ASSEMBLING ACTIVITIES
Day 4
a. ASSEMBLY OF TURBINE COMPONENTS IN THE TURBINE PIT
- Replaced the bush assembly with a new self-lubricating bush.
- Using a thread tap, cleaned the chips stuck to the threads of various turbine parts.
- Installed the guide vane bush into the turbine’s head cover and labeled it for easy assembly of the bushes inside.
- Covered the turbine pit with a head cover.
- Guide vanes assembled with guide vane bush assembly
- To make fitting the guiding vane arms easier, used a mountain grinder to smooth the surface.
- Attached the guide vane arms
- For easier assembly, numbered the guide vane arms and plate.
- Using a thread tap, cleaned the threads of the guiding vane arms.
Day 5:
a. ASSEMBLY OF TURBINE COMPONENTS IN THE TURBINE PIT
- Using a magnetic drilling machine, drilled holes for split pins in the furnished guide vane arms.
- Assembled the shaft with the unit’s runner.
- Using a hydraulic bolt tensioner, assembled the connection bolts between the runner and the shaft.
- Using a welding machine, tagged the coupler bolt.
- Attached the assembly to the coupling bolt housing.
- Attached the shaft sleeve to the turbine shaft.
- Removed the head cover from the pit after numbering the guide vanes components to make assembly easier.
- Using an EOT crane, placed the shaft and runner in the hole.
- Installed the turbine section’s head cover along with guide vane bush.
- Tightened the head cover of turbine with the stud.
- Attached turbine guide bearing housing to head cover and placed bearing top cover, oil tank and shaft seal cover in turbine pit.
- Assembled the guide vane arms to the guide vanes.
b. LOWER GUIDE BEARING AND GENERATOR SECTION
- Assembled the lower guide bearing platforms and its base.
- Assembled base of lower guide bearing oil tank.
Reference Image:
Image: Overhauling Runner along with Main Shaft
