US2397173A - Ship propulsion turbine arrangement - Google Patents

Description

March 26, 1946. WARREN 2,397,173

SHIP PROPULSION TURBINE ARRANGEMENT Filed April 6, 1942 I Inventor: Glenn B. Warren,

7 'His Attorney.

Patented Mar. 26, 1946 I 2 397 123 SHIPPROPULSION EURBINE J ARRANGEMENT Glenn. B .Warren; Niskayuna, AN.. Y,,. assignor to "TGeneraFEI'ectric Company, a "corporation of NewYork wApplication;April 6, 19.42, :S'e'rialiNo; 437;.779 "4 Claims. (Cl. 60;70) The :present inventionmelates .to :shinpropuliship ipropulsion .turbine-iarrangementrembodying irsionturbine.arrangementsincluding:cruising and :mytinvention. Y:

-high .pressure turbines. .;.Inarrangements-of this The arrangement show n drawing kind: it is customary .duringhigh speed-a operation prises' a high pressure :turbine all] 'awithnan :inlet .tosuppIy highapressureielasticjfluid-.to:the high valveichesthavingean inlet :I12forzreceivingihigh .-p eSSure turbine onlysandiiduring :cruisingzor low pressure elastiefluidend .a .plurality aoficontrol speed. operation .to.;supply .hightpressure elastic valves I 3 .for admitting;- fluidito several .ssections i icrossoverconduit, thereby operatinglthertwo turaturbine i I 6 having-an LinIet chest Hwithicontrol ,bines inseries. valve .means =.|'8 ccontrolled ibyca :handwheel. 9.

..crossover-:conduit and thezexhaust end :of the thesc uisin turbine'l6'in the =0fd a y*s p'r v ;ru1sing turbine thenisaconnectedzto acondenser rpulsionrarrangement .:;.are ;connected :tor drive; a

- cruising turbine-while idling ,duringeperation f" The cruisingzturbinei has :anzexhaustend-:con-

the high .pressure turbine only. .In order ztoip'ernected to ;a-::conduit;22,"which latterrmaydoecon- ..form these various functionsa-numberlof :valve ne ed y' Of a Valve lm'echanismiizil i0 .mechanisms have t be t tedtochange from either theafirststageof the high pressure turbine .oneoperation: to the th ,The-safety of :operal'0 byzmeansof a conduit -24:orto.atcondenser 25 .tion.maybe-seriously. impairedby:faultyxopera- 25 y'means-of' d s thelposifii'onishflwn =tion of .such valve mechanisms. I the conduit 22 discharges into the. conduittz lzand -Thexobject-.-of .my inventioniis toiprovideian together with the-:latter forms tatcrossovertconimproved construction and arrangement .ofzship :duit between theturbines-l-Oandl6. propulsion turbine arrangements of '.the kind The valve mechanism 23zcomprises :=a :casing ..,.above;specified whereby faulty .operation'gdueito 21 which has .three chambers, :an :intermediate t'nism controlled by the pressure difference be- "tween-a lower "stage pressure or the cruising turbine and the first-stage 'nozzlepressure of "the high pressure turbine.

- fluid tothe.cruisingturbinecnly .and .toiexhaust .iofia first .turbineistage d4. Thexvarious LVBIIVBS .the fluid dischargedifrom .the .cruising turbine :inithechestllarecontrolledaibyaa handwheel.:l5. into the high pressure qturbine by means. .of a 310 ..In;.addition; the...arrangementzincludes ..a cruising During operation .of @the1high-ipressure tturbine The :cruising "tu bin as iaiplurality f Stages with high, pressureelasticfluidthe:cruising turiwithcibucket .wheels -2lli fastened 1to2as1shaftx2L ibineis .disconnected-bymeans of.sa-1valve.in:the- 15..The2shafts of :the highpressureLturbineifllaancl to. maintain the cruising turbineuunder vacuum :sh ps p ope e ou e intermediary 10fi a and thereby to avoid excessive heating of. the sspeed-re ucin :"g

errors by the operator inhandling the various 'chambergzahavingan inlet :conn fi w r o valve mechanisms is substantially eliminated. .duiti22, a=1owerachambera29 for z'cemmunication This. is accomplished in-acoordance with: .my :inwith :the chamber :28 :and having an 2 outlet: convention by the provision of animproved valve nectedto-the conduit 2B,zandzanzupperzchamber .mechanism and means for automaticallya'ctu- .3.0'jfor:.c.ommunication withthe chambersZBrand .atingsuch mechanism upon change fromcruiswith an outlet'connected-tothe conduit-:24. :The ing operation toihigh pressureturbine or ,high communication .between the :chambers'. 28, i29ris speedoperation and vice versa. controlled by a valve ldiSk 3| and the :communi- In a preferred. embodiment aavalvev mechanism -10ation1between the chambers 328,:30 iszcontrolled for-connecting the exhaust end of...the:cruising by another Valve disk The disksflflfiand'lu m in one position in Series withigthe ,high are :secured to a common va1ve':stem::33.. In the ipressure turbine and'iin another :position to a P95311011 shown the diskfslf'engageslitsiseaL 1711118 condenser :01" the like is actuated by a hydraulic g z i gg gg gg' t g g gg gggfigi' anotor or diiferentlal pressure responsive .mecha. permittingmhe flowiof fiui d 1' from; the icon dung: 2 into the. conduit f 24. The :valve mechanismrisdn this.v position during ,cru-isingoperation whenxthe valves I8 of thercruising turbine;l:6:are:open:and

v the inlet valves l,31of;the:hi ha. ressureiturbine For a consideration .of whatlibelieve tobeg novel and my invention, attentionv is directed to The Name; mechanism during isuchmpemtiom is the follo description and the filaims appended automatically moved into-and heldimthe position thereto in connection with the accompanyi shown by means of a differential pressure respondrawing. sive device 34. This device includes a servo-motor The single figure of the drawing illustrates a having a cylinder 35 with a piston 36 mova'biy turbine.

Vi ing of the valves l3.

disposed therein and secured to a stem 31, which latter forms a continuation of the valve stem 33. The piston 36 is biased upward by means of a compression spring 38 "disposed-within an extension 39 of the casing 35 and having an upper end engaging a spring plate 40 secured to an ex tension il of the piston 31. The upper end of the extension 4 l engages 'a screw42 having an outer end "secured to an emergency handwheel'to permit manual closing of the'valve 32 for high speed operation upon failure of the automatic mechanism. The piston 36 withinthe 'casing35 7 forms a lower and an upper pressure chambert' The lower chamber underneath the piston 36 is connected by a pipe 43 to alower stage of the cruising turbine and thereby is subjected to low stage pressure of the latter. The upper chamber above the piston 36 is connected by a, pipe 44' '1 to a higher stage, preferably the first stage of the high pressure turbine I0, andthereby is sub-' ject to the pressure of the first segment or section of the first stage nozzle. In the position shown the pressure in the upper chamber is low because the valves I3 of the high pressure turbineare closed-and the pressure thenexisting .aheadof' the first stage of the high pressure turbine is the spring '41 holds the piston in its upperlend position in which the valve disk 36 is fullyopen and the disk 23 is closed. During high speed operation the cruising turbine is shut down by 0105-.

thereof, I desire to have it understood that the apparatus shown'is only illustrative and that the invention may be carried'out by other means.

What-I claim as new and desire to secure by Letters Patent ofthe United States is:

1. Ship propulsion turbine arrangement for cruisingand high speed operation comprising a cruising turbine, a. high pressure turbine, a condenser, means including a valve mechanism for connecting in one position the turbines in series and for connecting in another position the cruising turbine to the condenser, and means for autoa matically reversing the position of the valve mechanism in response to change from cruising,

to high speed operation and vice versa, said means includinga device responsive to changes of the 7 pressure difieren'ce between a high pressure stage of one turbine and a low pressure stage of the 7 other turbine.

2. Ship propulsion turbine arrangement. for cruising andhigh 'speed'operation comprising a cruising. turbine, a high pressure turbine-awnj denser, means including a valve mechanism for connecting in one positionthe turbines in series and for connecting inanother positionthe cruis {ing turbine to the condenser, and means for auto- ;matically reversing the position of the valve mechanism upon" change from cruising to high ing of the valves 18 by means ofthe handwheel i9 and the high pressure turbine valves l3 are opened by means of the handwheel i5. To assure safe operation it is important that the position of the valve disks 3| and 32 is reversed upon openplished automatically becauseupon the opening of the first valve [3 highpressure'is set up in the upper chamber above the-piston 36 and the force exertedby this high pressure causes .downward movement of the piston 36 against the biasing force of the spring 38 and theforce of the pressure existing in the lower chamber below the pis ton 36.:'Downward'movement {of thepi ston 36 causes closing of the valve disk 32 and opening of the valve disk 29, thereby connecting the "exhaust-conduit 22 ofthe cruising'turbine to the condenser 25. Vice .versaj upon closing of the high pressure turbine valves 13 by the handwheel. [5 and opening of the cruising turbine valves [8 by the handwheel IS the valve disks 3|,- 32 are moved into the position indicated in r the drawing. 1

Thus, with my invention I have accomplished an improved construction and arrangement/ofv ship propulsion turbines whereby the position of a valve mechanism including a valv'efor cone. necting the cruising'turbine" and the high pres sure turbine in series andanothervalve forconnecting the cruising turbine to a condenser is automatically reversed upon'change from cruising to high speed operation, and vice versa;

Having described the method of operation of my'invention,-together with the apparatus which I now consider to represent the best embodiment This reversing is accom speed operation and 'vice versa, said means i'ncluding a device responsive to the pressure-differencebetween the pressures in an intermediate stage of the cruising turbine and ma highpr'essure stage of. thehigh pressure turbine.

3;v Ship. propulsion turbine arrangement cornprisinga high pressure turbine having'an inlet valve for controlling the now of high'pres'sure :elastic fluid thereto-during high speedoperation, a cruising iturbine having an inlet valve for 'con trolling the flow of highypressure elastic fluid theretoduring cruising operation, a crossover conduit for conducting exhaust fiuidfrom the cruising turbine to the high pressure turbine during cruising: operation, a valve in "the cross'o'ver conduit to interrupt communication betweenthe rcruising turbine andithe high pressure tu'rbine during high speed operation, and means-include I ing a. device responsive tdchangeso f the inlet pressure of the high pressure turbine :foif autbconduit for conducting exhaust fluid rate the cruising turbine to the high pressure turbine 'dur-- matically positioning the last namedvaIveFupon change from cruising tolhigh speed operatic vice versa. a 1

4; Ship propulsion turbinearrangement pomprising a high pressure turbine having an inlet valve for controlling the'flow of high pressure elastic .fiu'idthereto during high speed'operation,

a cruisingturbine having an inlet valve iorg controlling the flow of high'pressure elasticjfiuid thereto during cruising operation, a crossover cruising operation, a valve in the crossover conduit to interrupt ,communicationfbetween the V cruising turbine and the high pressure turbine pressure turbinerespectivelyl during high speed operation, and meansforrautomatically positioning-the last named valve upon change from cruising to high speed-operation-and vice versa,;said means including a differential pressure responsive device. having two pressure chambers communicating ..with a lowens'tage of the cruising turbine and a'higher'stag ofthefhigh GLENN

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