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Passive/active-selectable cantilever type dynamic vibration absorber

A dynamic vibration absorber and cantilever beam type technology, which is applied in the field of vibration absorbers, can solve the problems that the natural frequency cannot be adjusted from time to time, and the vibration absorption effect is poor, and achieves the effect of simple structure, good vibration absorption requirements and good stability.

Active Publication Date: 2014-03-12
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional dynamic vibration absorber is a passive vibration absorber with invariable parameters such as stiffness and mass. poor

Method used

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  • Passive/active-selectable cantilever type dynamic vibration absorber
  • Passive/active-selectable cantilever type dynamic vibration absorber
  • Passive/active-selectable cantilever type dynamic vibration absorber

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention will be described in more detail below in conjunction with the accompanying drawings:

[0017] combine Figures 1 to 4 , The structure of the present invention mainly includes the front bearing base 4, the rear bearing base 1, the stepping motor 2, the stepping motor base 14, the driving gear 3, the baffle 5, the mass block 6, the ball 7, the gear shaft 10, the vibration absorption device base 8 , control device 13 , sensor 12 . One end of the gear shaft 10 is designed with a lead screw, and the inner hole of the mass block 6 is tapped with a thread. Together they form a mechanical cantilever beam vibration absorber. The stepping motor 2, the driving gear 3, the control device 13, the sensor 12, etc. constitute the frequency adjustment part. The driving gear 3 and the gears on the gear shaft 10 form a gear pair, and the driving gear 3 is driven by the stepping motor 2 . When the gear shaft 10 rotates, the mass block 6 moves in the horizontal di...

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Abstract

The purpose of the invention is to provide a passive / active-selectable cantilever type dynamic vibration absorber, which comprises an overall base, a step motor, a gear shaft, baffles and a mass block, a driven gear is fixed on the gear shaft, a front bearing base, a rear bearing base and the step motor are fixed on the overall base, a front bearing and a rear bearing are respectively mounted on the front bearing base and the rear bearing base, the gear shaft passes through the front bearing base and the rear bearing base and is respectively fitted in the front bearing and the rear bearing, the driven gear is located between the front bearing base and the rear bearing base, the output end of the step motor is connected with a driving gear, the driving gear is engaged with the driven gear, the overall base is fixed between the two baffles, the gear shaft is provided with an external thread, the center of the mass block is provided with a hole, the wall of the hole is provided with an internal thread which is matched with the external thread of the gear shaft, and the mass block is mounted on the external thread of the gear shaft through the internal thread. The passive / active-selectable cantilever type dynamic vibration absorber is structurally simple and highly reliable and can better meet the requirement for vibration absorption under different conditions.

Description

technical field [0001] The present invention relates to a vibration absorber. Background technique [0002] Mechanical vibration will cause many adverse effects in engineering, such as causing noise pollution, affecting the work of other mechanical equipment, reducing the accuracy of instruments and machines, and even causing damage to equipment, buildings and other structures in severe cases. In the project, various means are used to reduce the harm of vibration, such as vibration absorption, vibration isolation, vibration damping, vibration elimination and structural modification. Among them, adding a dynamic vibration absorber to the controlled system is an effective means of suppressing vibration. Dynamic vibration absorber is a structure with certain rigidity and quality. When an excitation source with a specific frequency excites the overall system, if the natural frequency of the vibration absorber is the same as the excitation frequency, the vibration absorber will...

Claims

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Application Information

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IPC IPC(8): F16F15/28F16F7/10
Inventor 李玩幽刘子豪胡云波柴卓野王舒楠
Owner HARBIN ENG UNIV
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