US1559730A - Boiler feed-water apparatus - Google Patents

Description

Nov. 3,1925- l J. MUCHKA Filed oct. 24. 192'2 l Sie -`*Patented Nov, 3, 1.92.5.

:rosas MUCHKA, or VIENNA, AUSTRIA,

'rI'oN mis-POMPES nenne, 'on rARIsyFRANcE.

ppiieation inea octobr 24, ma sen-aline 556,661.

f To aZZw'aom t may concern: l '4 Be it'kn'own'that I, JOSEFYMUGHKA, a

'citizen of the Republic of Austria, resiring'l at VI, Wall'gassev39`, Vienna, Austria,'- have invented Improvements in andlRelatingto following is a specification.v For the operation'of steamei'igines, which Y are torun with variablespeeds of revolution, such for instance asf-'those of locomotives, Ait has been4 found '.pre'feiable, more particularly Wherel eedwater heaters @are y used, to supply 4the boiler' tvithl asunueh* feed-water asis iieces'saryfto compensate;for' the steam consumption'of the locomotive, lf,

The Well-known locomotive feed pumpsofl 1 the type operated from a moving l{pait'of ther engine, hereinafter referred" to as vengine driven pumps, have the disadvantage 'that' with them the supply of feed-Water can only be regulated "in dependence on the speed 'of the locomotive, i. e. 'on the revolutions of kthe Wheels, the delivery increasing with *the stroke of the engine' in Asuch a manner, that the engine makes 4vthe greatest number oi strokes, thefresult being that, since the boiler output of a locomotive and consequently the demand made on the boiler does not increase with the increase inthe number of strokes, too much Water isv fed into the boiler, when the number of strokes o the engine isvgreat.`

Such a method ,of regulation is, however, not adequate for the operation of the`]ooile rsf` of ysteam engines, which lwith a constant y speed Workfwith a variable cut-off andtherefore With a variable steam consumption The resent invention consists inlangappa-` ble cut-off', and is'characterized `by means for varying-the quantity of Water delivered'byf thejru I `rvention permits engine driven pumps toy Abeeinployed, i. e.- pumpsoperated' :from thefvalve'v-vgear of theengine. Withl the invention, atany speedl of the engine or locomotive Wheels, a regulation of the quantity depending on the eut-ofi?l and the boiler atV any time.

load oir-the ratus or supplyingjeed-vvater to the'fboily ers of steam eng-rines operating'ivith avariziav y 'i."filieifjlike),.L Fig.v 2 shows the valve l2 in the Azero oriniddle position ofcontrol. In this` mp'or. pumps .to the boiler in accord-'f1 'ith vr,the cut-ofi of the engine. y Thus of water fed into therboiler may be eii`ected,y

lof anfarrangemeent according. to the havention, .in which the boiler feed-'Water-cisJ in AssiGNof 'fro'THE rima SOCITE'QEXPLITAJ jeetedffrom the tenderby means of a cold water pump "into a condenser for condensing l :lt-he 'exhaust steam, from which the oilhas Boiler Feed-Water.'Apparatus, offlwhieh the maticfsectional -vievv on an'enlarged scale of f a valve 4forming part of the structure, the

valve gi in one of `its 'open positions.

imilarview with the valve closed.

v gv part-ofthe' apparatusf:

n hand by the suction vpipe 2 pipefll'tola jet condenser 5 on the e le'onstructexi as engine driven ,eitlieyfjare operated directly from pump Athe valv 'gearopthe'locomotive, vior instance by'v Lani 'eccentric fdiscl which oper ates', the 'ojobtain' automatic regula n antitv-.of'tvvater deliveredlby the puinl U Y Y, f. boiler in dependence on thefoutput`y o gout., i, of the locomotive at In ord n anytime, in theconstructional example of the drawingthereis provided aby-p'ass k'1 1 from tliezdelivei'y pipe of the cold Water pump` which pipe llopiens intothe tender, and :which is capable ofbeingshut oft completenv or. partially .romfthe mainpipe 4 by a regulating member 12 (slide, valve, cock o i' position, all tliewater drawn in bythe cold detailf sectional vview of.. another .Sand on theother hand by the boiler'j'l 'The co-ld Water pump 1 coaets l and by thedelivery pipe 8 to the boiler and lconveys"tjlie': hot Water and condensate from f-hejetQeondeiiser,pinto the boilerf `The tvvo the pump reaches 'itsigreatest output when into-the tender 3. The valve includes an outer rotary plate and an inner vstationary plate. `The inner plate haseight holes 12a and the outerp'late has only. four' vapertures .12". Fig. 3 shows tlie valve l2 in the position in which the vvatei` drawn in by the cold water pump is delivered by pipe 4 into the #condenser and into the boiler. In the full `open position of the control' .lever ofy the engine, the valve 12 is-in the same position `as shown in Fig. l2, and all the water drawn in by the cold water pump is delivered by pipe 11 back into the tender 3, and the delivery of Water into the boileris interrupted. As isfwell known, the control lever is in the full-open position only for starting Aand for running idle, and the starting lasts only a( very short time. During this short period `"time, all precautions must be taken to prevent the pressure Within the boiler from lowering, a'ndfor this (reason the valve 12 is arrangedl to interrupt the deliveryof water into the boiler, during starting. The member 12 is connected to the reversing shaft 13 of the locomotive in such a manner that, according to the position of the valve gear, i. e. according to the Y'steam admitted.

to the'steamcylinder, the quantity of Water .o sucked by the pump.l.is either wholly or yonly partially or' not delivered into the boiler. The arrangement is such, as before stated,- that the regulating member' 12, which iscoupled with the reversing shaft 13, shuts oifl the' branch'pi-pe 11l entirely or opens it more or less, whereby a portion of or allthe water can be passed through the branch pipe" 11 into the watervessel 3.

TheV feed-wateripump ,is constructed to deliver to the boiler at each stroke alquantity of waterfequal to the Aquantity which,

- converted'into steam, must'be. supplied by 'the boilei` to the engine during each stroke of the engine piston or'fpistons, wheny the engine lis under maximum load,` this lmaximumy quantity beingreached at a definite cut-off. .The regulating-member connected to the valve-gear is adjusted so Ithat the whole. of the Water delivered by the pump can be passed into the boiler. At earlier cut-os than that corresponding. to the maximum load von the loctnl'iotive,` the regulating o member allows the water sucked' up byv the pump in'excess of the quantity .required to .A

replace the steam taken by 'the engine atthe particular cu-t-olfpto `pass away. As the amount of water which flows into 2the boiler during each stroke of thefeed-water pump and of the engine corresponds approximately to the steam consumption, these quantities will thus b eapproximately equal at every speed of revolution of the Wheels', consequently at vall engine speeds. For later cutoffs than vthat corresponding to the'greatest load on the locomotive, a portion of the water sucked up'y will4 also beled away, because, in practice notwithstanding the-later cut-off, the output ofthe engine Will be smaller in that the engine can only be driven boiler at full admission is necessary chieiiy for the reason that, when-the locomotive starting or running light (in which case, the motion is in full gear), no` cold water must be -fed to the boi er." fr

llien the delivery 'pipe is" open, yany variation in the pressure in the condenser 5 reacts on the pump.' If the pressure l in vthe space 5 rises,the liquid which passesfout of v the delivery pipe of the pump 1 acts against a greater pressui'e'ltha'n it does when thev pressurein the space ,5 falls lTher liquid pipe 4 at a greater or less pressure.- If, however, the delivery pipe is provided'with a branch pipe 11, then a rise 1n pressure' in `the space 5 will have the effect of permitting.- less Water to pass outfof the delivery `pipe 4 thanl at lower pressure, because the liquid takes the path ofleast resistance, i. e., thzough the pipe-11.

., will, therefore, be forced out of the delivery i To make the outflow ofl liquid from the" delivery pipe 4 independentof the pressure.

existing in the space 5, a regulable ,resistance is inserted in the delivery pipe. This resistance is vconsiderably greater than the maximum pressurev which may exist in the space 5; consequently, a regular action of.

the pump is obtained, and substantially the same quantity of Water can lalways yflow out through the delivery pipe 4,' irrespective of I vthe intensity-0fpressure in the space 5'. The' resistance may consist of a spring-loaded valve 15, whichis adapted `to close the outletA end of the delivery pipe 4 of the pump,

the spring being adjusted lso that the load onthe valve. is greater than the maximum pressure which may exist in the space 5.

Itis ofcourse, not necessary to close the l "outlet end of the pipe 4 by ,meansv of a' valve because a resistance which would act in the `same manner may beA inserted inside said Pirie f From the foregoing 1t 1s believed that the construction, operation andv advantages of the invention may be readily understood and it is apparent that changes maybe made in the details disclosedwitliout departing from vthe spirit of "the invention as expressed in the claims.

What I claim is: 1

1. The combination with afsteain-engine operating witha variable cut-oil", an engine boiler, anda lvalve gear for the engine, of

apparatus for supplying feed water to the engine-boiler, comprising a feed-Water forc- .120

ing device and means, controlled by the valvegeary of the engine, for vai-ying the quantity of water 'delivered by t-he feedwaterforcing deviceto the vboiler in accordance With-the cut-0E of the engine.

' 2. The combination with asteam-engine operating with a variable cut-oli', an engine boiler, and a valve gear for the engine,- of apparatus for'supplying feed waterto the engine-boiler, comprising a. feed-water pump and means, controlled by the valve-gear of the engine, for varying the quantity 01" water delivered vbythe pump tothe boiler in accordance with the eut-off of the engine.

3. rlhe combination with a steam-engine operating with a variable cut-oli, an engine boiler, and a valve gear forvtl'ie engine, of apparatus for supplying feed water to the engine-boiler, comprising a feed-water pump and a regulating member in one of the pipes' of the pump, and controlled by the valvegear of the engine, for governing passage of liquid through said pipe, so arranged that, at the cut-off corresponding to the greatest output of the engine, the maximum quantity of water is delivered to the boiler, this quantity being greater than that delivered at earlier or later cut-offs, and that, in the full admission position of the valve-gear, no water passes through said delivery pipe.

et. The combination with a steam-engine operating with a variable cut-ott, an Aengine boiler, and a valve gear for the engine, of apparatus for supplying feed water to the engine-boiler, comprising a feed-Water pump operated from a` moving part of the'engine, and means, controlled by the valve-gear of the engine, for varying the quantity Ofujater delivered by the pump to the boiler, in accordance with the cut-olf ot' the engine.

The combination with a steam-engine operating with a variable cut-off, an engine boiler, and a valve gear for the engine, ofv

apparatus for. supplying feed water to the engine-boiler,comprising a feed-Water pump having a delivery pipe, means, controlled by the valvegear of the engine, for varying the quantit Aof Water delivered by the pump to the boiler in accordance with the eut-off of `the valve-gear of the engine, for varying the quantity of Water delivered by the pump to lthe boiler in accordance with the cut-off of the engine, and a spring-loaded valve in said delivery pipe for maintaining the pressure therein above that existing in the space into which the Water is delivered by the pump.

't'. The combination With a steaii'i-engine operating with a variable' cutoff, ian engine boiler, and a valve gear for the engine, of apparatus for supplying feed water to the engine-boiler, compri sing a feed-water pump having a delivery pipe,`a by-pass from saidv pipe, and means, controlled by tlievalvegear'of the'engine, for governing passage of liquid through said delivery-pipe and' said ,by-pass, so arranged that, attlie eut-olf corresponding to the greatest output of the engine, the maximum quantity of water is delivered to the boiler, this quantity being greater than that, delivered at earlier or later cut-offs, and that, in the full admission 'position of the valvefgear, no water passes through said delivery pipe, but only through said bypass.

` In Witness whereofl have hereunto signed my name.

.iosEr MUCHKA.

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