DE539229C - Metal propeller with light metal blades supported by steel rods over ribs - Google Patents
Metal propeller with light metal blades supported by steel rods over ribsInfo
- Publication number
- DE539229C DE539229C DENDAT539229D DE539229DD DE539229C DE 539229 C DE539229 C DE 539229C DE NDAT539229 D DENDAT539229 D DE NDAT539229D DE 539229D D DE539229D D DE 539229DD DE 539229 C DE539229 C DE 539229C
- Authority
- DE
- Germany
- Prior art keywords
- steel rods
- light metal
- metal
- propeller
- blades supported
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/16—Blades
- B64C11/20—Constructional features
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Springs (AREA)
Description
Bei Metallpropellern von der in der Zeichnung dargestellten Ausführungsart, bei denen, wie bekannt, aus Leichtmetall hergestellte Flügel von Stahlarmen gestützt werden, war es bisher sehr schwer, eine genügende Haltbarkeit herbeizuführen, weil Stahl und Leichtmetall verschiedene Dehnung besitzen. Wenn auch die gesamte Zentrifugalkraft durch in verschiedenen Abständen von der Nabe angeordnete Querrippen in Anteilen abgefangen wird, so entsteht doch im Betriebe Last und Dehnung genug auf den Stahlstangen, die das Leichtmetall nicht ohne weiteres mitmachen kann, so daß sich im Leichtmetall Risse bilden können.In the case of metal propellers of the type shown in the drawing, where, as is known, wings made of light metal are supported by steel arms It has so far been very difficult to achieve sufficient durability because steel and light metal have different elongation. Albeit all of the centrifugal force due to spaced at various distances from the hub Transverse ribs are intercepted in parts, so there is enough load and strain on the steel rods, which the light metal can not easily participate, so that in the light metal Can form cracks.
Zur Vermeidung dieses Mangels werden nach der Erfindung elastische Zwischenstücke zwischen den Vorspannmuttern des Stahlarmes und den Rippen des Leichtmetalls an-To avoid this deficiency, elastic spacers are used according to the invention between the preload nuts of the steel arm and the ribs of the light metal
ao geordnet. Diese elastischen Zwischenstücke haben die Spannkraft der jeweils auftretenden Zentrifugalkraft. Wenn nun bei hoher Beanspruchung die Stahlstangen sich dehnen, so treten die elastischen Zwischenstücke in Tätigkeit und verhindern ein Nachrücken des Leichtmetalls an die Vorspannmuttern der Stahlstangen. Auf diese Weise werden Rißbildungen im Leichtmetall vermieden, selbst wenn das Leichtmetall zwischen den Feldern Fehler aufweist.ao ordered. These elastic spacers have the resilience of each occurring Centrifugal force. If the steel rods stretch under high stress, so the elastic spacers come into action and prevent the Light metal to the pre-tensioning nuts of the steel rods. In this way, cracking will occur Avoided in the light metal, even if the light metal has defects between the fields.
In der beiliegenden Zeichnung ist ein Ausführungsbeispiel dargestellt. Es können anstatt runder Spiralfedern starke Federringe oder Gummiplatten oder elastische Zwischenstücke anderer Konstruktion ebenso Verwendung finden.An exemplary embodiment is shown in the accompanying drawing. It can instead round spiral springs, strong spring washers or rubber plates or elastic spacers other construction can also be used.
Abb. ι zeigt einen Leichtmetallflügel i, dessen Querrippen 5 durch Stahlstangen 2 mittels der Aufspannmuttern 3 unter Einschaltung elastischer Zwischenstücke 4 verspannt sind.Fig. Ι shows a light metal wing i, its transverse ribs 5 by steel rods 2 by means of the clamping nuts 3 with engagement elastic intermediate pieces 4 are clamped.
Abb. 2 stellt eine als Zwischenstück dienende elastische Feder dar.Fig. 2 shows an elastic spring serving as an intermediate piece.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE539229T |
Publications (1)
Publication Number | Publication Date |
---|---|
DE539229C true DE539229C (en) | 1931-11-26 |
Family
ID=6558483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT539229D Expired DE539229C (en) | Metal propeller with light metal blades supported by steel rods over ribs |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE539229C (en) |
-
0
- DE DENDAT539229D patent/DE539229C/en not_active Expired
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