US832047A

US832047A - Centrifugal machine.

Info

Publication number: US832047A
Application number: US26113905A
Authority: US
Inventors: Anders Johan Ericsson
Original assignee: Separator AB
Current assignee: Alfa Laval Holdings Amsterdam AB
Priority date: 1905-05-19
Filing date: 1905-05-19
Publication date: 1906-10-02
Anticipated expiration: 1923-10-02

Description

No. 832,047. PATENTED OCT; 2, 1906. A. J. ERIGSSON.

OBNTRIFUGAL MACHINE.

APPLICATION FILED MAY 19, 1905.

2 SHEBTS-SHEET 1.

' 1/??672721 2145M MA, jrh'M 2350;

A4, m4 iwwb j H No. 832,047. PATENTED OCT. 2, 1906. A. J. ERIOSSON.

GENTRIFUGAL MACHINE.

APPLIUATION FILED MAY 19. 1905.

Fig.5

GID Z m 16 v J 1 Z \fl I I I 22 X 21 THE NORRIS PETERS cu, WASHINGTON, 04 c.

UNITED STATES PATENT" oFFIoE.

ANDERS J OHAN ERIOSSON, OF STOOKHOLM, SWEDEN, ASSIGNOR TO AKTIEBOLAGET'SEPARATOR, OF STOOKHOLM, SWEDEN.

CENTRIFUGAL MACHINE.-

Specification ofLetters Patent;

Patented Oct. 2, 1906.

ings, and to letters of reference marked there-- on, which form a part of this specification.

My invention relates to improvements in centrifugal separators such as used for separating liquids'from solid matters, and more especially to separators of. such art as described in my United States Patent No.-

773,489, and it more particularly relates to' arrangements for facilltating the continuous carrying away of the solid'matters out of the se arator. As is more fully described in the said United States Patent No. 773,489, the solids that stratify along the innerwall of the bowl are brought outside the bowlby means of scraper-wheels, carrying the solid matterstransversely throughthe layer of liquid to'a point within the same nearer the center of the bowl, whence the solid matters are continuously carried away in such a manner that they immediately before the scrapers of the scraper-wheels occupy their positlon nearest the center of the bowl, owing to the action of the centrifugal forceand their own gravity, areloosened from the. scrapers and then thrown downward through a central-opening.

into a partition placed under the scraperwheels or in the very bottom of the bowl. It is,.however, evident that if the rotary speed ofthe bowl is-relatively high the gravity will.

be of no importance, but the solids are thrown out in the direction of the centrifugal force,.whereby the contents of the scrapers will again be thrown out toward the periphery ofthe bowl.

My invention relates to a device for preventing this inconvenience, so that even when the rotary speed of the bowl is relatively high the solid matters may not be thrown out of the scraperstoward the periphery of the drum, but are caught. bythis device and brought outside the bowl.

The device is illustrated on the accompanying drawings, wherein igure 1 is a vertical section of a centrifugal bowl with a portion of my improvement applied thereto. Fig. 2 shows a part of the centrifugal bowl of Fig. 1 in invested plan view. Fig. 3 is a partial section of a cene trifugal bowl with a portion of my improve ment applied thereto; Fig. 4, a detail in plan view of Fig. 3. Fig. 5 is a partial section of a centrifugal bowl with my improvement applied thereto.

Like letters of reference indicate like parts in the difl'erent figures.

Taking first Figs. 1 and 2, the bowl consists of an upper art or cover a and an unolerv part or bottom screwed together in the usual manner.

The driving-shaft c of the bowlis at the top enlarged to a flange (:1, riveted to the bottom= of the bowl'or integralwith it. Betweenthe flange (Z and the bottom?) ofthe bowl channels d d are located. The driving-shaft c is hollow andwithin the samethe massive shaft e projects, on the top of which. a.nave*f,.in.-

tegral with the cross-pieces 9,1 is mounted.v

This cross-piece g is provided with, short shafts h h, which are securedto the crosspiece by means of nuts or the like. On these shafts the scraperewheels i i and the cog: wheels k is move. the cog-wheels are secured toeach other;

The cog-wheels 7c, 76 are in gearing with a;cog

ring on a central disk '1, which is secured to the bowl by means of stays m. By this ar rangement the shafts h h and the cog-wheels.

1c 7c and the scraper-wheels 'M'willreceive a.

motion relative to the bowl when the shaft 0 has a speed higher or lower than that of the shaft e. At. the same time the scraper wheels 'L i will rotate on'their shafts h h as the cog-wheels 7c 76 are in. gearingxwith the cog;

The bottom I) is provided with a. central circular opening b,inclining outward.

The scraper-wheels and ringon the disk 1.. The scraper-wheels i if are provided with. scrapers n. of scoopor shovel. shape. The cross-piece g. is,. as is:

shown in Figs, 1 and2, provided with obliquelyupward'directed shieldeshapedparts 0,

thus situated that the scrapers on. rotatlng pass between them and the centerofthe bowl. The inclined. edge of the opening; in

the bottom-of thebowl forms acontinuation of the obliquely di rected shieldso. Byfthis arrangement the solid matters being brought by means of the scrapers to a position nearest to the center of the bowl from where they are thrown out horizontally in the direction of the centrifugal force will on their movement outward meet the shields 0 of the crosspiece g and are caught by them. Consequently they will be directed obliquelydown-v ward and slide on the parts 0 and the inclined edge of the opening in the bottom to the channels (1 between the flange d and the bottom I) of the bowl, through which chan nels they are brought outside the bowl.

The constructional form shown in Figs. 3 and 4 differs from that shown inFigs. 1 and 2, inasmuch as the obliquely-directed shieldshaped parts 0 have a cylindrical extension 1" reaching slightly below the edge of the opening in the bottom of the bowl. The solid matters being caught by the parts 0 slide thereon downward and reach the cylindrical parts 1", from which they are removed by means of a scraper-wheel p, the edges of which are turned or inclined, so that when moving they will bring the solid matters downward. On leaving the lower edge of the extension 1" the solid matters flow outside the bowl through the channels 61. The scraper-wheel -12 is secured to the flange (1 by means of nuts or in any other suitable manner, so that it rotates relatively to the crosspiece g.

A third constructional form is shown in Fig. 5. In this modification the scrapers n are each provided with a shield 0, that inclines to the center axis of the shaft h. When the scrapers occupy the position nearest to the center of the bowl, the solid matters I slide downward on the shields 0 and are thrown out toward the shield-shaped parts 0 over the edges of the shields 0. Then they are brought outside the bowl in the same manner as indicated by reference to Figs. 1 and 2. It is evident that the parts 0 need not in this case reach more than immediately above the. lower edges of the shields 0. In Fig. 5 the shields 0 form together a conical ring on the scraper-wheels; but it is clear that they need not be integral with each other. It is evident that the wall of the bowl can be perforated or not.

What I claim is 1. In a centrifugal machine the combination with the rotary bowl having scraper- -wheels for conveying the solid matters stratified on the walls to a point nearer the center line of the bowl, said scraper-wheels being driven by a separate shaft with a speed different from that of the bowl, of an inclined shield for each scaper-wheel intersecting a plane through the center line of the bowl and the center line of the scraper-wheel and located between the rotating scrapers and the center of the scraper-wheel and extending downward over the central-opening in the bottom of the bowl.

2. In a centrifugal machine the combina tion with the rotary bowl having scraperwheels for conveying the solid matters stratified on the walls to a point nearer the center line of the bowl, said scraper-wheels being driven by a separate shaft with a speed different from that of the bowl, of an inclined shield for each scraper-wheel intersecting a plane through the center line of the bowl and the center line of the scraper-wheel and located between the rotating scrapers and the center of the scraper-wheel and extending downward over the central opening in the bottom of the bowl, said shields forming part of the central disk upon which the shafts of the scraper-wheels are mounted.

3. In a centrifugal machine the combination with the rotary bowl having scraperwheels for conveying the solid matters stratified on the walls to a point nearer the center line of the bowl, said scraper-wheels being driven by a separate shaft with a speed different from that of the bowl, of an inclined shield for each scraper-wheel intersecting a plane through the center line of the bowl and the center line of the scraper-wheel andlocated between the rotating scrapers and the center of the scraper-wheel and extending downward over the central opening in the bottom of the bowl, said shields provided with cylindrical extensions projecting over the lower edge of the central opening and meansfor scraping ofi the solid matters stratifying on said cylindrical extension and conveying them to the outlet.

4. In a centrifugal machine the combination with the rotary bowl having scraperwheels for conveying the solid matters stratified on the walls to a point nearer the center line of the bowl, said scraper-wheels being driven by a separate shaft with a speed different from that of the bowl, of an inclined shield for each scraper-wheel intersecting a plane through the center line of the bowl and the center line of the scraper-wheel and located between the rotating scrapers and the center of the scraper-wheel and extending downward over the central opening in the bottom of the bowl, said shields provided with cylindrical extensions projecting over the lower edge of the central opening and inclined scrapers fixed at the bowl and located in the central opening in the bottom of the bowl.

5. In a centrifugal machine the combination with the rotary bowl of scraper-wheels for conveying the solid matters stratified on the walls to a point nearer the center line of the bowl, said scrapenwheels being driven by a separate shaft with a speed different from that of the bowl, the scrapers of said and of an inclined shield for each scraperwheel, intersecting a plane through the center line of the bowl and the center line of the scraper-wheel and located below the scraperwheel, between the scrapers and the center of the scraper-wheel and extending clownward over the edge of the central opening in the bottom of the bowl.

6. In a centrifugal machine, in combination, a rotary bowl provided with an opening and scrapers adapted to convey the solid material on thewall of the bowltoward the center of the bowl, and a shield inclined at an angle to the axis of the bowl.

7. I11 a centrifugal machine, in combination, a rotary bowl provided with an opening and scrapers adapted to convey the solid material on the wall of the bowl toward the center of the bowl, and a shield inclined at an angle to the axes of the bowl and scraper.

8. In .a centrifugal machine, in combina tion, a rotary bowl provided with an opening and scrapers adapted to convey the solid material on the wall of the bowl toward the center of the bowl, a shield inclined at an angle to the axis of the bowl, said shield extending downward into said opening in the bowl.

9. In a centrifugal machine, in combination, a rotary bowl provided with an opening and scrapers adapted to convey the solid. material on the wall of the bowl toward the center of the bowl, a shield inclined at an angle to the axes of the bowl and scraper, said shield extending downward into said opening in the bowl.

10. In a centrifugal machine, in combination, a rotary bowl provided with an opening and scrapers adapted to convey the solid material on the wall of the bowl toward the center of the bowl, a shield inclined at an angle to the axis of the bowl, said shield having a vertical extension extending into said openmg.

11. In a centrifugal machine, in combina tion, a rotary bowl provided with an opening and scrapers adapted to convey the solid material on the wall of the bowl toward the center of the bowl, a shield inclined at an angle to the axes of the bowl and scraper, said shield having a vertical extension extending into said opening.

12. In a centrifugal machine, in combination, a rotary bowl provided with an opening and scrapers adapted to convey the solid material on the wall of the bowl toward the center of the bowl, a shield inclined at an angle to the axis of the bowl, said shield having a vertical extension extending into said opening, and means to remove the solids adhering to said extension and carry them to the outlet.

13. In a centrifugal machine, in combination, a rotary bowl provided with an opening and scrapers adapted to convey the solid ma terial on the wall of the bowl toward the center of the bowl, a shield inclined at an angle to the axes of the bowl and scraper, said shield. having a vertical extension extending into said opening, and means to remove the solids adhering to said extension and carry them to the outlet.

14. In a centrifugal machine, in combination, a rotary bowl, provided with an opening, and scrapers adapted to convey the solid material on the wall of the bowl toward the center, and a shield for each scraper, said shield being at an angle to the axis of the bowl.

15. In a centrifugal machine, in combina-.