Self-excited Vibration of Ink Rollers

Self-Excited Vibration in Hydraulic Ball Check Valve

This paper describes an experimental, theoretical model and numerical study of concentrated vortex flow past a sphere in a hydraulic check valve. The phenomenon of the rotation of the ball around the axis of the device through which liquid flows has been found. That is, due to the rotation of the sphere in the check valve vibration is caused. We observe the rotation of the sphere around the lon...

Blanket Cylinder Impression Cylinder Printing Plate Cylinder Moistening Roller Ink Rollers The Lithographic

A self-healing conductive ink.

The mechanical durability of conductive materials affects the performance and lifetimes of devices ranging from electrical circuits to battery electrode materials. Mismatches in thermal expansion coeffi cient, Young’s modulus, and Poisson’s ratio between the conductive materials and packaging materials in integrated circuits lead to delaminations and fractures both within conductive pathways an...

Application of least mean square algorithm to suppression of maglev track-induced self-excited vibration

Track induced self-excited vibration is commonly encountered in EMS (electromagnetic suspension) maglev systems, and a solution to this problem is important in enabling the commercial widespread implementation of maglev systems. Here, the coupled model of the steel track and the magnetic levitation system is developed, and its stability is investigated using the Nyquist criterion. The harmonic ...

Parametrically Excited Vibration in Rolling Element Bearings

A defect-free rolling element bearing has a varying stiffness. The variation of stiffness depends on number of rolling elements, their configuration and cage frequency. The time-varying characteristics of the stiffness results in a parametric excitation. This may lead to instability which is manifested as high vibration levels. An FEM simulation is performed to evaluate stiffness in each config...