Title:
GRADIENT PITCH MULTI-SECTION SLOTTED PROPELLER
Document Type and Number:
WIPO Patent Application WO/2019/200941
Kind Code:
A1
Abstract:
A gradient pitch multi-section slotted propeller, comprising a propeller hub (1) and at least two blades (2); the longitudinal axis of the propeller hub is a rotating axis; one end of each blade is a connecting end, and the connecting end is connected with an outer side face of the propeller hub; the at least two blades are distributed in central symmetry relative to the rotating axis; one or more strip-shaped slots (3) for the passage of airflow are formed on each blade in the diameter direction of the propeller; and the slots are disposed in a through manner from a windward side of the blades to a leeward side of the blades. According to the slotted propeller, since the slots are formed on the rotating blades and air firstly passes through the blades with a pitch angle at the front ends of the slots and is gathered in the slots to form an air flow with a certain downwash angle; then the air flow passes through the blades with a larger pitch angle at the rear ends of the slots to form a downwash air flow with a larger angle; and the larger the downwash air flow angle, the greater the lifting force of the propeller. Therefore, when an aircraft uses this propeller, the power consumption of the aircraft can be reduced, the cruising duration can be increased and the loading capability can be improved.
Inventors:
LI CHUN (CN)
Application Number:
PCT/CN2018/119506
Publication Date:
October 24, 2019
Filing Date:
December 06, 2018
Export Citation:
Assignee:
LI CHUN (CN)
International Classes:
B64C27/473; B64C11/20
Foreign References:
| CN1133252A | 1996-10-16 | |||
| CN108482666A | 2018-09-04 | |||
| CN208053630U | 2018-11-06 | |||
| CN105940189A | 2016-09-14 | |||
| CN107244400A | 2017-10-13 | |||
| CN104973236A | 2015-10-14 | |||
| US20120189457A1 | 2012-07-26 |
Attorney, Agent or Firm:
BEIJING CROWN & RIGHTS LAW FIRM (CN)
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