating system of the simulated thermal vibration testing apparatus of an automotive exhaust system in accordance with the present invention;
FIG. 6 is a rear view of a simulated electrical heating system of the simulated thermal vibration testing apparatus of an automotive exhaust system of the present invention;
FIG. 7 is a schematic structural diagram of a pipe heater of a simulated electric heating system of the device for testing simulated thermal vibration of an automobile exhaust system according to the present invention;
FIG. 8 is a partial circuit diagram of an electrical control system of the simulated thermal vibration test apparatus for an automotive exhaust system in accordance with the present invention;
FIG. 9 is another circuit diagram of the electrical control system of the simulated thermal vibration testing apparatus for the exhaust system of the vehicle according to the present invention.
Detailed Description
The invention discloses a test device for simulating thermal vibration of an automobile exhaust system, which comprises a simulated electric heating system 1, a vibration test bed 2 and an electric control system.
As shown in fig. 1 to 7, the simulated electric heating system 1 simulates the actual use condition, temperature and airflow of the exhaust system (after-processor) to be changed continuously. The simulation electric heating system 1 comprises a base 10, a high-temperature circulating fan 11, a pipeline heater 12, a pressure stabilizing bin 13, a pneumatic butterfly valve 14, a regulating valve 15, an air inlet end corrugated hose 16, a low-temperature fan 17, an air outlet end corrugated hose 18 and an orifice plate flowmeter 19; the high-temperature circulating fan 11, the pipeline heater 12 and the regulating valve 15 are all electrically connected with an electrical control system; the pneumatic butterfly valve 14 is connected to an electrical control system and includes a first pneumatic butterfly valve 141, a second pneumatic butterfly valve 142, a third pneumatic butterfly valve 143, and a fourth pneumatic butterfly valve 144.
The tested post processor 3 is arranged at the upper part of the vibration test bed 2; the vibration test stand 2 is an electromagnetic vibration stand.
The high-temperature circulating fan 11 is used for circularly heating and providing hot working condition high-temperature hot air flow for the tested postprocessor 3; wherein, this high temperature circulating fan 11 installs on base 10 and adopts 7.5KW centrifugal fan, and its end of giving vent to anger is connected to the air inlet of this pipe heater 12 through the air duct. The pipe heater 12 is arranged on the upper part of the base 10 through the heater bracket 120 in a matching way, and the air outlet of the pipe heater is connected to the air inlet of the pressure stabilizing bin 13 through an air duct; a temperature sensor 121 is also arranged on the ventilation pipeline between the air outlet of the pipeline heater 12 and the air inlet of the pressure stabilizing bin 13; the practical maximum temperature that can be achieved by the pipe heater 12 is up to 580 deg.c. The power output end of the motor 111 of the high-temperature circulating fan 11 is provided with a fan blade 112; the fan blade 112 of the high temperature circulating fan 11 adopts a high temperature resistant stainless steel 310S blade, the fan blade 112 of the high temperature circulating fan 11 is specially designed to match high temperature, high wind pressure and small wind volume (wind pressure 5KPa, wind volume 3000 cubic meter/H), and the impeller shaft of the high temperature circulating fan 11 adopts a high temperature graphite ring seal to prevent hot air leakage.
As shown in fig. 7, the duct heater 12 includes a housing 121, an airflow passage 122, a heating jacket 123, a heating element 124, a junction box 125, and a thermocouple 126. Wherein, the housing 121 has a receiving space therein, and a heating air inlet 1211 is disposed at one end of the housing; the heating sleeve 123 is fittingly installed inside the housing 121 and is internally fittingly installed with a heating element 124, and an airflow circulation passage 122 is installed outside the heating element 124; an insulating layer 127 is also filled in the space between the outer wall of the heating sleeve 123 and the shell 121; one end of the heating sleeve 123 extends out of one end of the housing 121, the extending end is provided with a junction box 125, and the other end is axially provided with a heating air outlet pipe 1231; the heating air outlet pipe 1231 extends out of the other end of the shell 121, and the extending end is provided with a thermocouple 126; the junction box 125 is provided with a temperature measuring terminal 1251 therein and is connected to the thermocouple 126 through the temperature measuring terminal 1251, and a wiring hole 1252 is provided on one side of the junction box 125.
The pressure stabilizing bin 13 is installed on the upper part of the base 10 in a matching way through a pressure stabilizing bin mounting rack 131 and is positioned above the high-temperature circulating fan 11 and the pipeline heater 12; the air outlet of the pressure stabilizing bin 13 is connected with the air inlet end of an air inlet end corrugated hose 16 through an air duct; the air outlet end of the air inlet end corrugated hose 16 is connected to the air inlet end of the tested post-processor 3 through an air vent pipeline; a first pneumatic butterfly valve 141 is arranged on a ventilation pipeline between the air outlet of the pressure stabilizing bin 13 and the air inlet end of the corrugated hose 16 at the air inlet end; a temperature measuring device 161 and a pressure measuring device 162 are sequentially arranged on an air duct between the air outlet end of the air inlet end corrugated hose 16 and the air inlet end of the tested post-processor 3.
The regulating valve 15 is installed on a breather pipe between the air inlet end of the air inlet end corrugated hose 16 and the air inlet end of the high-temperature circulating fan 11.
The low temperature fan 17 employs a 5.5KW centrifugal fan (blower) for supplying cold air flow (normal temperature) to the tested postprocessor 3 under a cooling condition. The low-temperature fan 17 is arranged on the base 10 in a matching way and is positioned at the lower side of the pressure stabilizing bin 13, and the air outlet end of the low-temperature fan is connected with the air inlet end of the corrugated hose 16 at the air inlet end through a ventilation pipeline; a second pneumatic butterfly valve 142 is also mounted on the vent pipe between the air outlet end of the low temperature fan 17 and the air inlet end of the corrugated hose 16 at the air inlet end. The air inlet end of the air outlet end corrugated hose 18 is connected to the air outlet end of the tested post-processor 3, the air outlet end of the air outlet end corrugated hose 18 is connected with two paths of air ducts, wherein one path of air duct is an exhaust duct, and the other path of air duct is communicated with the air inlet end of the high-temperature circulating fan 11 through an air duct; a third pneumatic butterfly valve 143 is arranged on the exhaust pipeline at the air outlet end of the corrugated hose 18 at the air outlet end; a fourth pneumatic butterfly valve 144 and an orifice flowmeter 19 are sequentially arranged on the vent pipeline between the air outlet end of the air outlet end corrugated hose 18 and the air inlet end of the high-temperature circulating fan 11.
The simulation electric heating system 1 adopts a double-path double-fan design to realize the temperature conditions of high-temperature working condition and low-temperature working condition required by the test and realize rapid alternation; the pressure stabilizing bin 13 designed on the hot gas pipeline can stabilize the pressure of the circulating pipeline and store heat energy, and the heating time of the heating working condition and the conversion time of the alternating test are reduced.
As shown in fig. 8-9, the electrical control system includes fuse QF, fuse SA, Silicon Controlled Rectifier (SCR), frequency converter, contactor KM1, fuse 2K1, fuse 2K2, contactor KM2, resistor RJ1, contactor KM3, resistor RJ2, fuse 2K3, socket, fuse 2K4, relay KA1, relay KA2, relay KA4, fuse 2K5, PLC controller, switching power module, and PXR9 temperature-controlled meter; the PLC controller is model number Mitsubishi FX3U-32 MR.
The fuse QF and the fuse SA are sequentially connected to three-phase electric wires L1-L3.
One end of a normally open switch of the contactor KM1 is connected with a three-phase wire L21-L23 at the power output end of the fuse SA, and the other end of the normally open switch of the contactor KM1 is connected with one end of a Silicon Controlled Rectifier (SCR); the other end of the Silicon Controlled Rectifier (SCR) is connected with a connecting terminal of a 48KW pipeline heater 12; the positive end of the Silicon Controlled Rectifier (SCR) is connected with a normally open switch of the relay KA4 and is connected with one end of the PXR9 temperature control meter through the normally open switch of the relay KA4, and the negative end of the Silicon Controlled Rectifier (SCR) is connected with the other end of the PXR9 temperature control meter; the power supply input end of the Silicon Controlled Rectifier (SCR) is respectively connected with a three-phase electric wire L23 and a zero line N of the power supply output end of the fuse SA.
One end of the frequency converter is connected with a 25A fuse 2K1 and is connected with a three-phase electric wire L21-L23 of the power output end of the fuse SA through a fuse 2K1, and the other end of the frequency converter is connected with the low-temperature fan 17.
The fuse 2K2 is a 16A fuse, and the power input end of the fuse is connected with three-phase wires L21-L23 of the power output end of the fuse SA; one end of a normally open switch of the contactor KM2 is connected with a power output end of the fuse 2K2, and the other end of the normally open switch of the contactor KM2 is connected with a resistor RJ1 and is connected with a 5.5KW blower (namely, a low-temperature fan 17) through the resistor RJ 1; one end of a normally open switch of the contactor KM3 is connected with the power output end of the fuse 2K2, and the other end of the normally open switch of the contactor KM3 is connected with a resistor RJ2 and is connected with a 40W centrifugal fan (i.e. a heat radiation fan of the high temperature circulating fan 11) through the resistor RJ 2.
One end of the socket is connected with a fuse 2K3 and is connected with a three-phase electric wire L21 of the power output end of the fuse SA and the zero line N through a fuse 2K 3. The power supply access end of the PXR9 temperature control meter corresponds to a three-phase electric wire L22 and a zero line N which are connected to the power supply output end of the fuse SA respectively.
The power input end of the fuse 2K4 is respectively connected with a three-phase electric wire L22 and a zero line N of the power output end of the fuse SA; one end of a normally open switch of the relay KA1 is connected with the power output end of the fuse 2K4 of the 10A, and the other end of the normally open switch of the relay KA1 is connected with the fan of the electric control cabinet; one end of a normally open switch of the relay KA2 is connected with the power output end of the fuse 2K4 of the 10A, and the other end of the normally open switch of the relay KA2 is connected with a 500W equipment bin fan.
The fuse 2K5 is a 6A fuse, and the power input end of the fuse is respectively connected with a three-phase electric wire L23 and a zero line N at the power output end of the fuse SA; the PLC controller, the switch power supply module and the PXR9 temperature control meter are respectively connected to the power output end of the fuse 2K5 in parallel; the switching power supply module provides 24V power.
The PLC controller is connected with an emergency stop switch through a pin X0 and is connected with a switch power supply module through the emergency stop switch, and the PLC controller is connected with an operation switch through a pin X1 and is connected with the switch power supply module through the operation switch; the PLC controller is connected with a heating permission switch through a pin X2 and connected with a switching power supply module through the heating permission switch, and is connected with a pressure switch through a pin X3 and connected with the switching power supply module through the pressure switch. One end of a coil of the contactor KM1 is connected with a pin Y0 of a PLC controller, and the other end of the coil is connected with three-phase power supplies L1-L3; one end of a coil of the contactor KM2 is connected with a pin Y1 of a PLC controller, and the other end of the coil is connected with three-phase power supplies L1-L3; one end of a coil of the contactor KM3 is connected with a pin Y2 of a PLC controller, and the other end of the coil is connected with three-phase power supplies L1-L3; one end of a coil of the relay KA1 is connected with a pin Y14 of the PLC, and the other end of the coil is connected with a 24V power supply output by the switch power supply module; one end of a coil of the relay KA2 is connected with a pin Y15 of the PLC, and the other end of the coil is connected with a 24V power supply output by the switch power supply module; one end of a coil of the relay KA3 is connected with a pin Y16 of the PLC, and the other end of the coil is connected with a 24V power supply output by the switch power supply module; one end of a coil of the relay KA4 is connected with a pin Y17 of the PLC, and the other end of the coil is connected with a 24V power supply output by the switch power supply module. As shown in FIG. 9, the PLC controller is further connected with three 4AD modules, a 4AD-ADP module and a 4AD-TC-ADP module; the 4AD module is a PLC extended 4-channel analog quantity acquisition module, and converts analog quantity signals into digital quantity for display or control; the 4AD-ADP module is a self-adaptive type 4-path analog quantity (0/4-20 mA/0-5V/0-10V) acquisition module; the 4AD-TC-ADP module is a self-adaptive 4-path temperature signal (thermocouple/thermal resistor) acquisition module.
The temperature sensor 121 of the analog electric heating system 1 is connected with a 4AD-TC-ADP module of a PLC controller in a matching way; the power supply input end of the pneumatic butterfly valve 14 (both DF1 and DF2 in fig. 9) of the analog electric heating system 1 is connected to the 24V power supply output by the switching power supply module, and the signal end is connected to the PLC controller.
The invention is further explained by combining the working principle and the characteristics of the test device for simulating the thermal vibration of the automobile exhaust system under the thermal working condition and the cold working condition:
(1) thermal conditions
The air is pressurized by adopting a high-temperature circulating fan 11, the high-temperature air heated by a pipeline heater 12 enters the tested postprocessor 3, and the control process is as follows: simulating the exhaust of a diesel engine, wherein the highest temperature is 600 ℃, and the thermal cycle heating mode is as follows: the first and fourth pneumatic butterfly valves 141, 144 are open, the second and third pneumatic butterfly valves 142, 142 are closed; the hot air circulation path is: the high-temperature circulating fan 11 → the pipe heater 12 → the surge tank 13 → the first pneumatic butterfly valve 141 → the intake end corrugated hose 16 → the tested post-processor 3 → the exhaust end corrugated hose 18 → the fourth pneumatic butterfly valve 144 → the orifice plate flowmeter 19 → the high-temperature circulating fan 11;
the characteristics of the thermal conditions are as follows: the hot air passing through the tested postprocessor 3 is recycled through the high-temperature circulating fan 11, the hot air is fully utilized, electric energy is saved, heat energy is fully utilized, only heat loss of a pipeline is supplemented, the high-temperature circulating fan 11 is specially designed (a fan blade is made of high-temperature resistant stainless steel 310S, the fan blade is specially designed to match with high air pressure and small air quantity, and an impeller shaft is sealed by a high-temperature graphite ring to prevent hot air leakage) and can meet long-term operation.
(2) Cold working condition
When the high-temperature circulating pipeline is closed, namely the first pneumatic butterfly valve 141 is closed and the fourth pneumatic butterfly valve 144 is closed, the second pneumatic butterfly valve 142 and the third pneumatic butterfly valve 143 are opened, the cooling pipeline is opened, and the low-temperature fan 17 blows cold air to directly cool the tested post-processor 3; the cold air flow path is as follows: the low-temperature fan 17 → the second pneumatic butterfly valve 142 → the air inlet end corrugated hose 16 → the post-processor 3 under test → the air outlet end corrugated hose 18 → the third pneumatic butterfly valve 143 → the air is discharged to the room and is drawn out by the roof fan.
The invention has simple and reasonable structural design and high safety, combines an electric heating technology and a hot air recycling technology, and has the characteristics of energy conservation, adjustable temperature, adjustable air quantity, quick high-low temperature conversion, high safety, low cost, low operation cost and the like.
Claims (7)
1. A simulated thermal vibration test device for an automobile exhaust system comprises a vibration test bed for placing a tested postprocessor; the method is characterized in that: the testing device comprises a simulated electric heating system; the simulation electric heating system comprises a high-temperature circulating fan, a pipeline heater, a pressure stabilizing bin and a low-temperature fan; the air outlet end of the high-temperature circulating fan is connected to the air inlet of the pipeline heater through an air duct, the air outlet of the pipeline heater is connected to the air inlet of the pressure stabilizing bin through an air duct, the air outlet of the pressure stabilizing bin is connected to the air inlet end of the tested postprocessor through an air duct, and the air outlet end of the tested postprocessor is respectively connected with the air outlet duct and the air inlet end of the high-temperature circulating fan through air ducts; the air outlet end of the low-temperature fan is connected to an air duct between the air outlet end of the pressure stabilizing bin and the air inlet end of the tested postprocessor through the air duct; and the air outlet of the pressure stabilizing bin is connected with the air inlet end of the tested postprocessor through a ventilation pipeline and the air inlet end of the high-temperature circulating fan.
2. The simulated thermal vibration test device of an automobile exhaust system according to claim 1, wherein: a temperature sensor is also arranged on the ventilation pipeline between the air outlet of the pipeline heater and the air inlet of the pressure stabilizing bin; and an adjusting valve is also arranged on a vent pipeline between the air outlet of the pressure stabilizing bin and the air inlet end of the high-temperature circulating fan.
3. The simulated thermal vibration test device of an automobile exhaust system according to claim 1, wherein: the analog electric heating system also comprises a pneumatic butterfly valve and an orifice plate flowmeter; the pneumatic butterfly valve comprises a first pneumatic butterfly valve, a second pneumatic butterfly valve, a third pneumatic butterfly valve and a fourth pneumatic butterfly valve; the first pneumatic butterfly valve is arranged on a ventilation pipeline of an air outlet of the pressure stabilizing bin; the second pneumatic butterfly valve is arranged on a vent pipeline at the air outlet end of the low-temperature fan; the third pneumatic butterfly valve is arranged on the exhaust pipeline; and the fourth pneumatic butterfly valve and the orifice plate flowmeter are sequentially arranged on an air vent pipeline between the air outlet end of the tested postprocessor and the air inlet end of the high-temperature circulating fan.
4. The simulated thermal vibration test device of an automobile exhaust system according to claim 1, wherein: the pipeline heater comprises a shell, an airflow circulation channel, a heating sleeve, a heating element, a junction box and a thermocouple;
the shell is internally provided with an accommodating space, one end of the shell is laterally provided with a heating air inlet pipe, and the other end of the shell is axially provided with a heating air outlet pipe;
the heating sleeve is arranged on the inner side of the shell in a matching manner, the heating element is arranged in the heating sleeve in a matching manner, and an airflow circulation channel is arranged outside the heating element;
a heat insulation layer is also filled in a space between the outer wall of the heating sleeve and the shell; one end of the heating sleeve extends out of one end of the shell, the extending end of the heating sleeve is provided with the junction box, and the other end of the heating sleeve is provided with a heating air outlet pipe; the heating air outlet pipe extends out of the other end of the shell, and the extending end of the heating air outlet pipe is provided with the thermocouple;
the temperature measuring terminal is arranged in the junction box and connected with the thermocouple through the temperature measuring terminal, and a wiring hole is further formed in one side of the junction box.
5. The simulated thermal vibration test device of an automobile exhaust system according to claim 1, wherein: an air inlet end corrugated hose is connected between the air outlet of the pressure stabilizing bin and the air inlet end of the tested post-processor; the air outlet end of the tested postprocessor is connected with an air outlet end corrugated hose; the air inlet end of the air outlet end corrugated hose is connected with the air outlet end of the tested post-processor, the air outlet end of the air outlet end corrugated hose is connected with two air ducts, one air duct is the exhaust duct, and the other air duct is communicated with the air inlet end of the high-temperature circulating fan through the air duct.
6. The simulated thermal vibration test device of an automobile exhaust system according to claim 5, wherein: and a temperature measuring device and a pressure measuring device are sequentially arranged on a ventilation pipeline between the air outlet end of the corrugated hose at the air inlet end and the air inlet end of the tested post-processor.
7. The simulated thermal vibration test device of an automobile exhaust system according to claim 1, wherein: the low-temperature fan adopts a 5.5KW centrifugal fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911385653.5A CN111006831B (en) | 2019-12-29 | 2019-12-29 | Automobile exhaust system simulation thermal vibration test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911385653.5A CN111006831B (en) | 2019-12-29 | 2019-12-29 | Automobile exhaust system simulation thermal vibration test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111006831A true CN111006831A (en) | 2020-04-14 |
| CN111006831B CN111006831B (en) | 2022-06-24 |
Family
ID=70118414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911385653.5A Active CN111006831B (en) | 2019-12-29 | 2019-12-29 | Automobile exhaust system simulation thermal vibration test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111006831B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1671954A (en) * | 2002-07-25 | 2005-09-21 | 里法特·A·卡梅尔 | Exhaust after-treatment system for the reduction of pollutants from diesel engine exhaust and related method |
| EP1802956A2 (en) * | 2004-10-08 | 2007-07-04 | Pascal Lantieri | Method for optimizing an accelerated scaled stress test |
| CN102095587A (en) * | 2010-12-17 | 2011-06-15 | 杭州银轮科技有限公司 | Simulation test bed used for engine exhaust aftertreatment device |
| CN202126384U (en) * | 2011-05-24 | 2012-01-25 | 东莞市立佳精密仪器有限公司 | Thermal shock test chamber |
| CN202166624U (en) * | 2010-12-23 | 2012-03-14 | 烟台富耐克散热器有限公司 | Radiator and fan performance testing device |
| CN203572625U (en) * | 2013-09-23 | 2014-04-30 | 潍柴动力股份有限公司 | Examining system for component thermal state vibration |
| CN105628857A (en) * | 2016-02-05 | 2016-06-01 | 浙江浙能技术研究院有限公司 | Industrial pilot test performance testing device and industrial pilot test performance testing method for SCR (selective catalytic reduction) denitration catalyst |
| CN106322110A (en) * | 2016-10-31 | 2017-01-11 | 武汉东测科技有限责任公司 | Automotive catalyst converter testing hot air supply device and method |
| CN108240905A (en) * | 2018-03-20 | 2018-07-03 | 苏州中汽检测技术服务有限公司 | A kind of automobile exhaust pipe thermal vibration detecting system |
| CN208803889U (en) * | 2018-07-02 | 2019-04-30 | 万向通达股份公司 | A kind of vehicle exhaust emission system and its preprocessor |
| CN109708861A (en) * | 2018-12-29 | 2019-05-03 | 东南大学 | A kind of automobile exhaust pipe thermal vibration detection method and detection system, computer program |
| CN110017564A (en) * | 2019-03-28 | 2019-07-16 | 青岛海尔空调电子有限公司 | Double-cold source fresh air handling unit and its control method |
-
2019
- 2019-12-29 CN CN201911385653.5A patent/CN111006831B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1671954A (en) * | 2002-07-25 | 2005-09-21 | 里法特·A·卡梅尔 | Exhaust after-treatment system for the reduction of pollutants from diesel engine exhaust and related method |
| EP1802956A2 (en) * | 2004-10-08 | 2007-07-04 | Pascal Lantieri | Method for optimizing an accelerated scaled stress test |
| CN102095587A (en) * | 2010-12-17 | 2011-06-15 | 杭州银轮科技有限公司 | Simulation test bed used for engine exhaust aftertreatment device |
| CN202166624U (en) * | 2010-12-23 | 2012-03-14 | 烟台富耐克散热器有限公司 | Radiator and fan performance testing device |
| CN202126384U (en) * | 2011-05-24 | 2012-01-25 | 东莞市立佳精密仪器有限公司 | Thermal shock test chamber |
| CN203572625U (en) * | 2013-09-23 | 2014-04-30 | 潍柴动力股份有限公司 | Examining system for component thermal state vibration |
| CN105628857A (en) * | 2016-02-05 | 2016-06-01 | 浙江浙能技术研究院有限公司 | Industrial pilot test performance testing device and industrial pilot test performance testing method for SCR (selective catalytic reduction) denitration catalyst |
| CN106322110A (en) * | 2016-10-31 | 2017-01-11 | 武汉东测科技有限责任公司 | Automotive catalyst converter testing hot air supply device and method |
| CN108240905A (en) * | 2018-03-20 | 2018-07-03 | 苏州中汽检测技术服务有限公司 | A kind of automobile exhaust pipe thermal vibration detecting system |
| CN208803889U (en) * | 2018-07-02 | 2019-04-30 | 万向通达股份公司 | A kind of vehicle exhaust emission system and its preprocessor |
| CN109708861A (en) * | 2018-12-29 | 2019-05-03 | 东南大学 | A kind of automobile exhaust pipe thermal vibration detection method and detection system, computer program |
| CN110017564A (en) * | 2019-03-28 | 2019-07-16 | 青岛海尔空调电子有限公司 | Double-cold source fresh air handling unit and its control method |
Non-Patent Citations (3)
| Title |
|---|
| BAILEY RT: "Study on torsional vibration of thermal power units caused by wind thermal bundled system via series compensation", 《APPEEC》 * |
| 李强: "船舶进排气系统数值模拟及阻力模拟装置研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
| 杨国鹏: "歧管式催化转化器性能评价试验的研究", 《万方文库》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111006831B (en) | 2022-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101587027B (en) | System for testing heat-transfer performance of gas-water-oil heat interchanger | |
| CN201289435Y (en) | Test stand for heat dispersion of radiator | |
| CN101832861B (en) | Submarine environment condition simulating device for diesel engine | |
| CN102829976B (en) | Simulator stand for exhaust characteristics of vehicle engine | |
| CN103884529A (en) | Method and device for testing heat dissipation performance of radiator assembly | |
| CN106226060B (en) | Aircraft auxiliary power plant test macro | |
| Marelli et al. | Heat transfer effects on performance map of a turbocharger compressor for automotive application | |
| CN102840995A (en) | Performance test analysis system for EGR (Exhaust Gas Recirculation) cooler | |
| CN111006831B (en) | Automobile exhaust system simulation thermal vibration test device | |
| RU138285U1 (en) | STAND FOR TESTING TURBOCHARGERS OF INTERNAL COMBUSTION ENGINES | |
| CN102808743B (en) | Temperature control method and system for cabin of wind turbine generator | |
| CN209606053U (en) | A kind of wind-tunnel hot exhaust interference test device | |
| CN210863158U (en) | Test device for measuring resistance loss of pipeline of starting system of aircraft engine | |
| CN206248315U (en) | A kind of automobile gearbox detection apparatus for electromagnetic valve | |
| CN205506400U (en) | Integrated form gas turbine test bench system | |
| CN208736448U (en) | A kind of engine blade tip high-temperature sensor performance verification system | |
| CN212517262U (en) | Hydrogen fuel cell engine test platform | |
| CN211741904U (en) | Transformer oil temperature detection tester | |
| CN103558016A (en) | Testing rack and all-condition sealing testing device | |
| CN212111690U (en) | High-altitude performance simulation test bed for generator set | |
| CN203616154U (en) | Aircraft steering engine temperature testing device | |
| RU138586U1 (en) | STAND FOR TESTING TURBOCHARGERS OF INTERNAL COMBUSTION ENGINES | |
| CN201859058U (en) | Enginee thermal balance performance high altitude simulation test device | |
| CN207066743U (en) | A kind of high-speed internal combustion engine simulates gas handling system experimental rig | |
| CN210322659U (en) | Cold and hot impact case of ability high-efficient heating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |