Passive variable pitch propeller and propeller-driven unmanned aerial vehicle
A pitch-variable propeller and pitch-variable propeller technology, which is applied in the field of aerospace engineering, can solve problems such as difficult to guarantee the environmental adaptability of active pitch variable equipment, difficult to guarantee the reliability of active pitch variable equipment, and energy consumption of active pitch variable equipment. Achieve the effect of improving ring adaptability, light weight and simple structure
Inactive Publication Date: 2021-12-17
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology
High-altitude and long-endurance UAVs need different pitch angles at different flight altitudes. If a conventional electric pitch variable mechanism is used, the following problems exist: (1) It is difficult to guarantee the environmental adaptability of active pitch variable equipment
[0003] (2) It is difficult to guarantee the reliability of the ultra-long flight time of the active variable distance equipment
[0004] (3) Active pitch-variable equipment consumes a certain amount of energy
[0005] (4) The existing passive variable pitch mechanism is too complicated and not reliable
Method used
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[0030] The present invention will be described in more detail below. While the present invention has provided preferred embodiments, it should be understood that the invention can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation....
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The invention discloses a passive variable pitch propeller and a propeller-driven unmanned aerial vehicle. The passive variable pitch propeller comprises propeller blades and a variable pitch propeller root connected to the roots of the propeller blades, the variable pitch propeller root is in a barrel shape, the variable pitch propeller root is used for being arranged on the periphery of the propeller hub mandrel of the unmanned aerial vehicle in a sleeving mode, and the propeller hub mandrel is used for being connected with a power source; the variable pitch propeller root is provided with a torsional deformation structure, the torsional deformation structure is subjected to torsional deformation due to the change of centrifugal force generated by rotation of the propeller, and then the pitch angle of the propeller is changed. Through the torsional deformation structure of the variable pitch propeller root, the torsional deformation structure is subjected to torsional deformation due to the change of centrifugal force generated by rotation of the propeller so that the pitch angle of the propeller is changed, the annular self-adaptability can be improved, and the reliability during ultra-long endurance is guaranteed. The passive variable pitch propeller is simple in structure and low in energy consumption.
Description
technical field [0001] The invention belongs to the field of aerospace engineering, and in particular relates to a passive variable-pitch propeller and a UAV driven by the propeller. Background technique [0002] As a source of lift and power, the propeller has been widely used in drones, helicopters and other fields. High-altitude and long-endurance UAVs need different pitch angles at different flight altitudes. If a conventional electric pitch variable mechanism is used, there will be the following problems: (1) It is difficult to guarantee the environmental adaptability of active pitch variable equipment. [0003] (2) It is difficult to guarantee the reliability of the ultra-long flight time of the active variable distance equipment. [0004] (3) Active pitch-variable equipment consumes a certain amount of energy. [0005] (4) The existing passive variable pitch mechanism is too complicated and not reliable. [0006] Therefore expect a kind of propeller of the simple v...
Claims
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IPC IPC(8): B64C11/34
CPCB64C11/343B64U10/10
Inventor 陈志平李广佳李喜乐康传明佟阳
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS