US2212452A

US2212452A - Ball mill

Info

Publication number: US2212452A
Application number: US239111A
Authority: US
Inventors: Pereny Andrew
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-11-05
Filing date: 1938-11-05
Publication date: 1940-08-20
Anticipated expiration: 1957-08-20

Description

A. PERENY BALL MILL Filed Nov. 5, 1938 Patented Aug. 20, 1940 UNITED STATES PATENT OFFICE BALL MILL Andrew Pereny, Columbus, Ohio Application November 5. 1938, Serial No. 239,111

1 Claim.

This invention relates to improvements in mills and pertains particularly to ball mills.

The primary object of the present invention is to provide a novel and improved ball mill machine which isso designed that a number of barrels may be disposed one above the other to be rolled or tumbled simultaneously and adapted to be individually removed from the machine or changed while the machine is in operation without disturbing or necessitating the removal of any of the other barrels or jars in which material is being ground.

Another object of the invention is to provide an improved vertical tandem ball mill in which provision is made for increasing the number of barrel or jar rolling units, if desired, without increasing the floor space required for the mill.

Still another object of the invention is to provide a ball mill machine in which novel means is employed for supporting grinding barrels or jars for rolling movement.

A still further object of the invention is to provide in a machine of the character described, a novel grinding jar structure. 5 The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming part of this specification, with the understanding, however, that the inventionv is not to be confined to any strict conformity with the showing of the drawing but may be changed or modified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

In the drawing:

Fig. 1 is a view in front elevation of the mill embodying the present invention, a portion of the same being in section.

Fig. 2 is a view in side elevation of the mill.

Fig. 3 is a sectional view on the line 3-3 of Fig. 1. v

Fig. 4 is a sectional view through the mouth end of a grinding jar and through the, cap and securing means therefor.

Referring now more particularly to the-drawing, the base portion of the mill structure will be seen from the drawing to consist of two pairs of legs each indicated generally by the numeral I and each of these pairs of legs consists of the two vertical portions 2 connected at their upper ends by the horizontal portion 3. Each vertical portion 2 has a foot 4 which may be secured, if desired, to the underlying floor structure. The legs may be constructed of any suitable material such as angle iron material or the like, and if made of angle iron, the legs will be arranged so that the portions 3 will have one flange extending downwardly and the other flange extending horizontally toward the opposite leg.

Secured to the horizontal portions 3 of the legs and connecting the legs together, is a plate 5 to the underside of which a motor 6 is attached. The armature shaft of this motor extends laterally beyond one leg of the mill, as indicated at l, m

and carries upon its end a pulley wheel 8.

Disposed upon and longitudinally of the top of the horizontal portion 3 of each leg is a bearing unit consisting of two bars 9 placed one upon the the other and having confronting bearing re- 15;

cesses lb which form bearing openings for trunnions ll extending from the ends of rollers I2.

Upon the side of the machine adjacent the motor pulley 8, a trunnion of one of the rollers is extended to receive a double pulley l5. This 2 double pulley has a belt [6 connecting it with the pulley 8 of the motor so that by operating the motor-6, rotary motion can be transmitted to the roller with which the pulley H5 is connected.

Secured to each of the legs I and extending vertically therefrom is a standard I1. These standards are in the same plane transversely of the mill and are secured together adjacent their upper ends by the tie rod 18 which extends 30 through the sleeve l9 which is disposed between the standards.

At spaced intervals lengthwise of each standard there is secured a horizontal arm 20 which is perpendicular to the supporting standard and 35 extends forwardly therefrom inthe Vertical plane of the underlying leg I. Each of the arms 20 is in the same horizontal plane as an arm of the adjacent standard and each of these arms supports a bearing unit made up of two plates 2| 40 disposed one upon the other and, like the plates or members 9 of the base supported unit, having opposing recesses 22 which combine to form bearing openings for trunnions 23 extending from the ends of rollers 24 which are of the same 5 construction as the rollers l2. These rollers, like rollers 12, have a solid body portion l3 and a sheath or covering of rubber which is indicated by the numeral Hi. There are thus provided at vertically spaced planes, pairs of spaced parallel 5o rollers and one roller of each of the pairs above the base rollers I2 has a trunnion extended to receive a double pulley 25. Belts 26 connect the pulleys 25 and I5 together, as shown in Figs. 1 and 2, so that the operation of the motor 6 will 55 produce rotary motion in a roller of each of the pairs.

The numeral 21 designates a barrel or jar which is preferably of porcelain and. has one end reduced to form the neck 23 through which the mouth opening 29 is formed, which opening is normally closed by the cover or lid 30. Formed upon the top of the lid is a rib 3! having a curved outer edge which at the end adjacent the center of the cover is notched, as indicated at 32, to receive a bail 33 which is pivotally attached to the neck 28 of the jar. This bail is oscillatable and is adapted to .be sprung over the rib 3! for frictional engagement in the notch 32, as shown in Fig. 4.

In the operation of the present machine, the jars 21 are laid upon their sides upon a pair of rollers, as shown in Fig. 1, after being charged with the material which is to be ground and with the usual balls or pebbles (not shown) which are employed in ball mills. When the motor 6 is operated, rotary motion will be transmitted to one of the rollers of each pair and this motion will be then transmitted to each of the jars which will turn or roll in contact with the driven and the idler rolls which support it. The whole mill will thus be driven by means of power applied to one roller, so that material within the jars'of the several pairs of rollers will be tumbled or rolled with the grinding balls therein against the walls of the jar to efiect the desired grinding and mixing of the material.

It will be readily apparent from the foregoing that the mill may be made of one jar capacity or of any number up to six jars without requiring any more floor space than is necessary for a single jar. The capacity of the mill can be changed as required, by merely putting on longer vertical standards H with additional arms and bearings. In other words, additions may be made as required, step by step, once the base is made. The present mill structure gives the simplest form of grinding with enough flexibility to increase capacity as need therefor may arise Without increasing floor space and the mill employs a minimum power output because of the tandem arrangement of the units. It will also be readily apparent that with the arrangement shown and described, any one of the jars may be removed and replaced while the mill running, without interfering with the grinding of material in the other jars.

What is claimed is:

A mill structure of the character described,

tally disposed plate and supporting legs therefor, a pair of bearing units disposed upon the top of said first unit, each of said bearing units being disposed at one side of the base unit and consisting of elongated upper and lower superposed members extending from the front to the rear of the base unit, an electric motor secured to the underside of said plate and having an armature shaft projecting beyond one side of the base unit, a pair of rollers disposed in spaced parallel relation between said bearing units and each having an end trunnion disposed between the members of a bearing unit, one of said trunnions being extended beyond the adjacent side of the base unit, a pulley upon the extended trunnion, a pulley upon said motor shaft, an operative coupling between said pulleys, a vertical standard disposed at each side of the base unit at the rear thereof, a series of forwardly extending arms carried by each of said standards, a bearing unit extending longitudinally of each of said standard arms, a pair of rollers disposed in spaced parallel relation between each horizontally spaced pair of arms and having end trunnions supported by the arm bearings, and an operative coupling between said first trunnion supported pulley and a roller of each of the overlying pairs.

ANDREW PEREN Y.

.comprising a base unit consisting of a horizon-