Shield cutter ring is a key component of shield machine, its wear resistance and impact resistance directly affects the progress and quality of tunneling project, while the traditional material is easy to wear and fracture, which increases the maintenance cost.
What is a shield cutter ring？
Shield cutter ring is an important part of shield machine, which is mainly used for tunnel boring and underground construction. Shield machine is a kind of large mechanical equipment, which cuts, breaks and excavates the ground through the rotating cutter plate and cutter at the front end of the machine, so as to advance the construction of tunnels. As a key component on the cutter plate of the shield machine, the main function of the shield cutter ring is to directly contact and break up the rock and soil to ensure the smooth progress of tunnel boring.
Types of shield cutter rings
According to specific engineering needs and stratigraphic conditions, shield cutter rings can be divided into various types, including:
• Hobbing knife: used for breaking hard rock layers, with high wear resistance and impact resistance.
• Shovel knife: used for cutting softer formations, such as clay and sand.
• Scraper knife: used to clean the soil and debris on the surface of shield cutter plate to ensure the digging efficiency.
The main functions and characteristics of the shield cutter ring:
• Crushing rock and soil: The shield cutter ring is installed at the front end of the shield machine's cutter plate. As the cutter plate rotates, the cutter ring cuts and crushes the rocks and soil in the strata, enabling the shield machine to move forward.
• Wear resistance: Since the shield cutter ring is in direct contact with hard rock and soil, its surface needs to have high wear resistance to prolong its service life and reduce replacement frequency and downtime.
• Impact resistance: Shield cutter rings are subjected to tremendous impact during the working process, so they need to have good impact resistance to prevent fracture or damage in high-intensity working environments.
• Material selection: Traditional shield cutter rings are usually made of high-strength wear-resistant alloy materials, such as carbide steel. In order to further improve its performance, surface cladding technology has been introduced in recent years to deposit a layer of high hardness and wear-resistant alloy cladding on the surface of the cutter ring.
Surface cladding of shield cutter rings
By depositing a high hardness, high wear-resistant alloy cladding on the surface of the shield cutter ring, the technology significantly improves the cutter ring's wear-resistant performance and service life, reduces the frequency of replacement and downtime, and lowers project costs.
Areas of application for shield cutter rings
Shield cutter ring is an important Tunnel Boring Machine (TBM, Tunnel Boring Machine) accessory, which is mainly used for shield machine to break rocks, soil and other underground obstacles during the tunneling process. Its application areas include but are not limited to the following:
• subway construction
• Railway tunnels
• Highway tunnels
• water conservancy projects
• Urban underground pipe corridors
• Mining
• Oil and gas pipelines
• Nuclear power plant construction
The application of shield cutter rings in these fields improves the efficiency and safety of tunnel boring, reduces construction costs and environmental impact, and is an indispensable and important tool in modern underground engineering.
Post time: Aug-12-2024