Tunnel Boring Machine Seals

[Engineering shield mechanical seals] tunnel boring machine seals - also known as shield machine seals, is a tunnel boring machine using the shield method. The construction method of the shield is the "shield" (referring to the supporting segment) of the tunnel that is constructed by the road-header at the same time of excavation, which is different from the open construction method. Internationally, the generalized shield machine can also be used in rock formations, but it is different from the open type (non-shield method) tunnel boring machine. In our country, the tunnel boring machine used for soft ground is called (narrow sense) shield machine, and the one used for rock formation is called (narrow sense) TBM. 

Shield machines are generally divided into hand-digging shields, extrusion shields, semi-mechanical shields, and mechanical shields according to their working principles. The seal at the hinged device of the shield machine is particularly important. DSH's engineering shield mechanical seals: In recent years, they have been widely used in the construction of high-speed railways and subways in Guangdong, Fujian, Hunan, Jiangxi, etc., and have made significant contributions!