yaw bearing

• Yaw bearing is a special type of bearing mainly used to withstand combined radial and axial loads, with high precision and stability requirements. In wind turbines, the yaw bearing is installed on the nacelle base,
  Used to support the entire cabin and ensure the directionality of the pod to the positive wind force through yaw adjustment, so that the cabin axis can track the changing and stable wind direction. At the same time, the cable is automatically untied when the cable from the cabin to the tower bottom reaches the set twist angle.

• Structure: Yaw bearings typically use four point contact ball bearings with a “zero clearance” design, with specially designed and machined grooves, consisting of inner and outer rings, rolling elements, and retainers. Some yaw bearings also come with external gear rings, which mesh with small gears in the yaw drive mechanism to achieve rotation of the engine compartment.
  characteristic

  High load-bearing capacity: capable of withstanding huge axial loads, radial loads, and overturning moments to adapt to the stress requirements of wind turbines under different operating conditions.
  High precision: It has high rotational and positioning accuracy, ensuring that the cabin can accurately track wind direction changes and improve wind energy utilization efficiency.
  High reliability: Reliability is emphasized in the design and manufacturing process, generally requiring a service life of more than 20 years to reduce the operation and maintenance costs of wind turbines.
  Good sealing performance: Due to installation outdoors, it is necessary to have good sealing performance to prevent impurities such as dust and moisture from entering the bearing and affecting its normal operation.

• Material: High carbon chromium bearing steel is the mainstream material for yaw bearing manufacturing, with characteristics such as high strength and high wear resistance. In addition, some high-performance yaw bearings also use special alloy or ceramic materials to improve the bearing’s high temperature resistance, corrosion resistance, and fatigue resistance.
  manufacturing process

  Heat treatment process: Advanced heat treatment processes such as vacuum quenching, ion nitriding, etc. are used to improve the hardness, strength, and fatigue life of bearings.
  Surface treatment technology: By using surface treatment techniques such as chrome plating, shot peening, and laser cladding, the corrosion and wear resistance of bearings are enhanced.
  Machining accuracy control: During the machining process, it is necessary to strictly control the dimensional accuracy and positional tolerances of each component to ensure the assembly accuracy and rotation accuracy of the bearings.

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