CN112031974A - High-power high-pressure common rail system comprehensive test bed and high-pressure oil pump test method - Google Patents
High-power high-pressure common rail system comprehensive test bed and high-pressure oil pump test method Download PDFInfo
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- CN112031974A CN112031974A CN202011084830.9A CN202011084830A CN112031974A CN 112031974 A CN112031974 A CN 112031974A CN 202011084830 A CN202011084830 A CN 202011084830A CN 112031974 A CN112031974 A CN 112031974A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
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Abstract
The invention provides a comprehensive test bed of a high-power high-pressure common rail system and a high-pressure oil pump test method, which comprise the following steps: the system comprises a basic rack system, a fuel supply system, a lubricating oil supply system, a measurement and control system and an auxiliary system; the output end of a high-pressure oil pump to be tested is connected with a high-pressure common rail pipe through a high-pressure oil pipe, the high-pressure common rail pipe is connected with an oil sprayer through the high-pressure oil pipe, the measurement and control system is connected with the oil sprayer to control oil spraying of the oil sprayer, sprayed fuel oil passes through the auxiliary system and returns to the fuel oil supply system after entering the fuel oil transfer oil tank after entering the measurement and control system, and lubricating oil in the oil sprayer passes through the auxiliary system and returns to the lubricating oil supply system after entering the lubricating oil transfer oil tank after entering the measurement and control system. The invention can realize the related performance tests such as the safety function verification of the pressure limiting valve of the whole system, the multi-cylinder consistency correction verification test of the high-pressure common rail system, the oil supply redundancy performance index verification of the system and the like, and can efficiently complete the reliability index verification test of the system.
Description
Technical Field
The invention relates to the field of diesel engine testing, in particular to a comprehensive test bed of a high-power high-pressure common rail system and a high-pressure oil pump test method.
Background
In high power diesel engines, the fuel system is generally classified into a mechanical type and a high pressure common rail type. The high-pressure common rail technology is one of the main technical characteristics of the third-generation X-boat diesel engine. In the common rail technology, a high-pressure oil pump conveys high-pressure fuel oil into a rail pipe, and the oil pressure in the rail pipe is accurately controlled, so that the pressure of the high-pressure oil pipe is irrelevant to the rotating speed of an engine, and the variation of the oil supply pressure of a diesel engine along with the rotating speed of the engine can be greatly reduced, thereby reducing the defects of the traditional diesel engine. And the ECU electronic management system controls the opening time of the electromagnetic valve of the oil injector so as to realize accurate control of the oil quantity. The high-pressure common rail system has the characteristics of high injection pressure, flexible control of injection timing and the like, can optimize the oil consumption, vibration and noise of the diesel engine in the full working condition range, and can reduce the average oil consumption by more than 5 percent in the full working condition.
Patent document CN104847557A discloses a diesel oil spraying characteristic detection test device for a high-pressure common rail system, which can be used for simulating diesel oil spraying characteristic detection of a single-hole oil injector or a multi-hole oil injector; the spray penetration distance and the spray cone angle can be measured, and the spray shape of the porous oil sprayer can be measured; the total oil injection quality of the rated oil injection times of the oil injector can be measured, and the change of the oil injection quantity under different injection pressures and different backpressure (high-pressure air chamber pressure) states can be conveniently compared; the detection of the spraying characteristic under the state of back pressure and spraying pressure change can be realized.
At present, in the aspect of a high-pressure common rail system test board, a design scheme of a system test board of a single oil injector or a half-side system is generally adopted to perform a performance test and a reliability test of an electric control common rail system, and platform test research of a whole system level cannot be realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a comprehensive test bed of a high-power high-pressure common rail system and a high-pressure oil pump test method.
The invention provides a comprehensive test bed for a high-power high-pressure common rail system, which comprises:
basic rack system: providing a driving and mounting platform of a high-pressure oil pump to be tested;
fuel supply system: the basic rack system is connected with a high-pressure oil pump to be tested to provide fuel oil with preset pressure and temperature required by the high-pressure oil pump to be tested;
oil supply system: the basic rack system is connected with a high-pressure oil pump to be tested to provide lubricating oil with preset pressure and temperature required by the high-pressure oil pump to be tested;
measurement and control system: the basic rack system, the fuel oil supply system and the lubricating oil supply system are connected to monitor, measure and control pressure, temperature and flow;
an auxiliary system: connecting the basic rack system, the fuel supply system and the oil supply system to cool the basic rack system, the fuel supply system and the oil supply system;
the output end of a high-pressure oil pump to be tested is connected with a high-pressure common rail pipe through a high-pressure oil pipe, the high-pressure common rail pipe is connected with an oil sprayer through the high-pressure oil pipe, the measurement and control system is connected with the oil sprayer to control oil spraying of the oil sprayer, sprayed fuel oil passes through the auxiliary system and returns to the fuel oil supply system after entering the fuel oil transfer oil tank after entering the measurement and control system, and lubricating oil in the oil sprayer passes through the auxiliary system and returns to the lubricating oil supply system after entering the lubricating oil transfer oil tank after entering the measurement and control system.
Preferably, the base gantry system comprises: the system comprises a rack, a servo motor, a servo controller and a gear box;
the servo controller is electrically connected with the servo motor and is jointly fixed on the rack, and the output end of the servo motor is connected with the high-pressure oil pump to be tested through the gear box.
Preferably, the fuel supply system includes: the cooling oil pump is connected with the oil tank;
a heating rod is arranged in the oil tank;
the input end of the cooling oil pump is connected with the fuel oil transfer oil tank through a filter, a flowmeter and a thermometer of the measurement and control system, and the output end of the cooling oil pump is connected with the oil tank;
the input end of the oil supply oil pump is connected with the oil tank, and the output end of the oil supply oil pump is connected with a high-pressure oil pump to be tested through the basic rack system.
Preferably, the fuel supply system further includes:
the oil tank cleaning hole is formed in the oil tank and is sealed through a detachably connected cover plate;
the oil disc is arranged at the bottom of the oil tank and used for collecting fuel oil leaked from the oil tank, and a leakage detection sensor is arranged in the oil disc;
and a liquid level sensor and a temperature sensor are arranged in the oil tank.
Preferably, the oil supply system includes: the cooling oil pump is connected with the oil tank;
a heating rod is arranged in the oil tank;
the input end of the cooling oil pump is connected with the lubricating oil transfer oil tank through a flowmeter and a thermometer of the measurement and control system, and the output end of the cooling oil pump is connected with the oil tank;
the input end of the oil supply oil pump is connected with the oil tank, and the output end of the oil supply oil pump is connected with a high-pressure oil pump to be tested through the basic rack system.
Preferably, the oil supply system further includes:
the oil tank cleaning hole is formed in the oil tank and is sealed through a detachably connected cover plate;
the oil pan is arranged at the bottom of the oil tank and used for collecting lubricating oil leaked from the oil tank, and a leakage detection sensor is arranged in the oil pan;
and a liquid level sensor and a temperature sensor are arranged in the oil tank.
Preferably, the measurement and control system adopts a positive displacement flowmeter, and data acquisition is carried out through a PLC and is transmitted to an upper computer, so that the monitoring, measurement and control of the pressure, the temperature and the flow of the test bed are realized.
Preferably, the assistance system comprises: a refrigerating unit, an air compressor and a heat exchanger;
chilled water output by the refrigerating unit enters the heat exchanger through a pipeline to perform heat exchange on fuel oil and lubricating oil in the heat exchanger, compressed air output by the air compressor enters the main shaft of the gear box of the basic rack system through the pipeline and the filter, and an air seal is formed through air pressure to prevent the lubricating oil from permeating the main shaft.
Preferably, the method further comprises the following steps: a security protection system;
the safety protection system is connected with the basic rack system, the fuel oil supply system and the lubricating oil supply system, monitors preset safety parameters, and gives an alarm and stops when the preset safety parameters exceed a preset range.
According to the high-pressure oil pump test method provided by the invention, the high-pressure oil pump is tested by adopting the comprehensive test bed of the high-power high-pressure common rail system.
Compared with the prior art, the invention has the following beneficial effects:
1. the modular design is adopted, so that the maintainability and the reliability of the equipment are facilitated; and a lumped distributed control system is adopted, so that the flexibility of equipment control is enhanced. Through the design of the test bed, the related performance tests such as the safety function verification of the pressure limiting valve of the whole system, the multi-cylinder consistency correction verification test of the high-pressure common rail system, the oil supply redundancy performance index verification of the system and the like can be realized, and meanwhile, the reliability index verification test of the system can be efficiently completed.
2. The device has the advantages of simple structure, easy assembly, compact arrangement and lower cost, and can be used for the endurance test of the high-pressure common rail system platform.
3. Due to the real-time property of pressure fluctuation transmission, the device can realize real-time and single fault detection under the platform condition, and can carry out detailed monitoring and analysis on more typical faults, such as injection formal faults, needle valve opening and closing processes, circulating oil injection quantity and oil injection duration and the like, and more comprehensive technical indexes compared with the traditional methods such as electric signal monitoring and the like.
4. The test bed is initiated at home, the technical level reaches advanced domestic and international advanced levels, a necessary test carrier is provided for important research projects in research at home, various important performance and reliability tests are carried out for 5000 hours, the technical maturity of the test bed is fully verified, the progress of autonomous development of the electric control high-pressure common rail of the high-power marine diesel engine is powerfully guaranteed, and therefore the autonomous development of a new generation of high-power medium-high speed diesel engine is supported, and the test bed has very important significance for promoting the autonomy of power equipment of the new generation of diesel engine.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a system framework diagram of the present invention;
FIG. 2 is a schematic structural view of a fuel supply system;
FIG. 3 is a schematic view of a configuration of an oil supply system;
FIG. 4 is a schematic diagram of the auxiliary system;
FIG. 5 is a simplified schematic diagram of the oil circuit of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1, the comprehensive test bed for a high-power high-pressure common rail system provided by this embodiment includes: basic rack system, fuel feed system, lubricating oil feed system, observing and controlling system, auxiliary system and security protection system. The output end of a high-pressure oil pump to be tested is connected with a high-pressure common rail pipe through a high-pressure oil pipe, the high-pressure common rail pipe is connected with an oil sprayer through the high-pressure oil pipe, the measurement and control system is connected with the oil sprayer to control oil spraying of the oil sprayer, sprayed fuel oil passes through the auxiliary system and returns to the fuel oil supply system after entering the fuel oil transfer oil tank after entering the measurement and control system, and lubricating oil in the oil sprayer passes through the auxiliary system and returns to the lubricating oil supply system after entering the lubricating oil transfer oil tank after entering the measurement and control system.
Basic rack system is used for providing the drive and the mounting platform of waiting to test high-pressure oil pump, includes: rack, servo motor, servo controller and gear box. The servo controller is electrically connected with the servo motor and is jointly fixed on the rack, and the output end of the servo motor is connected with the high-pressure oil pump to be tested through the gear box. The rack is used for manufacturing a whole-system mounting bracket through three-dimensional model processing so as to realize mounting and fixing of the common rail system.
The fuel supply system is connected with the high-pressure oil pump to be tested through the basic rack system and provides fuel oil with preset pressure and temperature required by the high-pressure oil pump to be tested. As shown in fig. 2, the fuel supply system includes: a tank 11, a cooling oil pump 12, and a supply oil pump 13. A heating rod 14 is provided in the fuel tank 11 for heating the fuel in the fuel tank 11 to a desired temperature. The input end of the cooling oil pump 12 is connected with a fuel oil transfer oil tank through a filter, a flow meter and a thermometer of the measurement and control system, and the output end of the cooling oil pump 12 is connected with the oil tank 11. The input end of the oil supply pump 13 is connected with the oil tank 11, and the output end of the oil supply pump 13 is connected with the high-pressure oil pump to be tested through the basic rack system after being filtered by the filter 15. The oil tank 11 is provided with an oil tank cleaning hole 16 which is sealed by a detachably connected cover plate 17. The oil pan 18 is arranged at the bottom of the oil tank 11 and used for collecting fuel oil leaked from the oil tank, and a leakage detection sensor 19 is arranged in the oil pan and connected with the measurement and control system through the leakage detection sensor 19. A liquid level sensor 110 and a temperature sensor 111 are arranged in the oil tank, and an electrical control box 112 is arranged on the oil tank and used for controlling the cooling oil pump 12, the oil supply oil pump 13 and the heating rod 14.
The lubricating oil supply system is connected with the high-pressure oil pump to be tested through the basic rack system and provides lubricating oil with preset pressure and temperature required by the high-pressure oil pump to be tested. As shown in fig. 3, the oil supply system includes: a tank 21, a cooling oil pump 22, and a supply oil pump 23. A heating rod 24 is provided in the oil tank 21 for heating the lubricating oil in the oil tank to a desired temperature. The input end of the cooling oil pump 22 is connected with the lubricating oil transfer oil tank through a flow meter and a thermometer of the measurement and control system, and the output end of the cooling oil pump 22 is connected with the oil tank 21. The input end of the oil supply pump 23 is connected with the oil tank 21, and the output end of the oil supply pump 23 is connected with the high-pressure oil pump to be tested through the basic rack system. The tank 21 is provided with a tank cleaning aperture 25 which is sealed by a removable cover plate similar to that of figure 2. The bottom of oil tank 21 is provided with food tray 26, collects the lubricating oil of oil tank leakage, is provided with leak detection sensor 27 in the food tray 26, and leak detection sensor 27 connects the system of observing and controling. An electrical control box 28 is arranged on the oil tank and used for controlling the cooling oil pump 22, the oil supply pump 23 and the heating rod 24. A liquid level sensor and a temperature sensor are also arranged in the oil tank 21, which can be seen in fig. 2 and is not shown in fig. 3.
The measurement and control system is connected with the basic rack system, the fuel supply system and the lubricating oil supply system to monitor, measure and control pressure, temperature and flow. The measurement and control system can realize the electrical measurement and control of the whole set of system and realize the special test function of the key parameters of the system. The system mainly comprises a SIEMENS-S7-300PLC, a porphyry industrial personal computer, a Ni acquisition system, LabVIEW software and an electric circuit control. The fuel oil passes through the high-precision positive displacement flowmeter to form a pulse signal, the NI high-precision acquisition system realizes signal capture, and the industrial personal computer performs data processing calculation through the software system to realize a measurement function. The SIEMENS-S7-300PLC is used for data acquisition and control, sending data to the upper computer, realizing the control of the upper computer through LabVIEW software programming, and further realizing the functions of controlling, starting, monitoring and the like of the whole test stand.
The security protection system can realize the security protection function of the whole system, detect the security elements in the test process, and find that the risk information triggers the emergency stop to ensure the safety of personnel and equipment, and mainly comprises an independent security PLC and software protection. The independent security PLC can realize the measurement and recording of key security parameters of the test bed and monitor security parameters of special items related to safety in real time. Once exceeding the shut down value or the alarm value that set up, PLC can send the instruction of stopping, but the very first time triggers the scram action of test bench, and the motor stall cuts off the power supply to guarantee test equipment's operation safety.
As shown in fig. 4, the auxiliary system is connected to the base stage system, the fuel supply system, and the oil supply system, and cools the base stage system, the fuel supply system, and the oil supply system. The assistance system includes: refrigerating unit, air compressor machine and heat exchanger. Chilled water output by the refrigerating unit enters the heat exchanger through a pipeline to perform heat exchange on fuel oil and lubricating oil in the heat exchanger, compressed air output by the air compressor enters the main shaft of the gear box of the basic rack system through the pipeline and the filter, and an air seal is formed through air pressure to prevent the lubricating oil from permeating the main shaft.
As shown in fig. 5, after the basic rack system, the fuel supply system, the lubricating oil supply system, the measurement and control system and the auxiliary system send out a working instruction, the basic rack system starts the variable frequency motor to drive the high-pressure oil pump to rotate through the coupling and the gear box; the fuel module and the lubricating oil module receive a working instruction and supply fuel and lubricating oil required by the high-pressure oil pump, a rotating plunger of the high-pressure oil pump compresses the fuel to 160MPa, the fuel is conveyed into the high-pressure common rail pipe through a high-pressure oil pipe and then is connected with the oil injector through the high-pressure oil pipe, the oil injector is accurately controlled by the control system to inject oil, normal operation work of the high-pressure common rail system is realized, the injected fuel is collected by the fog dissipation tank, flows into the plate heat exchanger to be cooled, is filtered by the filter and then is conveyed to the flowmeter to measure the oil injection amount, and finally returns to the main oil tank through the fuel pump, so. In the process, the auxiliary system realizes the cooling of the equipment through plate exchange, and the normal operation temperature of the equipment is ensured. The fuel oil system provides fuel oil with certain temperature and pressure required by the high-pressure oil pump, the lubricating oil system provides lubricating oil with certain temperature and pressure required by the oil pump, the basic rack system provides a general driving and mounting platform, and the measurement and control system realizes monitoring measurement and control of the pressure, temperature and flow of the test bed through the PLC. The security protection system realizes the response of key security parameters through an independent PLC, and the safety of the test bed is guaranteed.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The utility model provides a high-power high pressure common rail system combined test platform which characterized in that includes:
basic rack system: providing a driving and mounting platform of a high-pressure oil pump to be tested;
fuel supply system: the basic rack system is connected with a high-pressure oil pump to be tested to provide fuel oil with preset pressure and temperature required by the high-pressure oil pump to be tested;
oil supply system: the basic rack system is connected with a high-pressure oil pump to be tested to provide lubricating oil with preset pressure and temperature required by the high-pressure oil pump to be tested;
measurement and control system: the basic rack system, the fuel oil supply system and the lubricating oil supply system are connected to monitor, measure and control pressure, temperature and flow;
an auxiliary system: connecting the basic rack system, the fuel supply system and the oil supply system to cool the basic rack system, the fuel supply system and the oil supply system;
the output end of a high-pressure oil pump to be tested is connected with a high-pressure common rail pipe through a high-pressure oil pipe, the high-pressure common rail pipe is connected with an oil sprayer through the high-pressure oil pipe, the measurement and control system is connected with the oil sprayer to control oil spraying of the oil sprayer, sprayed fuel oil passes through the auxiliary system and returns to the fuel oil supply system after entering the fuel oil transfer oil tank after entering the measurement and control system, and lubricating oil in the oil sprayer passes through the auxiliary system and returns to the lubricating oil supply system after entering the lubricating oil transfer oil tank after entering the measurement and control system.
2. The high-power high-pressure common rail system comprehensive test bed according to claim 1, wherein the basic rack system comprises: the system comprises a rack, a servo motor, a servo controller and a gear box;
the servo controller is electrically connected with the servo motor and is jointly fixed on the rack, and the output end of the servo motor is connected with the high-pressure oil pump to be tested through the gear box.
3. The high-power high-pressure common rail system comprehensive test bed according to claim 1, wherein the fuel supply system comprises: the cooling oil pump is connected with the oil tank;
a heating rod is arranged in the oil tank;
the input end of the cooling oil pump is connected with the fuel oil transfer oil tank through a filter, a flowmeter and a thermometer of the measurement and control system, and the output end of the cooling oil pump is connected with the oil tank;
the input end of the oil supply oil pump is connected with the oil tank, and the output end of the oil supply oil pump is connected with a high-pressure oil pump to be tested through the basic rack system.
4. The high power high pressure common rail system integrated test bed according to claim 3, wherein the fuel supply system further comprises:
the oil tank cleaning hole is formed in the oil tank and is sealed through a detachably connected cover plate;
the oil disc is arranged at the bottom of the oil tank and used for collecting fuel oil leaked from the oil tank, and a leakage detection sensor is arranged in the oil disc;
and a liquid level sensor and a temperature sensor are arranged in the oil tank.
5. The high power high pressure common rail system integrated test bench of claim 1, wherein the oil supply system comprises: the cooling oil pump is connected with the oil tank;
a heating rod is arranged in the oil tank;
the input end of the cooling oil pump is connected with the lubricating oil transfer oil tank through a flowmeter and a thermometer of the measurement and control system, and the output end of the cooling oil pump is connected with the oil tank;
the input end of the oil supply oil pump is connected with the oil tank, and the output end of the oil supply oil pump is connected with a high-pressure oil pump to be tested through the basic rack system.
6. The high power high pressure common rail system integrated test stand of claim 5, wherein the oil supply system further comprises:
the oil tank cleaning hole is formed in the oil tank and is sealed through a detachably connected cover plate;
the oil pan is arranged at the bottom of the oil tank and used for collecting lubricating oil leaked from the oil tank, and a leakage detection sensor is arranged in the oil pan;
and a liquid level sensor and a temperature sensor are arranged in the oil tank.
7. The comprehensive test bed of the high-power high-pressure common rail system according to claim 1, wherein the measurement and control system adopts a positive displacement flowmeter, and data acquisition is performed through a PLC and is transmitted to an upper computer, so that monitoring, measurement and control of pressure, temperature and flow of the test bed are realized.
8. The high-power high-pressure common rail system comprehensive test bed according to claim 1, wherein the auxiliary system comprises: a refrigerating unit, an air compressor and a heat exchanger;
chilled water output by the refrigerating unit enters the heat exchanger through a pipeline to perform heat exchange on fuel oil and lubricating oil in the heat exchanger, compressed air output by the air compressor enters the main shaft of the gear box of the basic rack system through the pipeline and the filter, and an air seal is formed through air pressure to prevent the lubricating oil from permeating the main shaft.
9. The comprehensive test bed for a high-power high-pressure common rail system according to claim 1, further comprising: a security protection system;
the safety protection system is connected with the basic rack system, the fuel oil supply system and the lubricating oil supply system, monitors preset safety parameters, and gives an alarm and stops when the preset safety parameters exceed a preset range.
10. A high-pressure oil pump test method, which is characterized in that the high-pressure oil pump is tested by adopting the comprehensive test bed of the high-power high-pressure common rail system as claimed in any one of claims 1 to 9.
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| CN113898512A (en) * | 2021-11-11 | 2022-01-07 | 重庆红江机械有限责任公司 | Low-speed machine system test system |
| CN115126636A (en) * | 2022-07-12 | 2022-09-30 | 武汉东测科技有限责任公司 | Fuel oil system test bench |
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