CN108827641B - High back pressure diesel engine bench test analogue means - Google Patents
High back pressure diesel engine bench test analogue means Download PDFInfo
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- CN108827641B CN108827641B CN201810611097.8A CN201810611097A CN108827641B CN 108827641 B CN108827641 B CN 108827641B CN 201810611097 A CN201810611097 A CN 201810611097A CN 108827641 B CN108827641 B CN 108827641B
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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
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
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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
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Abstract
The invention belongs to the technical field of diesel engine tests, and provides a high back pressure diesel engine bench test simulation device which is provided with an air inlet system corresponding to the diesel engine; the air inlet system is provided with a double-torsion-wire flowmeter arranged at the inlet of the pipeline, and the outlet of the double-torsion-wire flowmeter is communicated with the filter; an outlet of the filter is connected with an air duct type heater; the air duct type heater is communicated with a sea water pump, and the sea water pump is respectively communicated with the diesel engine, the muffler and the generator through a water diversion pipeline; the exhaust system is provided with an electric back pressure valve I and a high-temperature electric back pressure valve II which are connected to an exhaust pipeline of the diesel engine; the high-temperature electric back pressure valve I and the high-temperature electric back pressure valve II are communicated with the water tank through an exhaust outer tongue valve; and a water collecting tank is arranged on the exhaust pipeline between the exhaust outer tongue valve and the high-temperature electric back pressure valve II. The invention realizes the more comprehensive and more complete simulation test of the high-backpressure diesel engine.
Description
Technical Field
The invention belongs to the technical field of diesel engine tests, in particular relates to a bench test simulation device for a high-back pressure diesel engine, and particularly relates to a bench test device for air intake, air exhaust, cooling and overall performance of a diesel engine in a high-back pressure environment.
Background
When the diesel engine is used in a high back pressure (absolute pressure is 110kPa-120 kPa) environment, a diesel-electric main power device mode, namely a diesel generator set power supply and grid-connected operation mode is adopted. The environmental parameters of the diesel engine such as air inlet temperature, air inlet pressure, air inlet flow, exhaust noise, muffler cooling, exhaust back pressure and back pressure fluctuation are obviously different from those of the diesel engine in the bench test; therefore, in the bench test of the high-back pressure diesel engine, in order to accurately obtain the performance parameters of the diesel engine in the high-back pressure environment, a targeted test device is required to be built according to the environmental condition characteristics of the high-back pressure diesel engine; at present, bench test devices for high-back pressure diesel engines exist at home and abroad, high-back pressure environment simulation is realized to a certain extent, and the following problems still exist: the air inflow test, the muffler cooling water adjustment and test, and the free switching of the minimum non-backflow water allowing use of the rotation speed test, the performance test and the exhaust noise test cannot be realized in the same device.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a high back pressure diesel engine bench test simulation device.
The invention adopts the following technical scheme for realizing the purposes of the invention:
the test simulation device is provided with an air inlet system corresponding to the diesel engine; the air inlet system is provided with a double-torsion-wire flowmeter arranged at the inlet of the pipeline, and the outlet of the double-torsion-wire flowmeter is communicated with a filter arranged in the pipeline; the inlet and the outlet of the double-torsion-wire flowmeter are respectively provided with a pressure gauge IX and a pressure gauge X, the air pressure values before and after the double-torsion-wire flowmeter and before the double-torsion-wire flowmeter enters a filter are measured through the pressure gauge IX and the pressure gauge X, and the air inlet flow is calculated by combining the environmental temperature parameters between experiments; the filter outlet is provided with a pressure gauge XI; the pressure gauges X and XI arranged in front of and behind the filter compare the air pressure difference before and after entering the filter, and the filter blockage condition is judged; the outlet of the filter is connected with an air duct type heater for heating air entering the diesel engine, and the air duct type heater controls the air inlet temperature through an internal heating element; the air duct type heater sends air into the diesel engine through a vacuum degree regulating valve, a pressure stabilizing tank and a supercharger; a thermometer VII is arranged on an air inlet pipe at a position 0.5m away from the inlet of the supercharger, and the heating power of the air duct type heater is adjusted according to the air temperature measured by the thermometer VII to form closed-loop control of heating adjustment of the air inlet temperature; a pressure gauge XII for detecting the air inlet pressure in the air inlet pipe is arranged on the air inlet pipe at a position 1m away from the inlet of the supercharger; according to the intake vacuum degree value measured by the pressure gauge XII, adjusting the opening degree of an intake vacuum degree regulating valve;
the test simulation device is also provided with a cooling system, and the cooling system is provided with a seawater tank for supplementing water to the diesel engine and the motor; the seawater tank is communicated with the water supplementing pipeline through a water supplementing valve; the seawater tank is communicated with a water return pipeline through a drainage valve; the seawater tank also provides cooling water for the diesel engine and the engine through a seawater pump; one end of the seawater pump is communicated with the seawater tank, and the other end of the seawater pump is respectively communicated with the diesel engine, the muffler and the generator through a water diversion pipeline; a control valve I and a seawater flowmeter I are arranged between the diesel engine and the water diversion pipeline, and a thermometer I and a pressure meter I for measuring the temperature and the pressure of the seawater entering the diesel engine are arranged between the seawater flowmeter I and the diesel engine; the outlet of the diesel engine is communicated with the muffler through a thermometer II and a pressure meter II which are used for measuring the temperature and the pressure of the seawater at the outlet of the diesel engine; a control valve II and a seawater flowmeter II are arranged between the muffler and the water diversion pipeline, and a thermometer III and a pressure meter III for measuring the temperature and the pressure of the seawater entering the muffler are arranged between the seawater flowmeter II and the muffler; the water diversion pipeline is communicated with the generator through a control valve III and a seawater flowmeter III, and a thermometer IV and a pressure gauge IV for measuring the temperature and the pressure of the seawater entering the generator are arranged between the generator and the seawater flowmeter III; the seawater outlet end of the generator is communicated with the muffler through a pressure gauge V and a temperature gauge V; the seawater outlet end of the muffler is communicated with the seawater tank through a control valve IV; a thermometer VI and a pressure meter VI for measuring the temperature and the pressure of the seawater at the outlet end of the muffler are arranged between the muffler and the control valve IV, the opening of the control valve IV is adjusted to control the temperature and the pressure of the seawater outlet, and the seawater passing through the control valve IV enters a seawater tank through a water return pipeline of the tank;
the exhaust after being cooled and muffled by the muffler is divided into two paths; one path is discharged through an exhaust noise measuring pipeline, and an exhaust noise sensor is used for carrying out exhaust noise test at an outlet according to standard requirements; a first thermometer for measuring the exhaust temperature of the muffler outlet of the exhaust noise pipeline is arranged at the muffler outlet position; the other path is an exhaust system of the test simulation device; the exhaust system is provided with a high-temperature electric back pressure valve I which is connected to an exhaust pipeline of the diesel engine and is used for performing cold start and hot start tests under the condition of high back pressure of the high back pressure diesel engine, and a high-temperature electric back pressure valve II which is used for performing high back pressure of the high back pressure diesel engine, and performing high back pressure ballast water blowing tests, continuous operation, back pressure fluctuation, high vacuum and high back pressure short-time operation test performance tests; the high-temperature electric back pressure valve II is communicated with a water tank for performing a low-back flow water-free allowable rotation speed test of the high-back pressure diesel engine through an exhaust external tongue valve, and the water tank is arranged at the tail end of an exhaust pipeline; the water tank is provided with a liquid level meter for measuring the liquid level of the water tank, and the liquid level in the water tank in a rotation speed test which is allowed to be used by the lowest non-backflow water is recorded to be high; the inlet end of the exhaust outer tongue valve is provided with a first pressure gauge for measuring the exhaust pressure at the front end of the exhaust outer tongue valve, and the exhaust outer tongue valve is opened when the back pressure of the exhaust outer tongue valve reaches a certain specific value; a water collecting tank for performing drainage treatment after the exhaust outer tongue valve fails and preventing seawater from flowing backwards is arranged on the exhaust pipeline between the exhaust outer tongue valve and the high-temperature electric back pressure valve II; the outer wall of the water collection tank is provided with a water jacket for cooling exhaust gas; two parallel arrangement's drainage pipe are installed to the lower extreme of header tank: a drainage pipeline I and a drainage pipeline II; the electromagnetic valve I and the electromagnetic valve II are respectively arranged on the drainage pipeline I and the drainage pipeline II; the drainage pipeline I is also provided with a liquid level sensor I and a liquid level sensor II; the liquid level sensor I and the liquid level sensor II are arranged up and down; a liquid level sensor III is also arranged in the middle of the inner wall of the water collection tank; the tail ends of the drainage pipeline I and the drainage pipeline II are communicated through a sewage draining box; in the running process of the high back pressure diesel engine, the exhaust outer tongue valve fails, seawater enters the water collecting tank along the exhaust pipeline, then enters the water discharging pipeline I and the water discharging pipeline II at first, when the water quantity is small, the seawater floods the liquid level sensor II, when the liquid level sensor I is not flooded, the electromagnetic valve I is opened, and if the water quantity of the water is large, when the seawater floods the liquid level sensor II and the liquid level sensor III, the electromagnetic valve I and the electromagnetic valve II are all opened, and the seawater in the pipe section is discharged to the sewage draining tank; if the seawater enters quickly, when the water level continuously rises to submerge the liquid level sensor III, the high-temperature electric back pressure valve II is forcibly closed, and the high-back pressure diesel engine is prompted to stop through the indicator lamp; the exhaust outer tongue valve can be used for exhausting after being opened, and can be closed in time to prevent the seawater from flowing backwards; the first pressure gauge is arranged on the front exhaust pipe of the exhaust outer tongue valve to measure the exhaust pressure at the front end of the exhaust outer tongue valve, when the exhaust pressure is larger than a specified value, the exhaust outer tongue valve is opened to exhaust, and when the exhaust pressure is smaller than the specified value, the exhaust outer tongue valve is closed to prevent the reverse flow of seawater.
The tail end of the exhaust pipeline is provided with an exhaust nozzle, and the exhaust nozzle is positioned in the water tank; the exhaust nozzle is in a frustum shape with a large lower part and a small upper part, and the exhaust flow speed is increased and the minimum non-backflow rotating speed is reduced by reducing the diameter of the exhaust pipe.
A thermometer VII and a pressure gauge VII for measuring the temperature and the pressure of the seawater entering the seawater pump are arranged between the seawater tank and the seawater pump.
A thermometer VIII and a pressure gauge VIII for measuring the temperature and the pressure of the seawater entering the water diversion pipeline are arranged between the seawater pump and the water diversion pipeline.
The high back pressure diesel engine bench test simulation device provided by the invention adopts the ending scheme, so that not only are the air intake vacuum degree adjustment, the exhaust back pressure control, the exhaust back pressure fluctuation control, the air intake temperature adjustment and the cooling water temperature adjustment realized, but also the air intake flow test, the exhaust noise test, the adjustment and the test of the muffler, the cooling water temperature and the cooling water pressure of the diesel engine and the generator, the minimum non-backflow water allowable rotation speed test, the free switching of a performance test and an exhaust noise test exhaust pipeline are realized, and the more comprehensive and more complete high back pressure diesel engine simulation test is realized through the invention.
Drawings
FIG. 1 is a schematic diagram of an air intake system in accordance with the present invention.
FIG. 2 is a schematic illustration of an exhaust system according to the present invention.
Fig. 3 is a schematic diagram of a cooling system of the present invention.
In the figure: 1. the double-torsion flow meter, 2, a filter, 3, an air duct type heater, 4, an intake vacuum degree regulating valve, 5, a surge tank, 8, a muffler, 9, pressure gauges IX, 10, pressure gauges X, 11, pressure gauges XI, 12, pressure gauges XII, 13, temperature gauges VII, 14, a booster, 18, an exhaust noise measuring pipeline, 19, a high-temperature electric back pressure valve I, 20, a high-temperature electric back pressure valve II, 21, a water collecting tank, 22, a liquid level sensor I, 23, a liquid level sensor II, 24, an electromagnetic valve I, 25, an electromagnetic valve II, 26, a liquid level sensor III, 27, an exhaust external tongue valve, 28, an exhaust nozzle, 29, a water tank, 30, a liquid level gauge, 31, a first temperature gauge, 32, a second temperature gauge, 33, a second pressure gauge, 34, a first pressure gauge, 35 and a blow-down tank, 36, water diversion pipeline, 37, control valve i, 38, control valve ii, 39, control valve iii, 40, sea water flowmeter i, 41, sea water flowmeter ii, 42, sea water flowmeter iii, 43, diesel engine, 44, generator, 45, sea water tank, 46, pressure gauge vii, 47, temperature gauge vii, 48, pressure gauge viii, 49, temperature gauge viii, 50, pressure gauge i, 51, temperature gauge i, 52, pressure gauge iii, 53, temperature gauge iii, 54, pressure gauge iv, 55, temperature gauge iv, 56, pressure gauge ii, 57, temperature gauge ii, 58, pressure gauge v, 59, temperature gauge v, 60, temperature gauge vi, 61, pressure gauge vi, 62, water supplementing valve, 63, water draining valve, 64, control valve iv, 65, sea water pump, 66, water draining pipeline i, 67, water draining pipeline ii.
Detailed Description
The following detailed description of the invention is given with reference to the accompanying drawings, and is made by those skilled in the art to which the invention pertains.
The test simulation device is provided with an air inlet system corresponding to the diesel engine; as shown in fig. 1, the air inlet system is provided with a double-torsion-wire flowmeter 1 arranged at the inlet of a pipeline, and the outlet of the double-torsion-wire flowmeter 1 is communicated with a filter 2 arranged in the pipeline; the inlet and the outlet of the double-torsion-wire flowmeter 1 are respectively provided with a pressure gauge IX 9 and a pressure gauge X10, the air pressure values before and after the double-torsion-wire flowmeter and before the double-torsion-wire flowmeter enters a filter are measured through the pressure gauge IX 9 and the pressure gauge X10, and the air inlet flow is calculated by combining the environmental temperature parameters between experiments; the outlet of the filter 2 is provided with a pressure gauge XI 11; the pressure gauges X10 and XI 11 arranged in front of and behind the filter compare the air pressure difference before and after entering the filter, and the filter blockage condition is judged; the outlet of the filter 2 is connected with an air duct type heater 3 for heating air entering the diesel engine, and the air duct type heater 3 controls the air inlet temperature through an internal heating element; the air duct type heater 3 sends air into the diesel engine through a vacuum degree regulating valve 4, a surge tank 5 and a supercharger 14; in consideration of heat dissipation of an air inlet pipeline, a thermometer VII 13 is arranged on an air inlet pipe at a position 0.5m away from an inlet of the supercharger 14, and the heating power of the air duct type heater is adjusted according to the air temperature measured by the thermometer VII 13 to form closed loop control of heating adjustment of the air inlet temperature; a pressure gauge XII 12 for detecting the intake pressure in the intake pipe is installed on the intake pipe at a position 1m from the supercharger inlet in consideration of the variation of the intake pressure in the intake pipe; according to the intake vacuum degree value measured by the pressure gauge XII, adjusting the opening degree of an intake vacuum degree regulating valve; the volume of the surge tank 5 is processed based on the result of the calculation of the displacement of the high back pressure diesel engine 43 to attenuate or eliminate intake fluctuations due to piping structure, equipment, and stabilize the intake pressure.
As shown in fig. 3, the test simulation device also has a cooling system, and the cooling system has a seawater tank 45 for supplementing water to the diesel engine and the motor; the sea chest 65 is communicated with a water supplementing pipeline through a water supplementing valve 15; the seawater tank 45 is communicated with a water return pipeline through a water discharge valve 14; the sea chest also provides cooling water for the diesel engine 43 and the engine 44 through a sea water pump 65; one end of the seawater pump 65 is communicated with the seawater tank 45, and the other end is respectively communicated with the diesel engine 43, the muffler 8 and the generator 44 through the water dividing pipeline 36; a control valve I37 and a seawater flowmeter I40 are arranged between the diesel engine 43 and the water diversion pipeline 36, and a thermometer I50 and a pressure meter I51 for measuring the temperature and the pressure of the seawater entering the diesel engine are arranged between the seawater flowmeter I37 and the diesel engine; the outlet of the diesel engine 45 is communicated with the muffler 8 through a thermometer II 56 and a pressure meter II 57 for measuring the temperature and the pressure of the seawater at the outlet of the diesel engine; a control valve II 38 and a seawater flowmeter II 41 are arranged between the muffler 8 and the water diversion pipeline 36, and a thermometer III 52 and a manometer III 53 for measuring the temperature and the pressure of the seawater entering the muffler are arranged between the seawater flowmeter II 38 and the muffler 8; the water diversion pipeline is communicated with the generator 44 through a control valve III 39 and a seawater flowmeter III 42, and a thermometer IV 54 and a pressure meter IV 55 for measuring the temperature and the pressure of the seawater entering the generator are arranged between the generator 44 and the seawater flowmeter III 42; the seawater outlet end of the generator is communicated with the muffler 8 through a pressure gauge V58 and a temperature gauge V59; the seawater outlet end of the muffler 8 is communicated with the seawater tank 45 through a control valve IV 64; a thermometer VI 60 and a pressure meter VI 64 for measuring the temperature and the pressure of the seawater at the outlet end of the silencer are arranged between the silencer 8 and the control valve IV 45, the opening of the control valve IV is adjusted to control the temperature and the pressure of the seawater outlet, and the seawater passing through the control valve IV enters the seawater tank through a water return pipeline of the tank;
referring to fig. 2, the exhaust gas after being cooled and muffled by the muffler is divided into two paths; one path is discharged through an exhaust noise measuring pipeline 18, and an exhaust noise sensor is used for carrying out exhaust noise test at an outlet according to standard requirements; the exhaust noise measurement circuit 18 of this embodiment is of the prior art and will not be described in detail herein; a first thermometer 31 for measuring the exhaust temperature of the muffler outlet of the exhaust noise pipeline is arranged at the muffler outlet position; the other path is an exhaust system of the test simulation device; the exhaust system is provided with a high-temperature electric back pressure valve I19 which is connected to an exhaust pipeline of the diesel engine and is used for performing cold start and hot start tests under the condition of high back pressure of the high back pressure diesel engine, and a high-temperature electric back pressure valve II 20 which is used for performing high back pressure blowing ballast water tests, continuous operation, back pressure fluctuation, high vacuum degree and high back pressure short-time operation test performance tests of the high back pressure diesel engine; the high-temperature electric back pressure valve I19 and the high-temperature electric back pressure valve II 20 are communicated with a water tank 29 for carrying out a low-back flow water-free rotation speed test of the high-back pressure diesel engine through an exhaust external tongue valve 27, and the water tank 29 is arranged at the tail end of an exhaust pipeline; the water tank 29 is provided with a liquid level meter 31 for measuring the liquid level of the water tank, and the liquid level in the water tank in a rotation speed test is recorded to be high when the lowest non-backflow water is allowed to be used; the inlet end of the exhaust outer tongue valve 27 is provided with a first pressure gauge 34 for measuring the exhaust pressure at the front end of the exhaust outer tongue valve, and the exhaust outer tongue valve is opened when the back pressure of the exhaust outer tongue valve reaches a certain value; a water collection tank 21 for carrying out drainage treatment and preventing seawater backflow after the failure of the exhaust outer tongue valve is arranged on an exhaust pipeline between the exhaust outer tongue valve 34 and the high-temperature electric back pressure valve II 20; the outer wall of the water collection tank 21 is provided with a water jacket for cooling exhaust gas; two parallel arrangement's drainage pipe are installed to the lower extreme of header tank 21: drainage pipeline I66 and drainage pipeline II 67; the electromagnetic valve I24 and the electromagnetic valve II 25 are respectively arranged on the drainage pipeline I66 and the drainage pipeline II 67; the drainage pipeline I66 is also provided with a liquid level sensor I22 and a liquid level sensor II 23; the liquid level sensor I22 and the liquid level sensor II 23 are arranged up and down; the middle part of the inner wall of the water collection tank is also provided with a liquid level sensor III 26; the tail ends of the drainage pipeline I66 and the drainage pipeline II 27 are communicated through a sewage draining box 35; in the running process of the high back pressure diesel engine, the exhaust outer tongue valve fails, seawater enters the water collecting tank along the exhaust pipeline, then enters the water discharging pipeline I and the water discharging pipeline II at first, when the water quantity is small, the seawater floods the liquid level sensor II, when the liquid level sensor I is not flooded, the electromagnetic valve I is opened, and if the water quantity of the water is large, when the seawater floods the liquid level sensor II and the liquid level sensor III, the electromagnetic valve I and the electromagnetic valve II are all opened, and the seawater in the pipe section is discharged to the sewage draining tank; if the seawater enters quickly, when the water level continuously rises to submerge the liquid level sensor III, the high-temperature electric back pressure valve II is forcibly closed, and the high-back pressure diesel engine is prompted to stop through the indicator lamp; the exhaust outer tongue valve can be used for exhausting after being opened, and can be closed in time to prevent the seawater from flowing backwards; the first pressure gauge is arranged on the front exhaust pipe of the exhaust outer tongue valve to measure the exhaust pressure at the front end of the exhaust outer tongue valve, when the exhaust pressure is larger than a specified value, the exhaust outer tongue valve is opened to exhaust, and when the exhaust pressure is smaller than the specified value, the exhaust outer tongue valve is closed to prevent the reverse flow of seawater.
The tail end of the exhaust pipeline is provided with an exhaust nozzle 28, and the exhaust nozzle is positioned in the water tank; the exhaust nozzle is in a frustum shape with a large lower part and a small upper part, and the exhaust flow speed is increased and the minimum non-backflow rotating speed is reduced by reducing the diameter of the exhaust pipe.
A thermometer VII 46 and a pressure meter VII 47 for measuring the temperature and the pressure of the seawater entering the seawater pump are arranged between the seawater tank and the seawater pump.
A thermometer VIII 48 and a pressure meter VIII 49 for measuring the temperature and the pressure of the seawater entering the water diversion pipeline are arranged between the seawater pump and the water diversion pipeline.
Claims (4)
1. A high back pressure diesel engine bench test simulation device is characterized in that: the test simulation device is provided with an air inlet system corresponding to the diesel engine; the air inlet system is provided with a double-torsion-wire flowmeter arranged at the inlet of the pipeline, and the outlet of the double-torsion-wire flowmeter is communicated with a filter arranged in the pipeline; the inlet and the outlet of the double-torsion-wire flowmeter are respectively provided with a pressure gauge IX and a pressure gauge X, the air pressure values before and after the double-torsion-wire flowmeter and before the double-torsion-wire flowmeter enters a filter are measured through the pressure gauge IX and the pressure gauge X, and the air inlet flow is calculated by combining the environmental temperature parameters between experiments; the filter outlet is provided with a pressure gauge XI; the pressure gauges X and XI arranged in front of and behind the filter compare the air pressure difference before and after entering the filter, and the filter blockage condition is judged; the outlet of the filter is connected with an air duct type heater for heating air entering the diesel engine, and the air duct type heater controls the air inlet temperature through an internal heating element; the air duct type heater sends air into the diesel engine through a vacuum degree regulating valve, a pressure stabilizing tank and a supercharger; a thermometer VII is arranged on an air inlet pipe at a position 0.5m away from the inlet of the supercharger, and the heating power of the air duct type heater is adjusted according to the air temperature measured by the thermometer VII to form closed-loop control of heating adjustment of the air inlet temperature; a pressure gauge XII for detecting the air inlet pressure in the air inlet pipe is arranged on the air inlet pipe at a position 1m away from the inlet of the supercharger; according to the intake vacuum degree value measured by the pressure gauge XII, adjusting the opening degree of an intake vacuum degree regulating valve;
the test simulation device is also provided with a cooling system, and the cooling system is provided with a seawater tank for supplementing water to the diesel engine and the generator; the seawater tank is communicated with the water supplementing pipeline through a water supplementing valve; the seawater tank is communicated with a water return pipeline through a drainage valve; the seawater tank also provides cooling water for the diesel engine and the generator through a seawater pump; one end of the seawater pump is communicated with the seawater tank, and the other end of the seawater pump is respectively communicated with the diesel engine, the muffler and the generator through a water diversion pipeline; a control valve I and a seawater flowmeter I are arranged between the diesel engine and the water diversion pipeline, and a thermometer I and a pressure meter I for measuring the temperature and the pressure of the seawater entering the diesel engine are arranged between the seawater flowmeter I and the diesel engine; the outlet of the diesel engine is communicated with the muffler through a thermometer II and a pressure meter II which are used for measuring the temperature and the pressure of the seawater at the outlet of the diesel engine; a control valve II and a seawater flowmeter II are arranged between the muffler and the water diversion pipeline, and a thermometer III and a pressure meter III for measuring the temperature and the pressure of the seawater entering the muffler are arranged between the seawater flowmeter II and the muffler; the water diversion pipeline is communicated with the generator through a control valve III and a seawater flowmeter III, and a thermometer IV and a pressure gauge IV for measuring the temperature and the pressure of the seawater entering the generator are arranged between the generator and the seawater flowmeter III; the seawater outlet end of the generator is communicated with the muffler through a pressure gauge V and a temperature gauge V; the seawater outlet end of the muffler is communicated with the seawater tank through a control valve IV; a thermometer VI and a pressure meter VI for measuring the temperature and the pressure of the seawater at the outlet end of the muffler are arranged between the muffler and the control valve IV, the opening of the control valve IV is adjusted to control the temperature and the pressure of the seawater outlet, and the seawater passing through the control valve IV enters a seawater tank through a water return pipeline of the tank;
the exhaust after being cooled and muffled by the muffler is divided into two paths; one path is discharged through an exhaust noise measuring pipeline, and an exhaust noise sensor is used for carrying out exhaust noise test at an outlet according to standard requirements; a first thermometer for measuring the exhaust temperature of the muffler outlet of the exhaust noise pipeline is arranged at the muffler outlet position; the other path is an exhaust system of the test simulation device; the exhaust system is provided with a high-temperature electric back pressure valve I which is connected to an exhaust pipeline of the diesel engine and is used for performing cold start and hot start tests under the condition of high back pressure of the high back pressure diesel engine, and a high-temperature electric back pressure valve II which is used for performing high back pressure of the high back pressure diesel engine, and performing high back pressure ballast water blowing tests, continuous operation, back pressure fluctuation, high vacuum and high back pressure short-time operation test performance tests; the high-temperature electric back pressure valve II is communicated with a water tank for performing a low-back flow water-free allowable rotation speed test of the high-back pressure diesel engine through an exhaust external tongue valve, and the water tank is arranged at the tail end of an exhaust pipeline; the water tank is provided with a liquid level meter for measuring the liquid level of the water tank, and the liquid level in the water tank in a rotation speed test which is allowed to be used by the lowest non-backflow water is recorded to be high; the inlet end of the exhaust outer tongue valve is provided with a first pressure gauge for measuring the exhaust pressure at the front end of the exhaust outer tongue valve, and the exhaust outer tongue valve is opened when the back pressure of the exhaust outer tongue valve reaches a certain specific value; a water collecting tank for performing drainage treatment after the exhaust outer tongue valve fails and preventing seawater from flowing backwards is arranged on the exhaust pipeline between the exhaust outer tongue valve and the high-temperature electric back pressure valve II; the outer wall of the water collection tank is provided with a water jacket for cooling exhaust gas; two parallel arrangement's drainage pipe are installed to the lower extreme of header tank: a drainage pipeline I and a drainage pipeline II; the electromagnetic valve I and the electromagnetic valve II are respectively arranged on the drainage pipeline I and the drainage pipeline II; the drainage pipeline I is also provided with a liquid level sensor I and a liquid level sensor II; the liquid level sensor I and the liquid level sensor II are arranged up and down; a liquid level sensor III is also arranged in the middle of the inner wall of the water collection tank; the tail ends of the drainage pipeline I and the drainage pipeline II are communicated through a sewage draining box; in the running process of the high back pressure diesel engine, the exhaust outer tongue valve fails, seawater enters the water collecting tank along the exhaust pipeline, then enters the water discharging pipeline I and the water discharging pipeline II at first, when the water quantity is small, the seawater floods the liquid level sensor II, when the liquid level sensor I is not flooded, the electromagnetic valve I is opened, and if the water quantity of the water is large, when the seawater floods the liquid level sensor II and the liquid level sensor III, the electromagnetic valve I and the electromagnetic valve II are all opened, and the seawater in the pipe section is discharged to the sewage draining tank; if the seawater enters quickly, when the water level continuously rises to submerge the liquid level sensor III, the high-temperature electric back pressure valve II is forcibly closed, and the high-back pressure diesel engine is prompted to stop through the indicator lamp; the exhaust outer tongue valve can be used for exhausting after being opened, and can be closed in time to prevent the seawater from flowing backwards; the first pressure gauge is arranged on the front exhaust pipe of the exhaust outer tongue valve to measure the exhaust pressure at the front end of the exhaust outer tongue valve, when the exhaust pressure is larger than a specified value, the exhaust outer tongue valve is opened to exhaust, and when the exhaust pressure is smaller than the specified value, the exhaust outer tongue valve is closed to prevent the reverse flow of seawater.
2. The high back pressure diesel engine bench test simulation device of claim 1, wherein: the tail end of the exhaust pipeline is provided with an exhaust nozzle, and the exhaust nozzle is positioned in the water tank; the exhaust nozzle is in a frustum shape with a large lower part and a small upper part, and the exhaust flow speed is increased and the minimum non-backflow rotating speed is reduced by reducing the diameter of the exhaust pipe.
3. The high back pressure diesel engine bench test simulation device of claim 1, wherein: a thermometer VII and a pressure gauge VII for measuring the temperature and the pressure of the seawater entering the seawater pump are arranged between the seawater tank and the seawater pump.
4. The high back pressure diesel engine bench test simulation device of claim 1, wherein: a thermometer VIII and a pressure gauge VIII for measuring the temperature and the pressure of the seawater entering the water diversion pipeline are arranged between the seawater pump and the water diversion pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810611097.8A CN108827641B (en) | 2018-06-14 | 2018-06-14 | High back pressure diesel engine bench test analogue means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810611097.8A CN108827641B (en) | 2018-06-14 | 2018-06-14 | High back pressure diesel engine bench test analogue means |
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| Publication Number | Publication Date |
|---|---|
| CN108827641A CN108827641A (en) | 2018-11-16 |
| CN108827641B true CN108827641B (en) | 2023-09-01 |
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| CN110333080A (en) * | 2019-08-14 | 2019-10-15 | 河南柴油机重工有限责任公司 | A kind of two-shipper single-blade joint debugging arrangement and bench test simulator |
| CN110685839A (en) * | 2019-09-24 | 2020-01-14 | 西安中星测控有限公司 | Method for detecting blockage of three-filter system for vehicle based on pressure sensor |
| CN110617969A (en) * | 2019-09-25 | 2019-12-27 | 河南柴油机重工有限责任公司 | Diesel engine test bed and test method thereof |
| CN110514448A (en) * | 2019-09-25 | 2019-11-29 | 河南柴油机重工有限责任公司 | The bench test device and its test method of diesel oil substitute machine reverse-filling overflow valve |
| CN110567724A (en) * | 2019-10-10 | 2019-12-13 | 河南柴油机重工有限责任公司 | Engine exhaust anti-reverse-watering test device |
| CN110793777B (en) * | 2019-10-23 | 2021-05-25 | 清华大学 | Testing arrangement of effect is preheated in simulation diesel engine intake duct environment air admission |
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