A magneto-rheological pipeline vibration absorber

Abstract

The invention discloses a magneto-rheological pipeline absorber which comprises magneto-rheological fluid, an upper cover, a sealing gasket, a spring, a guiding ring, a piston, an excitation coil, a guiding rod, a cylinder tube, a radial fixing frame, an axial fixing frame, a controller and a fixing screw. The mode of combining dynamic vibration absorption and damping dissipation energy vibration damping is adopted for controlling vibration of a pipeline. A semi-active control strategy is adopted, the output damping force of a damper is dynamically adjusted according to the vibration features of the pipeline, the frequency response range of the absorber is enlarged, and the pipeline vibration attenuation process is accelerated. The radial and axial fixing frames of the absorber are designed, flexible assemble can be performed according to the pipeline vibration phenomenon, and vibration of the pipeline in any direction is controlled. As for an intensively-vibrated pipeline, the vibration damping effect can be improved in the mode of installing a plurality of sets of absorbers. When the system is powered off, the absorber has the certain damping effect, vibration damping failure or intensified pipeline vibration failure is avoided, and the magneto-rheological pipeline absorber has the high safety and reliability.

Description

technical field [0001] The invention relates to a pipeline vibration absorbing device, in particular to a pipeline vibration absorber with automatic damping adjustment, 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 p...

AI Technical Summary

Problems solved by technology

However, the common TMD system has a narrow effective frequency band. 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

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