Li Genbao,Zhou Longbao,Liu Quanbing,Pan Keyu
(School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
Abstract:The compatibility of rubber sealing parts with Dimethyl ether(DME) in a compression ignition engine was studied.Chemical mechanism of rubber expansion in DME was analysed,and different rubber materials were selected to test the expansion,the tensile strength,the elongation at break,and the hardness.Comparative experiments show that fluorosilicone rubber(FMQ) exhibited little change in its mechanical properties and just a slight expansion was observed after a long time(40 days) immersing in DME blend(DME mixing with vegetable oil as lubricant).The results indicate that FMQ could well meet the material requirement of seals for DME engines.
Keywords:dimethyl ether; rubber; expansion