CN104165770A - Engine endoscope cooling control device and method - Google Patents
Engine endoscope cooling control device and method Download PDFInfo
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- CN104165770A CN104165770A CN201410387900.6A CN201410387900A CN104165770A CN 104165770 A CN104165770 A CN 104165770A CN 201410387900 A CN201410387900 A CN 201410387900A CN 104165770 A CN104165770 A CN 104165770A
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Abstract
The invention mainly relates to an engine endoscope cooling control device and method. The engine endoscope cooling control device comprises a power source, a cooling air source, a JMP electronic speed relay, an air electromagnetic valve, a pressure relay, a fuel oil electromagnetic valve, an engine and an endoscope installed on an engine cylinder cover. The power source is connected with the JMP electronic speed relay, the air electromagnetic valve, the pressure relay and the fuel oil electromagnetic valve. The cooling air source, the air electromagnetic valve and the air inlet end of the endoscope are connected in series through an air pipeline. The pressure relay is connected to the air outlet end of the endoscope. The fuel oil electromagnetic valve controls start and end of fuel oil supply of the engine and is connected with the pressure relay. The JMP electronic speed relay is installed on a flywheel cover of the engine and used for automatic control over cooling air of the endoscope and used for self-protection when the cooling effect is bad. By means of the control method, it can be guaranteed that the endoscope can safely and reliably run, and production cost is saved.
Description
Technical field
The invention belongs to engine in-cylinder combustion technical field of measurement and test, the present invention relates generally to a kind of engine endoscope cooling controller and control method.
Background technology
Engine combustion is visual is that its combustion process of research is most advanced, one of the most effective laboratory facilities.In recent years, developing rapidly of optics, computing machine and high-speed graphic processing technology provides strong instrument for engine combustion is visual.The measuring technology of researcher's uses advanced both at home and abroad, design various diesel combustion visual experimental apparatus, various aspects to diesel engine in-cylinder combustion are studied, obtain the test figure of a large amount of combustion processes, for system, in depth understand that engine combustion occurs, the characteristic rule of development, further deepen understanding to diesel engine combustion and offer help for evaluation and the improvement of combustion system of diesel engine.Visual testing method is mainly divided into endoscope test in optical engine test and cylinder.Larger owing to adopting optical engine method to change engine structure, researcher adopts endoscope method of testing in cylinder more both at home and abroad.The latter need insert hard industrial tubular type mirror endoscope in firing chamber, in test, be subject to the direct effect of engine chamber high-temperature high-pressure fuel gas due to endoscope, therefore, must take good cooling provision to it, if cooling effect is bad, or cooling line stops up, can cause camera lens to cross cause thermal damage, not only affect carrying out of research work, and mostly adopt the endoscope of import, price is extremely expensive, causes larger economic loss.In current domestic endoscope test macro, also there is no and report protective device cooling about endoscope.Therefore the present invention is from endoscope job requirement, reliably cooling at work for ensureing it, needs a kind of engine endoscope cooling controller of research, to realize the self-protection under cooling unfavorable condition of engine endoscope, ensures endoscope safe and reliable operation.
Summary of the invention
The object of the invention is to design a kind of test of engine in-cylinder combustion industrial high temperature endoscope cooling controller and control method; carrying out in the experimental Study on Visualization that engine in-cylinder combustion and soot distribute; utilize this device can realize the automatic shutter of endoscope cooling-air and the self-protection of cooling effect when bad, work safely and reliably technique guarantee is provided for endoscope.
For addressing the above problem, the technical solution used in the present invention: a kind of engine in-cylinder combustion industrial high temperature endoscope cooling controller for test, this device comprises power supply, cooling-air source, JMP electron speed relay, air solenoid valve, pressure switch, fuel solenoid valve, engine and is arranged on the endoscope that engine cylinder covers; Described power supply is connected with JMP speed relay, pressure switch and fuel solenoid valve; Described cooling-air source, air solenoid valve, endoscope inlet end are connected by air pipe line; Described JMP electron speed relay is installed on the bell housing of engine; Described pressure switch is connected to endoscope outlet side, and described fuel solenoid valve is by the electric signal control of pressure switch.Described JMP electron speed relay changes the flywheel pulse tach signal of engine into electric signal, relay closes in the time that engine speed reaches starting speed, and the energising of air solenoid valve is opened.
Described JMP speed relay is made up of speed probe and controller two parts, and wherein sensor can take out the level of reflection engine speed, to promote the clutch of contact, thereby changes the tach signal of engine into electric signal cooling-air solenoid valve processed.In the time that engine speed reaches setting speed, the speed relay closing of contact, the energising of cooling-air solenoid valve is opened, and cooling-air enters endoscope.Electron speed relay changes the flywheel pulse tach signal of engine into electric signal, relay closes in the time that engine speed reaches starting speed, the energising of air solenoid valve, endoscope cooling-air is opened, in the time that the cooling-air pressure that exports out from endoscope is greater than the pressure of pressure switch setting, pressure switch action, fuel solenoid valve energising is opened, fuel oil in daily fuel tank enters engine, and engine can start smoothly.Leak or gas circuit obstruction at cooling system, endoscope outlet cooling-air pressure diminishes, while causing endoscope cooling effect bad; relay is opened automatically, and engine fuel is cut off in the solenoid valve power-off of control engine fuel oil; make automatic engine stop, thereby realize the self-protection of endoscope.
In such scheme, described JMP electron speed relay is connected a timing relay with air solenoid valve centre, described timing relay is power-off delay relay, its coil is connected with JMP speed relay control circuit, in the time that speed relay moves, timing relay coil electricity, its contact can rapid closing; And in the time of coil blackout, can set delay time back contact just disconnect, can realize like this engine shutdown after endoscope can continue cooling.
In such scheme, on described air solenoid valve, be provided with hand switch, described cooling-air solenoid valve is made up of air valve, electromagnet and hand switch.After electromagnet coil power, producing electromagnetic force overcomes spring force air valve is opened; After coil blackout, air valve is closed air pipe line automatically by spring force; Hand switch on solenoid valve can be in the time of coil fault, and the emergent hand-operated forced solenoid valve of opening, makes endoscope continue to obtain cooling.
In such scheme, described cooling-air source has been connected a sort of air pressure adjusting valve with air solenoid valve centre.
In such scheme, the pressure in described cooling-air source is set to 0.6MPa by sort of air pressure adjusting valve.
In such scheme; described endoscope is positioned in protective casing; the fibre bundle top of described endoscope is connected with cooling air inlet joint; the fibre bundle bottom of described endoscope is provided with gas outlet; cooling-air enters in protective casing through gas outlet, endoscope fibre bundle bottom, and the top of protective casing is provided with cooling-air outlet.
A kind of engine endoscope cooling control method, when engine speed is less than startup rotating speed, cooling system does not need work; In the time that engine speed is greater than startup rotating speed, the JMP speed relay closing of contact, the energising of cooling-air solenoid valve is opened, and cooling-air enters endoscope, after the cooling endoscope of cooling-air, arrives coolant outlet by protective casing, coolant outlet is provided with pressure switch, in the time that top hole pressure meets the requirements of pressure, clossing pressure relay, fuel solenoid valve automatically energising is opened, engine can start, and endoscope cooling system is normally worked simultaneously; In the time that top hole pressure is less than P, opening pressure relay contact, fuel solenoid valve dead electricity disconnects, and engine is not firing under oil condition and can not start, and cooling system is not worked.
In said method; suddenly while shutdown when engine orderly closedown or because of certain fault; engine speed declines rapidly and lower than starting rotating speed; now; JMP speed relay contact disconnects automatically; timing relay time delay disconnects opens, and cooling-air solenoid valve continues energising under the effect of timing relay, can realize endoscope after engine shutdown and continue cooling.
In said method, reveal or system electric elements damage and while causing relay to move, open the hand switch on air solenoid valve when endoscope cooling system, cooling-air endoscope is forced cooling; When after the reparation of endoscope cooling system or the eliminating of system electric elements fault, the hand switch of reset cooling-air solenoid valve, cooling system recovers automatically to control.
Beneficial effect of the present invention is mainly reflected in the following aspects.
The one, design and installation endoscope cooling controller in engine in-cylinder combustion Visualizing Test System, can realize the automatic control of endoscope cooling system.
The 2nd, can, by the start and stop of the working state control engine of endoscope cooling system, avoid, because the bad endoscope that causes of endoscope cooling system work burns out, having ensured endoscope safe and reliable operation, effectively reduce economic loss.
The 3rd, can realize the Flexible Control of cool time.By the setting to timing relay, can after engine shutdown, continue endoscope and carry out coolingly, and can regulate cool time, avoid the indoor remaining temperature of engine combustion to burn out endoscope.
The 4th, the pressure that can realize endoscope is cooling.On air solenoid valve, be provided with hand switch, system cools air leak or system electric elements damage and cause that relay cannot move, endoscope need to continue when cooling, the hand switch on air solenoid valve is opened in the manual operation of can meeting an urgent need, and makes endoscope continue to obtain cooling.
Brief description of the drawings
Fig. 1 is endoscope cooling-air flow graph of the present invention.
Fig. 2 endoscope cooling controller of the present invention structure composition schematic diagram.
Fig. 3 is endoscope cooling system control circuit figure of the present invention.
Fig. 4 is endoscope cooling system workflow diagram of the present invention.
Fig. 5 is endoscope cooling system Flexible Control process flow diagram of the present invention.
Fig. 6 is the emergent control flow chart of endoscope cooling system failure of the present invention.
In figure: 1. power supply; 2. cooling-air source; 3. sort of air pressure adjusting valve; 4.JMP electron speed relay; 5. timing relay; 6. air solenoid valve; 7. pressure switch; 8. fuel solenoid valve; 9. engine; 10. endoscope; 11. protective casings; 12. fuel tanks; 13. hand switch 14. cooling air inlets; 15. fibre bundle tops; 16. gas outlet, fibre bundle bottoms; 17. cooling-air outlets.KS is JMP electron speed relay, and KT is timing relay, and KP is pressure switch.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the invention will be further described.
Shown in attached Fig. 1 and 2; the preferred embodiments of the present invention mainly comprise power supply 1, cooling-air source 2, sort of air pressure adjusting valve 3, JMP electron speed relay 4, timing relay 5, air solenoid valve 6, pressure switch 7, fuel solenoid valve 8, engine 9, are arranged on endoscope 10, protective casing 11 that engine cylinder covers, fuel tank 12, hand switch 13, cooling air inlet 14, fibre bundle top 15, gas outlet, fibre bundle bottom 16, cooling-air outlet 17.Described endoscope 10 is positioned in protective casing 11; the fibre bundle top 15 of described endoscope is connected with cooling air inlet 14 joints; described endoscope is provided with gas outlet, fibre bundle bottom 16; cooling-air enters in protective casing 11 through gas outlet, endoscope fibre bundle bottom 16, and the top of protective casing is provided with cooling-air outlet 17.Cooling air inlet 14 joints are connected with air solenoid valve 6, sort of air pressure adjusting valve 3, cooling-air source 2 by air pipe line, and cooling-air pressure is set to 0.6MPa by pressure-regulating valve 3.The toggle speed of JMP electron speed relay 4 is set as to engine start rotating speed 300r/min, and is fixed on the turbine shell of engine 9.Timing relay 5 control circuits are in series with the control circuit of JMP electron speed relay 4 and air solenoid valve 6 respectively.On air solenoid valve 6, be provided with hand switch 13, the pressure setting that works of pressure switch 7 is 0.5MPa, and joins by the cooling-air outlet connection on air pipe line and endoscope protective casing 11, and its control circuit is connected with fuel solenoid valve 8.Power supply 1 provides power supply for relay and solenoid valve, and control circuit is as accompanying drawing 3.Fuel tank 12 is for engine provides fuel oil, and power supply 1 provides power supply for relay and solenoid valve, and control circuit as shown in Figure 3.
The method of operation of this device is as follows: in the time that engine speed is greater than startup rotating speed, the JMP electron speed relay KS closing of contact, its normally opened contact closure when timing relay KT coil electricity, the energising of air electromagnetic valve coil is opened, and makes cooling-air enter endoscope; In the time that the cooling-air top hole pressure of endoscope protective casing is greater than set pressure, pressure switch KP normally opened contact closure, fuel solenoid valve coil electricity is opened, and makes the fuel oil of fuel tank enter smoothly engine.In the time that engine speed is less than startup rotating speed, JMP electron speed relay KS contact disconnects, and because timing relay KT is that time delay disconnects relay, its normally opened contact is at time delay setup times t
0rear just disconnection, therefore air solenoid valve continues opening time t
0after close, cooling to realize the continuation of endoscope after engine shutdown; At engine shutdown t
0cooling end after time, when endoscope protective casing cooling-air top hole pressure is less than set pressure, pressure switch KP normally opened contact disconnects, and fuel solenoid valve coil losing electricity is closed, engine automatic fuel cut-off.The in the situation that of the normal work of engine and endoscope, if breaking down, endoscope cooling system can not control, now can manual unlocking cooling-air solenoid valve 6, cooling-air endoscope is forced cooling.After cold control device fault is got rid of, cooling-air solenoid valve 6 hand switches are resetted, cooling system can recover automatic control.
Control method of the present invention is as follows:
Native system cooling system workflow is as accompanying drawing 4.If engine speed is less than startup rotating speed, engine can not start, and cooling system does not need work; In the time that engine speed is greater than startup rotating speed, JMP speed relay 4 moves, the closing of contact, and 6 energisings of cooling-air solenoid valve are opened, and cooling-air enters endoscope 10, after cooling endoscope, arrives coolant outlet by protective casing 11.Coolant outlet is provided with pressure switch 7, when top hole pressure is greater than P(P=0.5MPa) time, pressure switch closure, fuel solenoid valve 8 energising is opened, and engine can start, and ensures that endoscope cooling system normally works simultaneously; In the time that top hole pressure is less than P, pressure switch contact disconnects, and fuel solenoid valve dead electricity disconnects, and engine is not firing under oil condition and can not start, and cooling system does not need work.
Endoscope cooling system Flexible Control.After just shutdown of engine 9, in firing chamber, remaining temperature is higher, must continue cooling by endoscope 10.Therefore, according to the indoor temperature of engine combustion to timing relay 5 time delay t trip time
0arrange, continue the cooling Flexible Control of endoscope after can realizing engine shutdown, avoided the indoor remaining temperature of engine combustion to burn out endoscope, control flow as shown in Figure 5.Press after engine stop button, when engine is because certain reason is can not orderly closedown time, its rotating speed must be greater than startup rotating speed, and now endoscope cooling system is normally worked, and ensures that endoscope is well cooling; Suddenly, while shutdown when engine orderly closedown or because of certain fault, engine speed declines rapidly and lower than starting rotating speed, now, JMP speed relay 4 contacts disconnect, and according to engine environment temperature, timing relay 5 time delay t trip time are set
0, cooling-air solenoid valve 6 continues energising t after engine shutdown
0time, can realize endoscope after engine shutdown and continue cooling.Be greater than t when cool time after shutdown
0time, cooling system quits work automatically, otherwise system is normally worked.
Endoscope cooling system failure is emergent to be controlled.On air solenoid valve 6, be provided with hand switch 13, damage and cause relay to move in endoscope 10 cooling systems leakages or system electric elements, endoscope need to continue when cooling, the hand switch on air solenoid valve is opened in the manual operation of can meeting an urgent need, make endoscope continue to obtain cooling, control flow as shown in Figure 6.The in the situation that of the normal work of engine and endoscope, if breaking down, endoscope cooling system can not control, now can manual unlocking cooling-air solenoid valve 6, cooling-air endoscope is forced cooling.After cold control device fault is got rid of, cooling-air solenoid valve 6 hand switches 13 are resetted, cooling system can recover automatic control; Otherwise system continues to work under the pressure state of cooling.
Claims (9)
1. an engine endoscope cooling controller, is characterized in that: this device comprises power supply (1), cooling-air source (2), JMP electron speed relay (4), air solenoid valve (6), pressure switch (7), fuel solenoid valve (8), engine (9) and is arranged on the endoscope (10) that engine cylinder covers; Described power supply (1) is connected with JMP speed relay (4), air solenoid valve (6), pressure switch (7) and fuel solenoid valve (8); Described cooling-air source (2), air solenoid valve (6), endoscope (10) inlet end are connected by air pipe line; Described pressure switch (7) is connected to endoscope (10) outlet side, described fuel solenoid valve (8) is connected with described pressure switch (7), described pressure switch (7) is used for controlling the break-make of described fuel solenoid valve (8), and described JMP electron speed relay (4) is installed on the bell housing of engine (9); Described JMP electron speed relay (4) is connected with described air solenoid valve (6), is used for controlling the break-make of described air solenoid valve (6).
2. a kind of engine endoscope cooling controller according to claim 1, it is characterized in that, described JMP electron speed relay (4) is connected a timing relay (5) with in the middle of air solenoid valve (6), and described timing relay (5) is used for the break-make of described air solenoid valve (6) to control interval time.
3. a kind of engine endoscope cooling controller according to claim 1 and 2, it is characterized in that, on described air solenoid valve (6), be provided with hand switch (13), described hand switch (13) is controlled the break-make of described air solenoid valve (6).
4. a kind of engine endoscope cooling controller according to claim 1 and 2, is characterized in that, is connected with sort of air pressure adjusting valve (3) in the middle of described cooling-air source (2) and air solenoid valve (6).
5. a kind of engine endoscope cooling controller according to claim 4, is characterized in that, the pressure in described cooling-air source (2) is set to 0.6MPa by sort of air pressure adjusting valve (3).
6. a kind of engine endoscope cooling controller according to claim 5; it is characterized in that; described endoscope (10) is positioned in protective casing (11); the fibre bundle top (15) of described endoscope is connected with cooling air inlet (14) joint; described endoscope is provided with gas outlet, fibre bundle bottom (16); cooling-air enters in protective casing (11) through gas outlet, endoscope fibre bundle bottom (16), and the top of protective casing is provided with cooling-air outlet (17).
7. an engine endoscope cooling control method, is characterized in that: when engine speed is less than startup rotating speed, cooling system does not need work; In the time that engine speed is greater than startup rotating speed, JMP speed relay (4) closing of contact, cooling-air solenoid valve (6) energising is opened, cooling-air enters endoscope (10), after the cooling endoscope of cooling-air, arrive coolant outlet by protective casing (11), coolant outlet is provided with pressure switch (7), in the time that top hole pressure meets the requirements of pressure, clossing pressure relay (7), fuel solenoid valve (8) automatically energising is opened, engine can start, and endoscope cooling system is normally worked simultaneously; In the time that top hole pressure is less than P, opening pressure relay (7) contact, fuel solenoid valve (8) dead electricity disconnects, and engine is not firing under oil condition and can not start, and cooling system is not worked.
8. a kind of engine endoscope cooling control method according to claim 7; it is characterized in that: while shutdown suddenly when engine orderly closedown or because of certain fault; engine speed declines rapidly and lower than starting rotating speed; now; JMP speed relay (4) contact disconnects automatically; timing relay (5) time delay disconnects opens, and cooling-air solenoid valve (6) continues energising under the effect of timing relay (5), can realize endoscope after engine shutdown and continue cooling.
9. a kind of engine endoscope cooling control method according to claim 8, it is characterized in that: when endoscope (10) cooling system is revealed or system electric elements damage and while causing relay to move, open the hand switch (13) on air solenoid valve (6), cooling-air endoscope is forced cooling; When after endoscope (10) cooling system reparation or the eliminating of system electric elements fault, the hand switch of reset cooling-air solenoid valve (6), cooling system recovers automatically to control.
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| CN201410387900.6A CN104165770B (en) | 2014-08-08 | 2014-08-08 | A kind of control method of electromotor endoscope cooling controller |
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| CN201410387900.6A CN104165770B (en) | 2014-08-08 | 2014-08-08 | A kind of control method of electromotor endoscope cooling controller |
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| CN104165770B CN104165770B (en) | 2016-08-24 |
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Cited By (2)
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| CN111207321A (en) * | 2018-11-02 | 2020-05-29 | 上海汽车集团股份有限公司 | Visual engine and in-cylinder lighting device thereof |
| CN113639930A (en) * | 2021-07-28 | 2021-11-12 | 长江三星能源科技股份有限公司 | Endoscope detection system and endoscope for leakage of tower top low-temperature corrosion heat exchanger |
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| CN104165770B (en) | 2016-08-24 |
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