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US 8,237,303B2 34 turbine blade 13, the turbine blade 13 can be rotated easily sloping surface 31a of the generator housing 31 and the Withoutanyfrictioninsidetheturbinehousing11.Inaddition, conicalouterslopingsurface53oftheWorking?uidpenetra the?uidinjectionnoZZle15canbesymmetricallydisposedat the outside of the turbine blade 13 so as to perform injection oftheWorking?uid. Also, the Working ?uid penetration-preventing means 50 is rotated together With the rotation of the rotary shaft 35 so as topreventpenetrationoftheWorking?uidfromtheturbine10 intothegenerator30. tion-preventingmeans 50. Here, the cooling tube 71 is penetratingly mounted in the generatorhousing31.TheinjectionnoZZle73isconnectedat one end thereof to a distal end of the cooling tube 71 and is positioned at the other end thereof in proximity to a point betWeentheinnerslopingsurface31a ofthegeneratorhous ing31andtheconicalouterslopingsurface53oftheWorking ?uidpenetration-preventingmeans50.Thus,WhentheWork ing ?uid penetration-preventing means 50 is rotated, the cooled air is supplied to the front side of the Working ?uid penetration-preventingmeans 50 sothatthe?oW oftheWork The Working ?uid penetration-preventing means 50 includes: a disc-like rotating member 51 having a conical outer sloping surface 53 formed on a front side thereof so as to be brought into close contact With a sloping surface 31a formedontheinnerfrontsideofthegeneratorhousing31and ing?uidisforciblypushedtoWardtheturbine10Whilebeing an insertionhole 55 penetratingly formed axially inthe center oftherotatingmember 51;andretainingmeans 57adaptedto alloWtherotatingmember51toberetainedbytherotaryshaft 35. The Working ?uid penetration-preventing means 50 is retaininglyheldinastateofbeing?ttedaroundtherotary 20 shaft35 sothatitisrotatedtogetherWiththerotationofthe rotary shaft 35 so as to prevent penetration of the Working ?uid from the turbine 10 into the generator 30. In addition, the retaining means 57 includes a retaining groove 57a formed on the inner peripheral surface of the 25 insertionhole55 oftherotatingmember 51,a?xinggroove 57b formed on the outer peripheral surface of the rotary shaft 35,andaretainingpin57c?ttedintotheretaininggroove57a andthe?xinggroove57b. TheWorking?uidpenetration-preventingmeans50further 30 includes friction-reducing means 60 adapted to minimiZe the friction betWeen the outer sloping surface 53 and the sloping surface 31a. Preferably, the friction-reducing means 60 is composed of a plurality of ?ne slits formed on the outer slopingsurface53oftherotatingmember51. cooled so that the Working ?uid from the turbine 10 is pre ventedfrombeingpenetratedintothegenerator30. As describedabove,thepresentinventionhasanadvanta geouseffectthattheWorking?uidfromtheturbineisblocked frombeingpenetratedintothegenerator,therebyimproving thee?iciencyofpoWergeneration. Also,thepresentinventionhasanadvantageouseffectthat the Working ?uid from the turbine is blocked from being penetratedintothegeneratorWhilereducingafrictionalforce generatedWhenblockingthepenetrationoftheWorking?uid. Further, the present invention has an advantageous effect thattheWorking?uidpenetration-preventingmeans isrotated WhilepressuriZingtheinnerslopingsurfaceofthegenerator housing in a state of being in close contact With the inner sloping surface, so that Working ?uid from the turbine is preventedfrombeingpenetratedintothegenerator. Moreover,thepresentinventionhasanadvantageouseffect that cooled air is supplied to a structure of blocking penetra tion of the Working ?uid from a turbine into a generator, thereby facilitating the blocking of the penetration of the Working?uid. 35 Here,the?neslitsconstitutingthefriction-reducingmeans WhilethepresentinventionhasbeendescribedWithrefer 60maybeformedintheshapeofaradial,grid,combpattern or the like. In this case, the ?ne slits function as airpockets for therein accommodating cooled air Which Will be described latersoastopreventpenetrationoftheWorking?uidfromthe 40 turbine 10 into the generator 30. encetotheparticularillustrativeembodiments, itWillbe understood by those skilled in the art to Which the present invention pertains that the technical construction of the presentinventioncanbeimplementedinotherconcreteforms Withoutmodifyingthetechnicalspiritoressentialfeaturesof Preferably,theWorking?uidpenetration-preventing thepresentinvention. means 50 is mounted around the rotary shaft 35 in such a fashion as to be brought at a front end thereof into close contactWiththeslopingsurface3111formedontheinnerfront 45 side of the generator housing 31 and is brought at a rear end thereof into close contact With a front end of the ?rst bearing 37 sothattheWorking ?uidpenetration-preventingmeans 50 is rotated While pressuriZing the inner sloping surface 31a of thegeneratorhousing31. 50 Here, since the conical outer sloping surface 53 of the Working ?uid penetration-preventing means 50 isrotated While pressuriZing the inner sloping surface 31a of the gen erator housing 31 in a state of being in close contact With the innerslopingsurface3111,theWorking?uidfromtheturbine 55 10 is not penetrated into the generator 30 but stays inside the turbine 10. The organic rankine cycle (ORC) turbo generator of the present invention further includes an air supply unit 70 adaptedtosupplyairtoasideoftheWorking?uidpenetra 60 tion-preventing means 50 so as to prevent penetration of the Working ?uid from the turbine 10 into the generator 30. The airsupplyunit70includes:acoolingtube71adaptedtoalloW cooledairsuppliedfromtheoutsidetobeintroducedintothe generatorhousing31therethrough;andainjectionnoZZle73 65 adapted to inject the cooled air introduced into the generator housing 31 through the cooling tube 71 betWeen the inner Therefore, the disclosed embodiments should be consid ered in vieW of explanation, but no limitation. The technical scopeofthepresentinventionistaughtintheappended claims, but not the aforementioned detailed description. All modi?cationsorchangesderivedfromthemeaningandscope of the claims and the equivalent concept thereof should be construed as falling Within the present invention. What isclaimedis: 1. An organic rankine cycle (ORC) turbo generator for preventionofpenetrationofaWorking?uid,comprising: a turbine (10) including a turbine housing (11), a turbine blade(13)rotatablymountedinsidetheturbinehousing (11), a ?uid injection noZZle (15) mounted inside the turbine housing (11) so as to inject the Working ?uid to the turbine blade (13); a generator (30) including a generator housing (31) con nectedtotheturbinehousing(11),arotor(33)rotatably mounted inside the generator housing (31) and a rotary shaft (35) mounted to the turbine blade (13), and a ?rst bearing (37) and a second bearing (38) mounted at the front and rear ends of the rotor (33), respectively, so as to supporttherotationoftherotaryshaft(35);and Working ?uid penetration-preventing means (50) mounted around the rotary shaft (35) and adapted to block the pressure generated from the turbine (10) so as to preventPDF Image | ORGANIC RANKINE CYCLE (ORC) TURBO GENERATOR
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