Side channel blower, in particular a secondary air blower for an internal combustion machine

Patent metadata

Field	Value
Publication number	US-9297276-B2
Application number	US-201113825554-A
Country	US
Kind code	B2
Filing date	Aug 31, 2011
Priority date	Sep 29, 2010
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

A side channel blower includes a housing comprising a substantially tangential outlet. A housing cover comprises an axial inlet. At least one conveying duct is configured so that the axial inlet fluidly communicates with the outlet. An impeller is driven by a drive unit. The impeller is rotatably supported in the housing and comprises conveying blades which cooperate with the at least one conveying duct. An interruption region is arranged between the outlet and the axial inlet. The interruption region comprises a radially limiting wall and interrupts the at least one conveying duct in a circumferential direction. A first recess is arranged in the radially limiting wall of the interruption region downstream of the outlet. Further recesses are arranged in the interruption region before the axial inlet and after the outlet. A smallest distance between the further recesses is 0.5 to 3 times a distance between two conveying blades.

First claim

What is claimed is:

1. A side channel blower comprising:
a housing comprising an outlet, the outlet being configured to be substantially tangential;
a housing cover comprising an axial inlet;
at least one conveying duct which is configured so that the axial inlet is in a fluid communication with the outlet;
a drive unit;
an impeller which is configured to be driven by the drive unit, the impeller being rotatably supported in the housing and comprising conveying blades, the conveying blades being configured to cooperate with the at least one conveying duct;
an interruption region arranged between the outlet and the axial inlet, the interruption region comprising a radially limiting wall and being configured to interrupt the at least one conveying duct in a circumferential direction;
a first recess arranged in the radially limiting wall of the interruption region downstream of the outlet, as seen in a direction of rotation of the impeller; and
further recesses arranged in the interruption region before the axial inlet and after the outlet, a smallest distance between the further recesses being 0.5 to 3 times a distance between two of the conveying blades.

2. The side channel blower as recited in claim 1 , wherein the smallest distance between the further recesses before the axial inlet and after the outlet is 1.5 times the distance between two of the conveying blades.

3. The side channel blower as recited in claim 1 , wherein the further recesses comprise a second recess which, as seen from the direction of rotation of the impeller, adjoins the first recess in the radially limiting wall of the interruption region, and a depth of the second recess is less than a depth of the first recess.

4. The side channel blower as recited in claim 3 , wherein the at least one conveying duct is arranged in part in the housing cover, the second recess is configured to extend in the radially limiting wall of the interruption region over a height of the at least one conveying duct, and a height of the second recess constantly decreases in a direction of the axial inlet.

5. The side channel blower as recited in claim 1 , wherein the further recesses comprise a third recess arranged upstream of the axial inlet at the interruption region, as seen in the direction of rotation of the impeller, and the interruption region further comprises an upper edge, wherein the third recess is in a fluid communication with the axial inlet, and a depth of the third recess constantly increases from the upper edge of the interruption region facing the impeller to the axial inlet.

6. The side channel blower as recited in claim 5 , wherein a width of the third recess before the axial inlet substantially corresponds to a radial extension of the conveying blades.

7. The side channel blower as recited in claim 5 , wherein the third recess further comprises a limiting edge, and a depth of the third recess constantly increases radially outward up to the limiting edge of the third recess.

8. The side channel blower as recited in claim 7 , wherein the limiting edge of the third recess comprises a first portion arranged before the axial inlet in which a width of the third recess substantially corresponds to the radial extension of the conveying blades, and an adjoining second portion which is angled radially inward with respect to the first portion, as seen from the direction of rotation of the impeller.

9. The side channel blower as recited in claim 1 , wherein the side channel blower is provided as a secondary air blower for an internal combustion machine.

Assignees

• Herrmann Berthold
• Peters Rainer
• Pierburg Gmbh

Inventors

• Herrmann Berthold
• Peters Rainer

Classifications

• F04D23/008 Primary

  Regenerative pumps (for liquids or for liquids and elastic fluids F04D5/002) · CPC title

• F04D29/667

  by influencing the flow pattern, e.g. suppression of turbulence · CPC title

• F01D25/24 Primary

  Casings (modified for heating or cooling F01D25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F16M {; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045}) · CPC title

• F04D29/161

  especially adapted for elastic fluid pumps · CPC title