Variable diameter screw propeller

Abstract

The invention relates to a variable diameter screw propeller, which comprises propeller blades (3) and propeller hubs (4), and further comprises a rod connection mechanism (1), a drive mechanism (2), a propeller cap (5), a slide support mechanism (6) and a locking releasing mechanism (7), wherein the propeller cap (5) is arranged on the propeller hub (4), and provides installation spaces and top supports for the rod connection mechanism (1), the drive mechanism (2), the slide support mechanism (6) and the locking releasing mechanism (7), the drive mechanism (2) and the slide support mechanism (6) are fixed on the propeller hub (4), an output shaft of the drive mechanism (2) is connected with the rod connection mechanism (1), the propeller blades (3) are fixed on a guide outlet end of the rod connection mechanism (1), the bottom of the guide outlet end of the rod connection mechanism (1) is connected with the slide support mechanism (6), the slide support mechanism (6) provides support and guide for the rod connection mechanism (1), the drive mechanism (2) drives the rod connection mechanism (1) to drive the propeller blades (3) along the slide support mechanism (6) to stretch along a diameter direction of the screw propeller so as to change a diameter of the whole screw propeller disc, and the rod connection mechanism (1) is locked through the locking releasing mechanism (7) after the propeller blades (3) stretch in place.

Description

technical field [0001] The invention relates to a novel high-performance propeller device with a variable-diameter mechanism that has strong adaptability and reliability to high and low-altitude flight environments and can be used in low dynamic aircraft propulsion systems. Background technique [0002] With the advancement of modern science and technology, the unique resource advantages of adjacent space have become the focus of attention of all countries. In recent years, driven by the needs of regional disaster prevention and reduction, environmental monitoring, and communication, military powers such as the United States and Europe have been working hard to develop adjacent space resources. Dynamic aircraft has become one of the most active aircraft researches today, which mainly includes high-altitude unmanned aerial vehicles and high-altitude airships. It can be seen from the design schemes of foreign advanced high-altitude unmanned aerial vehicles and high-altitude a...

AI Technical Summary

Problems solved by technology

Pitch adjustment is to adjust the pitch according to the height or thrust requirements, and then lock the pitch, which requires a closed-loop control of the pitch adjustment device and the pitch locking device. These adjustment mechanisms are usually structurally independent of the propeller drive device, which not only increases The complexity of the propeller control system and more importantly increases the overall weight of the propeller, which is very detrimental to the already demanding weight requirement

Combined with the small changes in stratospheric high-altitude weather and few working conditions, some high-altitude low-dynamic aircraft also consider adopting variable speed from the perspective of economy and control systems, but this method will put higher demands on the high-altitude and low-altitude working performance and heat dissipation of the motor. Require

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