Dump control for turbine engine gate valve actuator
US4232514A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1979 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Jun 20, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02C9/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A gas turbine engine has a power turbine driven by gas flow across a nozzle arrangement that includes a partial admission gate valve therein that is movable into and out of overlying relationship with a limited number of vanes of the nozzle in order to control power output therefrom during part load operation of the engine. The gates are operated by a quick response pneumatic operator including an inlet to pressurizable control chamber having a movable control diaphragm therein with a valve element thereon movable into a closure relationship with a valve seat defining a dump opening in the valve and wherein a regulated source of pressure is applied against the movable diaphragm to hold it closed during a low power, road load mode of engine operation; an orifice in the valve element restricts flow into a pressurizable chamber formed in part by a movable power diaphragm to cause a controlled buildup of pressure therein and a slow velocity extension of the operator to position the gate in its part power position and wherein means are included to produce a slow rate retraction to avoid excess turbine temperatures and wherein dump means disconnect the regulated pressure from the operato…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.