Wind turbines are core equipment of the new energy wind power industry. The main shaft transmission, yaw rotation and pitch adjustment mechanisms are the key force-bearing parts of the unit, operating long-term under extremely harsh conditions: ultra-large alternating combined loads, instantaneous strong wind impact, extreme day and night temperature difference on plateaus and deserts, low-temperature cracking risk in winter, continuous intrusion of wind sand and dust, offshore salt spray corrosion, and 24-hour uninterrupted low-speed heavy-duty operation all year round. Wind power equipment features extremely difficult maintenance. Most wind turbines are installed in high mountains, wilderness, gobi deserts and offshore areas with extremely high hoisting and overhaul costs and limited downtime windows. Once bearings suffer from fatigue wear, excessive clearance or jamming and abnormal noise, it will directly cause excessive unit vibration, reduced power generation efficiency, and in severe cases, main shaft seizure, blade failure and unit shutdown, resulting in huge power generation losses and high operation and maintenance costs. Ordinary tapered roller bearings cannot adapt to extreme wind power conditions: steel toughness decreases in low-temperature plateau environments, prone to embrittlement and raceway peeling; fine and hard wind sand dust cannot be completely blocked by ordinary sealing structures, and dust ingress contaminates grease and causes abrasive wear to accelerate bearing failure; frequent changes in wind speed and direction lead to continuous load fluctuation, and ordinary bearings with insufficient fatigue resistance are prone to premature fatigue pitting under long-term alternating stress; humid and salt spray offshore environments easily cause bearing rust and seal aging; ordinary bearings lack durable lubrication for year-round uninterrupted operation, prone to dry friction and rapid precision attenuation, failing to meet the ultra-long service life requirements of wind power equipment.

Focusing on transmission supporting field for new energy wind power equipment, Japan NMT specially develops low-temperature and sand-resistant heavy-duty tapered roller bearings dedicated for wind turbine units to solve industry pain points of ordinary wind power bearings such as low-temperature embrittlement vulnerability, sand abrasion susceptibility, alternating load fatigue, salt spray rust and precision attenuation under ultra-long operation. Taking advantage of bidirectional linear load-bearing structure of tapered rollers, combined with five core upgrades including wind power grade ultra-high toughness refined bearing steel, fully enclosed multi-layer windproof and sandproof sealing, low-temperature hardening super-finishing technology, long-life low-temperature and salt spray resistant lubrication and wind power exclusive precise clearance matching, it fully adapts to extreme working conditions of main shafts, yaw and pitch mechanisms for all onshore and offshore wind turbines. It fundamentally solves problems including low-temperature bearing embrittlement and cracking, sand abrasive wear, alternating fatigue, seal leakage and precision attenuation, stabilizes wind turbine operation accuracy and power generation efficiency, adapts to the ultra-long service cycle of wind power equipment, and greatly reduces wind farm operation and maintenance costs and downtime losses.

Core Product Advantages

1. Ultra-large bidirectional combined load bearing withstands alternating strong wind impact and dynamic eccentric load: Adopting tapered roller linear contact structure, it bears ultra-high radial loads and axial thrust simultaneously with uniform and reasonable load distribution. It perfectly adapts to dynamic alternating impact caused by frequent wind speed and direction changes, restrains eccentric wear of main shafts and rotary mechanisms, stably controls axial play, and eliminates unit jitter and unstable power generation.

2. Wind power grade ultra-high toughness bearing steel features low-temperature embrittlement resistance and long-term fatigue resistance: Selected ultra-high purity alloy bearing steel dedicated for wind power equipment undergoes deep cryogenic tempering and multiple constant-temperature hardening treatments to optimize low-temperature metallographic structure, avoid steel embrittlement and cracking in extreme sub-zero environments, and greatly improve fatigue resistance under long-term alternating loads, meeting the 20+ year long-term service requirements of wind turbines.

3. Fully enclosed multi-layer labyrinth sealing resists wind sand, salt spray and dust ingress: Equipped with exclusive thickened aging-resistant seal lip & multi-layer dust and sand-proof composite structure for wind power conditions. It resists high and low temperature aging, wind sand scouring and offshore salt spray corrosion, and intercepts gobi fine sand, plateau dust and offshore salt spray moisture layer by layer, completely solving problems of grease contamination, internal abrasive wear and seal leakage.

4. Low-temperature super-finishing strengthening technology ensures stable operation and low precision attenuation: Raceways and rolling elements adopt cryogenic stabilization treatment combined with micron-level super-finishing grinding to optimize low-temperature contact accuracy, resist deformation in low-temperature environments, maintain extremely low operation friction coefficient, effectively reduce vibration and abnormal noise during low-speed heavy-duty operation of wind turbines, and keep long-term stable transmission precision.

5. Wind power customized clearance & low-temperature long-life lubrication system: Internal clearance is precisely matched according to wind turbine characteristics of low-speed heavy load, extreme temperature fluctuation and all-weather continuous operation to avoid low-temperature seizure and high-temperature expansion locking. Matched with special long-life grease resistant to low temperature, dust and salt spray for wind power, it resists dry coking and failure in extreme environments and greatly extends wind farm maintenance intervals.

Application Scenarios

Main shaft heavy-duty bearings for onshore plateau and desert wind turbines, yaw rotary mechanism bearings for wind turbines, pitch adjustment mechanism support bearings, low-temperature and corrosion-resistant transmission bearings for offshore wind power, transmission support parts of small and medium-sized wind turbines, and heavy-duty alternating load transmission systems for all new energy wind power equipment.

Precision Quality Assurance

NMT tapered roller bearings for wind power new energy are manufactured strictly in accordance with Japanese wind power heavy equipment manufacturing standards. Selected special ultra-high toughness low-temperature resistant bearing steel undergoes low-temperature embrittlement test, wind sand dust sealing durability test, salt spray anti-corrosion test, ultra-long cycle alternating fatigue test and high-low temperature cycle aging test. The products feature powerful bidirectional load capacity, excellent low-temperature stability and outstanding wind sand and corrosion resistance, fully adapting to all-weather extreme wind power conditions on plateaus, gobi deserts, mountains and offshore areas, and meeting the ultra-long service life design requirements of wind power equipment.

Product Range

Heavy-duty tapered roller bearings for wind turbine main shafts, long-life sand-resistant bearings for yaw mechanisms, precise wear-resistant bearings for pitch mechanisms, low-temperature resistant bearings for onshore wind power, corrosion-resistant sealed bearings for offshore wind power, customized large-size non-standard bearings for large wind power equipment.

Brand Strength

Japan NMT focuses on R&D and manufacturing of bearings for heavy-duty wind power new energy equipment under working conditions of ultra-large alternating loads, strong wind impact, extreme temperature difference, wind sand and salt spray erosion and ultra-long cycle continuous operation, specializing in core technologies of bidirectional load balance, low-temperature material stability, wind sand sealing protection and ultra-long fatigue life control. With Japanese wind power grade steel cryogenic heat treatment technology, exclusive extreme condition sealing technology and wind power simulation durability testing system, it accurately solves industry pain points of wind power bearings such as low-temperature embrittlement cracking, wind sand abrasive wear failure, alternating fatigue spalling, seal aging and leakage, and frequent maintenance shutdown, supplying high-load, low-temperature resistant, wind sand resistant and long-term stable core transmission bearing components for global onshore and offshore wind power equipment manufacturers.