CN114486271B - Basic module test platform and test method for two-stage sequential supercharging system - Google Patents
Basic module test platform and test method for two-stage sequential supercharging systemInfo
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- CN114486271B CN114486271B CN202210106730.4A CN202210106730A CN114486271B CN 114486271 B CN114486271 B CN 114486271B CN 202210106730 A CN202210106730 A CN 202210106730A CN 114486271 B CN114486271 B CN 114486271B
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- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 238000010998 test method Methods 0.000 title claims abstract description 15
- 239000010687 lubricating oil Substances 0.000 claims description 32
- 239000003921 oil Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000011056 performance test Methods 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 59
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Abstract
The invention discloses a basic module test platform and a test method of a two-stage sequential supercharging system. The gas generating system comprises a high-pressure stage gas compressor, a high-pressure stage variable geometry turbine, a low-pressure stage gas compressor and a low-pressure stage variable geometry turbine, wherein the high-pressure stage variable geometry turbine is connected with the low-pressure stage variable geometry turbine in series, the low-pressure stage variable geometry turbine is connected with the high-pressure stage variable geometry turbine in series, an intercooler is connected between the low-pressure stage gas compressor and the high-pressure stage gas compressor in series, an inlet of the high-pressure stage variable geometry turbine is connected with an outlet of the gas generating system, an outlet of the high-pressure stage gas compressor is connected with an air main branch and an air auxiliary branch, the air main branch is connected with an air inlet of the gas generating system, the air auxiliary branch is connected with a gas outlet of the gas generating system, a gas bypass branch is connected between a gas inlet pipeline of the high-pressure stage variable geometry turbine and a gas outlet pipeline of the high-pressure stage variable geometry turbine, and a sequential switching valve, a flowmeter V4 and a gas bypass valve are arranged on the gas bypass branch.
Description
Technical Field
The invention relates to the technical field of turbochargers, in particular to a basic module test platform and a test method of a two-stage sequential supercharging system.
Background
With the development of the diesel engine technology towards the high supercharging direction, the diesel engine system has developed the research of the matching technology of a two-stage sequential supercharger system, and the two-stage sequential supercharger system adopts the key accessories such as a turbocharger, an intercooler, a switching valve, an air bypass valve, a gas bypass valve and the like, so that the performance and the reliability of the two-stage sequential supercharger system of the diesel engine are directly related. The components such as the supercharger, the valve and the like which are not fully tested and verified are arranged on the two-stage sequential supercharging system of the diesel engine, the performance and the reliability of the whole system are not ensured, and the testing risk and the cost of the two-stage sequential supercharging system are increased. Therefore, in order to solve the problems of performance and reliability verification of the supercharger and the valve for the two-stage sequential supercharging system, designing and a basic module test platform of the two-stage sequential supercharging system are effective methods.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a basic module test platform and a test method of a two-stage sequential supercharging system, which are used for providing a pressure ratio distribution scheme for selecting a supercharger for the two-stage sequential supercharging system and checking the reliability of the supercharger, sequential valves and other parts.
The purpose of the invention is realized in the following way:
The utility model provides a basic module test platform of two-stage sequential pressurization system which characterized in that: the system comprises a gas generating system, a high-pressure stage booster and a low-pressure stage booster;
The high-pressure stage supercharger comprises a high-pressure stage compressor and a high-pressure stage variable geometry turbine, the low-pressure stage supercharger comprises a low-pressure stage compressor and a low-pressure stage variable geometry turbine, the high-pressure stage variable geometry turbine is connected with the low-pressure stage variable geometry turbine in series, the low-pressure stage variable geometry turbine is connected with the high-pressure stage variable geometry turbine in series, the intercooler is connected between the low-pressure stage compressor and the high-pressure stage compressor in series, the inlet of the high-pressure stage variable geometry turbine is connected with the outlet of the gas generating system, the outlet of the high-pressure stage compressor is connected with an air main branch and an air auxiliary branch, wherein the air main branch is connected with the air inlet of the gas generating system, the air auxiliary branch is connected with the gas outlet of the gas generating system, the air inlet pipeline of the low-pressure stage compressor is provided with a pressure P1 and a temperature T1 measuring point, the pressure P2 and temperature T2 measuring points are arranged on the connecting pipeline of the low-pressure-stage gas compressor and the intercooler, the pressure P3 and temperature T3 measuring points are arranged on the connecting pipeline of the intercooler and the high-pressure-stage gas compressor, the flowmeter V1, the pressure P4 and temperature T4 measuring points are arranged on the outlet pipeline of the high-pressure-stage gas compressor, the air bypass valve and the flowmeter V2 are arranged on the air secondary branch, the flowmeter V3, the pressure P5 and temperature T5 measuring points are arranged on the inlet pipeline of the high-pressure-stage variable geometry turbine gas, the pressure P7 and temperature T7 measuring points are arranged on the outlet pipeline of the high-pressure-stage variable geometry turbine gas, the pressure P8 and temperature T8 measuring points are arranged on the inlet pipeline of the low-pressure-stage variable geometry turbine gas, and the pressure P9 and temperature T9 measuring points are arranged on the outlet pipeline of the low-pressure-stage variable geometry turbine gas;
A gas bypass branch is connected between the high-pressure stage variable geometry turbine gas inlet pipeline and the high-pressure stage variable geometry turbine gas outlet pipeline, and a sequential switching valve, a flowmeter V4, a gas bypass valve and gas inlet pressure P6 and temperature T6 measuring points are arranged on the gas bypass branch.
Preferably, the system also comprises a lubricating oil system, wherein the lubricating oil system provides lubricating oil for the high-pressure stage booster and the low-pressure stage booster, a pressure P12 and a temperature T12 measuring point are arranged on an inlet oil pipeline of the high-pressure stage booster, and a temperature T13 measuring point is arranged on an oil return pipeline of the high-pressure stage booster; the inlet oil pipeline of the low-pressure stage supercharger is provided with a pressure P10 and temperature T10 measuring point, and the oil return pipeline is provided with a temperature T11 measuring point; the oil pressure of the lubricating oil system can be adjusted.
Preferably, the gas generating system comprises a combustor, a wind source valve, a bleed valve and a self-circulation valve, wherein the wind source valve and the combustor are connected in series, an outlet of the combustor is a gas generating system outlet, the gas generating system outlet is connected with a high-pressure stage variable geometry turbine gas inlet pipeline, the bleed valve is connected with a high-pressure stage gas compressor outlet pipeline through a pipeline, an inlet of the bleed valve is an air inlet of the gas generating system, and the self-circulation valve is connected between an upstream end of the bleed valve and a downstream end of the wind source valve.
Preferably, the rotating speed N1 and the vibration M1 measuring points are arranged on the low-pressure-stage supercharger, and the rotating speed N2 and the vibration M2 measuring points are arranged on the high-pressure-stage supercharger.
Preferably, the burner adopts a straight cylinder combustion chamber, and a plurality of groups of oil nozzles are distributed in the straight cylinder combustion chamber, so that the simulation of different working conditions of the diesel engine system can be realized.
Preferably, the low pressure stage variable geometry turbine is in series with a low pressure stage compressor.
Preferably, the flow of the inlet water and the outlet water on the intercooler is regulated by a water inlet valve and a water return valve.
Preferably, the system further comprises a measurement control system, wherein the measurement control system is connected with each device and is used for controlling each device and measuring parameters.
A test method for basic modules of a two-stage sequential supercharging system,
S1: before the test starts, starting a lubricating oil system to supply lubricating oil for the high-pressure-stage supercharger and the low-pressure-stage supercharger, keeping the lubricating oil pressure at 2-3 bar for 10 minutes, checking whether the high-pressure-stage supercharger and the low-pressure-stage supercharger have lubricating oil leakage, and testing the lubricating oil sealing performance of the supercharger in the stalling state of the two-stage sequential supercharger system of the simulated diesel engine;
s2, opening a water inlet valve and a water return valve on the intercooler, keeping the water inflow of one intercooler, and monitoring the temperature of an air outlet of the intercooler 7;
S3: the air bypass valve, the self-circulation valve, the sequential switching valve and the gas bypass valve are in a closed state; opening a self-circulation valve after compressed air is introduced into the compressed air ignition burner by opening the air source valve, and closing the air release valve and the air source valve to enable the platform to enter a self-circulation test state;
S4: the small flow performance of the constant-speed line of the two-stage sequential supercharging system is tested by adjusting the oil injection quantity of the combustor and the opening of the self-circulation valve;
S5: the high-flow performance test of the two-stage sequential supercharging system at the same rotating speed is realized by adjusting the oil injection quantity and the opening of the air release valve of the burner;
S6: repeating the steps S5 and S6 to realize the test of the operation condition of the two-stage sequential supercharging system;
S7: the flow sections of the high-pressure-stage variable geometry turbine and the low-pressure-stage variable geometry turbine are adjusted through a test bed control system, and the steps S4, S5 and S6 are repeated, so that the pressure ratio distribution performance test of the basic modules of the two-stage sequential supercharging system is realized;
S8: the cooling water quantity entering the intercooler is regulated, and the steps S4, S5 and S6 are repeated, so that the influence performance test of the cooling performance of the intercooler on the two-stage sequential supercharging system under different working conditions is realized;
S9: the steps S4, S5 and S6 are repeated by adjusting different opening degrees of the air bypass valve, so that the performance test of the influence of the opening degrees of the air bypass valve on the sequential systems of the two-stage supercharger under different working conditions is realized;
s10: the different opening degrees of the gas bypass valve are adjusted by opening the successive switching valve, and the steps S4, S5 and S6 are repeated, so that the influence performance test of the opening degrees of the gas bypass valve on the successive systems of the two-stage supercharger under different working conditions is realized;
S11: closing the sequential switching valve and the gas bypass valve, repeating the steps S4, S5 and S6, and measuring the leakage quantity when the sequential switching valve is closed through a flowmeter V4 on the gas bypass branch;
and closing the gas bypass valve, and opening and closing the sequential switching valve to realize the reliability test of the sequential switching valve under the high-temperature and high-pressure conditions.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
The method can test and verify the matching performance of the two-stage sequential supercharging system and the supercharger, the lubricating oil sealing, the intercooler performance, the reliability of the sequential switching valve and the like, solves the problems of key component performance and reliability for the two-stage sequential supercharging system of the diesel engine, improves the reliability of the two-stage supercharger system and reduces the test risk and cost of the two-stage supercharger system.
Drawings
FIG. 1 is a schematic diagram of a system according to the present invention.
Reference numerals
In the drawing, 1 is a bleed valve, 2 is a self-circulation valve, 3 is a flow meter V2,4 is an air bypass valve, 5 is a flow meter V1,6 is a high-pressure stage supercharger, 6a is a high-pressure stage compressor, 6b is a high-pressure stage variable geometry turbine, 7 is an intercooler, 8 is a low-pressure stage supercharger, 8a is a low-pressure stage compressor, 8b is a low-pressure stage variable geometry turbine, 9 is a lubricating oil system, 10 is a gas bypass valve, 11 is a flow meter V4, 12 is a sequential switching valve, 13 is a flow meter V3, 14 is a combustor, 15 is a small air source valve, 16 is a gas generating system, and 17 is a measurement control system.
Detailed Description
Referring to fig. 1, a two-stage sequential pressurization system basic module test platform specifically includes a gas generating system 16, a lubricating oil system 9, a measurement control system 17, a high-pressure stage booster 6, a low-pressure stage booster 8, an intercooler 7, a sequential switching valve 12, and the like. The measurement control system 17 is connected to each device (including all the components that can be controlled) for controlling each device and making parameter measurements at each station. The platform can simulate the matching performance operation of a two-stage sequential supercharged diesel engine system and a supercharger.
The gas generating system 16 consists of a burner 14, a small air source valve 15, a gas release valve 1 and a self-circulation valve 2, can simulate a diesel engine gas generating system to manufacture gas, and provides a power source for a two-stage sequential pressurization system test platform. The burner 14 adopts a straight cylinder combustion chamber, and 8+4 groups of oil nozzles are distributed in the combustion chamber, so that the simulation of different working conditions of the diesel engine system can be realized. The small air source valve 15 is connected with an air source system, so that the two-stage sequential supercharged diesel engine system can be simulated to improve fuel gas under different working conditions, and the test platform is driven to work.
The high-pressure stage booster 6 is connected with the low-pressure stage booster 8 in series, wherein an intercooler 7 is connected between the low-pressure stage compressor 8a and the high-pressure stage compressor 6a in series, water flow on the intercooler can be automatically controlled, and the air inlet temperature of the high-pressure stage booster compressor can be adjusted. The outlet of the high-pressure stage compressor 6a is provided with a main air branch and an auxiliary air branch, wherein the main air branch is connected to the air inlet of the gas generating system, and the auxiliary air branch is connected to the gas outlet of the gas generating system. The air main branch is connected into the gas generating system through the self-circulation valve 2. The air release valve 1 is directly communicated with the atmosphere, and is not connected with the small air source valve 15. The pressure P1 and temperature T1 measuring points are arranged on the air inlet pipeline of the low-pressure-stage compressor, the pressure P2 and temperature T2 measuring points are arranged on the connecting pipeline of the low-pressure-stage compressor and the intercooler 7, the pressure P3 and temperature T3 measuring points are arranged on the connecting pipeline of the intercooler and the high-pressure-stage compressor, and the flowmeter V1, the pressure P4 and the temperature T4 measuring points are arranged on the outlet pipeline of the high-pressure-stage compressor, so that the measurement of the performance parameters of the high-pressure-stage compressor 6a, the low-pressure-stage compressor 6b and the system is realized. The turbine and the air compressor are connected in series, the air compressor impeller and the turbine are arranged on the same shaft, and the turbine drives the air compressor impeller to perform the function of compressing air.
The air bypass valve 4 and the flowmeter V2 are arranged on the air auxiliary branch, so that the measurement of the influence of the opening performance of the air bypass valve on the system can be realized.
The high-pressure stage variable geometry turbine and the low-pressure stage variable geometry turbine are connected in series through a pipeline, and an inlet of the high-pressure stage variable geometry turbine is connected with an outlet of the gas generation system; the high-pressure stage variable geometry turbine gas inlet pipeline is provided with a flowmeter V3, a pressure P5 and a temperature T5 measuring point, and the high-pressure stage variable geometry turbine gas outlet pipeline is provided with a pressure P7 and a temperature T7 measuring point; the low-pressure-stage variable geometry turbine gas inlet pipeline is provided with pressure P8 and temperature T8 measuring points, and the low-pressure-stage variable geometry turbine gas outlet pipeline is provided with pressure P9 and temperature T9 measuring points; measurement of the high-pressure stage variable geometry turbine 6b, the low-pressure stage variable geometry turbine 8b and system performance parameters is achieved.
And a gas bypass branch is arranged between the high-pressure stage variable geometry turbine 6b and the low-pressure stage variable geometry turbine 8b, and test points of the sequential switching valve 12, the flowmeter V4, the gas bypass valve 10, the gas inlet pressure P6 and the temperature T6 are arranged on the gas bypass branch, so that test verification of the sealing performance of the sequential switching valve 12, the opening performance and the reliability of the gas bypass valve 10 can be realized. The two-stage sequential pressurizing system basic module test platform is provided with the sequential switching valve and the leakage flow measuring device, so that the test device can be used for performing performance and switch reliability assessment tests under high-temperature and high-pressure gas conditions.
The flow of water inlet and outlet on the intercooler 7 is adjustable, and the influence of the cooling performance of the intercooler 7 on the efficiency of the two-stage sequential supercharger system can be tested and tested.
The high-pressure stage booster turbine 6b and the low-pressure stage booster turbine 8b adopt variable geometry turbine designs, and the flow areas of the high-pressure stage booster turbine 6b and the low-pressure stage booster turbine 8b can be adjusted through the test control system 17, so that the purposes of simulating two-stage sequential booster system pressure ratio distribution tests are achieved.
The lubrication system 9 provides pressure lubrication to the high pressure stage supercharger 6 and the low pressure stage supercharger 8. The inlet oil pipeline of the high-pressure stage supercharger 6 is provided with a pressure P12 and temperature T12 measuring point, and the oil return pipeline is provided with a temperature T13 measuring point; the inlet oil pipeline of the low-pressure stage supercharger 8 is provided with a pressure P10 and temperature T10 measuring point, and the oil return pipeline is provided with a temperature T11 measuring point; the device is used for measuring the inlet and outlet lubricating oil parameters of the high-pressure stage booster 6 and the low-pressure stage booster. The oil pressure of the lubricating oil system 9 is adjustable, and the oil supply characteristic of the supercharger system of the two-stage sequential system can be tested to guide the design of the lubricating oil supply system of the two-stage sequential supercharging system. The lubricating system has the functions of adjustable lubricating oil pressure and emergency lubricating oil, and can simulate the oil supply working condition of a two-stage sequential supercharged diesel engine system to a supercharger, thereby realizing the lubricating oil sealing test of the sequential supercharger system.
The rotating speed N1 and the vibration M1 measuring points are arranged on the low-pressure-stage supercharger 8, and the rotating speed N2 and the vibration M2 measuring points are arranged on the high-pressure-stage supercharger 6 and used for monitoring safe operation parameters of the high-pressure-stage supercharger 6 and the low-pressure-stage supercharger 8.
The test method for the basic module of the two-stage sequential supercharging system comprises the following steps:
S1: before the test of the basic modules of the two-stage sequential supercharging system is started, a lubricating oil system 9 is started to supply lubricating oil to the high-pressure-stage supercharger 6 and the low-pressure-stage supercharger 8, the lubricating oil pressure is kept at 2-3 bar for 10 minutes, whether the lubricating oil leaks from the high-pressure-stage supercharger 6 and the low-pressure-stage supercharger 8 or not is checked, and the lubricating oil sealing performance of the supercharger in the stalling state of the two-stage sequential supercharging system of the diesel engine is simulated in the test.
S2, opening a water inlet valve and a water return valve on the intercooler 7, keeping a certain water inlet amount of the intercooler, and monitoring the temperature of an air outlet of the intercooler 7.
S3: the air bypass valve 4, the self-circulation valve 2, the sequential switching valve 12 and the gas bypass valve 10 are in a closed state; after the compressed air is introduced into the compressed air ignition burner 14 by opening the small air source valve 15, the self-circulation valve 2 is opened, and the air release valve 1 and the small air source valve 15 are closed, so that the basic module test platform of the two-stage sequential supercharging system enters a self-circulation test state.
S4: the small flow performance of the rotational speed line of the two-stage sequential supercharging system is tested by adjusting the oil injection quantity of the combustor 14 and the opening of the self-circulation valve 2.
S5: the test of the rotating speed and large flow performance of the two-stage sequential supercharging system is realized by adjusting the oil injection quantity of the combustor 14 and the opening of the air release valve 1.
S6: and S5, repeating the steps S6, and realizing the test of the running condition of the continuous system of the whole two-stage supercharger.
S7: and through-flow sections of the high-pressure stage variable geometry turbine 6b and the low-pressure stage variable geometry turbine 8b are automatically adjusted through the test bed control system 17, and the steps S4, S5 and S6 are repeated, so that the pressure ratio distribution performance test of the sequential system basic modules of the two-stage supercharger is realized.
S8: and by adjusting the cooling water quantity entering the intercooler 7, repeating the steps S4, S5 and S6, the performance test of the influence of the cooling performance of the intercooler 7 on the sequential system of the two-stage supercharger under different working conditions is realized.
S9: and by adjusting different opening degrees of the air bypass valve 4, repeating the steps S4, S5 and S6, and realizing the performance test of the influence of the opening degrees of the air bypass valve 4 on the two-stage supercharger successive system under different working conditions.
S10: and (3) by opening the sequential switching valve 12, adjusting different opening degrees of the gas bypass valve 10, repeating the steps S4, S5 and S6, and realizing the performance test of the influence of the opening degrees of the gas bypass valve 10 on the sequential system of the two-stage supercharger under different working conditions.
S11: closing the successive switching valve 12 and the gas bypass valve 10, repeating steps S4, S5, S6, measuring the leakage amount when the successive switching valve 12 is closed by measuring V4 by means of a flow meter on the gas bypass branch; the gas bypass valve 10 is closed, and the sequential switching valve 12 is opened and closed, so that the reliability test of the sequential switching valve 12 under the high-temperature and high-pressure conditions is realized.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (8)
1. A basic module test method of a two-stage sequential supercharging system is characterized by comprising the following steps of: the system comprises a two-stage sequential supercharging system basic module test platform, wherein the two-stage sequential supercharging system basic module test platform comprises a gas generating system, a high-pressure stage supercharger and a low-pressure stage supercharger;
The high-pressure stage supercharger comprises a high-pressure stage compressor and a high-pressure stage variable geometry turbine, the low-pressure stage supercharger comprises a low-pressure stage compressor and a low-pressure stage variable geometry turbine, the high-pressure stage variable geometry turbine is connected with the low-pressure stage variable geometry turbine in series, the low-pressure stage variable geometry turbine is connected with the high-pressure stage variable geometry turbine in series, an intercooler is connected between the low-pressure stage compressor and the high-pressure stage compressor in series, an inlet of the high-pressure stage variable geometry turbine is connected with an outlet of a gas generating system, an outlet of the high-pressure stage compressor is connected with an air main branch and an air auxiliary branch, wherein the air main branch is connected with an air inlet of the gas generating system, the air auxiliary branch is connected with a gas outlet of the gas generating system, a pressure P1 and a temperature T1 measuring point are arranged on an air inlet pipeline of the low-pressure stage compressor, the pressure P2 and temperature T2 measuring points are arranged on the connecting pipeline of the low-pressure-stage gas compressor and the intercooler, the pressure P3 and temperature T3 measuring points are arranged on the connecting pipeline of the intercooler and the high-pressure-stage gas compressor, the flowmeter V1, the pressure P4 and temperature T4 measuring points are arranged on the outlet pipeline of the high-pressure-stage gas compressor, the air bypass valve and the flowmeter V2 are arranged on the air secondary branch, the flowmeter V3, the pressure P5 and temperature T5 measuring points are arranged on the inlet pipeline of the high-pressure-stage variable geometry turbine gas, the pressure P7 and temperature T7 measuring points are arranged on the outlet pipeline of the high-pressure-stage variable geometry turbine gas, the pressure P8 and temperature T8 measuring points are arranged on the inlet pipeline of the low-pressure-stage variable geometry turbine gas, and the pressure P9 and temperature T9 measuring points are arranged on the outlet pipeline of the low-pressure-stage variable geometry turbine gas;
A gas bypass branch is connected between the high-pressure stage variable geometry turbine gas inlet pipeline and the high-pressure stage variable geometry turbine gas outlet pipeline, and a sequential switching valve, a flowmeter V4, a gas bypass valve and gas inlet pressure P6 and temperature T6 measuring points are arranged on the gas bypass branch;
S1: before the test starts, starting a lubricating oil system to supply lubricating oil for the high-pressure-stage supercharger and the low-pressure-stage supercharger, keeping the lubricating oil pressure at 2-3 bar for 10 minutes, checking whether the high-pressure-stage supercharger and the low-pressure-stage supercharger have lubricating oil leakage, and testing the lubricating oil sealing performance of the supercharger in the stalling state of the two-stage sequential supercharger system of the simulated diesel engine;
s2, opening a water inlet valve and a water return valve on the intercooler, keeping the water inflow of one intercooler, and monitoring the temperature of an air outlet of the intercooler 7;
S3: the air bypass valve, the self-circulation valve, the sequential switching valve and the gas bypass valve are in a closed state; opening a self-circulation valve after compressed air is introduced into the compressed air ignition burner by opening the air source valve, and closing the air release valve and the air source valve to enable the platform to enter a self-circulation test state;
S4: the small flow performance of the constant-speed line of the two-stage sequential supercharging system is tested by adjusting the oil injection quantity of the combustor and the opening of the self-circulation valve;
S5: the high-flow performance test of the two-stage sequential supercharging system at the same rotating speed is realized by adjusting the oil injection quantity and the opening of the air release valve of the burner;
S6: repeating the steps S5 and S6 to realize the test of the operation condition of the two-stage sequential supercharging system;
S7: the flow sections of the high-pressure-stage variable geometry turbine and the low-pressure-stage variable geometry turbine are adjusted through a test bed control system, and the steps S4, S5 and S6 are repeated, so that the pressure ratio distribution performance test of the basic modules of the two-stage sequential supercharging system is realized;
S8: the cooling water quantity entering the intercooler is regulated, and the steps S4, S5 and S6 are repeated, so that the influence performance test of the cooling performance of the intercooler on the two-stage sequential supercharging system under different working conditions is realized;
S9: the steps S4, S5 and S6 are repeated by adjusting different opening degrees of the air bypass valve, so that the performance test of the influence of the opening degrees of the air bypass valve on the sequential systems of the two-stage supercharger under different working conditions is realized;
s10: the different opening degrees of the gas bypass valve are adjusted by opening the successive switching valve, and the steps S4, S5 and S6 are repeated, so that the influence performance test of the opening degrees of the gas bypass valve on the successive systems of the two-stage supercharger under different working conditions is realized;
S11: closing the sequential switching valve and the gas bypass valve, repeating the steps S4, S5 and S6, and measuring the leakage quantity when the sequential switching valve is closed through a flowmeter V4 on the gas bypass branch;
and closing the gas bypass valve, and opening and closing the sequential switching valve to realize the reliability test of the sequential switching valve under the high-temperature and high-pressure conditions.
2. The two-stage sequential supercharging system basic module test method according to claim 1, characterized in that: the system also comprises a lubricating oil system, wherein the lubricating oil system provides lubricating oil for the high-pressure stage booster and the low-pressure stage booster, a pressure P12 and a temperature T12 measuring point are arranged on an inlet oil pipeline of the high-pressure stage booster, and a temperature T13 measuring point is arranged on an oil return pipeline of the high-pressure stage booster; the inlet oil pipeline of the low-pressure stage supercharger is provided with a pressure P10 and temperature T10 measuring point, and the oil return pipeline is provided with a temperature T11 measuring point; the oil pressure of the lubricating oil system can be adjusted.
3. The two-stage sequential supercharging system basic module test method according to claim 1, characterized in that: the gas generation system comprises a combustor, a wind source valve, a gas release valve and a self-circulation valve, wherein the wind source valve and the combustor are connected in series, the outlet of the combustor is a gas generation system outlet, the gas generation system outlet is connected with a high-pressure-stage variable geometry turbine gas inlet pipeline, the gas release valve is connected with a high-pressure-stage gas compressor outlet pipeline through a pipeline, the inlet of the gas release valve is an air inlet of the gas generation system, and the self-circulation valve is connected between the upstream end of the gas release valve and the downstream end of the wind source valve.
4. The two-stage sequential supercharging system basic module test method according to claim 1, characterized in that: the low-pressure-stage supercharger is provided with a rotating speed N1 and a vibration M1 measuring point, and the high-pressure supercharger is provided with a rotating speed N2 and a vibration M2 measuring point.
5. The two-stage sequential supercharging system basic module test method according to claim 1, characterized in that: the burner adopts a straight cylinder combustion chamber, and a plurality of groups of oil nozzles are distributed in the straight cylinder combustion chamber, so that the simulation of different working conditions of the diesel engine system can be realized.
6. The two-stage sequential supercharging system basic module test method according to claim 1, characterized in that: the low-pressure stage variable geometry turbine is connected in series with a low-pressure stage compressor.
7. The two-stage sequential supercharging system basic module test method according to claim 1, characterized in that: the flow of water inlet and water outlet on the intercooler is regulated by a water inlet valve and a water return valve.
8. A two-stage sequential supercharging system base module test method according to any one of claims 1 to 7, characterized in that: the system also comprises a measurement control system which is connected with each device and used for controlling each device and measuring parameters.
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| CN202210106730.4A CN114486271B (en) | 2022-01-28 | Basic module test platform and test method for two-stage sequential supercharging system |
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| CN202210106730.4A CN114486271B (en) | 2022-01-28 | Basic module test platform and test method for two-stage sequential supercharging system |
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| CN104234820A (en) * | 2014-09-09 | 2014-12-24 | 韩志强 | Two-staged turbocharging system testing device and testing method |
| CN111076941A (en) * | 2019-12-30 | 2020-04-28 | 中国人民解放军陆军军事交通学院 | double-VGT two-stage adjustable supercharger test system |
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| CN104234820A (en) * | 2014-09-09 | 2014-12-24 | 韩志强 | Two-staged turbocharging system testing device and testing method |
| CN111076941A (en) * | 2019-12-30 | 2020-04-28 | 中国人民解放军陆军军事交通学院 | double-VGT two-stage adjustable supercharger test system |
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