A torsional quasi-zero stiffness vibration isolator with adjustable balance position and method

Abstract

The invention discloses a torsional quasi-zero-stiffness vibration isolator with an adjustable balance position and a method thereof, which comprises an outer casing in which a positive stiffness element, a negative stiffness element, a balance position adjustment mechanism and a clutch mechanism are arranged; the positive stiffness element includes a semicircle And the reed, the semicircle is provided with protrusions along the axial direction, and a gap is formed between the protrusions of the two semicircles for the reed to extend into; the negative stiffness element includes the outer magnetic ring and the inner magnetic ring, and the outer magnetic ring and the inner magnetic ring There is an air gap between them, and the inner magnetic ring is connected with the balance position adjustment mechanism, which can drive the inner magnetic ring to rotate to adjust the balance position of the inner and outer magnetic rings; the balance position adjustment mechanism is connected with the clutch mechanism, and the electromagnet in the clutch mechanism is connected with the The armature can be engaged or disengaged. When the armature is engaged, the positive and negative rigidities can be connected in parallel, and the balance position can be adjusted after disengagement. The invention can adapt to working loads of different sizes and forward and reverse rotation directions, and effectively improves the vibration isolation performance and application range of the vibration isolator.

Description

technical field [0001] The invention belongs to the technical field of torsional vibration isolation, and in particular relates to a torsional quasi-zero-stiffness vibration isolator with an adjustable balance position and a method thereof. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Rotating machinery is widely used in various industrial fields. As a common dynamic phenomenon in rotating mechanical systems, torsional vibration will interfere with mechanical equipment, especially the sensitive low-frequency vibration. The amplitude of low-frequency vibration during processing is generally large, which will not only affect the processing accuracy and work efficiency, but also increase the wear of precision parts inside the mechanical equipment and reduce its service life. At the same time, severe vibration will seriously endanger the health of ...

AI Technical Summary

Problems solved by technology

Some other scholars have proposed a quasi-zero stiffness coupling that isolates torsional vibration. This method also only has a vibration isolation effect on a fixed design load, and the coupling can only work under a fixed rotation. If a reverse load is input, The magnetic tiles of the inner and outer magnetic rings will deviate from the equilibrium position, causing the system to fail to achieve a quasi-zero stiffness state, seriously affecting the vibration isolation effect

Some scholars have proposed a torsional quasi-zero stiffness vibration isolator. Although this method improves the vibration isolation effect to a certain extent by adjusting the negative stiffness, it still only works on a fixed load in essence. Once the load changes greatly, It will greatly deviate from the quasi-zero stiffness state, which will affect the vibration isolation effect

[0006] All in all, the existing vibration isolators can only perform vibration isolation for fixed or small-variation loads, and cannot achieve a good vibration isolation effect when the load changes greatly

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