Fan arrangement

Patent metadata

Field	Value
Publication number	US-9334877-B2
Application number	US-201213706384-A
Country	US
Kind code	B2
Filing date	Dec 6, 2012
Priority date	Dec 6, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

A fan arrangement ( 1 ), in particular for cooling an engine system, comprising: an impeller ( 10 ) having one or more blades ( 4 ) which in operation convey a medium in the direction of an axis of rotation of the impeller ( 10 ) from an inlet side (E) to an outlet side (A); a housing shroud ( 6 ) having a base part ( 61 ) which extends in the direction of the axis of rotation and surrounds the impeller ( 10 ) completely or partially, wherein, on an end of the base part ( 61 ) oriented towards the outlet side (A) of the impeller ( 10 ), there is provided a discharge flow element ( 63 ) which extends radially outwards from the end of the base part ( 61 ).

First claim

The invention claimed is:

1. A fan arrangement ( 1 ) comprising:
an impeller ( 10 ) having one or more blades ( 4 ) which in operation convey a medium in the direction of an axis of rotation of the impeller ( 10 ) from an inlet side (E) to an outlet side (A) of the impeller; and
a housing shroud ( 6 ) having a base part ( 61 ) which extends in the direction of the axis of rotation and surrounds the impeller ( 10 ) at least partially,

wherein on an end of the base part ( 61 ) oriented towards the outlet side (A) of the impeller ( 10 ) there is provided a discharge flow element ( 63 ) which extends radially outwards from said end of the base part ( 61 ), and further extends in a direction oblique to the axis of rotation and towards the inlet side (E) of the impeller ( 10 ) to define a terminal end section, and
wherein a reverse flow guide section ( 62 ) extending radially inwards is provided on an end of the base part ( 61 ) oriented towards the inlet side (E) of the impeller ( 10 ),
wherein an annular element ( 5 ) which connects outer ends of the blades ( 4 ) to one another is provided with an end on the inlet side (E) which projects outwardly and ends radially further outwards than a free end of the reverse flow guide section ( 62 ) such that the end of the annular element ( 5 ) is at least partially contained within the reverse flow guide section ( 62 ) and the end of the annular element ( 5 ) is shaped to taper an axially extending reverse flow channel ( 7 ) formed between the annular element ( 5 ) and the base part ( 61 ) of the housing shroud ( 6 ).

2. The fan arrangement ( 1 ) according to claim 1 , wherein the base part ( 61 ) surrounds the impeller ( 10 ) concentrically.

3. The fan arrangement ( 1 ) according to claim 1 , wherein the discharge flow element ( 63 ) is arranged on the base part ( 61 ) over a full circumference of the base part.

4. The fan arrangement ( 1 ) according to claim 1 , wherein the discharge flow element ( 63 ) ends with the outlet side (A) of the impeller ( 10 ).

5. The fan arrangement ( 1 ) according to claim 1 , wherein the discharge flow element is arranged between the inlet side (E) and the outlet side (A) with respect to the axial direction.

6. The fan arrangement ( 1 ) according to claim 1 , wherein the discharge flow element ( 63 ) is arranged on an end of the base part ( 61 ) which projects beyond the outlet side (A) of the impeller ( 10 ).

7. A system comprising:
arrangement ( 1 ) according to claim 1 , and
a cooling device ( 9 ),

wherein the fan arrangement ( 1 ) is arranged in such a way that in operation a medium is first aspirated through the cooling device ( 9 ) and that medium conveyed into an intermediate space ( 12 ) between the fan arrangement ( 1 ) and a rebound surface ( 16 ) is discharged transversely to the direction of the axis of rotation.

8. The fan arrangement ( 1 ) according to claim 1 , wherein the discharge flow element ( 63 ) is arranged on the base part ( 61 ) zonally.

Assignees

• Bosch Gmbh Robert

Inventors

• Nicholls Stephen
• Hansen Sebastian
• Burkart Michael

Classifications

• F04D29/58

  Cooling (of machines or engines in general F01P); Heating; Diminishing heat transfer {(for the motor of air-pump units F04D25/082; cooling of shafts or bearings F04D29/04)} · CPC title

• F04D29/582

  specially adapted for elastic fluid pumps · CPC title

• F04D29/541 Primary

  Specially adapted for elastic fluid pumps (F04D29/56 takes precedence) · CPC title

• F04D29/52 Primary

  for axial pumps · CPC title