Propeller, power assembly and aircraft
A propeller and propeller hub technology, which is applied in the field of aircraft, can solve the problems of high overall noise, large noise, and poor user experience of aircraft, and achieve the effects of improving pulling force and efficiency, reducing noise, and reducing air resistance.
Inactive Publication Date: 2020-03-20
SZ DJI TECH CO LTD
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Problems solved by technology
When the propeller in the prior art is rotating, the turbulent flow of each part of the blade and the impact of the downwash airflow on the shell structure of the aircraft will generate relatively large noise
It is often superimposed with motor noise and structural vibration noise, and amplifies noise in certain frequency bands, resulting in a larger overall aircraft noise and poor user experience
Method used
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[0084] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0085] The terminology used in the present invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein and in the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as use...
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A propeller, a power assembly, and an aircraft. The angle of attack of each blade (20) is 17.57 + / - 2.5 degrees at the position that is away from the center of a hub (10) by 41.7% of the radius of a propeller (100); the angle of attack of the blade (20) is 16.65 + / - 2.5 degrees at the position that is away from the center of the hub (10) by 50% of the radius of the propeller (100); the angle of attack of the blade (20) is 15.62 + / - 2.5 degrees at the position that is away from the center of the hub (10) by 58.3% of the radius of the propeller (100); the angle of attack of the blade (20) is 14.48 + / - 2.5 degrees at the position that is away from the center of the hub (10) by 66.7% of the radius of the propeller (100); and the angle of attack of the blade (20) is 13.21 + / - 2.5 degrees at theposition that is away from the center of the hub (10) by 75% of the radius of the propeller (100). Use of the propeller with blades having an airfoil changing gradually enables each segment of the propeller along the expansion direction of the blades to be an optimal working segment, the air resistance is reduced, the tension and efficiency are improved, and the continuous flight distance of an aircraft is increased to improve the flight performance; at the same time, the noise generated when the blades work is also reduced so as to make the aircraft quieter during hovering.
Description
technical field [0001] The invention relates to the field of aircraft, in particular to a propeller, a power assembly and an aircraft. Background technique [0002] The propeller on the aircraft, as an important key component of the aircraft, is used to convert the rotation of the motor or engine shaft into thrust or lift. During the rotation of the propeller in the prior art, the turbulent flow of each part of the blade and the impact of the downwash airflow on the shell structure of the aircraft will generate relatively large noise. It is often superimposed with motor noise and structural vibration noise, and amplifies noise in certain frequency bands, resulting in a larger overall aircraft noise and poor user experience. Contents of the invention [0003] Embodiments of the present invention provide a propeller, a power assembly and an aircraft. [0004] The propeller according to the embodiment of the present invention includes a hub and a blade, and the blade is con...
Claims
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IPC IPC(8): B64C11/20B64C11/18
CPCB64C11/20B64C11/18B64C27/473B64C11/00B64C27/14B64C27/48
Inventor 林家靖陈鹏梁阔
Owner SZ DJI TECH CO LTD