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公开(公告)号：US3771922A
公开(公告)日：1973-11-13
申请号：US3771922D
申请日：1972-10-30
Applicant: MC DONNELL DOUGLAS CORP
Inventor： TRACY A
IPC: F01D5/22
CPC classification number: F01D5/22
Abstract: Projections near the tips of high speed rotary blades are actuated by centrifugal force to ensure uniform spacing between the blade tips as a means of reducing buzz-saw noise.
Abstract translation: 通过离心力驱动高速旋转叶片尖端附近的突出物，以确保叶片尖端之间的均匀间隔，以减少嗡嗡声噪声。
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