US2254425A - Crusher - Google Patents

Description

Sept. 2, 1941. A. w. FAHRENWALD' 2,254,425

CRUSHER Filed May 28, 3958 ARTHUR W. FAHREAVWAL D (Ittomeg Patented Sept. 2, 1941 om'rE-o- STATES? one-snare W h U 7 Arthur W. Fahrenwald, Moscow, Idaho; Application May 2 1938, Serial o l-210x155 3 Claims, (o 1. ss--1o)- The prima obiect of the inven ion is prove crushers of. this time in, certain respects toin'sure a simple construction, stab lity and durability of parts, and smooth operation of the gyratory crushing unit, Anjadit zone for c ar material and an exit. zone for the finer material are provided between the. gyratory head and h stationary concave, and means are. provided for accurately and conveniently adjusting the concave with relation to the gyratoryhead,;in order that the crushing capacity of the adit zone and at. of the exit zone maybe equalized to..- insur uniform feed and passage of the 'material through the crushing mill.

To insurea maximum degree of stability for the floating gyratory unit a long-bearing extending substantially'the length of the, central spindie, is provided and in which the eccentric sleeve is journaled with, the spindle, and the latter is laterally braced and supported so. that the gyrating head may have an efieetive, rolling contact with the material to be, crushed,

Due tothe combination and arrangement of parts of the gyrating unit means are provided for freely lubricating the parts against. wear andfor constantly circulating the lubricant or oil in con tact with the bearings, of working parts.

The invention consists in certain. novel c,ombi-' nations and arrangements-of parts as willhereinafter he more fully set forth and claimed. In the accomp nying drawing I have illustrated one complete example of the physical embodiment of my invention wherein the parts. are combined and arranged according to one mode I, have thus far devised for the practical application of the prini ciples of. my

invention. It will be und rstood that changes and alterations may be made in these exemplifying structures, within the scope of my appended claims, without departing from the principles of my invention.

Figure l is a vertical sectional view of, a crushing mill embodying my invention.

figure 2 is a view in side. elevation of the gymtory crusher with its integral spindle and floating base plate or disk.

. Figure 3 is a'horizontal sectionalview through the frame of the machine, thebearing sleeve, the

eccentric bushing and the spindle, and showing also the driving gears for the eccentric bush- In the assembly view Figure 1 it Willbe seen that the base I is fashioned. with, integral uprightcylindrical frame z, and; an inner concentrically spaced shell 3, and in Figure 3 spaces 4, 4, are provided between the frame and the shell for the discharge of the crushed material. At the upper end of the cylindrical frame, a cylindrical head 5 is provided, and this head is threaded at 5 on the exterior of the cylindrical frame 2 to an approximate adjustment for the frame in position for use.

may readily be made, and partsmay. with facility be removed for repairs or replacements, by

and the frame-head. The frame-head is accurately and preciselypadiusted on; the frame through the, use of a series'of adjusting'bolts 6 that are threaded through bolt holes in the annular top flange 6' of the frame-head, with their lower ends bearing on the top edgeof the frame 2. Through the use of the threads 5' and the ad'- justing bolts 6, the frame-head is properly adjustecl', and then the bolts 6 are locked in place by means of lock nuts 1 on the bolts turned up tight against thebottom face of the flange 6.

The frame-head is also provided with aniliner annular flange 8 depending within the frame-head and spaced concentrically therewith, and this depending flange is fashioned with a tapered face to receive the concave 9 which forms the stationary jaw of the crusher. As indicated in Figure. 1 the. concave fashioned with an upper tapered sloping face 10 and a lower outwardly flaring tapered slope H, and these sloping faces or stationary jaws, together with the gyratory crushing head, form an adit' zone. fOr the reception of coarse material, and an exit zone for the discharge of the crushed or finer material, the coarse material being fed to. the

edit zone through a circular collar 2 that projects upwardly from, the concave and oo-acts with a suitable hopper for feedingthe material to the mill.

, 'I' econcave is adjusted and rigidly suspended in the, frame-head, and it is, retained in place through means that are readily accessible and may be manipulated with facility. For this purpose a series of holes [3 are provided in the collar I2 of the concave, and. radial locking levers M are disposed aboutjthe, concave. with. their inner ends protruding. into or through the holes. The levers are supported. on fll cllln'lsv l5 located on the top edge of the flange, 8 of the. framehead,. and verticallocking'bolts is. are passed through holes inthe flange B and complementary holes in the outer ends; of the levers, The bolts are entered up through the flange-holes with their heads l'l bearing against the underface of the flange, and tightening or look nuts iii, are

threaded on the ends of the bolts as they protrude throughthje lever holes. Thusby turning home the nuts on the bolts the concave is drawn up into position in the flange S-and rigidly seated Repairs or replacements loosening the nuts and withdrawing the supporting levers. r ll The floating gyratoryis; mountedcent-rally of, and below the concave, and as .Seen in Figures 2 and 3, the fr'usto-conical crusher-head i9 is fashioned with an integral spindle having two journals 2!] and 2| of differing diameters the heavier or larger journal 20 integral with the head, and the other'journal being materially reduced in diameter. On the face of the frustoconical head is mounted a complementary wearmantle 22 secured to the head by means of a crown-bolt 23,.and the working face of the mantle is stepped to form'concentric annular bands as 24, and steps between the bands. The crusher head has a rolling contact with the material in vent choking in both the adit zone. and the exit zone. Thus the coarse material fed to theadit zone is successively crushed to a finer size as it A passes through the two zones, and the fine-s eventually are discharged through the vertical channels or spaces 4 of the frame.

At its lower end} the spindleis provided with a floating foot-platefor .disk25 having a socket 26 mounted'on a reduced end. 21 of the spindle as shown indotted lines. The disk is fashioned with a semi-spherical lower face, the curve of which is struck from" a' center located above the crown of the gyratory crushing head, and this face rides or gy'iatesqwitha floating movement over a complementary concave face in the base or bearing plate '28 that is located at the bottom of the main frame and boltedat 29 to the base I of the framef I. Y

'The'locus of radii'of the spherical thrust bearing ma's coincide with the center of gyration or neutral point of the spindle and it may or may not be at the apex of the gyrating'cone. That is, it may be somewhat above for below this point but generally it should be nearly on the apex of said cone. 1

The spindleis supported in a bearing sleeve 30 havinga lateral flange 3| that is rigidly bolted on the top edge'of the shell'2, and a housing 32, exterior of the 'fsleeve is provided with a bottom flange 33' that is seated in a complementary groove in the top face of the'flange'3l the housing being designed as a dust-guard to prevent access of dust to the lubricated parts of the gyrating unit.

The housing 32 serves also" to collect the lubricating oil pumped up between the bearing sleeve 30'and 34 and between 341andthe spindle housing 32 'andlserves to catch the oil thus pumped and return it through ports opening into' the oil well49.

' Within the bearingsleeve is journaled a rotary bushing 34 having two'eccentric, bores 35 and 36 complementary to 'theitwodiameters of the 'spindlethat is" encasedby'the bushing, and a usual liner 3'! is interposedbetween the bushing 'andthe bearing sleeve;

At its lower end, just below the l'oweren'diof the bearing sleeve, the bushing is fashioned with an exterior flange 38 which is'bolted to a horizontally disposed gearing or gear ring 39,' and this ring rests upona bearing plate.or gasket 40 that is seated on the bottom bearing ring that supports the bearing member 'or bushing of the spindle.1'The bottom bearing, 4|, as shown is bolted to'the base of thejframe by bolts 29, and this bearing: ring, which overhangs the fi oatingjbase plate or disk 25, forms a support at the lower end for the-eccentric bushing 'With'the spindle free to revolve or "rotate in the bushing as it partakes of the gyratory movement created by the rotating eccentric bushing. j fj f l The driving mechanism-forthe crusherincludes a'pinion-42 in'mesh with thegear ring 39, and

drive the gyratory crusher unit:-

Lubricating oil under pressure is supplied the adit and exit zones, and these steps retard 1 through the inlet pipe 48 to the oil well 49 in the downward movement of the material to pre which the floating disk 25 gyrates, and by means of vertical and lateral oil ducts as 50 the lubricating oil'is'circulated through and around the journalbearings, and into the oil chamber 5| in which the gear' ring and pinion are enclosed. An outlet pipe 52 from th oil chamber 5| disposes of theused oil in suitable manner.

From the above'descriptiontaken in connection with 'the'drawingthe construction and operation of the crusher will be apparent, and the advantages of the compactly arranged, easily adjusted parts, togethei-With'the lateral bracing of the gyratory unit will also be, clear.

' Having thus'jfully described my invention, what lcljaim asfnew andj'desire'to secure by Letters Patent isz' '3 I 1. In a crushing mill, the combination with a main frame, having" an inner shell, and an upri'ghtflbearin'g sleevemounted on and projecting above and below the top of the shell, of a rotary bushing mounted and extending the full length of the sleeve, sai'dbushing having two bores of differing diameters eccentrically arranged therein," a spindle journaled inthe eccentric bores, and

having a crushing head integral therewith, a spherical convex lbearing dismmounted on the lower end' of 'fthe."spindle, and'having a center of curvature adjacentjthe neutral point of. the

spindle and aboveithe crushing head, a, bearing support "for the disc, and means for revolving the bushing. I

' 2. In a crushingmill, the combination of a main frame, an inner frame shell'having a supporting flange, a centrally disposed bearing sleeve havingan exterior fian'gem'ounted on said sup- 'sleeve, a bushing ha ving' an eccentric bore and journaled in'said sleeve, said bushing having a ring gearrigid with its lower, end below the 'sleeve', a"bearing ring 'mou'nted in the frame to support said ring gear, a drive pinion engaging said ring gear andincluding means for rotating same, a spindle journaled in'theeccentric bore and having a crushing head integral therewith,

"a spherical convex bearing disc mounted on the lower end of the spindle and having a center of curvature adjacentthe'neutral point of the spindle and above-the crushing-head, and a complementaryispherical concave bearing support for ddi n

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