Hydraulic-elastic vibration isolator connected to main supporting reducing rod in series

Abstract

The invention provides a hydraulic-elastic vibration isolator connected to a main supporting reducing rod of a helicopter in series, and belongs to the technical field of helicopter vibration control.The main supporting reducing rod of a main reduction system of the helicopter is divided into two parts, and the two parts are connected through the hydraulic-elastic vibration isolator. The hydraulic-elastic vibration isolator comprises an upper liquid cavity shell, a lower liquid cavity shell, an outer cylinder, an inner cylinder, elastic rubber and filling liquid. Static loads can be effectively transferred, the operation stability of the helicopter is not changed, dynamic loads can be significantly isolated at the specific frequency of the helicopter, the vibration transferring rate is decreased, and meanwhile maintenance and replacement are very convenient.

Description

technical field [0001] The application belongs to the technical field of helicopter vibration control, and in particular relates to a liquid-elastic vibration isolator connected in series with a main reduction strut. Background technique [0002] Helicopter vibration problem is a very prominent problem in its development and application. Excessive vibration will not only lead to the decline of helicopter flight performance, shorten the life of structural components, reduce the accuracy of electronic equipment, increase maintenance costs and expenses, etc., but also cause human brain damage. The function of the central nervous system is reduced, and it is easy to cause physical discomfort such as dizziness and fatigue, which affects the normal work of the pilot. [0003] The vibration load of the rotor is transmitted to the fuselage through the main reduction system. Therefore, for helicopter vibration control, it is a very effective method to reduce the transmission of vibra...

AI Technical Summary

Problems solved by technology

The active and passive vibration isolation technologies that have been developed and applied mainly include nodal beam isolation, focused vibration isolation, and dynamic anti-resonance vibration isolation. The traditional active and passive vibration isolation systems are all mechanical, generated by lever swing arms. The magnification effect is limited by the strength and rigidity of the main reduction installation structure due to the need for movement space of the lever swing arm

On the other hand, the existing shock absorption or vibration isolation equipment is usually installed at the end of the final drive system, such as the end of the strut of the final drive, which takes up a lot of space

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