1. Regular Cleaning
Purpose: Remove residual materials on the blades to prevent material accumulation from affecting mixing efficiency, causing corrosion, or leading to abnormal wear of the blades.
Methods:
After each mixing operation, turn off the power and use a soft brush or non-metallic tool (to avoid scratching the blade surface) to gently scrape off the attached materials.
For stubborn residues, use a cleaning agent suitable for the mixer's material (such as a neutral detergent solution) for scrubbing, and then rinse with clean water and dry thoroughly.
Avoid using high-pressure water jets directly on electrical components or seals during cleaning.
2. Visual Inspection and Wear Detection
Frequency: Conduct a detailed inspection at least once a week or after every 50-100 operating hours (adjusted appropriately based on usage intensity).
Key Inspection Points:
Surface Wear: Check for blade edge thinning, pitting, cracks, or deformation. If the wear depth exceeds 10% of the blade thickness (or the value specified by the manufacturer), timely maintenance or replacement is required.
Fastening Status: Inspect whether the blade mounting bolts/nuts are loose, damaged, or corroded. Tighten loose fasteners and replace damaged ones immediately to prevent blade detachment.
Clearance Changes: Measure the gap between the blades and the mixer tank or between the two shafts. If the gap exceeds the specified range (e.g., manufacturer-recommended clearance tolerance), adjust or replace the blades to ensure mixing uniformity.
3. Lubrication of Moving Parts
Purpose: Reduce friction between the blade shafts and bearings, slow down wear, and extend component life.
Methods:
According to the mixer's manual, regularly lubricate the bearings and seals at both ends of the blade shaft. Common lubricants include lithium-based grease or synthetic lubricants (select based on the operating temperature and environment).
When lubricating, clean old grease and debris first, then apply new grease to ensure full contact between the bearings and lubricant.
Avoid over-lubrication to prevent grease from leaking into the mixing chamber and contaminating materials.
4. Blade Adjustment and Alignment
Causes of Misalignment: Long-term use may cause blade position shifts or shaft deflection due to vibration or material impact.
Adjustment Methods:
Use a dial indicator or ruler to check the blade's runout and parallelism. If the blades are skewed or the gap between the two shafts is uneven, adjust the mounting position or replace worn shaft supports.
For adjustable blades (e.g., with angle-adjustable structures), readjust the blade angle according to the mixing process requirements to optimize mixing effects.
5. Replacement of Worn Blades
Replacement Criteria:
When the blade wear reaches the manufacturer's specified limit (e.g., thickness reduced by 20% or severe surface damage).
When cracks or breakages occur that cannot be repaired, or when blade performance (e.g., mixing efficiency) significantly declines.
Notes on Replacement:
Use original or certified replacement blades to ensure compatibility with the mixer model.
During replacement, shut down the power supply and lock the control switch to ensure construction safety.
After installation, manually rotate the shaft to check for abnormal noise or jamming, and re-measure the blade clearance and shaft alignment.
6. Corrosion Prevention and Protection
Suitable for Corrosive Environments: If the mixer processes corrosive materials (e.g., acidic/alkaline substances), take the following measures:
Select blades made of corrosion-resistant materials (such as stainless steel, hardened alloy, or coated with wear-resistant coatings like tungsten carbide).
After each use, thoroughly clean residual corrosive materials and dry the blades to prevent chemical corrosion.
Regularly inspect the blade surface for coating peeling or corrosion spots, and repair or replace them in a timely manner.
7. Record-Keeping and Regular Maintenance Plans
Establish a maintenance log to record blade inspection dates, wear conditions, lubrication/replacement details, and any faults found and resolved.
Develop a annual maintenance plan based on the mixer's usage frequency and working conditions, and entrust professional technicians to conduct comprehensive inspections every 6-12 months (e.g., checking the overall wear of the blades, shaft balance, and drive system).
8. Operational Precautions to Reduce Blade Wear
Avoid overloading the mixer (exceeding the specified mixing capacity) to prevent excessive stress on the blades.
For materials containing hard particles (e.g., sand, metal debris), install a pre-screening device to remove large particles and reduce blade abrasion.
Start and stop the mixer according to the specified sequence to avoid sudden impacts on the blades caused by abrupt starts or stops.