农机化研究2018，Vol.40Issue(11)：17-22,6.
容积泵稳压气室稳压特性研究
Study on Characteristics of Pressurized Gas Chamber of Volumetric Pump Based on CFD Technique
摘要
Abstract
In order to enrich the design theory of the regulator chamber of the positive displacement diaphragm pump,the effect of the regulator chamber on the pressure fluctuation of the diaphragm pump is further studied.The ZMB240 piston diaphragm pump is used as the research object., The fluctuation characteristics of its steady gas chamber are studied. The three-dimensional finite element analysis model of ZMB 240 piston diaphragm pump with steady gas chamber and without gas pressure chamber was established respectively.Simulation analysis was carried out to monitor the output pres-sure fluctuation in one cycle of the diaphragm pump.Under the simulation results are compared.The results show that the amplitude of the outlet pressure fluctuates 0.284MPa and the nonuniformity is 25.94%when there is no steady gas cham-ber.In the presence of the steady pressure chamber,the initial pressure is 0.3,0.4,0.5,0.6 and 0.7MPa respectively, The amplitude of pressure fluctuation is 0.199、0.154、0.104、0.128 and 0.217MPa, and the nonuniformity is 28.03%、23.44%、16.99%、19.94%and 29.64%.respectively.It is concluded that the existence of the regulator chamber can re-duce the output pressure fluctuation of the diaphragm pump to a certain extent and reduce the amplitude of the outlet pressure pulsation,but the initial pressure of the regulator chamber must match the working pressure of the diaphragm pump.Through the simulation analysis of the pressure fluctuation response characteristics of the regulator chamber, the suppression mechanism of the pressure pulsation of the diaphragm chamber is explained,and its frequency response char-acteristic is obtained,which is provided for the optimal design of the positive pressure chamber.Theoretical guidance.关键词
容积泵/稳压气室/压力波动/流固耦合Key words
volumetric pump pump/regulator chamber/pressure fluctuation/luid-solid coupling分类
农业科技引用本文复制引用
宋俊伟,吴姝,魏新华..容积泵稳压气室稳压特性研究[J].农机化研究,2018,40(11):17-22,6.基金项目
国家自然科学基金项目(51275215) （51275215）
国家重点研发计划项目(2016YFD0700104) （2016YFD0700104）
公益性行业(农业)科研专项(201503130) （农业）
