Centrifugal separator having an inlet with wear resistance members, and a feed zone element with wear resistance members

A centrifugal separator, comprising:

• a body rotatable in a direction of rotation around a preferably horizontal axis of rotation, said axis of rotation extending in a longitudinal direction of said body, said body comprising a bowl and a screw conveyor arranged coaxially within said bowl, and said screw conveyor being rotatable about said axis of rotation, said screw conveyor comprising a core body carrying at least one helical winding;
• wherein an inlet chamber is provided in the core body;
• a separation chamber being radially outwards limited by said bowl and radially inwards limited by an outer circumference of said core body, said inlet chamber comprising two cross walls, namely a proximal cross wall and a distal cross wall, and at least two longitudinal walls extending in the longitudinal direction between the proximal cross wall and the distal cross wall, said proximal cross wall comprising a central opening for inlet of feed material into the inlet chamber, feed ports for inlet of feed material into the separation chamber from the inlet chamber being present between adjacent longitudinal walls, the cross walls and the longitudinal walls having internal surfaces within the outer circumference of the core body, said internal surfaces facing the inlet chamber;
• a feed path extending from the central opening, through the inlet chamber and out through the feed ports, and;
• wear resistance members insertable through the feed ports fully screen the internal surfaces of the distal cross wall and the longitudinal walls from the feed path, and in that the wear resistance members comprise a longitudinal wall member at each longitudinal wall, said longitudinal wall member comprising a curved longitudinal portion screening at least a part of the internal surface of the longitudinal wall, and at least one flange portion screening a part of the distal cross wall.

A feed zone element for mounting in a core body of a screw conveyor of a centrifugal separator, comprising:

• a body rotatable in a direction of rotation around a horizontal axis of rotation, said axis of rotation extending in a longitudinal direction of said rotating body, said rotating body comprising a bowl and said screw conveyor arranged coaxially within said bowl, and the screw conveyor being rotatable around said axis of rotation, said screw conveyor comprising said core body carrying at least one helical winding, a separation chamber being radially outwards limited by said bowl and radially inwards limited by an outer circumference of said core body;
• wherein an inlet chamber is provided by said feed zone element, said inlet chamber comprising two cross walls, namely a proximal cross wall and a distal cross wall, and at least two longitudinal walls extending in the longitudinal direction between the proximal cross wall and the distal cross wall, said proximal cross wall comprising a central opening for inlet of feed material into the inlet chamber, feed ports for inlet of feed material into the separation chamber from the inlet chamber being present between adjacent longitudinal walls, the cross walls and the longitudinal walls having internal surfaces within the outer circumference of the core body, said internal surfaces facing the inlet chamber, a feed path extending from the central opening, through the inlet chamber and out through the feed ports,
• and wear resistance members insertable through the feed ports fully screen the internal surfaces of the distal cross wall and the longitudinal walls from the feed path, and in that the wear resistance members comprise a longitudinal wall member at each longitudinal wall, said longitudinal wall member comprising a curved longitudinal portion screening at least a portion of the internal surface of the longitudinal wall, and at least one flange portion screening a part of the distal cross wall.