Low-frequency vibration isolation metamaterial shaft structure

Abstract

The invention discloses a low-frequency vibration isolation metamaterial shaft structure. The low-frequency vibration isolation metamaterial shaft structure comprises unit cell units arranged in a series connection manner. Each unit cell unit comprises a shaft base body, an elastic ring arranged on the outer circumference of the shaft base body in a sleeving manner, and a mass ring arranged on the outer circumference of the elastic ring in a sleeving manner. Each elastic ring is evenly provided with buffering grooves in the axial direction of the elastic ring. The low-frequency vibration isolation metamaterial shaft structure is used for replacing a traditional mechanical device shaft system and has the outstanding beneficial effect that the low-frequency vibration isolation capacity is high, a forbidden band can be formed within 0-100 Hz, and spreading of torsional vibration is inhibited; and meanwhile, the low-frequency vibration isolation metamaterial shaft structure has small reduction on torsinal rigidity of the shaft system, the transmission efficiency of the shaft system is not affected, the structure is simple, and basis materials in use are all conventional materials, and batched machining and production are easy. The low-frequency vibration isolation metamaterial shaft structure can be used for lowering, isolation and control of low-frequency torsional vibration and low-frequency noise in automobiles, trains, vessels, airplanes and other devices.

Description

technical field [0001] The invention belongs to the cross-technical field of vibration and noise control and functional composite materials, and in particular relates to a low-frequency vibration-isolation metamaterial shaft structure. Background technique [0002] For a long time, low-frequency torsional vibration has always been a thorny problem in the use of transmission shafts. Due to its slow energy attenuation, long transmission distance, and strong penetration ability, it is difficult to control and block, which has a great impact on industrial production and the human body. great harm. In automobiles, the low-frequency torsional vibration of the transmission shaft will cause noise problems such as gear rattle and low-frequency booming noise in the car, which will reduce the comfort of the car, and will also cause transmission and final drive gears. In severe cases, the transmission shaft and the drive shaft may even be broken, endangering the lives of the occupants ...

AI Technical Summary

Problems solved by technology

[0002] For a long time, low-frequency torsional vibration has always been a thorny problem in the use of transmission shafts. Due to its slow energy attenuation, long transmission distance, and strong penetration ability, it is difficult to control and block, which has a great impact on industrial production and the human body. big hazard

In automobiles, the low-frequency torsional vibration of the transmission shaft will cause noise problems such as gear rattle and low-frequency booming noise in the car, which will reduce the comfort of the car, and will also cause transmission and final drive gears. In severe cases, the transmission shaft and drive shaft may even be broken, endangering the lives of occupants in the vehicle

In industrial production, low-frequency torsional vibration will reduce machining accuracy, production efficiency and service life of mechanical equipment, and in severe cases will cause major accidents such as mechanical equipment damage and production interruption

[0003] The traditional shaft system generally has high torsional stiffness, and its isolation ability for low-frequency torsional vibration is poor; and if a structure with low stiffness is used, the transmission efficiency and durability of the shaft system will be greatly reduced

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