Method for repairing gear of gear ring of main bearing of shield tunneling machine

• Main Authors: YOU PEILONG, HU RUI, YANG YUCHAO, WANG XIAOGANG, WANG SHIYU, SUN JIE, HUANG YANFEI, SHI QINGHAO
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2024
• Subjects: COMBINED OPERATIONS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; OTHER WORKING OF METAL; PERFORMING OPERATIONS; TRANSPORTING; UNIVERSAL MACHINE TOOLS

The invention belongs to the technical field of shield tunneling machines, and discloses a shield tunneling machine main bearing gear ring gear repairing method which comprises the following steps that a damaged gear is polished to be in smooth transition, cracks on the surface of the gear are detected and eliminated, and the polished face of a to-be-repaired gear is cleaned; the gear to be repaired is preheated, and meanwhile, the gear outside the preheating range is subjected to heat insulation protection; a welding rod is dried before welding, grinding is conducted after welding of a filling layer is completed, then surface layer welding is conducted, and welding stress is eliminated through a hammering method in the welding process; after welding, the gear to be repaired is subjected to post-heating treatment, then a weld joint is covered with heat preservation cotton, and the gear is cooled to the room temperature; the weld reinforcement is polished, and then nondestructive testing is conducted; and fine