Linear actuator for a bleed valve
US5216877A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 1992 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Jan 31, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D27/0223
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a control system for a turbine engine having a variable geometry air compressor, a valve arrangement responsive to a first operational pressure differential created between a discharge fluid pressure produced by the air compressor and an environmental fluid pressure for controlling the communication of a first fluid pressure to an actuator assembly which responds to a second operational pressure differential created across a piston between the first fluid pressure and a second fluid pressure produced through a modification of the discharge fluid pressure. The second fluid pressure being developed by compressor discharge fluid pressure flowing from a blind bore in a shaft through a variable opening to one side if the piston while at the same time fluid pressure flows through a restriction to the surrounding environment. The resulting second pressure differential acts on the piston to provide the shaft with a force which is communicated through linkage to linearly change the shape of a variable area geometry device of the air compressor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.