US2461754A - Sealing ring for rotary kilns - Google Patents

Sealing ring for rotary kilns Download PDF

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US2461754A
US2461754A US706439A US70643946A US2461754A US 2461754 A US2461754 A US 2461754A US 706439 A US706439 A US 706439A US 70643946 A US70643946 A US 70643946A US 2461754 A US2461754 A US 2461754A
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ring
kiln
hood
adjacent
carried
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US706439A
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Fred A Mertz
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Traylor Engineering & Manufacturing Co
Traylor Engineering & Manufacturing Comp
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Traylor Engineering & Manufacturing Comp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/22Rotary drums; Supports therefor
    • F27B7/24Seals between rotary and stationary parts
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00Pipe joints or couplings
    • Y10S285/91Gaskets

Definitions

  • The, present invention relates to rotary kilns of theityperused in, the manufacture of Portland cement andv the .like. More .particularly, the, invention is concerned with improvements in the sealing means between the end of i a rotary kiln and .the normally. stationary firing hood,: positioned adjacent thereto.
  • One of the-primary objects of the present in vention is to c overcome the difficulties encountered in the use ofprior art sealsbetween the ends ofrotary kilns and the adjacent stationary firing'hood.
  • A- furtherobjectis-to provide a construction in which the hood-need not be moved to compensateforexpansion and contraction oi.- the kiln, but inwhichthekiln is free to move axially, under the influence of temperature changes,- relative to thefiringhood.
  • a further'object of the invention- is to provide adjustable means for; accuratelydetermining the space between the fixed and movable parts of a seal for the end of a rotary kiln and associated firing hood
  • a further object is to provide a constnr pn enh e i e se eiv eeihei i t rr.an;r ieta ara isiwill n t withe ing reratiq QUE? appar tu c e e t f raes en contrad ct H59 F le; j eeli h $1.
  • Another objctof the invention is toprovide contraction of thekiln, resulting from tempera- 2 a seal of the type described i-n-which the parts areconstantly maintained in the desired, closely fittingrelation by theinfiuence of gravity, Working on one part and tending to move the same toward the other.
  • a further object is to provide long lasting, efficient, anti-frictionconnections between the fixed and movable parts, thereby reducing wear and other adversefactors.
  • Another object of the invention is to provide an improved sealingring, loosely encircling the kiln at .the discharge end, so connected thereto that the ring isjcaused to rotate with the kiln but isfree to have, relativeaxial movement with respect thereto.
  • ,Another object is to provide a seal, comprising fixed and rotatable rings so arranged that theend of the kiln is capable of axial movement through vtherings, .upon axial expansion and turezchanges.
  • Figure 3 is a vertical sectional view through the seal shown in elevation in Figure 1, looking in substantially the opposite. direction.
  • Figure 4 is a fragmentary top view of the construction shown in Figure 3.
  • Figure 5 is a detailtaken substantially on line 55 of Figure ⁇ .
  • a rotary kiln having a cylindrical metallic shell [0 and a thrust ring H may be supported for rotation on an inclined axis by suitablesupporting rollers l2 and thrust rollers i3.
  • Such kilns are usually lined with refractorymaterial l5,such as brickwork, and deliver the material during the calcining from the lower, discharge end H. The latter end of the kiln is enclosed. by a firing hood 20,
  • Means must be provided to prevent the uncontrolled inflow of cool atmospheric air into the space between the stationary firing hood and the lower end of the rotatable kiln.
  • rings or circumferential flanges fixed to the hood and kiln respectively have been employed, but such constructions make it necessary to adjust the position of the firing hood quite nicely with respect to the end of the kiln, a difficult operation, in view of the fact that long kilns, ranging up to 300 feet in length, expand and contract as much as three to six inches in length.
  • a cylindrical metal shell and nose piece 25 made of a plurality of sections and secured in place by any suitable means.
  • a ring 26 consisting of a cylindrical inner portion 21 anda radially outwardly projecting flange 28, connected together by ap limbate integral webs 29.
  • the ring is preferably made in two semicircular, cast iron or steel sections, secured together by bolts and nuts 3E1, eXtending through the jointing webs 3!, 32, thereof.
  • the forward face 34 of the flange 23 is preferably circumferentialy stepped back, as at 35, for the reception of an annular plate 35, held in place by countersunk screws 31 and nuts 38 projecting rearwardly through the flange.
  • the rear face of the flange 28 has formed integrally therewith a plurality of pairs of blocks 40, 4
  • the flange 28, in the spaces between the blocks 4i] and ll is provided with circumferentially elongated apertures or slots 43, and the ring 36 is provided'with similar slots M, registering therewith.
  • Ro lers 45 having central bearings M are journalled upon the central portions of stub shafts 41, having reduced, eccentric end portions 28, 49 seated upon the arcuate seats 42 formed in the blocks 40, 4
  • the radially outer ends 53, of the stub shafts are squared, or otherwise shaped for the reception of a wrench, for angular adjustment of the shafts when the bolts 5
  • Conventional lubricant fittings E i may be screwed into the ends of internal passages (not shown) in the shafts, to deliver grease to the bearing surfaces of the rollers 45, in the well known manner.
  • the ring 26 loosely encircles the lower dis-charge end of the kiln, so that there is no binding between the parts upon expansion and contraction, due to changes in temperature and the like, and so that the ring may move longitudinally with respect to the kiln.
  • This loose fit is indicated, diagrammatical y by the space 26, Figure 3.
  • Means for assuring that the ring rotates with the kiln are provided, in the form of a chain 55 connected at one end to a clip 56, welded to the shell 25 and at the other to an eye bolt 57, threaded into an appropriate .bore 58 in the cylindrical lower flange 2'3 of the ring 26.
  • the casing 60 of the hood 20 carries a ring plate 65, secured in place by countersunk bolts at, extending through the casing and held in place by nuts 63 or the like.
  • the ring fil is of substantially the same diameter as and registers with the ring 35, but is non-ro'tatably carried by the firing hood.
  • the rollers 45 may be projected through the slots 43 and :34, more or less, to extend beyond the front face 65 of the ring 36, to the desired extent, and to make rolling contact with the adjacent face 65 of the stationary ring El carried by the firing hood.
  • the space 6'! between the ring 36 and the ring 6! may be nicely adjusted, for the admission of controlled amounts of atmospheric air, into the firing hood, around the end of the rotary kiln, thus imparting just the desired cooling effect, without the introduction of large, uncontrolled amounts of cold air.
  • this space Bl between the stationary and rotatable rings may be changed from time to time, by simply changing the angular adjustment of the stub shafts 36.
  • a sealing connection for the discharge end of a rotary cylindrical kiln and an adjacent, normally stationary firing hood comprising a pair of rings encircling said end of the kiln, one carried by the kiln for rotation therewith and the other carried by the hood, and a plurality of rollers carried by one ring, journalled on axes disposed radially with respfictto the kilnand having anti-friction, rolling contaet:with the adjacent surface of the other ring.
  • a sealing connection for the dischargeend of "a rotary cylindrical kilnand an adjacent, normany-stationary firing hood, comprising a pair of rings encircling said end of the kiln, one car ried by the kiln for rotation therewith and for limited axial movement with respect thereto,- and the other carried by the hood in closelyxspaced relation to the firstringandja plurality of "rollers carried by the first ring, journalled on axes disposed radially with respect to the kilnandimaking rolling contact with the adjacentsurface of the second ring.
  • a connection for the lower dischargeend of an inclined, rotary, cylindrical kiln and an adjacent normally stationaryfiri'ng hood comprising a ring loosely encircling said endiof the kiln for limited axial movement with respect thereto,
  • a connection for the lower discharge end of an inclined, rotary cylindrical kiln and an adjacent normally stationary firing hood comprising a radially outwardly projecting ring loosely encircling the kiln and normally urged toward said end by gravity as thekiln rotates, a second ring carried by the hood disposed injuxtaposed r'ela-e tionto the first ring, and a plurality of rollers journalled on axes disposed radiall with respect to the kiln, carried by the first ring and making rolling contact with the surface of the second ring.
  • a connection for the lower discharge end of an inclined, rotary cylindrical kiln and an adjacent normally stationary firing hood comprising a ring encircling the discharge end of the kiln and having a continuous radially outwardly projecting, slotted flange, a second ring encircling the said end of the kiln carried by the hood having a continuous surface parallel to and facing said flange, and a plurality of rollers carried by the first ring having their peripheries projecting through the slots in the flange and making rolling contact with the second ring.
  • hood and kiln comprising a ring surrounding Isaid end'fof the kiln, mounted for limited axial movement with respect thereto, urged toward said end th'er'eofand rotatable therewith, a second ring carriedby the hoodand facing the first ring, and a plurality of circumferentially spaced rollers carriedby thefirst ring, journalledon axes disposed radially. with respect to the kiln and engaging the surface of the second ring with rolling contact, said rollers serving to space the first ring from the second a predetermined distance for the admission of a predetermined flow of atmospheric air therebetween.
  • a connection between the lower discharge end of an inclined rotary cylindrical kiln and an adjacent normally stationary firing hood, adapted to admit controlled amounts of atmospheric air into theihoool and kiln, comprising a ring loosely encircling the kiln, tending to move axially towa'rd'said end under the influence of gravityas the kiln rotates, a second ringcarried by the hood, encircling'the kiln in spaced relation thereto and facing the first ring, and a plurality of circun ferentially spaced, axially adjustable rollers carriedby the first ring, making rolling contact with the surface of the second ring and spacing the rings apart a predetermined distance, depending upon their adjusted positions, for the admission of a predetermined, variable air flow therebctween a 11.
  • a connection between the lower discharge end of an inclined rotary cylindrioalkiln and an adjacent normally stationary firing hood, adapted to admit controlled amounts of atmospheric air into the hood and kiln, comprisin a ring loosely encircling the kiln, tending to move axially toward said end under the influence'of gravity as the kiln rotates, a second ring'carried by the hood, encircling the kiln in spaced relation thereto and facing the first ring, and a plurality of circumferential spaced rollers journalled on shafts adjustably mounted behind the first ring with their peripheries projecting variable distances beyond the other face thereof and making rolling contact with the adjacent face of the other ring and spacing the rings apart a predetermined, variable distance for the admission of predetermined variable currents of atmospheric air therebetween.
  • a connection between the lower discharge end of an inclined rotary cylindrical kiln and an adjacent normally stationary firing hood, adapted to admit variable, controlled amounts of atmospheric air into the hood and kiln, comprising a ring loosely encircling said end of the kiln, having a radially outwardly projecting, slotted flange, said ring being urged toward said end by gravity as the kiln rotates, a second ring carried by the hood, encircling said end of the kiln and having a surface facing the flange of the first ring and a plurality of rollers carried by the ring, journalled behind said flange with their peripheries projecting through the slots therein and beyond the other face of the flange and making rolling contact with said surface of the second ring, said rollers serving to space the first ring from the second a predetermined distance for the admission of a predetermined flow of atmospheric air therebetween.
  • a connection between the lower discharge end of an inclined rotary cylindrical kiln and an adjacent, normally stationary firing hood, adapted to admit variable, controlled amounts of atmospheric air into the hood and kiln, comprising a ring loosely encircling said end of the kiln, having a radially outwardly projecting, slotted flange, said ring being urged toward said end by gravity as the kiln rotates, a second ring carried by the hood, encircling said end of the kiln and having a surface facing the flange of the first ring, and a plurality of circumferentially spaced rollers adjustably carried by the first ring, journalled on axes disposed radially with respect to the kiln, projecting through said slots and beyond the surface of the flange and engaging the second ring by rolling contact, the adjustment of said rollers serving to vary the space between said rings and thereby to vary the amount of atmospheric air flowing into the hood and kiln.
  • a connection between the lower discharge end of an inclined rotary cylindrical kiln and an adjacent normally stationary firing hood comprising a ring having an inner cylindrical surface loosely encircling said end of the kiln and a radially outwardly projecting flange having a plurality of slots therein, a pair of shaft-holding blocks adjacent each slot, a shaft having eccentric ends seated upon each pair of blocks, means for clamping said ends upon said blocks against rotation, a roller on each shaft projecting through the adjacent slot and therebeyond a distance determined by the angular adjustment of the shaft, and a second ring carried by the hood, facing the flange of the first ring, positioned to be engaged by said rollers, whereby the rollers space the first ring from the second a predetermined, variable distance, depending upon the angular adjust- .ment of said shafts.
  • a sealing connection for the lower discharge end of a rotary cylindrical kiln and an adjacent normally stationary firing hood comprising a ring having a circumferential portion loosely encircling said end and a radially outwardly projecting, circumferentially continuous, slotted flange, a pair of-shaft seats adjacent each slot, a stub shaft having eccentric ends mounted in each pair of seats, a roller on each shaft projecting through the adjacent slot a variable distance depending upon the angular adjustment of the shafts in said seats, and a stationary ring carried by the hood facing the first mentioned ring and around which the rollers travel by rolling contact.
  • a connection between the lower discharge end of an inclined rotary cylindrical kiln and an adjacent normally stationary firing hood comprising a ring casting having an inner, circumferential flange loosely encircling said end of the kiln and an integral radially outwardly projecting, circumierentially continuous, slotted flange, an annular plate secured to the front face of the last mentioned flange, having slots therein registering with the flange slots, a pair of shaft seats adjacent to and behind each flange slot, a stub shaft having eccentric end-s mounted in each pair of seats, a roller on each shaft projecting through the adjacent flange and plate slots a variable distance, depending upon the angular adjustment of the shaft in said seats, a flexible tension element connecting the inner flange of the ring to the kiln, causing the ring to rotate with the kiln, but permitting relative axial movement therebetween, and a stationary ring carried by the hood facing the annular plate and around which the rollers travel b rolling contact.
  • a sealing connection for the discharge end of a rotary cylindrical kiln and an adjacent, normally stationary firing hood comprising a ring carried by the hood encircling said end of the kiln, a second ring loosely encircling the kiln for axial movement with respect thereto, connecting means between the kiln and the second ring for causing the latter to rotate with the kiln, and a plurality of rollers journalled on axes disposed radially with respect to the kiln, carried by one of the rings and making rolling contact with the adjacent surface of the other ring.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Description

Feb. 15, 1949. MERTZ 2,461,754
SEALING RING FOR ROTARY KILN S Filed Oct. 29, 1946 v 2 Sheets-Sheet 1 Qrwe/wtov ertz fiedAM Feb. 15, 1949. F. A. MERTZ SEALING RING FOR ROTARY KILNS 2 Sheets-Sheet 2 Filed 001;. 29, 1946 M M M 56 FfeJA.Me1-tz Patented Feb. 15, 1949 UNITED I STAT SEALING RING FOR ROTARY KILNS Fred A. .Merta, Allentown, Pa.,. assignor to Traylor Engineering & Manufacturing Company, Allen'- town,'Pa., a corporation otDelaware Application October 29, 1946, Serial No. #06339 7 18 Claims. (Cl. 285- The, present invention relates to rotary kilns of theityperused in, the manufacture of Portland cement andv the .like. More .particularly, the, invention is concerned with improvements in the sealing means between the end of i a rotary kiln and .the normally. stationary firing hood,: positioned adjacent thereto.
In thepast, various. types of seals have been providedbetween .the' .ends ofrotary kilns and the adjacent firing hoods, =but numerous difii-- culties and disadvantageshaw been encountered in their-use Oneof themost generallyusedconstructions consists of a pair of flanged: rings carried by the kiln and hoodrespectively, making a: substantially running v contact orspaced apart apredetermined distance, for the admission of currents of atmospheric air, tending to maintain the end of the kiln shell at-reasonably cool temperatures, to prevent-overheating and burning out ot-the same. ln such constructions however, it has been necessary to advance andretract the firing hood with respect to therotary kiln, to
compensate for axial expansion and contraction of the latter under the influence of temperature changes. Even though; the firing hood be mounted on track supported wheels, the adjustment of the hood and its associated parts is a laborious and troublesome operation. Moreover, dimculty is encountered in maintaining the space between the-fixed and metatable rings constant during the operation of the apparatus, andnicety of adjustment inthis connection has been-difficult or impossible to accomplish.
.One of the-primary objects of the present in vention is to c overcome the difficulties encountered in the use ofprior art sealsbetween the ends ofrotary kilns and the adjacent stationary firing'hood.
A- furtherobjectis-toprovide a construction in which the hood-need not be moved to compensateforexpansion and contraction oi.- the kiln, but inwhichthekiln is free to move axially, under the influence of temperature changes,- relative to thefiringhood. T
A further'object of the invention-is to provide adjustable means for; accuratelydetermining the space between the fixed and movable parts of a seal for the end of a rotary kiln and associated firing hood A further object is to provide a constnr pn enh e i e se eiv eeihei i t rr.an;r ieta ara isiwill n t withe ing reratiq QUE? appar tu c e e t f raes en contrad ct H59 F le; j eeli h $1.
temperature changes.
' Another objctof the invention is toprovide contraction of thekiln, resulting from tempera- 2 a seal of the type described i-n-which the parts areconstantly maintained in the desired, closely fittingrelation by theinfiuence of gravity, Working on one part and tending to move the same toward the other.
A further objectis to provide long lasting, efficient, anti-frictionconnections between the fixed and movable parts, thereby reducing wear and other adversefactors.
Another object of the invention is to provide an improved sealingring, loosely encircling the kiln at .the discharge end, so connected thereto that the ring isjcaused to rotate with the kiln but isfree to have, relativeaxial movement with respect thereto.
,Another object is to providea seal, comprising fixed and rotatable rings so arranged that theend of the kiln is capable of axial movement through vtherings, .upon axial expansion and turezchanges.
Other and further objects and advantages of scale, taken substantially on the line 2-2 of Figure 1.. a
Figure 3 is a vertical sectional view through the seal shown in elevation in Figure 1, looking in substantially the opposite. direction.
Figure 4 is a fragmentary top view of the construction shown in Figure 3, and
Figure 5 is a detailtaken substantially on line 55 of Figure}.
As is well understood in the art a rotary kiln, having a cylindrical metallic shell [0 and a thrust ring H may be supported for rotation on an inclined axis by suitablesupporting rollers l2 and thrust rollers i3. Such kilns are usually lined with refractorymaterial l5,such as brickwork, and deliver the material during the calcining from the lower, discharge end H. The latter end of the kiln is enclosed. by a firing hood 20,
also constructed of refractory material and of the kiln maintains a sub-atmospheric pressure in the kiln and firing hood, all as is well understood in the art.
Means must be provided to prevent the uncontrolled inflow of cool atmospheric air into the space between the stationary firing hood and the lower end of the rotatable kiln. In the past, rings or circumferential flanges fixed to the hood and kiln respectively have been employed, but such constructions make it necessary to adjust the position of the firing hood quite nicely with respect to the end of the kiln, a difficult operation, in view of the fact that long kilns, ranging up to 300 feet in length, expand and contract as much as three to six inches in length. x i
In accordance with the present invention, th lower end of the kiln is provided with a cylindrical metal shell and nose piece 25, made of a plurality of sections and secured in place by any suitable means. Around the shell 25, there is loosely fitted a ring 26, consisting of a cylindrical inner portion 21 anda radially outwardly projecting flange 28, connected together by ap propriate integral webs 29. As indicated in Figure 2, the ring is preferably made in two semicircular, cast iron or steel sections, secured together by bolts and nuts 3E1, eXtending through the jointing webs 3!, 32, thereof.
The forward face 34 of the flange 23 is preferably circumferentialy stepped back, as at 35, for the reception of an annular plate 35, held in place by countersunk screws 31 and nuts 38 projecting rearwardly through the flange.
The rear face of the flange 28 has formed integrally therewith a plurality of pairs of blocks 40, 4|, having arcuate seats 42 formed therein, for purposes hereinafter explained.
The flange 28, in the spaces between the blocks 4i] and ll is provided with circumferentially elongated apertures or slots 43, and the ring 36 is provided'with similar slots M, registering therewith.
Ro lers 45 having central bearings M are journalled upon the central portions of stub shafts 41, having reduced, eccentric end portions 28, 49 seated upon the arcuate seats 42 formed in the blocks 40, 4| and held'in place, against inadvertent rotation by caps 50, adapted to be pulled down tightly by bolts 52, threaded into appropriate bores formed in the blocks ill, 5!. The radially outer ends 53, of the stub shafts are squared, or otherwise shaped for the reception of a wrench, for angular adjustment of the shafts when the bolts 5|, 52 are loosened slightly. Conventional lubricant fittings E i may be screwed into the ends of internal passages (not shown) in the shafts, to deliver grease to the bearing surfaces of the rollers 45, in the well known manner.
As noted above the ring 26 loosely encircles the lower dis-charge end of the kiln, so that there is no binding between the parts upon expansion and contraction, due to changes in temperature and the like, and so that the ring may move longitudinally with respect to the kiln. This loose fit is indicated, diagrammatical y by the space 26, Figure 3. Means for assuring that the ring rotates with the kiln are provided, in the form of a chain 55 connected at one end to a clip 56, welded to the shell 25 and at the other to an eye bolt 57, threaded into an appropriate .bore 58 in the cylindrical lower flange 2'3 of the ring 26. Hence, as the kiln rotates in the direction of the arrow in Figure 2, the ring is caused to rotate therewith by the chain 55, but relative axial 4 movement between the ring and the kiln is permitted, by reason of the flexilibity of the chain.
The casing 60 of the hood 20 carries a ring plate 65, secured in place by countersunk bolts at, extending through the casing and held in place by nuts 63 or the like. The ring fil is of substantially the same diameter as and registers with the ring 35, but is non-ro'tatably carried by the firing hood.
By adjusting the angular positions of the stub shafts 41, in their seats 42, the rollers 45 may be projected through the slots 43 and :34, more or less, to extend beyond the front face 65 of the ring 36, to the desired extent, and to make rolling contact with the adjacent face 65 of the stationary ring El carried by the firing hood. Hence, the space 6'! between the ring 36 and the ring 6! may be nicely adjusted, for the admission of controlled amounts of atmospheric air, into the firing hood, around the end of the rotary kiln, thus imparting just the desired cooling effect, without the introduction of large, uncontrolled amounts of cold air. Of course, this space Bl between the stationary and rotatable rings may be changed from time to time, by simply changing the angular adjustment of the stub shafts 36.
Due to the angle of inclination of the kiln as a whole and the loose connection between the ring assembly 26 and the kiln shell or nose piece 25, the ring tends to move downwardly toward the dis-charge end, under the influence of gravity, out the movement is resisted by the rolling contact between the rollers 45 and the stationary ring 6i carried by the hood. However, the end i alents are intended to be included.
I claim:
1. A sealing connectionfor the discharge end of an elongated cylindrical rotary kiln of the type normally subjected to longitudinal expansion and contraction under the influence of temperature changes, and an adjacent normally stationary firing hood, said connection comprising an outwardly projecting ring encircling the kiln adjacent said end thereof, a similar ring carried by the hood, encircling the kiln and having a surface facing the first ring, one of said rings being movable axially with respect to the kiln to compensate for expansion and contraction thereof, and the other ring being relatively fixed, and a plurality of rollers carried by one of the rings, making rolling contact with the other, said rollers being journalled on axes disposed radially with respect to the kiln and being adjustable relative to the first ring to vary the clearance between the two.
2. A sealing connection for the discharge end of a rotary cylindrical kiln and an adjacent, normally stationary firing hood, comprising a pair of rings encircling said end of the kiln, one carried by the kiln for rotation therewith and the other carried by the hood, and a plurality of rollers carried by one ring, journalled on axes disposed radially with respfictto the kilnand having anti-friction, rolling contaet:with the adjacent surface of the other ring.
3 A sealing connection for the dischargeend of "a rotary cylindrical kilnand an adjacent, normany-stationary firing hood, comprising a pair of rings encircling said end of the kiln, one car ried by the kiln for rotation therewith and for limited axial movement with respect thereto,- and the other carried by the hood in closelyxspaced relation to the firstringandja plurality of "rollers carried by the first ring, journalled on axes disposed radially with respect to the kilnandimaking rolling contact with the adjacentsurface of the second ring.
4. A sealing connection for the .end of a rd tary cylindrical kiln and an adjacent normally stationary firing hood, comprising aring loosely encircling the discharge end portiona'of Tthez'kiln,
rotatable therewith andcapable of limited relative axial movement thereon, another ringfacing thefirst ring, carried by the hood; and'antifriction'means carried by one of said rings making rolling contact with the other.
5. A connection for the lower dischargeend of an inclined, rotary, cylindrical kiln and an adjacent normally stationaryfiri'ng hood, comprising a ring loosely encircling said endiof the kiln for limited axial movement with respect thereto,
flexible connecting means between the ringand kiln, causing the ringto rotate with thekiln', and a second, ringcarried'by the hood encircling said end of the kilnand positioned injuxtapo'sed relation to the first ring, whereby 'the'fi'rstring', under theinfiuence of gravity'tends'toimove toward the second as the-kiln rotates, expansion and contraction of the kiln 'throughsaid rings a said end by gravity as the kiln rotatesy'a second,
ring carried by' the hood disposed in juxtaposed relation to the first ring, and a plurality of rollers carried by the first "ring 'mak'ing' anti-friction rolling contact with the second.
7. A connection for the lower discharge end of an inclined, rotary cylindrical kiln and an adjacent normally stationary firing hood, comprising a radially outwardly projecting ring loosely encircling the kiln and normally urged toward said end by gravity as thekiln rotates, a second ring carried by the hood disposed injuxtaposed r'ela-e tionto the first ring, and a plurality of rollers journalled on axes disposed radiall with respect to the kiln, carried by the first ring and making rolling contact with the surface of the second ring.
8. A connection for the lower discharge end of an inclined, rotary cylindrical kiln and an adjacent normally stationary firing hood, comprising a ring encircling the discharge end of the kiln and having a continuous radially outwardly projecting, slotted flange, a second ring encircling the said end of the kiln carried by the hood having a continuous surface parallel to and facing said flange, and a plurality of rollers carried by the first ring having their peripheries projecting through the slots in the flange and making rolling contact with the second ring.
9. A connection between the discharge end of a rotary cylindrical kiln and an adjacent, normally stationary firing hood, adapted to admit controlled amounts of atmospheric air into :the
hood and kiln,'comprising a ring surrounding Isaid end'fof the kiln, mounted for limited axial movement with respect thereto, urged toward said end th'er'eofand rotatable therewith, a second ring carriedby the hoodand facing the first ring, and a plurality of circumferentially spaced rollers carriedby thefirst ring, journalledon axes disposed radially. with respect to the kiln and engaging the surface of the second ring with rolling contact, said rollers serving to space the first ring from the second a predetermined distance for the admission of a predetermined flow of atmospheric air therebetween. I
'10. A connection between the lower discharge end of an inclined rotary cylindrical kiln and an adjacent normally stationary firing hood, adapted to admit controlled amounts of atmospheric air into theihoool and kiln, comprising a ring loosely encircling the kiln, tending to move axially towa'rd'said end under the influence of gravityas the kiln rotates, a second ringcarried by the hood, encircling'the kiln in spaced relation thereto and facing the first ring, and a plurality of circun ferentially spaced, axially adjustable rollers carriedby the first ring, making rolling contact with the surface of the second ring and spacing the rings apart a predetermined distance, depending upon their adjusted positions, for the admission of a predetermined, variable air flow therebctween a 11. A connection between the lower discharge endof an inclined rotary cylindrical kiln and an adjacent normally stationary firlng'hooiadapted to admit controlled amounts of atmospheric air-into the hood and kiln, comprising ari-ng loosely encircling the kiln, tending to move axially toward :said .end under the "influence of gravity as the kiln rotates, a second ring carried by the hood, encircling the kiln in spaced relation thereto and'fa-cing the first ring, and a plurality of circumferentially spaced rollers carried by the rear surfaces of the first ring with their peripheries projecting axially beyond the other face thereof and making rolling contactwii'h the adjacent face of the second ring and spacing the rings a pre' determined distance apart for the admission of a predetermined flow of atmospheric air therebetween. V
12. A connection between the lower discharge end of an inclined rotary cylindrioalkiln and an adjacent normally stationary firing hood, adapted to admit controlled amounts of atmospheric air into the hood and kiln, comprisin a ring loosely encircling the kiln, tending to move axially toward said end under the influence'of gravity as the kiln rotates, a second ring'carried by the hood, encircling the kiln in spaced relation thereto and facing the first ring, and a plurality of circumferential spaced rollers journalled on shafts adjustably mounted behind the first ring with their peripheries projecting variable distances beyond the other face thereof and making rolling contact with the adjacent face of the other ring and spacing the rings apart a predetermined, variable distance for the admission of predetermined variable currents of atmospheric air therebetween.
13. A connection between the lower discharge end of an inclined rotary cylindrical kiln and an adjacent normally stationary firing hood, adapted to admit variable, controlled amounts of atmospheric air into the hood and kiln, comprising a ring loosely encircling said end of the kiln, having a radially outwardly projecting, slotted flange, said ring being urged toward said end by gravity as the kiln rotates, a second ring carried by the hood, encircling said end of the kiln and having a surface facing the flange of the first ring and a plurality of rollers carried by the ring, journalled behind said flange with their peripheries projecting through the slots therein and beyond the other face of the flange and making rolling contact with said surface of the second ring, said rollers serving to space the first ring from the second a predetermined distance for the admission of a predetermined flow of atmospheric air therebetween.
14. A connection between the lower discharge end of an inclined rotary cylindrical kiln and an adjacent, normally stationary firing hood, adapted to admit variable, controlled amounts of atmospheric air into the hood and kiln, comprising a ring loosely encircling said end of the kiln, having a radially outwardly projecting, slotted flange, said ring being urged toward said end by gravity as the kiln rotates, a second ring carried by the hood, encircling said end of the kiln and having a surface facing the flange of the first ring, and a plurality of circumferentially spaced rollers adjustably carried by the first ring, journalled on axes disposed radially with respect to the kiln, projecting through said slots and beyond the surface of the flange and engaging the second ring by rolling contact, the adjustment of said rollers serving to vary the space between said rings and thereby to vary the amount of atmospheric air flowing into the hood and kiln.
15. A connection between the lower discharge end of an inclined rotary cylindrical kiln and an adjacent normally stationary firing hood, comprising a ring having an inner cylindrical surface loosely encircling said end of the kiln and a radially outwardly projecting flange having a plurality of slots therein, a pair of shaft-holding blocks adjacent each slot, a shaft having eccentric ends seated upon each pair of blocks, means for clamping said ends upon said blocks against rotation, a roller on each shaft projecting through the adjacent slot and therebeyond a distance determined by the angular adjustment of the shaft, and a second ring carried by the hood, facing the flange of the first ring, positioned to be engaged by said rollers, whereby the rollers space the first ring from the second a predetermined, variable distance, depending upon the angular adjust- .ment of said shafts.
16. A sealing connection for the lower discharge end of a rotary cylindrical kiln and an adjacent normally stationary firing hood, comprising a ring having a circumferential portion loosely encircling said end and a radially outwardly projecting, circumferentially continuous, slotted flange, a pair of-shaft seats adjacent each slot, a stub shaft having eccentric ends mounted in each pair of seats, a roller on each shaft projecting through the adjacent slot a variable distance depending upon the angular adjustment of the shafts in said seats, and a stationary ring carried by the hood facing the first mentioned ring and around which the rollers travel by rolling contact.
17. A connection between the lower discharge end of an inclined rotary cylindrical kiln and an adjacent normally stationary firing hood, comprising a ring casting having an inner, circumferential flange loosely encircling said end of the kiln and an integral radially outwardly projecting, circumierentially continuous, slotted flange, an annular plate secured to the front face of the last mentioned flange, having slots therein registering with the flange slots, a pair of shaft seats adjacent to and behind each flange slot, a stub shaft having eccentric end-s mounted in each pair of seats, a roller on each shaft projecting through the adjacent flange and plate slots a variable distance, depending upon the angular adjustment of the shaft in said seats, a flexible tension element connecting the inner flange of the ring to the kiln, causing the ring to rotate with the kiln, but permitting relative axial movement therebetween, and a stationary ring carried by the hood facing the annular plate and around which the rollers travel b rolling contact.
18. A sealing connection for the discharge end of a rotary cylindrical kiln and an adjacent, normally stationary firing hood, comprising a ring carried by the hood encircling said end of the kiln, a second ring loosely encircling the kiln for axial movement with respect thereto, connecting means between the kiln and the second ring for causing the latter to rotate with the kiln, and a plurality of rollers journalled on axes disposed radially with respect to the kiln, carried by one of the rings and making rolling contact with the adjacent surface of the other ring.
FRED A. MERTZ.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number
US706439A 1946-10-29 1946-10-29 Sealing ring for rotary kilns Expired - Lifetime US2461754A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632658A (en) * 1948-12-30 1953-03-24 Traylor Engineering & Mfg Comp Sealing ring for rotary kilns
US2792339A (en) * 1952-12-31 1957-05-14 Standard Oil Co Rotary sludge coker wearing ring
US2822153A (en) * 1953-01-02 1958-02-04 Gerald D Arnold Agricultural dehydrating system
US3065538A (en) * 1956-12-05 1962-11-27 Kuppers Metallwerk G M B H Soldering method and composition
US3706482A (en) * 1971-07-15 1972-12-19 Toscotech Corp Pressure seal assembly
US3895812A (en) * 1974-01-21 1975-07-22 Jr Hugh Harr Bi-metallic seal
EP0113552A1 (en) * 1982-12-14 1984-07-18 British Nuclear Fuels PLC Method of and apparatus for monitoring a rotary kiln
US4554876A (en) * 1983-05-09 1985-11-26 Krupp Polysius Ag Rotary kiln with cooler

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1606124A (en) * 1919-07-09 1926-11-09 Granular Iron Company Rotary-kiln apparatus
US1620989A (en) * 1926-06-14 1927-03-15 Allis Chalmers Mfg Co Packing
US2154632A (en) * 1930-09-08 1939-04-18 Albert J Meier Seal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1606124A (en) * 1919-07-09 1926-11-09 Granular Iron Company Rotary-kiln apparatus
US1620989A (en) * 1926-06-14 1927-03-15 Allis Chalmers Mfg Co Packing
US2154632A (en) * 1930-09-08 1939-04-18 Albert J Meier Seal

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632658A (en) * 1948-12-30 1953-03-24 Traylor Engineering & Mfg Comp Sealing ring for rotary kilns
US2792339A (en) * 1952-12-31 1957-05-14 Standard Oil Co Rotary sludge coker wearing ring
US2822153A (en) * 1953-01-02 1958-02-04 Gerald D Arnold Agricultural dehydrating system
US3065538A (en) * 1956-12-05 1962-11-27 Kuppers Metallwerk G M B H Soldering method and composition
US3706482A (en) * 1971-07-15 1972-12-19 Toscotech Corp Pressure seal assembly
US3895812A (en) * 1974-01-21 1975-07-22 Jr Hugh Harr Bi-metallic seal
EP0113552A1 (en) * 1982-12-14 1984-07-18 British Nuclear Fuels PLC Method of and apparatus for monitoring a rotary kiln
US4533319A (en) * 1982-12-14 1985-08-06 British Nuclear Fuels Limited Method of and apparatus for monitoring a rotary kiln assembly
US4554876A (en) * 1983-05-09 1985-11-26 Krupp Polysius Ag Rotary kiln with cooler

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