Power plants – Combustion products used as motive fluid – With safety device
Patent
1992-08-17
1994-05-31
Bertsch, Richard A.
Power plants
Combustion products used as motive fluid
With safety device
60 39142, F02G 300
Patent
active
053158172
ABSTRACT:
A method and control system for modulating a starter turbine (14) speed to a predetermined reference speed to prevent crash engagement with a turbine engine (16) during restart. The turbine engine (16) is coupled to the starter turbine (14) by a ratchet and pawl clutch (17), and crash engagement is prevented by modulating the starter turbine (14) speed to the predetermined reference speed, which is below a minimum pawl engagement speed, until the pawls have locked-in. A control system (10) in accordance with the present invention includes an electronic control (18) section and a mechanical pneumatic actuation means (20) which operate to limit the speed of the starter turbine (14) to the predetermined reference speed which is below the minimum speed at which crash engagements occur. The electronic control (18) provides an adjustment signal (26) corresponding to the difference between a sensed starter turbine speed signal (24) and a reference speed signal (49). The mechanical pneumatic actuation means (20) modulates an air flow into the starter turbine (14 ) in response the adjustment signal (26), thereby modulating the speed of the starter turbine (14) to the predetermined reference speed.
REFERENCES:
patent: 3727733 (1973-04-01), Mrazek
patent: 4702273 (1987-10-01), Allen et al.
patent: 4926631 (1990-05-01), Sorenson
patent: 5127220 (1992-07-01), Jesrai et al.
Kos Joseph
Neville James E.
Shangraw Robert D.
Vannini Robert M.
Bertsch Richard A.
Habelt William W.
United Technologies Corporation
Wicker W. J.
LandOfFree
Control system for preventing crash engagement of a ratchet and 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 system for preventing crash engagement of a ratchet and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system for preventing crash engagement of a ratchet and will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1620228