Optimization Design And Dynamic Balancing Study Of The Beating-up Mechanism On The Water-jet Loom

In recent years domestic loom technology has made a leap of progress, at the same time the speed of the loom was increased continuously in order to fulfill the demand of production. How to analyze the dynamic characteristics of the loom at a high operating speed to provide reference for the dynamic balancing study has become an important aspect for improving the loom technology. As an important component of the loom, the overall performance of the loom was affected by the beating-up mechanism directly. In the beating process, huge shocking force and shocking moment are produced, resulting in vibration and noise, which has a great effect on the quality of fabric and the surrounding environment. Therefore, the study of dynamic balancing of beating-up mechanism has a very important significance.This paper is based on the RFJW10 intelligent water jet loom of Shandong Rifa Textile Group and uses Partial Redundant Servo Motor(PRSM) combined with the counter-weight method to do the dynamic balancing study of the loom. First, the relationships between the mechanisms of the loom from the view of process are introduced and the kinematics and dynamics model of rigid body is established to analyze the dynamic performance. In the fourth chapter, PRSM is used to do the dynamic balancing optimization of the beating-up mechanism through different servo motor rotation rule, the result shows that PRSM has certain optimization results according to the optimization model established in this paper, but still has a distance compared with the desiring results. After that the counter-weight method was used to do the improvement design on the rocker shaft in sley system which accounts the majority quality of the whole beating-up system, the feasibility of two different design ways are analyzed and the Pro / E and MATLAB are used to verify the feasibility of the design. Finally, PRSM is re-used to do the dynamic balancing study for the new beating-up system and the data analysis was combined in the fourth chapter to analyze the reasons why the results are not obvious by using the PRSM on the dynamic balancing of the beating-up mechanism and suggest improvement directions.The main contributions of this paper are analyzed the dynamic characteristics of the beating-up mechanism, and taking advantage of the counter-weight method does an improved design on the rocking shaft to make the sley system reach a static equilibrium state basically by adding a rectangular block. The result shows that the design way is effective on reducing shaking force and shaking moment in the process of beating, the peak of these two indexes is reduced by 21.78% and 15.76% separately. In addition, this paper also adopts PRSM to do the dynamic balancing analysis, although the optimization result is not so obvious, but the causes of this phenomenon are analyzed in order to offer reference by make the using of PRSM more effective on the shake balancing study of other linkage mechanism in the future.