Rotor unit for a centrifugal separator having undetachably joined separating discs

Patent metadata

Field	Value
Publication number	US-9550192-B2
Application number	US-201213547643-A
Country	US
Kind code	B2
Filing date	Jul 12, 2012
Priority date	Apr 4, 2006
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

A rotor unit for a centrifugal separator, which centrifugal separator comprises a non-rotatable housing wherein the rotor unit is disposed about a central axis of rotation, an inlet for supply of a mixture of components to be separated, at least one outlet for a component separated during operation, whereby the rotor unit, at least parts of which are made of metal, comprises a separating chamber formed inside the rotor unit, an inlet chamber connected to the inlet and the separating chamber, is formed radially within said separating chamber and is usually shielded from the separating chamber, at least one outlet connected to the separating chamber, a plurality of separating discs disposed at a distance axially from one another in said separating chamber coaxially with the axis of rotation, at least a number of the metal parts of said rotor unit are undetachably joined together to form a composite assembly.

First claim

What is claimed is:

1. A rotor unit for a centrifugal separator, which centrifugal separator comprises a non-rotatable housing in which the rotor unit is disposed about a central axis of rotation, an inlet for supply to the rotor unit of a mixture of components which are to be separated, and at least one outlet for a component separated during operation in the rotor unit, whereby the rotor unit comprises:
a separating chamber formed inside the rotor unit;
an inlet chamber which is connected to the inlet and to the separating chamber, and which is formed radially within said separating chamber;
at least one outlet connected to the separating chamber;
a plurality of separating discs made of metal and disposed at a distance axially from one another in said separating chamber coaxially with the axis of rotation, and wherein at least two of the plurality of separating discs are undetachably joined together;
the at least two of the separating discs being joined together by soldering; and
a solder joint formed by soldering constituting a dividing wall between the inlet chamber and the separating chamber.

2. A rotor unit according to claim 1 , wherein the separating discs are made of stainless steel and the-soldering is done with a corrosion-resistant solder.

3. A rotor unit according to claim 1 , wherein the separating discs are made of stainless steel and the soldering is done with a copper-based solder, a nickel-based solder, or an iron-based solder.

4. A rotor unit according to claim 1 , wherein the dividing wall extends axially and surrounds the rotor axis, and the dividing wall shields the inlet chamber from the separating chamber.

5. A rotor unit according to claim 4 , wherein the rotor unit when assembled also comprises said dividing wall, which is joined to at least part of the separating discs at their radially inner portions.

6. A rotor unit according to claim 5 , wherein the dividing wall is constituted by assembly joints, surrounding the axis of rotation, between all the pairs of mutually adjacent separating discs.

7. A rotor unit according to claim 5 , wherein the assembled rotor unit also comprises entrainment members disposed radially within, and joined to, the dividing wall.

8. A rotor unit according to claim 7 , wherein the entrainment members comprise inlet discs disposed coaxially with the axis of rotation in the inlet chamber and arranged for entrainment of the liquid mixture during operation of the rotor unit.

9. A rotor unit according to claim 7 , wherein said entrainment members take the form of parts of inner portions of said separating discs.

10. A rotor unit according to claim 7 , wherein the entrainment members comprise blades extending radially and axially.

11. A rotor unit according to claim 7 , wherein parts of said at least one outlet define a space containing the separation discs.

12. A rotor unit according to claim 1 , wherein the at least two separating discs are joined to one another at least at spacing members, which spacing members form part of the separating discs.

13. A rotor unit according to claim 1 , wherein all the separating discs in the rotor unit are identical.

14. A rotor unit according to claim 1 , wherein the assembled rotor unit also comprises an outer dividing wall which is joined to at least part of the separating discs at their radially outer portions.

15. A rotor unit according to claim 14 , wherein said dividing wall constitutes a rotor housing that joins the separating discs together at radially outer edges thereof.

16. A rotor unit for a centrifugal separator, which centrifugal separator comprises a non-rotatable housing in which the rotor unit is disposed about a central axis of rotation, an inlet for supply to the rotor unit of a mixture of components which are to be separated, and at least one outlet for a component separated during operation in the rotor unit, whereby the rotor unit comprises:
a separating chamber formed inside the rotor unit;
an inlet chamber which is connected to the inlet and to the separating chamber, and which is formed radially within said separating chamber;
at least one outlet connected to the separating chamber;
a plurality of separating discs made of metal and disposed at a distance axially from one another in said separating chamber coaxially with the axis of rotation, and wherein at least two of the plurality of separating discs are undetachably joined together;
the inlet chamber being shielded from the separating chamber by a dividing wall extending axially and surrounding the rotor axis; and
a solder joint formed by soldering constituting the dividing wall between the inlet chamber and the separating chamber.

17. A rotor unit according to claim 16 , wherein the at least two of the separating discs are joined together by the soldering.

18. A rotor unit according to claim 17 , wherein the separating discs are made of stainless steel and the at least two of the soldering is done with a corrosion-resistant solder.

19. A rotor unit according to claim 17 , wherein the separating discs are made of stainless steel and the soldering is done with a copper-based solder, a nickel-based solder, or an iron-based solder.

20. A rotor unit according to claim 16 , wherein the at least two separating discs are joined to one another at least at spacing members, which spacing members form part of the separating discs.

21. A rotor unit according to claim 16 , wherein the rotor unit when assembled also comprises said dividing wall, which is joined to at least part of the separating discs at their radially inner portions.

22. A rotor unit according to claim 21 , wherein the dividing wall is constituted by assembly joints, surrounding the axis of rotation, between all the pairs of mutually adjacent separating discs.

23. A rotor unit according to claim 21 , wherein the assembled rotor unit also comprises entrainment members disposed radially within, and joined to, the dividing wall.

24. A rotor unit according to claim 23 , wherein the entrainment members comprise inlet discs disposed coaxially with the axis of rotation in the inlet chamber and arranged for entrainment of the liquid mixture during operation of the rotor unit.

25. A rotor unit according to claim 23 , wherein said entrainment members take the form of parts of inner portions of said separating discs.

26. A rotor unit according to claim 23 , wherein the entrainment members comprise blades extending radially and axially.

27. A rotor unit according to claim 23 , wherein parts of said at least one outlet define a space containing the separation discs.

28. A rotor unit according to claim 16 , wherein all the separating discs in the rotor unit are identical.

29. A rotor unit according to claim 16 , wherein the rotor unit when assembled also comprises an outer dividing wall which is joined to at least part of the separating discs at their radially outer portions.

30. A rotor unit according to claim 29 , wherein said dividing wall constitutes a rotor housing that joins the separating discs together at radially outer edges thereof.

31. A rotor unit for a centrifugal separator, which centrifugal separator comprises a non-rotatable housing in which the rotor unit is disposed about a central axis of rotation, an inlet for supply to the rotor unit of a mixture of components which are t

Assignees

• Klintenstedt Kjell
• Alfa Laval Corp Ab

Inventors

• Klintenstedt Kjell

Classifications

• B04B1/08 Primary

  of conical shape · CPC title

• B04B7/14

  for separating walls of conical shape · CPC title

• B04B7/085

  fibre- or metal-reinforced · CPC title

• B04B7/08 Primary

  Rotary bowls (centrifugal casting machines B22D) · CPC title