US2370315A - Centrifugal separator - Google Patents

Description

Feb. 27, 1945. D JONES 2370315 CENTRIFUGAL SEPARATOR Filed Feb. 4, '1943 4 10.& j

INVENTORS.

leo D. James Xc Wilmer H Bath.

BY E' W ATTORNEY Paten a Feb. 27, 1945 2370315 e UNITED 'STATES PATENT OFFICE GENTRIFUGAL SEPABATOB Leo D. Jones, Philadelphia, and Wilme- H. Bth. West Conshohocken, P., :sulmoi-s to The Shiu-pics Corporation, Philadelphia, Pa., corporation of Delawarc 4 Application February 4 1943, Serial No. #14,641

2 Ciaims.

The present invention pertains to centrifugal machines designed to eifect separation of adhering liquid from solids by straining of the liquid from the solids under the influence of centrifugal of the screen, and that this Joint, due to the fact that it has less flexibility than the remainder of the screen, sometimes projects to a point slightly within the inner curved surface of the remaining portions of the screen, with the result that damforce. It consists in an improvement of the 5 age occurs by reason of contact of this joint with straining element or screen of Brewer Patent the dislodging tool. These disadvantages are- 2,271,493, as illustrated particularly in Figures 4, avoided with the screen construction of the pres- 12 and 13 of that patent. ent invention. i

The features of the present invention pertain As illustrated in Figur-es 2 and 3 of the drawing, to details of improvement of the screen which the screen of the invention consists of a. plurality provide increased strength and flexibility. By of interwoven warp wires !3 and weft wires Il. the us of these features, the danger of breakage The construction of the screen of the invention is minimized because of the increased strength, may be best understcod by a preliminary discusand the danger that the screen joint may project sion of the prefe'red method of making it. The inwardly from the circumference of the remain- 15 two end weft wires of a flat strip of screen der of the screen is also minimized, thereby minitaining warp and welt wires !3 and M 'are first mizing the chance that this joint may -be damaged removed to provide substantial lengths of warp by impact against the tool periodically used to wires extending as indicated at 15 beyond the dislodge the collected and dehydrated solids. endmost weft wires. The screen is then bent into These advantages are attained by securing the circular shape, and the extending warp wires ends of the circumferentially extending screen to from each end of the screen are straddled onto a a relatively flat metal plate by a metal union, as metal plate !6 so that the plate occupies the posimore specifically set forth hereinaiter. tion vacated by the removal of the weft wires.

Further features and advantages of the inven- The metal plate should be relatively thin in order tion will be evident from th following detailed 95 that the total thickness of the wires plus the plate description when read in the light of the attached is substantially the same as the maximum thickdrawing, in which, ness of the screen portions adjacent the zones at Figure 1 is a longitudinal cross section through which the warp wires cross the weft wires. The a centrifugal rotor and screen, illustrating the warp wires are then connected to the plate iS. by manner in which the screen is used, a. metallic union, such as welding. The metal Figure 2 is a detailed plan view of the screen plate |8 should prefe'ably be relatively flexible in joint, and order that it may assume the shape of the sur- Figure 3 is a developed cross section on the line rounding circumferentia wall li when inserted 3-3 of Figure 2. within this wall and subjected to centrifugal force Referring to Figura 1 of the drawing, the cenby rotation of the rotor o. If the plate IS is not trifugal rotor n is provided with a circumferensumciently fiexible to assume this shape because tial wall l I having perforations !2 for discharge of the natural stress imposed in placing the screen of liquid separated from solids by rotation of the within the wall of therotor or because of cenrotor. The circular woven wire screen of the trifugal force, it should be curved to conform to invention fits snugly within the inner surface of 40 the shape of the rotor in which it is to be used, the circumferential wall I l. The details of conbefore placing it within the rotor wall. As il1us-' struction and operation of the machine other trated in the drawing, the alternate' wires from than those pertaining to the screen may be simiopposite ends of the screen which ie on the same lar to those of Brewer Patent 2,271,493, or of any side of the plate lt preferably intermesh someother construction used in the art of hydrowhat at their ends. extractors. In the Brewer patent, the cylindrical In operation, when a rotor containing the imscreen is formed by welding the ends of the warp proved screen of the invention is used in efiecting wires of a woven wire screen together, after bendcentrifugal removal of liquid from solids, liquid ing such a screen into cylindrica form. such an removed from the solids lying within the portion arrangement, while it provides important advanof the straining surface overlying the plate l 6 will tages over the art prior to the Brewer patent, as not, of course. be immediately removed, but this pointed out in the specification of that patent, is liquid will flow circumferentially along the plate subject to the disadvantage that the welded joint lt' during rotation of the rotor until it reaches a issometimes weaker than the remaining portions pervious portion oi the screen and is removed u through one o! the outlets II.

various modiiicstions are possible within the scope of the invention. and we do not therefore wish to be limited except by the scope of the following claims. e

We claim:

1. In a centrifugal machine for searating liquids from solids. the combination comprising a rotor and a circumferential woven wire screen within said rotor said screen comprising a. plurality of laterally spaced warp wires bent to conform to the shape of said rotor and having their opposite ends brought into proximity with each other. and a plurality of weft wires extending across said warp wires to form the desired woven structure; and a. relativeiy wide plate, the surface of which is adapted to lie parallei to and adiacent the inner surface of the rotor and having a thickness not substantially greater than the greatest diameter of said weft wires. said plate extending in a direction substantially parallel to the weft wires and between the oppositely extending ends or said warp wires and Secured thereto to form a joint therebetween devoid of weft wires, the respective warp wires of each end of the screen being bent so that alternate wires extend over the edges of said plate and lie on opposite sides thereof, and said altemate oppositelv extending wires being Secured respectively to said opposite sides of said plate.

2. In a centrifugal machine for separating liquids from solids. the combination comprisinx a rotor and a circumferential woven' wir-e screen within said rotor. said screen comprising e. plurality of Ister-any spaced werp wires bent to coni'orm to the shane of said rotor and having their opposite ends .brought into proximity with each other, and a plurality of weft wires extending across said warp wires to form the desired woven structure; and a relatively wide'plate, the surface of which is adapted to .lieparallel to and -adjacent the inner surface of the rotor and havi wires from one end of said screen which are secured to one side of said plate intermeshing with ends of similar wires extending in an opposite direction from the opposite ends of said screen on the same side of said plate.

LEO D. JONES.

WILMER H. BATH.

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