Centrifuge scroll with abrasion resistant inserts
AssigneeTema Systems, Inc.
InventorThomas B. Paschedag
Life of this patent
Estimating the term…
Abstract
A scroll and screen centrifuge especially suited for processing abrasive materials in which the surfaces of the screw flights on the scroll members contain recessed abrasion resistant shields. The abrasion resistant shields have an upper exposed surface flush with the front surfaces of the screw flights. The scroll members also have feed openings designed for material flow which further reduces the abrasion of the scroll member.
Claims14
A centrifuge for processing an abrasive liquid and solid material to separate the liquid from the solid material comprising:
- a housing;
- a cage member having an open end and a closed end and mounted within said housing to rotate about an axis of rotation, said cage member having a circumferential screen with an inner surface;
- and
- a scroll member mounted within said cage member to rotate about said axis of rotation relative to said cage member, said scroll member receiving the combined liquid and solid material in a central portion and having
- a tubular side wall with a front end and a rear end adjacent said open and closed ends, respectively, of said cage member,
- a helical screw flight extending outwardly from said tubular side wall between said rear end and said front end of said scroll member, said screw flight having an edge moving in close proximity and relative to said inner surface of said circumferential screen, and said screw flight further having a front surface substantially perpendicular to said axis of rotation,
- an end wall at the rear end of the tubular side wall and connected with one end of the screw flight,
- said tubular side wall further having a feed opening proximate said end wall and displaced above said front surface of said helical screw flight to form a lip between an edge of the feed opening and said front surface of said helical screw flight, and
- an abrasion resistant insert recessed in said front surface of said screw flight, said abrasion resistant insert having an exposed surface substantially flush with said front surface of said screw flight.
A centrifuge of the type having a cage member mounted within a housing to rotate about an axis of rotation, the cage member having a circumferential screen, the centrifuge further having a scroll member mounted within the cage member to rotate about the axis of rotation, the scroll member having a tubular side wall and an end wall extending outwardly from the tubular side wall, the end wall intersecting one end of a screw flight extending helically relative to the axis of rotation between rear and front ends of the scroll member, the screw flight having a leading edge moving in close proximity with the circumferential screen, and the screw flight further having a front surface generally perpendicular to the axis of rotation, the centrifuge further comprising an abrasion resistant material recessed in the front surface of the screw flight, the abrasion resistant material having an exposed surface substantially flush with the front surface of the screw flight.
A centrifuge of the type having a cage member mounted within a housing to rotate about an axis of rotation, the cage member having a circumferential screen, the centrifuge further having a scroll member mounted within the cage member to rotate about the axis of rotation, the scroll member having a tubular side wall and an end wall connected to a rear end of the tubular side wall, the end wall extending from the tubular side wall and intersecting one end of screw flights extending outwardly from the tubular side wall, each of the screw flights further having a front surface generally perpendicular to the axis of rotation, the centrifuge further comprising feed openings located in the tubular side wall adjacent the end wall and a predetermined displacement above the front surface of the screw flights thereby forming a lip between the front surface of each of the screw flights and an edge of a respective one of the feed openings.
A centrifuge of the type having a cage member mounted within a housing to rotate about an axis of rotation, the cage member having a circumferential screen, the centrifuge further having a scroll member mounted within the cage member to rotate about the axis of rotation, the scroll member having a tubular side wall and an end wall connected to a rear end of the tubular side wall, the end wall extending outward from the tubular side wall and intersecting one end of screw flights extending outwardly from the tubular side wall, the centrifuge further comprising feed openings located in the rear end of the tubular side wall, each of said feed openings has a rear edge flush with a forward directed surface of said end wall.
Dependencies are inferred from the claim text.