Shield tunneling machines have the characteristics of large size, low speed, heavy load, and high pressure, and the working environment is relatively harsh. Changes in production process parameters have a significant impact on equipment operating conditions, and these factors can cause an increase in equipment failure rates.

Due to its high cost, repairing a shield machine in the event of a major malfunction can result invery bigOn the other hand, the maintenance costs will seriously affect the progress of the project and cause significant losses to the construction.

Due to its large size, the shield tunneling machine is also completed by first disassembling and then assembling when entering the underground. When the shield machine is in operation, it is operated by personnel in the main control room, and all related equipment of the shield machine is controlled by buttons in the main control room. It is precisely based on this working mode that if the equipment malfunctions, the difficulty of maintenance will be very high.

There are also many oil using equipment in shield tunneling machines, such as gears, hydraulic systems, bearings, etc. The oil change method for these equipment is generally regular, which will result in a significant annual oil change cost. At the same time, there are also good oils that are replaced, and bad oils that continue to be used before the oil change cycle. Therefore, timely and effective oil monitoring of various lubrication points of shield tunneling machines is necessary to improve the reliability of key equipment such as shield tunneling machines.