Mode controlled attachment of rotor mounted components
US4275992A · kind A · utility
4Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1979 |
| Grant date | Jun 30, 1981 |
| Priority date | — |
| Expiry date | Apr 9, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S416/50
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An above-rotor mount (30) for a helicopter (10) comprises an upper plate (32) coupled to a lower plate (34) by means of links (42, 44, 46 and 48). The lower plate (34) is connected to a rotating rotor shaft (16) and a non-rotating stand pipe (40) extending inside the rotor shaft. The links (42, 44, 46 and 48) are focused to control the mode shapes and dynamic response of the mounted components at a preselected frequency, such as the predominant rotor harmonic. Springs (50, 52) are connected between the plates (32, 34) for damping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.