Supercharged hydraulic system for jack of TBM heading machine and supercharging method

Abstract

The invention provides a supercharged hydraulic system for a jack of a TBM heading machine. The supercharged hydraulic system comprises a bracing valve set, a bracing pressure sensor, a supercharged high-pressure bracing valve set, a first jack oil cylinder and a second jack oil cylinder. According to the system, the fast stretching and fast contracting actions of the jack oil cylinder can be achieved, and on the other hand, supercharged high-pressure bracing of the jack can be achieved, and a bracing pump can achieve high-pressure bracing on the jack simply by providing small pressure; and the model selecting requirement for the bracing pump is reduced, and the service life of the bracing pump is prolonged. In addition, the invention provides a supercharging method adopting the supercharged system. The supercharging method comprises the steps that 1, the pressure values of the first jack oil cylinder and the second jack oil cylinder are set; 2, the bracing pressure sensor detects theactual pressure values of the first jack oil cylinder and the second jack oil cylinder; and 3, the supercharged system selects the bracing valve set or the supercharged high-pressure bracing valve setto work according to the actual pressure value of the bracing sensor. The method is easy to operate and easy to achieve.

Description

technical field [0001] The invention relates to a pressurized hydraulic system and a pressurized method for a spreader shoe of a TBM roadheader, and belongs to the technical field of tunnel excavation equipment. Background technique [0002] The tensioning system is one of the important subsystems of the TBM hard rock roadheader equipment. During the excavation process, the propulsion force and torque of the cutter head are transmitted to the cave wall through the brace shoes on the cave wall. The control of the hydraulic system can Realize the functions of fast extension of the stretcher, high-pressure tension, high-pressure relief, and rapid retraction. In order to ensure the stretching force of the stretcher, the stretching pressure of the stretcher often needs to reach more than 30MPa, especially for soft rock geology. To ensure the tensioning pressure, the tensioning oil pump needs to be frequently loaded above 30MPa, which puts forward high requirements for the hydraul...

AI Technical Summary

Problems solved by technology

[0002] The tensioning system is one of the important subsystems of the TBM hard rock roadheader equipment. During the excavation process, the propulsion force and torque of the cutter head are transmitted to the cave wall through the brace shoes on the cave wall. The control of the hydraulic system can Realize the functions of fast extension of the stretcher, high-pressure tension, high-pressure relief, and rapid retraction. In order to ensure the stretching force of the stretcher, the stretching pressure of the stretcher often needs to reach more than 30MPa, especially for soft rock geology. To ensure the tensioning pressure, the tensioning oil pump needs to be frequently loaded above 30MPa, which puts forward high requirements for the hydraulic system, especially the performance of the tensioning oil pump. At present, the tensioning oil pump of the TBM hard rock roadheader often chooses imported well-known Brand heavy-duty high-pressure plunger pump, the design cost is higher

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