Shock absorber capable with dynamically adjustable damping

Abstract

The invention relates to a shock absorber with dynamically adjustable damping. The shock absorber can be taken as an instrument shock absorber with dynamically adjustable damping, a power test platform base shock absorbing device and the like, belonging to the applicable technical field of mechanical vibration isolation, damping devices and the like. In the invention, the damping can be changed by the change of air pressure in an elastic corrugated pipe air bag of the shock absorber. The elongation and bending deformation of the elastic corrugated pipe air bag is the elastic bending deformation generated at the local part of the wave crest and the wave trough circle of the elastic corrugated pipe air bag instead of the elongation deformation of the whole rubber material, the elastic corrugated pipe air bag is very small in deformation resistance, sensitive to the air pressure change, rapid in dynamic reaction and high in dynamic control precision, and the driving force of the elastic corrugated pipe air bag does not need to overcome the rubber elastic force; the elastic corrugated pipe air bag only can expand axially but cannot expand in the radial direction, needs small air flow and has the characteristics of small duty ratio and power / mass ratio and low power consumption; and spiral springs with different rigidities and the elastic corrugated pipe air bag are combined for use, so that the shock absorber has better buffer function when being impacted.

Description

Technical field: [0001] The invention relates to a shock absorber with dynamically adjustable damping. The shock absorber can be used as an instrument shock absorber with dynamically adjustable damping, a shock absorber for a foundation of a dynamic test bench, etc., and belongs to a vibration isolation and damping device for mechanical vibration. and other fields of application technology. Background technique: [0002] Before the present invention was made, in the prior art, the shock absorber generally adopts a cylindrical structure, and the pressure of the upper and lower chambers is changed by the movement of the piston in the cylinder to form a pressure difference, so that the gas in the chamber flows through The damping force is generated when the valve plate or the orifice at the piston part. At present, there are mainly two types of hydraulic shock absorbers and pneumatic shock absorbers. The oil working inside the hydraulic shock absorber is easily affected by fac...

AI Technical Summary

Problems solved by technology

At present, there are mainly two types of hydraulic shock absorbers and pneumatic shock absorbers. The oil working inside the hydraulic shock absorber is easily affected by factors such as temperature, viscosity, and oxidation. High performance requirements, complex structure, high production cost

The above two types of shock absorbers cannot achieve dynamic vibration reduction, and the vibration reduction effect depends on factors such as its own structure and gas properties.

There are also airbag shock absorbers, because the rubber wall will expand in the axial and radial directions, but the radial expansion is a waste of energy; because the tension and deformation of the rubber material are strongly nonlinear, the deformation of the rubber wall cannot be calculated more accurately model, its dynamic response shows a large hysteresis, the dynamic control effect is not good, and it is not sensitive enough

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