Assembly mechanism comprising a tension anchor and...

F - Mech Eng,Light,Heat,Weapons – 01 – D

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F01D 5/06 (2006.01)

Patent

CA 2742868

The invention relates to a device (1) and to a method associated with an assembly mechanism for a rotor system of an axial turbo engine having a central tension anchor, as is particularly known from engine technology. To this end, the invention provides a tensioning tool that pre-tensions or biases the tension anchor prior to and during the insertion of the anchor into the compound rotor assembly. After inserting the biased tension anchor in the compound rotor assembly, the tension anchor is relaxed, whereby the anchor exercises a compressive force on the compound rotor assembly. According to a preferred embodiment, the compound rotor assembly is also biased (compressed) and relaxed after assembling the tension anchor, so that a desired nominal bias Sigma nominal can be particularly easily achieved. The use of a shaft locking nut is no longer necessary in the device according to the invention, thus avoiding the difficulties that are associated with the use of this nut, such as complexity and safety problems. The invention also relates to a method for assembling a tension anchor (2) for a rotor system (6) employing the assembly mechanism according to the invention.

L'invention concerne un dispositif (1) et un procédé pour un dispositif de montage destiné à un système de rotor d'une turbomachine axiale comportant un tirant central tel qu'employé notamment dans le domaine des réacteurs. L'invention concerne également un outil d'étirage destiné à précontraindre le tirant avant et pendant l'installation de celui-ci dans le rotor combiné. Après installation du tirant précontraint dans le rotor combiné, le tirant est relâché de telle manière qu'il exerce une pression sur le rotor combiné. Dans un mode de réalisation préféré, le rotor combiné est également précontraint (comprimé), puis relâché après montage du tirant de telle manière qu'il est possible d'obtenir simplement une précontrainte nominale souhaitée SigmaNenn. L'utilisation d'un écrou d'arbre devient inutile avec le dispositif selon l'invention et les problèmes inhérents à l'utilisation d'un tel écrou d'arbre, tels que complexité et problèmes de sécurité, sont éliminés. L'invention concerne également un procédé de montage d'un tirant (2) pour un système de rotor (6) au moyen du dispositif de montage selon l'invention.

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