Патент USA US2279639код для вставки
April 14, 1942. ‘M. L. RAHNER _ 2,279,639 END LINER FOR GRINDING MILLS ‘Filed April 10, 1959 2 Sheets-Sheet 1 INVENTOR. m4. MAXWELL ‘L. RAHNER.‘ BY Q ATTORNEY. ' April 14, 1942. 2,279,639 M. L. RAHNER‘ END LINER‘FOR GRINDING MILLS Filed April 10, 1939 2 Sheets-Sheet 2 'INV‘ENTOR. . AXWELL LAHNER MAJ‘, ‘‘ r} ATTORNEY‘. 2,279,639‘? Patented Apr. 14, 1942 UNlTED STATES PATENT‘ OFFICE} END LINER FOR GRINDING M Maxweli'ln Raliner, Hi'ghl'amiil’a-rk; Application-April 10, 1939; 'Serial'No. 267,112. 5 Claims: I (Cl; 83-9)‘ A further; obiect is: to provide endrliner quad-, rant's: in: association with; an: insert having; par allel side portionstoa?ord- ready removal-.‘there This invention relates; to‘ grinding mills and more particularly to‘ improved‘; end: liners-there. for, although. certain features thereof. may be employed with equal advantage: for other; pur poses. of ‘ and; provide.v space. to. separate,- the’ remaining . quadrants'or. radial; sectors. I It contemplates: more especially the: provision of improved end'liners. for grinding-millsto: en able the removal» thereof withminimum> expen diture of time: and eifort, thereby‘ permitting speedy and unhampered‘ access to the working mechanism and interior of? the.- grindingv millzfor interior reconditioning:v and replacement-rot parts Astill further object. is; to provide end liner quadrants‘ of; standard-i shape in conjunctionwith a:speciaLsectionshaped to afford thev ready; de tachment thereof; without, appreciably; increas ing. the expense‘. of; constructiongand substantially increasing; the removabilityr of: the interior parts thereof; _ Numerous types. of grinding mill, liners. have been proposed and for the most; part these are formed from east material or’ rolled plates~‘inter-. Still a» furtherobiectis to provide aplurality 0tv endliner sections complemental to~each other and=an insert havinggthe; side edges or‘ portions thereof disposed-parallel.- to-each other for per posed» with lifting members and - anchoring: expe mitting the ready removal thereof so that the dients therefon These.- liners and lifting: ele ments are subjected to severe; wear and? require remaining quadrants are readily detachable. Other objects and advantages will appear from such asliners;v or: even .the end? liners; frequent: replacement. Accessibility to- the- inte 20 the following‘ description of an illustrative em bodiment of thepresent invention; rior of the grinding mill is, therefore; an'impor In the, drawings-z , tant considerationv and, should: be accomplished Figure 1 is a perspective. sectional View of a with minimum; effort and without: entailing: too grinding mill showing a portion, of its. interior much time. It has been found that the provision looking toward the.- feeding-end- or openv trun of readilyv removable end liner plates solves the nion, the, end. liner seotionsbeing shaped.’ to em problem of rendering’ the interior of grinding body teachings of the present invention. mills accessible from the standpoint of.‘ simplify: Figure 2. is: av perspective view of an endveplate ing; housing; liner replacement.’ and open mounting trunnion looking from the With the teachings. of the present invention; the end liner plates are so arranged and con. I19 interior and showing end linersin- operative re lation therewith, certain of. the end- liner ‘sec structed as to - afford speedy detachment thereof tions being shaped to embo.dyffeatures_- of the without. entailing the usual! time, labor andeffort present . invention. . required with the end» liner. sector plates of quad‘ Figure. v3 isa fragmentary sectional: view'taken rant shapes: While- expedients to; render end liner‘ quadrantsv readily removable have.- heretd- . fore been proposed, such. have not. ‘been, adopted ' with, any degree of. success because they: appre ciablyenhance the cost of end'liners‘.» and‘. require loosely associated end~ liner sections vthatfare not entirely satisfactory. ' ' One object of the present invention‘ is.- tosim plify the construction and improve. end liner sec tions. designed to render- such more readilywree movable. - ~ Another object is: to provide, end liner grind is. ing mill segments. of. standard; shapes witha. sine substantially along‘ line_-III—III of Figure 1'. Figure. 4. is a. perspectiveview of an. end liner insertembodying features-of the present inven tion and shown inassembled relation in Figure 2. Figure 5. is a fragmentary. perspective View similar to Figure 2 and‘ showing; modi?ed end liner sections. embodying: features of the presen invention. ‘ . Figure 6; ispa fragmentary perspective view ‘of aspecialend-.linerv insert shown in assembled re lation:in Figure 5; , Figure‘ 7 is a fragmentary perspective; view of an end liner auxiliary insert constituting'a com. gle intermediaryv section’ of special" construction to. a?ord the, ready removal thereof for gaining plement of' the insert shown in Figurea?. . ' accesstothe interior of grinding‘. mills. Figure 8 is a fragmentary perspective View Still. anotherbbject. is. tov provide grinding mill 50 similar to Figure 2*and? showing a still further end liners of substantially standard shapes for modi?edv end liner: sections embodying features association with a special and liner segment that of‘ the present ‘invention. is. readily removable to- permit, remaining sec Figure 9'is- arfragmentary- perspective view of' tions, to i be. detached without entailing much theqspecial, end linercasingshown in‘ assembled time. labor or expense; relation in Figurez?g‘ : " ' - 2 ‘2,279,639 Figure 10 is a fragmentary sectional view of ripheral edges 32 of the shell Ill to receive sub— a corner section of a grinding mill showing the internal liner in its relation with an end liner stantially circular end shell heads 36. The cir cumferential edge region of the heads 36 are section of the type shown in Figure 9. provided with a plurality of circumferentially The structure selected for illustration com spaced apertures 31 that are in aligned registry prises a substantially cylindrical shell III of a with corresponding apertures 38 provided in the conventional grinding mill. The shell I6, in peripheral ?ange 34 of the shell I6, to receive ths instance, has its interior lined with a plu fastener bolts 39 therethrough. rality of detachably associated ?at steel rec The fastener bolts 39 are provided with tangular plates II. The substantially ?at rec 10 threaded nuts 46 that serve to securely attach tangular plates H extend for any desired length the end shell heads 36 to the shell I6. As shown, and width, and merely comprise a component the intake end head 36 is provided with an axial part of the sectional liner that extends longi trunnion M, in this instance formed integral tudihally for the length of the grinding mill therewith, to serve as a housing mount. To this shell II). To this end, the substantially ?at liner 15 end, the trunnion 4| is provided with an an plates II extend longitudinally of~~each other nular groove 42 that cooperates with correspond~ so that their ends I2-—I3 are in adjacent con~ ingly sized and shaped bearings associated with tact (Figure 3) and the number depend upon standards on suitable bearing brackets for jour the requirements of handling and the length of nalled support of the shell I6 through the medi the particular grinding mill shell I6 together um of their end trunnions 4!. The intake trun with the most e?icient unit size thereof. nion M is provided with an enlarged axial bore A plurality of frusto-conical apertures I4, in 43 through which the shell I U is charged with the this instance two, are provided along a longi desired articles to be ?nished therein. tudinal median line of each plate II to receive The tubular trunnion M is sized so that the‘ anchoring fasteners such as threaded bolts I6 25 attendant can have access to the interior of the having correspondingly shaped and sized heads shell I0 therethrough for the purpose of manip I]. The frusto-conical heads H of the threaded ulating a plurality of end liner plates 44 attached fastener bolts I6 and the apertures I4 are pref to the interior surface of the circular shell end erably provided with complemental inter-engag head plate 36. To this end, the end liner plates ing means more particularly illustrated and de 30 44 or plurality of sectors have their inclined scribed in my copending application serially side, edges 45 and 46 disposed along the radii numbered 256,679 and ?led February 16, 1939, of the end head or mounting plate 36 to de?ne thereby precluding the fasteners I6 from turn complemental sectors 44. The complemental ing as their nuts H are turned down tight sectors 44 are sized in a sufficient number to against the shell I0 with the fastener shank I6 35 cover the entire exposed interior surface of the projecting through suitable apertures 22 there trunnion plate or head 36. in. Because the converging sides 45 and 46 of The width of the plates and the number there the sectors 44 do not permit ready tilting or of that are circumferentially spaced around the linear displacement of one relative to the other internal periphery of the shell depends upon 40 in the direction of the axis of the shell I6 and the diameter thereof and the size of the lifting trunnion M to permit their removal for replace elements 23 disposed therebetween. The lifting ment purposes, it has been found desirable to elements 23 preferably though not essentially interpose therebetween an insert plate 4‘! hav consist of standard rails having side channels ing parallel sides 48 and 49 preferably though 24 and 25 that de?ne the rail head 26 and a 45 not essentially extending for the entire border substantially wider base flange 21, a cross section between the bore 43 and the truunion M and the thereof being of standard and conventional de internal diameter of the shell II] to render such sign with the channels 24-'—25 serving to receive the side edges 28 and 29 of the liner plates II disposed therebetween to de?ne a continuous liner comprising the plates II and the inter mediary lifting elements 23. Turning the nuts 2| down tight exteriorly of the shell in will serve to retain the lifting readily movable by permitting the tiltable dis placement thereof relative to its parallel edges 48-49. In consequence thereof, the next adjacent sec tors v5%‘! and 5I are shaped to serve as comple ments of the insert end liner plate 4'! to the end that their confronting edges Hand 53 are dis elements 23 in a predetermined assembled rela 55 posed parallel to the radial mediun line of the tion therewith for turning with the shell I6. insert 41 so that the end liner plates 4'I-50—5I With this arrangement, the lifting elements 23 are complements of each other with their outside are secured indirectly by the liner plates I I, and edges 54 and 55 conforming to and disposed along this affords the convenient replacement of either the radii to correspond with the converging sides or both elements II—23 comprising the internal 60 45-46 of the next adjacent standard end liner liner of the shell I0. It should be observed that sectors 44. the lower longitudinal corners 33 and 3| of the It will be apparent, therefore, that the end liner plates II will engage the base 21 so as to liner insert 41 can be tilted or displaced radially effectively grip the base 21 therebetween to avoid toward the center of the trunnion 4| by the ap the minutely ground materials con?ned interi 65 plication of manual force through the bore 43 orly of the liners II—23 to ?nd their way to the therein. After the end liner insert-41 has been shell I0, thereby avoiding appreciable wear and removed in this manner, there is su?icient space injury thereto over long periods of operating available to circumferentially displace the re use. maining end liner sectors 44—50—5I so that they It will be observed that the shell I6 has its can be removed in their entirety for replacement peripheral end regions 32 provided with a rein after being excessively worn responsive to the forcing collar 33 thatis welded or otherwise extended use thereof. , joined thereto to present an upstanding periph It is to be noted that the end liner sectors eral flange 34. The ?nished ?at surface 35 of 44—4‘I—50-5I are attached to the end head or the collar ?ange 34 is in alignment‘ with the pe 75 trunnion supporting plate 36 by means of thread 23279§63Q3 ed~ bolts 5e and? 51; in thi’siinst'ance’two, that project" through‘- aligned! apertures: 58;-"-59‘ pro-s and‘: 6-1' are presented by? cutting off the: outer‘ ' cornerszof‘ one“ of the‘end liner sectors: 44:". 'lfheireino‘val of the'iouter corner-s1 presented by‘ vided; inle'a'chi of' the end liner'» sectors 44 includi ing the? liner'insert 41' and the; complemental adjaeent'liner sectors 50'—5|.» The fastener bolts the comparatively‘ shortf parallel: sides-52 ’ ' '-53 ' " ' (Figure 9) in-conj'uncti'on with. the bevelled outer edge: 65’ will: permit thepivoting of. the- insert‘ liner: sectors 44"’ along:- the,‘v parallel edge por 56-51'prefer'ably have" tapered heads 60 seated ' in» correspondingly shaped apertures 58‘—59, in this instance; two, provided in the end liner sec tors‘ 4'4‘—-4v'!‘—56'—5l‘. The‘ bolt shanks project tions 52"’—53"' thereof’ to: assume a position shown in dotted outline" inzFigure 10. The bev through corresponding aligned apertures 59 in 10 elled." outer circumferential surface‘ 65' provides‘ the end head or trunnion supporting plate: 36 to 'clearance‘relativelto the, internal surface of the receive fasteners such as‘ threadednuts 6| that shell head or" trunnion supporting. plate 36". It are" exteriorly accessible for securing. the end will be appreciated, therefore, that after the-end liners‘. 44--41-50—-5| in, position and. permit liner sectors: 44"’ with; its.- parallel outer edges their removal. ‘ 15 Elm-53"” have: been‘wpivoted to a position af It will be apparent,therefore, that the standard fordingv clearance for the» comparatively longer eridiliner sectors 44 are‘rendered readily remov converging radial edge portions 45" andv 46" able without entailing any appreciable’time, labor thereof, the insert segments 44" can- be dis or expensebyprovidingpa.parallel side therebe placed inwardly in the direction of the axis of tween together with complemental sectors 5ll—5l the shell ID to effect its complete removal. adjacent thereto. It isworthy of note-that the The remaining liner'sectors 44" are of standard inner and outer radial ends 63 and 3 of the end design conforming to the end liner' segments or liner sectors 44—41—-5?—5l are of arcuate con sectors“ (Figure l) and 44’ (Figure-5). This ?guration to conform with the circumference of construction avoids necessity of, having special theitrunnion bore 43 and the interior diameter complemental liner sectors adjacent to-the spec of the shell I 0;- respectively, so that they will serve iallyi constructed insert-41" (Figure 9): and still to cover‘ and provide a full liner for the interior surface of the shell head or trunnion support ing plate 36. In- the modi?ed'rembodiment shown inFigures 5¢~to '7 inclusive, the parts and shapes of the mem bers are substantially identical with those de scribed-in the preferred embodiment. However, the» end liner insert 41' has parallel sides 48’ and 59’ for aisubstantial portion of its length. The » provides the desired; tiltable freedom for ready removal comparing favorably with the, shapesof theinserts >41 (Figures-l to 4) and 41’ (Figures 3O 5 and 6). ' ' Withthe teachings- of the invention described herein, it will be apparent thata very‘simple' end liner expedient has been.» provided to‘ permit the ready removal thereof for replacement and- to provide space adjacent the heads 36' so that the parallel sides 48'—-49' merge with converging shell liners H can also be replaced with ease substantially radial edge portions 48" and 49" and» without‘ entailing; extended time and labor to constitute complements of correspondingly heretofore required to perform these operations. sized and shaped adjacent edges 52’—52" and Various changes may» be made‘ in- the embodi 5'3"'—5 3'i "provided oncomplemental end liner sec 40 ment of the invention herein’ speci?cally de tors 50"'and 5|’. The end liner sectors 50'—5l' that are adjacent to the insert 41’ have. their scribed without departing from the invention or sacri?cing‘ any of the advantages or features edges 5'2»’-53f shaped to correspond with the ad thereof; and nothingher'ein shall be'construed as jacent‘ edges 4’8'--48i" and-4‘9'—49"’ so that in the limitations upon the invention, its concept’ or removal of the end liner insert 41', it is tilted'to 45 structural embodiment as to the whole or any permit the‘ converging side portions 48"—49’ to be displaced from adjacent alignment with the complemental end liner sectors 50'—5I' to vper mit' withdrawal or displacement thereof toward part thereof except as'de?ned in, the' appended claims.’ ' , ' I. In a grinding mill, the combination'with a the center along the parallel edge portions 60 cylindrical’ housing, of‘v end head members de-‘ 52'-53’. tachably connected‘to said housing, means-pro To afford the tilting of the end liner insert 41’ along a su?icient arc to effect the total displace ment of the converging edge portions 48"--49” thereof, a circumferential outer edge 64 of the end liner insert 41' is arcuately curved or bev elled as at 65 to provide the necessary clearance during the tilting displacement thereof to avoid jecting from" said‘ end head members to-rota tively support said housing, non-tiltable comple mental edge contacting end liner sectors detach ably associated with the interior surface of said end head members to de?ne a continuous liner surface, a tiltable liner insert between two end liner sectors and having parallel edges extend contact or abut with the interior surface of the ing for the entire length thereof, and non-tiltable circular head or trunnion supporting plate 36 60 liner sectors adjacent said tiltable liner insert and (Figure 10). In a further modi?ed embodiment shown in non-tiltable end liner sectors, said adjacent non tiltable liner sectors having edges complemental - Figures 8 to 10, one of the standard liner sectors to the edges of said non-tiltable liner sectors and 44" is cut off proximate to their circumferential said tiltable liner insert for facilitating liner re- ' outer ends 64’ to provide short parallel sides 52'” 65 and 53"’ that are shorter or no greater in length than the shortest distance between the interior of the shell 10 and its confronting liner plates ll moval. 2'. In a grinding mill, the combination with a cylindrical housing; of a head closing an end thereof; means projecting from said end head to (Figure 1). Consequently, the dust and pulver 70 rotatively support said housing; a plurality of . complementary shaped end liner sectors extend ing the grinding thereof responsive to the rota ing radially between said housing and said sup tion of the shell II), will not become packed be porting means and disposed in intimate edgev ized substances removed from the articles dur tween the shell l0 and its liner plates ll, even contact with each other; a tiltable liner insert though comparatively small corner openings 66 75 member interposed between adjacent sectors and 2,279,639. in edgecontact therewith, the side edges of said tiltable insert member ‘and the ‘proximate edges of said adjacent sectors having parallel portions, spacedfrom each‘other (a substantial distance tilted‘ upon an 'end edge as a fulcrum, said sec throughout their lengths; a‘ tiltable liner insert member interposed between said spaced sectors in edge contact; therewith, theside edges of said tiltable insert member and the proximate edges tors and said insert member being of correspond ing full length commensurate with the effective of said spaced sectors having parallel portions, whereby said insert member is adapted to be whereby ' said insertmember -- is adapted to be tiltedupon an vend edge as a fulcrum, said sectors radii of said end enclosing head to de?ne a con and said insert member being of corresponding tinuous imperforate and unbroken end liner sur face enclosure for ‘said head to preclude the en 10 full length commensurate With the effective radii of said: end enclosing head to de?ne a continuous trance of substances therebetween, said sectors imperforate and unbrokenend liner surface en and ‘said insert member being incapable of radial closure for said head to preclude the entrance of movement prior to .tilting said liner insert for substances therebetween, said sectors and said removal thereof and» adjacent sectors; and means detachably anchoring said plurality of sectors 15 insert member being incapable of. radial move ment prior to tilting said liner insert for removal and said insert member in the positions named. thereof and adjacent sectors; and means detach 3. In a grinding mill, the combination with a ably anchoring ‘said plurality of sectors and said cylindrical housing; of a head closing an end insert‘member; in the positions named. thereof; means projecting from said end head to 5. In a grinding mill, the combination with a rotatively support said housing; a, plurality of cylindrical housing; of a head closing an end complementary shaped end liner sectors extend thereof; means projecting from said end head to ing radially between said‘housing and said sup rotatively support said housing; a plurality of porting means and disposed in intimate edge complementary shaped end liner sectors extend contact with each other; a tiltable liner insert member having substantial width interposed be- ' ing radially between said housing and said sup porting means and disposed in intimate edge tween adjacent spaced sectors and in edge con contact with each other; a pair of said sectors tact therewith throughout their lengths, the side spaced from each other a substantial distance edges of said tiltable insert member and the prox throughout their lengths; a tiltable liner insert imate edges of said adjacent sectors having par allel portions extending inward fromtheir re 30 member having substantial width interposed be tween ’said spaced sectors in edge contact there spective outer ends, whereby said insert member with‘ throughout their lengths, the side edges of is adapted to be tilted upon an end edge as a ful said tiltable insert member and the proximate crum, said sectors and said insert member being edges of said spaced'sectors having parallel por of corresponding full length commensurate with tions extending inward from their respective the effective radii of said end enclosing head to outer ends, the outer edge of said insert member define a continuous imperforate and unbroken provided with a bevelwhereby said insert mem end liner surface enclosure for said head to pre ber is_ adapted to be tilted upon its outer edge as clude the entrance of substances therebetween, a fulcrum, said sectors and said insert member said sectors and said insert member being in capable of radial movement prior to tilting said 40 being of corresponding full length commensurate liner insert for removal thereof and adjacent sec tors; and means detachably anchoring said plu rality of sectors and said insert member in the positions named. 4. In a grinding mill, the combination with a cylindrical housing; of a head closing an end thereof; means projecting from said end head to rotatively support said housing; a plurality of complementary shaped end liner sectors extend ing radially between said housing and said sup- ' porting means and disposed in intimate edge contact with each other; a pair of said sectors with the effective radii of said end enclosing head to de?ne a continuous imperforate and unbroken end liner surface enclosure ‘for said head to pre :lude thev entrance of‘ substance therebetween, said sectors and said insert member being in capable‘ of radial movement prior to tilting said liner insert for removal thereof andadjacent sec tors; and means detachablyanchoring said plu rality of sectors and said insert member in the positions named. MAXWELL L. RAHNER.