Peripheral Equipment Product: Bearings for Yaw Drive Reducers
JTEKT Corporation (Official website) / Listed on page 3 of the document
High-load, high-rigidity tapered roller bearings and needle roller bearings used in yaw drive reducers of wind turbines. Contributes to compact design and longer service life.
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Specifications
| Improved Rated Capacity | 1.1x to 1.2x |
|---|---|
| Service Life Improvement | 2x or more |
How to choose Rolling Bearings
Points to check when selecting, with the values for this product (Peripheral Equipment Product: Bearings for Yaw Drive Reducers).
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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
Tapered roller bearings and needle roller bearings optimally designed to meet high reliability and high rigidity under gust conditions. To improve robustness, extreme rolling element design, special heat treatment, and optimal crowning are employed to increase basic load rating and service life.
Features
- Extreme rolling element design (R-type design)
- Special heat treatment (KE treatment and SH treatment)
- Optimal crowning
- Improved tilt resistance
Applications
- Yaw drive reducers for wind power generation systems
FAQ
- Q. By how much has the basic load rating of bearings for yaw drive reducers been improved?
- A. The basic load rating has been improved by 1.1 to 1.2 times.
- Q. How much can the service life of bearings for yaw drive reducers be extended?
- A. Service life has been improved by more than 2 times.
- Q. What technologies are used to enhance reliability under gust conditions in bearings for yaw drive reducers?
- A. As robustness-enhancing technologies, extreme rolling element design, special heat treatment, and optimal crowning are employed.
- Q. What are the details of the extreme rolling element design and special heat treatment for bearings for yaw drive reducers?
- A. The extreme rolling element design is the R-type design. The special heat treatment is KE treatment and SH treatment.
- Q. What applications are bearings for yaw drive reducers suited for?
- A. They are high-load, high-rigidity tapered roller bearings and needle roller bearings used in yaw drive reducers of wind power generation systems. They contribute to compact design and longer service life.
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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