Maintenance Activities for Gas Turbines Solar Centaur 40

gas turbine

Preventive Maintenance Activities for Solar Centaur 40

Centaur 40 Maintenance Activities
Gas Turbine reliability

Preventive maintenance and checking of the gas turbine engine and control equipment are required at established intervals. A check of servicing needs under operating conditions by Mechanical or Electrical Field Service will establish the most practical inspection and maintenance schedules to minimize economic losses for corrective maintenance.

PRECAUTIONS DURING MAINTENANCE ACTIVITIES

When servicing the Turbocompressor or Generator packages, open cap lines and plug accessory parts to avoid entry of foreign materials.

For marking on stainless steel is necessary a grease pencil. Never mark with lead pencils on it. Graphite particles carburize stainless steel at the high temperatures of gas turbine operation.

Do not use an anti-seize thread compound containing zinc; do not score stainless steel surface with a zinc-alloyed metal. Prevent the deposit of zinc in any form on stainless steel; corrosion will result at high temperatures.

Please do not clean and reuse any o -rings or gaskets. Use proper care when installing new o -rings. Never slide or roll o -rings over threaded surfaces. Do not stretch or pinch excessively. Coat all new o - rings with  Vaseline before installation.

Keep hardware and small parts together in trays to prevent loss. Lubricate and wrap plastic film or other material and place it in protective containers. During maintenance activities, When handling and replacing subassemblies and parts, provide sufficient receptacles and proper covering to protect shafts, studs, grooved surfaces and other projecting items from being dented, bent, scratched or otherwise damaged.

Table of Content
  1. DAILY INSPECTION
    1. (Maintenance Activities)
    2.  MONTHLY SERVICE (maintenance Activities)

DAILY INSPECTION

(Maintenance Activities)

On unattended, continuous operation, or remotely operated installations, inspection procedures will not be carried out daily. But it is recommended that they be done as often as practicable.

Maintenance Activities before starting

CAUTION

When replenishing oil, the tank mustn't be overfilled. An overfull oil tank results in oil blowing out of the oil tank vents and improper scavenging of oil in the gravity drain system.

  1. Check the tank on a level on gauge, and if the oil level is low, fill to the full mark with the oil specified. DO NOT FILL THE TANK ABOVE THE FULL MARK ON THE GAUGE. (Immediately after engine shutdown, the oil level will be slightly lower until the oil in the lubrication scavenges lines is drained into the oil tank).
    Check for adequate fuel supply pressure.
  2.  Cheek for oil or fuel Leakage around the engine; determine and eliminate the cause of any Leakage.
  3. Visually check the security of nuts, bolts, and other fasteners. If any lock wire is broken, determine the cause, tighten the nuts or bolts and install new stainless steel lock wire. Do not use zinc-coated (galvanized) lock wire.
  4. Check for adequate fuel supply pressure.
  5. Check for oil or fuel Leakage around the engine; determine and eliminate the cause of any Leakage.
  6.  Visually check the security of nuts, bolts, and other fasteners. If any lock wire is broken, determine the cause, tighten the nuts or bolts and install new stainless steel lock wire. Do not use zinc-coated (galvanized) lock wire.
  7. Check electrical connections for tightness, corrosion, and condition of the insulation. Replace wires having oil-soaked or damaged insulation. Correct any conditions which may cause Insulation damage.
  8. Ensure that the air inlet ducting is clear, and remove any dust, ice, or other foreign material obstructing the engine and oil cooler air intakes.
  9. Ensure that the exhaust system is un- obstructed and that no flammable material is close to any part of the duct.
  10. Check the oil level of auxiliary and starter motor lubricators no later than after three start/stop cycles. Necessary through filler plug in the top of lubricator housing.)
  11. Inspect drive couplings of auxiliary lube oil and seal oil pump motors for excessive backlash and wear.
  12. Remove corrosion from battery terminals. Do not overfill cells.
  13. Verify the battery charger's condition.
  14. Check the oil level regulator for the correct level.
  15. Inspect all lines and hoses for leaks, wear, or chafing; replace or secure as required.
  16. Inspect all external mechanical linkages for excessive wear and looseness. 
  17. Visually verify that all station piping arrangements are secure to loads which could cause gas leaks and interfere with equipment alignment.
    Maintenance Activities During Operation
  • Watch for conditions requiring the replacement of any filter element by observing oil filter differential pressure indicator buttons. Verify readings are not normal.
  • Inspect all gauges and indicators for proper equipment operation.
  • Verify auxiliary and starter motor lubricators for adequate oil now. Normal delivery is about 80 average drops per min at 2000 rpm gas motor speed. If necessary, adjust the screw on top of the lubricators.
  • Check the oil tank level every 24 hours for long periods of continuous operation. Check the oil level regulator and record the slow-flow meter reading to determine any unusual oil consumption.

Pay special attention to the following:

  • Running vibration and noise, or any other unusual operating conditions
  • Changes in accelerating time when starting.
  • The amount of service work required during a scheduled inspection. Any Increase in engine temperature.
  • When Gas Turbines are exposed to concentrations of salt or chemical fumes, operate the water wash system daily or as often as possible.

 MONTHLY SERVICE (maintenance Activities)

The battery charger (when used) should be serviced monthly as follows: Move the battery charger equalizing switch to HIGH for 8 to 24 hours. 'Phis action gives an equalizing charge to the batteries, thus ensuring satisfactory battery operation. Experience may require the battery charger equalizing switch to be activated more or less frequently. Do not leave the switch on the HIGH position for a prolonged period.

EXTENDED OPERATION SERVICE AND INSPECTION Maintenance Activities

Every 4000 hours after that, perform the following Maintenance Activities in addition to the daily inspection items.

1. Replace lubricating and other oil filter elements. Check a sample of the lubricating oil for contamination and, if required, drain and refill the oil tank with oil specified in Section.

2. Lubricate the grease fitting on the seal oil pump.

3. Check the speed of auxiliary drive motors using a portable tachometer or a strobe light. Verify system oil pressures, and set motor speeds using the manual flow control valve located upstream from each auxiliary pump motor lubricator.

4. Remove and inspect the orifice filter in the fuel control valve. Clean or replace the filter as necessary.

5. Remove and inspect the compressor bleed air valve and clean it as necessary.

6. Remove and inspect the igniter plug. Clean and set the gap at 0.09  inch +/- 0.01 or replace it as necessary.

8. Remove and inspect fuel injectors. Clean or replace as necessary.

9. While fuel injectors are removed, use a borescope to inspect the combustor liner dome and inner and outer walls for cracks or other deterioration. Inspect and evaluate the first-stage turbine nozzle for evidence of erosion, cracks, or other damage.

10. Check the oil cooler for the accumulation of dirt, grime, or other foreign material that could obstruct the cooling flow. Clean as necessary.

11. Check the air filters at regular intervals, depending upon environmental conditions at the installation site, such as dust concentrations in the atmosphere.

12. Verify engine performance, PCD, and temperature values, and clean the engine axial compressor.

13. Check engine light off and acceleration characteristics against baseline times for evidence of degradation. Observe throttle valve linkage actuation for smoothness and proper sequencing.

14. Watch the fuel actuator idle and high-speed stops by monitoring the GP speed meter and compare it with baseline values.

15. Verify the variable vane control system's mechanical integrity and servo performance.

16.   Verify the proper functioning of the speed and temperature topping subsystems by monitoring the power turbine speed meter and engine temperature meter.

 

If you want to know other articles similar to Maintenance Activities for Gas Turbines Solar Centaur 40 you can visit the category Case Studies.

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