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A propeller hub device with flapping restraint radial hinge shaft and helicopter with same

A hinge shaft and propeller hub technology, which is applied in the field of helicopters, can solve the problems of reliability, flight control and flexibility, strict requirements on the material of the rotor hub device, complex weight, etc., and achieve compact structure, good damping effect, and improved The effect of overall stiffness

Active Publication Date: 2021-10-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, a propeller hub device with flapping restrained radial hinge shaft and a helicopter with it are proposed. The radial arrangement of the flapping hinge shaft is adopted, and the viscoelastic flapping damping is simply arranged in the center body, and a whole The propeller hub suspends the blades on the rotor shaft, with few parts, high rigidity and high reliability, which solves the material requirements of the rotor hub device with metal bearing full hinge, heavy weight, and hingeless "rigid" rotor hub device Harsh, reliability and flexibility of flight control need to be tested

Method used

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  • A propeller hub device with flapping restraint radial hinge shaft and helicopter with same
  • A propeller hub device with flapping restraint radial hinge shaft and helicopter with same
  • A propeller hub device with flapping restraint radial hinge shaft and helicopter with same

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Embodiment 1

[0027] refer to figure 1 and figure 2 , figure 1 It shows a schematic structural view of a three-blade propeller hub device with swinging restraint radial hinge shaft according to Embodiment 1 of the present invention, figure 2 It shows a schematic structural view of a four-bladed propeller hub device with a swing-constrained radial hinge shaft according to Embodiment 1 of the present invention, as shown in figure 1 and figure 2 As shown, a propeller hub device with a swinging restraint radial hinge shaft includes: a central body 7;

[0028] A plurality of waving hinge shafts 4 are uniformly integrated in the radial direction on the central body 7, and a bearing 5 is assembled on each of the waving hinge shafts 4, and a propeller hub 3 is assembled on each of the bearings 5, and each of the A paddle 1 is installed at the lower end of the propeller hub 3;

[0029] Wherein, when the swing hinge shaft 4 rotates around the central body 7 , it drives the propeller hub 3 and...

Embodiment 2

[0039] A helicopter, including the propeller hub device provided in Embodiment 1 of the present invention with a swing-constrained radial hinge shaft.

[0040] According to the helicopter provided by the present invention, a plurality of swinging hinge shafts 4 are evenly integrated in the radial direction on the central body 7, and the propeller hub 3 is set on the swinging hinge shafts 4 to directly rotate to realize the swinging of the blade 1, directly The associated parts are only the central body 7 fixed on the rotor shaft 8, the swinging hinge shaft 4, the propeller hub 3 and the paddle 1 set on the propeller hub 3. Since there are fewer parts and the turning point is the smallest, the overall rigidity can be improved. Thereby improving the effect of the natural frequency of the blade 1; at the same time, the viscoelastic waving damper 6 is built into the center body 7, without a separate outer chain structure, the structure is compact, the damping effect is good, the numb...

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Abstract

The invention discloses a propeller hub device with a swinging restraint radial hinge shaft, which belongs to the technical field of helicopters. It includes: a central body, on which a plurality of swinging hinge shafts are uniformly integrated in the radial direction, each of the swinging hinge shafts is assembled with a bearing, each of the bearings is assembled with a propeller hub, each of the propellers A paddle is installed at the lower end of the hub; when the swinging hinge shaft rotates around the central body, it drives the paddle hub and the paddle at the lower end of the paddle hub to rotate around the central body. Using the propeller hub device provided by this application with the radial hinge shaft for flapping restraint, the flapping hinge shaft is radially arranged, and the paddle hub sleeve can be directly rotated on the flapping hinge shaft to realize the flapping of the blade. The structure is simple and there are fewer parts , the minimum turning point can achieve the effect of increasing the overall rigidity, thereby increasing the natural frequency of the blade.

Description

technical field [0001] The invention relates to the technical field of helicopters, in particular to a propeller hub device with swinging restraint radial hinge shafts and a helicopter with the same. Background technique [0002] The rotor hub device is the core technology of the helicopter and an important symbol to measure the technical level of the helicopter. The rotor propeller hub device has evolved from the era of full hinges where three hinges are separated from metal bearings, typically such as "Sea King" and "Chinook" with a maximum of more than 1,000 parts; it has developed to the current popular hingeless "rigid", such as: only variable pitch hinges "Lynx", "AH-64 Apache" with shimmy hinge, etc. [0003] Throughout the history of the development of the rotor hub device, the purpose of structural improvement is to reduce weight and minimize the number of parts. The advantages and disadvantages of various structures are present: the rotor hub device with metal bea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C27/39B64C27/48
CPCB64C27/39B64C27/48
Inventor 兰旭东周明李豪闫慧慧张煜洲李昊昱
Owner TSINGHUA UNIV