Double screws compost turning machines operate in high-temperature, high-humidity, and highly corrosive fermentation environments for extended periods. Wear and tear primarily occur in critical transmission components such as the spiral blades, bearings, and chains. The following signs indicate that the equipment is in a "sub-healthy" state and requires immediate inspection and maintenance:

I. Spiral Blades (Most Obvious Wear)

• Blade thinning: The edges of the blades are worn thin by the material, even showing notches or curling, leading to reduced composting efficiency.

• Blade deformation: The blades bend due to high temperatures or impact from hard objects, causing the composting trajectory to deviate and easily scraping the tank wall.

• Coating peeling: If the blades have an anti-corrosion coating, large-area peeling or rust indicates increased corrosion risk.

II. Bearings and Seals (Hidden Dangers at High Temperatures)

• Abnormal noise and overheating: During operation, the bearings emit a "clicking" sound or the temperature rises abnormally, indicating lubrication failure or ball bearing wear.

• Oil leakage/water seepage: Aging seals lead to lubricating oil leakage, or fermentation liquid seeps into the bearing cavity, accelerating bearing corrosion.

III. Chains and Transmission (Power Attenuation)

• Chain slack: The chain stretches and lengthens, causing transmission vibration or tooth skipping, affecting composting stability.

• Gear wear: The tips of the drive gear teeth are worn flat, increasing the meshing clearance and reducing transmission efficiency.

IV. Tank and Support Structure (Structural Fatigue)

• Tank wall scratches: Improper clearance between the spiral blades and the tank wall leads to deep scratches on the tank wall, or even wear and perforation of the steel plate.

• Support structure loosening: Long-term vibration causes loosening of connecting bolts or cracking of support welds, affecting the overall stability of the fertilizer production machine.