Function description

Controlling Component Temperature: Keep critical parts (e.g., roller shafts, bearings, motor windings) within their safe operating range (typically ≤ 150°C for bearings, ≤ 80°C for motors).

Preventing Thermal Deformation: Avoid warping or cracking of rollers (e.g., steel rollers) caused by uneven heating, which would lead to product deviation or surface scratches.

Minimizing Energy Waste: Optimize cooling efficiency to avoid excessive water/air consumption while meeting heat dissipation needs.

Avoiding Secondary Risks: Prevent issues like water splashing on hot products (which could cause quenching and brittleness) or air turbulence that disrupts product stability.

common types of cooling systems (classified by medium)

1.Water cooling system (most efficient for high heat)
A. Roller Internal Circulation Cooling
This is the standard cooling method for heat-resistant roller conveyors (the most common type in finish rolling areas).

B. Spray Cooling (Auxiliary for High Heat Loads)

2.Air Cooling Systems (Low Risk, Simple Maintenance)
A. Forced Air Cooling for Rollers
B. Motor & Reducer Air Cooling

3. Hybrid Cooling Systems (Extreme Conditions)

Common Troubleshooting for Cooling Systems

Symptom	Possible Cause	Solution
Roller overheating	1. Clogged internal coolant channel; 2. Faulty rotary joint (no water flow)	1. Flush the channel with high-pressure water; 2. Replace the rotary joint.
Bearing overheating	1. Air fan failure; 2. Coolant leakage into bearings	1. Repair/replace the fan; 2. Replace the bearing and fix the leak.
Scale buildup on rollers	Hard water (no softening treatment)	1. Add a water softener; 2. Descale rollers with acid-based cleaners.
Water splashing on product	Spray nozzle misalignment; high spray pressure	1. Realign nozzles to target rollers, not products; 2. Reduce pressure to 0.1 MPa.

air cooling system technical parameters

Parameter	Specification	Test Method
Heat Dissipation Capacity	≥ 15 kW per bearing group	Measure bearing temperature (target: ≤ 120 °C)
Airflow Rate	800–1200 m³/h per fan	Tested via anemometer at fan outlet
Static Pressure	200–300 Pa	Ensures airflow reaches bearings through ducting
Air Inlet Temperature	≤ 45 °C	Uses ambient air (filtered to remove dust)

Routine Maintenance

Regular upkeep extends system life and ensures performance:

1.Filter Cleaning/Replacement: Clean air filters (100 μm precision) every 2 weeks to remove mill dust . Replace polyester fiber filters quarterly or if airflow drops by 20% (tested via anemometer).

2.Fan & Duct Maintenance: Inspect fan impellers monthly for dust accumulation-use compressed air to clean blades. Check galvanized steel ducts for corrosion or leaks; repair seams promptly .

3.Lubrication: Reapply high-temperature grease to fan motors every 3 months. Avoid over-lubrication, which can trap heat and damage bearings.

4.Seasonal Overhaul: Before hot seasons, perform a full system test: verify fan speed, sensor responsiveness, and emergency shutdown functions. In cold climates, drain condensation from ducts to prevent freezing .

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