Analysis of force acting on hydraulic blade regulating mechanism of axial-flow pump during adjusting process
Chen Hongxun1, Zhang Weiyong1, Pan Zhijun2, Lu Weigang3, Li Bin4
1.Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China; 2.Hangzhou Nanpai Construction Management Office, Hangzhou, Zhejiang 310000, China; 3.College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China; 4.School of Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
Abstract:In order to study the force acting on hydraulic blade regulating mechanism of an axial-flow pump during adjusting process, experiment and simulation had been done. On one hand, a measure experiment was taken with an axial-flow pump in Jiangdu pumping station. To calculate the force acting on the tie rod, it was necessary to measure the pressure of the upper and lower cylinder of servomotor piston during blades adjusting from-6 degree to+2 degree. The result shows that the regulating force gradually decreases with the increasing of the blade angle. On the other hand, a three dimensional simulation of turbulent flow in the axial-flow pump model was performed. Based on the simulation, hydraulic moment, centrifugal moment and friction moment acting on blades adjusting from-6 degree to+2 degree were calculated as 0.2 degree to be an increasing unit. We found that hydraulic moment and centrifugal moment will work together to make the blade to rotate in the closing direction. Then the regulating force was calculated on the basis of the three resistance moments. Comparing numerical solution with experimental values, it can be found that the two results has the same property that the regulating force decreases as blade angle increases, and both the force curves are approximately linear. This work provides a reference for the design of hydraulic blade regulating mechanism of axial-flow pumps.
陈红勋, 张维勇, 潘志军, 陆伟刚, 李彬. 轴流泵液压式叶片调节机构调节过程受力分析[J]. 排灌机械工程学报, 2013, 31(12): 1034-1038.
Chen Hongxun, Zhang Weiyong, Pan Zhijun, Lu Weigang, Li Bin. Analysis of force acting on hydraulic blade regulating mechanism of axial-flow pump during adjusting process. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(12): 1034-1038.
[1]钟绍湘,王少新,包洪洋.轴流泵可调叶片的水动力矩计算[J].水泵技术,1995(4):31-35. Zhong Shaoxiang,Wang Shaoxin,Bao Hongyang. Calculation of hydraulic moment acting on adjustable blades of an axial flow pump[J]. Pump Technology,1995(4):31-35.(in Chinese)[2]马晓忠,沙新建,刘刚.大型立式轴流泵叶片调节方式比较[J].排灌机械,2003,21(5):11-14. Ma Xiaozhong,Sha Xinjian,Liu Gang. Comparisons of adjusting mechanisms of blade angle in large vertical axial pumps[J]. Drainage and Irrigation Machinery,2003,21(5):11-14.(in Chinese)[3]吴生辉,倪福生.可调节叶片轴流泵水力矩数值计算[J].流体机械,2003,31(6):17-19. Wu Shenghui,Ni Fusheng. Numerical calculation of hydraulic moment on the adjustable blades of an axial pump[J]. Fluid Machinery,2003,31(6):17-19.(in Chinese)[4]邓东升,马志华,朱红耕.轴流泵叶片水力矩三维紊流数值计算[J].排灌机械,2006,24(5):8-11. Deng Dongsheng,Ma Zhihua,Zhu Honggeng. 3-D turbulent calculation of hydraulic moment of axial flow pump blades[J]. Drainage and Irrigation Machinery,2006,24(5):8-11.(in Chinese)[5]张思青,陈坚,王晓萍.轴流泵叶片水力矩实验测定及分析[J].水泵技术,2003(5):15-18. Zhang Siqing,Chen Jian,Wang Xiaoping. Measurement and analysis of hydraulic moment acting on axial flow pump blades[J]. Pump Technology,2003(5):15-18.(in Chinese)[6]张思青,张翔,沈东,等.可调式轴流泵叶片离心力矩计算[J].水泵技术,1997(2):23-24. Zhang Siqing,Zhang Xiang,Shen Dong,et al. Calculation of centrifugal moment acting on adjustable axial pump blades[J]. Pump Technology,1997(2):23-24.(in Chinese)[7]陈红勋,朱兵,魏培茹.轴流泵叶片调节力的分析与研究[J].水泵技术,2005(5):5-9. Chen Hongxun,Zhu Bing,Wei Peiru. Analysis and research of the regulating force on axial pump blades[J]. Pump Technology,2005(5):5-9.(in Chinese)[8]Wei Peiru,Chen Hongxun,Lu Wei. Characteristics of force acting on adjustable axial flow pump blade[J].Frontiers of Energy and Power Engineering,2008,2(4):508-513.[9]陈坚,叶渊杰,黄诚,等.轴流泵叶片转角与调节杆行程的关系[J].武汉大学学报:工学版,2010,43(2):170-174. Chen Jian,Ye Yuanjie,Huang Cheng,et al. Relationship between blade angles and regulation stroke for axial flow pumps[J]. Engineering Journal of Wuhan University,2010,43(2):170-174.(in Chinese)[10]高向平.往复式油缸摩擦力的确定方法[J].组合机床与自动化加工技术,1985(1):11-13. Gao Xiangping. Method of determining the friction of reciprocating cylinder[J]. Modular Machine Tool & Automatic Manufacturing Technique, 1985(1): 11-13.(in Chinese)