Pump shaft online repair
Thread Content
The high-pressure ammonia pump rotor was strained when disassembling the mechanical seal. How to repair it online? Which metal repair agent is more effective? Is cold welding technology feasible? How to deal with roundness? Everyone is welcome to contribute ideas and suggestions.
If you do not want to dismantle the shaft, it is recommended to repair it manually after cold welding (only a good fitter can do this).
It is best to use stainless steel for repair welding and then polish it. It is best to require a smooth finish (fine sandpaper is used for polishing, the finer the better). There should be an appropriate interval during repair welding to prevent overheating and deformation of the weldment due to excessive welding time.
For scars like yours, we need to repair the welding first, and then polish and repair it afterward.
It's best to weld a little and sand it a little
Can post-weld grinding ensure roundness and cylindricity?
First trim off the burrs with a file, polish with 2000-grit sandpaper, and then apply repair sealant 101AB glue. After drying for half an hour, polish with 800-grit sandpaper, then polish with 2000-grit sandpaper. Apply sealant to the O-ring during installation, and it will basically not leak.
The mechanical seal and the shaft's effective sealing parts can be repaired by cold welding without repairing them all. Just manually grind after cold welding.