Propeller, power assembly and aircraft
A technology of propellers and blades, applied in the field of aircraft, can solve the problems of loud noise, poor user experience, and the overall noise of the aircraft
Pending Publication Date: 2020-03-20
SZ DJI TECH CO LTD
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- Abstract
- Description
- Claims
- Application Information
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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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[0095] 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.
[0096] 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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Disclosed are a propeller (100), a power assembly (200), and an aircraft (1000). The propeller (100) comprises a propeller hub (10) and a propeller blade (20), the propeller blade (20) being connectedto the propeller hub (10). The propeller blade (20) comprises a propeller root (21), a propeller tip (22) facing away from the propeller root (21), a pressure surface (23), and a suction surface (24)facing away from the pressure surface (23). The propeller tip (22) obliquely extends along the span direction of the propeller blade (20) toward the side where the pressure surface (23) is located. The distance between a horizontal plane where an airfoil rotation center of the propeller blade (20) is located, at a point where the distance from the center of the propeller hub (10) is 100% of the radius of the propeller (100), and a horizontal plane where an airfoil rotation center of the propeller blade (20) is located, at a point where the distance from the center of the propeller hub (10) is50% of the radius of the propeller (100), is 3.0% to 9.3% of the radius of the propeller (100), and a propeller blade (20) having a particular shape is therefore defined by the above-mentioned parameters. The propeller (100) using the propeller blade (20) can reduce the air resistance of the propeller (100), increase the pulling force and the efficiency, and increase the cruising range of the aircraft (1000) to improve the flight performance of the aircraft (1000), and can also reduce the noise generated by the propeller blade (20) during operation, so that the aircraft (1000) is quieter whenhovering, thereby improving the user experience.
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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Login to View More IPC IPC(8): B64C11/20B64C11/18B64C11/02B64C27/14
CPCB64C11/20B64C11/18B64C11/02B64C27/14
Inventor 林家靖陈鹏梁阔
Owner SZ DJI TECH CO LTD