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Views: 310 Author: LENOTANK Publish Time: 2025-09-14 Origin: Site
Complete Operating & Maintenance Manual for Split-Type Mill: A Step-by-Step Guide
Follow this comprehensive guide to ensure the safe, efficient, and long-lasting operation of your split-type mill. Adhering to these procedures is essential for optimal performance and preventing premature wear or failure.
1. Pre-Operation Inspection & Lubrication
Mechanical Check: Before starting, inspect all pipelines and connections for tightness. Manually rotate the pump shaft to confirm it turns freely without binding or scraping noises.
Bearing Lubrication: Ensure the bearing housing is filled with the correct grade of oil to the marked level on the sight glass. Refer to the lubrication schedule below.
2. Pump Priming & Startup Preparation
Priming (Critical Step): Remove the inlet plug and completely fill the pump casing with water or the process slurry. This prevents dry running, which can cause severe damage.
Valve Positioning: Before activating the motor, ensure the main outlet gate valve is closed. Close the valves for the outlet pressure gauge and inlet vacuum gauge.
3. Startup & Initial Operation Sequence
Direction Check: Briefly start (jog) the motor to verify the rotation direction matches the arrow on the pump casing. Incorrect rotation will severely reduce performance.
Safe Startup: Start the motor. Once it runs smoothly at full speed, open the outlet pressure and inlet vacuum gauge valves.
Gradual Loading: Slowly open the outlet gate valve while monitoring the motor amperage to prevent overload. Adjust the valve to reach the desired operating point.
4. Operational Monitoring & Key Parameters
Performance Range: Operate within the flow and head range specified on the pump nameplate for best efficiency and reliability.
Bearing Temperature: Monitor continuously. Allowable temperature rise is 35°C above ambient, with a maximum absolute temperature of 80°C.
Vibration & Noise: The mill should run smoothly. Stop immediately if unusual vibrations or noises occur and investigate the cause.
5. Correct Shutdown Procedure
Orderly Shutdown: First, gradually close the outlet gate valve. Then, close the pressure and vacuum gauge valves. Finally, turn off the motor power.
6. Maintenance Schedule & Key Tasks
Oil Change Schedule:
First month of operation: Change lubricating oil every 100 hours.
Thereafter: Change oil every 500 hours (or as specified in the manual).
Packing Gland Adjustment: Periodically adjust the gland to allow a slight, controlled leak (approximately 30-60 drops per minute) for lubrication and cooling.
Shaft Sleeve Inspection: Check for wear during routine maintenance. Replace if scoring or excessive wear is evident.
Winter Shutdown: After use in freezing conditions, completely drain all liquid from the pump and piping to prevent cracking.
Long-Term Storage: For extended storage, disassemble, clean, apply protective grease to all machined surfaces, and reassemble before storing in a dry place.
