US3412945A

US3412945A - Twin rotor high efficiency crusher

Info

Publication number: US3412945A
Application number: US588502A
Authority: US
Inventors: Sr Walter J Sackett
Original assignee: Individual
Current assignee: Individual
Priority date: 1966-10-21
Filing date: 1966-10-21
Publication date: 1968-11-26
Anticipated expiration: 1985-11-26

Description

Nov. 26, 1968 w. J. SACKETT, SR 3,

TWIN ROTOR HIGH EFFICIENCY CRUSHER 2 Sheets-Sheet 1 Filed Oct. El. 1966 INVENTOR WALTER J. SAC/(E77; 57?.

ATTORNEY Nov. 26, 1968 w. J. SACKETT, SR 3,412,945

TWIN ROTOR HIGH EFFICIENCY CRUSHER Filed Oct. 21. 1966 2 Sheets-Sheet 2 Mia FIG. Z.

E I i 55 j:

FIG. 3.

I E25 P333 k g \m 4 22 I mvsu'roa WALTER J. SAG/(Err, SR.

ATTORNEY United States Patent O 3,412,945 TWIN ROTOR HIGH EFFICIENCY CRUSHER Walter J. Sackett, Sr., 3700 Echodale Ave., Baltimore, Md. 21206 Filed Oct. 21, 1966, Ser. No. 588,502 8 Claims. (Cl. 241154) ABSTRACT OF THE DISCLOSURE A materials crusher is described in which a pair of oppositely rotatable elements are arranged in an enclosure. One of the rotatable elements is in the form of a squirrel cage of parallel bars. The other rotatable element consists of a plurality of lengths of link chain attached to the cross rods of a smaller cage.

A feed port is arranged in the top of the housing proximate the squirrel cage. Material dropped thereon is impelled against the flailing chains. The resulting powder falls out of the open bottom.

This invention relates generally to comminuting devices and more particularly to a twin rotor high efiiciency crusher for hard lump materials.

In process work particularly, hard lumps are formed which ordinary crushing methods do not effectively handle. Other mills fail to reduce these lumps to a fine enough powder for feeding back to process.

It is, therefore, an object of this invention to provide an improved twin rotor high efiiciency crusher for pulverizing lumps down to a finely divided state.

Another object of this invention is to provide a feed system in a twin rotor high eificiency crusher or the like which receives, accelerates and then tangentially discharges the finely powdered material thus crushed.

Yet another object of this invention is to provide an oppositely moving arrangement in a comminuting crusher whereby a greatly increased flying impact is obtained between lumps of material and a breaker element.

Still another object of this invention is to provide a more efficient, longer lived and quieter operating lump crusher than heretofore.

Still another object of this invention is to provide a crusher which is self-cleaning due to the flying impact of material being cast from one rotor to another.

Other objects and attendant advantages of this invention will become more readily apparent and understood from the following detailed specification and accompanying drawings in which:

FIG. 1 is a vertical section taken on the longitudinal centerline of an improved twin rotor high efficiency crusher;

FIG. 2 is a transverse section showing details of the chain rotor taken on line 2-2 of FIG. 1; and

FIG. 3 is a transverse section showing details of the cage rotor taken on line 3-3 of FIG. 1.

Referring now to the drawings, particularly FIG. 1, reference numeral indicates generally a twin rotor high efiiciency crusher. This improved crusher 10 consists of a hollow sheet metal housing split on a horizontal line into an upper portion 12 and a lower portion 14. The top of upper portion 12 is somewhat pitched at the ends and has a flanged aperture for an inlet chute 16.

The lower portion 14 of the mill 10 is rectangular and serves as a support structure for a chain rotor 18 and a cage rotor 20. The bottom or lower portion 14 of mill 10 is open to provide an outlet 22.

Angular bearing block supports 26 are secured to the two opposing support side walls 24 of the lower portion 14 and are strengthened with gussets 28.

Patented Nov. 26, 1968 The chain rotor 18, as best shown in FIG. 2, is provided with a drive shaft 30 which is journaled on hearing blocks 32 secured upon supports 26. Three apertured discs 34 are mounted upon the shaft 30 and are spaced apart and secured for rotation by bosses 36.

An even plurality of equally spaced rods 38 extend through the three apertured discs 34 and are secured by nuts 40. These rods 38 carry

alternate banks

42 and 44 of four and three chains, respectively. The chains 46 of these

banks

42 and 44 are mounted by one end link and spaced on the rods 38 by spacers 48 so as to be free to fly outwardly by centrifugal force when the chain rotor 18 rotates rapidly as shown by the curved arrow in FIG. 1.

The cage rotor 20 rotates in the opposite direction as shown by the other curved arrow of FIG. 1. For this purpose, a drive shaft 50, as shown in FIGS. 1 and 3, is mounted on another pair of bearing blocks 32 and the cage rotor 20 consists of two circular end plates 52 spaced and secured for rotation by shaft bosses 54. A drum-like array of spaced bars 56 extend between the end plates 52 and are welded thereto.

In operation, with both

rotors

18 and 20 rapidly rotating, the lumpy material is introduced into the mill 10 through inlet chute 16 to fall upon the cage rotor 20. Some of the lumpy material falls through the apertures between the bars 56 and is discharged from outlet 22. The remaining portions of the material are thrown violently at a tan- 'gent toward the flailing

sweeping chain banks

42 and 44 to be broken up and reduced by the blows to a powder which then falls through outlet 22.

There is no contacting of metallic parts in this mill 10 with consequent little wear and with relatively quiet operation.

Obviously many modifications and variations of the present invention are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.

What is claimed is:

1. A twin rotor high efficiency crusher for breaking up lumpy materials into powder, comprising a housing having an upper portion and a lower portion, said upper portion being substantially pitched at the ends and having an aperture for an inlet chute for receiving lumpy materials to be broken up into powder, said lower portion having a cage rotor means and a chain rotor means spaced from each other for reducing the size of materials fed consecutively thereto, with said lower portion having an outlet.

2. A twin rotor high efficiency crusher as recited in claim 1, wherein said chain rotor means and said cage rotor means are parallel spaced and in juxtaposition with respect to each other.

3. A twin rotor high efficiency crusher as recited in claim 1, wherein said chain rotor means includes a plurality of apertured discs having equally spaced rods extending through said discs, with said rods carrying alternate banks of chains.

4. A twin rotor high efliciency crusher as recited in claim 1, and additionally means for driving said chain rotor means and said cage rotor means.

5. A twin rotor high efiiciency crusher as recited in claim 1, wherein said cage rotor means and said chain rotor means operate in opposite directions so that said materials are substantially fed therebetween.

6. A twin rotor high efficiency crusher as recited in claim 1, wherein said cage rotor means includes a drumlike array of spaced bars extending between end plates.

7. A twin rotor high efiiciency crusher as recited in claim 6, wherein the introduced material falls upon cage rotor means, with a portion of the lumpy material falling through said bars, and with the remaining portion of the material being thrown violently at a tangent toward said chain rotor means to be broken up and reduced by blows to a powder.

8. A twin rotor high efiiciency crusher as recited in claim 7, where the crusher is self-cleaning due to the flying impact of material being cast from one rotor to another.

4 References Cited UNITED STATES PATENTS 304,506 9/1884 Davids 241187 X 1,433,042 10/1922 Sedberry 241-154 X 3,327,955 6/1967 Tyler a- 24l187 WILLIAM W. DYER, JR, Primary Examine r.

F. T. YOST, Assistant Examiner.