Novel variable-diameter variable-pitch propeller

A technology of variable pitch and propeller, which is applied to propellers, aircraft parts, transportation and packaging, etc. It can solve the problems of increasing the complexity of the propeller control system, and achieve the effects of weight reduction, improved aerodynamic performance, and simple and reliable mechanism

Inactive Publication Date: 2013-04-03
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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. These require a pitch adjustment device and a pitch locking device for closed-loop control. These adjustment mechanisms are usually structurally independent of the propeller drive, which increases the Complexity of Propeller Control Systems
Combined

Method used

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  • Novel variable-diameter variable-pitch propeller
  • Novel variable-diameter variable-pitch propeller
  • Novel variable-diameter variable-pitch propeller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The mechanism in this example realizes the telescopic movement of the blade through two-dimensional motion (rotation and compression), so that the diameter of the propeller disk can vary by nearly two diameters of the hub. The specific structure is as follows: what this embodiment shows is a novel propeller propulsion system with a variable diameter mechanism that is applicable to low-dynamic aircraft (such as high-altitude unmanned aerial vehicles, high-altitude airships, etc.) that is suitable for high and low-altitude flight environments. device. The variable diameter mechanism of the propeller is installed in the spinner dome and the propeller hub by rotating around the rotation axis of the drive mechanism (ie, the direction of the screw) and the variable vertical height link mechanism. For the mechanism composition, see Figure 1A , 1B As shown in Figures 2A and 2B, it mainly includes eight linkage mechanisms 1, drive mechanisms 2, blades 3, propeller hubs 4 and ca...

Embodiment 2

[0059] Of course, the structure of the present invention can only be realized by adopting the rotation method in Embodiment 1 when the diameter of the propeller does not require much change. At this time, the structure has little change compared with Example 1, and the difference is only reflected in the drive mechanism and the connecting rod mechanism. The specific structure is described as follows:

[0060] Drive mechanism 2 comprises motor 201, worm screw 202, worm screw fixed seat 203, worm wheel 204, worm wheel fixed shaft 205, differential gear 206, upper end bevel gear 208, rotating arm 209, rotating shaft and gear support seat 212; Motor 201 is fixedly installed on On the inner bottom surface of the propeller hub 4, the output shaft of the motor 201 is connected to the worm 202, and the two ends of the worm 202 are installed on the worm fixing seat 203, and the worm fixing seat 203 is installed on the inner bottom surface of the propeller hub 4; the worm wheel 204 is in...

Embodiment 3

[0064] Other possible institutional implementations:

[0065] In the above-mentioned two embodiments, the lock release mechanism adopts the armature and the spring to control the expansion and contraction of the pin, so as not to add an extra power source to the mechanism. Of course, if the structure permits, the motor can be used to control the cam to realize the expansion and contraction of the pin, or the motor can be used to control the rotation of the lead screw to realize the expansion and contraction of the pin through the nut matched with the lead screw.

[0066] The motor, worm gear and worm gear in the driving mechanism in the above two embodiments can adopt motor, bevel gear meshing and other modes, as long as the output of the motor can drive the rotation of the differential gear.

[0067] The pitch control mechanism in the above embodiment can also be implemented in the following way: the motor is installed at the end of the guide rod, and the independent rotation...

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PUM

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Abstract

The invention discloses a novel variable-diameter variable-pitch propeller. According to the novel variable-diameter variable-pitch propeller, a propeller cap (5) is arranged on a propeller hub (4) and provides a mounting space and a top support for a connecting rod mechanism (1), a driving mechanism (2), a sliding supporting mechanism (6) and a locking release mechanism; the driving mechanism (2) and the sliding supporting mechanism (6) are fixed on the propeller hub (4); the output of the driving mechanism (2) is connected with the connecting rod mechanism (1); a propeller blade (3) is fixed at the guide output end of the connecting rod mechanism (1) through a variable pitch mechanism (8); the bottom of the guide output end of the connecting rod mechanism (1) is connected with the sliding supporting mechanism (6); the connecting rod mechanism (1) is supported and guided through the sliding supporting mechanism (6); the driving mechanism (2) drives the connecting rod mechanism (1) to drive the propeller blade (3) to stretch out and draw back in the propeller diameter direction along with the sliding supporting mechanism (6), so that the diameter size of the whole propeller disc is changed; the connecting rod mechanism (1) is locked through the locking release mechanism (7) after the propeller blade (3) stretches out/draws back in place; and the variable pitch mechanism (8) drives the propeller blade (3) to rotate, so that variable pitch of the whole propeller is realized.

Description

technical field [0001] The invention relates to a novel high-performance propeller device with variable diameter and variable pitch independent mechanism, which 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 aeri...

Claims

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Application Information

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IPC IPC(8): B64C11/44B64C11/28
Inventor 马蓉范春石宋坚李勇李振新李博王文隽吴志红郑威
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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