Apparatus and method for monitoring steam turbine shroud clearance
US4876505A · kind A · utility
32Cited by
11References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 1988 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | May 27, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D21/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A turbine blade shroud clearance monitoring system is comprised of a plurality of sensors for measuring the clearance between the stationary portion of the turbine and the shroud segments in each turbine blade row. The measurements are averaged by a microprocessor to produce an average clearance value for each shroud segment. The microprocessor then analyzes the average clearance values for each shroud segment to determine when the clearance between a shroud segment and the stationary portion of the turbine is approaching a critical value. Output responsive to the foregoing analysis is then generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.