Description
Bently 3500 70M
Technical Specifications
- Model Number: 3500/70M
- Module Type: Impact / Piston Rod Drop Monitor
- Input Type: High-frequency Accelerometers
Key Features
- Impact Energy Measurement: Quantifies the severity of mechanical impacts rather than just measuring amplitude.
- Piston Rod Drop Detection: Monitors the vertical drop of the piston rod to detect crosshead wear and rider band failure.
- Cylinder Performance Analysis: Can be integrated with pressure transducers to calculate compression ratios and valve health.
Application Scenarios
Mandatory for large, critical reciprocating compressors in natural gas transmission, petrochemical plants, and refrigeration facilities to prevent catastrophic mechanical breakdowns.
Performance Parameters
- Frequency Range: Optimized for high-frequency impact detection (up to 10 kHz)
- Sensitivity: High-gain acceleration processing for micro-impact detection
Material Composition
Ruggedized industrial electronics designed to withstand the extreme mechanical vibration environments of reciprocating machinery.
Structural Characteristics
Full-height module with front-panel BNC inputs for accelerometers and dedicated status LEDs for impact and rod drop alarms.
Working Principle
Captures high-frequency acceleration waveforms during the compressor cycle. Advanced digital signal processing isolates impact events from normal mechanical noise, calculating an impact energy value for trend analysis.
Installation Requirements
Accelerometers must be securely mounted directly to the compressor crosshead guide or cylinder head using magnetic bases or threaded studs.
Usage Precautions
Impact thresholds must be carefully established during baseline commissioning. Do not use standard vibration monitoring algorithms for reciprocating compressor impact analysis.
