Study On Dynamic Analysis And Balancing Of Four-bar Beating-up Mechanism Of Air-jet Loom

This dissertation focuses on the four-bar beating-up mechanism of an air-jet loom and systematically presents the study of the dynamic analysis and dynamic optimum balancing of the mechanism. It can be found that the results are more helpful to the dynamic design and dynamic modification of the mechanism of the loom. The general information is mainly as following:The first part deals with the exordium in which the research background and value of the dissertation are introduced and the research assignment is pointed out.The second part focuses on the rigid dynamic analysis of the beating-up mechanism. In this part, the four-bar beating-up mechanism is divided to three parts according to the movement features, and the dynamic model of the mechanism as rigid bodies is established. The basic data of the beating-up mechanism is obtained based on Pro/E platform. The dynamic characteristic is discussed in this part.The third part establishes the study on the optimum balancing of the beating-up mechanism. Two methods of adding balance weight and adding torsional spring are used to optimize the beating-up mechanism. The conclusion and internal factor are explored.The forth part investigates the elastodynamic analysis of the beating-up mechanism. The finite element technology and the theory so-called kineto-elastodynamic analysis are used to establish the dynamic model. The natural frequencies and the corresponding steady state response are obtained. The model is gradually affirmed via the theoretical analysis and the comparison with experiment result.The last part makes a brief conclusion of this dissertation. The characteristics of the study are summarized, and some ideas for further work are pointed out.