摘要
针对传统容积泵结构复杂且自密封性差的问题,设计了一种双作用式五叶刮板泵。利用上下刮板取代传统叶片泵的往复运动叶片,形成一种新型无阀式、结构紧凑的流体动力装置。基于2.5D动态网格耦合粘性壁面策略和试验测试相结合的方法,对双作用式五叶刮板泵进行流固耦合分析,得到了在流场特性影响下,转子-刮板在压力载荷作用下的应力分布以及变形量分布特性,以及转子-刮板的模态特性。结果表明:流固耦合作用对转子-刮板结构影响较大,转子-刮板的应力和变形随转速的增大而减小,当转速由900 r/min增至2 700 r/min,最大von-Mises应力减小24.56%,最大变形减小13.79%;不同负载压力对转子-刮板各阶振动频率没有明显变化,湿模态振动频率略低于流固耦合作用下的振动频率。该研究为双作用式五叶刮板泵的结构优化设计提供了一定的参考。
Aiming at the issues of complex structure and poor self-sealing in traditional positive displacement pumps,a double-acting five-blade scraper pump was designed.Using the up-and-down scrapers to replace the reciprocating vanes found in traditional vane pumps,creating a novel non-valved,compact fluid power device.Based on the 2.5D dynamic grid coupled viscous wall strategy and experimental testing,a fluid-solid coupling analysis was conducted on a double-acting five-blade scraper pump.The stress distribution and deformation distribution characteristics of the rotor scraper under pressure load were obtained under the influence of flow field characteristics,as well as the modal characteristics of the rotor scraper.The results indicate that the fluid-solid coupling significantly affects the structure of the rotor-scrapers.The stress and deformation of the rotor scrapers decrease with the increasing of rotational speed.Specifically,with the rotational speed increased from 900 r/min to 2700 r/min,the maximum equivalent stress decreases by 24.56%,and the maximum deformation decreases by 13.79%.The vibration frequency of rotor and scraper under different load pressure has no obvious change,and the wet mode vibration frequency is slightly lower than that under fluid-solid coupling.This study provides valuable insights into the structural optimization and design of double-acting five-blade scraper pumps.
作者
李铭浩
张世功
张洪信
王冲
LI Minghao;ZHANG Shigong;ZHANG Hongxin;WANG Chong(School of Qingdao University,Qingdao 266071,China;Qingte Group Limited,Qingdao 266041,China)
出处
《流体机械》
北大核心
2025年第5期64-72,共9页
Fluid Machinery
基金
国家自然科学基金项目(52075278)
青岛市科技惠民示范专项(No.4-1-8-cspz-2-nsh)。
关键词
双作用式五叶刮板泵
内流场
流固耦合
模态分析
double-acting five-blade scraper pump
internal flow field
fluid-solid coupling
modal analysis
