What are the major components of a typical gas turbine oil lubrication system?
What are the major components of a typical gas turbine oil lubrication system?
The major components of a typical lubrication system are (see Fig. 3.1): An oil tank • An oil pressure pump and supply lines • Scavenge pumps and return lines • Filters and strainers • An oil cooler • A venting system • Sensors for flight deck indication and condition monitoring.
What is lube oil pressure?
Oil pressure is determined by the resistance oil faces when flowing through the oil passages of the engine. To an extent, oil pressure is required for the oil to be able to reach all components of the engine, however if the oil pressure reading is outside of this range, it is usually considered too high or too low.
What are the two types of turbine engine oil systems used today?
Types of lubrication system The lubrication oil is stored outside the gas turbine in a tank 5. A wet-sump lubrication systems is generally used in aviation gas turbine engines. The lubrication oil is stored in the engine cavities proper.
What is the temperature of lube oil in a gas turbine?
Of primary concern is the fact that the lube oil in aero-derivative turbines is in direct contact with metal surfaces ranging from 400ºF to 600ºF (204ºC to 316ºC). Sump lube oil temperatures can range from 160ºF to 250ºF (71ºC to 121ºC). These compact gas turbines utilize the oil to lubricate and to transfer heat back to the lube oil sump.
How is lubrication used in a combined cycle?
In the combined cycle arrangement, there is often only one “shared” lubrication system, so the oil must be able to lubricate both steam and gas turbine bearings. This means that in addition to the qualities mentioned above, the oil must have the ability to remove and shed water.
When do you need a pressurized lube system?
Hydrodynamic lubricated bearings (sleeve bearings) may require a pressurized lube oil system. The pressurized lube oil system is normally designed to supply oil at a suitable pressure to the pump bearings, driver, and any other driven equipment, including gears and continuously lubricated couplings.
How does the lube oil regulator work in a turbine?
The regulator operates the same wayas the lubeoilreliefvalve: when the pump discharge pressure istoohigh, the regulator spills the surplus oil backtothe lube oiltank. Typically, the pres sure setpointofthis regulator is below thatofthe lube oilreliefvalve such that thelatterremains closed.