Abstract:

Abstract In view of the questions of strong vibrations and noise caused by the four-bar linkage beating-up mechanism of the air-jet loom with the speed increasing, vibration characteristics are studied by means of the theoretical analysis, the numerical simulation and the experiment. Firstly, the dynamic characteristics of the four-bar linkage beating-up mechanism are analyzed. And the influence of the four-bar linkage beating-up mechanism on the vibration of the loom wallboard is analyzed based on the finite element method. Through analysis, the relationship of the crank angle of rotation and the forces of beating-up mechanism, the maximum vibration stress and acceleration of loom wallboard are established. Lastly, the location of the maximum vibration and the maximum stress are determined. The results show that the resonance frequency of the wall wallboard is about , which is very close to the main vibration frequency of the air jet loom. The maximum vibration of the loom wallboard is mainly concentrated near the beating-up mechanism. However, the maximum stress is mainly concentrated near the middle and lower part of the loom wallboard, not the largest vibration of the loom wallboard.