Arrangement for internal passive turbine blade tip clearance control in a high pressure turbine
US7588414B2 · kind B2 · utility
8Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2006 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | May 11, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D9/041
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A passive internal control system for rotor blade tip clearance of a high-pressure turbine is based on inner rings that expand in a radial direction under the influence of heat and radially adjust the clearance delimited by liner segments (9) on the casing side. It comprises a radially expandable U-shaped downstream inner ring (10) mounted to inner platforms (7b) of guide vanes (7) on a side where the rotor does not have a static bearing, said ring providing expansion compensation in the axial and peripheral directions and forming a torsion box (8) with struts (13, 14) that absorbs rolling and tilting moments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.