US1797406A - Sheave crown block - Google Patents

Description

March 24, 1931.

W. W. ERLEWINE SHEAVE CROWN BLOCK Filed March 8, 1928 3 Sheets-Sheet l Z6- Inventor. W61 Her 715E z'lewz'ne r @P M \floraggys.

March 24, 1931.- w. w. ERLEWINE 1,797,406

SHEAVEZ' CROWN BLOCK Filed March 8, 1928 3 Sheets-Sheet 2 Inven toz.

Irene,

. March 24, 1931. w w wm 1,797,406

SHEAVE CROWN BLOCK Filed March 8, 1928 3 Sheets-Sheet 3 InVezgz az'; "(liter WEz'ZeWzn e/. W W 5,5,2

Patented Mar. 24, 1931 sHE i E oRowN: n fioek 7 Application file d tie-1 611"- 8,

Theobjeet of rthislinx'jr'erition is 'in sr-floy the" Construction of sheave crown blojcks adapted particularly for fis'e co'liilectioii with oil ell" operation so that e relatively lti'rge'fiumber of sheaves cah' b' e'lnploy'ea for use in connection with the very medern; oil 'Well {zind' th'zit they maybe moil'ntd compactly so that ,the angles of thelil le'e ru'nni'ng ffom thei'trei-v eling block over the sheaves will not be'so g eat 'a sf to eau'sethe' lines tofesczipe froIhthe's'heaVe's i Ani ziclcliti'oriztl object is' to mount the sheaves iii a series on a single straight rigid axle ahd W'itli'the bearing or the entire seriesarra'figecl so that they may be tightened up mid ztcljustecl-ohseid axle by a sing-1e means, Whereby the sheaves may be niohhte'cl 5nd maim, tallied in their proper relative positions and will, not wobble'and their hearings will last a relatively long time.

The 1111 nature of the i'fiventio iwfnt e hnder'tood from the aecoiripaiiyinQdraw ings andfollowihg detailed description and ol'aiiiis, l I

IIl th6 drawings: l o I h Fig. 1 iS' an elevationof the'sheaxfe orown block, traveling block and eables 'fcoiihecting them with all but one Series of sheztves be ing" omitted. Fig.2 is' a plan View of the crow'nblock with a: full set of sheeyeshmfint ed thereon: Fig; 3 is asicleeleydtiorrof the uppe i end of 2i derrick and the erow iiblock eho'wnl in Fig.- 2, the lowerfportion of the derrick being. broken away'f Fig. 41 1s 570E121? trztl vertical section through lth e series of shezw elshiid their mountin on the of F 3',v but one; larger setleg ,F'ig. 5 is a seo'tioli similarto that ofFigl 4; bi1t of an'- otherfdzin. Fig. 6 is'a'n end ,elevatioiiof the righth'and end of a; portion of Fig 4. V

'Thereji'sshowfi in Fig; 3 the V011 wen: 161 1 rick 10 of conim'ohjtypejwith thefsheaiie" ci' 'o wri blo'okmotl ite'cl, tliere oiie, Sti-idkrovs'zh bleak is lfdrmedb f afseries of I-beams 1-1, 12', 13

and 14 pdrellel' with eaeh other" and 'ofthe smile dimensidns preferably, eziefepting they maywaryz in lehgth, a 'showifin Fig.2; 1 Thiis, as there shown, the beams 11 are side beams and arerelati'vely long The beams 12 Mid 13m somewhatshorter antl't-he intermediate 192 "steer m. semis? b t eiwilil" e; at-wei i they are"eo'rii'ieeted withv intermediate cross travelli igj blo'ek thehce (war the sheaves 22, as' slmwn .ijri 1, ind finally om? th t av llin b ck 2' Q' t e b.1111 lin e sheave 20to zi's'alridreel, n 0t shown.

I is imp r' n iflwtt r of pu 'yszz be mounted compactly zi ndes elo'sefio each other as possiblefs'o a's to'lfiihimi'ze the angle betw'eenlth'emfzind the 'line25 that runs over them to and from the trlveliiig' block, This as b c m eimu'ch iioreiinpo'rtaht in view f the very deep oilwellsf that zilfeb eihg drilled in reeelit" time ahd whioh require aimueh t longer lihe' and-va la'rger nilfhbe'r of sheaves" 22 thaii shallow Wells, andt s'inee there isonly one traveling block','a r1 iherezi sein npmber of sheaves increases the angle between the sheayeg :incl the line Q SQQS Oth' tif the Sheaves are not very c oinpaetly nolintd the" lines will 7 esjea'pe'from the sheayes' and ca'luse considerabletrouble; Withthe a angem nt vherein set forth for motinting' hthjes e slieeves 22 We zire enabled to ount the' szt m'e humbe'rof shea es. almost twice as los e together as in r the" crown. block moufl'iti igs heretofore emaxle on which it is mounted.

between the pairs of I-beams there would be no sheave in the same'alinement. Here there is a sheave beside every I-bearn and all the sheaves 1n the series are mounted on one axle.

I The axle 23 shown in Fig. 4 is of varying shoulders 30,31, 32, 33, 34*and35, and the portion on the shaft between each pair of shoulders is of less diameter than-tli'e -pre ceding portion to the left. Consequently the shaft is stepped from end to endand' it furnishes-portions of difierent diametersbetweenthe pairs of shoulders and on each of which portions a sheave is mounted. Y This requires the sheave's'to have internal bores and roller bearing constructions ofc varying diameters, the diameters growing less and less from left to right in 4. 5

'Each sheave is provided with a central bearing construction 45 having a width'abo'ut one-half'of the lengthof the portion of the The roller bearing on, the left hand sheave is set up snugly against the left hand shoulder 30. At the right of the roller bearing, construction of each sheave there is a sleeve 37. loosely surrounding the portion of the axle on'which the sheave at the left of it'is mounted, The

width of'the axle portion of such sheave and I of the sleeve 37 adjacent thereto is as Sl1OV11, slightly greater than the length of the portion ofthe axle on which they are mounted. The successive sheaves to the. right have their roller bearing constructionsheld against the sleeves 37 at the left thereof and that arrangement leaves clearance spaces 38 which, allow the parts ofthe mechanism to be tightened or taken up to allow for wear. I t

' The bearings of said sheaves are held in place and said wear is taken up by a nut 138 on the threaded small end of the, axle at the 140, in the reduced outer end of the nut.

Therefore said sin lemeans namel the nut 138, takes up the wear of the. bearings of all the sheaves in the series acting onthein in successionthrough the series of roller bearing constructions and sleeves 37.

The sleeves 37 are mounted in bearings consisting of an'upper strap portion 41 and a lower thicker bearing portion 241 bolted together as shown in FigsL- 3 and 6. Said lower hearing portions 241 are secured by clamps 44 with the I-beam's below, and their vertical thickness varies successively from oneend of the series to the other end thereof,

andfthe bearingv openings for receiving .the

bearing sleeves'37 likewise lncrease lIl diamlVhenthe sheaves are assembled and.

pin 40iextending through longitudinal slots eter successively from one end of the series to the other, but are in axial alinement. The large hearing at the left hand end of th e axle is marked 42 to distinguish it as it is locked with the axle by the dowel pin The I- be'ams 11, 12 and 13 are held rigidly 'in position by the spacers 50 between them near their ends and the bolts 51 extend through-the beams and spacers.

In Fig. 5 another form of the invention is shown. The axle 123 is of uniform diameter throughout the area for mounting sheaves. It has near its left hand end a shoulder 130 similar to the shoulder 30 of Fig. 4, for the same purpose, Also the sheaves areidentical, or may beidentical', in size "and parts. The internal bores of the sheaves are of the same diameter and likewise the hearing constructions mounted therein are of the same diameter and the parts thereof are of the same size throughout. The bearings 141 for the axle differ from the bearings in Fig. 4, by extending lower'somewhat than the hub ofth'e sheavesso there will be no interference between them. This enables the sheaves to beset up closely to each other. This feature of construction could be applied to Fig. 4 and make that arrangementmore compact if desired. 1

The'adjustme'nt of the sheavesor hearings on the axle in this second form by the nut 138'and intervening sleeves 37 is the same as in the construction shown Fig. 4, excepting that there are no mtermediateshoulders in the modified form to interfere with the lateral adj ust'mentfof thesh'e'ave's. This makes possible a greater amount of adjustment in Fig. Hence since the take-up for the wear: of the parts of the five sheaves would becuniulative, the right hand sheave 22, after several adju'stments,ywould be further to the left than in'Figf 4 on account' of the shoulders ofthe latter, and this difference would apply to the three intermediate sheaves in Figp 5, but to a less degree. I V

In Fig. 5 the spacers. 151 are longer than the spacers in Fig. 4, as the two I-beams 12 and 13 are omitted to allow greater adjust llU ment' of the right hand sheave without interfering with the I -beam and itsbearing.

These sheaves are usually made of man ganese, which is rather'expensive andcannot be tooled. The bearings in the sheaves heretofore used wearoutquickly, often before one well is drilled. It isexpensive'. and difficult torepla'ce'the bearings; so heretoforeit has been usual for the entire sheave to be [thrown away, when the bearings wear too much, and an entirely'new sheave and bearing construction substituted. .This makes such. sheave crown block even more expensive? [The hearing cannot wear very much untilthe sheave begins to wobble, and; then the bearing has to be eith'r" replaced or adjusted'and taken up as shown in this'a li i I claim: 1'. A. sheave crown' block including a straight rigid axle mountedthereon, a series of sheaves mounted side by side on said axle,

and means on said axle for simultaneously adjusting,-tightening and holding in place all of said sheaves substantially as set forth.

2. A sheave crown block substantially as set forthinclaim 1, said adjusting, tightening and holding means including a. sleeve surrounding the axle between each pair of sheaves, a nut adapted to screw on one end of the axle, and a sleeve surrounding the axle 7 between said nut and one of the sheaves, substantially .as set forth,

3. A sheave crown block including a,

straight rigid axle mounted thereon having a shoulder near one end thereof and screw threaded at the other. end, a series of sheaves mounted on said axle, a sleeve on said axle between each pair of sheaves, a nut on the threaded end of the axle, and a sleeve betweenthe nut and first sheave, whereby the sheaves can all be simultaneously adjusted "in position on the axle with the sheave remote from said nut being jammed against said shoulder and the other sheaves jammed against the intervening sleeves, substantially as shown.

' justable I-beams and bearings thereon, an axle mounted in said bearings, a series of sheaves mounted side by side on said axle,

and means on said axle for simultaneously adjusting, tightening and holding in place all of said-sheaves independently of any ad' justment of the I-beams and bearings.

5. A sheave crown block including a se= ries of parallel I- beams, a row of bearings secured thereon having their axes in alinement .with each other, a straight rigid axlemounted in saidbearings and having a shoulder at one end," a series of sheaves mounted on said axle, a sleeve. mounted on said axle and in said bearlng and between each pair of sheaves, a nut screwed on the opposite end ofthe axle,

and a sleeve on said axle between said nut and the nearest sheave, said sleeves being mount-. ed in said bearings, wherebythe nut'can shift laterally all of said sheaves and hold. andtighten the same inpositi'enon theqaxle subscrewed on the opposite end of the axle and set 4; A sheave crown block including non-ad engaging the adjacent sleeve, substantially as forth. 7. A sheave crown .bloclr including a straight rigid axle having a succession of sections. of different diameters separated by shoulders and successivelyreducedin diameter from one end tothe other of'the axle, a sheave mounted on each section'of said axle near the shoulder at one'side thereof, a sleeve surrounding the remaining portion of. each section and abutting against the adjacent sheave, the width of each sheaveand its adja- 3 cent sleeve being greater than'the section of the shaft on which they are mounted so as to leave a clearance space betweeneach sheave and its adjacent shoulder excepting the sheave at one end of the series, a nut screw-threaded on the oppositerend of the axle, and a sleeve between the nut and the nearest sheave, whereby the sheaves can be adjusted to take up wear thereof and held tightly in place substantially as set forth.

8. A sheave crownblock including a series of parallel I-beamsiwiththeir tops in transverse. alinement with each other, bearings,

'each'of which consists of a top strap portion and a bottom thicker, portion, the bottom por- A.

tions of said bearings increasing in vertical thickness from one end of the series to the other, an axle having a succession of sections of different diameters separated by shoulders and successively reduced in diameter from one end to the other of the axle, a sheave mounted on each section ofsaid axle near the shoulder at one side thereof, a sleeve in each of said bearings surrounding the remaining sheave and its adjacent sleeve being greater than the sectionof the shaft on which they are mounted so as toleave'a clearance space,

and a nut screw threaded on the smaller end portion of each axle section and "abutting against the adjacent sheave, the width of each of the axle for laterally. adjusting and tightening'and holding the sheaves and sleeves in place. In Witness whereof fixed my slgnature.

I have hereunto af- I WALTER w. ERLEWINE. A

Images