Cutterhead main bearing sealing ring|High pressure and dustproof sealing solution
Product Overview: The core role of the cutter head main bearing seal
The cutter head main bearing seal is the core sealing element of heavy machinery such as shield machines and tunnel boring equipment and is specially designed for dynamic sealing of the main bearing under extreme working conditions. Its core features include:
High-pressure sealing: Maintain sealing performance under ultra-high pressure (up to 50MPa) generated by cutter head rotation and geotechnical friction to prevent lubricating oil leakage or external sediment ingress.
Dustproof and anti-fouling: the multi-layer sealing structure blocks dust, mud, and other impurities, prolong the service life of the bearing, and reduces the failure rate of the equipment.
Temperature and wear resistance: adapt to the temperature difference of -30°C to 200°C, and withstand high-speed rotation (>5rpm) and high load conditions for a long time.
Structure & Materials: Professionally designed to match the needs of heavy machinery
Multi-layer composite structure: The combination of the main sealing layer, the dustproof layer, and the auxiliary support layer improves the compressive resistance and stability, and the dynamic sealing efficiency is increased by more than 40%.
High-performance rubber materials:
Fluoroelastomer (FKM): High-temperature resistance (200°C), chemical corrosion resistance, suitable for wet and acidic environments of slurry shield machines.
Hydrogenated Nitrile Butadiene Rubber (HNBR): High abrasion resistance, anti-aging, suitable for sand and gravel friction scenarios of EPB shields.
Customized design: It supports the customization of inner diameter (50-2000mm), cross-sectional shape (rectangular, V-shaped, U-shaped), and hardness (70-95 Shore A), suitable for mainstream shield machine models such as Herrenknecht and Robbins.
Performance Advantage: Why Choose Professional Seals?
Long service life: Through 500,000 simulated rotation tests, the service life is more than 5,000 hours, reducing the cost of downtime and maintenance.
Adaptable to harsh working conditions: IP68 dustproof and waterproof certification and the pressure resistance level reaches IPxx (customized according to customer needs).
Environmental compliance: in line with ROHS and REACH standards, no heavy metals and harmful substances are released, and meet the requirements of European and American market access.
Application scenarios and adaptive devices
Applicable equipment: the main bearing of the cutter head of the shield machine, the bearing of the mining crusher, slewing support system of port machinery.
Applicable fields: subway tunnel engineering, water conservancy tunnel construction, mining equipment, submarine tunneling.
Quality control and certification: to ensure industrial-grade reliability
Production standards: Strictly follow the IATF 16949 quality management system, and the whole process is produced in a dust-free workshop to ensure the cleanliness of the seals.
Testing equipment: equipped with coordinate measuring instrument, high-voltage pulse testing machine and high and low temperature alternating test chamber to simulate the sealing performance under real working conditions.
Qualification certificate: Provide material SGS report, wear resistance test data, and mass production consistency certificate, and support third-party inspection.
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