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Full-service-life propeller hub structure

A full-life, propeller-hub technology, applied in the field of helicopters, can solve problems such as time-consuming, labor-intensive and costly, bearing fatigue and looseness, and inability to share, and achieves the effects of simple connection structure, improved service life, and reduced maintenance and use costs

Pending Publication Date: 2018-05-04
重庆驼航科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

The bearings in the above two comparative patents all adopt similar figure 1 The parallel connection method makes the two bearings receive the same degree of centrifugal force at the same time, which cannot be shared, which will easily lead to fatigue and loosening of the bearings. During the use of the helicopter, it needs to be maintained and replaced midway, which is time-consuming, laborious and costly

Method used

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  • Full-service-life propeller hub structure
  • Full-service-life propeller hub structure
  • Full-service-life propeller hub structure

Examples

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Embodiment Construction

[0027] The preferred embodiments of the present invention are described below in conjunction with the drawings.

[0028] Such as Figure 2 to Figure 5 As shown, a full-life hub structure includes a hub center piece 3, a blade shaft 4, a paddle clamp 5, and a blade 6. The paddle shaft 4 is connected to the hub center piece 3 and the paddle clamp 5, and the blades 6 are arranged At the end of the blade clamp 5, the blade shaft 4 is provided with a first bearing 7, a second bearing 8 and a third bearing 9 in sequence along the direction of the end of the blade clamp 5. A step surface 41 and a second bearing 8 are provided on the blade shaft 4 The third bearing 9 and the third bearing 9 are respectively arranged on both sides of the step surface 41.

[0029] Specifically, the outer diameter of the second bearing 8 is smaller than the outer diameter of the third bearing 9, and the outer diameter of the third bearing 9 is larger than the outer diameter of the step surface 41. Specifical...

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Abstract

The invention provides a full-service-life propeller hub structure. The full-service-life propeller hub structure comprises a propeller hub center piece, a blade spindle, a propeller clamp and blades,wherein the blade spindle is connected with the propeller hub center piece and the propeller clamp, the blades are arranged on the tail end of the propeller clamp, a first bearing, a second bearing and a third bearing are successively arranged on the blade spindle along the tail end of the propeller clamp, the blade spindle is provided with a step surface, and the second bearing and the third bearing are respectively arranged on two sides of the step surface. Two mounting bearings of a helicopter rotary wing propeller hub are used for sharing a centrifugal force of the rotation of the propeller blades, so that the service life of the bearing is greatly prolonged, and the full-service-life use of an unmanned helicopter can be satisfied.

Description

Technical field [0001] The invention belongs to the technical field of helicopters, and specifically relates to a full-life hub structure. Background technique [0002] During the high-speed rotation of helicopter blades, very large centrifugal force is formed. The helicopter hub is mainly pulled by the centrifugal force of the blades. In order to maintain the stability of the connection of the aircraft blades, at least 2-3 bearings are usually installed in the helicopter hub to connect the propeller clamp shaft and the propeller clamp to support the propeller clamp and make the propeller rotate around the propeller clamp shaft during flight. The blade angle is used to adjust the lift of the aircraft. Traditional rotor hub bearings generally have only half or one-tenth of the life of a helicopter or even 200 hours of life, which seriously affects maintenance costs and maintenance consistency. In traditional design schemes, bearings are usually connected in parallel, such as fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C27/32B64C27/473B64C11/02
CPCB64C11/02B64C27/32B64C27/473
Inventor 刘一新
Owner 重庆驼航科技有限公司
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