US1916870A - Centrifucal bowl - Google Patents

Description

G. J. sTREzYNsKl CENTRFUGAL BOWL July 4, 1933.

Filed June 25, 1931 2 Sheets-Sheet 1 july 4, 1933- G. .1. STREZYNSKI 1,916,870 f CENTRI FUGAL BOWL Filed June 25. 1931 2 Sheets-Sheet 2 fed to the bowl.

- spaces of the liquid Patented duly 4, l933 sra'rs PATT OFFHCE GEGR-TE J. STREZYNSK, OF PGUGH CEEPSIE, NEW YORK, ASSIGNOR T0 THE DE LAVAL SEPILRATOR COlf'lFjIY, OLT NEW YRK, N. Y., A COREORATION OF NEW JERSEY CENTREUGL BOWL .application filed June 25,

My invention relates to bowls for centrifugally separating liquids of diilerent specilic gravities and has for its object the provision of a. bowl that will have less tendency to be clogged by viscous sticky liquids.

ln the operation of centrifugal separators, the lighter of the two constituents when it emerges from the inner edge of the interdisc spaces comes in contact with the outside of the tubular shaft or with the wings that ordinarily project therefrom to support the discs. :if such lighter liquid be of high viscosity, and esaccially if it be of a sticky nature, it will frequently adhere to such shaft or wings and cause plugging of the bowl. rlhis, in some cases, maires continuous operation impossible.

lu my invention the outside diameter of the tubular shaft is made so much smaller than the outlet for the lighter constituent that will be substantially less than the inside diameter of the annulus of such constituent in the bowl and the wings are omitted from the space betwen the discs and the tubular shaft, thereby substantially eliminating all surfaces to which it is possible for the above described viscous and sticky material to adhere, whereby there is no obstruction to the continuous discharge of such material from the bowl.

ln the accompanying drawings, which illustrate a bowl .made in accordance with my invention: Fig. l is a vertical section of the bowl, Fig. 2 a cross-section on the line 2*-53 of Fig. l, and Fig. 3 a perspective view of the tubular shaft.

rlhe bowl shell uhas an opstanding central nave 2') around which is a tubular shaft c through which the mixture to be separated is Between the nave and the tubular shaft is a liquid feed distributor d and at the lower part of the tubular shaft is a pctticoat e having passages 7E communieating, at their iner ends, with the inter-bar feed distributor and at 'their outer ends with the distributing' holes f/ through a series of frusto-conical members 7L, technically called discs, only a few of which are shown, which surround the tubular shaft above its petticoat and divide the liquid be- 1931. Serial No. 546,756i

ing treated into many thin layers. This liquid feed contrivance forms the subjectmatter of another application filed of even date herewith, Seria-l No. 546,757.

The discs 7L, which are spaced from the tubular shaft, are guided by a plurality of vertical bars having their lower ends attached to the petticoat c and their upper ends supported by bars 7' from the upper part of the tubular shaft.

Above the series of discs 7L is a top disc /c which separates the outflowing lighter constituent from the out-flowing heavier constituent in the passages ya under the bowl top m. The top disc is provided with a neck a having therein helices 0 described in my copending application Serial No. 472,24'7, filed August l, 1930. V

rlhe diameter of the neck u is so much grea er than that of the tubular shaft C that the inner surface a of the lighter component will be a substantial distance from the tubular shaft.

ln operation, liquid to be separated is fed into the center' of the bowl. ll/hen it strikes the top of the nave it is spread outward and caught between the bars of the distributor (l, which cause it to rotate with the bowl. Centrifugal force then makes it flow through passages f to the distributing holes g whence it passes into the spaces between the discs 71,. Here centrifugal force causes the heavier constituent to move toward the bowl shell while the lighter constituent moves toward the center where, because it has ample space and nothing to which it can adhere, it flows upward. and discharges from the top of the bowl.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

l. A centrifuge comprising a bowl, a central tubular feed shaft, discs whose inner edges are spaced a substantial distance from the feed shaft and whose outer edges are spaced from the bowl wall, and disc-guidingdevices extending substantially parallel to the axis of the feed shaft and spaced from the feed shaft so as to provide a substantially unobstructed discharge passage for the light constituent.

2. A centrifugal bowl and spaced-apart discs contained therein, said bowl having a substantially unobstructed solids-collection space between its outer wall and the outer edges of the disc and having an annular passage, substantially unobstructed in both axial and circumferential directions, for a light constituent discharged from the spaces between said discs.

3. A centrifuge comprising a bowl, discs contained therein, said bowl having a substantiallyunobstructed solids-collection space adjacent its peripheral wall, and means providing, for the discharging light separating constituent, an annular iow passage substantially devoid of obstructing surfaces to which sticky viscous materials can adhere, and discguiding means engaging thevdiscs adjacent their inner edges but not extending into said flow passage.

4. In a centrifugal bowl, the combination with a central tubular shaft of relatively small external diameter and a nest of'discs having center holes of much greater diameters than that of the tubular shaft, said bowl having a substantially unobstructed solidscollection space adjacent its peripheral wall, of disc-guiding contrivances engaging said discs adjacent said center holes a-nd also spaced a substantial distance from said shaft, thereby providing a substantially unobstructed space surrounding the tubular shaft.

5. In a centrifugal bowl, the combination with a feed device comprising a tubular shaft of relatively small external diameter and a nest of discs having center holes of much larger diameters than that of the tubular shaft, said bowl having a substantially unobstructed solids-collection space adjacent itsr peripheral wall, of disc-guiding bars substantially parallel to the axis of said shaft and spaced from the shaft and supported only at top and bottom by said feed device.

G. In a centrifugal bowl, the combination with a central tubular shaft and discs in the bowl having center holes spaced a substantial distance from said tubular shaft, of vertically extending disc-supporting contrivances also spaced a substantial distance from said tubular shaft, said bowl having a substantially unobstructed solids-collection space adjacent its peripheral wall and having an outlet for the lighter separated constituent so positioned that the inner wall of discharging lighter constituent will be positioned between said contrivances and said shaft.

7. In a centrifugal bowl, the combination with a relatively small diameter tubular shaft and a nest of separating discs having center holes of much greater diameters than the diameter of the tubular shaft, said bowl having a substantially unobstructed solids-collection space adjacent its peripheral wall, of vertically extending disc-guiding bars spaced a substantial distance from said shaft. a top disc having a discharge neck smaller than the diameters of theholes in the other discs but so much greater than the diameter of the tubular shaft that the interior wall of discharging separated lighter liquid will be at a substantial distance from the annular shaft and from the vertically extending bars.

8. In a centrifugal bowl, the combination` with a bowl having a neck for discharge of the lighter separated constituent, of a central tubular shaft, discs in the bowl having center holes. the inside diameters of said neck and holes being substantially greater than the outside diameter of said shaft. said bowl having a substantially unobstructed solids-collection space adjacent its peripheral wall, and discsupporting bars located outside the cylindrical plane of the discharge neck. thereby providing a substantially unobstructed space through which the separated lighter liquid is conveyed from the locus of separation to the discharge neck.

9. In a centrifugal bowl, the combination, with a bowl having a neck for discharge of the lighter separated constituent.y of a central tubular shaft whose external diameter is substantially smaller than the intern al diameter of said neck, discs in the bowl having center holes whose inside diameters are greater than the inside diameter of said neck. said bowl having a substantially unobstructed solids-collection space adjacent its peripheral wall, and disc-supporting bars located outside the cylindrical plane of the discharge neck, thereby providing a substantially unobstructed space through which the lighter separated liquid is conveyed from the locus of separation to the discharge neck.

In testimony of which invention, I have hereunto set my hand, at Poughkeepsie, N. Y., on this eighteenth day of June, 1931.

GEORGE J. STREZYNSKI.

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