A design method of multi-tooth rock breaking cutter of a cutter head of a cellular tunnel boring machine

By designing an involute hobbing tooth structure and a honeycomb cutter shaft on the cutter ring, the compatibility and vibration problems of tunnel boring equipment were solved, achieving efficient and stable tunnel boring and extending the service life of the equipment.

CN121502955BActive Publication Date: 2026-04-14DALIAN UNIV OF TECH +2
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Patent Information

Application Number
CN202610043945.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-14
Publication Date
2026-04-14
Estimated Expiration
2046-01-14

AI Technical Summary

Technical Problem

The existing tunnel boring equipment has poor adaptability of the cutter head structure, resulting in slow tunneling speed, severe vibration and easy damage to the main load-bearing structure, which cannot meet the construction requirements under geological conditions of hard rock, soft rock and alternating mud and water.

Method used

The design incorporates an involute gear hobbing cutter ring and a honeycomb cutter shaft. By creating involute gear cutting teeth on the cutter ring and employing a honeycomb porous structure at the cutter shaft, the rock-breaking efficiency is enhanced and vibration is reduced, making it adaptable to various geological conditions.

Benefits of technology

It increased tunnel excavation speed, reduced equipment vibration and damage, extended the service life of the cutter shaft, and reduced equipment operating inertia and energy consumption.

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Abstract

The application belongs to the technical field of tunneling construction equipment, and discloses a design method of a multi-tooth rock breaking cutter of a cutter head of a honeycomb type tunnel boring machine. The design method designs involute gear cutting tooth structure at the overall circumference of a cutter ring of a rolling cutter, and simultaneously uses radial force and shearing force generated by gear cutting to break rocks, so as to replace the traditional rolling cutter which only relies on the extrusion force and impact force of the cutter head to cut and break rocks, and to realize high-speed cutting construction of the tunnel boring machine. Meanwhile, the traditional solid connecting structure cutter shaft is improved to be a honeycomb type porous structure rolling cutter shaft. The honeycomb structure is composed of a series of hexagonal or other polygonal honeycomb structures arranged in the shaft body in a regular manner, and forms a continuous, uniform and periodic topological structure. The structure design improves the durability and stability of the cutter shaft under harsh working conditions on the premise of ensuring that the cutter shaft has sufficient strength and rigidity, thereby prolonging the service life of the cutter shaft.
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