COMBINED RADIAL AND AXIAL FLOW MULTISTAGE TURBINE

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COMBINED RADIAL AND AXIAL FLOW MULTISTAGE TURBINE ( combined-radial-and-axial-flow-multistage-turbine )

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2,592,227 78 circular.-cross section of increasing width and depth in the direction of axial ?ow, blades ar ranged within said grooves inclined tangentially and axially, so that a.line proceeding along the blade towards the axis of the cylindrical surface isinclined with respect to a radial plane passing through said axis and a line, running along the blade in an axial, direction is inclined with re spcct .to the elements of the cylinder, a stator with. a cylindrical inner surface provided with a 10 the number of'blades in the adjacent circum series of juxtaposed radially extending circum ferentialgrooves of substantially semi-circular cross section, of a width and depth increasing in the direction of ?ow, acting as flow direction re versing chambers, the grooves in the rotor and 15 stator being staggered and a flow dividing cyl inder arranged between the cylindrical surfaces of the stator and;the rotor, provided with inlet and outlet openings of an increased axial Width, arranged so as to coincide with stator and rotor grooves respectively, the width of each opening not exceeding one-half of the axial width of the stator and rotor groove covered by the said opening. 3;A multistageturbineforoperationwithelas 25 ticfluids passing through the turbine in a com binedaxial and radial ?ow, comprising a rotor with a,cylindrical outer surface, provided with a series.of juxtaposed radially extending circum ferential‘grooves‘of substantially semi-circular cross,section,of increasing width and depth in thedirection of axial ?ow, blades arranged with in said grooves inclined tangentially and axially, so that a line proceeding along the blade-to wards' the axis of the cylindrical surface is in clined with respect to a radial plane passing through said axis and a line running along the blade in an axial direction is inclined with re spect to the elements of the cylinder, a stator with a cylindrical inner surface provided with a 40 series of juxtaposed radially extending circum ferential grooves of substantially semi-circular cross section, of a width and depth increasing in the direction of ?ow, acting as flow direction reversing chambers, the grooves in the rotor and 45 stator being staggered and a flow dividing cylin drical member interposed between the cylindrical surfaces of the stator and rotor, said member beingsubdividedintoseparateaxiallyspacedcir ferential rotor groove, so as to subdivide the ?uid emerging from a flow reversing stator groove into a number of jets equal to the number of blades in the rotor groove. 35 Number 635,919 , 762,449 860,573 1,003,203 1,077,300 1,139,696 1,164,091 1,315,230 1,418,444 1,421,087 1,442,876 1,676,806 1,828,782 1,864,742 Number 23,713 Name Date Curtis ______________ Oct. 31, 1899 Sturgeon __________ June 14, 1904 Sayers ____________ July 16, 1907 Rearick ____________ Sept. 12, 1911 Rearick _____________ Nov. 4, 1913 Maxwell_________,___May 18,1915 Herz______________Dec.14,1915 Mallory ___ ________ __ Sept. 9, 1919 Josephs _____________ June v6,1922 Johnson __________ June 27, 1922 Hartman __________ Jan. 23, 1923 Smalley ____________ July 10, 1928 Morton _____________ Oct. 27, 1931 Koch ______________ June 28, 1932 FOREIGN PATENTS‘ \\Country Date Great Britain ________ NOV. 2, 1903 cumferential zones of increasing axial width, a continuous series of ports being provided in said member along said zones, and said member being arranged between the stator and the rotor so that the zones coincide with the overlapping por tions of the-staggered circumferential grooves in the stator and the rotor, adjacent zones being provided with inlet and outlet openings respec tively, the numberof the former being equal to 4.VAmultistageturbineforoperationwithelas tic fluids as'claimed in claim 1 wherein the inlet openings are provided with radially inclined walls which are also inclined ‘at an angle to.the ad jacent portionof the blade. 5. .The combination of claim 1 including means for generating and'introducing steam into the ?rststageoftheturbine. CLIFTON YEOMANS. REFERENCES CITED The following references are of record- in the ?le of this patent: UNITED STATES PATENTS

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