Active bypass flow control for a seal in a gas turbine engine
US9593590B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2014 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Jun 6, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2270/58
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An active bypass flow control system for controlling bypass compressed air based upon leakage flow of compressed air flowing past an outer balance seal between a stator and rotor of a first stage of a gas turbine in a gas turbine engine is disclosed. The active bypass flow control system is an adjustable system in which one or more metering devices may be used to control the flow of bypass compressed air as the flow of compressed air past the outer balance seal changes over time as the outer balance seal between the rim cavity and the cooling cavity wears In at least one embodiment, the metering device may include an annular ring having at least one metering orifice extending therethrough, whereby alignment of the metering orifice with the outlet may be adjustable to change a cross-sectional area of an opening of aligned portions of the outlet and the metering orifice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.