Five-main-arm composite cutter head for shield tunneling machine

• Main Authors: HU HAO, REN YONG, ZHAO BIN, CHEN JIANFU, ZHANG SHUAIKUN, WEI CHAOCHAO, OH OK-RYE, XU HUIWANG, CHEN PENG, DONG BING, SHENG ZHENGYANG
• Format: Patent
• Language: Chinese; English
• Published: 21.07.2023
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention relates to the technical field of shield tunneling machines, in particular to a five-main-arm composite cutterhead for a shield tunneling machine, which comprises a cutterhead body, the cutterhead body is provided with a mounting part connected with a cutterhead shell, five main arms are arranged on the surface of the cutterhead body, and normal-pressure hobs are uniformly arranged on the surface of each main arm from the center to the edge. Edge under-pressure hobs are arranged on the outer edges of the main arms, under-pressure hobs are arranged on the cutterhead body between the adjacent main arms, and normal-pressure scrapers and under-pressure scrapers are arranged on the two sides of the main arms in a staggered mode. The normal-pressure hobs and the under-pressure hobs are arranged on the cutterhead at the same time, so that the distance between the hobs on the cutterhead is smaller, the tracks of the hobs are more, and the rock breaking efficiency of the cutterhead is improved; and when