Design And Simulation Analysis Of Solo-supported Gas System Of Piple-piece Air Jet Loom

In the modern weaving industry, advanced jet looms are widely used abroad for fabricproduction. Some of the economic strength of the business can afford, but most small businessesare unable to pay the costs of this magnitude. Therefore developing a cheap, energy-saving,simple, provincial air and efficient double-layer and double shed air-jet loom has a veryimportant theoretical and practical significance. Double shed and double-layer air-jet loom whichuses the upper and lower levels of velvet fabric, the formation of a rotating crankshaft loomingon the next two shed, and while two sets of jet spray devices at the same latitude, two layers offabric wovening simultaneously is a weaving loom.This thesis studies the design and implementation of weaving supply system of thedouble-layer and double shed jet loom, and simulation analysis for the effect of sub-nozzledistribution. First, according to the present situation and specific needs, the design framework ofthe supply system of air-jet looms is established on this thesis. A mathematical model describingthe flow of compressible gas flow is build by the classical theory of fluid mechanics and thediscrete equations and discrete equations method is also described. A gas source, dual-channelweft insertion system, main and auxiliary nozzles is included in the solo-supported gas system.Then, the characteristics of the supply air source, the main nozzle and the auxiliary nozzle withthe gas flow, the composition of the weft insertion pipe and the key parts of the design is made adetailed analysis. Furthermore, based on the important role of the crank slider structure in the gassupply system in the looms, its kinematic is analysised specifically. At the same time, accordingto the initial design defects, a new design scheme is put forward which is a good solution to theunstable nozzle pressure and imprecise weft insertione problem.Due to the complexity of thesimulation analysis of the entire supply system, the flow field within the weft insertion pipe isanalyzed, through the internal flow field analysis to determine the layout of the auxiliary nozzlespray angle and spacing.The main nozzle of the gas supply system pipes in the weft of the flowfield is analyzed, while a number of supplementary weft pipe nozzle in the flow field in thesynthesis of sub-nozzles at different angles and different auxiliary nozzle spacing in the conductof the theoretical modeling. The optimal choice for the system is established on this basis, that is,the number of auxiliary nozzle14, the spacing of100mm, and the spray angle of8°. At last, thisthesis summarizes the major findings and innovations, and look in the future needs for furtherwork.The study of this thesis indicates that the analysis shall provide a guide for the design and amelioration of double-layer and double shed jet loom.