US1228493A - Reduction-gearing. - Google Patents

Description

L. L. SMITH. neoucnou GEARING; APPLICATION FILED AFR. I2. 1913- I 1,228,493. Patented June 5,1917.

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HIS ATTORNE Y IN FACT.

L. 'L.' SMITH.

REDUCTION GEARING.

L.-L. SMITH.

REDUCTION, BEARING.

APPLICATIO FILED APR- |2 I913- v 1,228,493. Patented June 5, 1917. v

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L.L SMITH REDUCTION GEARING ot' Edgtnvood. in the and Stateio't' lenns \lvama, have made a new UNITED STATES PATENT OFFICE.

LOUIS Ii. SMITH, OF EDGEWOOD, IENNSYLVANIA. ASSIGNOR. BY MESNE ASSIGNMENTS,.

TO THE WESTINGHOUSE GEAR AND DYNAMOMETER COMPANY. OF PITTSBURGH, YENNSYLVALNIA, A CORPORATION OF PENNSYLVANIA.

BEDUCTION-GEARIN G.

To all whom it may concern:

Be it known that l, Loris TA. Surrn, a citizen of the United States. and a resident county ot Allegheny and useful Invention in littllltitiolktiezllllig. of which the following is a speeilieation.

"This invention relates to reduction gearing and as an objeet has the produetion ol' gearing for transmitting power from high speed motors. sueh as turbines, to apparatus to be run at lower speeds, suel1. t'or instanee v as the propeller shafts of ships. di'reet eurrent generators. and eentril'ugal pumps.

A. further objeet of this invention is the production ot' relatively cheap and simple means in reductiongearing for permitting automatie adjustment and distribution ol the tooth pressures during the transmission of power. p

A still further object is the produetion in reduetion-ge u'ingof simple and relatively cheap nit-ans for taking care oi slight mis alinement between the shafts of the eool'ierating gearing members making up the. rednotion gearing.

These, as well as other objects which will readily appear to those skilled in this art, I attain by the device described in the speeili cation and illustrated in the drawings aecoml'ianying the same and forming a part of this application. and throughout whieh like elen'ients are denoted by like eharaeters.

George \V. l\l(l\'.lll. and John H. Maeal pine jointly have in vented.several reduction gearing deviees for obtaining a utomatie dis tribution and adjustment of tooth pressures in reduction gearing. (ieorge \Vestiughouse has made a number of inventions relating to retiluetitn'i gearing and he has in a number of cases will whirh 'I am familiar supported- Specification of Letters Patent.

Application filed April 12, 1913.

the shafts of steam Seriat No. 760,762.

For the. purpose. of attaining cheaply aml tilHll the objeets sought by aml Mat-alpine and said \Vestmghouse. I

said l\lelville" Patented Jnne fi, 1911' I utilize bearings similar to those disclosed b vthe said larsons'lor one of the gears of a reduetion gearing apparatus. .\l invention broadly eonsists in journaling the pinion member of spur gearing in bearings emplo ing in their make-up a number of oil lilms so maintained that the pinion member praetlt.'tlll floats and is tree to move within the neeessariv limits and in the preferred forms the movements ol' the pinion duo to its floating are limited to movements in the -plane perla-iidieular to the plane ineluding the axes of the gear aml pinion and which ineludes the axis of the pinion, and the pinion is mountedso as to be capable of adjusted move'n'ient in the plane. including the l axes of the gear and pinion.

For the purpose of tull v illustrating my invention but. with no idea ot limiting the same to certain speeiliodetails.1 have shown the invention as applied to spur gearing in \vhieh the gear aml pinion members are pro\'ided with reversel) arranged spiral teeth, as in the ordinary form of herringbone gearing.

' 1n the drawings:

Figure l is a plan view ol" a reduction gearing deviee, e.lubod \'ing this invention and the eellular bearings 'l'or supporting the,

pinion member seet ion;

Fig. 2 is a transverse sectional view ot' the device shown in Fig. l, on the line 2--2 of Fig. 1.; i

-Fig. 3 is a detail longitudinal seetion ol" are shown in longitudinal one of the cellularbearings shown in Fig.

1 and o 4 saidbearing;

' Fig, is a tragmentary view partially in plan and partially in soetion of a modified,

i'orm oi this invention;

Fig. (3 is a view partially in elevation and partially in longitudinal seetion of a. modilied form of this invention amlillustrates means for supplying the oil for the oil films;

Fig. 7 is a transverse sectional view of 'tlio i'ornrot' eellitlar bearing shown in Fig. t' 'g' and Fig. IQ is a view partiallyin elevationantl partially in section of a special tenant tois a transverse seetional view ot shaft 17 duetion gearing to which this invention has been applied. the special form of gearing having been invented by (leorg Dulling of Cologne. t'lermalrv.

In the deviceillustrated in Figs. 1 to inclusive :1 gear member ltleonsisting of two sets ol' gear teeth ll antlli is mounted on a shaft 13 adapted to be connected to the apparatus to be run at a reduced speed. such as a propeller shaft. :1 direct current generator, or a eentril'ugal pump. flheshat'tv 12 is jonrimled within suitable l arings' ll and .15 carried in a casing member lt'.

i\ pinion, member whi -ll ronsists ol a shall 17 provided with two sets of oppositely arranged spiral teeth 18 and lit, meshes with the gear inemlau', hesha i t .17 is journaled within cellular bearings 20, 21, and 7221'. Cat-hot these hearings is prel erably made up ol a'eentral bearing member 23 in whiehthe shatt lT turns or runs. The central bearing member 22; is provided with a. central flanged portion 24, and end collars 25 and 2G threaded onto the central member 2 Met ween the eentral flange 2+ andieach of the .end rings 25 and it; are a number (preferably three. 2. 2s. and 21)) of bushes or tubes one titting over theoother with slight freedom of lit andrlosely fitting between the central flange 2% and-the end rings. lhese hashes or sleeves are provided with drilled oil duets 30.

The cellular bearing: tits within an outer bearing shell 31 with slight freedom of lit and the outer surface of theshell 31 at its center is formed in the nature of a sphere at 32 and this portion rests within a cylindrical 1 irtion oi the bearing shell 34 which, in turn, is bolted as at 35 to a base frame 16. e

In order to independently adjust bearings 20, 21, and 22 so as to adjust shaft 17 with relation to shaft 13, adjusting struts 40, 41, and 42 are utilized and these pass through openings-formed for that purpose in the pinion frame and bear against central flange 24 of the bearingtubes 23 and are adjustable by means of bolts 43.

Besides serving as means for adjusting with relation to shaft 13, these struts limit the movements of the pinion member allowed by the cellular hearings to movements in the plane perpendicular to the plane including the axes of the gear and pinion (and which includes the axis of the plmon). A

011 under pressure derived from a sultable source must be pumped or forced into the bearings and for this purpose I provide an inlet pipe 50. The oil entering through said pi e will be forced in between the nested bus iings through the oil ducts in the bushings, themselves and through the oil duets 51 drilled in the outer shell 31. The oil between the nest d bushings offers great resistance to moveu'ients of the tubes or bushes relatively-to each. other due to the lrvdrai'ilie and capillary resistance of the oil between. the bushings and while movemeat ot the pinion member istpermittcd in the plane .perpentlicular. to theplane ineludmg the axes of the gear and pinion and which includes the axis of the pinion, stilt ll is so resisted that a distribution and ad- .plstment' ot the tooth pressures encountered duringthe operation of the gearing will be aut'omat icallv obtained.

lirFig. 5 cellular bearings substantially the same as those .shown by said ll arsons in his said patent are shown and in these forms no means are 1 th p e p pen pinion to movement dicular to the ,plane including the axes'of the gear and pinion and whlch includes the axis of the pinion, but free movements between certain limits are allowed. In Figs. 0 and T, ho\ ve\ier, the,shaft 17? is journaled within a split beari gmade up of halves 18 and l9. Above and below the bearing a number of leaves or-plates ofsuitable shown for limiting the movements of the v metal are located. A hearing box 30 sur-; H

rounds the bearing member and-the, leaves and. is formed so that the bearing member snugly fits the sides, thereofwhile freedom is allowed above and below. the leaves or films for slight relative movement therebe-r.

tween. In the s1'Jacefor allow in-gsuch movement Oll will be torcedundenpressure and the shaft will, bezfloated but'restramed 11] its 'movements by the sides of thebearing box to the plane heretofore. described.

In accordance with the provisions of the patent 'statutes I: have described .tlieprinciple of operation of. my .invenlion together with the device which I now consider to represent the best embodiment thereof, but I desire to have it understood that the de vice shown is only illustrative and that the invention can be carried out in other ways.

\Vhat I claim is:

1. A reduction gearing comprising intermeshing gears, supporting means for one'of said gears for allowing relative angular motion between the shafts of the gears and- :in'g a. stationary support for the angularly liquid 0 said-hlms.

mam;

movable gear, bearing sleeves in which the angu-larl'y movable gear is ournaled, means for formin a-pluralityo :li'iuid films lietween each supporting means, and means for. delivering 3-. A i", ductioii gearing"comprising in'termeshing gears, in com porting means for one of the gears, permitting relative angular 1 motion; between the longitudinal axes of the gears, and coinprising bearings "for the shaftof the angularly movable gear, ii' eai s fo'rin'ing'a part of ci'ichliearin for segregating a plurality of relatively t iin liquid films which yieldingl v support the shaft, and means for delivering liquid undoipressure to the said films."

-;l. A ltdll CtlUll gearing comprising internieshing gears, supporting means for one of the gears constructed to allon' relative angular motion lit-tween the axes of the shafts 'ofthe gears, and comprising cellular lwa rings spaced alongthe shaft of theangularly movable gear, means for delivering liquid under pressure to the hearings, and means for limiting-themovement of the shaft to a planesulistantiallvper wndicular tir-thc plane defined liy tllllsnt ll ll'lfl positions of the invesof the gears.

.-\-ieiluetion gearing comprising interinaahiag gears, supporting means of the gears constructed to perlnit'relqitive angular motion between the axes et the gears and coin lsing cellular. liearings'for the shaft of v e angular-1y niovalilefgear, means for delivering fluid-under iressure to the bearings ineiinsfor liinitin t as angular motion of the anfinlarly mov i le gcarto a y perpendicular to the plane anbstantia aring 'sleeveand t ie stationar away from t ie other gear.

.in'ealiing gears, supporting means ination with su p prising cellular bearings liquid formed or one Witnesses:

[plane defined by t ienorinal positions of the axes ofthe gears,

and means for adj ustin the aiigularl movable gear toward an 6. A reduction gearing comprising inter- Or one of said gears, constructed to allow relative I angular motion-between the gears and co n-. spaced along the shaft of the gear, and'ineans ioradniittingr liquid under pressure to said hearings.

i. A reduction gearing comprising nterineshing gears, hearings spaced along the shaft of oneof said gears, each bearing comprising concentric sleeves surrounding the shaft oi: the gear aiidl aviiig ducts for therein, and means for del nfll'lllg liquid underpiessure to the ducts ()f-Slild sleeve S. A redu'ctionfgearing coniprisin interincsliiiigrgears, in combination \vi h supporting means for oneof the gears, permitting relative angular motion between the gears, and coin rising cellular bearings s mead along the s afto'fthe angularly mova dc gear,each bea 'ing comprismg concentrjic sleeves surroundin the; gear shaft, :1 bearing shell" 'snrrou ng, the ":concentric sleeves and providedwvi th' 'a's h'roidalouter :face' having its maximum mediate its ends, and a lieari' aiming said shell and engaging the outer iaineter interhousing ins ill eroidal facethereof; a

n testimony iwliereofal have hummer. 'sl'ibscribedimy name this-Bthdaypf April, 7,5

LOUIS L. SMITH;

' Ann's

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