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Patented Mar. 18, 1947 2,417,60 -U,N-IT‘ED STATESv2,417,6P00ATEN'T YOFI'FICE’ ' MULTISTAGE RADIAL FLOW TURBINE William B. Jutte, Los Angeles, Calif. ApplicationOctober.6,1945,SerialNo.620,713 8Claims. (01.253-79) ' ,1‘‘2 The invention relates to an improvement in a multi-stage radial ?ow turbine actuated by steam orother?uid. Theinventionalsorelatestoa multi-stage turbine which is reversible, and to a rotarymachinewhichmaybeemployedasa for reverse operation. , . _ V . blower or compressor, ' . '.In my co-pending application, S. N. 575,163, ?led January 29, 1945, for Turbine, there is dis closed and claimed a turbine or compressor wherein the stator and rotor are each provided 10 ‘been proposed heretofore to provide a disk-type‘ with a set of dead end ?uid channels closed at one end with provisions for transferring the ?uid from a channel in one set to a channel in the other set at the crossing point thereof. rotor and stator having intersecting channels, such channels have heretofore been provided with an inlet at the inner end of both arrays of chan nels and with an outlet at the outer ends of both arraysofchannels, Thepresentinventionisan, improvement on that arrangement in that by providing a part only of,the path in one channeh, and other parts in other channels, the crossing An object of the present invention is to make use of the channel arrangement disclosed and claimed in the former application and extend it tomulti-stageoperation. Thisisaccomplished byemployinginoneofthestatororrotormem pointdeterminesthelocusofshiftfromoneto bers an additional set of dead end channels which areclosedatbothendsasaconnectinglinkbe-, orcausedtochangeitsdirectiononleaving‘one tween two sets of dead end channels in the other stator or rotor member, the ?uid path between the inlet and the exhaust extending partly through a channel in one member, partly through a link channel in the other member, and partly through a channel of' another set in the ?rst member, the transfer or shift from one tothe' otheroccurringatthecrossingpointsofthe'?rst andsecond,alsosecondandthirdarraysofchan 30 channelpathintherotorandtheforceofsuch; nels, with an impulse thrust occurring at each reaction increases as the crossing point progresses _ crossing point and reaction thrust occurring alongtherotorchannelatonesideofthecrossing‘ creases. ‘ , v 3 -; ‘ point. As in the former application, the invention pro vides a turbine which employs both reaction and impulse principles. An impulse-reaction type of turbineis,ofcourse,alreadyknown. Thepresent type of turbine is rather complicated and costly in that it employs rings of moving blades inter spersed with rings of ?xed blades, the moving blades being arranged on the circumference of a drum along the periphery of which the steam progressesasitexpands,thedrum increasingin diameter for multi-stage operation. The present invention provides a multi-stage turbine having low speed with high velocity of ?uid, having low Weight and low cost per H. P., good e?iciency at a wide range of speeds and re-' versibility by reversing the direction of ?ow‘. While some efficiency is lost in reverse operation, this is not of particular moment as in marine work for example, operation in reverse is not maintainedforprotractedperiodsoftime. Also, thesingleturbineofthepresentinventionwhich 55 ‘canbereversedbyreversingthedirectionof??ow, has obvious advantages in cost and space over‘ theusualarrangementwheretheturbinecannot be thus reversed, necessitating a separate turbine By way of example, the invention is illustrated as applied toa disk-type rotorand stator, al though other surfaces of revolution'such as con centric cylinders could be used. While it‘has the other, the steam or the like being de?ected 1 outwardly, while the impulse force, likewise, in-' The thrust is substantially continuous because the construction above-described provides'a corn; “ posite channel, having one or more parts in the ' rotor and the‘ remainder in the stator, which makes possible a period of substantially continu- , ous, uninterrupted expansion of the ?uid, which is impossible in other known types of radial-?ow turbines because they provide continuous ?owv through unstopped grooves in both rotor,and stator, the ?ow being impeded, confused, or pul-. sated at the crossing points of the open channels. In the present invention the only way in which the ?uid can travel from the inlet to the exhaust is to (a) shift from a channel in one member to a channel in the other ‘at the crossing point, giving one stage of expansion" and (b) shift from the channel in the‘other toa channel in the ?rst member, at the crossing point; giving a sec ond stage of operation, and in so doing the ?uid is caused to produce multi-stage work both by Vimpulse and reaction. ‘ According to the present invention-there-is‘ channel and .entering another at the crossing point. As a result of this, an impulse is imparted, and, in fact, this impulse operates through a ra dius arm which gradually increases as the cross- f ing point progresses outwardly, while an addi--‘ tional amount of energy is abstractedfrcr'n-the elastic ?uid according to the reaction principle} over that part of the rearwardly dischargingIPDF Image | AGE RADIAL FLOW TURBINE
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