Base excitation testing system using spring elements to pivotally mount wind turbine blades
US8601878B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2009 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Aug 5, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/728
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system (1100) for fatigue testing wind turbine blades (1102) through forced or resonant excitation of the base (1104) of a blade (1102). The system (1100) includes a test stand (1112) and a restoring spring assembly (1120) mounted on the test stand (1112). The restoring spring assembly (1120) includes a primary spring element (1124) that extends outward from the test stand (1112) to a blade mounting plate (1130) configured to receive a base (1104) of blade (1102). During fatigue testing, a supported base (1104) of a blade (1102) may be pivotally mounted to the test stand (1112) via the restoring spring assembly (1120). The system (1100) may include an excitation input assembly (1140) that is interconnected with the blade mounting plate (1130) to selectively apply flapwise, edgewise, and/or pitch excitation forces. The restoring spring assembly (1120) may include at least one tuning spring member (1127) positioned adjacent to the primary spring element (1124) used to tune the spring constant or stiffness of the primary spring element (1124) in one of the excitation directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.