Abstract:

Compared to Herrenknecht shields, NFM shields consume more grease (such as lubrication grease, HBW grease and tail skin sealing grease). The difference between the grease consumption of these two kinds of shields is analyzed from the design, application and structure characteristics. It is concluded that the difference in the grease consumption is mainly caused by the structural difference in the grease consumption parts and that enough grease should be injected during shield boring so as to avoid damages to the machines.

Key words: shield, lubrication grease, HBW grease, tail skin sealing grease, consumption