Magneto-rheological pipeline dual-dynamic damping absorber

Abstract

The invention discloses a magneto-rheological pipeline dual-dynamic damping absorber. The mode of combining dynamic vibration absorption and damping dissipation energy vibration damping is adopted for controlling vibration of a pipeline. A magneto-rheological damper is adopted as a mass block and a leaf spring to form a first-order dynamic vibration damping structure, when the pipeline vibrates, the mass block and the leaf spring vibrate along with the pipeline and generate inertia reactive force, and vibration of the pipeline is lowered. A piston body, a spring, magneto-rheological fluid and a cylinder tube of the magneto-rheological damper form a second-order dynamic damping vibration damping structure. When the magneto-rheological damper vibrates along with the pipeline, the piston body compresses the piston to generate reactive force for the magneto-rheological damper under the inertia effect, and when the piston body and the cylinder tube move relatively, the piston body dissipates vibration energy under the damping force effect of the magneto-rheological fluid. The controller adjusts the damping force according to the vibration acceleration of the pipeline, and the energy dissipation efficiency of the damper is improved. One way, radial, axial and fixing frames can be flexibly assembled according to the pipeline vibration phenomenon, and vibration of the pipeline in any direction is controlled.

Description

technical field [0001] The invention relates to a pipeline damping device, in particular to a pipeline vibration absorber with adjustable frequency and damping, which is mainly used in pipeline systems for hydraulic transmission and fluid transportation, and belongs to the technical field of vibration control. Background technique [0002] The pipeline system is an important carrier of hydraulic transmission, fluid transportation and energy transmission, and is widely used in power machinery, ships and submarines, aerospace, petrochemical, thermal systems, sewage treatment, water supply and drainage and other fields. Piping system is one of the main ways for mechanical equipment and base structure to transmit vibration. In the pipeline system, power equipment such as compressors, pumps, and hydraulic motors will cause pressure and flow rate pulsations in the fluid medium in the pipeline during the working process. At the same time, when the fluid flows through the pipeline,...

AI Technical Summary

Problems solved by technology

In recent years, the TMD system has been popularized and applied in the field of vibration control of pipeline systems, but the vibration reduction frequency band of the TMD system is narrow. When the vibration frequency deviates from the TMD operating frequency, the vibration reduction effect is poor, and even the vibration will be amplified.

In order to improve the vibration reduction effect of the TMD system, multiple sets of TMDs with different natural frequencies are usually installed in the project, and this method increases the load of the pipeline, and also makes the structural vibration frequency more complicated, which increases the difficulty of TMD design

Images