US2702218A

US2702218A - Means for mounting circular rails on rotary mills

Info

Publication number: US2702218A
Application number: US315288A
Authority: US
Inventors: Paul L Schoonover
Original assignee: Monolith Portland Cement Co
Current assignee: Monolith Portland Cement Co
Priority date: 1952-10-17
Filing date: 1952-10-17
Publication date: 1955-02-15
Anticipated expiration: 1972-02-15

Description

Feb 15, 1955 P. L.. scHooNovER 2,702,218

MEANS FOR MOUNTING CIRCULAR RAILS ON ROTARY MILLS /224 UL L Senao/vo vs@ d 7 /l/.s A Trag/V675 Feb. l5,` 1955 P. L. SCHOONOVER MEANS FOR MOUNTING CIRCULAR RAILS ON ROTARY MILLS Filed Oct. 17, 1952 2 Sheets-Sheet 2 l 44 'ff-- tirnate engagement with the shell.

Unite The present invention relates in gener'alto rotary mills and, more Aparticularly,'te arail mounting for such structures, the term rotary rnill?, as used herein, lbeing intended to include any rotary, shell-likeTstructureoperating about a generally horizontal 4axis', -suchas b'all mills,

vrod mills, tumblers, drier's, kilns, and the like.

As is Well known in y the art, a rotary mill includes a shell of circular cross section rotating about "a generally horizontal axis in which materials are crushed, tumbled, dried, fired, or the like. Encircling theshell are annular rails which rest'on rollers, the latter supporting the shell and rendering it rotatable about 'itsvaXis A primary object Yof the present invention isf'to provide an improved mounting means r'or'eonnecting therails to the shell.

More particularly, an important Aobject ,of the invention is lto provide cam means carried by th'eshell'and engaging the rails for biasing the rails radiallyfinwardly into in- `In efect, the cam means shrink the annular Yrails onto the shell so as to secure them to the shell in'a positive manner.

`Another object is to lproidef'a ,cani'means yfor shrinking the annular rails onto the shell which permits ready removal of the rails for replacement, if this should ever become necessary.

Another important objectof the invention is toprovide each railwith a base having thereon an annular cam surface which'converges toward 'one-end o ftheshell, and to provide a cam ring encircling the `shell and 'having `an annular cam surface thereon which is v'doin'plernentary to and in engagement with the camsu'rfaee on the'ail, the invcntion including cam actuating me'a'ns 'carried by lthe shell and engaging'thefcam ring for biasingthe carnring 'axially of the shell in a`directionsuch that the earn surface on the cam ring tends to'ride`up"'the complementary cam surface on the rail hase so asto bias the ra1lb'a'se radially inwardly into intimate "engagement withthefs'hell. 4.

Another object is'toprovideartaryinill wherein the v rails are arranged in pairsvand in'which-the ca-m'rings'associated with the rails of eaeh ,pair'areb'ed `theishell in opposite direetionsby'theeorrespndingeam actuating "means, A related `o`bject is to .'proi/ide'a ,rotaryv 'mill whereinthe annular cam surfaees 'o'n'therails of eah "pairface away from each ether 'and whereinfthe annular camsurfaces on the camringsof `eaehlipairffacetoward eachother, the cam rings'beitig biased toward eah other axially of by the respective cam actuatingfnieans.

Another object is to prvidefclaiping means betweenv and engageabie with the basesof the'r'ailsofeaehpair' for additionally securing the rails fotlieshell. lA'related ob- `ject is to providefthe clamping ineanswithannulr can States Patent U surfaces respectively engageable with ther'nnulareahr surfaeeson therail bases f'eachpairoffra'ils.

A further object is to provide'the shell 'withvannular jgrooves therein receiving:therail'bases'so'asto keythe rails against movement airiallyof Vthe shell.

A further obiect is to up ro'vide annulr'rails ot' 'sectidnalk construction, the clamping means and the cam means v'forming the sole means of lconnecting 'therail sections together and 'to the shell.

Another object is toprovidejin asseiation`- with Aeach pairoi railstwo ormoreV pairs of oppdsnely flanged rollers, the flanges on the rollers of eachpair'engaglngthe respective rails ofthe corresponding airon 'opposite fsides` thereofto` prevent aiiial shiftlng'ofthe sh'ellrelative to thes'upportingr'ollers.

a runner abiertas to previste -`af'rstaw situ nner-ein ECC 2 the rails are ordinary railroad rails and vwherein the rollers are ordinary railroad wheels. 'Ihisjprovide's iali'o'tary mill mount which is unusually durable "and yet-much less expensive than prior rotary mill mounts.

The foregoing objects and vadvantages of 'the .present invention, together with various other objects and advantages thereof which Vwill become apparent, maybe attained with the exemplary embodiments of the invention which are illustrated inthe accompanying drawings and which are described lin detail hereinafter. Referring to the drawings:

Fig. l is a side elevationalview of a rotary 'millwhich embodies the'invention; .Y

Fig. 2 is an end elevational view of the rotary inill and is taken along the arrowed line 2 -'2 of Fig. l;

Fig. 3 is a fragmentary sectional view'onan enlarged lcale1 which is taken along the ari-'owed line V3--3 f Fig. 4 is a fragmentary 'sectional'view on an enlarged sFcale2 which is taken along the arrowed line 4 4 of Fig. 5 is an enlarged, fragmentary side elevational View of the rotary mill ofthe invention, 'thefplane f the sectional View of Fig. 4 also-being indicated onFig. i5;

Fig. 6 is a view on a reduced scale which is siinilarfto Fig. 4, but which illustrates another embodirnent-`ofthe invention; and

Fig. 7 is a fragmentary sectional view taken alongtle arrowed line 7-7 of Fig. 6.

Referring particularly 'to Figs. l and 72 of the-"dra`wings, the rotary mill illustrated therein includes a cylindrical shell 1G which is rotatable'about an axis A-A that is at least generally horizontal. 'Mounted on theshell 1l0 are two pairs of annular'r'ailsZ. Each pair ofrailsI'Z engages two horizontally spaced pairs of `rollers or wheels 13, which support'the shell -10and .provide 'for its rotation about the ax-is A-A. `Ore wheel`13 of each pair engages one of the rails `12'of the corresponding pair of rails, and the other'wheelofeac'h pair engages the other rail of the corresponding` pair of rails. The wheels of each pair are oppositely flanged, the anges engaging the sides of the rails to ,prevent axial movement of the shell it?. In the particular construction illustrated,fthe wheels 13 on the left in Fig. l have theirflangesengaging the outer sides of the rails'of the vcorresponding pair,

, shell 10.

Asbest shown in.Figs.2 and .3 -of lthe draWings,--each rail 12 preferably comprises twofor morerailsectionsfl to facilitate shaping the rails and -tofacilitateeapplying them to the shell 19, 'the -junctionsfbetween theril sections being indicated by the `numeral 122. Preferably, slight gaps vbetween the `rail sections y'21 are provided f at the junctions 22, As willibecome apparent, -therrailsil'l are secured to the shell 10in such a1manner that `no splices, or other connections, betweenrthevsections l21er each, rail are necessary.

Referring particularly V,td-Figs, 4-and S'of the `drawings, each rail 12'is-providedfwitlrarelatively widebase `2,3, a head A2li whichis engaged rbythegrimsaand flanges of the corresponding supporting wheelslyand Ianginterconnecting web ,25. As best shown in-Figx4 ofthe drawings, the .rails 12 of each pair are lprovided, -ontheir bases 23, with annular cam-surfaces'26 whichconverge toward opposite l ends fof the -shell 10 and which, -inf-the particular construction illustrated, lfacefawayifrom each other. The rail bases v23of eachpairofra'slz are also provided 'with other'annularcanisurfaees 2,7 which al f converge toward opposite ends of'thefslll "10 and in the" particular Construction.illustrated, are lpted" preferable, the rail bases of such ordinary railroad rails are already shaped to provide the aforementioned

annular cam surfaces

26 and 27 once the rails have been formed in circular congurations, which is an important advantage of utilizing ordinary railroad rails since no machining is necessary to provide the

annular cam surface

26 and 27.

The external surface of the shell 1G is provided with axially-spaced pairs of axially-spaced, annular grooves 331 therein, the rails bases 23 being disposed in the annular grooves 31, respectively. With this construction, the rails 12 are keyed against movement axially of the VYshell 10.

Disposed between the rails 12 of each pair is a clamping means 32 having annular cam surfaces 33 thereon which are complementary to and in engagement with the respective cam surfaces 27 of the corresponding pair of rails. The clamping means 32 is of sectional construction and includes a plurality of arcuate clamps 34 which, collectively, encircle the shell 1l) and which are secured to the shell, as by screws 35 extending therethrough and threaded into the shell.

The rails 12 of each pair are also secured to the shell by a pair of continuous cam rings 3S which encircle the shell and which are provided with cam surfaces 39 complementary to and in engagement with the respective cam surfaces 26 of the corresponding pair of rails. As will be apparent, if the cam rings 38 of each pair are biased toward each other, as in the particular construction illustrated, the cam surfaces 39 thereof tend to ride up on the cam surfaces 25 of the corresponding rails 12 so as to bias the corresponding rail bases 23 into intimate engagment with the shell 10. In other words the effect of biasing the cam rings 38 toward each other, in the particular construction illustrated, is to shrink the corresponding pair of rails 12 onto the shell 10 in much the Vsame manner as hoops are shrunk onto a barrel. This insures a positive connection between the rails 12 and the shell 10, but permits ready removal of the rails for replacement if this is ever necessary, which is an important feature of the invention.

The cam rings 38 are biased toward each other by a pair of actuating means 41 andV 42, respectively. The actuating means 41 comprises an actuating ring 43 which encircles the shell 1l) and engages one of the cam rings 38, the actuating ring 43 being formed in two pieces in the particular construction illustrated. Extending through the actuating ring 43 and threaded into one end of the shell li) are actuating screws 44 which, when tightened, force the corresponding cam ring 38 toward the corresponding rail 12 to cause the corresponding cam surface 39 to cam up over the corresponding cam surface 26, thereby tending to shrink the ,corresponding rail 12 onto the shell 10. Similarly, the actuating means 42 comprises an actuating ring 4S which encircles the shell 10 adjacent the other rail 12 of the pair under consideration. Welded, or otherwise secured, to the shell 10 adjacent the actuating ring 45 are lugs 46 through which actuating screws 47 are threaded, the actuating screws bearing against the actuating ring 4S so that, when tightened, they cause the corresponding cam ring 38 to cam up over the cam surface 26 of the corresponding rail 12 to tend to shrink this rail onto the shell 10 also. Thus, by tightening the actuating

screws

44 and 47 so as to bias the cam rings 38toward each other, both rails 12 are biased radially inwardly and are, in elfect, shrunk onto the shell 10 to provide a positive connection between the rails and the shell. However, it will be apparent that the rails 12 may be removed readily for replacement if this should ever be necessary, which is an important feature of the invention. Also, with this construction, no splices, or other direct connections, between the sections 21 of the rails 12 are necessary, which is an important feature.

The embodiment of Figs. 6 and 7 of the drawings is similar to that described previously and identical reference numerals are employed for corresponding components, except that the suflix "a has been added thereto. `The main difference between the two embodiments is that, in the embodiment o f Figs. 6 and 7, the actuating means 41a is identical to the actuating means 42a and includes an actuating ring 45a which is operated upon by screws 47a threaded through lugs 46a, the latter being shown as riveted to the shell 10a. The only other difference is that the arcuate clamps 34a of the clamping means 32a are riveted to the shell 10a, instead of being bolted thereto.

Although exemplary embodiments of the invention have been disclosed herein for purposes of illustration, it will be understood that various minor changes, modifications and substitutions may be incorporated in the embodiments disclosed without necessarily departing from the spirit of the invention.

l claim as my invention:

l. ln a rotary mill, the combination of: a rotary shell; a pair of rails on the exterior of and encompassing said shell; a pair of oppositely actuating cam means carried by said shell and engaging said rails, respectively, and biasing said rails radially inwardly into intimate engagement with said shell for securing said rails to said shell; clamping means between said rails for securing same to said rotary shell; and rollers engaging said rails for supporting said shell.

2. In a rotary mill, the combination of: a rotary shell of circular cross section; rails on the exterior of and encircling said shell, each of said rails having a base contacting said shell and provided with an annular cam surface thereon which converges toward one end of said shell; cam rings encircling said shell and having annular cam surfaces thereon complementary to and respectively engaging said cam surfaces on said rail bases; cam actuating means carried by said shell and respectively engaging said cam rings for biasing said cam rings axially of said shell and toward said cam surfaces on said rail bases, respectively, so as to bias said rail bases radially inwardlyinto intimate engagement with said shell; clamping means between and engaging said rails for securing same to said shell; and rollers engaging said rails for supporting said shell.

3. In a rotary mill, the combination of: a rotary shell of circular cross section; a pair of rails on the exterior of and encircling said shell, said rails having bases contacting said shell and provided with annular cam surfaces thereon which respectively converge toward opposite ends of said shell; a pair of cam rings encircling said shell and provided with annular cam surfaces thereon complementary to and respectively engaging said cam surfaces on said rail bases; a pair of cam actuating means carried by said shell and respectively engaging said cam rings for biasing said cam rings axially of said shell in opposite directions and toward said cam surfaces on said rail bases, respectively, so as to bias said rail bases radially inwardly into intimate engagement with said shell; means between said rails for spacing said rails apart to resist any tendency for said cam rings to displace said rails relative to said shell in axial directions; and pairs of rollers engaging said pair of rails for supporting said shell.

4. In a rotary mill, the combination of: a rotary shell of circular cross section; a pair of rails on the exterior of and encircling said shell, said rails having bases contacting said shell and provided with annular cam surfaces thereon which converge toward opposite ends of said shell and which face away from each other; a pair of cam rings encircling said shell and provided with annular cam surfaces thereon complementary to and respectively engaging said cam surfaces on said rail bases, said cam surfaces on said cam rings facing toward each other; a pair of cam actuating means carried by said shell and respectively engaging said cam rings for biasing said cam rings axially of said shell and toward each other so as to bias said rail bases radially inwardly into intimate engagement with said shell; means between said rails for spacing said rails apart to prevent axial displacement of said rails relative to said shell by said cam rings; and pairs of oppositely flanged rollers engaging said pair of rails for supporting said shell.

5. A rotary mill as defined in claim 4 wherein said rail bases are provided with other annular cam' surfaces thereon which respectively converge toward opposite ends of said shell and which face toward each other, said spacing means including clamping means between said rails and having annular cam surfaces thereon which are complementary to and respectively engage said other cam surfaces on said rail bases, said clamping means being secured to said shell.

6. A rotary mill as defined in claim 5 wherein said shell is provided with a pair of axially spaced, circumferential grooves therein, said rail bases being seated in saidv grooves, respectively.

M fr.

7. A rotary mill as defined in claim 4 wherein each of said cam actuating means comprises a plurality of screws threadedly connected to said shell and acting on the corresponding cam ring.

8. A rotary mill as defined in claim 4 including another pair of rails, another pair of cam rings, another pair of cam actuating means and other pairs of oppositely flanged rollers having the same relationships to said shell and to each other as the pair of rails, the pair of cam rings, the pair of cam actuating means and the pairs of oppositely ilanged rollers dened in claim 4.

9. A rotary mill as defined in claim 4 wherein each of said actuating means includes an actuating ring engaging the corresponding cam ring and includes a plurality of screws threadedly connected to said shell and engaging the corresponding actuating ring.

10. A rotary mill as defined in claim 4 wherein said rail bases are provided with other annular cam surfaces thereon which respectively converge toward opposite ends of said shell and which face toward each other, said spacing means including clamping means between said rails and having annular cam surfaces thereon which are complementary to and respectively engage said other cam surfaces on said rail bases, said clamping means being secured to said shell, said clamping means including two or more arcuate clamps disposed between said rails and secured to said shell.

11. A rotary mill as defined in claim 4 wherein said rails are ordinary railroad rails and wherein said anged rollers are ordinary railroad Wheels.

12. In a rotary mill, the combination of: a rotary Shell of circular cross section; a rail on the exterior of and encircling said shell, said rail having a base contacting said shell and provided on opposite sides thereof with annular cam surfaces which respectively converge toward opposite ends of said shell; clamping means secured to said shell on one side of said rail and having an annular cam surface thereon which is complementary to and in engagement with the annular cam surface on the corresponding side of said rail base; a cam ring encircling said shell and having an annular cam surface thereon which is complementary to and in engagement with the cam surface on the opposite side of said rail base; cam actuating means carried by said shell and engaging said cam ring for biasing said cam ring axially of said shell in a direction opposite to the direction of convergence of the cam surface on said rail base which said cam ring engages, whereby to bias said rail base radially inwardly into intimate engagement with said shell; and rollers engaging said rail for supporting said shell.

13. A rotary mill as dened in claim 12 wherein said clamping means comprises two or more arcuate clamps secured to said shell.

References Cited in the ile of this patent UNITED STATES PATENTS 778,854 Giesler Jan. 3, 1905 1,055,599 Ball Mar. 11, 1913 1,562,937 Beardsley et al. Mar. 24, 1925 FOREIGN PATENTS 11,085 Great Britain 1905