Liquid Leakage and Mixing Characteristics at Distribution Windows of Dual-medium and Dual-displacement Axial Piston Pumps

doi:10.3901/JME.2020.22.271

Abstract

Abstract: In order to further improve the integration of the reverse osmosis desalination system and the working efficiency of its power components, while reducing the energy consumption of the system, the leakage and mixing characteristics of two different concentrations of seawater at the distribution windows of double-medium and double-displacement axial piston pump in variable reverse osmosis seawater desalination motor pump are deduced theoretically. At the same time, through the method of finite element simulation, the leakage and mixing characteristics of two different concentrations of seawater at two pairs of distribution windows under different structural parameters and operating parameters are studied and analyzed. The correctness of the analysis model and the results obtained is verified by comparing with the theoretical analysis result. The analysis results show that the leakage and mixing characteristics of seawater with different concentrations at the distribution windows on both sides of piston pump are slightly weakened with the increase of the cylinder rotation speed and obviously increase with the increase of the liquid film thickness. At the same time, it is shown that the leakage and mixing characteristics of seawater with different concentrations at the outer distribution windows of the piston pump are hardly affected by the pressure change on the thick brine side. However, the leakage and mixing characteristics of the seawater with different concentrations at the inner distribution windows weakened significantly as the pressure on the thick brine side increases. The research results can provide a reference for the design of seawater desalination double-medium and double-displacement axial piston pump and the study of leakage and mixing characteristics of seawater with different concentrations at the distribution windows.

Key words: double-medium and double-displacement axial piston pump, leakage characteristics, mixing characteristics, structural parameters, operating parameters

CLC Number:

TH137
P747

SUN Yanan, GAO Dianrong. Liquid Leakage and Mixing Characteristics at Distribution Windows of Dual-medium and Dual-displacement Axial Piston Pumps[J]. Journal of Mechanical Engineering, 2020, 56(22): 271-280.

References

[1] LEE K P,ARNOT T C,MATTIA D. A review of reverse osmosis membrane materials for desalination development to date and future potential[J]. Journal of Membrane Science,2011,370(1-2):1-22.
[2] 刘秀龙,曹泷,徐进良,等. ORC驱动RO海水淡化不同能量回收方式性能分析[J]. 动力工程学报,2018,38(4):329-336. LIU Xiulong,CAO Shuang,XU Jinliang,et al. Performance analysis of an ORC-RO desalination system with different energy recovery methods[J]. Journal of Chinese Society of Power Engineering,2018,38(4):329-336.
[3] SONG D W,WANG Y,XU S C,et al. Analysis,experiment and application of a power-saving actuator applied in the piston type energy recovery device[J]. Des-alination,2015,361(1):65-71.
[4] Al-HAWAJ O M. The design aspects of rotary work exchanger for SWRO[J]. Desalination and Water Treat-ment,2009,8(1-3):131-138.
[5] 苗超,谢春刚,冯厚军,等. 船用海水淡化技术发展现状与研究建议[J]. 船舶工程,2011,33(6):6-9,40. MIAO Chao,XIE Chungang,FENG Houjun,et al. Development status and research proposals on seawater desalination technology for ship[J]. Ship Engineering,2011,33(6):6-9,40.
[6] JOHN P M. Combined axial piston liquid pump and energy recovery pressure exchanger[P]. US Patent 00006006,2011.
[7] 宋涛. 能量回收型轴向活塞泵的研究[D]. 秦皇岛:燕山大学,2017. SONG Tao. Research on energy recycle of axial piston pump[D]. Qinhuangdao:Yanshan University,2017.
[8] 肖述晗. 反渗透海水淡化一体式能量回收装置(PPX)的机理研究[D]. 北京:北京工业大学,2017. XIAO Shuhan. Mechanism research of reverse osmsis seawater desalination integrated energy recovery device[D]. Beijing:Beijing University of Technology,2017.
[9] JEREMY M,RICHARD L S. Rotary pressure transfer devices:US 2009/0180903[P]. 2009-07-16.
[10] SHUMWAY S. Pressure exchange apparatus:US 6537035B2[P]. 2003-03-25.
[11] KASSEM S A,BAHR M K. Effect of port plate silencing grooves on performance of swash plate axial piston pumps[C]//Proceedings of the Seventh Cairo University International MDP Conference Cairo-Egypt,2000:139-148.
[12] MA J,FANG Y,XU B,et al. Optimization of cross angle based on the pumping dynamics model[J]. Journal of Zhejiang University-Science A,2010,11(3):181-190.
[13] 张晓刚,闫政,权龙,等. 双排油轴向柱塞泵配流特性理论分析与试验[J]. 农业机械学报,2017,48(6):373-380,412. ZHANG Xiaogang,YAN Zheng,QUAN Long,et al. Theoretical analysis and experiment on flow allocation characteristics of dual discharging axial piston pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2017,48(6):373-380,412.
[14] 杨阳,权龙,黄家海. 变转速变排量双控轴向柱塞泵脉动特性及噪声研究[J]. 机械工程学报,2016,52(16):176-184. YANG Yang,QUAN Long,HUANG Jiahai. Characteristics of pulsation and noise in the axial piston pump with displacement and speed compound control[J]. Journal of Mechanical Engineering,2016,52(16):176-184.
[15] 杨阳,权龙,杨敬. 轴向柱塞泵非止点配流窗口过渡区压力脉动特性分析[J]. 机械工程学报,2011,47(24):128-134. YANG Yang,QUAN Long,YANG Jing. Pressure pulsation characteristic analysis of the non-dead spots transition zone between flow distribution windows of axial piston pump[J]. Journal of Mechanical Engine-ering,2011,47(24):128-134.
[16] 张德胜,耿琳琳,施卫东,等. 轴流泵水力模型压力脉动和振动特性试验[J]. 农业机械学报,2015,46(6):66-72. ZHANG Desheng,GENG Linlin,SHI Weidong,et al. Experimental investigation on pressure fluctuation and vibration in axial-flow pump model[J]. Transactions of the Chinese Society for Agricultural Machinery,2015,46(6):66-72.
[17] PAOLO C,ANDREA V,GERMANO F,et al. Modeling of fluid properties in hydraulic positive displac-ement machine[J]. Simulation Modeling Practice and Theory,2006,14(8):1059-1072.
[18] 马吉恩,徐兵,杨华勇. 轴向柱塞泵流动特性理论建模与试验分析[J]. 农业机械学报,2010,41(1):188-194. MA Jien,XU Bing,YANG Huayong. Modelling and experiment study on fluid character of axial piston pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(1):188-194.
[19] 张建中,杜鹏飞,张希建,等. 反渗透海水淡化能量回收装置的研制[J]. 水处理技术,2010,36(6):42-46. ZHANG Jianzhong,DU Pengfei,ZHANG Xijian,et al. Study of energy recovery for reverse osmosis seawater desalination system[J]. Technology of Water Treatment,2010,36(6):42-46.
[20] 陈金增. 船舶海水淡化及节能技术研究[D]. 武汉:华中科技大学,2010. CHEN Jinzeng. A study of marine seawater desalination & energy reserve technology[D]. Wuhan:Huazhong University of Science and Technology,2010.