Thermographic Inspection for Screw Conveyors
Specialized Thermographic Inspection programs for Screw Conveyor Reliability & Maintenance.
Why it matters
Key Benefits
Hot Spot Identification
Infrared thermal imaging identifies abnormal heat patterns across screw conveyors surfaces that indicate developing faults in the screw flight, trough, hanger bearings, end bearings, and drive unit. Temperature anomalies are detected during normal operation without production interruption.
Electrical Connection Integrity
Thermographic surveys of electrical terminations and connections serving screw conveyors identify high-resistance joints before they cause arcing, fires, or protective device trips. This is especially critical for connections carrying full load current.
Thermal Profile Baselining
Establishing thermal baselines for screw conveyors under normal operating conditions enables rapid detection of deviations. Comparative analysis between identical units identifies underperforming equipment and prioritizes maintenance resources.
Context
Challenge & Approach
The Reliability Challenge
Screw conveyor trough surface temperatures are influenced by process material temperature, making it difficult to separate equipment faults from normal thermal patterns on heated or cooled screw conveyors. Hanger bearing locations may be visible as thermal features through the trough wall, but temperature sensitivity depends on trough material thickness and insulation. Material buildup on the trough exterior affects surface emissivity and heat transfer. Drive component temperatures vary with conveyor loading. Cover plate bolting and gasket condition affects heat loss patterns. Screw flight contact with the trough from misalignment or worn hanger bearings creates localized heating that may be subtle on thick-walled troughs.
Our Approach
We image screw conveyor trough surfaces along their full length, with particular attention to hanger bearing locations visible through thermal hot spots on the trough wall. Drive motor, gearbox, and coupling components are imaged per standard rotating equipment thermographic procedures. Inlet and discharge chute areas are checked for material blockage through abnormal temperature patterns. Cover plate sealing effectiveness is assessed through thermal leakage patterns. We correlate trough surface temperatures with known hanger bearing locations from equipment drawings. For heated or cooled screw conveyors, we establish thermal baselines under normal operating conditions. Reports include trough thermal maps with hanger bearing locations marked, drive component assessments, and recommendations for hanger bearing replacement, trough repair, or alignment correction.
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Learn More →Thermographic inspection of screw conveyors identifies abnormal thermal patterns indicating bearing overheating, electrical connection resistance, insulation degradation, and blockages or flow restrictions. Temperature differences between identical components or between operating and baseline conditions highlight developing faults in the screw flight, trough, hanger bearings, end bearings, and drive unit.
Yes, screw conveyors must be operating under normal load conditions during thermographic inspection to generate meaningful thermal signatures. Equipment should be at steady-state operating temperature, typically after at least 30 minutes of operation at normal load. Cold equipment will not reveal the thermal anomalies that indicate developing faults.
Modern infrared cameras provide temperature accuracy of plus or minus 2 degrees Celsius or 2 percent of reading. Emissivity corrections, reflected temperature compensation, and proper measurement distance are critical for accurate readings on screw conveyors surfaces. Polished or reflective metal surfaces require emissivity tape or coating for reliable measurements.
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Inspect Screw Conveyors Without Opening Them
Our thermal imaging detects hanger bearing overheating and trough contact through the conveyor housing during normal operation.
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