/ Wind Turbine Bearings

Pitch bearing

Pitch Bearings of Wind Power
Pitch bearings are installed at the root of wind turbine blades. They are responsible for adjusting the blade angle to control the wind energy capture efficiency, and can also adjust the blade position in extreme weather to protect the unit. The following are their detailed parameters and characteristics:
Structural Characteristics
The common structures are double - row four - point contact ball bearings or full complement cylindrical roller bearings. These structures can cope with the high dynamic loads caused by frequent start - stop of blades. Similar to yaw bearings, high - performance pitch bearings also apply the non - soft zone quenching technology to enhance the uniformity of raceway hardness. Meanwhile, the integrated design of the gear ring is adopted in their structure, which improves the accuracy of blade angle adjustment. The refined design of the lubrication system ensures that the bearings can still maintain good lubrication performance during frequent mechanical movements.
Processing Size Range
Their size is relatively smaller than that of yaw bearings. The outer diameter usually ranges from 1000mm to 2500mm. This size range can well match the installation space at the root of wind turbine blades. For large - size blades of megawatt - class wind turbines, the size of the matched pitch bearings will be adjusted according to the blade weight and load requirements.
Product Advantages
Product Description

Pitch Bearing for Wind Turbines - Professional Industrial Solutions

When you need reliable wind turbine performance, the pitch bearing becomes your most critical component. This specialized slewing ring bearing, installed at the root of each wind turbine blade, controls blade angle adjustments for optimal aerodynamic efficiency. Your wind energy operations depend on these bearings to maintain constant power output while protecting your equipment during extreme weather conditions. With over 30 years of bearing manufacturing expertise, Luoyang Auto Bearing Co., Ltd. understands the unique challenges you face in wind power applications. Our engineering team delivers the product solutions that withstand the demanding oscillating motion and complex load spectra inherent in modern wind turbine operations.

Pitch bearing

What Is a Pitch Bearing and How Does It Work?

A product functions as the rotating interface between the turbine hub and blade root. Unlike conventional rotating bearings, these components operate primarily through oscillating motion within a -5° to 90° range. This unique motion pattern subjects the bearing to specific tribological challenges including false brinelling and fretting corrosion.

The bearing structure typically employs double-row four-point contact ball configurations or full complement cylindrical roller designs. These arrangements effectively manage the high dynamic loads generated during frequent blade start-stop operations. The integrated gear ring design enhances blade angle adjustment precision while maintaining structural integrity under varying wind conditions.

Technical Specifications and Dimensions

Bearing Category
Model
Inner Diameter (mm)
Outer Diameter (mm)
Width (mm)
Load Capacity (kN)
Applicable Wind Turbine Power (MW)
Design Feature
Application Position
Material Grade
Main Shaft Spherical Roller Bearing
232/530 CA/W33
530
980
308
8500
3.0-5.0
Double-row, self-aligning, grease lubrication
Main shaft (low-speed end)
20CrNi2Mo
Main Shaft Spherical Roller Bearing
232/600 CA/W33
600
1090
336
10200
5.0-8.0
Enhanced cage structure, high-impact resistance
Main shaft (low-speed end)
20CrNiMo
Gearbox Cylindrical Roller Bearing
NU 234 ECML/C3
170
310
52
1250
1.5-3.0
Single-row, cylindrical roller, C3 clearance
Gearbox intermediate shaft
GCr15SiMn
Gearbox Cylindrical Roller Bearing
NU 240 ECML/C4
200
360
58
1800
3.0-5.0
High-precision grade, optimized roller profile
Gearbox high-speed shaft
GCr15
Yaw Bearing (Four-point Contact Ball Bearing)
013.40.2500
2100
2500
120
4500
2.0-3.0
Four-point contact, integral gear structure
Yaw system
42CrMo
Yaw Bearing (Four-point Contact Ball Bearing)
013.40.3550
3100
3550
150
6800
5.0-8.0
Split-type design, easy installation
Yaw system
42CrMo
Pitch Bearing (Single-row Four-point Contact)
011.40.1250
1050
1250
80
2200
1.5-2.0
Lightweight, sealed structure
Pitch system (blade root)
40Cr
Pitch Bearing (Single-row Four-point Contact)
011.40.1600
1350
1600
100
3500
3.0-5.0
High-torque bearing capacity, corrosion-resistant coating
Pitch system (blade root)
42CrMo
Generator Bearing (Deep Groove Ball Bearing)
6334 M/C3
170
360
72
950
1.0-2.0
High-speed rotation, low friction
Generator rotor shaft
GCr15
Generator Bearing (Angular Contact Ball
7328 BECBM
140
300
62
1100
2.0-3.0
Angular contact, paired installation
Generator stator shaft
GCr15SiMn

Advanced Design Features

Non-Soft Zone Quenching Technology

Our manufacturing process applies advanced heat treatment to ensure uniform raceway hardness. This technology eliminates soft zones that could lead to premature wear under the oscillating loads typical in wind turbine applications.

Optimized Lubrication System

The refined lubrication design maintains consistent grease distribution during frequent mechanical movements. This system reduces maintenance intervals and ensures reliable operation throughout the Pitch bearing's service life.

Enhanced Sealing Protection

Multiple sealing layers protect against moisture ingress and contamination. This design proves essential for offshore installations where salt spray and high humidity create challenging operating environments.

Performance Advantages in Wind Power Applications

Tall Operational Precision

Our optimized raceway contact push conveyance minimizes edge point alteration mistakes. This exactness straightforwardly contributes to made strides control era productivity over shifting wind conditions.

Superior Weakness Resistance

Specialized fabric choice and controlled warm treatment forms convey remarkable anti-fatigue execution. Your hardware benefits from decreased disappointment likelihood amid visit start-stop cycles and rotating stack conditions.

Reduced Upkeep Requirements

Reliable fixing and oil plan amplifies benefit interims. This advantage demonstrates especially profitable for seaward wind turbines where upkeep get to remains troublesome and costly.

Pitch bearing

Application Scenarios

Onshore Wind Turbines (2MW - 5MW)

These establishments utilize dynamic pitch control frameworks requiring nonstop micro-adjustments. Our orientation handle high-cycle vibration whereas keeping up exact edge situating for ideal control bend management.

Offshore Wind Stages (6MW - 15MW+)

Large seaward turbines request supreme unwavering quality due to constrained support get to. Our upgraded fixing frameworks and anti-corrosion coatings withstand salt splash introduction whereas overseeing enormous inertial loads from edges surpassing 100 meters in length.

Cold Climate Installations

Arctic wind ventures require specialized low-temperature metallurgy tried to -40°C. Our manufactured oils keep up steady beginning torque in spite of thickness changes, anticipating pitch framework over-burden amid startup.

Quality Assurance and Manufacturing Excellence

Our three-level quality control system ensures consistent product performance:

  • Raw material inspection using certified bearing steel
  • In-process monitoring of critical manufacturing parameters
  • Finished product verification including vibration and life testing

Each bearing undergoes comprehensive testing of 12 core performance indicators. Our manufacturing process achieves an ex-factory qualification rate exceeding 99.9%, suitable for harsh operating conditions across different wind power applications.

Supply Chain and Delivery Capabilities

We maintain inventory of over 1,000 standard bearing types for rapid delivery within 48 hours. For customized solutions, our modular production process reduces lead times to 70% of industry standards. Large non-standard bearings with φ3000mm dimensions can be delivered within 15-20 days.

Pitch bearing

Technical Support Services

Our experienced engineering team provides comprehensive support throughout your project lifecycle:

  • On-site mapping services for equipment adaptation
  • Installation and replacement guidance
  • Predictive maintenance planning
  • 24-hour technical consultation

Why Choose Luoyang Auto Bearing?

With three decades of Pitch bearing industry experience, we combine independent manufacturing capabilities with strategic supply chain partnerships. Our integrated approach delivers both standard products and customized solutions for diverse wind power requirements.

Our metallurgical expertise ensures bearings withstand temperatures up to 500°C while maintaining precision rotation and noise control. This proven performance record makes us your reliable partner for critical wind turbine applications.

Ready to optimize your wind turbine performance with professional bearing solutions? Contact our technical team at auto@lyautobearing.com for detailed specifications and application engineering support.

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