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Power vibration absorber for helicopter

A dynamic vibration absorber and helicopter technology, which is applied in the field of aviation machinery, can solve problems such as limiting the vibration reduction effect and affecting the weight center of gravity of the whole aircraft, and achieve the effects of improving comfort, reducing flight vibration levels, and increasing mass

Inactive Publication Date: 2012-07-18
哈尔滨哈飞航空工业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The design method of the dynamic vibration absorber is relatively mature, but it is generally obtained by adding a mass block. There is a contradiction in this design method. The mass of the mass block will affect the center of gravity of the whole machine. vibration effect

Method used

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  • Power vibration absorber for helicopter
  • Power vibration absorber for helicopter

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with specific embodiment:

[0014] During the test flight of a certain helicopter, the pilot reported that when the airspeed reached 150Km / h or more, the vibration was relatively large, and the feet and calves felt numb, uncomfortable and prone to fatigue. The measured vibration acceleration value of the driver's pedal reaches 0.27g.

[0015] This dynamic shock absorber is used on this machine. The battery is still the original battery of the machine. The support structure is installed according to the following steps: first, the octagonal aluminum plate 10 is placed between the first composite material plate 1 and the second composite material plate 3 . Place the second small aluminum plate 8 under the second composite material plate 3, and place the first aluminum strip 5, the second aluminum strip 6 and the first small aluminum plate 7 on the first composite material plate 1 and the second composi...

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Abstract

The invention discloses a power vibration absorber for a helicopter, which comprises a storage battery and a support structure. The storage battery is mounted on a floor of a front helicopter body of the helicopter by the support structure, and is used as a mass block to form a vibrating system by the aid of the support structure, and a power vibration absorption effect is realized. The storage battery is used as the mass block, accordingly, the weight of the total helicopter cannot be increased, and dual effects are realized due to the fact that the storage battery is heavy and a vibration absorption effect is good. In addition, flight vibration level on a floor of a control cabin is reduced by 30% at least after the power vibration absorber is mounted on the helicopter with violent vibration, and comfortableness of a pilot is remarkably improved during a flight.

Description

technical field [0001] The invention belongs to the field of aviation machinery, in particular to a vibration absorbing device for a helicopter. Background technique [0002] The vibration level of the airframe during helicopter flight has always been one of the most critical issues in the development of helicopters. Due to the many types of vibration sources of helicopters and the high strength of low-frequency vibration sources, it has caused considerable difficulty in the development and use of vibration reduction technology. Therefore, major helicopter companies in the world have been committed to the research of vibration reduction technology and spent a lot of manpower. financial resources. [0003] Helicopter vibration refers to the vibration of all parts of the helicopter such as the rotor system, transmission system, engine, control system, fuselage and landing gear. Its vibration can be divided into two parts: one is the vibration of the rotor system, transmissio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F15/02F16F15/28
Inventor 王金亮孙秀文张亚军王刚刘政张雷
Owner 哈尔滨哈飞航空工业有限责任公司
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