Title:
HELICOPTER ROTOR MANIPULATION DEVICE BASED ON PITCH VARYING OF HYDRAULIC TORSION TUBE
Document Type and Number:
WIPO Patent Application WO/2023/142204
Kind Code:
A1
Abstract:
Provided in the present invention is a helicopter rotor manipulation device based on the pitch varying of a hydraulic torsion tube. The helicopter rotor manipulation device comprises a blade structure, a variable-pitch clamp system and a hydraulic system. The blade structure comprises blades, clamps and a rotor hub, which are connected in sequence by fasteners, wherein the rotor hub is connected to a rotor spindle. In the variable-pitch clamp system, a variable-pitch sleeve is located between a fixed rotor clamp and a rotating rotor clamp, an outer end face of the variable-pitch sleeve is fixedly connected to the rotating rotor clamp, and an inner end face of the variable-pitch sleeve is fixedly connected to the fixed rotor clamp. When the pressure inside the variable-pitch sleeve changes, a torsion angle generated at two ends of the variable-pitch sleeve drives the rotating rotor clamp to be angularly displaced, such that the angle of attack of the blades is controlled. The present invention uses a design having no auto-bank unit, such that the structure is simplified, and the reliability of a rotor system is improved. Meanwhile, the number of manipulation structures can also be reduced, thereby reducing the weight of the structure and maintenance costs, and further improving the reliability of a helicopter.
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| WO/2022/195191 | FAN MODULE PROVIDED WITH AN OIL TRANSFER DEVICE |
| WO/1997/025244 | HYDRAULICALLY REVERSIBLE ADJUSTABLE-PITCH PROPELLER UNIT |
Inventors:
GAO YADONG (CN)
HUANG DAWEI (CN)
HUANG DAWEI (CN)
Application Number:
PCT/CN2022/077064
Publication Date:
August 03, 2023
Filing Date:
February 21, 2022
Export Citation:
Assignee:
UNIV NANJING AERONAUTICS & ASTRONAUTICS (CN)
International Classes:
B64C11/38
Foreign References:
| CN205707301U | 2016-11-23 | |||
| CN104129499A | 2014-11-05 | |||
| CN113799971A | 2021-12-17 | |||
| KR20160038919A | 2016-04-08 | |||
| CN102797635A | 2012-11-28 | |||
| US20170218974A1 | 2017-08-03 |
Attorney, Agent or Firm:
JIANGSU SUNDY LAW FIRM (CN)
Download PDF:
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