Title:
ホバリング航空機
Document Type and Number:
Japanese Patent JP6655225
Kind Code:
B2
Abstract:
A hover-capable aircraft (1) having propulsion means (6); at least one rotor (3); transmission means (5) for transmitting power from the propulsion means (6) to the rotor (3) and lubricated with a lubricant; a heat exchanger (9), which receives the heated lubricant from the transmission means (5) and feeds the cooled lubricant back to the transmission means (5); and a fan (10) for producing airflow through the heat exchanger (9) to cool the lubricant, and which has an impeller (16) with blades (21), and an exhaust pipe (18) for expelling the hot air produced by cooling the lubricant; at least one portion (23) of the wall (22) of the exhaust pipe (18) has dissipating means (25) designed to selectively absorb pressure waves in a given frequency band related to the rotation speed (V) of the impeller (16) and to the number (N) of blades (21) of the impeller (16).
Inventors:
Andrea Gabrielli
Giuseppe Gasparini
Giuseppe Gasparini
Application Number:
JP2013219608A
Publication Date:
February 26, 2020
Filing Date:
October 22, 2013
Export Citation:
Assignee:
LEONARDO S.p.A.
International Classes:
B64C27/12
Domestic Patent References:
| JP63018559B2 | ||||
| JP2007321735A | ||||
| JP4297397A | ||||
| JP10049175A | ||||
| JP2006214428A | ||||
| JP2000110544A | ||||
| JP9004434A | ||||
| JP2008232053A | ||||
| JP2008240588A | ||||
| JP2005514550A |
Attorney, Agent or Firm:
Shinei Patent Office
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki