CN112378668A - Energy-saving type test device for medium-speed high-power diesel engine - Google Patents
Energy-saving type test device for medium-speed high-power diesel engine Download PDFInfo
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- CN112378668A CN112378668A CN202011265950.9A CN202011265950A CN112378668A CN 112378668 A CN112378668 A CN 112378668A CN 202011265950 A CN202011265950 A CN 202011265950A CN 112378668 A CN112378668 A CN 112378668A
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- diesel engine
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
- F02B63/042—Rotating electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B79/00—Running-in of internal-combustion engines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The utility model provides an energy-saving type testing machine device for medium-speed high-power diesel engine, the power output end at the motor is divided into two the tunnel and respectively with electric water heating device and the one end electric connection of switching-over power supply unit through wire I that installs switch K1 and switch K2, two connectors of the switching-over power supply unit other end respectively with commercial power electric wire netting and load electric connection, and realize the mode switch that commercial power electric wire netting supplies power for the load or motor supplies power for the load through adjusting switching-over power supply unit, the control unit is connected with the motor respectively through many control lines, electric water heating device, the load, the diesel engine, switching-over power supply unit, switch K1 and switch K2. The invention reduces the test cost for the diesel engine, fully recycles the electric energy under the performance test mode of the ignition operation working condition of the diesel engine, eliminates the extra electric energy consumption for driving the load of the diesel engine and domestic hot water, has obvious economic benefit, greatly shortens the test run period of the diesel engine, and obviously reduces the labor, equipment and fuel power cost.
Description
Technical Field
The invention belongs to the technical field of diesel engine tests, and particularly relates to an energy-saving test device for a medium-speed high-power diesel engine.
Background
At present, the test acceptance of the medium-speed diesel engine is generally carried out by adopting a method that the medium-speed diesel engine is connected with a hydraulic dynamometer, namely when the diesel engine works at different rotating speeds, the output power of the diesel engine is adjusted by the hydraulic dynamometer so as to test whether the working state of the diesel engine is normal or not and whether the working characteristics meet the requirements of the test outline or not. At present, the test of the medium-speed high-power diesel engine is generally divided into a running-in test and a factory acceptance test, and the test contents of two aspects are mainly completed in the running-in test stage: on one hand, checking whether the functions of systems such as fuel oil, lubricating oil, air, cooling, monitoring, security and the like of the diesel engine and all parts of the diesel engine are normal or not, and eliminating the problem of abnormal faults; on the other hand, running-in is carried out on each moving part of the diesel engine through actual operation, the working coordination and accuracy of each part are improved, and each parameter index is optimized and adjusted; and the factory acceptance test is mainly used for completing the comprehensive performance test of the diesel engine according to the formulated experiment outline requirements.
The middle-speed high-power diesel engine is a four-stroke diesel engine, whether the working condition of an auxiliary system or a diesel engine body reaches the standard or not needs to be checked after the diesel engine is started to operate, before a running-in test of the diesel engine, systems such as fuel oil, lubricating oil, cooling water, compressed air, smoke exhaust, electric control and the like of a diesel engine test bed need to be modified so as to meet the test requirements of the diesel engine, and whether each system works normally needs to be verified in a test stage; in addition, the medium-speed diesel engine system is complex, the number of components is extremely large, the working performance of the diesel engine can be directly influenced no matter the processing technology and the quality of the components or the assembly, installation and debugging technology of the components or the whole engine, and whether the diesel engine system works normally or not needs to be verified in a test stage.
Because the diesel engine is in a compression ignition type working mode, in the conventional test process, when the diesel engine normally supplies oil, oil is injected and combusted in a cylinder, and after the diesel engine normally operates, great noise and vibration can be generated in the operation and power application processes, so that faults are not easy to perceive and discover, and the regular check of the diesel engine is not facilitated; for the abnormal phenomena found, the fault elimination is not facilitated due to the existence of noise and vibration; in addition, in the test process of the diesel engine, the actual operation time of the diesel engine is far longer than the theoretical test time, and the actual operation time of the diesel engine under each working condition above 50% rated power exceeds half of the total test time no matter in the running-in test or the factory test process, so that the fuel power cost in the test process of the diesel engine is very high, the work output by the diesel engine in the test process is converted into the internal energy of the working water of the hydraulic dynamometer and is emitted to the environment, and the energy is not effectively recycled, so that the improvement is needed in conclusion.
Disclosure of Invention
The technical problems solved by the invention are as follows: the energy-saving type test run device for the medium-speed high-power diesel engine is characterized in that a control unit controls an asynchronous generator, an electric water heating device, a load, a diesel engine, K1, a switch K2 and a reversing power supply unit, so that conversion between a diesel engine running-in fault diagnosis and troubleshooting test mode of the asynchronous generator in a motor mode and a diesel engine ignition running working condition performance test mode of the asynchronous generator in a generator mode is realized, the test cost of the running-in fault diagnosis and troubleshooting test is reduced, electric energy in the diesel engine ignition running working condition performance test mode is completely recycled, extra electric energy consumption for driving the diesel engine load and domestic hot water is eliminated, the economic benefit is obvious, the test run period of the diesel engine is greatly shortened, the cost of labor, equipment and fuel power is obviously reduced, and the use value is high.
The technical scheme adopted by the invention is as follows: the energy-saving type test device for the medium-speed high-power diesel engine comprises an asynchronous generator, an electric water heating device, a load, a control unit and a reversing power supply unit, wherein a connecting shaft of the asynchronous generator is fixedly connected with a connecting shaft of the diesel engine, a power output end of the asynchronous generator is divided into two paths through a lead I provided with a switch K1 and a switch K2 and is electrically connected with one ends of the electric water heating device and one end of the reversing power supply unit respectively, the switch K1 and the switch K2 are used for controlling the on-off of the electric water heating device and the reversing power supply unit and the power output end of the asynchronous generator respectively, two connectors at the other end of the reversing power supply unit are electrically connected with a mains supply power grid and the load respectively, the mode switching of the mains supply power grid for the load or the asynchronous generator for the load is realized by adjusting the, The electric water heating device, the load, the diesel engine, the reversing power supply unit, the switch K1 and the switch K2 are connected.
Wherein, the switching-over power supply unit includes rectification inverter, the branch circuit end connection who installs switch K1 on rectification inverter one end and the wire I, the rectification inverter other end divide into two the tunnel through wire II and is connected with commercial power electric wire netting and load respectively, install switch K3 on the main way of wire II and install switch K5 and switch K4 that are used for controlling commercial power electric wire netting and load break-make respectively on two branches respectively, commercial power electric wire netting and load are connected through wire III who installs switch K6, the switching-over power supply unit is connected with rectification inverter, switch K3, switch K5, switch K4 and switch K6 respectively through many control lines.
Furthermore, the rectification inverter device adopts an active front-end frequency converter.
Furthermore, the connecting shaft of the asynchronous generator is fixedly connected with the connecting shaft of the diesel engine through a high-elasticity coupler.
Compared with the prior art, the invention has the advantages that:
1. according to the technical scheme, based on two working states of the asynchronous generator, the electric water heating device, the load, the diesel engine, the K1, the switch K2 and the reversing power supply unit are controlled by the control unit, so that the conversion between a diesel engine running-in fault diagnosis and troubleshooting test mode of the asynchronous generator in a motor mode and a diesel engine ignition working condition performance test mode of the asynchronous generator in a generator mode is realized, the detection of different films and tests of the diesel engine and delivery tests is finished, and the requirement of a diesel engine test-run outline on diesel engine test is met;
2. according to the technical scheme, after the asynchronous generator is used for driving the diesel engine to operate, running-in and fault diagnosis of the diesel engine are realized, vibration and noise in the whole process are low, judgment of fault points of working parts in the diesel engine and monitoring of operation conditions are facilitated, and test cost of running-in fault diagnosis and troubleshooting test is reduced;
3. in the technical scheme, under the diesel engine ignition operation working condition performance test mode, the generated electric energy is completely recycled after the asynchronous generator driven by the diesel engine generates electricity and is used for driving a diesel engine load and a domestic hot water heater device, so that the extra electric energy consumption of the diesel engine load and the domestic hot water is reduced, and the economic benefit is obvious;
4. the technical scheme has the advantages of simple structure, low design cost, greatly shortened test run period of the diesel engine, obviously reduced labor, equipment and fuel power cost and higher use value.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
In the following, an embodiment of the present invention is described with reference to fig. 1, so as to clearly and completely describe the technical solution, it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The energy-saving type test device for the medium-speed high-power diesel engine comprises an asynchronous generator 4, an electric water heating device 2, a load 8, a control unit 6 and a reversing power supply unit 10, wherein a connecting shaft of the asynchronous generator 4 is fixedly connected with a connecting shaft of the diesel engine 3, and specifically, the connecting shaft of the asynchronous generator 4 is fixedly connected with the connecting shaft of the diesel engine 3 through a high-elasticity coupler 5; the power output end of the asynchronous generator 4 is divided into two paths through a lead I9 provided with a switch K1 and a switch K2 and is respectively and electrically connected with one ends of the electric water heating device 2 and the reversing power supply unit 10, the switch K1 and the switch K2 are used for respectively controlling the on-off between the electric water heating device 2 and the reversing power supply unit 10 and the power output end of the asynchronous generator 4, two connectors at the other end of the reversing power supply unit 10 are respectively and electrically connected with a mains supply power grid 7 and a load 8, the mode switching of the mains supply power grid 7 for supplying power to the load 8 or the mode switching of the asynchronous generator 4 for supplying power to the load 8 is realized by adjusting the reversing power supply unit 10, and the control unit 6 is respectively connected with the asynchronous generator 4, the electric water heating device 2, the load 8, the diesel engine 3, the reversing power supply unit 10;
in the technical scheme, the control unit 6 is used for controlling the asynchronous generator 4, the electric water heating device 2, the load 8, the diesel engines 3, K1, the switch K2 and the reversing power supply unit 10 based on two working states of the asynchronous generator 4, so that the conversion between a running-in fault diagnosis and troubleshooting test mode of the diesel engine 3 of the asynchronous generator 4 in a motor mode and a fire running working condition performance test mode of the diesel engine 3 of the asynchronous generator 4 in a generator mode is realized, the detection of different membranes and tests and delivery tests of the diesel engine 3 is finished, and the requirement of a diesel engine test-run outline on the test run of the diesel engine 3 is met;
the specific structure of the commutation power supply unit 10 is as follows: the reversing power supply unit 10 comprises a rectifying and inverting device 1, one end of the rectifying and inverting device 1 is connected with a shunt end part of a lead I9 on which a switch K1 is installed, the other end of the rectifying and inverting device 1 is divided into two paths through a lead II 11 and is respectively connected with a commercial power grid 7 and a load 8, a main path of the lead II 11 is provided with a switch K3, two branch paths are respectively provided with a switch K5 and a switch K4 for respectively controlling the on-off of the commercial power grid 7 and the load 8, the commercial power grid 7 and the load 8 are connected through a lead III 12 on which a switch K6 is installed, and the reversing power supply unit 10 is respectively connected with the rectifying and inverting device 1, the switch K3, the switch K5, the switch K4 and the switch K6 through; specifically, the rectification inverter 1 adopts an active front-end frequency converter.
The energy-saving type test method for the medium-speed high-power diesel engine specifically comprises two modes:
1) diesel engine 4 running-in and fault diagnosis and elimination test mode
Firstly, the control unit 6 closes the K6, disconnects the K2 and the K4, supplies power to the load 8 by the commercial power grid 7, then closes the switches K1, K3 and K5, controls the electrical frequency output by the rectification inverter 1 by the control unit 6, controls the rotating speed of the asynchronous generator 4 (at the moment, the asynchronous generator 4 works in a motor mode), further controls the rotating speed of the diesel engine 3 to stably work at a set rotating speed, and can accurately control the rotating speed of the diesel engine 3 through the rectification inverter 1 in the process, so that the running conditions of auxiliary equipment such as a fuel pump, a cooling water pump, a lubricating oil pump and a high-pressure oil pump which are arranged on the diesel engine 3 at different rotating speeds can be conveniently checked, and whether the functions of the auxiliary equipment are normal or not is; judging whether a piston connecting rod assembly, a camshaft assembly, a crankshaft assembly and the like in the diesel engine 3 work normally or not, and searching for a fault point; the working performance of the working parts of the diesel engine 3 after overhauling is checked;
2) diesel engine ignition operation condition performance test mode
After the control unit 6 controls each part to return to the initial state, K6 is firstly closed, the electric supply network 7 supplies power to the load 8, then the diesel engine 3 is started, so that the diesel engine 3 starts oil injection and ignition, the rotation speed of the diesel engine 3 is controlled to be stabilized on the set rotation speed by the control system of the diesel engine 3, then the switch K2 is closed, the control unit 6 adjusts the power of the electric water heating device 2, and the purpose of controlling the external output power of the diesel engine 3 is achieved; when the power set by the diesel engine 3 is higher than the total power of the load 8, the control unit 6 controls the closing of the switches K1 and K3, when the whole system is stable without faults, the control unit 6 controls the switch K4 to be closed, the control unit 6 controls the load 8 to be transferred from the utility power grid 7 to the power grid of the diesel engine 3 driven asynchronous generator 4, after the transfer of the load 8 is completed (namely when the power born by the K6 is less than 10% of the rated power of the load 8, the load 8 is transferred completely), the utility power connection switch K6 is disconnected, at the moment, the adjustment of the power of the load 8 is adjusted by the control unit 6, the adjustment is mainly realized by adjusting the power of the electric water heating device 2, when the diesel engine 3 stops due to faults, the control unit 6 controls the switch K6, connected with the utility power grid 7, to be quickly closed, and the switch K4 is disconnected.
According to the technical scheme, after the asynchronous generator 4 is used for driving the diesel engine 3 to operate, running-in and fault diagnosis of the diesel engine 3 are realized, vibration and noise in the whole process are low, judgment of fault points of working parts in the diesel engine 3 and monitoring of operation conditions are facilitated, and test cost of running-in fault diagnosis and troubleshooting test is reduced; under the ignition operation working condition performance test mode of the diesel engine 3, the generated electric energy is completely recycled after the asynchronous generator 4 for driving the diesel engine 3 generates electricity and is used for driving the diesel engine load 8 of the diesel engine 3 and the water heater device 2 of the domestic hot water to use, so that the extra electric energy consumption of the diesel engine load 3 and the domestic hot water is reduced, and the economic benefit is obvious; the structure is simple, the design cost is low, the test run period of the diesel engine 3 is greatly shortened, the labor cost, the equipment cost and the fuel power cost are obviously reduced, and the use value is high.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and therefore, all equivalent changes made by the contents of the claims of the present invention should be included in the claims of the present invention.
Claims (4)
1. Energy-saving machine testing device for medium-speed high-power diesel engine, its characterized in that: including asynchronous generator (4), electric hot water device (2), load (8), control unit (6) and switching-over power supply unit (10), the connecting axle of asynchronous generator (4) and the connecting axle fixed connection of diesel engine (3), the power output end of asynchronous generator (4) divide into two the tunnel and respectively with electric hot water device (2) and the one end electric connection of switching-over power supply unit (10) through wire I (9) of installing switch K1 and switch K2, switch K1 and switch K2 are used for controlling the break-make between electric hot water device (2) and switching-over power supply unit (10) and asynchronous generator (4) power output end respectively, two of switching-over power supply unit (10) other end respectively with commercial power electric wire netting (7) and load (8) electric connection to realize the power supply of commercial power electric wire netting (7) for load (8) or mode connector that asynchronous generator (4) supplies power for load (8) through adjustment switching-over power supply unit (10) And switching, wherein the control unit (6) is respectively connected with the asynchronous generator (4), the electric water heating device (2), the load (8), the diesel engine (3), the reversing power supply unit (10), the switch K1 and the switch K2 through a plurality of control lines.
2. The energy-saving type test run device for the medium-speed high-power diesel engine according to claim 1, characterized in that: commutation power supply unit (10) are including rectification inverter (1), install switch K1's branch end connection on rectification inverter (1) one end and wire I (9), rectification inverter (1) other end is divided into two the tunnel through wire II (11) and is connected with commercial power electric wire netting (7) and load (8) respectively, install switch K3 on the main road of wire II (11) and install respectively on two branches and be used for controlling switch K5 and switch K4 of commercial power electric wire netting (7) and load (8) break-make respectively, commercial power electric wire netting (7) and load (8) are connected through wire III (12) of installing switch K6, commutation power supply unit (10) are connected with rectification inverter (1), switch K3, switch K5, switch K4 and switch K6 respectively through many control lines.
3. The energy-saving type test run device for the medium-speed high-power diesel engine according to claim 2, characterized in that: the rectification inverter (1) adopts an active front-end frequency converter.
4. The energy-saving type test device for the medium-speed high-power diesel engine according to claim 1, 2 or 3, characterized in that: and the connecting shaft of the asynchronous generator (4) is fixedly connected with the connecting shaft of the diesel engine (3) through a high-elasticity coupler (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011265950.9A CN112378668B (en) | 2020-11-13 | 2020-11-13 | Energy-saving type test device for medium-speed high-power diesel engine |
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| CN202011265950.9A CN112378668B (en) | 2020-11-13 | 2020-11-13 | Energy-saving type test device for medium-speed high-power diesel engine |
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| CN112378668A true CN112378668A (en) | 2021-02-19 |
| CN112378668B CN112378668B (en) | 2023-02-03 |
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