摘要
石油化工行业的流体介质大多是强酸、强碱、高温、腐蚀性强等特性;此类介质的压力测量是不能直接用压力仪表进行测量的;而是采用膜片式压力表间接测量的方式,但是目前的膜片式压力表仍存在测量误差大,膜片损坏频率高的问题。通过利用三维CAD建模和FEMAP有限元分析技术对膜片式压力表的膜片进行分析,为膜片的优化设计提供了研究方法和理论依据;并提出了一种延长膜片寿命的阻尼式引压方式,经现场使用证明可以延长膜片压力表的使用寿命。
Fluid media used in the petrochemical industry are characteristic of being highly acid,alkaline,corrosive,and of high temperature.The fluid medium pressure is to be indirectly measured by a diaphragm manometer rather than directly by a pressure gauge.However,the existing diaphragm manometers are problematic due to the extent of measurement error and the frequency of diaphragm damage.Through three-dimensional CAD modeling and FEMAP to analyze the membrane of diaphragm pressure gauge,and provide a methodology and theoretical basis for optimal design of the membrane;and then a damped pressure mode is proposed to extend the life of membrane,which is tested to be a good way of extending life of the membrane pressure gauge from field observation.
出处
《机械设计与制造》
北大核心
2012年第6期36-38,共3页
Machinery Design & Manufacture
基金
上海市重点学科建设项目资助(B602)
