冯占荣, 魏莙, 郭正华, 姚昆鹏. 高压硬密封固定球球阀密封性分析与优化[J]. 南昌航空大学学报(自然科学版), 2017, 31(1): 61-67,108. DOI: 10.3969/j.issn.1001-4926.2017.01.010
引用本文: 冯占荣, 魏莙, 郭正华, 姚昆鹏. 高压硬密封固定球球阀密封性分析与优化[J]. 南昌航空大学学报(自然科学版), 2017, 31(1): 61-67,108. DOI: 10.3969/j.issn.1001-4926.2017.01.010
FENG Zhan-rong, WEI Jun, GUO Zheng-hua, YAO Kun-peng. Sealing Performance Analysis and Optimization of High-pressure Hard Sealing Fixed Ball Valve[J]. Journal of nanchang hangkong university(Natural science edition), 2017, 31(1): 61-67,108. DOI: 10.3969/j.issn.1001-4926.2017.01.010
Citation: FENG Zhan-rong, WEI Jun, GUO Zheng-hua, YAO Kun-peng. Sealing Performance Analysis and Optimization of High-pressure Hard Sealing Fixed Ball Valve[J]. Journal of nanchang hangkong university(Natural science edition), 2017, 31(1): 61-67,108. DOI: 10.3969/j.issn.1001-4926.2017.01.010

高压硬密封固定球球阀密封性分析与优化

Sealing Performance Analysis and Optimization of High-pressure Hard Sealing Fixed Ball Valve

  • 摘要: 由于高压硬密封固定球球阀结构的复杂性导致在密封状态下的受力变得更加复杂,很难运用传统解析法很好地完成。为了确保其安全运行,本文针对Class1500 NPS14型涡轮蜗杆传动硬密封固定球球阀应用有限元法对其在关闭状态下的密封性及应力分布进行了分析。分析结果为:在介质载荷作用下,阀杆、压盖安装孔根部周围将出现严重的应力集中现象,宏观贯通泄漏流量为5 268.594 mL/min,密封比压严重不足。为了解决阀门的泄漏问题,通过DOE试验设计及响应面分析法对模型进行了优化设计,结果显示密封环面已不存在宏观贯穿开口,最小位置处的密封比压17.739 MPa也大于密封必需比压9.080 MPa,并且阀座应力集中也基本消除,优化效果明显。

     

    Abstract: Due to the complexity of the structure of the high-pressure hard sealing fixed ball valve, its stress situation in the sealed state becomes more complicated, which is difficult to use the traditional analytic method to analyze. In order to ensure its safe operation, in this paper the sealing performance and stress distribution of Class 1500 NPS14 turbo-worm drive hard sealing fixed ball valve are analyzed by finite element method in closed situation. The results indicate that, under the load of medium, a serious stress concentration would be produced on the stem and the root around of gland mounting hole and the macro through leakage flow will be 5 268.594 mL/min, which lead to seriously sealing pressure insufficient. In order to solve the question of valve leakage, the model was optimized by DOE experimental design and Response Surface Analysis. The results show that there is no macro through-hole in the sealing torus and the sealing pressure of the smallest position is 17.739 MPa, which is also greater than the required sealing pressure 9.080 MPa. The seat stress concentration is disappear and the optimization effect is obvious.

     

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