Design&Research Of High Temperature Integrative Furnace For Manufacturing Special Glass

Nowadays, it is a society with rapid development of science and technologyinformation. Particularly, with the increasing development of atomic energy,radio communications, computer, laser and infrared ray, the optical componentsmade by special glass have also obtained a rapid development. And it is widelyused in the domain of the top and precise science and technology，including thefield of aviation, aerospace, guidance, medicine, electronic information, hightemperature or high pressure vessel etc. In recent years, to manufacture highquality special glass and the device of special glass has been regarded as one ofthe hot research topics by the scientists around the world.High level research is based on advanced equipments, goes the logic, thehigh quality specialty glass products were closely related with the hightemperature furnace equipments. The ordinary high-temperature furnace canhardly meet the requirements, in doing so, it is necessary to design a hightemperature furnace to manufacture high quality special glass for meeting theneeds of scientific research. And this dissertation was engendered and developedbased on above background.A high temperature furnace device with integrating melting and annealingas one was designed through to special glass preparation technology researched.The furnace device is with a vertical structure, there is the melting furnace withmixing unit in the upper and the annealing furnace with a servo pouring devicein the lower part. In order to avoid the glass liquid from being polluted and toreduce the loss of the heat, the glass liquid was poured in a relatively closedenvironment, which greatly improved the scientific of experiment andproduction. The lifting and drop of stirring device was driven by adjustable lowspeed motor, with reasonable range of speed by the transmission mechanism ofworm gear and ball screw and suitable transmission ratio. The stirrer withindependent low speed motor could stably and safely run by the V pulley driving.Servo pouring system which was also one of the best innovations was a key part of the annealing furnace. The reasonable speed of lifting and drop and thestructure parameters of leak tubes were obtained through the analysis of pouringspeed of pouring model, which provided theoretical basis for reasonable designof servo pouring mechanism.In order to achieve remote monitoring, the PLC was connected withcomputer in the whole control system of liquation furnace. What includedtemperature controller, stirring motor, servo motor, molybdenum silicon rods,thermocouple and platinum electrode were controlled by PLC(S7-200-CPU-224).Coupling with temperature controller and computer, remotemonitoring and data records could be realized in the whole process.Considering that the special glass liquid was easy to jam or poor circulation,the pouring leakage was established by the finite element analysis softwareANSYS12.0. In order to successfully pour molten glass into the model, thetemperature field of steady state thermal process and transient thermal processwere analyzed, which provided theory basis and design parameters foroptimizing leak tube structure and thermal compensation.Finally, the special glass production process was fundamentally improved.In order to improve the quality of the special glass furthest, avoiding growing theglass defect such as the bubble, stones, striped and quarter etc, should be done inthe process of production. Some tentative researches were made formanufacturing special glass with big volume and zero defects.