Bearings for Wind Turbine Gearboxes
JTEKT Corporation (Official website) / Listed on page 3 of the document
Bearings for the various positions inside a wind turbine gearbox that raise the rotation of the main shaft to a speed suitable for power generation. Optimally designed according to type, load, and rotational speed.
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How to choose Rolling Bearings
Points to check when selecting, with the values for this product (Bearings for Wind Turbine Gearboxes).
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1. Bore and housing bore dimensions
Select the bore diameter d to match the shaft seat, the outside diameter D to match the housing bore, and the width B to suit the installation space. Main dimensions are standardized in ISO and JIS dimension series, so interchangeable products can be found by boundary dimension designation. For tapered roller bearings, also check the assembled width T; for thrust bearings, also check the height H.
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2. Dynamic load rating based on life calculation
The basic dynamic load rating Cr is the reference value for calculating rated life. Verify that the required life is met using the equivalent load during operation and the rotational speed. For ball bearings, life is proportional to the cube of the load ratio, so providing load margin greatly extends life.
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3. Margin for static and shock loads
The basic static load rating C0r is the allowable standard for permanent deformation generated at the rolling elements and raceways under stationary or low-speed conditions. For applications with oscillating motion or shock loads, confirm that a static safety factor against the maximum load is secured using C0r.
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4. Operating speed and lubrication method
The limiting speed differs by lubrication method, and separate values are given for grease lubrication and oil lubrication. Confirm that the normal operating speed does not exceed the limiting value, and in high-speed ranges also consider cage material and precision grade. The reference speed can also be consulted as a thermal guideline.
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5. Precision grade and internal clearance
Precision grades (P0, P6, P5, etc.) indicate rotational accuracy and dimensional accuracy; for high-precision applications such as machine tool spindles, select higher grades. Internal clearance (C2, CN, C3, etc.) is selected to allow for changes caused by interference fit and temperature differences during operation.
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6. Materials and lubrication suited to the environment
For corrosive, high-temperature, vacuum, or clean environments, select specifications such as rings and rolling elements made of stainless steel or ceramics, or solid lubricants and fluorine grease for vacuum use. Check the operating temperature range, low dust generation, and whether food-grade grease registration applies against the application conditions.
This guide was written by AI based on the listed products' documents and specification items.
Description
Bearing type, applied load, and rotational speed differ greatly at each position in the gearbox, so optimal design is performed through rigorous calculation. Special carburized steel and special surface treatment enable support for high speeds and severe lubrication conditions, and quality control is carried out according to market needs.
Features
- Special carburized steel and special surface treatment support high speed and severe lubrication conditions
- Load distribution analysis supported for planetary gear inner bearings and similar applications
Applications
- Gearboxes for wind power generation systems
FAQ
- Q. Where and with what design are bearings for wind turbine gearboxes used?
- A. They are used at various positions in the gearbox and are optimally designed according to bearing type, applied load, and rotational speed. Their role is to raise the rotation of the main shaft to a speed suitable for power generation.
- Q. What conditions can the bearings for gearboxes accommodate?
- A. Special carburized steel and special surface treatment enable them to support high speeds and severe lubrication conditions.
- Q. How is the design of gearbox bearings performed?
- A. Bearing type, applied load, and rotational speed differ greatly at each position in the gearbox, so optimal design is performed through rigorous calculation.
- Q. Are bearings for planetary gear inner positions also supported?
- A. Yes, load distribution analysis is supported for planetary gear inner bearings and similar applications.
Written by AI based on the content of the source documents.
Source documents
- Catalog 風力発電装置用製品 Open page 3
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