DE897749C - Screw fan made from sheet metal - Google Patents
Screw fan made from sheet metalInfo
- Publication number
- DE897749C DE897749C DEK11640A DEK0011640A DE897749C DE 897749 C DE897749 C DE 897749C DE K11640 A DEK11640 A DE K11640A DE K0011640 A DEK0011640 A DE K0011640A DE 897749 C DE897749 C DE 897749C
- Authority
- DE
- Germany
- Prior art keywords
- sheet metal
- hub
- screw
- fan
- wing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Gegenstand der Erfindung bildet .ein .aus Blechen hergestellter Schraubenlüfter, der sich von den bisher bekannten aus Blechen bestehenden Lüftern durch besonders hohe Steifigkeit der Flügel und eine , g ,eringe und günstige Beanspruchung der Schweißnähte auszeichnet, so daß Schwingungsbrüche in besonders hohem Maße vermieden werden. Bei den bisher bekannten Schraubenlüftern waren dieFlügel einer Ausführungsform an einem Radstern befestigt, dessen Zacken der Schraubensteigung -,.entsprechend verwunden waren. Wurden diese Lüfter mit verhältnismäßig langen Flügeln .ausgeführt, so neigten diese Flügel zum Flattern, und es traten entweder an den Wurzeln der Flügel oder der Radsterne Schwingungsbrüche ein. Die Radsterne mußten daher aus verhältnismäßig starkem Blech hergestellt werden, wodurch diese aber sehr schwer ausfielen.The subject of the invention is a screw fan made from sheet metal. which differs from the fans made of sheet metal known up to now by particularly high rigidity of the wings and a, g, eringe and favorable stress on the Distinguishes weld seams, so that vibration fractures are avoided to a particularly high degree will. In the previously known screw fans, the blades have been one embodiment attached to a wheel spider, the prongs of which correspond to the pitch of the screw were wounded. If these fans were designed with relatively long blades, so these wings tended to flap, and it either occurred at the roots of the Wing or wheel spider vibration fractures. The wheel stars therefore had to be turned off relatively strong sheet metal are made, which makes them very difficult failed.
Bekannt sind ferner auch Schraubenlüfter, bei welchen zwecks Versteifung die in ihrer Längsrichtung gekrümmten Flügel stumpf auf eine trommelförmige Nabe von verhältnismäßig geringer Wandstärke geschweißt wurden. Durch diese Schweißung wurde jedoch das Gefüge an der Stelle .der größten Beanspruchung verändert, so daß auch bei dieser Ausführungsform Schwingungsbrüchkeine Seltenheit waren.Also known are screw fans, in which for the purpose of stiffening the blades curved in their longitudinal direction butt onto a drum-shaped hub were welded from a relatively small wall thickness. Through this weld However, the structure was changed at the point of greatest stress, so that In this embodiment too, vibration fractures were not uncommon.
Durch den Gegenstand der Erfindung, der in der Zeichnung dargestellt ist, werden diese Nachteile vermieden.By the subject matter of the invention shown in the drawing these disadvantages are avoided.
Abb. t ist ein Schnitt A-B-C durch den Schraubenlüfter; Abb. a ist eine Ansicht in Achsrichtung auf den sechsflügligen Lüfter.Fig. T is section A-B-C through the screw fan; Fig.a is a view in the axial direction of the six-blade fan.
Es bezeichnet a die beiden durch Pressen od. dgl. erzeugten topfförmigen Teile, die mit ihren Böden b zusammenstoßen und an den jeweils von Mantel und Bodengebildeten Kanten bei c verschweißt werden. Auf diese die Nabe des Lüfters bildenden Teile werden die Flügel d aufgesetzt, die an ihrer Wurzel den Bördelrand e aufweisen und an dessen freien Rändern, und zwar-nur an diesen, mit der Nabe verschweißt -,verden. Auf einer Seite der Flügel sind ferner die Flügelstützen f angeordnet, und zwar so, daß sie auf d.-Ir Nabe einen Abstand ä aufweisen. Auch diese Flügelstützen erhalten an dem der Nabe zugekehrten Ende einen Bördelrand la, bei welchem ebenfalls nur die frjen Ränder mit der Nabe verschweißt werden. Das am Flügel anliegende Ende der Flügelstütze kann durch Punktschweißung i, durch Nietung od. dgl. befestigt werden.It denotes a the two pot-shaped ones produced by pressing or the like Parts that collide with their bottoms b and that formed by the coat and the bottom Edges are welded at c. On these parts forming the hub of the fan the wings d are placed, which have the beaded edge e at their roots and at its free edges, namely - only at these, welded to the hub - verden. The wing supports f are also arranged on one side of the wing so that they are at a distance ä on d.-Ir hub. Also received these wing supports at the end facing the hub a flange la, in which also only the front edges are welded to the hub. The end adjacent to the wing the wing support can be fastened by spot welding i, riveting or the like will.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK11640A DE897749C (en) | 1951-10-16 | 1951-10-16 | Screw fan made from sheet metal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK11640A DE897749C (en) | 1951-10-16 | 1951-10-16 | Screw fan made from sheet metal |
Publications (1)
Publication Number | Publication Date |
---|---|
DE897749C true DE897749C (en) | 1953-11-23 |
Family
ID=7213418
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK11640A Expired DE897749C (en) | 1951-10-16 | 1951-10-16 | Screw fan made from sheet metal |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE897749C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1084273B (en) * | 1952-04-02 | 1960-06-30 | Power Jets Res & Dev Ltd | Attachment of tubular axial turbine or axial compressor rotor blades |
US4040769A (en) * | 1976-02-20 | 1977-08-09 | Britz Robert N | Fan wheel |
FR2416583A1 (en) * | 1978-02-04 | 1979-08-31 | Bosch Gmbh Robert | VENTILATION WHEEL FOR ELECTRIC MACHINE |
IT201800004983A1 (en) * | 2018-05-02 | 2019-11-02 | Impeller for jet fans, especially for tunnel fans, and method of producing impellers. |
-
1951
- 1951-10-16 DE DEK11640A patent/DE897749C/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1084273B (en) * | 1952-04-02 | 1960-06-30 | Power Jets Res & Dev Ltd | Attachment of tubular axial turbine or axial compressor rotor blades |
US4040769A (en) * | 1976-02-20 | 1977-08-09 | Britz Robert N | Fan wheel |
FR2416583A1 (en) * | 1978-02-04 | 1979-08-31 | Bosch Gmbh Robert | VENTILATION WHEEL FOR ELECTRIC MACHINE |
IT201800004983A1 (en) * | 2018-05-02 | 2019-11-02 | Impeller for jet fans, especially for tunnel fans, and method of producing impellers. |
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