GB938013A - Improvements in and relating to electric turbine-start control arrangements - Google Patents
Improvements in and relating to electric turbine-start control arrangementsInfo
- Publication number
- GB938013A GB938013A GB13456/60A GB1345660A GB938013A GB 938013 A GB938013 A GB 938013A GB 13456/60 A GB13456/60 A GB 13456/60A GB 1345660 A GB1345660 A GB 1345660A GB 938013 A GB938013 A GB 938013A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- switch
- solenoids
- relay
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/26—Starting; Ignition
- F02C7/268—Starting drives for the rotor, acting directly on the rotor of the gas turbine to be started
- F02C7/275—Mechanical drives
- F02C7/277—Mechanical drives the starter being a separate turbine
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
938,013. Gas turbine plant. GENERAL ELECTRIC CO. April 14, 1960 [April 27, 1959], No. 13456/60. Class 110 (3). A gas turbine type engine starter comprising a control system in which a main switch, when closed, begins a sequence of automatic operations, has a relay which is energized by a combustion chamber pressure responsive switch breaking a short circuit path around the relay containing normally closed contacts of the relay. The arrangement is such that the relay must be reset by opening the main switch before another sequence of operations can be initiated. A gas turbine type starter has a combustion chamber 11 to which fuel and air are supplied from containers 18, 24 through solenoid-operated valves 21, 28, 29. The turbine 12 drives the starter pinion 16 through a reduction gear 17. When switch 44 is closed, current flows through contacts B2, 43 and A3 to solenoids 30, 31 and also through contacts B3 to the solenoid 22 so that a flow of fuel and air is initiated to the combustion chamber 11. Current also flows through the contacts B3, pressure switch arm 37 and contacts A2 to the ignition unit 33. Relay coil A is not energized owing to the low resistance of the by-pass through contacts B2, 43, A3, B3, switch arm 37 and contacts A2. The relay coil B is not energized as contact B1 and switch 47 are open. After a brief interval, combustion occurs in the combustion chamber and the resulting pressure increase causes switch arm to move from contact 40 to contact 41. The shunt path around the relay coil A is now broken at contact 40 so that the coil A is connected in series with the ignition unit 33. The coil actuates the relay to open contacts A2, A3 and close contact A1. The closing of contact A1 locks in the relay coil A and de-energizes the ignition unit 33. The pressure switch 36 is of the snap action kind so as to ensure that the continued energization of the solenoids 22, 30, 31 through contacts B2, 43, arm 37 and contacts B3. The bus-bar 45 is connected now to the air and fuel solenoids through a circuit which at the return of the pressure switch to its low pressure position interrupts the current supply in the fuel and air control solenoids. When a preselected cut-out speed is attained the speed control mechanism 48 opens a switch 43 which breaks the connection between the bus-bar 45 and the air and fuel solenoids 30, 31 and 22, thereby closing the valves 21, 28, 29. This causes a drop in combustion chamber pressure and a return of arm 37 to contact 40. Interruption of combustion causes the speed of the turbine 12 to decrease and switch 43 to re-close. Since the relay coil remains energized, the contacts A2, A3 remain open and contacts A1 remain closed so that the closing of the switch 43 does not re-establish the circuit to the fuel and air solenoids. To re-open a starting sequence, switch 44 must be opened first to interrupt the power supply to the relay coil A to cause resetting of the contacts. If an air motoring form of operation is required, main switch 47 is closed. This energizes coil B and closes contacts B1 and opens contacts B2, B3. The motor 45 is then connected to solenoids 30, 31 so that air only is supplied to the combustion chamber 11. A diode 49 is provided to dissipate energy in the solenoids when the current is interrupted and to reduce arcing at the switch 43.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US808983A US3004387A (en) | 1959-04-27 | 1959-04-27 | Gas turbine starter control system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB938013A true GB938013A (en) | 1963-09-25 |
Family
ID=25200269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13456/60A Expired GB938013A (en) | 1959-04-27 | 1960-04-14 | Improvements in and relating to electric turbine-start control arrangements |
Country Status (2)
Country | Link |
---|---|
US (1) | US3004387A (en) |
GB (1) | GB938013A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2405371A1 (en) * | 1977-10-05 | 1979-05-04 | Teledyne Ind | TURBOMOTOR STARTER |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4777793A (en) * | 1986-04-14 | 1988-10-18 | Allied-Signal Inc. | Emergency power unit |
US4934136A (en) * | 1986-04-14 | 1990-06-19 | Allied-Signal Inc. | Method of operating an emergency power unit |
US4864812A (en) * | 1987-11-13 | 1989-09-12 | Sundstrand Corporation | Combined auxiliary and emergency power unit |
US5003690A (en) * | 1988-09-09 | 1991-04-02 | Anderson Ray C | Finning and thread rolling machine |
US5097658A (en) * | 1989-09-21 | 1992-03-24 | Allied-Signal Inc. | Integrated power unit control apparatus and method |
US5060469A (en) * | 1989-09-21 | 1991-10-29 | Allied-Signal Inc. | Integrated power unit control apparatus and method |
US11807394B1 (en) * | 2020-01-06 | 2023-11-07 | Jonathan Richard Gunn | On-ground helicopter engine starter interrupt system that prevents engine start up when either the throttle is open or the fuel control is engaged (or both) for reciprocating and turbine helicopters |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2742758A (en) * | 1952-12-31 | 1956-04-24 | Bendix Aviat Corp | Starter control system |
US2863283A (en) * | 1955-03-31 | 1958-12-09 | Bendix Aviat Corp | Speed control system for gas turbine engines |
-
1959
- 1959-04-27 US US808983A patent/US3004387A/en not_active Expired - Lifetime
-
1960
- 1960-04-14 GB GB13456/60A patent/GB938013A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2405371A1 (en) * | 1977-10-05 | 1979-05-04 | Teledyne Ind | TURBOMOTOR STARTER |
Also Published As
Publication number | Publication date |
---|---|
US3004387A (en) | 1961-10-17 |
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