STI Reciprocating Compressor

www.stiweb.com Vibration Monitoring & Machine Protection Systems

Copyright 1999, Frank Howard, STI Vibration Monitoring, Inc. League City, Texas USA

Reciprocating Compressor Application


Maintenance Cost are 3.5 X that of centrifugal equipment. Condition Monitoring can achieve substantial savings in maintenance cost and in increased run time.

Reciprocating Compressor Application


Frame Vibration

Crosshead Vibration

Rod Drop

Rod Run-Out

Main Bearing Vibration

Valve Temperature

Pressure Volume Curve

Rod Loading

Reciprocating Compressor Measurement Parameters:


Frame Vibration

Prevent Catastrophic Failure and reduce overall damage Most common method of tripping machine. Replaces OEM supplied “Earthquake” switch.


Solid State Design (Long Life) Low Frequency Response Indication of Vibration Levels Alert & Danger Alarms Shutdown “AND” Voting Fault Detection Vibration Diagnostic Capability

CMCP530Velocity Monitor

Advantages overOEM “EARTHQUAKE” Switch


Crosshead Vibration


Increased clearance between Crosshead and the babitt surfaces. Indicator of Crosshead Pin “reversal” problem. Loose Rod Nuts & Bolts Liquid in the process Machine shutdowns for repair can be scheduled.

CMSS2100 Accelerometerand CMCP280 Housing

CMCP525Acceleration Monitor

Crosshead Vibration


Rod Drop


Eliminate periodic inspections that require machine shutdown and disassembly Provide real time trend of rider ring wear.

CMCP545Position Monitor

Eddy ProbeSystem

Rod Drop


Assurance that Rod Run Out is within tolerable limits after the machine is at operating speed and temperature. Provide early warning of gland seal failure caused by Rod Run Out. Alarms & Shutdown available.

CMCP540Displacement Monitor

X,YEddy Probe

System

Rod Runout


Provide early warning of main bearing failure Alarms & Shutdown available.

CMCP540Displacement Monitor

X,YEddy Probes

Main Bearing Vibration


Valve Temperature

Cylinder

Valve failures account for greater than 40% of problems.

44 Temperature Pointson this machine...


Provide early indication of valve problem. Isolates the problem valve for repair. Trending condition allows for scheduled shutdowns. Prevent damage to cylinder lining that occurs when valve parts are ingested by the machine.

RTD

Valve Cover

CMCP560RTD Monitor

Valve Temperature

Cylinder


Explosion Proof

Transducer Housings

Transducer terminations (+) and (-) 24Vdc Power Supplies CMCP500 Series Transmitter/Monitors A/D Converter with DCS protocol.


Explosion Proof Housings

DCS Multi-Drop Link

DCS Link Connection to Control Room

110Vac

Xdrs Xdrs Xdrs

Xdrs Xdrs Xdrs

Explosion Proof Housings


F=PAInboard

F=PAOutboard

Phase Reference

Pressure SensorMounted Inboard & Outboard through Cylinder Wall

For

c e 0

Crank Angle

360 180 270 90

Rod Load


Accelerometer on coupled & Outboard bearing in Horizontal direction (Velocity Measurement).

Motor Drive:

Gas Engine: Accelerometer inside the engine on main bearing supports for detonation & mechanical looseness detection (Acceleration Measurement).

Turbochargers, Cooling Water Fans, Water Pumps, and Oil Pumps

Auxiliary Equipment Monitoring


Pressure SensorsEddy Probe(Rod Drop)

Eddy Probe(Phase Reference)

CMSS2100 Accelerometer(Crosshead Vibration)

CMSS2100 Accelerometer

(Frame Vibration)

Temperature Sensors

Reciprocating Compressor Monitoring Summary

STI Reciprocating Compressor

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