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Redundant aircraft propulsion system using co-rotating propellers joined by end connectors

A propeller and connector technology, applied in the field of aircraft propulsion system, can solve problems such as damage to propeller structural integrity, propeller failure, propeller blade deflection, etc.

Active Publication Date: 2022-02-25
AMAZON TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When heavily loaded, the propeller blades may deflect, which may reduce the efficiency of the propeller somewhat, and may even cause the propeller to fail if the deflection compromises the structural integrity of the propeller

Method used

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  • Redundant aircraft propulsion system using co-rotating propellers joined by end connectors
  • Redundant aircraft propulsion system using co-rotating propellers joined by end connectors
  • Redundant aircraft propulsion system using co-rotating propellers joined by end connectors

Examples

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Embodiment Construction

[0024] The present disclosure relates to aircraft propulsion systems. In some embodiments, an aircraft propulsion system may have redundancy based on the use of multiple motors to drive (rotate) a single shaft coupled to a propeller. The motor can be selected such that the first motor can rotate the drive shaft in the event of failure of the second motor coupled to the drive shaft. A one-way clutch bearing or similar device may interface between the motor and the drive shaft, in the event the motor becomes inoperable, such as if the motor becomes stuck or locked due to failure caused by overheating or by other conditions or events In position, free rotation of the drive shaft is achieved. The use of a second motor fixes the position of the drive shaft which supports the propeller under radial eccentric loads.

[0025] In various embodiments, an aircraft propulsion system may have redundancy and / or achieve efficiency through the use of multiple propeller blades joined by head...

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PUM

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Abstract

A plurality of propeller blades (504, 506) may be joined by a head connector (508) to form a closed propeller apparatus. The end connectors may form a continuous structure between adjacent ends of the first propeller and the second propeller. The use of a tip connector reduces eddy currents generated near the tip of the propeller blade, which cause drag and slow down the rotation of the propeller blade. The tip connector may also reduce the noise caused by the rotation of the propeller blades. Additionally, the tip connector reduces or eliminates propeller blade deflection by creating a support structure to counteract forces that would otherwise cause deflection of the propeller blade, thereby improving propeller blade loading. In some embodiments, the tip connector may be formed from a malleable material and / or include one or more joints that enable at least one of the propellers to modify the pitch of the propeller blades.

Description

[0001] Cross References to Related Applications [0002] This patent claims priority to U.S. Utility Patent Application Serial No. 14 / 973,610, entitled "Redundant Aircraft Propulsion System Using Co-rotating Propellers Joined By Tip Connectors," filed December 17, 2015, which is incorporated by reference in its entirety Incorporated into this article. technical field [0003] The present invention generally relates to an aircraft propulsion system. Background technique [0004] Conventional rotorcraft sometimes use multiple propellers (ie, rotors), which are sometimes positioned symmetrically with respect to the aircraft's center of mass. Each propeller is coupled to a different drive shaft and is powered by a different individual motor through the use of an electronic speed controller (ESC) which controls the rotational speed of the motor and thus the propeller. Some rotorcraft have four, six, eight or more propellers. [0005] When many propellers are used for propulsio...

Claims

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Application Information

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IPC IPC(8): B64C11/18B64C27/473B64C11/48B64C27/10B64C39/02F03D1/06
CPCB64C11/18B64C27/473B64C11/48Y02E10/72Y02T50/60B64U20/20B64U50/34B64U10/17B64U50/19B64U30/24B64C27/463B64C27/14B64C11/306B64C39/024B64C27/10B64U10/10B64U10/13B64U30/20
Inventor N·H·罗伯茨D·T·希奥萨基R·D·韦尔什
Owner AMAZON TECH INC