Lubrication and Governing System ENV-116G Turbine 1

1. General

• The lube oil system for turbine and reduction gear. Lube oil is sucked up from the oil reservoir by the main oil pump or aux. Oil pump and supplied to the pinion bearing, gear bearing and gear teeth surface through the stariner and oil cooler, and the it returns to the oil reservoir.
• The bearing oil pressure is regulated by oil relief valve, and excess oil returns to the oil reservoir.

2.  Speed Governor

• The rotational speed of this turbine is controlled by the Wood Ward governor.
• This governor is driven by the drive gearounted on the front end of the main oil shaft.
• It ensures an exellent speed controlling, enabling to keep always constant the rotational speed of the turbine regardless  of variation of load and steam conditions.
• The speed setting point can be significantly changed by turning the speed setting dial with hand the remote control motor.

3. Main Oil Pump and Governor Drive Gear

• The main oil pump is driven at properly reduced or increased speed by the drive gear (drive) mounted on the upper end of the gear shaft and the drive gear (follow) fitted to the gear (drive).
• A governor driving gear (drive) is mounted on one end of the pump gear.
• This gear drives the governor through the gear (follow).
• A tachometer transmitter is provided at the upper end of the pump gear (follow).

4. Auxiliary Oil Pump

• This turbine equipped with auxiliary oil to furnish bearing lubrication during starting and shut down periods.
• The until has one motor-operated pump which providess auto-start and stop by means of a pressure switch.

5. Oil Relief Valve

• The oil relief valves is mounted on the bed plate. Usually, it serves to keep constant the bearing oil pressure and gear spray oil pressure.
• The optimum oil pressure during operation is 0.7 ~ 1.5 kg/cm2 G.
• The oil pressure is regulated by the compression force of the spring.
• It is recommended to set it to obtain 1.5kg/cm2 G at the optimum oil temperature (30~50^0 C at cooler outlet) with the turbine's specified rotational speed.

To be Continued: 
Lubrication and Governing System ENV-116G Turbine 12