A separation disc for a centrifugal separator and a method for manufacturing the separation disc are disclosed. The separation disc is of metal material and adapted to be compressed in a stack of separation discs inside a centrifugal rotor for separating a liquid mixture. The separation disc has a truncated conical shape with an inner surface and an outer surface and a plurality of spacing members extending a certain height above at least one of the inner surface and the outer surface for providing interspaces between mutually adjacent separation discs in the stack. The spacing members are of such small size that each one of them has a width which is less than 2 mm along the surface of the separation disc. The surface of the separation disc is configured with a distribution pattern of the small-sized spacing members, in such a way as to provide equidistant interspaces in the compressed disc stack.

A separation disc for a centrifugal separator and a method for manufacturing the separation disc are disclosed. The separation disc is of metal material and adapted to be compressed in a stack of separation discs inside a centrifugal rotor for separating a liquid mixture. The separation disc has a truncated conical shape with an inner surface and an outer surface and a plurality of spacing members extending a certain height above at least one of the inner surface and the outer surface for providing interspaces between mutually adjacent separation discs in the stack. The spacing members are of such small size that each one of them has a width which is less than 2 mm along the surface of the separation disc. The surface of the separation disc is configured with a distribution pattern of the small-sized spacing members, in such a way as to provide equidistant interspaces in the compressed disc stack.

A centrifugal separator includes a frame and a drive member configured to rotate a rotating part in relation to the frame around an axis of rotation. The rotating part includes a centrifuge rotor closing a separation chamber. The separation chamber includes a stack of separation discs arranged coaxially around the axis of rotation at a distance from each other such as to form passages between each two adjacent separation discs. The stack of separation discs includes a first type of separation discs having an outer diameter of A or below, and at least one separation disc of a second type having outer diameter B or above, wherein diameter B is larger than diameter A. At least one of the separation discs of the second type is arranged at a position in the disc stack that is within the upper 15% of the total number of separation discs and at least one of the first type of separation disc is arranged axially above the uppermost separation disc of the second type.

A centrifugal separator includes a frame and a drive member configured to rotate a rotating part in relation to the frame around an axis of rotation. The rotating part includes a centrifuge rotor closing a separation chamber. The separation chamber includes a stack of separation discs arranged coaxially around the axis of rotation at a distance from each other such as to form passages between each two adjacent separation discs. The stack of separation discs includes a first type of separation discs having an outer diameter of A or below, and at least one separation disc of a second type having outer diameter B or above, wherein diameter B is larger than diameter A. At least one of the separation discs of the second type is arranged at a position in the disc stack that is within the upper 15% of the total number of separation discs and at least one of the first type of separation disc is arranged axially above the uppermost separation disc of the second type.

A stack of separation discs is adapted to be included inside a centrifugal rotor for separating a liquid including a plurality of axially aligned separation discs having a truncated conical shape with an inner surface and an outer surface and a plurality of spot-formed spacing members extending from a base from at least one of the inner surface and the outer surface for providing interspaces between mutually adjacent separation discs in the stack of separation discs. The plurality of separation discs having spot-formed spacing members are arranged so that a majority of said spot-formed spacing members of a disc are displaced compared to the spot-formed spacing members of an adjacent disc. A centrifugal separator including such a stack of separation discs is also disclosed.

A stack of separation discs is adapted to be included inside a centrifugal rotor for separating a liquid including a plurality of axially aligned separation discs having a truncated conical shape with an inner surface and an outer surface and a plurality of spot-formed spacing members extending from a base from at least one of the inner surface and the outer surface for providing interspaces between mutually adjacent separation discs in the stack of separation discs. The plurality of separation discs having spot-formed spacing members are arranged so that a majority of said spot-formed spacing members of a disc are displaced compared to the spot-formed spacing members of an adjacent disc. A centrifugal separator including such a stack of separation discs is also disclosed.

A rotor of a centrifugal separator, including a central shaft, a plurality of identical discs arranged in a stack on the central shaft, the central shaft having on an outer circumference an engagement contour for a rotationally fixed, axially slidable engagement with a corresponding contour on an inner circumference of the discs, the engagement and corresponding contours engageable with one another in multiple rotational positions at a circumferential distance from one another, and each disc having spacing elements situated at a disc circumferential distance from one another, which spacing elements hold each two adjacent discs at an axial distance from one another, forming an intermediate flow gap having a gap dimension. The spacing elements are formed and configured such that, via different rotational positions relative to one another of adjacent discs, at least two different axial dimensions of the flow gap between adjacent discs may be set.

A rotor of a centrifugal separator, including a central shaft, a plurality of identical discs arranged in a stack on the central shaft, the central shaft having on an outer circumference an engagement contour for a rotationally fixed, axially slidable engagement with a corresponding contour on an inner circumference of the discs, the engagement and corresponding contours engageable with one another in multiple rotational positions at a circumferential distance from one another, and each disc having spacing elements situated at a disc circumferential distance from one another, which spacing elements hold each two adjacent discs at an axial distance from one another, forming an intermediate flow gap having a gap dimension. The spacing elements are formed and configured such that, via different rotational positions relative to one another of adjacent discs, at least two different axial dimensions of the flow gap between adjacent discs may be set.

An oil separator that separates mist oil from processing-target gas containing mist liquid includes a plurality of separation disks. The plurality of separation disks rotate around an axis, and are stacked and spaced in an axial direction. The separation disk includes an inner peripheral part and an outer peripheral part. The inner peripheral part forms a surface of a frustum of a hypothetical cone or pyramid coaxial with the separation disk, and is inclined with respect to a radial direction toward one side in an axial direction. The outer peripheral part forms a surface of a frustum of a hypothetical cone or pyramid coaxial with the separation disk, and continuously extends outward from an outer peripheral edge of the inner peripheral part. The outer peripheral part is inclined with respect to the radial direction toward another side in the axial direction.

A disc stack separator and an accelerator disc for a disc stack separator, especially a centrifugal nozzle separator, has curved blades mounted on a cone-shaped shell. The blade configuration assists in directing flow to space for the nozzles in the centrifugal separator bowl in an optimal manner, thus reducing the power consumption of the separator.