US872266A - Fob shafts of hotab - Google Patents

Description

thescrews 7 or otherwise and has two UNITE STATES PATENT v OFFICE.

WILLIAM EVERETT VER'PLANCK, SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

PAbxrifG non snsr'rsgor ROTARY smut-Engines.

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Speciflcation'of Letters Patent. 7 I Application filed ilugustf'l' 190s. SerialN o.273.002.

-I'atente'd Dec; 3, 1907.

- To all whom it may concern:

Be it known that 1, WILLIAM EVERETT VER PLANCK, acitizen of the United States, residing at. Swampscott, county of Essex,

State of Massachusetts, have invented certain new and useful Improvements in Packings for Shafts of Rotary Steam-Engines, of which the following is a specification.

- This invention relates to packing for mak- I ing a steam tight joint where theshaft of a rotary steam engine passes out through the wall ofthe'casing.

\ The object of the invention is to provide an efficient and durable device which will automatically take up the wear of its parts and will thus at all times eflectually prevent the escape of steam.

'- The invention is es ecially applicable to i the shafts of steam tur ines, and for the sake 2 of, perspicuity it will be described in that,

connection. j I It comprises two or more rings each composed of segments, one ring breaking joints with the other. The joints'between the seg- 2 ments in one ring are on longitudinal planes parallel with the shaft, while the joints in the Z other ring are on radial planes. The segments are retained in place by segmental holders, and springs are provided to press the rin slen thwisea ainst astationa surface,

5 g g an tive view ofv one of the segments of t e outer ring; Fig. 4 is a perspective view of a segment of the inner ring; Fig. 5 is a perspective view of a set of rin s, the holders being partly broken away; an Fig. 6 is' a cross section 46 showing a modification.

The turbine illustrated has a casing 1 through which passes a shaft 2 suitably journaled in a pillow block 3 and carrying the bucketwheel 4. The casing has an annular -neck 5 concentric with the shaft and faced offto receive a collar 6 which is secured by .allel inwardly projecting flanges .8. he j s ace between the neck 5 and the shaft forms chamber for the first or innerset of packing the s rings, while the annular space betweenv the two fla'nges 8 forms a chamber for the outer set. That portion of the shaft inside these chambers is turned smooth and cylindrical, so as to make a close fit with the packing rings which are composed preferably of carbon or a carbonaceous substance, and are made in segments, preferably three in number. Therings have fiat parallel faces, and

the outer ring 9 fits against the end of its chamber, that is, against the flange 8. The

.ends of the segments-are rabbeted together,

the meeting surfaceslO of the joints being parallel with the shaft. The segments are cut a little short to leave room for contraction of I the ring as it wears awayon the inside. The

inner ring 11 is also'composed of segments,

preferably three in number, arranged to reak joints with the ringQ. The ends of these segments are rabbeted together, but

the meeting surfaces 12 are radial to the shaft.

The two rings lie closely together and are inclosed in'metallic hol ers13 which are inade in segments and have flanges 14 extending inwardly over the inner face of the inner ring. V The holders extend nearly to the flanges 8,- so as to cover the joints as completely as possible. The holders are clamped upon't o ring by suitable means, such as the garter springs 15 shown in Figs.

1 and 2, or' the fiat two-armed s rings 16 shown in- Fig. 6 .8 rings are aiso interposed between the ho ders and a stationary portion of the casing; such as the flat s rings 17 secured to each segment of the older and abutting against the flange 8 or the fiat ring 18 secured to the casing at the base of the neck 5.

corresponding groove or notch in the ed e of the rings, and prevents them from wor 'ng around into a position where the joints would register; On the inside of the flange 8 are lugs 20 which engage with the holders T60 and prevent the rings from revolvin with aft. The springs 17 simply ho d the rings'9 up to the flanges 8, as the steam which has free access to the inner of the two chambers will force the inner ring tightly against the flange, whilethe outer ring Wil a o be forcedagainst its abutting flange by the steam that eaks past the inner ring.

It is evident Qthat no steam can pass through the joints of the ring 11 in a longitudinal direction, but it could get throu h in a radial direction between the ends 0 the segments This is prevented by the holders which completely cover the joints in the ring 11. The steam cannot pass through the joints of the ring 9 in a radial direction, but

it could get through in a longitudinal direc-' together.

2. 'A packing fora rotating shaft comprising two segmental rings'lying side by side and arranged to break joints, the abutting ends of the segments being rabbeted toget er, the meeting surfaces 0 the joints in one ring being parallel with the shaft and-in the other ring radial thereto; 4

v 3. A packing for a rotating shaft comprising two segmental rings arranged to break joints, the abutting ends of the seg-' ments being rabbete'd together, and segmental metallic holders overlapping the joints.

4. A packing for a rotating shaft corn- .prising two segmental rings arranged to break joints, the abuttingv ends of the segments being rabbetetogether, and se mental metallic holders bverlapping the faxes, and havin fiangeseXtending-inwardly ver the ice 0' one ring.

5. A packing for a rotating shaft cor pris ing two segmental rings lying side b side and arranged to break joints, the abutting ends of the segments being rabbeted to--- 40 gether, a stationary abutment for said rings, springs urging 'them toward said abutment,

and circumferential springs forcom ressing them upon the shaft and taking up t e wear.

' 6. A packing fora rotating shaft comprising two segmental rings arranged to break joints, the abuttingends of the segmentsbe'ipg rabbeted together, and segmental metal ic holders overlapping the joints and having ribs engaging with grooves in said rings. a

7. The combination with a shait, of a stationary flange having one or more lugs, two

carbon packing rln s made in segments fitting said'shaft and reaking joints, and metalhc holders for said rin s restrained from v rotation by said lugs andli aving ribs engagsaid rings.

Tn witness whereof I have hereunto set my :hand this thirtieth day of June, 1905.

WILLIAM EVERETT VER PLANGK. Witnesses:

JoHN ArMcManns, Jr.,

V HENRY O. WESTENDARP.-

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