Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1987-11-18
1989-02-21
Nilson, Robert G.
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
92 30, 251 3005, 251 58, 251 64, F16K 31363
Patent
active
048058734
ABSTRACT:
The spindle of a butterfly valve for controlling the supply of compressed air to the starter of a turbine aero-engine is rotated to open and close the valve by the linear movement of a slide in a cylinder in response to the pressure differential between a pair of chambers defined by the slide and the cylinder. A resilient mechanism is provided for holding the slide when the valve is closed and temporarily preventing movement of the slide to open the valve until a predetermined minimum pressure difference exists between the two chambers. The slide is then released and travels initially at high speed and then at a speed limited by a throttle venting the lower pressure chamber to atmosphere. This makes it possible to create a relatively high rate of increase in the pressure of air supplied to the starter at the commencement of opening of the butterfly valve while controlling the final rate of pressure rise. The device can thus be used equally with an inertia starter or a free wheel starter.
REFERENCES:
patent: 2873577 (1955-05-01), Kenney et al.
patent: 3452961 (1969-07-01), Forsman
patent: 4412671 (1983-11-01), Tiefenthaler
Nilson Robert G.
Societe Nationale D'Etude et de Construction De Moteurs D'Aviati
LandOfFree
Control device for a starter valve of a turbine aero-engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control device for a starter valve of a turbine aero-engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control device for a starter valve of a turbine aero-engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1517319