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Embedded accurate balance weight system and method for helicopter

A technology for balancing counterweights and helicopters, applied in the field of helicopter rotors, can solve problems such as the destruction of dynamic balance state, intensified vibration of helicopters, and uncontrollable weight accuracy of counterweights, and achieves the effects of stable quality, avoiding disturbance, and being beneficial to flight quality.

Inactive Publication Date: 2021-02-26
CHINA HELICOPTER RES & DEV INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The balance weight system of the helicopter rotor is a device for adjusting the dynamic balance of the rotor. At present, the balance weight system is generally set on the propeller hub. The weight system is mainly composed of weight bolts, weight plates, weight nuts and other components Counterweight adjustment, when adjusting the dynamic balance of the rotor, the weight of the counterweight is adjusted by adding or subtracting the number of counterweight plates, and the counterweight plate is a gasket structure with a fixed specification prefabricated in advance, and each weight plate The weight of the counterweight is fixed and cannot be adjusted. The weight of each piece of the counterweight is about 10g, which makes the accuracy of the counterweight weight uncontrollable; and the current balance counterweight system is mostly exposed to the environment. The weight of environmental corrosion changes, and the adjusted dynamic balance state may be destroyed, which may easily cause the vibration of the helicopter to intensify

Method used

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  • Embedded accurate balance weight system and method for helicopter
  • Embedded accurate balance weight system and method for helicopter
  • Embedded accurate balance weight system and method for helicopter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, a helicopter built-in precision balance counterweight system includes blade bolts (1), inner bushing (2), compression screw plug (3), counterweight body (4),

[0038] The blade bolt (1) is installed on the base of the arm of the rotor hub to realize the connection between the hub and the blade; the center of the blade bolt (1) is provided with a cavity (11) communicating with the outside world;

[0039] The shape of the inner bushing (2) is adapted to the cavity (11), installed in the cavity (11), and fits with the cavity (11) in a clearance,

[0040] The counterweight (4) is filled in the inner bush (2);

[0041] The compression screw plug (3) is in sealing cooperation with the upper port of the blade bolt (1);

[0042] The inner wall of the inner bush (2) is provided with a groove near the port of the blade bolt (1) to form a bayonet, so as to facilitate the access of the inner bush (2);

[0043] The weight body (4) is made of tungsten-ba...

Embodiment 2

[0055]Such as Figure 4 As shown, the difference between embodiment 2 and embodiment 1 is that the weight body (4) is made of red liquid, and when filled with liquid, the weight can be accurate to within 0.1g.

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Abstract

The invention belongs to the technical field of helicopter rotors, and particularly relates to an embedded accurate balance weight system and method for a helicopter. The structure of the blade bolt is improved, the cavity is designed in the blade bolt, the balance weight system is arranged in the cavity, balance weight increasing and decreasing are conducted by filling balance weight particles, the built-in bolt neck bush in the balance weight system can effectively achieve built-in of the rotor wing balance weight system, and the balance weight body can achieve accurate control over the balance weight, meanwhile, due to the embedded design, the balance weight body can be prevented from being influenced by factors such as environmental corrosion, and the quality of the balance weight bodyis relatively stable, and disturbance to airflow of the helicopter rotors can be avoided, drag reduction of the helicopter rotors can be achieved, and improvement of flight quality is facilitated.

Description

technical field [0001] The invention belongs to the technical field of helicopter rotors, and in particular relates to a helicopter built-in precision balance counterweight system and a counterweight method. Background technique [0002] The balance weight system of the helicopter rotor is a device for adjusting the dynamic balance of the rotor. At present, the balance weight system is generally set on the propeller hub. The weight system is mainly composed of weight bolts, weight plates, weight nuts and other components Counterweight adjustment, when adjusting the dynamic balance of the rotor, the weight of the counterweight is adjusted by adding or subtracting the number of counterweight plates, and the counterweight plate is a gasket structure with a fixed specification prefabricated in advance, and each weight plate The weight of the counterweight is fixed and cannot be adjusted. The weight of each piece of the counterweight is about 10g, which makes the accuracy of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C17/02B64C27/32
CPCB64C17/02B64C27/32
Inventor 陈少峰覃海鹰雷少保邬文强
Owner CHINA HELICOPTER RES & DEV INST
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