FD, PA, ID FANS - STI Vibration Monitoring Inc.

MACHINERY APPLICATION NOTE
With Bill of Materials (BOM)
FD, PA, ID FANS:
Vibration Monitoring for Large Fans with Journal Bearings
Machinery Applications Include: FD Fans, Forced Draft Fans, PA Fans, Process Air Fans, ID Fans,
Induced Draft Fans, Boiler Fans, Power Generation, Steam Power Plants, PdM for Fans, Fan Condition
Monitoring, Fan Vibration Monitoring, Fan Protection System, Fan VMS.
Large Motor Driven and Turbine Driven Fans are used for Forced Draft, Induced Draft and Process Air
in Steam Power Generation. These Fans can range from a few hundred to several thousand
horsepower. Speeds are moderate and usually between 300 and 900 RPM. Due to the high
horsepower and heavy loading Journal Bearings are prevalent. It is recommended that Journal
Bearings be monitored with Proximity Probe (Shaft Relative) System. Experience has shown that the
Fans Journal Bearings themselves alternately can be monitored radially using Accelerometers. This is
due to the heavy rotor/light casing ratio of the Fan assembly and the flexibility of the bearing
mounting pedestals. This exception is for the Fan only and Motors, Turbines and Gears should be
monitored using Proximity Shaft Relative Systems. The Fans Thrust Bearing should also be monitored
with Proximity Probe Systems.
Ver. 1 Rev 02-02-15
Vibration Monitoring for Large Fans with Journal Bearings
PdM or Data Collector BOM:
A Stand Alone PdM or Data Collector System or BOM (Bill of Materials) is not recommended for Journal
Bearing Critical Machines. A PdM or Data Collector program can be done supplementary or in
conjunction to a Vibration Protection System. STI’s Vibration Monitoring Systems below provide BNC
connectors to connect Analyzers or Data Collectors to the raw (buffered) signal for each sensor.
Protection System BOM using Plant PLC or DCS:
The Protection System BOM (Bill of Materials) meets the requirements of API-670 and provides a simple
low cost approach to Vibration Monitoring making use of the plants PLC/DCS or Historian for alarming
and trending of values. A 4-20mA signal is provided for connection to local Field IO. The STI CMCP500
Series Transmitters connected to the machine mounted proximity probes and accelerometers provide
Signal Detection, Signal Integration, Power Regulation, OK Circuitry, Timed OK Danger Defeat, Range
Selection and Sensor Power.
Qty.
Qty.
Qty.
“A”
“B”
“C”
A. Sensors
26
11
7
1
4
1
4
B. Mounting Hardware
8
2
2
8
2
2
16
8
4
2
1
1
4
2
2
C. Monitoring System
1
4
16
8
4
8
2
2
2
1
1
2
1
2
1
1
1
Part Number
Description
Proximity Probe System
CMCP786
CMCP602L-32-03-01
8 mm Probe, 5m Cable and Driver
Industrial Accelerometer w/5015 Connector
32’ Armored Accelerometer Extension Cable
CMCP4190-02
CMCP803-01
CMCP801-XXX-01
CMCP805-01
CMCP140-08
½” NPT Proximity Probe NPT Adapters
½” NPT Conduit Head
Proximity Probe Holder, External Mount
Probe Mounting Block, Internal Mount
Proximity Probe Driver Enclosure
CMCP525-02P
CMCP530-100A-R-ISO
CMCP540-200-02(52)
CMCP545-02(52)
CMCP595-Key
CMCP515-2080
CMCP500-XX-PS-01*(**)
Acceleration (g) Transmitter
Velocity Transmitter
Radial Vibration Transmitter
Thrust Position Transmitter
Keyphasor Module
+24 and -24 VDC Power Supplies
Painted Steel Enclosure (Transmitters
Installed)
*Local Loop Powered Displays Available
** Substitute XX with Quantity of Transmitters from Column
Ver. 1 Rev 02-02-15
Vibration Monitoring for Large Fans with Journal Bearings
Protection System BOM (Stand Alone):
The Stand Alone Protection System BOM meets the requirements of API-670 and provides all the
features of the above Protection System with the addition of Relay Modules and Displays. OK, Alert and
Danger Alarms and 5 amp Relays are provided for each channel. The ability to select alarm delay, trip
multiply, latching or non-latching relays are provided. Terminal for remote reset is also provided. The
CMCP5304 is a complete system simply supply AC line power and connect sensors.
Qty.
Qty.
Qty.
Part Number
“A”
“B”
“C”
A. Sensors
26
11
7
Proximity Probe System
1
4
CMCP786
1
4
CMCP602L-32-03-01
B. Mounting Hardware
8
2
2
CMCP4190-02
8
2
2
CMCP803-01
16
8
4
CMCP801-XXX-01
2
1
1
CMCP805-01
4
2
2
CMCP140-08
C. Monitoring System
1
CMCP525-02P
4
CMCP530-100A-R-ISO
16
8
4
CMCP540-200-02(52)
8
2
2
CMCP545-02(52)
2
1
1
CMCP595-Key
1
1
1
CMCP7500MMS-XX(**)
*Local Loop Powered Displays Available
** Substitute XX with Quantity of Transmitters from Column.
Description
8 mm Probe, 5m Cable and Driver
Industrial Accelerometer w/5015 Connector
32’ Armored Accelerometer Extension Cable
½” NPT Proximity Probe NPT Adapters
½” NPT Conduit Head
Proximity Probe Holder, External Mount
Probe Mounting Block, Internal Mount
Proximity Probe Driver Enclosure
Acceleration (g) Transmitter
Velocity Transmitter
Radial Vibration Transmitter
Thrust Position Transmitter
Keyphasor Module
+24 and -24 VDC Power Supplies
Recommended Installation Accessories (All Systems):
The following are STI’s recommended Installation Accessories. Quantities vary as shown depending on
the BOM selected above. More details and instructions on Accelerometer Installation can be found
under our Application Notes at this link:
http://www.stiweb.com/appnotes/Accelerometer_Installation_Guide.html
Qty.
?*
?*
1
?*
Part Number
CMCP200-01
CMCP210
CMCP270
CMCP230-02
Description
1” Diameter x ¼” Thick Mounting Pads
Acrylic Adhesive Bypacs
Piloted End Mill Spot Reamer
¼” x 28UNF x ¾” SS Mounting Studs (10 Pack)
?* Calculate based on Number of Accelerometers or Channels.
Ver. 1 Rev 02-02-15
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