空心涡轮叶片氧化铝基陶瓷铸型的凝胶注模成型行为  

Gelcasting Filling Behavior of Alumina Ceramic Mold of Hollow Turbine Blade

作　　者：荆慧[1] 李奕宁[1] 姜博[1] 鲁中良[1,2] 李涤尘[1] 董茵 

机构地区：[1]西安交通大学机械制造系统国家重点实验室,西安市710049 [2]先进航空发动机协同创新中心,北京100083 [3]西安中航动力精密铸造有限公司,西安市710021

出　　处：《硅酸盐通报》2014年第8期2073-2077,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家重大专项"燃气轮机定向凝固叶片氧化铝型壳型芯制备技术及关键设备"(2012ZX04007021)

摘　　要：在基于光固化成型技术的空心涡轮叶片一体化陶瓷铸型制造方法中,凝胶注模是关键环节,而陶瓷浆料的多相流特性对其充型性的影响一直是研究难题。论文以叶片的排气边结构作为充型模拟研究对象,采用Fluent软件模拟了浇注位置、浇注速度和陶瓷浆料粘度对充型质量的影响。结果表明:排气边结构受浇注位置、浇注速度和陶瓷浆料粘度的影响均较大。制备粘度较低的陶瓷浆料,在型壳部位进行浇注,使浇注位置远离排气边,并且以较低的浇注速度进行充型,可提高陶瓷铸型细小结构的充型质量。截取排气边结构进行了充型实验,从型壳处缓慢浇注,充型结果与模拟结论相符,浆料粘度对充型质量影响较大。Gelcasting is the key process in the manufacturing method of integral ceramic mold of hollow turbine blade based on stereo lithography technic, in which the multiphase flow characteristic of ceramic slurry has always been a research difficulty. This paper chose the intricate structure of turbine blade as the filling simulation object. Filling relation of the slurry with multiple factors （ casting position, casting speed and viscosity of ceramic slurry） has been simulated using the software Fluent. Results show that the casting position, casting speed and viscosity of ceramic slurry have an obvious influence on the filling of the intricate structure. With an acceptable flowability as precondition, the casting position should be chosen at the ceramic shell which is far from the intricate structure, a relatively low casting speed should be applied, to insure the slurry filling quality in the intricate structure of the turbine blade ceramic mold. A filling experiment has been done with the intricate structure, casting from the ceramic shell position with a low speed. Filling result corresponds to the simulation output, the slurry viscosity has a significant effect on the filling quality.

关 键 词：光固化成型 凝胶注模 Fluent模拟 两相流 陶瓷铸型 

分 类 号：TQ174[化学工程—陶瓷工业]