CN2425201Y - Gaseous propellant engine - Google Patents

Abstract

The utility model relates to a gaseous propellant engine berning fuel gas, which comprises a machine body assembly, a gas distribution mechanism, a cooling and lubricating mechanism, a piston assembly, a cylinder cover assembly and a crank link mechanism. The utility model is characterized in that a gas supply system, a control system and an ignition system are distributed on the machine body; an igniting signal generator of the ignition system is arranged on the machine body; a rotary speed sensor of the control system and a machine oil pressure sensor are arranged on a flywheel casing of the machine body; an air cleaner of the air supply system is arranged on the machine body; a mixer of the gas distribution mechanism is arranged on a gas inlet of a gas inlet pipe. The utility model has the advantages that the mixing ratio of air and the fuel gas can not change following the change of working conditions in whole operational process of the gaseous propellant engine, so that a gas source can be stably outputted; the ignition is reliable; the operation of the control system is simple; the work is reliable; the structure is novel; the petroleum resource can be saved; the environmental pollution can also be reduced.

Description

Gas engine

The utility model is that the cylinder bore of inflammable gass such as a kind of special natural gas fuel, liquefied petroleum gas (LPG), biogas is 135 to 140mm motor.

Cylinder bore is 135 to 140mm diesel engine at present, owing to act as a fuel with diesel oil, more serious to pollution of atmosphere, fuel economy is poor.The China's oil shortage of resources, and that the product of rock gas, reserves develop is very fast, belongs to the oil-poor country of rich gas.Two utility model patents of CN88202971U and CN2169691Y have disclosed the oil gas duel fuel engine of gasoline engine refitting methane fuelled engine and vapour, diesel engine refitted respectively, they are not changed original motor itself, only outside machine, set up gas combustion apparatus, transform and lack science, and how not reforming cost height, fault point, and power performance is poor.

The purpose of this utility model is the environment protection type power machine tool of a kind of special use pure gas fuel of exploitation on existing at home 135 to the 140mm serial diesel engine bases.

The utility model technical solution is: the cylinder bore of inflammable gass such as a kind of special natural gas fuel, liquefied petroleum gas (LPG), biogas is 135 to 140mm gas engine, include cylinder block set, distribution device, cooling and lubricating structure, piston assembly, cylinder head assembly, connecting rod, it is characterized in that: on body, distribute air supply system, control system, ignition system are housed, the signal generator for ignition of ignition system is housed on body; Speed probe, the oil pressure sensor of control system are housed on the flywheel casing of body; The air-strainer of air supply system is housed on body; The mixer of distribution device is housed at the suction port of suction tude.

Signal generator for ignition in the ignition system of the gas engine described in the utility model is contained in the body front side, the spark coil parts are contained in the positive side of body, spark plug is contained on the cylinder head, the spark coil parts are connected with spark plug by high voltage wire, and the primary circuit of spark coil links to each other by the outer storage battery of power line and machine.Speed probe in the control system is installed on the flywheel casing, oil pressure sensor is installed in the Oil passage interface of flywheel casing, oil temperature sensor is installed on the oil sump, cooling-water temperature sensor is contained on the water-cooling tube thermostat, the rotating speed speed regulating actuator is installed on the suction tude, and it links to each other by joint shaft bearing with connecting rod with mixer.Air-strainer in the air supply system is installed in the flywheel casing top of body, is connected with the mixer that is contained in the suction tude suction port by bend pipe.Cover at mixer the anti-blistering valve of tempering is housed, the mixer lid is equipped with diaphragm with mixing between body, spool and nozzle are housed on the diaphragm, and diaphragm and mixer are equipped with spring between covering, and spool faces the outlet of fuel tube, and the air inlet adjustment valve is housed in the fuel tube.

The firing chamber of piston head is adopted and is strengthened volume, reduces the compression ratio of motor.Distribution device adopts the dedicated cam axle that is contained in middle part in the body.

During engine operation, fresh air enters mixer behind the air-strainer depurate; Also send into mixer after the further voltage stabilizing of natural gas via pressure regulator valve after stable-pressure device purifies steady pressure.Entering the air of mixer and rock gas evenly mixes in proportion and sends in the cylinder.Closure is equipped with at the place at mixer outlet, and its handle links to each other with speed control system with control air input of engine by air size, regulates engine operating condition.The rotating speed control section control motor of control system is when extraneous load variations, and its rotating speed still can remain unchanged substantially.When automatically protection control section and engine oil pressure are lower than a certain limit, rotating speed and water temperature and are higher than a threshold value; to disconnect ignition circuit; spark plug catches fire and motor is quit work; thereby can accomplish that under the situation of unattended duty motor also can safe operation, the reason engine oil pressure is not low, rotating speed is too high, water temperature is too high and damage.

When piston during near compression stroke top dead center, spark plug produces spark under the high-tension current effect, and the inflammable mixture in the some gas cylinder acutely expands gas and promotes the descent of piston acting.

The dedicated cam axle of distribution device makes that after piston walks to budc the valve overlap that can open simultaneously through exhaust valve reduces, to adapt to the burning of gaseous fuel.

The utility model has the advantages that: this machine novel structure, on homologous series diesel engine basis, removed oil-fired system, only use the novel motive power machine of gaseous fuel, its reliable operation, easy to maintenance, simple to operate, pollution reduces greatly than the homologous series diesel engine, is the ideal power equipment in the abundant area of source of the gas.Mixer adopts single equal vacuum degree mixer in the air supply system, makes the proportions of ingredients of air and fuel agent not change with the change of operating mode substantially in motor whole service process, can adapt to the job requirement of gas engine well.Ignition system adopts non-contact high-energy ignition, has improved the igniting reliability.Combustion chamber volume strengthens, and selects for use proper compression than then more to adapt to the gas fuel combustion characteristic.If fuel is made in the original emptying in vain of the use oil field oil field gas of befouling environment again, then not only saved petroleum resources but also reduced environmental pollution, use the high-quality fuel of low price can obtain required power, have considerable economic and social benefit.

Below in conjunction with drawings and Examples the utility model is described:

Fig. 1 is 135 to 140mm serial gas motor transverse cross-sectional view;

Fig. 2 is 135 to 140mm serial gas engine structure schematic representation;

Fig. 3 is the air supply system structural representation;

Fig. 4 is the mixer structure schematic representation of air supply system.

Shown in accompanying drawing 1,135 to 140 serial gas motors distribute on its body cylinder block set 1, distribution device 2, cooling and lubricating structure 3, control system 4, ignition system 5, piston assembly 6, air supply system 7, cylinder head assemblies 8 and connecting rod 9 compositions are housed.

Shown in accompanying drawing 2,135 to 140 serial gas engine igniting systems comprise the signal generator for ignition 11, the spark coil parts 16 that are packed in body 24 positive sides that are contained in body 24 front sides, are contained in the spark plug 15 on the cylinder head 8.Spark coil parts 16 are connected with spark plug 15 by high voltage wire.The primary circuit of spark coil parts 16 links to each other by the outer storage battery of power line and machine.When piston went to a certain cylinder top dead center, signal generator for ignition 11 produced fire signals, produces high-tension electricity in the spark coil parts 16, passed to spark plug 15 igniting by high voltage wire.

Control system medium speed sensor 23 is installed on the flywheel casing 25, and oil pressure sensor 22 is installed in the Oil passage interface of flywheel casing 25.Oil temperature sensor 10 is installed on the oil sump 27, and cooling-water temperature sensor 14 is contained on the water-cooling tube thermostat 13.Rotating speed speed regulating actuator 17 is installed on the suction tude 12, and it links to each other by joint shaft bearing with mixer 19 usefulness connecting rods 18.Engine rotational speed signal passes to the outer rotational speed governor of machine by speed probe 23, sends signal by rotational speed governor and gives rotating speed speed regulating actuator 17, by connecting rod 18 throttle opening on the mixer 19 is changed to reconcile engine speed.

Air-strainer 21 in the air supply system is installed in and is positioned at flywheel casing 25 tops on the body 24, is connected with mixer 19 by bend pipe 20.

Shown in accompanying drawing 3, be located at machine outer pressure pan 32 and all be fixed on the support 29 with low pressure jar 34.High and low pressure jar side is equipped with pressure gauge 31 respectively.The high and low pressure pot bottom is equipped with blowdown valve 30 respectively, reduction valve 33 is housed on the pipeline between the high and low pressure jar, be provided with pipeline at the middle part of low pressure jar 34 and be connected, in pipeline, also be serially connected with pressure regulator valve 36, arrive at last in the mixer 19 with valve 35 on the gas engine.Gas source enters military pressure pan 32 through import 28, enters low pressure jar 34 by reduction valve 33 again, and the gas after voltage stabilizing is sent in the mixer 19 from low pressure jar 34.The source of the gas suction pressure can be adjusted by reduction valve 33, and relevant pressure can be read from pressure gauge 31.Dirts such as light oil that deposits in the using process and condensed water can be got rid of by blowdown valve 30.Through the source of the gas of air supply system kept stable and being purified before entering mixer 19.

With reference to shown in Figure 4, the anti-blistering valve 39 of tempering is housed on the mixer lid 44, mixer lid 44 is equipped with diaphragm 38 with mixing 43 of bodies, and spool 42 and nozzle 40 are housed on the diaphragm 38.Diaphragm 38 and 44 on mixed gas lid are equipped with spring 41, and spool 42 faces the outlet of fuel tube 45, and air inlet adjustment valve 37 is housed in the fuel tube 45.

Work as engine start, the interior pressure of the pressure that diaphragm 38 and mixer lid is 44 and cylinder is the same to be lower than atmospheric pressure, therefore under the atmospheric pressure effect, diaphragm 38, nozzle 40 and spool 42 are pushed to the top simultaneously, spring 41 is compressed, owing to spool 42 up outlets of opening fuel tube 45, the up while of diaphragm 38 has also increased the air passageways sectional area, makes air and combustion gas form mixed gas in the mixer bottom.The aisle spare of combustion gas and air and air inflow are all with the increase of motor pull of vacuum with reduce and respective change.When engine misses, under the promotion of spring 41, spool 42 is closed the outlet of fuel tube 45, forbids the combustion gas cylinder that bleeds.

Claims (5)

1, a kind of gas engine that uses inflammable gas, include cylinder block set, distribution device, cooling and lubricating structure, piston assembly, cylinder head assembly, connecting rod, it is characterized in that: on body, distribute air supply system, control system, ignition system are housed, the signal generator for ignition of ignition system is housed on body; Speed probe, the oil pressure sensor of control system are housed on the flywheel casing of body; The air-strainer of air supply system is housed on body; The mixer of distribution device is housed at the suction port of suction tude.

2, gas engine according to claim 1, it is characterized in that: the signal generator for ignition in the gas engine ignition system is contained in the body front side, the spark coil parts are contained in the positive side of body, spark plug is contained on the cylinder head, the spark coil parts are connected with spark plug by high voltage wire, and the primary circuit of spark coil links to each other by the outer storage battery of power line and machine.

3, gas engine according to claim 1, it is characterized in that: the speed probe in the control system is installed on the flywheel casing, oil pressure sensor is installed in the Oil passage interface of flywheel casing, oil temperature sensor is installed on the oil sump, cooling-water temperature sensor is contained on the water-cooling tube thermostat, the rotating speed speed regulating actuator is installed on the suction tude, and it links to each other by joint shaft bearing with connecting rod with mixer.

4, gas engine according to claim 1 is characterized in that: the air-strainer in the air supply system is installed in the flywheel casing top of body, is connected with the mixer that is contained in suction port by bend pipe.

5, gas engine according to claim 1, it is characterized in that: be contained in the mixer on the suction tude suction port, cover at it anti-blistering valve of tempering is housed, between mixer lid and mixture diaphragm is housed, spool and nozzle have been housed on the diaphragm, between diaphragm and mixed gas lid spring is housed, spool faces the outlet of fuel tube, and the air inlet adjustment valve is housed in the fuel tube.

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