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rubber bushing larranged parallel to the axis of the unit, at the air intake casing 29 which by the same reason does not resist materially any longi tudinal thermal expansion of the unitbut,.due to itslong leverage from the‘centre'ofgravity, essen tially adds to restraining any yawing or pitching movement, and. to a small extent also rotation about the axis of the unit. The combined compressor anli'turbine casing aretakenbytherubberpads‘isinshear. The spring ‘is and rubber pads it provide at the same time a resilient suspension of the rear end of the heat.exchangerlbi which‘issubjectedtojoltsina mobile plant such‘as a locomotive. Referringnow particularlytoFig.'7,atisthat part of the power turbine casing wherein the main bearingofthe.powerturbinerotorishoused. This ‘bearinglnotshown) isconnectedtothecasingas 2,661,593 -.' by ir-a‘di'ali.spokes .iht’of aerofoil cross section the 29—54formstherigidbasisvl'of;th;e:.unitito=which.10 outer'pa'rtpnlyof-a'horizontalspokebeingshown. the combustion chambers 82ian'clitheiheatiex changer 5i are attached, while the ‘exhaust'elbow 55 of light construction is not intended as a struc tural load carrying element. _ Referringnow toFig.3,5f;isvpartofithetma-in power turbine casing, which carries‘a“?ange55 to which the engine bearer 6 is ?anged. “The metal bonded rubber bushing iis?ttediwithiits inner shell 1 to the reduced portion 6’ of the en gine bearer 5, while theouter-shellil isprovi'ded for being fit ed into'the ‘socket o?partof the outer supporting structure, saythe~ framework of a loco motive. A chamberi3’ providedintheiiangeclportion of 'thelengine bearer 5 which is adapted to be 25 connected "with ‘the ‘coolant, preferably cool 'air underpressure. An'urnbenofbores:Q(ofwhich one only is shown) are arranged in the-casting of‘the turbine casing?si in order to deliver/this air, after:it has performed its taskas a coolant, into the m-ain'gas stream of the turbine. A‘bore iis arranged ‘in thelrerluced portionii’*of the engine'bearerin order to reduce the cross sec tionavailable tothe flow ofvheat-from the?tur» bine casing towards the rubber bushing i. This bore it is preferablyiopening "outwards ‘to allow the ac ess of cool air irorn the atmosphere. The‘casing’tit has sockets Hi5’ integral with it enclosing a cavity E55” and carrying a flange M35 towhichtheenginebear rHitis?anged. A shim 15 £86” of metal, or preferably of heat insulating ..materialis interposed between the flanges the an, and “We. The reduced portion ice or"the engine bearer:h'asvacentralbore litinordertorestrict thecrosssectionavailabletothe?ow ofheatfrom the turbinelcasing towartis the rubber bushing il! whichis ?tted'to the portion 5%’ with its in ner shell uu, preferably with a heat insulating bush ll of asbestosor the like interposed. The outer shell lot of the rubber bushing lei is ar ranged'forbeingfittedinto'thesocketofpartof the outer supporting structure, say the frame work of a locomotive. The-flange“E2ofthecantileverboom‘it bolted tothe?anges i535‘and 5%, with a toroid recess ‘l3 leftbetween the inner'parts of the flanges ‘iand H35. _ Cooling air is blown from outside through a socket ‘i into this recess 73 ‘from where it can escape through the openings '5and in the ?ange ‘#2 or through the bores ‘it and-i is of the reduced portion5as oftheenginebearer. Separate cooling air for the turbine'main bear ing may be blown through'the ducts 589 in'the spokes are of the'part ei'of the casing whereby theinflux of heat into ‘the socket let’ carrying the?ange m5 isreduced. If desired, the bore Ht may be closed-outside and the shim 12%" maybe perforated,so thatthe same air stream, after having ‘cooled the‘engine bearer is passed through thebores its as part of thecoolingmedium for‘theturbineinainbearing. vVv'hapt we claim-as our invention and desire to secure by Letters Patent is: 1. For a gas turbine plant including at least one turbine, the compressor and at least one combustion chamber'thereioriall forming a rigid unit, and 'alheat exchanger, a mounting compris ingzin‘combination: a‘pair‘ofmetalbondedrubber bushings ‘arranged Jopposite one another on a horizontal diameter ‘of the said unit, another metal ‘bonded. bushing arranged on a ra dius perpendicular to said diameter substantially in‘th'e sanievertical plane ‘acliacent the centre of the heat exchanger 5i. The weight ofthe heat exchangerBI 'isthus (30 rigidlyconnectingthefrontendofthesaidheat exchanger with the said combustion chamber and. compressona pair ofcantilever booms at tached to the said ‘rigid unit adjacent the said Referring now‘to Fig.4, theauxiliary rubber bushing iis bonrledto an inner shell ii adapted to be ?tted on a ‘spigot of'theouter supporting lbs13 structure and 'a flanged outer shell 12(attached by means of‘bolts iland'nutsioto a.?ange'lii, in turn ?xed to the compressor air intake 29. Auxiliaries to the compressor are schematically indicated at it. ‘Referring now to modi?ed generalzarrange rnent shown in Figs. ?rand ?ythe-development of this arrangement consists mainlyin' that ‘a canti lever bocrn ‘it is attached with its flanges 22 (see alsoFig. 7) to the flange 6 of each engine bearer on both sides of the gas turbine .unit. The free ends of these booms *irlcarrybraolrets ‘i’; on each of which a metal bonded rubberpad ‘i8 is attaches‘; with its lower 'metali'plate (se‘e‘also Fl '5. 8 and 9); the upper metal plate :or each rubberpad isattachedtoaplate'59’attheend of an inverted semi-elliptic spring '59 theicentre of which is attached. to a bracket 81} atth'e rear of gravity of the ‘said unit, compressed air tubes carried partly by the connectin‘e'ipipesto the com bustion chambers and the pipe on from the compressor 56 andpartly by-the spring anucanti lever boom arrangement described hereinabove. Thustheweightoftheheatexchangerx?liseven 65 means supporting the said heat exchanger tually transmitted to the engine bearers and :re- sili'ent bushings i and 2 supported. by-the base-of the power plant, such asthe main frame‘oftaloco motive. the ffree 'ends of the said cantilever booms. '2. A mounting .as claimed. in claim 1 compris ingin addition ‘a pair of metal bonded rubber pads supporting said spring ‘means on the free Di?erential thermal expansion in the 1vertical 70 ends of the said cantilever booms, and wherein thels'aid spring means'is an inverted semi-ellip~ ‘cal leaf spring having a ?at load oharacter— istio, attachedwith its middle to the middle of therearendPDF Image | MOUNTING OF GAS TURBINE UNITS
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