Novel high static and low dynamic rigidity piecewise linear vibration isolator and work method thereof

Abstract

The invention discloses a novel high static and low dynamic rigidity piecewise linear vibration isolator and a work method thereof. The novel high static and low dynamic rigidity piecewise linear vibration isolator comprises a spring formed by connecting an upper segment spring, a middle segment spring and a lower segment spring in series. When a vibration isolation object is installed above the novel high static and low dynamic rigidity piecewise linear vibration isolator, the upper segment spring generates a static compression amount, the middle segment spring is in a pre-compression state, and generates a pre-compression amount, the pre-compression amount is larger than the weight of the vibration isolation object, the lower segment spring is in a pre-stretching state, and generates a pre-stretching amount, and the pre-stretching amount is larger than the weight of the vibration isolation object. The novel high static and low dynamic rigidity piecewise linear vibration isolator can achieve demands for high static rigidity and low dynamic rigidity performance, and thereby achieves the purposes of not only guaranteeing static balance position stability, but also improving low frequency vibration isolation effects.

Description

technical field [0001] The invention belongs to the field of structural vibration and noise control, in particular to a novel segmented linear vibration isolator with high static and low dynamic stiffness and a working method thereof. Background technique [0002] Vibration isolation is a vibration reduction measure with a long history of development and extensive engineering applications, and the most widely used is the linear vibration isolator. In vibration isolation technology, reducing the stiffness of the vibration isolator is a general method to improve the vibration isolation effect, but the stiffness of the vibration isolator cannot be reduced without limit, because the vibration isolator that is too soft will have a large static deformation due to the gravity of the machine amount, deteriorating the system stability. An ideal vibration isolation device should have high static stiffness and low dynamic stiffness. High static stiffness is a necessary measure to ensu...

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Problems solved by technology

However, the disadvantage of this kind of vibration isolator is that the stability at the static equilibrium position is poor, and the change of the external load may cause the system to deviate greatly from the equilibrium position, so it is not suitable for occasions with strict requirements on stability, such as engine shaft alignment requirements system

[0004] At present, there are some common problems in the design of nonlinear vibration isolators: (1) The stability of the static equilibrium position is poor, and the change of the external load may cause the system to deviate greatly from the equilibrium position; (2) The vibration isolation effect at the low frequency stage is not good

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