Transmission containing helical gearing and bearing arrangement therefor
US7410442B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2004 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Jun 12, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19098
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A transmission for a wind turbine includes a housing (20) in which two shafts (26, 28) rotate, each being supported on a locating bearing (50, 60) which transmits thrust loads to the housing as well as radial loads and on a nonlocating bearing (48, 58) which transmits only radial loads to the housing. The shafts carry helical gears (52, 52, 62) which induce thrust loads in the shafts when the shafts transmit torque. The locating bearings are unitized single row tapered roller bearings which are oriented to transmit thrust loads in the primary direction through their raceways (132, 138) and in the secondary direction through ribs (134, 144) at the ends of their rollers (146). The nonlocating bearings take the form of a single row cylindrical roller bearings which accommodate differential thermal expansion and contraction between the shafts and housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.