What should be paid attention to when cleaning rotor blades by sandblasting?

Matters needing attention when cleaning rotor blades:

Sand grains must be screened. The pressure of compressed air is 0.4 ~ 0.6 MPa. Pay attention to personal safety protection when sandblasting. be filled/suffused/brimming with

The spray gun keeps a considerable distance from the blade to prevent the blade from denting. In addition, the impeller and shaft must be covered with adhesive tape.

The gap between envelopes is wrapped. Wrap the journal, thrust plate and emergency protector with cloth. Prevent sand from getting stuck in the joints.

Clearance leads to rotor mass imbalance and other problems.