US1212991A - Impact-pulverizer. - Google Patents

Description

R. C. NEWHOUSE.

' IMPACT PULVERIZER.

APPLICATION FILED OCT. 20. 19h.

Patented Jan. 16, 1917.

2 SHEETS-SHEET l.

ATT :11? N EY- R.C.NEWHOUS E.

IMPACT PULVERIZER.

APPLICATION EILED OCT. 20.1911.

,99 1. latvnt'ed Jan. 10, 1917.

2 SHEETS-SHEET 2.

INVENTEI f'ATTEaR m EY BAY C. NEWHOUSE, 0F MILWAUKEE, WISCONSIN, .ASSIGNOR, BY MESNE ASSIGNMENTS, TG ALLIS-CHALMERS MANUFACTURING COMPANY, A CORPORATION OF DELAWARE.

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Specification of Letters Patent. Paflhgntfidl J an. 116, TWWo Application filed October 20, 1911. Serial 110,655,716.

To all whom it may concern:

Be it known that I, RAY G. NEWHOUsE, a citizen of theUnited States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a certain new and useful Improvement in Impact- Pulverizer's, of which the following is a specificationgj J This invention relates to improvements in the construction of rotary impact pulverizersin which raw material is pulverized by being repeatedly subjected to impactwith a series of rapidly revolving beatersor balls.

The object of the invention is to provide a simple and effioient means for taking up the wear on the beatersor bails of impact pulverizers,

such wear resulting from the grinding action of the material on the ends of the bails.

Anotherobject of the invention is to provide a removable wearing shoe or bar adapted for'attachment at the end of the bail, so

that when the shoe or bar becomes worn itcan be replaced by another withoutnecessitating replacement of the entire bail.

A clear conception of several embodiments of the invention can be had by referring to the drawings accompanying and forming part of this specification, in which like reference characters designate the same or similar parts in the difierent views.

Figure "1 is a central vertical section through an impact pulverizer casing showing a series of beaters or bails with removable wearing shoes mounted thereon. Fig. 2 is an enlarged front view of one of the bails'showing a removable wearing shoe or beater portion mounted thereon. Fig. 3 is a side view of a modified form of bail at tached to a suspension member. Fig. 4: is a front view of a modified form of bail having a removable wearing bar or heater portion mounted thereon. Fig. 5 is a-front view of a modified form of'bail or beater portion constructed of one piece. Fig. 6 is a side view of a suspension member having ings formed in the casing and has a suspension member 8 fixed thereto at a point lntermediate the shaft bearings.

The beaters or bails 10, 11, 12, are suspended from a series of pivots 13, which are fixed to the suspension member 81 The liners 3, 4, 5, are

fixed to the cover 2 of the casing and have ing and permit the free discharge of: pulverized material from within the pulverizing chamber.

. Thebeaters or and 2, are provided with removable beater bails 10,11,12, see Figs. 1 l

portions or wearing shoes 14:, these shoes b'eing fixed to the ends of the bails by means of dovetails 15 coacting in similarly formed recesses or slots in the ends of the bails, The dovetails 15 and the, slots in which they coact, extend along the entire length of-the shoes 14 and bails 10, 11,12, the members being locked together by means of vpins 16,. which pass transversely through the said shoe and bail. The locking of the shoes to the bailsis insured by so. inserting the pins 16 that one half of the pin extends above and the other half below the plane of coaction between the shoes and bails." The portions of the beaters or bails 12 not including] the wearing shoes are off-considerably less length, measured radially of the rotor, than similar portions of the heaters or-bails 11,

while corresponding portions of the bails 11 are of considerably less length, measured; rad ally of the rotor, than corresponding portions of the bails 10. The overall radial lengths of the bails with thewearing shoes attached, are, however, the same, so that the radial distances from .thecenters ofthe sus pension pivotsl3 to the center of the shaft 9 are equal. It will thus be noted that since the lengths of the bails 10, 11, 12 are different, and the distances from the centers of thesuspension pivots 13 to the center-of and liners. y

In the modified form of bail disclosed in Figs. 3 and 4, the pivots 13 are equidistant.

. 6,0 mvolute lmpact surfaces formed thereon,

loothe shaft 9' are equal, the thickness of the from the shaft center. Each of the bails 100, 101, 102, comprises a palr of radlally v extending eye-bolts the outer ends of which have screw threads 150 which coact in screw .are secured to the outer endsof the bolts 102 are considerably thicker, measured radially of the rotor, than the bars 141 securedto the outer ends of the bolts 101,

while the bars secured to the bolts 101 are' considerably thicker, measured radially of the rotor, than the bars which are secured to the endsof the bolts 100.-

In the modified form of the invention disclosed in Figs. 5'. and 6, beaters or bails 110, 130, 120 are formed. with the wearing bars integral with the arms, the lengths of the bails, measured radially of the rotor, being different. The entire bail in this case forms the beater portion.v The Wearing bar 140 of the bail 110 is considerably thicker-,1 f measured radially, than the wearing bar 140 of the bail 130, while thewearingl bar of the bail-130 is considerably thicker-[than ther the bars 141, however,

bar of the bail- 120. ln ordertoretain equal distances from the..center shaft tothe outer extremes'of the bails, --the distances from the centers of the pivots 13 to the shaft center are different-.- The bail 110'has its pivot -nearer to the shaft center than the bail 130,

while the bail 130 is mounted nearer to the shafficente'r than the bail 120.

During the operationof the p'ulverizer, theshaft 9 and suspension member 8 are given a rapid rotarymotion carrying with them thebeaters. 10, 11, 12. The raw material to be pulverized is admitted throughwith the material, of the material between the screen bar 7 and 3 the inlet portion or hopper l of the caslng and falls directlycinto the circular path of the moving bails. The rapid motion of the beater portions which traverse a circular path, causes the material to be thrown by the impact and-by the action of centrifugal force, against the involute surfaces of the liners 3, 4, 5. The material after striking' the involute liners is returned to the path of the beater portions, from which it is again thrown against the liners. The successive outward throwing and returning of the' material from' and to the beater portion -path continues until the material is sufiiciently pulverized to be drawn by suction from Within the pulverizing chamber through the discharge screen. Due to the successive impacts of the beater portions 14 and also due to grinding the ends of th'e'bails, the beater portions bar.

eventually become worn, causing the existence of a greater space between the ends of the bails and the screen bars 7. This increase in the width of the space between the ends of the bails and the screen bars causes the discharged product to become coarser, necessitating a means for outwardly adjusting the beater portions.

In the form of the invention disclosed in Figs. 1 and 2, the adjustment for wear is made by removing the worn shoes 14 from one of the bails and inserting the same in the next longer bail. For instance, as the shoe 14 of the bail 12 becomes worn, it is removed and inserted in the next longer bail 11, a new shoe 14 being inserted in the end of the bail 12. The shoe 14, removed from the bail 11, is insertedin the next longer bail 10, while the shoe 14, formerly attached to the bail 10 afterhaving been worn, being. unfit for further use, is discarded. In this way it will be seen that the shoes 14 can be completely utilized and that the parts subjected to. wear can be easily replaced without renewal of the entire bails.

closed in Figs. 3 and 4, the progress of the wearing bars. 141 is similar to that of the -wearing shoes 14 as disclosed in Figs. 1 and 2, the method of attaching and removing differing. The bars 141 are removed from their respective eyebolts by removing the entire bail from its pivot and unscrewing the eye-bolts from the With this construction it will be apparent that each of the suspension pivots 1'3 automatically and effectively locks the screw-threaded ends of the eye-bolts which form the means for securing the eye-bolts to the beater bar, against displacement since the pivot besides forming a means for swingably suspending the bail, also prevents relative rotation 'of' theeye-bolts and the attached wearing shoe or beater portion. It will be noted that the bars 141 can be attached to pairs of eye- bolts 100, 101, 102, of suitable lengths, thereby again permitting complete utilization of the bars 141 and replacement thereof, without necessitating renewal of the eye-bolts.

In the modification of the invention as disclosed in Figsf5 and 6, the bail 110 is advanced to a pivot which is mounted farther away from the shaft center, after its corresponding impact bar 140 has become worn, the bail 130 constituting the worn bail in its new position. After the bail 130 has become worn, it is advanced to a pivot having a still greater distance between its center and the center of the shaft, the bail'120'constituting the advanced'bail in its new and final position. After the bail 120 has become further worn, it is unfit for further use.

With these constructions of bails itwill be seen that a simple and eiiicient means for maintaining the proper fineness of the discharged material is obtained. It will also be seen that the greatest amount of service possible is to be had from the bails. With the construction as disclosed in Figs. 2 and 4:, the heater portions 14, 141, can he made of any desirable material, as, for instance,'tool steel, without necessitating the construction of the bails and bolts 101 of a similar material. Themeans of attaching the beater portions in each of these two. constructions is also simple and efficient and permits ready removal of the beater portions.

By arranging the heaters of the several series so-that diametrically opposite heaters are-of substantially like thickness, the impact rotor may be maintained in a substantially balanced condition at all times.- Such balancing of the rotor is desirable due to the high rate of revolution thereof which is necessary in order to produce most efficient pulverization. If the rotor is notsuhstantially balanced, undesirable vibration of the machine results; The provision of several series of heaters of different thicknesses also permits gradual renewal of the Worn out heaters, two at a time, without necessitating simultaneous renewal of all of the heaters. If all of the-heaters are renewed at the same time and allowed to remain in their ,initial. position until they: are completely Worn out, there will he considerabledifierence between the clearance at the ends of the heaters at the time of renewal thereof and the clearance existing just preceding discarding of the worn out heaters. This difference in clearance would produce .con-

siderable difference in the fineness of the material discharged from the pulverizer a diiferent times. v v

It should be understood that it is not desired to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person nally of said shaft, and'the bars of successive heaters being of diderent thicknesses;

' 2. In combination, av rotary element, a

pair of arms each having a threaded end, a pivotfor suspendlng said arms from said element, and a heater having threadedsockets. engagingsaid threaded arm ends, said pivot serving" to lock said arms against movement relative to said heater.

3. ln 'comblnatlon, a rotor'comprlsing a being of substantially like thickness.

4. In combination, a rotor comprising several series of heaters, each heater comprising a plurality of spaced suspensionarms and a bar secured to said arms, the bars of successive heaters of each series being ofdifi'erent thickness, and diametrically opposite heaters of said rotor-being of like thickness.

In testimony-whereof, the signature of the inventor is'aflixed hereto in the presence of two. witnesses.

RAY o. NEWHOUSE.

Witnesses:

CHAS; L. BYRON, W. H. LIEBER.

plurality of heaters of progressively'difl'erent thickness, diametrically opposite heaters

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