SE174635C1

SE174635C1 -

Info

Publication number: SE174635C1
Authority: SE
Publication date: 1961-01-01

Description

Uppfinnare: L T Collin Vid tvataktsmotorer foreligger som bekant vissa svarigheter att fa tillfredsstallande mangder spolluft vid alla belastningar och driftsforhallanden iona motorns spolluftkompressor drives entlart med hjalp av en avgasturbin. Det bar radar foreslagits olika arrangemang, .som inneburit anordningar far tillfiirande av tillskottsenergi till kompressoraxeln liksom aven .sadana som innehMlit en separat driven kompressor anordnad i serie eller parallellt men den avgasturhindrivna spolkompressorn. I det senare fallet är dock risken for pumpningsfenomenen vid spolkompressorn stor, och en serickoppling av de hada kompressorerna är darfar .att fOredraga, Luften oinedelbart omkring motorn uppvarmes enom straining frail motorn ,och .det Or darfiir icke lampligt att man later spolluftkompressorn suga in luft ,direkt fran maskinrummet, .utan man bor ordna luftintaget att kompressorn kan arbeta med sä kall luft som mojligt. Maskinrummet forses samtidigt med en .fristaende anlaggning for .tiliforsel nv ventilationsluft i vilken ,det ingar minst en andra av en separat kraftkalla driven •Itift'compressor. Inventor: L T Collin As is well known, with two-stroke engines there are certain responsibilities to obtain a satisfactory amount of purge air at all loads and operating conditions. The engine's purge air compressor is driven solely by means of an exhaust turbine. Various arrangements have been proposed which have involved devices for supplying additional energy to the compressor shaft as well as those containing a separately driven compressor arranged in series or parallel but the exhaust gas purge compressor. In the latter case, however, the risk of the pumping phenomena at the purge compressor is great, and a series connection of the hot compressors is necessary. The air around the motor is heated indistinguishably by straining the frail motor, and , directly from the engine room, .without living, arrange the air intake so that the compressor can work with as cold air as possible. The engine room is simultaneously provided with a free-standing system for supplying ventilation air in which at least one second of a separate power-driven compressor is provided.

Med ,hansyntagande till ovan niiiiinda forhallanden utfores enligt uppfinningen lufttillfarselanordningen till maskinrummet pa qt.- dant Mitt, att den avgasturbindrivna spolluftkompressorns inlopp anslutes till en ledning, som lampligen star i .forbindelse med atmosfaren utanfor maskinrummet, van amte den andra luftlkompressorns trycksida fir 'anslutbar till tva var for sig avstangbara avloppsledningar, .av vilka den ena star i forbindelse med en kanal i ventilationsanlaggningen och den andra är ansluten till spolluftkompressorns inloppsledning, mellan .denna kompressors inlopp ,och ,ett I ledningen anbragt avstangningsorgan. In view of the above-mentioned conditions, the air supply device to the engine room is designed according to the invention in the middle, so that the inlet of the exhaust gas turbine compressed air compressor is connected to a line which is suitably connected to the atmosphere outside the engine room. two separate detachable drain lines, one of which is connected to a duct in the ventilation system and the other is connected to the inlet line of the purge air compressor, between the inlet of this compressor, and, a shut-off means arranged in the line.

A hifogade ritning visas schematiskt uppfin ningen tillampad vid maskinrumsanlaggningen ilia ett fartyg. The accompanying drawing schematically shows the invention applied to the engine room installation in a ship.

Fran den icke visade motorn komma aydaser cfenom en ledning 1 fram till en turbin 2. De expanderade gaserna lamna ,denna ,ge.- nom en ledning 3 och foras eventuellt till en icke visad avgaspanna. Turbinen, som lampligen Or anordnad i nara anslutning till Ma-torn, driver en spolluftkompressor 4, vars inlopp Or anslutet till en ledning 5, som star i .direkt forbindelse med atmosfaren utanfor maskinrummet. Den insugna luften, som Or belt opaverkad av temperaturen 1 maskinrummet, renas forst i ett filter 6, och Vices efter kompressionen from till motorn genom en ledning 7. maskinrummet finnas ftirutom huvirdinotorn .ett visst antal bidipmotorer som behiiva luft, cob det ,ar aven nodvandigt att forutom den normala ventilationen an rummet siirja for tillforsel .av tuft 1 tillracklig mängd for borttransport an den varme som stralar ut fran motorerna. Det filmes .darfor alltid en eller Vera ventilationsflalktar, ,som genom ett kanalsystem ,skoter am att warje del an maskinrummet far sin avsedda del luft. From the engine (not shown) aydases cfen through a line 1 arrive at a turbine 2. The expanded gases are left, this one, through a line 3 and possibly fed to an exhaust boiler (not shown). The turbine, which is suitably arranged in close proximity to the engine, drives a purge air compressor 4, the inlet of which is connected to a line 5, which is in direct connection with the atmosphere outside the engine room. The intake air, which is unaffected by the temperature in the engine room, is first purified in a filter 6, and Vices after compression from to the engine through a line 7. the engine compartment is in addition to the hood dinotor. A certain number of bidip motors which retain air, cob it, are also it is necessary that, in addition to the normal ventilation of the room, there is a sufficient amount of tuft to supply the heat radiating from the engines. It is therefore always filmed one or Vera ventilation flaps, which, through a duct system, scooter am that each part of the engine room gets its intended part air.

A ritningen visas en sadan 'flfikt 8, .soin Or sa anordnad att den tillfalligtvis kan anvandas .sasom tillsatskompressor vid start av huvadmotorn saint vid drift av denna pa laga helastningar, da ,avgasernas enei7si icke Or tillrackhg for tillfredsstallande drift an turboaggregatet. The drawing shows such a valve 8, .soin Or arranged so that it can be used incidentally as an auxiliary compressor at the start of the main engine saint during operation of this at full loads, then, the exhaust gas exhaust is not Or sufficient for satisfactory operation of the turbocharger.

Tillsatskompressorn fir med sitt inlopp ansluten till luftinloppsledningen ,och den anger normalt luft cenom en ledning 9 till nagon plats i maskinrummet, t. ex. 1 narheten av huvudmotorn. The auxiliary compressor connects with its inlet connected to the air inlet line, and it normally indicates air through a line 9 to some place in the engine room, e.g. 1 near the main engine.

I anslutning till tillsatskompressorn finnes ett antal spj011, som ..gor det mojligt att alternativt utnyttja .densamma som forkompressor for .spolluftkompressorn. Tillsatsikompres- 2— — sorns inlopp 10 stres salunda av ,ett 11 och. .dess ordinarie avlopp till ledningen 9 av ett andra spj all 12. Kompressorn har aven ett andra avlopp 13 forande till ledningen vilket styres av ett tredje .spjall 14. Tillsatskompressorns inlopp och dess .andra -avlopp aro anardnade pa vardera ,sidan av 'ett huvudspjãll 15 i ledningen 5. In connection with the auxiliary compressor, there are a number of spoon 011s, which make it possible to alternatively use the same as a pre-compressor for the purge air compressor. The inlet 10 of the additive compressor is thus stressed off, an 11 and. its ordinary drain to the line 9 of a second chute 12. The compressor also has a second drain 13 leading to the line which is controlled by a third chute 14. The inlet of the auxiliary compressor and its second chute are arranged on each, the side of a main damper 15 in the line 5.

Nar motorn gar med normal belastning arbetar kompressorn 8 som ventilationsflakt. Spjallen 15 och 12 aro oppna under ,det att spjallet 14 ,b.r stangt. Luftstrommarna folja de streckade pilarna, dys. en strum gar direkt genom ledningen 5 fram till spolluftkampressorn och en annan grenar ut sig fran 5 .och rsar .denom ledningen 9 ut i maskinrummet. o o Vid start av motorn, eller vid lag belastning dr varmen i maskinrummet icke sa besvarande .och .det är mojligt att minska luftmangden hit. Iluvudspjallet 15 samt 'spjallet 12 stanges och istallet oppnas spjallet 14. Lullstrommens vag foljer .dd den h:eldragna pilen, dvs. all lull till motorn passerar -forst tillsatskompressorn 8 ,och sedan spolluftkompressorn 4. Den forstnamnd-a maste vara sh ,dimensionerad att den kan leverera en luftmangd, som svarar mot motorns luftbehov vid ifragavarande laga belastningsomrade. When the engine is running at normal load, the compressor 8 acts as a ventilation flap. The slats 15 and 12 are open below, that the slat 14, b.r closed. The air drums follow the dashed arrows, nozzle. one stream goes directly through the line 5 to the purge air compressor and another branches out from 5 and thereby rises the line 9 into the engine room. o o When starting the engine, or at low load, the heat in the engine room is not so responsive .and .it is possible to reduce the amount of air here. The slat 15 and the slat 12 are closed and instead the slat 14 is opened. The vaginal lull follows the hdd-drawn arrow, ie. all the wool to the engine passes -first the auxiliary compressor 8, and then the purge air compressor 4. The former-a must be sh, dimensioned so that it can supply an air volume which corresponds to the engine's air requirements at the respective load area.

Ovan visade och beskrivna utfOringsform Sr endast ett exempel pa uppfinningen, vars detaljer kunna variera pa manga satt inom ramen for efterfoljande patentansprak. Avstangningsorganen for de ,olika ledningarna, som visats .sasom enkla spjall fa i praktiken givas en utformning, som ifraga om storlek och utseende avpassas sd att minsta stromningsforluster .uppstft. Tillsatskompressorn kan naturligtvis vara forsedd med egen insugnings]edning ,och den behliver ,ej placeras omedelbart intill spolluftkompressorns insug ningsledning, utan kan vara 16rbunden med derma genom en Ifingre eller kortare tryckledning. The embodiment shown and described above is only an example of the invention, the details of which may vary in many ways within the scope of the appended patent claims. The shut-off means for the various lines shown, such as simple dampers, are in practice given a design which, in terms of size and appearance, is adapted so that the smallest flow losses occur. The auxiliary compressor can, of course, be provided with its own intake line, and it does not have to be placed immediately next to the intake line of the purge air compressor, but can be connected to it by means of a one-finger or shorter pressure line.

For drift av tillsatskompressorn 'anvandes en godtycklig kraftkalla, lampligen en el-motor som medgiver en bekvam placering av tillsatsaggregatet. De ,olika avstangningsorganen kunna anordnas att omstallas for hand eller med hj,alp av en fjaderman5vrerad apparat av godtyckligt, i och fiir ,sig diant slag. For the operation of the auxiliary compressor, an arbitrary power source is used, preferably an electric motor which allows a convenient placement of the auxiliary unit. The various shut-off means can be arranged to be adjusted by hand or with the aid of a spring-operated apparatus of any kind, in and of itself.

Claims

Claim claim: Air supply device for such machine ruins, which comprises on the one hand a two-stroke engine, provided with a purge air compressor (4) driven by an exhaust turbine (2), and a second air compressor (8) driven by a separate power source, system for supplying ventilation air to the engine room, characterized in that the inlet of the purge air compressor (4) is connected to a line (5), which is suitably connected to the atmosphere outside the engine room, and that the pressure side of the other air compressor (8) is connectable to two separate drain lines, one of which is connected to a duct (9) in the ventilation system and the other is connected to the inlet line (5) of the purge air compressor, between the inlet of this compressor and a shut-off means (15) arranged in the line. : Patentskrifter friin Frankrig 684 902; Schweiz 160 008; Tyskland 883 528, 497 194. Stockholm 1061. Kungl. Boktr, PA Norsted t & Saner. 010089