Research And Development Of The Key Technology Of Energy-saving Double-layer Stenter Heat Setting Machine

Heat setting is a key process for finishing after printing and dyeing.Its function is to relax the unstable macromolecular structure in the fiber under the action of hot air at high temperature,transverse tension and longitudinal tension to form a relatively complete and relatively stable new molecular structure,and finally pass through cold air.The convection method quickly fixes the shape of the fiber and makes the fabric reach the predetermined weight,width,and color.The stenter heat setting machine is the main equipment in the heat setting process,and the performance of the heat setting machine has a direct impact on the fabric heat setting process and energy consumption.In view of the traditional single setting machine covers an area of space is the problem of high energy consumption of the big inconvenience,development energysaving double setting machine setting machine double oven structure will not only help heat energy recycling,can also reduce the space,convenient for operation Based on existing research,this paper has carried on the systematic research for the development of energy-saving double-deck setting machine,the main work is as follows:(1)Design a double-layer setting machine oven structure.According to the research of the existing single-layer sizing machine,the structure,transmission,process and other requirements of the double-layer sizing machine frame are analyzed,the main load-bearing structure is analyzed,and the design of the part drawing and engineering drawing is completed in combination with the UG three-dimensional software.Finally,according to the machine The frame structure completes the design of the oven seal.(2)Establish the vertical track of the double-layer setting machine according to the oven structure.The characteristics and adaptability of the vertical track are compared,the basic parameters of the sprocket are calculated and the finite element check is performed,and the force analysis of the vertical chain is performed.Aiming at the key design of the transmission parts of the amplitude modulation process,the standard parts such as screw rods are selected and checked,and the structure of fixed amplitude modulation and movable amplitude modulation is detailed later,and the entire process of adjusting the width of the double-layer track is completed.(3)Establish a double-layer setting machine exhaust gas treatment system.First,analyze the hazards and treatment technology of exhaust gas to explain the importance of the exhaust system.Then,through the construction of the external air duct,the exhaust mechanism of the double-layer setting machine is established,and the external air duct structure is optimized by finite element analysis.The heat in the exhaust gas is transported to the inlet and outlet of the setting machine through waste heat recovery,and finally the data of the area saved by the double-layer setting machine is calculated.(4)Numerical simulation of the dual-circulation air duct-nozzle system verifies that the air inlet height of the dual-circulation air duct has no obvious influence on the uniformity of wind speed.In view of the uneven wind speed in the upper air duct,the structure of the deflector is proposed,and the height of the deflector is Numerical simulations have verified that the wind speed of the upper nozzle is the most uniform at 10 mm.It is proposed to install two 45° baffles on the lower nozzle to achieve a certain optimization effect and improve the uniformity of wind speed.