US1654638A - Crushing and separating apparatus - Google Patents

Description

Jan. 3, 1928. 1,654,638

1 P. L. CROWE nausm AND} SBPARATI'NG APPARATUS Filed Oct. 20, 1925 5 Sheets-Sheet 2 Jan. 3, 1928.

P. L. CROWE CRUSHING AND SEPARATING APPARATUS Filed 0011.20, 1925 3 Sheets-Sheet 3 Patented Jan. 3, 192

UNITED STATES" PAUL CBOWE, OF BALTIMORE, MARYLAND.

CRUSHIN G AND SEPARATIN G APPARATUS Application filed October 20, 1925. Serial 1%. 63,743.

This invention relates to mills for grinding and Separating ores, coal and similar materials and is directed more particularly to a mill similar to that disclosed in my co- 6 pending application filed of even date.

The primary object of thepresent invention is to provide a particularly simple and highly eflicient form of apparatus for effecting a crushing and grinding of the material and simultaneously separating the impurities, the lighter or finely divided particles, and the heavier or larger particles each from the other.

Another objectis to provide an apparatus of this general character which shall employ a centrally disposed rotary fan member and oppositely "and axially extending grinding units, there being one or more crushing. elements mounted for oscillatory movement adjacent the grinding units to effect a preliminary crushing of the material as it is fed thereto. 7

-A further object is to provide an apparatus of the aforesaid character which shall employ pneumatic means for separating the lighter or finely divided material from the heavier or coarser material and which shall employ magnetic means for separating the ferrous impurities therefrom.

A still further object is to provide an apparatus which "shall be simple in construction, inexpensive to manufacture, and which shall be highly eflicient and durable in'operation.

With these and other objects in view, the invention may be stated to consist in the various novel features of construction and arran em'ent or combination, all of which will e fully described hereinafter and pointed out in the appended claims.

In the drawing accompanying and forming a part of this application:

Figure 1 is a longitudinal sectional view with parts in elevation, of an apparatus embodying my-invention;

Figure 2 is a vertical sectional view taken on the line 2-2 ofFigurel;

Figure 3 is a top plan view of the apparatus;

Figure 4 is an elevation of the rotor element removed from the base and showing a modified form of grinding unit associated therewith;

Figure 5 is a vertical sectional view taken on the line 5-5 of Figure 4;

curvature of the fan blades.

Describing the various parts by reference characters, and referring particularly to Figs. 1-3, inclusive, 1 denotes a suitable base which is formed with a series of upwardly extending pillars 2 and 2, the latter pair defining a central and transversely disposed opening 3. The upper end of each pillar 2 is substantially semi-circular in cross section and is provided with oppositely extending lugs 4 on the sides, thereof, A cap 5 also semi-circular in cross section is adapted to fit on the top of each pillar and these caps are each' formed with oppositely projecting lugs 6 that are adapted to align with the aforementioned lugs 4 to receive bolts 7 or other suitable fastening means.

Positioned between each pillar 2 and its cap, is an anti-friction bearing 9 which rotatably supports a fan housing 10. Arranged within fan housing 10 are a series of fan blades 11, 12 and 13 that are separated from each other by partitions 15 and 16. Fan blades 11 and 13 are each curved in the same direction to produce a suction from the center of rotation thereof while the fan blades 12 are curved in an opposite direct-ion to create a. pressure at the center of rotation.

Pa'rtition'slfi and 16 each merge at the center with a tubular shaft 18 and these shafts extend in diametrically opposite directions through the cylindrical openings defined by the aforementioned pillar blocks and caps. As shown in-Figure 1, fan casing 10 also merges oneachside thereof with an axially extending'hollow shaft 19 which is arranged concentrically with respect to shafts 18 and spaced therefrom by radially extending ribs 20, the shafts 18 and 19 forming what I shall term a double hollow shaft. Fastened to each hollow shaft 19 by screws 21 or other suitable fastening means are a plurality of longitudinally disposed grinding plates 22 which are formed with aplu- Ill) rality of apertures 23 that align with apertures 23 in shaft 19 to define a series of frusto conical shaped openings.

Disposed about each grinding cylinder are a pair of crushing and feeding plates 24 and 25. These plates are preferably identical in shape so as to facilitate production and replacement. Each plate, as shown in detail in igures 8 and 9, is formed with a side wall 26 having an offset portion 27, and with a side wall 28 which lies entirely within one plane. When placed in operative relation, as shown in Figure 8, a side wall 28 of one plate will engage with the offset portion 27 of the other plate. Each plate, adjacent the lower end is also formed with a depending cam yoke 29 which is adapted to straddle a cam 30 that is carried by the aforementioned hollow shaft 19. In practice, I preferably form the yoke with a slightly greater distance between the legs thereof than the eatest diameter of the cam and provide each leg with an adjustable wear plate 31 to take up wear and also adjust the degree of oscillation of the crusher plates.

One of the crusher plates of each pair is provided on one side wall with a pivot pin,

32 which is formed with a spherical outer extremity 33, and in the other side wall there is formed a notch 34 so that when a pair of plates are assembled, the pivot pins will engage in the respective notches to pivotally connect said plates. Each pair of crusher plates is supported in operative relation to the grinding cylinders by the aforementioned spherical extremities 33 engaging semispherical seats 35 in the cafps 5 as clearly shown in Figure 1. I pre rably interpose springs 36 between suitable projections 37 on the caps 5 and each side of the spherical extremities 33 as shown in Figure 2 so that during operation of the crusher plates, a lump of the material being ground or im- ,purity which is too hard to be broken would not cause serious injury to the apparatusbut would permit the plates to separate against the tension of such springs andthen return to normal position.

In operation, power is applied in any suitable manner (not shown) to rotate fan cas-- ing 10 and grindin cylinders 22. The material to be ground is introduced between each pair of crusher plates and rotation of cams 30 will cause the crusher plates to oscillate and thereby effect a preliminary crushing of the material and also serve to feed it to the grinding cylinder 22 where it will be round and reduced to a finely divided con ition. Meanwhile rotation of the fan mechanism will cause blades 11 and 13 to create a suction through apertures 23 and 23 in the cylinders and hence withdraw the finely divided material to the space between hollow shafts 18 and 19 and thence into fan casing 10. Fan blades 12 will receive the finely divided material and eject it throughthe tubular shafts 18 to any desired point of destination. The material which is too large to be drawn through apertures 23 and 23 drops'by gravity to one side of a partition late 40 extending between each pair of pilars 2 and '2 and may be removed from time to time. I preferably magnetize the grinding plates 22 so that any ferrous impurities fed thereto will adhere until they reach the lowest point of rotation of the rings and start upwardly whereupon they will drop tition plates 40. Y

In Figs. 4 and 5, I have shown a modified form of grinding cylinder wherein the plates 22 about the outer hollow shaft 19 and the apertures 23 in said shaft are arranged intermediate adjacent plates. The construction is otherwise identical with that previously described.

In Figs. 6 and 7, I have illustrated a further modification wherein each of shafts 18 is formed with a pluralit-y of radially extending ribs 42 that are adapted to receive and support a plurality of grinding rings 43 by gravity to the other side of parare spaced apart circumferentially in communication with the space between adjacent ribs 42. This arrangement of aper tures 44 permits only finely divided material to enter therein and the shape thereof prevents clogging. In this instance it will be noted that shaft 19' is dispensed with and the rings 43 carried by ribs 42 define the outer hollow shaft. In other respects, the apparatus is identical in construction and operation and the same reference characters apply as in the other figures.

What I claim-is 1. A grinding and separating apparatus of the character set forth comprising a base. a fan casing carried b said base. a plurality of fan units arrange within said casing. a conduit projecting from each side of said fan casing, and grinding cylinders arranged concentric with each ofsaid conduits.

2. A grinding and separating apparatus of the'character setforth comprising a base,

a fan casing carried by saidbase, a plurality of fan units arranged within said casing, a conduit projecting from each side of said fan casing, a grinding cylinder associatedwith each of said conduits, and crushlates disposed in operative relation to grinding cylinders. I A i ding and separating apparatus of the character set forth comprising a base,

afan casing carried by said base, a phi-- rality of fan units arranged within said casing, conduits extending from each side of outer of said casing, and a grinding cylinder associated with each of said conduits, said grinding cylinders having air passages communicating with said conduits. I

4. A grinding and separating apparatus of the character set forth comprising a base, a fan casing carried by said base, a lurality of fan units arranged within sai casing, a pair of concentricallydisposed conduits extending from each side of said casing, and grinding elements associated with the outer of eachfof said conduits, said grinding ele- =ments having air passages communicating with said outer conduits.

5. A grinding and separating apparatus of the character set forth comprising a base, a fan casing carried by sa1d base, a plurality of fan units arranged within said casing, a pair of concentrically disposed conduits extending from each side of said casing, a grinding cylinder associated with the each of said conduits, said grinding cylinders having air passages communicating with said outer conduits, and crusher plates disposed in operative relation to said grinding cylinders.

. of the character set forth comprising a base,

a fan casing carriedbysaid base, a plurality of fan units arranged within said icasing, a

. double hollow shaft extending from each side of said casing, a plurality of grinding elements defining a cylinder carried by each outer hollow shaft, saidelements and outer shaft each having apertures communicating with the space between said shafts, and means for feeding material to said grinding rings, said fan units-being adapted to draw the finely divided material through the outer portions of said hollow shafts and eject it through the inner portions thereof.

7. A grinding and separating apparatus of the character set forth comprising a base, a fan casin carried by said base, a plurality of fan mem ers arranged within said casing, a double hollow shaft extending from each side of said casing. a plurality of longitudinally disposed grinding plates carried by the outer shaft, said outer shaft having apertures communicating with the space between the shafts,'crusher lates disposed in operative relation to said grinding plates, and meansvfor oscillating said crusher plates.

grinding and separating apparatus j 8. A grinding and separating apparatus of the character set forth'comprising a base, a fan casing journalled on said base, a pair of suction fan units and a pressure fan unit arranged withm sa1d casing, a condultextending from each side of sa1d fan casing -and each conduit being operatively connected with said pressure fan unit, a lurality of radially disposed ribs forms on each conduit, a second conduit carried by said ribs, the spaces betweensaid ribs connecting with said suction fan units, rindin elements carried by said second con uit, sai

grinding elements each having apertures communicating with the space between said conduits, and means for feeding material to said grinding elements.

9. A grinding and separating apparatus of the character set forth comprising a base, a fan casing journalled on saidbase, a pair of suction fan units and a' pressure fan unit arran ed within said casin a hollow, shaft exten ing from 'each side 0 said fan casin and each shaft being operatively. connecte with said pressure fan unit, a second hollow shaft enclosing the first mentioned hollow shaft, said suction fan units being connected with the spaces between said shafts, grinding plates carried by the outer hollow shaft, said plates'each having apertures communicating with the spaces between said shafts, a pair of crusher plates disposed about each group of grinding plates, and means for oscillating said crusher plates.

10. A grinding and separating apparatus of the character set forth comprising a base, a fan casing journalled on said base, a pair of suction fan units and a pressure fan unit arranged within said casing, a hollow shaft extending from each side of saidfan casin and each shaft being operatively con-

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