Turbomachine radial impeller vibration constraining and damping

Fluid reaction surfaces (i.e. – impellers) – Lashing between working members or external bracing – Peripheral

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416194, 416196R, F01D 524

Patent

active

059846380

ABSTRACT:
A compressor blade vibration reduction mechanism for a high-speed radial impeller for minimizing fatigue failures from various excitation sources. The vibration reduction mechanism includes a plurality of loose-fitting lashing pins coupling each impeller blade to an adjacent impeller blade. Each lashing pin extends through a first aperture in a blade located adjacent to the blade tip and through a second aperture of an adjacent blade. The second aperture of each blade is located a greater distance from the leading edge of the blade than the first aperture. The second aperture is located in an area of the blade having lower vibration during operation than the blade location where the first aperture is located.

REFERENCES:
patent: 822801 (1906-06-01), Wilkinson
patent: 937006 (1909-10-01), McKee
patent: 3131461 (1964-05-01), Miller
patent: 3527546 (1970-09-01), Zeman
patent: 3708244 (1973-01-01), Dawson et al.
patent: 4191508 (1980-03-01), Kuroda et al.
patent: 4407634 (1983-10-01), Tones
patent: 4904158 (1990-02-01), Kun

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