Патент USA US2128468код для вставки
iii-tug. 30, 1938. s, L_ MLL'ER _ 2,128,468 END LINER FOR GRINDING MILLS Filed Sept. 9, 1955 2 Sheets-Sheet i 3 r 4/495 1N VENTOR. 2 Swen/5L. MALE/e ‘7 6 ~ V; giEB’AJIORNEY. ~ Aug. 30, 1938. s. L. MILLER 2,128,468 END LINER FOR GRINDING MILLS Filed Sept. 9, 1955 2 Sheets-Sheet 2 I mVENmR ~57HPKSL. MILLEE.’ ATTORNEY. 2,128,468 Patented Aug. 30, 1938 UNITED '- STATES FATE NT OF F I'QE 2,128,468 END LINER FOR GRINDING MILLS Starks L. Miller, Denver, 0010., assignor to Amer ican Ball-Mill Company, Denver, 0010. Application September 9, 1935, Serial No. 39,762 3 Claims. This‘ invention relates to improvements in grinding mills of the type employed in grinding ores and the like, which employ attrition bodies such as balls or rods. The invention relates more 5 particularly to the construction of the end liners and the means for securing them in place. The principal object of this invention is to provide sectional end liners, throat rings and ball retainers that are individually removable without disturbing the other sections. Another‘object is to provide a simple means for holding the sections in place and which can be readily released for the purpose of permitting the removal of the sections. 15: A further object is to provide means for secur ing sectional end liners, ball-retainers and throat rings in place in a grinding mill by the employ ment of radially acting forces. The above and other objects that may appear 20 as ‘the description proceeds are obtained by means of a construction and an arrangement of parts that will now be described in detail and for this purpose reference will be had to the accompany ing drawings in which the invention has been illustrated, and in which Figure 1 is a view, partly in section and partly in side elevation, showing a grinding mill con structed in accordance with this invention; Figure 2 is a section taken on line'2—'2, Figure 1, looking toward the discharge end of the mill; Figure 3 is a section taken on line 3-3, Figure 1, looking toward the'intake trunnion or the-feed end of the mill; Figure 4 is a View, partly in section'and partly ' in elevation, looking in ‘the direction of arrow 4', Figure 5; _ , Figure 7 is a section taken on line 'l—'l; Fig ure 5; Figure 8 is a section taken on‘line‘ 8—8, Fig ure 9; ' Figure 9 is a section taken on‘line 9—9, Fig— ure 8; Figure 10 is a section taken on line I il-lli, Figure 9; Figure 11 is a section, taken on line 'lZ-IZ, Figure 12; the shell are a number of channelled girders I2, arranged in spaced parallel relation with the web toward the inside and the edges of the ?anges in contact with the shell. Liner sections l3 are 1|) supported on the girders and held in assembled and spaced relation by means of curved wedges l4. Since the invention here relates more particu larly to the construction of and the method of securing the end liners, throat ring and discharge ' grate in place the construction of the side liners will not be further described. Referring now more particularly to Figures 1, 2 and 3, it will be seen that abutments I5 are secured to the inner surfaces of the heads. The abutments may be rings, which are secured in place by welding or by bolts or rivets, or they may be formed from a number of separate sec tions secured in place by similar means. It will be observed that the inside edges of the L abutments are beveled so as to provide an under cut surface, as shown most clearly in Figure‘ 9. At the inner end of the intake or feed trunnion 8 a sectional throat ring is provided, which‘ con— sists of a plurality of sections 16. In 'the‘example illustrated the throat ring is formed from four sectors each of 90° angular extent. The outer surface of each sector i6 is provided with an out wardly facing beveled shoulder which is so posi tioned that it will engage the inside of the abut- . ments in the manner shown most clearly in Fig , Figure 5 is a‘ section taken on ‘line 5-—'5, Fig ure 4; Figure 6 is .a section ‘taken. on line 6--6, Fig~ ure'5; nates the shell, numerals 6 and l the headsv at the intake and the discharge end respectively, and numerals 8 and 9 designate respectively the in take and the discharge trunnions. The trun nions are mounted for rotation in bearings Ill 5 carried on suitable supports ll. Located within ‘ Figure 12 is a section, taken on line H-Ii, Figure 11;‘ Figure 13 is a section taken on line I3—l3, Figure 11. In the drawings referencev numeral 5 desig ure 9. The radial surfaces of the sectors [6 are pro vided with curved tapering grooves for the recep tion of curved wedges l8 whose wider‘ ends ‘are toward the inside as shown most clearly in Figure 8. The sectors l6 are of such size that they‘can be put into position and then moved radially until the shoulders I? engage the cooperating beveled shoulders of the abutments. After the , blocks or sectors l6 are properly positioned, the wedges l8 are inserted and‘ driven home until the pressure of the shoulders I‘! against the abut ments is su?icient to hold the sectors in place. At the inner end of the discharge trunnion 50 9 a sectional ball-retainer is positioned and held in place by means substantially identical with that employed with the throat ring. The ball retainer has been shown as comprising four sec tor-shaped parts IQ of a transverse ‘section-like 55 2 2,128,468 that illustrated in Figure 5. Each part I9 has an outwardly directed shoulder I‘! while adjacent radial sides have curved tapered grooves for the reception of the wedges I8. _ UI From Figures 1, 2 and 3 it will be seen that the inside of the discharge head ‘I is provided with a plurality of truncated triangle-shaped liner sec tions 24, whose shape and the manner of securing them in place is most clearly shown in Figures 4 10 and 5. It will be seen from Figure 4 that the end liner sections are so positioned that the sides lie in radii bisecting the girders I2 and that their bases are therefore formed from two straight sections b and 0. short An elongated wedge 25 is secured transversely of each girder and serves as an abutment for the straight end walls b and c of adjacent sec tions 24. The opposing sides of adjacent sections are provided with tapering arcuate grooves for the reception of the curved tapering wedges I8. In order to enhance the holding function of keys I8 throughout the maximum period of wear on the liner sections 24, the heads 5 and ‘I are provided with pockets 38 as illustrated in Figures 5, '7, 9 and 10. The liner sections 24, 23a and 2% have ?anges 3|, 3Ia and 3Ib respectively which extend into the pockets 30 when the keys I8 are driven into the grooves. It will be noted in Figure 5 that the keys I8 extend through the grooves to a greater depth than the normal thickness of the liner sections 24, indicated by the dotted line. From the foregoing, it will be apparent that no matter how thin the end liners wear, there will be enough of the key IS in the grooves within the flanges 3i to prevent the sections from sep arating. to each girder near its end, the base of each liner section 24d is provided with a curved tapering groove for the reception of a correspondingly curved tapered wedge I8b which is positioned between the lug 26 and the inside of the head. The wedge I8b is somewhat conical, and the groove in section 2401 is similarly inclined with the result that when the wedge is driven home the resultant force will be along line 0-b- and tends to force the sections against the inside of 10 the head. It will be seen from the above description that the parts are held in place by a radial force which acts to expand the throat ring, the grate and the end liners, radially against abutments hav ing beveled edges, which abutments have been indicated by numeral I5. The curved wedges employed for holding the end liners in place have been designated through out the several views by numeral I8 as they are all alike except as to size. Throughout the claims the words “liners” and “liner sections” will be employed in a sense broad enough to include the throat ring and grate sec tions as well as the other liner sections, as the ~ several kinds of liners are all secured in place in the same way. Attention has previously been called to the fact that the abutments may be rings or a plurality of separate sections arranged in the form of a 30 circle and therefore whenever the expression “an nular abutment” or “ring abutment” is used, it is to be, understood as including the equivalent thereof. Having described the invention, what is claimed as new is: readily be removed, thereby completely releasing 1. In a grinding mill, a shell, a head at an end thereof, an abutment on the head, the abutment having an undercut shoulder, a girder on the shell, a lug on the girder spaced from an end 40 thereof, a liner positioned between the girder and the abutment, the liner having a beveled shoulder for engaging the undercut shoulder on the abut ment, there being a groove in the liner, and a spreader positioned in the groove and engaging the girder between the lug and the head for producing a force urging the shoulders into en the section. gagement. When the sections are positioned as shown in Figure 4, and separated by the wedges, the end "I O walls I) and 0 will be forced radially against the wedges 25 and the end liners will thus be securely held in place without the use of bolts; the wedge 25 having its inner edges so beveled as to under cut the adjacent liner. When an end liner section - is to be removed a wedge at one side is driven out after which the wedge on the opposite side can The liners on the inside of head 6 are somewhat differently formed and are held in place by spe ci?cially different means, all as will now be de scribed. The liners of head 6 are each formed from two parts 24a and 2%, which together equal one liner 5.3 24. The abutment or abutnients Ida have both the inner and outer edges beveled, in the manner shown in Figure 9, and the girders have wedges 2. A grinding mill having a shell, a head at an end thereof, the head having a trunnion, liners for the head, comprising a central portion formed from several parts, each part having a portion extending into the trunnion and another por tion projecting over the surface of the head im mediately surrounding the trunnion, an abutment 1 von the head adjacent the trunnion, having its inner edge undercut, the liners having outwardly 25 secured thereto the same as in Figure 4. The bottom side of section 24a and the top of section (10 24b are provided with cooperating curved taper ing grooves for the reception of a curved wedge I8 which serves to force the inner end of section 24a against the outer edge of the abutments [5a and the outer end of section 241) against the (S5 wedge 25. In Figures 11, 12 and 13 another way of se curing the liners in position has been shown. The abutment I5a has been illustrated as a ring hav ing both its inner and its outer edges beveled. facing shoulders inclined to ?t the shoulder on the abutment, means for expandingthe liner as sembly to force the shoulders thereof into inter GI) locking engagement with the shoulder on the abutment, a second abutment means positioned - This ring is secured to the head in any suitable way and instead of being a continuous ring as locking engagement between the shoulders. 70 3. A grinding mill having a substantially cylin drical shell, a head for closing one end thereof, shown, may be formed from a plurality of seg ments. Instead of the wedges 25 shown in Figure 9 a curved or segmental shaped lug 26 is attached adjacent the periphery of the head, the inner edge of the outer abutment means being undercut, a plurality of liners positioned between the two abutments and provided with outwardly directed shoulders shaped to engage the undercut shoul der on the last-mentioned abutment, and means for expanding the liner assembly to secure inter~ the head having a tubular trunnion, liners for the inside of the head, the liner comprising a central portion formed from several sector-shaped 76 2,128,468 parts, each part having a portion extending into the trunnion and another portion projecting over the surface of the head immediately surrounding the trunnion, an annular abutment attached to the inner surface of the head in concentric ar rangement with the trunnion, the abutment hav ing both its inner and its outer edges beveled and undercut, the liners having outwardly facing shoulders inclined to fit the shoulder on the inside 10 of the abutment, means for expanding the liners to increase its diameter and force the shoulders thereof into interlocking engagement with the inner shoulder on the abutment, a second abut ,ment means positioned adjacent the periphery 3 of the head and spaced from the ?rst abut ment, the inner edge of the outer abutment means being beveled and undercut, a plurality of two part, truncated, sector-shaped liners located in the annular area between the abutments, each part 5 of the liners having a shoulder facing the under cut shoulder of the adjacent abutment and wedge means interposed between the two parts of each liner for expanding the annular liner assembly radially to secure engagement between the shoul ders of the abutment and the shoulders of the liners. STARKS L. MILLER.