US1220811A

US1220811A - Spur-gearing.

Info

Publication number: US1220811A
Application number: US7515916A
Authority: US
Inventors: Karl Alquist
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1916-01-29
Filing date: 1916-01-29
Publication date: 1917-03-27
Anticipated expiration: 1934-03-27

Description

K. ALQUIST. spun GEAmNa.

APPLICATION FILED IAN.29.I9I6.

Patented Mar. 27, 1917.

lo n@ x s i' ,E il I K. ALQUIST.

SPUR GEARING.

APPLICATION FILED 1m29, 19m.

ai. A fauis'r, or

SCHENECTADY, NEW YORK, ASSIGNOR TO COMPANY, A CORPORATION '0F NEW YORK.

application med January sie, 191e. serial No. 75,159. v'

ATo all whom it may-concern.'

Be it known that I, KARL ALQUisT, a sub-v ject of`the King of Sweden, residing at Schenectady, inthe county of Schenectady, State of New York, have invented certain new and useful Improvements in Spur-Gearing, of which the following ils a specification.

The present invention relates to spur'gearing of the double reduction or multiplication type, and vparticularly to such gearing for relatively small supports and' designed to run at relatively small speed reductions.

In my` application, Serial No. 48,424, led September 1, 1915, ll have described and claimed broadly an improved lubricating system for a gearing, which system is'entirelyI within the gear casing so that the gearing is entirely self-contained. Tn such.

. application the invention is shown as applied to a single reduction gearing. )ne of the objects of the present invention is to-provide an improved arrangement of double reduc- -tion gearing in whchthe invention of my above referred to applicationis embodied.

A further object of the invention is to provide an improved arrangement of the gear Wheels in the casing whereby a compact structure is obtained so that the gear casing may be given small dimensions.

For a consideration of what I believe to be novel and my invention, attention is directed to the accompanying specification and the claims appended thereto.

Tn the'accompanying drawing, Figure 1 is a vertical section through a double reduction gearing embodying my invention; Fig.

2 is a section taken on line 2 2, Fig. l, line purpose of illustrating the manner in which such gear wheels are slipped into place.

Referring to the drawings, the gear. oasing is shown as comprising a lower s ection 6 and an upper section 7 suitably joined together by bolts 8. The upper section is provided with an opening 9 to one side thereof, which is closed by a cover plate 10 fastened in place by bolts 11 This cover plate is Specification of Letters Patent. I

Patented Mar; er, iai fr.

` curved as shown, and on its outer side is provided with a suitable number of ribs or fins 112. .On the inner side it isA provided with a series of webs 13 which are preferablyin line vwith the 'ribs orfns 12 as shown in GENERAL ELECTRIC Fig. 3. The purpose of these parts will be pointed out hereinafter.

14indicat`es the high speed pinion. It is of the herringbone type" and comprises two spaced parts 15 and '16 carried by the high speed shaft 17, This shaft is supported in bearings 18 located at the dividing line of the two halves of the casing, the upper half of each bearing being located in a slot in the upper half of the casing formed by of each bearing beinglocated in a slot 20 (Fig. '4) inA the wall19, and the lower half the lower half of the casing.` One end of the shaft 17 projects beyond the casing wall to receive a coupling, and is surrounded by la coveriplate 21, and the vother end is covered by a cover plate 22. 'These cover plates are held in place by suitable bolts 2la and v 22a. 23 indicates the low speed wheel mounted on a shaft 24 supported in bearings 25 also located at the dividing line of the two halves of the casing. One-half of each bearing is located in a slot in the upper half of the casing formed by the wall 27, vand the other half is located in a slot 2'8 in the lower half of the casing.-

(Fig. 4) The one end of shaft 24 projects beyond the casing. to receivet a coupling and is surrounded by a'cover plate 29, and the other end is covered by al cover plate 30. These cover 90.

plates are held in place by suitable boltsl 29a and 30a. The gear wheel 23 isl shown as Ibeing of the elastic or flexible type invented by me and comprises a plurality of laminations or disks suitably fixed on the shaft and slightly spaced apart at their periphery v to permit of slight axial yielding under tooth pressure. The invention is not limited, however, to this type .of gearing. Arranged 'between the pinion- 14 and gear wheel 23 yare the ,intermediate gear wheels-31 and 32 which' itransmit the power from the one to the other. They are mounted on a ooml mon shaft 33, the low speed `intermediate wheel 32 being in two halves which are spaced apart and mesh with the two parts of the pinion 14, and the high speed intermediate wheel 31 being arranged between the two halves of wheel 32 to mesh withthe low speed wheel 23. The wheels 31 are also lois able bolts 3T. In order to get the shaft 33' with the

wheels

31 and 32 thereon into place without requiring that the casing be split at the center line of the intermediate gears I connect the openings 35 with the. slots :28 by means of runways 3S formed by the walls 39.' This is best shown in Figs. 4 and 5. 'hen the gearing is being assem` bled the

intermediate gear wheels

31 and 32 with their shaft 33 are first put into place by sliding the ends of the shaft down the runways 3S. This is illustrated in dotted lines in Figs. 4 and 5. The two bearings 34 are then slipped into the openings 35 and over the ends of the shaft- 33. The bearings 34 are provided witli end flanges 4() which are located between the cover plates36 and the gear casing, the bolts 3T extending through them so as to anchor the bearings firmly iii-position. Located inside the casing beneath the opening 9 and above and to one side of the gear wheels is a lubricant containing reservoir 41. This constitutes a storage reservoir for lubricant which is used to lnbricate the bearings and the teeth of the gear wheels. It is preferably rectangular and has its wall 4'2 shaped, as shown. to accommodate the

gear wheels

14 and 23. Extending upcat -one side of the reservoir 41 is a rectangular passage 43 formed by the walls 42 and connecting the lower portion of the gear casing with the reservoir. The passage 43 extends from the bottom of the reservoir to a point adjacent the top thereof. The passage 43 is of a length to extend to each side of the two sections of intermediate gear wheel 31 and is located over the left-hand side of such 4wheel (Figs- 1 and 3).

of the casing 6 is provided with a curved wall 44 having two grooves 45 therein, as best shown inFigs. 1 and 3. This curved wall is set up above the bottom of the lower half oflthe casing and extends well around the gear wheel 31' so that to one .side of it, is formed a lubricant containing well 46. The curved wall 44 conforms to the curvature of the gear wheel 31 and the two parts of such gear wheel run in the grooves 45, the grooves being of such size as to fit fairly close to the wheel. The lubricant containing well 46 is connected with each of the grooves45 by small passages 47. T he reservoir 41 is connected to the various 'bearwhich lubricant may be carried to them. All

these passages .do not show in the views of The lower half the drawing but the general arrangement of all will be readily understood from those which do show. 4S (Figs. 1 and 3) indicates passages leading -to the bearings of the low speed wheel `23. 52 are passages through which lubricant from the reservoir 41 passes to lubricate the teeth of the

meshing gear wheels

23 and 32. Lubricant from the reservoir drips through these passages directly onto the teeth of gear wheel 23.

In assembling the gearing the

intermediate gear wheels

31 and 32 are first put int-o place as already explained. The lower halves of the bearing members 18, and Q5 are then fitted into the slots 20 and Q8,

in the lower half 6 of the casing` and shafts 1T and `24 which carry pinion 14 and low speedgear wheel :23 mounted therein. after which the uppervhalf of the casing with the upper halves of the bearings in place thereon is put into place. V

In operation a suitable amount of oil is filled into the lower half of the gear casing; i. e., the well 46, and into t-he reservoir 41, the levels which it assumes in the well and reservoir not being material, for if the gear is standing idle, all, -or substantially all. of the lubricant will run through to the well 46. The gearing revolves so that the gear wheel 31 moves in the direction indicated by t-he arrow. This wheel acts as apump to pump lubricant from the grooves 45 up through the passage 43 into the reservoir 41 from which it is fed through the passages 4S, etc., to the bearings, and also through the passages 52 to lubricate the teeth of gear wheels 23 and 3'2. When the gearing is started it will quickly pump lubricant from the grooves 45 up into the res- "ervoir 41, as at such time these grooves will be Hooded with lubricant owing to the level in the chamber or well 46 being fairly high. The passages 47 will be of such size that they will easily feed the return lubricant from the well'46 to the grooves 45. To do this it will only be necessary that the tips of the teeth engage with the lubricant. TheV arrangement of the grooved wall 44 having the grooves 45 in which the teeth run and to which lubricant is fed from the well 46 insures the proper direction of the lubricant during the pumping operation, as otherwise the angleof the teeth would tend to force the lubricant in an axial direction. The curved wall 44 acts in a way as a pump casing` guiding the lubricant.

he lubricant pumped by the gear wheel and discharged through passage 43 will be in t-he form of a fine spray and fog, and it is desirable to condense this and separate the air out of it, and at the same time to cool it. Itis for these purposes that the webs 13 are provided. The spray and fo in the passage 43 is thrown with considerab e force against the top of the cover 10 between the webs 13.

. toward the right in Fig. 1, Vthe drops of l-5V f i :madera This tends to condense .the fog and separate it and the spray out -from the air, a goodly portion of it clinging to the cover and to the webs. 13, which also act in the capacity of surface condensers to further condense andy separate out the lubricant. Owing to the curved s hape of the cover the spray and fog and the drops of lubricant will tend to flow lubricant droppinginto the reservoir 41. When the spray and fog strikes the cover 10 its direction` is changed before `being forced to flow down between the webs 13. rlhis causes the air to .How under the-lower edges ofthe webs 13 to the casing, separatingoutthe air in a very satisfactory manner.` At thesame time the Webs absorb a large amount of heat from the' lubricantwhich heat is carried to the outside of the casing l'wall anddissipated. The ribs or fins l2 are for the purpose of assisting in this by providing additional radiating surface. The arrangement thus functions as a cooler and condenser for the lubricant and also as an air separator. 1 By this arrangement vli provide for lubricating all the bearings and all the gear teeth without a separate pump.

ln running only the tips of the teeth of the gear wheel 31 engage the lubricantv and this involves practically no loss; and at high speeds the windage' is practically-suflicient for Pumping the oil. il;

As will. be clear, my improved arrangement provides a very compact gearing by reason of the arrangement of the gear shafts relative to each other and the arrangement Aof the gear wheels thereon. VThere is practically no wasted space within the gear casing. .At the same time itis necessaryv to pro,-

vide only one split in thecasing inl order to mount all the gears in place. f lin accordance with the provisions of the v patent statutes, ll have described the principle of operation of my invention, together l paratus shown is only illustrative, the invention can be with the'apparatus which I now consider to representthe best embodiment thereof; but

l desire tohave it understood that the apand that carried. out by other means.- i

What .li claim as new and desire-tovselcure by Letters Patent of the United States, is l. r1he combinationlin a double reduction gearing, rof a casing divided into'upper and lower sections, a high speed pinion and-ay lowv speed gear wl1eel, separate shaftstherefor, said shafts being journaled inthe cas.- f

ing at 'the dividing line between thecasing sections, a shaft journaled .i in openings formedy in the lower section of the casing at a point below the lfirst named shafts, and

gear wheels mounted on the last named shaft which mesh with the high speed pinion and the low speed wheel.

2. 'llhe combination in a gearing, of a -with their centers casing divided into upper and lower sec-v tions, said sections having slots at the dividing line of the casing adapted to receive bearings,- the lower half of the casing being provided with openings located below the Vslots also adapted to receive bearings, and

with runways connecting the openings with certain of said slots whereby a shaft may be slid down said .runways to the openings and have bearings slipped over its ends and into said openings.

3. The combination in va double reduction gearing, of a casing dividedinto'upper and lower sections, said sections having slots at the dividing line of the casing, said lower section being also provided with openings located `below the slots, and with runways connecting said openings with certain of the slots, bearings in said slots, shafts in said.

bearings, a high speed pinion and a low speed wheelmounted on 'said shafts, bearings in'said openings, a shaft in said bearings, and gear wheels mounted on said shaft pinion and low speed which mesh with the wheel.

4. yThe combination in a double reduction gearing, of v.a casing, a shaft therein, a high speed pinion mounted on saidy shaft and formed inltwo sections which are spaced apart, a second shaft journaled in the casing, a low speed wheel mounted on itwhich is of a width equal to the space between the two sections of the pinion, a third shaft journaled in the casing, an intermediate high speed wheel mounted on it which va low speed gear wheel mounted therein with their centers in the same horizontal' plane, intermediate gear wheels mounted in said casing below such plane, which transmit power betweenthe pinion and low speed wheel, means forming` a` lubricant containing reservoir located in the upper portiony of the casing, a lubricant containing well being formed in the lower portion 4of the casing fromv which lubricantis pumped by one of the intermediate gear wheels to the reser-' voir, and means for conveying lubricant from thereservoir to lubricate the gearing.

6. rEhe combination a double reduction gearing, of a casing, a high speed pinion and a low speed gearwheel mounted therein inV the same horizontal plane, intermediate gear wheels mounted in said casing below such lane which transmit power between the pinion and low speed itt WW meshes with thelowspeed wheel, and an litt Miti

Mtl

wheel, said casing being formed with a groove 1n which one of said wheels runs,

means forming a lubricant containing reservoir located in the upper portion of the casing, the casing having a wall forming a passage which extends from the lower portion thereof to said reservoir, a lubricant containing well being formed in the lower portion of the casing. and also a pasage through which lubricant is fed by gravity from the well to said groove, said gear wheel which runs in the groove acting to pulnp lubricant from the groove up through said tirst named passage to the reservoir, and means for conveying lubricant from the reservoir to lubricate the gearing.

'i'. The combination in a double reduction gearing` of a casing. a shaft therein, a high speed pinion mounted on said shaft and formed in two sections which are spaced apart, a second shaft journaled in the casing, a low speed wheel mounted on it which is of a width equal to the space between the two sect-ions of the pinion. a third shaft journaled in the casing. -an intermediate high speed wheel mounted on it which meshes with the lowv speed wheel, an intermediate low speed wheel also mounted on the third shaft and formed in two sections one on each side of the intermediate high speed wheel` said two sections extending on each side of the low speed wheel and meshing with the sections of the high speed pinion, and said casing being formed with two grooves in which said two sections run, means forming a lubricant containing reservoir located in the upper portion of the casing*` the casing having a wall forming a passage which extends from the lower portion thereof to said reservoir. a lubricant containing well being formed in the lower portion of the casing. and also a passage Ithrough which lubricant is fed b v gravity from the well to said groove, said gear wheel sections which run in the grooves acting to pump lubricant from the grooves up through said first named passage to the reservoir. and means for conveying lubricant. from the reservoir to lubricate, the gearing.

In witness whereof, I have hereunto Set in v hand this' Qqth day of January, 1916.

i KARL ALQUIsT.