The determining methods of types of combustible gases in leak detecting and alarming for gas sleeve is analyzed, the advantages and disadvantages of installing gas sleeve in crossing road are discussed, and a method of filling polyurethane between gas pipeline and gas sleeve is put forward. 分析了燃气套管检漏报警中可燃气体种类的确定方法。探讨了穿越公路时安装燃气套管的利弊,提出在燃气管道和套管之间填充聚氨酯的方法。
The computer simulation of liquid metal flow during filling of plate and cylindrical sleeve diecasting has been carried out using numerical calculation method. 应用数值计算方法,对板类和套类压铸件充型过程中型腔内金属液流动进行了计算机模拟。
Development about New-typical Dewaxing Kettle with Filling Sleeve Pressured Quick Opening Mechanism 夹套式脱蜡釜新型承压快开门机构的开发
The broken chilling layer emerging in the course of filling molten metal in the cold-chamber sleeve and its effect on casting quality are analyzed. 研究了卧式冷空压铸机压室内金属液充填过程中产生的破碎激冷层及其对待件质量的影响;
Based on numerical simulation for mold filling of die casting process, the moving boundary condition was introduced to deal with the movement of the plunger and to simulate the flow field in the shot sleeve. 文中在压铸流场模拟的基础上,增加了移动边界条件处理冲头的移动过程,模拟了慢压射过程中压室内流体的流动形态。