Success Story > Repair simple cartridge shaft 180
Repair simple cartridge shaft 180
Sector: Petrochemical and energyInitial state
Operations performed
- Cleaning of original flange.
- Manufacture of new sleeve.
- Manufacture of the estelited seat part.
- Manufacture of graphite rotating part.
- New fastening screws for the shaft DIN916 *
- Static sealing test with air at 2.5 bar/ 10 min.
* Customer eliminates the attachment through welding or shrivelling in the area where DIN916 screws are fastened.
Application
ELECTRICITY GENERATING TURBINE
- Product: River water
- Pressure: 1-1.5 bar
- Speed: 375 rpm
Diagnosis
Work in dry condition. Contact surfaces and elastomers are damaged. Screws used to fasten the shaft did not fulfil their task, thus allowing the cartridge to have axial movement and graze other parts. Hardness of the shaft was 257 HB (through welding), instead of the recommended 237 HB.
Result
