Regular maintenance is the key to ensuring a long service life for the reactor bottom pump.
1. Preparation Work
Complete Shutdown: Cut off the power supply and hang warning signs.
Depressurize and Cool Down: Drain the material from the pump and allow the pump body to cool to a safe temperature.
Tool Preparation: Prepare specialized pullers, torque wrenches, and spare parts such as new seals and bearings.
2. Key Disassembly and Inspection Steps
Disassemble the coupling and end cover: Record the relative positions of components.
Inspect core components:Gears and side plates: Measure end face and radial clearances; check for wear and scratches.
Bearings: Check clearance and raceway wear; manually rotate to ensure no jamming or abnormal noise.
Shaft seal: Inspect wear on the sealing faces of the rotating and stationary rings, and check the elasticity of O-rings.
Cleaning: Thoroughly remove all old material and carbon deposits from all parts.
3. Assembly and Testing
Replace all seals, and replace the friction pairs in sets as required by the manual: Assemble precisely in the correct order, ensure the gears are aligned, and tighten the bolts to the specified torque.
Hot test run: Pre-heat, then start with no load. Gradually apply load while monitoring vibration, temperature rise, and leakage. Only put into service once operation is stable.