液环真空泵吸排气段壳体型线耦合优化分析

兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (5): 35-42.

液环真空泵吸排气段壳体型线耦合优化分析

张人会^*1,2, 刘桂洪¹, 魏笑笑¹, 孟凡瑞³

1.兰州理工大学能源与动力工程学院, 甘肃兰州 730050;
2.兰州理工大学甘肃省流体机械及系统重点实验室, 甘肃兰州 730050;
3.淄博水环真空泵有限公司, 山东淄博 255200

收稿日期:2021-08-07 出版日期:2022-10-28 发布日期:2022-11-21
通讯作者: 张人会(1977-),男,江西九江人,教授.Email:zhangrhlut@163.com
基金资助:
国家自然科学基金(51979135),甘肃省重点研发计划项目(21YF5GA077),山东省重点研发计划重大科技创新工程(2019TSLH0308)

Coupling optimization analysis of casing profile in suction and exhaust for liquid-ring vacuum pump

ZHANG Ren-hui^1,2, LIU Gui-hong¹, WEI Xiao-xiao¹, MENG Fan-rui³

1. College of Energy and Power Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. Key Laboratory of Fluid Machinery and Systems of Gansu Province, Lanzhou Univ. of Tech., Lanzhou 730050, China;
3. Zibo Water Ring Vocuum Pump Factory Co. Ltd., Zibo255200, China

Received:2021-08-07 Online:2022-10-28 Published:2022-11-21

摘要/Abstract

摘要： 采用直接自由曲面变形方法对液环真空泵吸排气段整个壳体型线进行参数化控制,运用响应面法建立壳体型线与进口真空度和效率的多参数回归模型,基于NSGA-Ⅱ算法进行液环真空泵性能的多目标优化,并对比分析优化模型与初始模型的内流场和外特性.结果表明:NSGA-Ⅱ多目标优化得到真空度最优模型的真空度提升了4.5%,效率最优模型的效率提高了1.3%;壳体型线的各个区域对液环真空泵的进口真空度和效率都有显著影响,但吸气段壳体型线对液环真空泵性能的影响明显大于排气段;在传统设计的基础上,适当增大吸气段壳体的径向尺寸有利于提升泵进口真空度,具有较小吸气区流道面积扩散比和排气区流道面积收缩率的壳体型线水力效率更高;压缩区径向尺寸较小的壳体型线有利于提升排气口压力,减少排气口回流,从而提升泵的效率.

关键词: 液环真空泵, 壳体型线, 响应面法, 多目标优化

Abstract: The direct free-form surface deformation method was used to parameterize the whole casing profile in the suction and exhaust section of liquid-ring vacuum pump. The multi-parameter regression model of the casing profile for the inlet vacuum and efficiency was established byusing the response surface method. Multi-objective optimization of liquid-ring vacuum pump performance was carried out based on NSGA-Ⅱ algorithm, and the internal flow field and external characteristics of the optimized model and the initial model were compared and analyzed. The results show that the vacuum of the optimal vacuum model obtained by NSGA-Ⅱ multi-objective optimization is increased by 4.5%, and the efficiency of the optimal efficiency model is increased by 1.3%. All the different parts of the casing profile have a significant effect on the inlet vacuum and efficiency of the liquid-ring vacuum pump, but the influence of the casing profile in the suction section on the performance of the liquid-ring vacuum pump is obviously greater than that in the exhaust section. On the basis of traditional design, increasing the radial size of suction casing is helpful to improve the vacuum of the pump inlet. The smaller diffusion ratio of suction area and shrinkage of exhaust area would cause higher hydraulic efficiency in the pump. The casing profile with smaller radial size in the compression zone is beneficial to increase the vent pressure and reduce the back flow of the vent, thus improves the efficiency of the pump.

Key words: liquid-ring vacuum pump, casing profile, response surface method, multi-objective optimization

中图分类号:

TH36

张人会, 刘桂洪, 魏笑笑, 孟凡瑞. 液环真空泵吸排气段壳体型线耦合优化分析[J]. 兰州理工大学学报, 2022, 48(5): 35-42.

ZHANG Ren-hui, LIU Gui-hong, WEI Xiao-xiao, MENG Fan-rui. Coupling optimization analysis of casing profile in suction and exhaust for liquid-ring vacuum pump[J]. Journal of Lanzhou University of Technology, 2022, 48(5): 35-42.

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