Centrifugal-force separator and filter arrangement having a centrifugal-force separator of said type

Patent metadata

Field	Value
Publication number	US-9782701-B2
Application number	US-201414312380-A
Country	US
Kind code	B2
Filing date	Jun 23, 2014
Priority date	Dec 23, 2011
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A centrifugal-force separator for separating particles from a fluid has a housing having an inflow opening and an outflow opening. An axial core and a plurality of guide blades connected to the axial core are provided, wherein the axial core and the guide blades are disposed in the housing. The guide blades generate a turbulent flow of a fluid flowing in through the inlet opening into the housing in an inflow direction. The guide blades extend radially between a first helical line at the axial core and a second helical line at a housing wall of the housing. A first pitch of the first helical line is greater than a second pitch of the second helical line.

First claim

What is claimed is:

1. A centrifugal-force separator for separating particles from a fluid, the centrifugal-force separator comprising:
a housing having an inflow opening and an outflow opening;
an axial core and a plurality of guide blades connected to the axial core, wherein the axial core and the guide blades are disposed in the housing;
the guide blades configured to generate a turbulent flow of a fluid flowing in through the inflow opening into the housing in an inflow direction;
the guide blades extending radially between a first helical line at the axial core and a second helical line at a housing wall of the housing;
wherein a first pitch of the first helical line is greater than a second pitch of the second helical line;
wherein the first pitch is greater by at least 5% than the second pitch.

2. The centrifugal-force separator according to claim 1 , wherein
the guide blades each have a leading edge and a trailing edge,
wherein at least one of the leading edge and the trailing edge is located in a cross-sectional area of the housing that is substantially perpendicular to the inflow direction of the fluid.

3. The centrifugal-force separator according to claim 2 , wherein
the axial core extends along a longitudinal axis;
wherein the trailing edge of a guide blade of the plurality of guide blades has a radially inner portion of the trailing edge nearest the axial core and a radially outer portion nearest the housing wall;
wherein the radially inner portion of the trailing edge nearest the axial core is angularly displaced about the longitudinal axis in an angular position different from the radially outer portion of the trailing edge nearest the housing wall, relative to the longitudinal axis;
wherein the guide blade has a first sweep angle defined between the guide blade leading edge and radially inner portion of the trailing edge nearest the axial core;
wherein the guide blade has a second sweep angle defined between the guide blade leading edge and radially outer portion of the trailing edge nearest the housing wall; wherein the first sweep angle is different from the second sweep angle.

4. The centrifugal-force separator according to claim 3 , wherein the first sweep angle is smaller than the second sweep angle.

5. The centrifugal-force separator according to claim 1 , wherein
a leading edge of a first one of the guide blades has a first spacing relative to a cross-sectional area of the housing that is substantially perpendicular to the inflow direction of the fluid and a leading edge of a second one of the guide blades has a second spacing relative to said cross-sectional area of the housing,
wherein said first spacing and said second spacing are different from each other.

6. The centrifugal-force separator according to claim 1 , wherein
at least two of the guide blades have a different length relative to each other.

7. The centrifugal-force separator according to claim 1 , wherein
at an inflow side of the housing a first one of the guide blades has a first spacing from the inflow opening in the inflow direction and a second one of the guide blades has a second spacing from the inflow opening in the inflow direction,
wherein the first and the second spacings are different from each other.

8. The centrifugal-force separator according to claim 1 , wherein
at least a portion of the housing from the inflow opening and the outflow opening is sleeve-shaped or tubular,
wherein the guide blades and the axial core form a cylindrical guide blade apparatus that is inserted in the housing.

9. The centrifugal-force separator according to claim 1 , wherein
the guide blades are stationary.

10. The centrifugal-force separator according to claim 1 , wherein
a thickness of at least one of the guide blades changes in a direction from the axial core toward the housing wall.

11. The centrifugal-force separator according to claim 1 , wherein
a thickness of at least one of the guide blades changes along a length of said at least one guide blade.

12. The centrifugal-force separator according to claim 1 , wherein
an inflow profile of at least one of the guide blades is curved.

13. The centrifugal-force separator according to claim 1 ,
wherein the plurality of guide blades is exactly six guide blades.

14. The centrifugal-force separator according to claim 1 , wherein
the axial core defines a housing axis;
wherein, when the plurality of guide blades in the housing are viewed along the housing axis from the inflow opening or from the outflow opening, a gap is visible between a leading edge of a first guide blade and the trailing edge of an adjacent second guide blade such that first and second guide blades do not overlap each other.

15. The centrifugal-force separator according to claim 1 , wherein
the axial core is longer in an axial direction of the housing than the guide blades.

16. The centrifugal-force separator according to claim 1 , wherein
a ratio of a core diameter of the axial core and a spacing that is measured between the housing wall and the axial core is between 2 and 4.

17. The centrifugal-force separator according to claim 1 , wherein
a cross-sectional area of the housing increases in a flow direction of the fluid through the housing.

18. The centrifugal-force separator according to claim 1 , further comprising
an immersion tube disposed in the housing, wherein the immersion tube tapers cross-sectionally from the outflow opening in a direction toward the inflow opening.

19. The centrifugal-force separator according to claim 18 , further comprising
an immersion tube plate, wherein the immersion tube is secured at the outflow opening by the immersion tube plate.

20. The centrifugal-force separator according to claim 1 , further comprising
a particle discharge opening in the housing wall, wherein the particle discharge opening, relative to a longitudinal axis of the housing, opens a predetermined angular section in the housing wall.

21. A filter device comprising:
a filter device housing comprising a plurality of filter device housing openings;
a plurality of centrifugal-force separators, each according to claim 1 disposed in the filter device housing, wherein the plurality of centrifugal-force separators are disposed within respective ones of the plurality of filter device housing openings;
the filter device housing comprising an outflow section separated fluid-tightly from the filter device housing openings;
wherein the outflow openings of the centrifugal-force separators are coupled to the outflow section.

22. The filter device according to claim 21 , comprising
a discharge section that is separated fluid-tightly from the filter device housing openings and from the outflow section,
wherein the plurality of centrifugal-force separators each have a particle discharge window,
wherein the discharge section communicates with the particle discharge windows of the centrifugal-force separators.

Assignees

• Mann & Hummel Gmbh

Inventors

• Ackermann Steffen
• Greif Volker
• Kraxner Michael
• Muschelknautz Ulrich

Classifications

• B04C3/04

  Multiple arrangement thereof {(combined with types according to other groups, B04C7/00)} · CPC title

• B04C3/06 Primary

  Construction of inlets or outlets to the vortex chamber · CPC title

• B04C2003/006

  Construction of elements by which the vortex flow is generated or degenerated · CPC title

• B01D21/26 Primary

  Separation of sediment aided by centrifugal force {or centripetal force}(centrifuges B04B; cyclones B04C) · CPC title