Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Turbine regenerative pump
Patent
1998-12-09
2000-06-06
Look, Edward K.
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Turbine regenerative pump
415 551, 415 552, 415 553, 237 123C, F01D 112
Patent
active
060710713
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention pertains to a side-channel fan, especially for feeding combustion air in a parking heater or auxiliary heater of a motor vehicle, with a fan body part in an axial connection to an impeller, wherein the fan body part has an inlet channel and an outlet channel and a bent side channel connecting the inlet channel to the outlet channel on the axial connection side of the impeller, and an interrupter, which together form the 360.degree. circumference of the axial connection side.
BACKGROUND OF THE INVENTION
A side-channel fan of the above-described type has been known from DE 42 30 014 C1. The interrupter has baffling means in the form of material recesses, e.g., notch-like recesses, which reduce the generation of noise during the operation of the fan.
The difficult and expensive manufacture of the fan body is a drawback. Complex, spatially difficult flow channels and baffling means can be prepared only by casting or mechanical surface finishing. Flow optimization and noise optimization or minimization are therefore possible at an acceptable expense to a limited extent only.
SUMMARY AND OBJECTS OF THE INVENTION
The object of the present invention is to provide a side-channel fan of the type described in the introduction, which makes it possible to optimize the noise and flow by means of simple means.
According to the invention, a side-channel fan is provided especially for feeding combustion air in a parking heater of a motor vehicle. The fan includes a fan body part in an axial connection to an impeller. The fan body part has an inlet channel and an outlet channel and, on the axial connection side of the impeller, a bent (or curved) side channel connecting the inlet channel to the outlet channel, and an interrupter, which together form the 360.degree. circumference of the axial connection side. At least one of the openings connecting the side channel to the inlet channel and to the outlet channel is provided with a cover in the area of the axial connection side. The entire surface of the cover is located opposite the axial connection side or surface of the impeller and is arranged deeper, i.e., at a distance (d), in relation to the axial connection side.
The essence of the present invention is the design of a set-back cover in the area of at least one of the openings, which connect the side channel to the inlet channel and to the outlet channel. The cover is located on the axial connection side of the impeller directly connected to the interrupter and is set back in relation to the interrupter. The amount of the setback is, in particular, 0.3 mm.
The cover is preferably a separate component, which is fastened to the edge of the interrupter and/or the edge of the side channel by means of fastening means. The fastening means are preferably bolts, which engage cored holes of the fan body part. Detachable or nondetachable fastening means may be provided, in general.
An arrangement of an especially simple design is obtained if the cover is a plate.
The cover advantageously has at least one curved air guide section, which is made in one piece or fastened and is located on the side of the cover facing the opening of the inlet or outlet channel.
The edge of the cover facing the side channel may also have a tapered air flow edge in a correspondingly flow-optimized manner.
For noise minimization, the aforementioned edge preferably has at least one nonstraight shaped projection and/or a corresponding negative recess, when viewed from the top in the direction of the axis of the impeller.
However, the edge of the cover facing the side channel may also have a wave shape or another shape when viewed from the top and its shape is determined, in particular, by experiments.
A compact arrangement and a simple possibility of fastening is obtained if the cover is designed as an essentially sector-shaped cover when viewed from the top.
The cover is preferably a plastic or metal part, especially one made of aluminum.
The cover, which is preferably made as a one-piece casting, may h
REFERENCES:
patent: 3324799 (1967-06-01), Terrano
patent: 3951567 (1976-04-01), Rohs
J. Eberspacher GmbH & Co.
Look Edward K.
McDowell Lian
LandOfFree
Side-channel fan, in particular for supplying combustion air in does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Side-channel fan, in particular for supplying combustion air in , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Side-channel fan, in particular for supplying combustion air in will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2209168