I need help – what parameters are generally monitored by an online monitoring system for reciprocating compressors?
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The unit is equipped with a reciprocating compressor, and an online monitoring system is planned to be installed. What parameters generally need to be monitored, such as crankcase vibration and piston rod settlement? What else is required?
Bearing pad temperature, oil temperature, outlet temperature, etc
Parameters to be monitored: intake and exhaust valve temperatures, piston rod depression, crankshaft angle, intake and exhaust pressures, lubricating oil pressure and level as well as temperature, crosshead vibration, power diagram, bearing temperatures, crankcase vibration, etc
Water route: upstream water pressure, temperature, flow rate； Oil circuit: oil temperature, oil pressure, oil filter pressure difference, bearing temperature, etc ； Gas circuit: inlet and outlet pressures, temperatures at various stages, etc
Process gases: Pressure at the inlet and outlet of each stage, temperature at the inlet and outlet of each stage, temperature of the gas entering and leaving the cooler, temperature of the compressor’s inlet and outlet valves. Nitrogen: Pressure used for filling the packing with nitrogen. Oil system: Pressure at the outlet of the oil pump, pressure in the main oil supply line, differential pressure across the filter, temperature of the oil at the outlet of the oil cooler, temperature of the oil exiting the machine body, level of the lubricating oil in the reservoir, level of the oil in the filler. Cooling water: Temperature at the inlet and outlet, including for the cylinders, inter-stage cooling, after-cooling, and packing box cooling. Packing box: Temperature of the packing box. Temperature of the compressor’s main bearings, temperature of the motor bearings, temperature of the motor stator. Vibration of the machine body, monitoring of piston rod movement downward, temperature of the crosshead. The parameters to be monitored are selected based on the type of medium and the importance of the machine, with appropriate adjustments made as needed. It is best to do it together with the technicians from the compressor factory
Current and temperature are definitely necessary; other specific issues need to be analyzed on a case-by-case basis