RU2495394C1 - Ice turbo compressor test bench - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: test bench comprises feed and supply lines, controlled gas flow source with controlled drive, tested turbo compressor with cooling and lubing system, gas flow pulsation exciter and controlled throttle. Controlled drive is composed of ICE with jet mixer arranged between controlled throttle and discharge pipe. Test bench incorporates analog input module, switchboard, data processing unit, interface converter, data output device, memory, turbo compressor rotor and temporary compressor rpm transducers, gas flow pressure and temperature transducers. Pressure and temperature transducers are arranged at tested and temporary turbo compressor inlets and outlets, turbine of tested turbo compressor inlet and outlet and ICE outlet. Airflow rate transducers are arranged at compressor and ICE outlets. Note here that all transducers of pressure, temperature airflow rate and rpm are connected via analog input module and switchboard with data processing input connected with memory and via interface converter with data output unit.

EFFECT: higher validity of testing.

1 dwg

Description

The invention relates to measuring technique, and more particularly to testing of blade machines, in particular turbochargers for boosting internal combustion engines, and can be widely used in testing turbines and compressors in general and power engineering.

A known test bench for testing a turbocompressor of an internal combustion engine, comprising an input and output lines, an adjustable gas flow source and a device for generating pulsations of the gas stream, an input and output lines are connected respectively to a compressor and a turbine of the tested turbocompressor, and an adjustable gas stream source is connected to an input and output highways, as well as the stand contains an adjustable throttle with a control mechanism and a branch pipe, and an adjustable source of gas flow made in the form of a technological compressor with an adjustable drive, and an adjustable throttle is located in the output line at the outlet of the technological compressor, and the damper is placed in the outlet pipe, which is connected to the output line between the adjustable throttle and the turbine of the tested turbocharger (AS USSR No. 1239545, MKI G01M 15/00, published on 06/23/1986, authors D.Ya. Nosyrev, GP Denisov “Test bench for testing a turbocharger of an internal combustion engine”).

The disadvantage of this stand is the low reliability of the turbocharger test due to the impossibility of providing real conditions.

A known bench for testing a turbocharger of an internal combustion engine, comprising an input and output line, an adjustable gas flow source and a device for generating pulsations of the gas flow, an adjustable throttle with a control mechanism and a branch pipe, and an adjustable gas stream source is made in the form of a technological compressor with an adjustable drive, moreover, an adjustable throttle is located in the output line at the outlet of the process compressor, and the damper is located in the outlet pipe, to which is connected to the output line between the adjustable throttle and the turbine of the turbocharger under test, and also uses an internal combustion engine as the adjustable drive, it is equipped with a jet mixer installed between the adjustable throttle and the branch pipe, the active channel of the mixer connected to the output of the process compressor, and the passive channel with the exhaust manifold of an internal combustion engine (AS USSR No. 1511620 MKI: G01M 15/00, publ. 09/30/89, author D.Ya. Nosyrev “Stand for testing a turbocharger of an internal combustion engine”).

The disadvantage of this stand is the low reliability of the turbocharger test due to the lack of operational measurement, registration and processing of large data arrays of a multitude of controlled parameters.

This technical solution is selected as a prototype.

The technical result of the proposed stand is to increase the reliability of testing a turbocharger by measuring, recording and processing large data arrays of a variety of controlled parameters.

The technical result is achieved by the fact that in the test bench for a turbocharger of an internal combustion engine containing an input and output line, an adjustable gas flow source with an adjustable drive, made in the form of a process compressor, a tested turbocompressor, a device for creating gas flow pulsations and an adjustable throttle, as of an adjustable drive, an internal combustion engine with a jet mixer installed between an adjustable throttle and an outlet pipe is used ohm, a turbocharger lubrication and cooling system, an analog input module, a switch, an information processing unit, an interface converter, an information output device, a storage device, turbocharger rotor speed sensors and a process compressor are also installed, and air pressure sensors are installed at the input and output of the test compressor turbocharger, at the inlet and outlet of the process compressor, at the inlet and outlet of the turbine of the tested turbocharger, at the exit of the diesel engine, sensors temperatures are installed at the inlet and outlet of the compressor of the tested turbocompressor, at the inlet and outlet of the process compressor, at the inlet and outlet of the turbine of the tested turbocompressor, at the outlet of the diesel, air flow sensors are installed at the outlet of the compressor and at the outlet of the diesel, all pressure sensors, temperature, air flow and speed connected through an analog input module and a switch with an information processing unit that is connected to a storage device and through an interface converter and with an information output device.

The presence of these elements provides on-line measurement, registration of large data arrays of the set and processing of controlled parameters of the turbocompressor and the process compressor, with visualization of intermediate and resulting data, with the possibility of outputting the processing results to any output device (printing device, display, storage device, etc. .). It allows using the creation of databases and knowledge bases of unlimited volume to use the accumulated intellectual potential of developers, researchers, diagnosticians, and operators to conduct an objective examination of the technical condition of a turbocharger.

The drawing shows a schematic diagram of the proposed stand.

The stand contains a technological compressor 1 with an adjustable drive, made in the form of an internal combustion engine 2, an inlet pipe 3, a compressor 4 of a test turbocharger, an outlet pipe 5, a turbine 6 of a test turbocharger, an outlet pipe 7 of an output pipe, a rotary damper 8 with an actuator 9, an adjustable throttle 10 with a control mechanism 11, the jet mixer 12, the passive channel of the mixer 13, pipe 14, the exhaust manifold 15 of the internal combustion engine, the active channel of the mixer 16. On the stand is installed air pressure sensors at the inlet to the compressor of the tested turbocharger 17, at the outlet of the compressor of the tested turbocharger 18, at the inlet to the process compressor 19, at the outlet of the diesel 20, at the outlet of the process compressor 21, at the turbine inlet of the tested turbocharger 22, at the outlet of turbines of the test turbocharger 23; temperature sensors at the inlet to the compressor of the turbocharger under test 24, at the outlet of the compressor of the turbocharger under test 25, at the inlet to the process compressor 26, at the outlet of the diesel 27, at the outlet of the process compressor 28, at the turbine inlet of the test turbocharger 29, at the turbine exit test turbocharger 30; air flow sensors at the outlet of the diesel engine 31, at the outlet of the compressor of the turbocharger under test 32; speed sensors of a turbocharger 33, a process compressor 34, an analog input module 35, a switch 36, an information processing unit 37, a storage device 38, an interface converter 39 and an information output device 40.

The stand works as follows.

When starting up, the adjustable throttle 10 is fully opened, using the actuator 9, the shutter 8 is set to the closed position, and the branch pipe 7 is disconnected from the output line 5. The internal combustion engine 2 is started and heated at low speeds.

After warming up the engine 2, its revolutions are increased, and consequently, its revolutions of the process compressor 1. At the same time, air flows through the inlet pipe 3 through compressor 4 to the inlet of process compressor 1. In process compressor 1, air is compressed, resulting in air pressure and temperature The output of the compressor increases. Air with elevated pressure and temperature after leaving the process compressor 1 enters through an adjustable throttle 10 into the active channel 16 of the jet mixer 12. At the same time, the exhaust gases from the exhaust manifold 15 of the internal combustion engine 2 through the line 14 enters the passive channel 13 of the mixer 12. B the jet mixer 12, the air and exhaust gases are mixed and through the output line 5 enter the entrance to the turbine 6 of the turbocompressor, where they expand and complete the work. The turbocharger rotor comes into rotation. As the rotor speed of the turbocompressor increases, the engine speed of the internal combustion engine 2 is set so that the gas temperature at the outlet of the mixer 12 (at the inlet to the turbine 6) matches the specified test conditions. In this case, using the control mechanism 11, the adjustable throttle 10 is covered until the turbocharger rotor rotations specified in the test conditions are obtained. Then, using the control system of the internal combustion engine 2, which serves to drive the process compressor 1, the control mechanism 11 of the adjustable throttle 10 and the actuator 9 of the rotary damper 8 determine the cyclicity of the parameters changing at the turbine inlet 6 set by the test program.

The operation parameters of the tested turbocharger are measured using pressure sensors 17, 18, 22, 23, temperature sensors 24, 25, 29, 30 and the sensor 33 of the rotor speed of the turbocompressor. The operation parameters of the process compressor are measured by pressure sensors 19, 21, temperature sensors 26, 28, speed 34 and air flow 32. The diesel engine is equipped with pressure sensors 20 temperature 27 and air flow 31. Signals from the sensors are fed to the analog input module 35, where it is converted into a digital code. After that, the information flows through the switch 36 to the information processing unit 37, where the information is processed using special application programs. From the information processing unit 37, it can be supplied to the storage device 38 for storing data on the tests performed or to the interface converter 39. After that, the information is supplied to the output device 40 in any user-friendly form.

The proposed utility model of a test bench for turbochargers with an expert system provides on-line measurement, registration of a large data array and processing of many controlled parameters with visualization of intermediate and resulting data and with the possibility of outputting the processing results to any output device, which allows determining the margin of stability by surging, as a result of which reduce the number of unscheduled repairs by 12-25% and increase the efficiency of the turbocharger by 10-15%.

Claims (1)

A test bench for a turbocharger of an internal combustion engine, comprising an input and output line, an adjustable gas flow source with an adjustable drive, made in the form of a process compressor, a tested turbocompressor and a device for creating pulsations of a gas flow and an adjustable throttle, an internal combustion engine with a jet mixer installed between an adjustable throttle and a branch pipe, a lubrication and cooling system of a turbocomp sora, characterized in that the stand is additionally equipped with an analog input module, a switch, an information processing unit, an interface converter, an information output device, a storage device, turbocharger rotor speed sensors and a process compressor, seven air pressure sensors that are installed at the input and output tested turbocharger compressor, at the inlet and outlet of the process compressor, at the turbine inlet and outlet of the tested turbocharger, at the diesel outlet, sensors temperatures, which, in turn, are installed at the inlet and outlet of the compressor of the tested turbocompressor, at the inlet and outlet of the process compressor, at the inlet and outlet of the turbine of the tested turbocompressor, at the outlet of the diesel engine and air flow sensors that are installed at the outlet of the compressor and at exit from the diesel engine, and all the pressure, temperature, air flow and speed sensors are connected to the information processing unit via an analog input module and a switch, and the information processing unit is connected to device and through an interface converter with an information output device.

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