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- 2016
空心涡轮叶片陶瓷铸型微细结构 负压吸注充型工艺研究
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Abstract:
为了提高在基于光固化成型技术的空心涡轮叶片型芯、型壳一体化陶瓷铸型制造方法中陶瓷浆料对微细复杂结构的充型能力和铸型结构的完整性,提出了负压吸注凝胶注模工艺方法。以某型号空心涡轮叶片的冷却通道微孔为研究对象,利用细长管道充型原理,分析了凝胶注模工艺制造陶瓷铸型的充型行为。采用仿真分析的方法,在不同进出口压力差下,对冷却通道微孔简化模型负压吸注的充型情况进行模拟仿真,得到合理的负压吸注进出口压力差参考值,通过负压吸注实验和工业微米X射线成相系统检测对仿真结果进行验证。最后,分析了负压吸注工艺对陶瓷铸型性能的影响。研究结果表明:当氧化铝基陶瓷浆料固相体积分数为60％、负压吸注的进出口压力差为0.03 MPa时,可实现空心涡轮叶片冷却流道微孔结构的凝胶注模完整无缺陷充型,并且可以提高陶瓷铸型坯体的致密度和强度。
To improve the filling capacity of slurry and integrity of ceramic mold in process of fabricating the integral ceramic mold based on stereolithography, a negative pressure injection method is proposed, which focuses on small cooling holes of hollow turbine blade. The gel？？casting filling process is investigated following the filling principle for a long and thin tube. A numerical simulation is carried out to reveal the effect of negative pressure injection on the mold filling capacity of slurry in small and complex structures, and the suitable pressure difference between the import and export is obtained. The negative pressure injection experiment and industrial CT detection are performed to verify the simulation results. The effect of negative pressure injection on the performance of ceramic mold is analyzed. It is found that the small cooling holes of hollow turbine blade can be duplicated without defects when the solid loading of alumina ceramic slurry possesses 60％ and the pressure difference between the import and export reaches 0.03 MPa, and the density and strength of the green ceramic mold can be improved
| [1] | ［9］OMATETE O O, JANNEY M A, STREHLOW R A. Gelcasting: a new ceramic forming process ［J］. American Ceramic Society Bulletin, 1991, 70(10): 1641？？1649. |
| [2] | ［11］李祥, 王成焘. 基于增材制造和凝胶注模成型技术的多孔生物陶瓷支架制备与表征 ［J］. 中国骨科临床与基础研究杂志, 2013, 5(1): 35？？39. |
| [3] | LI Xiang, WANG Chengtao. Preparation and characterization of porous bioceramic scaffold based on additive manufacturing and gel？？casting technology ［J］. Chinese Orthopaedic Journal of Clinical and Basic Research, 2013, 5(1): 35？？39. |
| [4] | ［12］ZHUANG Mengmeng, WANG Mingchao, ZHAO Yingna, et al. Fabrication and high？？temperature properties of Y？？TZP ceramic helical springs by a gel？？casting |
| [5] | process ［J］. Ceramics International, 2015, 41(4): 5421？？5428. |
| [6] | ［13］OLHERO S M, FERREIRA J M F. Influence of particle size distribution on rheology and particle packing of silica？？based suspensions ［J］. Powder Technology, 2004, 139(1): 69？？75. |
| [7] | CHEN Rongzhang. Review and prospect of developments of cast superalloys and technology of aeroengine turbine blade ［J］. Aeronautical Manufacturing Technology, 2002(2): 19？？23. |
| [8] | LU Zhongliang, JIANG Bo, ZHOU Jiangping, et al. Defects control of manufacturing ceramic mold of hollow turbine blade based on stereo lithography ［J］. Journal of Mechanical Engineering, 2014, 50(21): 111？？117. |
| [9] | ［1］陈荣章. 航空铸造涡轮叶片合金和工艺发展的回顾与展望 ［J］. 航空制造技术, 2002(2): 19？？23. |
| [10] | ［8］刘涛, 鲁中良, 苗恺, 等. 面向空心涡轮叶片的氧化铝基陶瓷铸型高温强化制造 ［J］. 航空学报, 2014, 35(7): 2072？？2080. |
| [11] | LIU Tao, LU Zhongliang, MIAO Kai, et al. High？？temperature strengthening manufacturing of alumina？？based ceramic molds used for hollow turbine blades ［J］. Acta Aeronautica et Astronautica Sinica, 2014, 35(7): 2072？？2080. |
| [12] | ［10］李县辉, 燕青芝, 韩永军, 等. 结构陶瓷凝胶注模技术研究进展 ［J］. 陶瓷学报, 2014, 35(3): 243？？248. |
| [13] | LI Xianhui, YAN Qingzhi, HAN Yongjun, et al. Research and development of gelcasting for structural ceramics ［J］. Journal of Ceramics, 2014, 35(3): 243？？248. |
| [14] | ［2］康海峰, 李飞, 赵彦杰, 等. 高温合金空心叶片精密铸造用陶瓷型芯与型壳的研究现状 ［J］. 材料工程, 2013(8): 85？？91. |
| [15] | KANG Haifeng, LI Fei, ZHAO Yanjie, et al. Research status on ceramic cores and shells for superalloy hollow blades investment casting ［J］. Journal of Materials Engineering, 2013(8): 85？？91. |
| [16] | ［3］GOLDSTEIN R J, JIN P. Film cooling downstream of a row of discrete holes with compound angle ［J］. Journal of Turbomachinery, 2001, 123(2): 222？？230. |
| [17] | ［4］MAITEH B Y, JUBRAN B A. Effects of pressure gradient on film cooling effectiveness from two rows of simple and compound angle holes in combination ［J］. Energy Conversion and Management, 2004, 45(9): 1457？？1469. |
| [18] | ［5］李涤尘, 吴海华, 卢秉恒. 型芯型壳一体化空心涡轮叶片制造方法 ［J］. 航空制造技术, 2009(3): 36？？42. |
| [19] | LI Dichen, WU Haihua, LU Bingheng. Shaping method of hollow turbine blades with integral shelled core ceramic mold ［J］. Aeronautical Manufacturing Technology, 2009(3): 36？？42. |
| [20] | ［6］WU H, LI Dianrong, TANG Y, et al. Rapid casting of hollow turbine blades using integral ceramic moulds ［J］. Proceedings of the Institution of Mechanical Engineers: Part BJournal of Engineering Manufacture, 2009, 223(6): 695？？702. |
| [21] | ［7］WU Haihua, LI Dichen, CHEN Xiaojie, et al. Rapid casting of turbine blades with abnormal film cooling holes using integral ceramic casting molds ［J］. The International Journal of Advanced Manufacturing Technology, 2010, 50(1/2/3/4): 13？？19. |
| [22] | ［14］PRABHAKARAN K, PAVITHRAN C. Gelcasting of alumina using urea？？formaldehyde: IPreparation of concentrated aqueous slurries by particle treatment with hydrolysed aluminium ［J］. Ceramics International, 2000, 26(1): 63？？66. |
| [23] | ［15］李奕宁, 鲁中良, 李振发, 等. 空心涡轮叶片凝胶注模陶瓷浆料的设计与制备 ［J］. 材料科学与工艺, 2013, 21(6): 54？？59. |
| [24] | LI Yining, LU Zhongliang, LI Zhenfa, et al. Design and preparation of gel？？casting ceramic slurry for gas turbine blades ［J］. Materials Science and Technology, 2013, 21(6): 54？？59. |
| [25] | ［16］姜博, 鲁中良, 苗恺, 等. 凝胶注模制备空心涡轮叶片陶瓷铸型的颗粒偏析控制 ［J］. 西安交通大学学报, 2014, 48(10): 77？？83. |
| [26] | JIANG Bo, LU Zhongliang, MIAO Kai, et al. Particle segregation control in fabricating ceramic mold for hollow turbine blades during gel？？casting ［J］. Journal of Xi’an Jiaotong University, 2014, 48(10): 77？？83. |
| [27] | ［17］鲁中良, 姜博, 周江平, 等. 基于光固化成型技术的空心叶片陶瓷铸型制造缺陷控制 ［J］. 机械工程学报, 2014, 50(21): 111？？117. |
