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Tunnel boring machine seal-also known as shield machine seal, is a kind of tunnel boring machine using shield method. The shield construction method is the "shield" of the tunnel constructed by the boring machine while tunneling (referring to the supporting segment), which is different from the open construction method. The generalized shield machine in the world can also be used in rock formation, but it is different from the open (non-shield) tunnel boring machine.
In our country, the tunnel boring machine used in soft soil formation is called (narrow) shield machine, and the tunnel boring machine used in rock formation is called (narrow) boring machine. According to the working principle, the shield machine is generally divided into hand-dug shield, squeeze shield, semi-mechanical shield and mechanical shield. The seal at the hinge device of the shield machine is particularly important.
Engineering shield machinery seals: in recent years, they have been widely used in Guangdong, Fujian, Hunan, Jiangxi and other high-speed rail and subway construction facilities, and have made major contributions!
High cost performance seal products of Dongsheng seal (DSH seals, it has been widely used in aerospace, military industry, petroleum, metallurgy, electric power, coal, automobile, electronics, home appliances, sanitary ware, pump valve, paper making, transportation, food, agriculture, natural gas, engineering shield machine, hardware machinery seal Industry, the excellent performance has reached the quality level of the seal industry.