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A Helicopter Ring Vibration Isolation Device

A helicopter and vibration isolation technology, which is applied in the direction of shock absorbers, mechanical equipment, vibration suppression adjustment, etc., can solve the problems of high vibration isolation initial frequency of linear vibration isolators, insufficient vibration isolation bandwidth, and affecting service life, etc., to achieve Light weight, less space occupation, good vibration isolation effect

Active Publication Date: 2021-08-13
CHINA HELICOPTER RES & DEV INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The linear vibration isolator has the advantages of simple structure and convenient installation, but its disadvantages are also obvious: the main excitation frequency of the helicopter belongs to the medium and low frequency. In order to ensure the installation stiffness of the vibration-isolated equipment, the linear vibration isolator generally has no natural frequency If it is too low, the initial frequency of vibration isolation of the linear vibration isolator is high, and the vibration isolation bandwidth is not wide enough, especially for the vibration isolation effect of low and medium frequencies, and for some airborne equipment with large volume and mass, such as the observation Aiming, etc., because of its large size, large mass and high static stiffness requirements for connections, general linear vibration isolators cannot be used, resulting in the lack of corresponding vibration isolators for such airborne equipment. On existing models Generally, hard connection is used, which makes this kind of equipment in a relatively harsh vibration environment, which affects its service life

Method used

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  • A Helicopter Ring Vibration Isolation Device
  • A Helicopter Ring Vibration Isolation Device
  • A Helicopter Ring Vibration Isolation Device

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] Please also see figure 1 , figure 2 , image 3 and Figure 4 , the helicopter novel annular vibration isolation device of the present invention comprises an upper connecting plate 1, a lower connecting plate 2, a connecting support 3, a damping plate 4, an adjusting spring piece 5, a mass block 6, an upper connecting joint 7, a lower connecting joint 8, Ball bearing9. The upper connecting plate 1 is fixedly connected with the upper ...

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Abstract

The patent of the present invention relates to the field of helicopter vibration reduction / vibration isolation, and relates to a vibration isolation device structure for helicopter airborne equipment. The novel annular vibration isolation device for helicopter of the present invention comprises an upper connection plate, a lower connection plate, and several groups of vibration isolation mechanisms. The upper connecting plate and the lower connecting plate are hollow ring structures, and the several groups of vibration isolation mechanisms are arranged around the upper and lower connecting plates. The vibration isolation mechanism includes a connection support, a vibration damping plate, an adjustment spring piece, a quality block, and a connection joint. The damping plate is an arc-shaped structure whose shape matches the upper and lower connecting plates. The adjusting spring is set in the middle of the damping plate. The two ends of the sheet and the vibration damping plate are connected and fixed with the upper connecting plate through connecting joints. The invention realizes dual-frequency vibration reduction at different frequencies of vibration isolation and vibration absorption, has effective vibration isolation performance, and has high static connection stiffness at the same time, and can meet the requirements of large maneuvering flight of the helicopter.

Description

technical field [0001] The invention relates to the field of helicopter vibration reduction / vibration isolation, and relates to a vibration isolation device structure used for helicopter airborne equipment. Background technique [0002] Because of its unique structural form and flight mode, the helicopter has been in a complex aerodynamic environment, resulting in a high vibration environment for the helicopter body structure and on-board equipment. With the improvement of the performance of helicopters, the requirements for airborne equipment are getting higher and higher, and the impact of high vibration levels on the performance of airborne equipment is becoming more and more obvious. Therefore, the demand for vibration reduction / vibration isolation of airborne equipment is also becoming stronger and stronger. . [0003] According to the vibration theory, the vibration isolation effect can only be achieved when the natural frequency of the vibration-isolated object is lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F7/116F16F15/02F16F15/08
CPCF16F7/116F16F15/02F16F15/085F16F2228/06
Inventor 沈安澜陈静刘续兴伍特辉王宇奇
Owner CHINA HELICOPTER RES & DEV INST
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