CH149509A - Centrifugal fan for conveying hot gases, especially flue gases. - Google Patents
Centrifugal fan for conveying hot gases, especially flue gases.Info
- Publication number
- CH149509A CH149509A CH149509DA CH149509A CH 149509 A CH149509 A CH 149509A CH 149509D A CH149509D A CH 149509DA CH 149509 A CH149509 A CH 149509A
- Authority
- CH
- Switzerland
- Prior art keywords
- centrifugal fan
- shaft
- gases
- conveying hot
- cone
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
- F04D17/162—Double suction pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Zentrifugalventilator zum Fördern von heissen Gasen, insbesondere Rauchgasen. Die Erfindung betrifft einen Zentrifugal ventilator zum Fördern von heissen - Gasen, insbesondere Rauchgasen und besteht darin, dass der das Fördermittel im Laufrad aus der acbsialen in die radiale Strömungsrich tung überführende Kegel mit der der Ein trittsseite zugekehrten Spitze, unter Freilas sung eines die Welle umschliessenden, in der Nähe der Schaufeln an den Saugraum ange schlossenen Ringraumes, aus dem Gehäuse herausragt, zum Zweck, durch die heraus ragende Spitze Frischluft durch den Ring raum saugen und dadurch die Welle kühlen zu können.
Der aus Blech hergestellte Kegel kann an der aus dem Gehäuse herausragen den Spitze und an der bei den Schaufeln sich befindenden Basis mit je mindestens einer Reihe von Löchern versehen sein. Zweck mässig wird zwischen der Spitze des Kegels und dem Wellenlager ein Schirm derart an geordnet, dass ein Ansaugen von Schmieröl aus dem Lager vermieden wird.
Ein Ausführungsbeispiel des Erfindungs gegenstandes ist auf der Zeichnung im Schnitt dargestellt. a ist das Gehäuse, b das Laufrad, c die Welle und a' sind die Lager eines Zentrifu- galventilators zum Absaugen von heissen Rauchgasen, bei dem die in achsialer Rich tung in das Laufrad eintretenden Rauchgase in üblicher Weise durch Kegel e in die ra diale Strömungsrichtung in den Schaufeln übergeführt werden.
Die Kegel sind mit ihren Spitzen f unter Freilassung je eines die Welle umgebenden Ringraumes g durch die Gehäusewände hindurchgeführt und sowohl am herausragenden Teil, wie auch an der bei den Schaufeln sich befindenden Basis mit Öffnungen h bezw. i versehen. Durch die Öffnungen h wird aus der Atmosphäre Frisch luft angesaugt, die beim Passieren des Ring raumes die Welle kühlt und daraufhin durch die Öffnungen i den heissen Rauchgasen bei gemischt wird. Auf diese Weise werden die Welle und die Lager vor unzulässiger Erhitzung durch die Rauchgase geschützt. Zwischen den Kegelspitzen und den Lagern sind Schirme k angeordnet, die den Zweck haben, ein Ansaugen von Schmieröl aus den Lagern durch die Kegel zu vermeiden.
Centrifugal fan for conveying hot gases, especially flue gases. The invention relates to a centrifugal fan for conveying hot gases, in particular flue gases, and consists in the fact that the cone with the tip facing the inlet side facing the cone that transfers the conveying means in the impeller from the acbsial to the radial flow direction, leaving a shaft surrounding the shaft , in the vicinity of the blades to the suction chamber closed annulus, protrudes from the housing, for the purpose of sucking fresh air through the annulus through the protruding tip and thereby being able to cool the shaft.
The cone made of sheet metal can be provided with at least one row of holes at the tip protruding from the housing and at the base located at the blades. Appropriately, a screen is arranged between the tip of the cone and the shaft bearing in such a way that a suction of lubricating oil from the bearing is avoided.
An embodiment of the subject invention is shown in section on the drawing. a is the housing, b the impeller, c the shaft and a 'are the bearings of a centrifugal fan for extracting hot smoke gases, in which the smoke gases entering the impeller axially through cones e into the ra diale Direction of flow in the blades are transferred.
The cones are passed through the housing walls with their tips f, leaving an annular space g surrounding the shaft free, and both on the protruding part as well as on the base with openings h and on the base of the blades. i provided. Fresh air is sucked in from the atmosphere through the openings h, which cools the shaft as it passes through the annular space and is then mixed with the hot flue gases through the openings i. In this way, the shaft and the bearings are protected from inadmissible heating by the smoke gases. Shields k are arranged between the cone tips and the bearings, the purpose of which is to prevent the cones from sucking in lubricating oil from the bearings.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH149509T | 1930-07-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH149509A true CH149509A (en) | 1931-09-15 |
Family
ID=4405125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH149509D CH149509A (en) | 1930-07-25 | 1930-07-25 | Centrifugal fan for conveying hot gases, especially flue gases. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH149509A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2518815A (en) * | 1947-10-08 | 1950-08-15 | American Blower Corp | Cooling means for axial fans |
US3297239A (en) * | 1965-04-29 | 1967-01-10 | Fly Ash Arrestor Corp | Cooling system for shafts and the like |
EP0799979A1 (en) * | 1995-10-19 | 1997-10-08 | Hitachi Construction Machinery Co., Ltd. | Engine cooler and construction machines |
EP3536971A1 (en) * | 2017-10-10 | 2019-09-11 | TTI (Macao Commercial Offshore) Limited | Backpack blower |
-
1930
- 1930-07-25 CH CH149509D patent/CH149509A/en unknown
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2518815A (en) * | 1947-10-08 | 1950-08-15 | American Blower Corp | Cooling means for axial fans |
US3297239A (en) * | 1965-04-29 | 1967-01-10 | Fly Ash Arrestor Corp | Cooling system for shafts and the like |
EP0799979A1 (en) * | 1995-10-19 | 1997-10-08 | Hitachi Construction Machinery Co., Ltd. | Engine cooler and construction machines |
EP0799979A4 (en) * | 1995-10-19 | 2000-03-29 | Hitachi Construction Machinery | Engine cooler and construction machines |
EP3536971A1 (en) * | 2017-10-10 | 2019-09-11 | TTI (Macao Commercial Offshore) Limited | Backpack blower |
US11156224B2 (en) | 2017-10-10 | 2021-10-26 | Tti (Macao Commercial Offshore) Limited | Backpack blower |
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