CN2913630Y

CN2913630Y - Gas engine

Info

Publication number: CN2913630Y
Application number: CNU200520140631XU
Authority: CN
Inventors: 汤洪辉; 陆守成
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-29
Filing date: 2005-12-29
Publication date: 2007-06-20
Anticipated expiration: 2015-12-29

Abstract

A gas engine having a 190 mm diameter cylinder for burning combustible gas comprises an engine assembly, a gas supply system, a cooling and lubricating means, a piston assembly, a cylinder cap assembly, a crank-link mechanism, an exhaust-gas turbine, a pressure booster and an inter-cooler. The body of the engine assembly is provide thereon with a variable speed control system composed of a speed sensor, a speed control and a speed actuator, an igniting system composed of a fire signal transducer, an ignition coil, an ignition controller and a spark plug, a gas-burning system composed of a combustible gas pipe, a shutoff valve, a combustible gas butterfly valve, a combustible gas branch pipe and a nozzle, a timing drive device composed of a timing drive mechanism and a cam shaft special for combustible gas inlet, and a safety alarm device composed of a safety explosion-proof valve, a fuel/water temperature alarm, and a fuel pressure alarm. The gas engine is characterized in that combustible gas and air are mixed and burned inside the cylinder, there is no combustible gas inside the gas inlet passage so that the phenomena of backfire and engine surge are avoided, and the gas engine has the advantages of reliable operation, convenient maintenance, easy use and less pollution.

Description

Gas engine

Affiliated technical field

It is the motor of 190mm that the utility model relates to a kind of cylinder bore that uses inflammable gass such as gas, coking gas, rock gas, liquefied petroleum gas (LPG), biogas.

Background technique

Cylinder bore is the diesel engine of 190mm at present, owing to act as a fuel with diesel oil, its exhaust is more serious to the damage ratio of atmosphere, and high diesel-fuel price causes the Economy of motor poor.The petroleum resources shortage of China, and the product of rock gas, reserves are abundanter, belong to the oil-poor country of rich gas.The patent announcement of China number repacks methane fuelled engine and vapour into for two utility model patents of CN88202971U and CN2169691Y have disclosed gasoline respectively, diesel engine refitted becomes oil, the gas duel fuel engine, this two patent itself is not changed original motor, only outside machine, set up gas combustion apparatus, transform and lack science, and reforming cost is higher, the fault point is many, power performance is poor, notification number is the utility model patent of CN2425201Y, having disclosed cylinder bore is the gas engine of having done change to former diesel engine of 135～140mm itself, its deficiency is to adorn mixer on the distribution device, enter cylinder combustion after adopting combustion gas and air mixing outside cylinder, gas burning system is easily blasted and poor stability, the thermal efficiency is low, row's temperature is high.

The model utility content

The utility model purpose is the deficiency that overcomes at present used gas engine, and a kind of environment protection type power machine tool---gas engine of using pure gas fuel of exploitation on a kind of existing at home 190 serial diesel engine bases is provided.

The purpose of this utility model is achieved through the following technical solutions, a kind of cylinder bore that uses inflammable gass such as gas, coking gas, rock gas, liquefied petroleum gas (LPG), biogas is the gas engine of 190mm, include cylinder block set, air supply system, cooling and lubricating structure, piston assembly, cylinder head assembly, connecting rod, exhaust-gas turbocharger and intercooler assembly, it is characterized in that on cylinder block set, distributing speed-adjusting and control system, ignition system, combustion gas gas handling system are housed, regularly pass device and safety alarm device.

The speed probe of the speed-adjusting and control system of gas engine described in the utility model is contained in the top of the flywheel on the cylinder block set, the speed final controlling element is contained on the timing driving mechanism of body front side, link to each other with Gas fuel butterfly valve and air conditioning butterfly valve with lever by connecting rod, speed controller is contained on the intercooler, links to each other with lead between speed controller and speed final controlling element and speed probe.The fire signal sensor of ignition system is contained in the top of the flywheel on the cylinder block set, spark coil is contained in the cylinder head front, spark coil is a capacitor discharge type, spark coil links by high voltage wire and spark plug, ignition controler is contained on the intercooler, links to each other with lead between ignition controler and fire signal sensor and spark coil.The gas inlet pipe road of combustion gas gas handling system is contained on the body, combustion gas air inlet dedicated cam axle is contained in the combustion gas inlet box on the body, gas inlet pipe and combustion gas inlet box link, cut-off valve, Gas fuel butterfly valve, combustion gas arm, the jet pipe of combustion gas on the gas inlet pipe road enters cylinder, and the combustion gas intake valve on the jet pipe contacts with cam on the combustion gas air inlet dedicated cam axle.Regularly driving mechanism is contained on the transmission case of body front shroud top, and regularly driving mechanism links to each other with combustion gas air inlet dedicated cam axle by the cross universal shaft coupling.The safety anti-explosive valve is housed respectively on combustion gas inlet box and the crankcase, oil temperature, water temperature alarm and oil pressure warning unit are housed on body, oil temperature, water temperature alarm link with temperature transducer respectively, oil temperature sensor is contained on the oil pipe of oil cooler front end, cooling-water temperature sensor is contained on the outlet pipe of high-temperature cooling water, oil pressure warning unit links to each other with pressure transducer, and pressure transducer is contained in the main oil gallery end.There is an adjustable bypass to be communicated with outlet pipe that (effect of this bypass is a rotating speed of controlling exhaust-gas turbocharger by the flue gas flow that control enters exhaust gas turbine on the exhaust gas inlet pipeline of exhaust-gas turbocharger, reach the purpose of control pressurized machine charge-air pressure and flow, flue gas flow in the bypass is big, then the flue gas flow in the exhaust gas turbine is little and rotating speed is low, the pressurized machine supercharging is low, flow is also little, otherwise exhaust gas turbine rotating speed height, pressurized machine supercharging height, flow is also big), the air outlet slit of two pressurized machines links.

The firing chamber of piston head is adopted and is strengthened the compression ratio that volume reduces motor.

Air filters through air-strainer during engine operation, the exhaust-gas turbocharger supercharging, free-air diffuser flow to the intake valve place, combustion gas is through the combustion gas house steward, the combustion gas arm, jet pipe is delivered to inlet valve port, in the suction stroke of motor, combustion gas mixed in air enters cylinder when intake valve was opened, rocking arm on the speed final controlling element of speed-adjusting and control system passes through connecting rod, lever and air-regulating valve and gas control valve link, regulate the air inflow of air and combustion gas according to the operating mode of motor, make motor when extraneous load variations, its rotating speed still can remain unchanged substantially.The oil temperature, the effect of water temperature alarm and oil pressure warning unit is respectively, when oil temperature and cooling water temperature reach a certain qualification numerical value, when lubricating oil pressure reaches a certain qualification numerical value, this alarm gives the alarm, reminds people goes to handle, do not handle if go, when the gentle coolant water temperature of machine oil is higher than this qualification numerical value, when lubricating oil pressure is lower than a certain qualification numerical value, gas burning system stops air feed and motor is quit work, thereby accomplishes under the situation of unattended duty, and motor also can safe operation, not reason oil temperature and cooling water temperature height, lubricating oil pressure is low and damage.

When piston during near compression stroke top dead center, spark plug produces spark under the high-tension current effect, and the mixed gas in the some gas cylinder acutely expands gas to promote piston and does work downwards.

Cam on the combustion gas air inlet dedicated cam makes the open and close of combustion gas valve and the time synchronization that each cylinder needs combustion gas, is beneficial to the burning of combustion gas.

The utility model has the advantages that: this machine novel structure, on homologous series diesel engine basis, removed oil-fired system, for the novel motive power machine that uses inflammable gas, its reliable operation, easy to maintenance, simple to operate, good economy performance, damage ratio homologous series diesel engine reduce greatly, are the ideal power equipment in the abundant area of gas source.Combustion gas mixes in cylinder with air, so there is not combustion gas to exist in the intake duct outside cylinder, even behind long-play, under the situation of the valve ring support of cylinder head wearing and tearing, phenomenons such as tempering is blown out, blast do not take place yet, even there is detonation to produce, the safety anti-explosive valve is housed in inlet box and crankcase, when pressure arrives to a certain degree greatly, safety anti-explosive valve automatic pressure-relieving, guarantee not blast, do not damage motor.

Description of drawings:

Accompanying drawing 1 is the transverse cross-sectional view at body of the present utility model and cylinder position, and Fig. 2 is a longitudinal construction schematic representation of the present utility model, and Fig. 3 is a gas burning system structural representation of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

Shown in accompanying drawing 1,190 serial gas engines distribute on its body and are equipped with: compositions such as lubrication system 1, piston assembly 2, connecting rod 3, cylinder block set 4, safety anti-explosive device 5, warning device 6, combustion gas gas handling system 7, timing transmission device 8, cylinder head assembly 9, ignition system 10, cooling system 11, speed-adjusting and control system 12, intercooler 13, exhaust gas turbine 14, pressurized machine 15, air-strainer 16, outlet pipe 17.

Shown in accompanying drawing 2,190 serial gas engine speed-adjusting and control systems comprise the speed probe 35 of flywheel 34 tops that are contained on the cylinder block set 4, speed final controlling element 18 on the timing driving mechanism 19 of body front side is contained in the speed controller 36 on the intercooler 13.The signal that speed probe 35 obtains is passed to speed controller 36, speed controller 36 is passed to speed final controlling element 18 to instruction, the crank of an end links to each other through connecting rod 43 and combustion gas adjusting butterfly valve 44 on the speed final controlling element 18, the crank of one end is through connecting rod 43, lever 41 and long connecting rod link to each other with air conditioning butterfly valve 38, when increasing the aperture that makes combustion gas regulate butterfly valve 44 and air conditioning butterfly valve 38 when rotating speed reduces, load increases, increase the air inflow of combustion gas and air, engine speed is remained unchanged, otherwise, when load reduces to make engine speed to increase, the aperture that makes combustion gas regulate butterfly valve 44 and air conditioning butterfly valve 38 reduces, reduce the air inflow of combustion gas and air, the rotating speed of motor is remained unchanged.

Ignition system comprises the fire signal sensor 33 of flywheel 34 tops that are contained on the cylinder block set 4, be contained in the spark coil 27 in cylinder head 32 fronts, be contained in the spark plug 30 on the cylinder head assembly 9, with the ignition controler 37 that is contained on the intercooler 13, ignition controler 37 links to each other with lead with 33 of fire signal sensors, ignition controler 37 also links to each other with lead with 27 of spark coils, spark coil 27 is a capacitor discharge type, spark coil 27 links to each other with spark plug 30 by high voltage wire 28, ignition controler 37 links to each other with the outer DC electrical source (storage battery) of machine, in the time of before piston goes to a certain cylinder compression top center, fire signal sensor 33 reaches ignition controler 37 to fire signal, ignition controler 37 makes the igniting electric capacity on the spark coil 27 produce high-tension electricity, passes to spark plug 30 igniting by high voltage wire 28.

The combustion gas gas handling system comprises the gas inlet pipe road 45, the combustion gas inlet box 26 that are contained on the cylinder block set 4, is contained in the combustion gas air inlet dedicated cam axle 20 in the combustion gas inlet box 26 on the cylinder block set 4, combustion gas arm 47, exhaust gas nozzle 48.

Regularly driving mechanism 19 is contained on the transmission case A of cylinder block set 4 front end cover plates top, and regularly driving mechanism 19 links to each other with combustion gas air inlet dedicated cam axle 20 by cross universal shaft coupling B.

Safety installations comprises the safety anti-explosive valve 29 and the crankcase safety anti-explosive valve 31 that is contained on the cylinder block set 4 in the combustion gas inlet box 26 that is contained on the cylinder block set 4, if in combustion gas inlet box 26, blast in the float chamber, then safety

anti-explosive valve

29 and 31 can automatic pressure-relievings prevents the generation of exploding, and guarantees the utility model safe operation.

Warning device comprises the engine oil pressure alarm 23 that is contained on the cylinder block set 4, oil temperature alarm 24 and water temperature alarm 25, engine oil pressure alarm 23 links to each other with oil pressure sensor 22 usefulness leads, oil pressure sensor 22 is contained in the main oil gallery end on the body 4, oil temperature alarm 24 links to each other with oil temperature sensor 21 usefulness leads, oil temperature sensor 21 is contained on the oil pipe of the oil cooler front end on the body 4, water temperature alarm 24 links to each other with cooling-water temperature sensor 42 usefulness leads, and cooling-water temperature sensor 42 is contained on the outlet pipe of cooling water.

With reference to accompanying drawing 3, the cut-off valve 46 of combustion gas on gas inlet pipe road 45, Gas fuel butterfly valve 44, combustion gas arm 47 and jet pipe 48 enter cylinder, and the combustion gas intake valve on the jet pipe 48 contacts with cam on the combustion gas air inlet dedicated cam axle 20.The aperture size of Gas fuel butterfly valve 44 is by 18 controls of speed final controlling element; jet pipe 48 is when jet to be controlled by the cam on the combustion gas air inlet dedicated cam axle 20; cut-off valve 46 is by manual control; when shutting down, needs cut-off valve 46 cuts out by operator; make combustion gas can not enter motor and get final product, cut-off valve 46 is in open mode always when motor moves.

Claims

1, a kind of gas engine that uses inflammable gas, include cylinder block set, air supply system, cooling and lubricating structure, piston assembly, cylinder head assembly, connecting rod, exhaust-gas turbocharger and intercooler assembly is characterized in that speed-adjusting and control system, ignition system, combustion gas gas handling system, timing transmission device and safety alarm device are equipped with in distribution on cylinder block set.

2, by the described gas engine of claim 1, it is characterized in that: the speed probe of speed-adjusting and control system is contained in the top of the flywheel on the cylinder block set, the speed final controlling element is contained on the timing driving mechanism of body front side, link to each other with Gas fuel butterfly valve and air-regulating valve with lever by connecting rod, speed controller is contained on the intercooler, links to each other with lead between speed controller and speed final controlling element and speed probe.

3, by the described gas engine of claim 1, it is characterized in that: the fire signal sensor of ignition system is contained in the top of the flywheel on the cylinder block set, spark coil is contained in the cylinder head front, spark coil is a capacitor discharge type, spark coil links by high voltage wire and spark plug, ignition controler is contained on the intercooler, links to each other with lead between ignition controler and fire signal sensor and spark coil.

4, by the described gas engine of claim 1, it is characterized in that: the gas inlet pipe road of combustion gas gas handling system is contained on the body, and combustion gas air inlet dedicated cam axle is contained in the combustion gas inlet box on the body, and gas inlet pipe links to each other with the combustion gas inlet box.

5, by claim 1 or 4 described gas engines, it is characterized in that: the cut-off valve of combustion gas on the gas inlet pipe road, Gas fuel butterfly valve, combustion gas arm, jet pipe enter cylinder, and the combustion gas intake valve on the jet pipe contacts with cam on the combustion gas air inlet dedicated cam axle.

6, by the described gas engine of claim 1, it is characterized in that: regularly driving mechanism is contained on the transmission case that the body front cover pulls, and regularly driving mechanism links to each other with combustion gas air inlet dedicated cam axle by the cross universal shaft coupling.

7, press claims 1 described gas engine, it is characterized in that: on combustion gas inlet box on the body and the crankcase safety anti-explosive valve is housed respectively, oil temperature, water temperature alarm and oil pressure warning unit are housed on body, oil temperature, water temperature alarm link with temperature transducer respectively, oil temperature sensor is contained on the oil pipe of oil cooler front end, cooling-water temperature sensor is contained on the outlet pipe of high-temperature cooling water, and oil pressure warning unit and pressure transducer link, and pressure transducer is contained in the main oil gallery end.

8, by the described gas engine of claim 1, it is characterized in that: respectively have an adjustable bypass and outlet pipe to link on the exhaust gas inlet pipeline of two exhaust gas turbines, the air outlet slit of two pressurized machines links.