Ultrasonic Testing for Belt Conveyors
Specialized Ultrasonic Testing programs for Belt Conveyor Reliability & Maintenance.
Why it matters
Key Benefits
Leak Detection
Airborne ultrasonic detection identifies pressure and vacuum leaks in belt conveyors systems that are inaudible to the human ear. Locating leaks quickly reduces energy waste and prevents process quality problems.
Bearing Lubrication Optimization
Ultrasonic monitoring of belt conveyors bearings provides real-time feedback during grease application to prevent both under-lubrication and over-lubrication. Proper lubrication extends bearing life and reduces friction-related energy losses.
Early-Stage Fault Detection
Contact ultrasonic measurements on belt conveyors detect high-frequency stress waves generated by metal-to-metal contact, friction, and impacts in the belt, idlers, pulleys, drive motor, gearbox, and take-up system. These signals appear weeks before vibration amplitude increases detectably.
Context
Challenge & Approach
The Reliability Challenge
Conveyor idler bearings number in the hundreds per conveyor and are often in difficult-access locations, making rapid screening essential. Belt noise from material impact and belt-to-idler contact creates ultrasonic background that varies along the conveyor length. Idler bearing speeds vary with belt speed and idler diameter, affecting baseline ultrasonic levels. Sealed idler bearings prevent relubrication, so ultrasonic screening is primarily a pass/fail assessment for replacement planning. Conveyor pneumatic control systems (brakes, tensioners, take-up cylinders) develop air leaks at fittings, actuators, and hose connections. Environmental noise from material handling and adjacent equipment can reduce detection sensitivity. Rain and wind generate ultrasonic noise on outdoor conveyors.
Our Approach
We walk conveyor lengths with contact or close-range ultrasonic instruments, screening each idler roll for elevated acoustic emission. Bearings exceeding alarm thresholds are tagged with location references (stringer number, carry/return side) for replacement scheduling. Screening rates of 200+ idlers per hour allow complete conveyor surveys in reasonable timeframes. Drive component bearings (motors, gearboxes, pulleys) receive detailed ultrasonic assessment with dBu trending. Pneumatic system components including brake actuators, tensioning cylinders, and control valves are scanned for air leaks using airborne ultrasonic methods. Leak locations are tagged and severity-rated. Reports include idler replacement priority lists sorted by location and severity, drive component bearing assessments, and pneumatic system leak maps.
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Learn More →Ultrasonic testing detects bearing faults, lubrication deficiencies, internal leakage, and electrical discharge in belt conveyors. Airborne ultrasonic detection locates pressure and vacuum leaks at joints, seals, and connections. Contact ultrasonic measurements identify early-stage metal fatigue and friction before vibration levels increase measurably.
Ultrasonic testing detects high-frequency stress waves that appear earlier in the fault progression than vibration amplitude increases in belt conveyors. It is most sensitive to friction, impact, and turbulent flow, while vibration analysis excels at identifying specific fault types through frequency patterns. The two technologies are complementary rather than interchangeable for monitoring belt conveyors.
Ultrasonic testing is effective on rotating and reciprocating components, pressure boundaries, and electrical systems associated with belt conveyors. It is particularly valuable for slow-speed equipment where vibration signals are too weak for reliable analysis. Access to measurement points and background ultrasonic noise levels are the main factors that determine measurement quality.
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Tell us about your equipment and facility. Our reliability team will review your situation and recommend a tailored reliability program — no obligation.
Screen Hundreds of Idlers in Hours, Not Days
Our ultrasonic idler screening programs identify failing bearings at 200+ rolls per hour and deliver location-mapped replacement lists.
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