Air splicing technology is the key technology to realize high speed, high quality and automatic winding in modern textile industry. However the current research of splicing mechanism is still in qualitative analysis, theoretical and experimental exploration stage. By modern computational mechanics method, with the air flow analysis results in different structures and shapes of splicer chamber, the air flow patterns under high pressure are determined; and the optimized structural characteristics of the splicing chamber are obtained in this paper. The results provide theoretical support on the innovative splicer chamber design, promote the development of the new air splicing technology, create important practical value, and provide the feasible means and methods in the air splicer theory research and optimization design.
The effects of the lubricant properties on the lubricating performance of the tripod sliding universal joint were studied under thermal condition by numerical method. The obtained results show that increasing lubricant viscosity increases the film thickness whereas increasing viscosity-pressure coefficient or viscosity-temperature coefficient is just the reverse. The pressure hardly depends on the viscosity-pressure coefficient or viscosity-temperature coefficient, and a larger lubricant viscosity induces only a remarkable second pressure peak. Increasing lubricant viscosity or viscosity-pressure coefficient increases the temperature whereas the increasing viscosity-temperature coefficient reduces it.
The pressure function method being different from traditional (experienced) design method. Natural balance outline design method is a tyre structure design method. Based on mathematics and mechanics reasonings, the structure and shape of the tyre were controlled by pressure function and then the structure design was further achieved. The mathematic-physical equations of the pressure function method were established. According to numerical calculation, the reasonable structure of tyre and the prediction of tyre-inflated shape could be accomplished. The pressure function method can reduce the cost and improve the design efficiency.
The spooling tension of the automatic winder is the critical factor influencing on the quality of the finished textile. The satisfying creel package depends on the constant spooling tension. However, the complex spooling tension is subjected to many factors, such as the unwinding tension, additional tension and yarn guide tension. In this paper, the composition of the spooling tension was studied theoretically and the main factors giving rise to the tension fluctuations were obtained. The gained results could be applied to controlling the tension fluctuations of the winder.
The prediction of tire inflated shape is significant to tire structure design. In this paper, the mathematic-physical equations were established by using pressure function method and then the prediction of tire inflated shape was numerically accomplished. The obtained results agree well with the actual tire shapes, verifying the pressure function method. The present work gives a prediction method in designing futuristic tire shapes and could be applied to the mechanics analysis of inflatable tire and optimization design of tyres.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.