Arrangement for attaching blades on the wheel of a rotor
OwnerOttomar Gradlinventor
Life of this patent
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Abstract
To attach blades (5) on a rotor wheel for turbines or compressors, the wheel (1) has threads (2) running to the inside in a spiral shape on both sides of the outer edge. The blades (5) have segments on their feet (7) of counter-threads shaped accordingly. The threads are designed to have one turn, and their beginnings are staggered 180.degree. to one another on both sides of the wheel to offset inbalances. The threads on the wheel and on the blade feet there are self-locking and prestressed.
Claims26
An arrangement for attaching blades to a rotor wheel having opposite sides and an outer edge, comprising two threads, one thread on each opposite side of the wheel and running inward in a spiral shape from a beginning on an outer edge of said wheel, said beginning on one side of said wheel being circumferentially staggered in relation to the beginning of the other thread by 180.degree., in the circumferential direction, said threads having one turn, each blade including a foot having threaded segments, said threaded segments corresponding to and fitting together with said threads on said wheel.
Dependencies are inferred from the claim text.