Centrifugal machine

• US 3,989,185 A
• Filed: 06/23/1975
• Issued: 11/02/1976
• Est. Priority Date: 06/17/1974
• Status: Expired due to Term

• Current Assignee: Fives-Cail Babcock
• Original Assignee: Fives-Cail Babcock
• Inventors: Mercier, Andre
• Primary Examiner(s): Krizmanleh, George H.
• Application Number:
  US05/589,349
• Time in Patent Office: 498 Days
• Field of Search: 233/2, 233/16, 233/27, 233/28, 233/31, 233/32, 233/34, 233/35, 233/46, 233/45
• US Class Current: 494/67
• CPC Class Codes: B04B 11/02 Continuous feeding or discharging; Control arrangements therefor
• CPC Class Codes: B04B 11/06 Arrangement of distributors or collectors in centrifuges
• CPC Class Codes: B04B 3/00 Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneous sifting or filtering
• CPC Class Codes: C13B 30/06 by centrifugal force

Abstract

A slurry-feeding arrangement for a continuously operating, vertical, centrifugal filter includes a dish-shaped receptacle coaxially mounted on the hub portion of the bowl and a distributor having the shape of an inverted cup enveloping the receptacle and connected to the hub by radial arms of a spider plate integral with the receptacle. The slurry to be filtered is centrifugally deposited from the receptacle on the inner face of the distributor, and thinning of the deposited film of slurry on the segments of the distributor face between the arms and the open end of the distributor is prevented by radially open recesses on either circumferential side of each arm in the inner distributor face.

Claims

1. A centrifugal machine comprising:

a. a bowl having a hub portion;

b. drive means for rotating said bowl continuously about an axis of rotation;

c. a receptacle mounted in said bowl for rotation therewith about said axis and having an axially terminal portion open in one axial direction;

d. a distributor having an inner face spacedly enveloping said terminal portion and flaring in an axial direction opposite to said one direction;

e. a plurality of radial arms interposed between said hub portion and said inner face and securing said distributor to said bowl for joint rotation,

1. said arms defining axial passages therebetween,

2. said inner face being formed with two recesses radially open toward said passages and axially open contiguously adjacent each arm in respective circumferential directions,

3. said arms and said recesses being located in a common radial plane; and

f. feeding means for feeding a slurry to said receptacle.

2. A machine as set forth in claim 1, wherein said distributor in each of said recesses has a wall surface parallel to said axis.

3. A machine as set forth in claim 1, wherein the cross section of said inner face increases in said opposite direction in a zone axially adjacent said arms at a greater rate than in respective zones of said face axially offset from said zone in said one direction and in said opposite direction.

4. A machine as set forth in claim 1, wherein said arms are respective parts of a unitary plate member fixedly fastened to said hub portion, said plate member having a peripheral portion formed with said passages and with said recesses, said peripheral portion constituting a part of said distributor, the distributor further including a cup-shaped portion and an a rim portion axially offset from said plate member, said cup-shaped portion and said rim portion fixedly receiving said peripheral portion therebetween.

5. A machine as set forth in claim 4, wherein said peripheral portion has a plurality of faces parallel to said axis of rotation, each of said faces extending circumferentially between two of said recesses and bounding one of said passages in a radially outward direction, each of said faces being substantially flush with said cup-shaped portion and projecting radially inward beyond said rim portion.

6. A machine as set forth in claim 5, wherein said peripheral portion, in each of said recesses, has a surface parallel to said axis and substantially flush with said rim portion.

7. A machine as set forth in claim 4, wherein said receptacle is fixedly connected to said plate member.

8. A machine as set forth in claim 4, wherein said cup-shaped portion has an apertured wall extending radially relative to said axis, an outer, annular, axial wall connecting said radial wall to said peripheral portion, and an inner, annular, axial wall projecting from said radial wall toward said receptacle, and bounding an axial feed channel, said feeding means including means for feeding said slurry to said receptacle through said channel.

9. A machine as set forth in claim 1, wherein said bowl has a circumferential wall flaring conically in said one direction, and has a narrow end fixedly fastened to said hub portion and a wide end, and overflow means at said wide end for discharging a portion of said slurry.