A6210  Rod Position Monitor Machinery Health Monitor

Description

A6210   Rod Position Monitor for AMS 6500 Machinery Health Monitor

The A6210 monitor operates in 3 distinct modes: thrust position, differential
expansion, or rod position.
The Thrust Position mode accurately monitors thrust position and reliably provides
machinery protection by comparing the measured axial shaft position against alarm
set-points – driving alarms and relay outputs.
Shaft thrust monitoring is one of the most critical measurements on turbomachinery.
Sudden and small axial movements should be detected in 40 msecs or less to minimize
or avoid rotor to case contact. Redundant sensors and voting logic are recommended.
Thrust bearing temperature measurement is highly recommended as a complement to
thrust position monitoring.
Shaft thrust monitoring consists of one to three displacement sensors mounted in the
axial direction parallel to the shaft at the shaft-end or thrust collar. The displacement
sensor is a non-contact sensor that measures shaft position.
For extremely critical safety applications, the A6250 monitor provides triple-redundant
thrust protection built on the SIL 3-rated overspeed system platform.

A6210 9199-00003

The A6210 monitor can also be configured for differential expansion measurements.
As both the case and rotor grow due to changes in thermal conditions at turbine
start-up, differential expansion delivers a measure of the relative difference between
mounted displacement sensors on the case and the sensor target on the shaft. If the
case and shaft grow at approximately the same rate, then the differential expansion
remains close to the desired value of zero. The differential expansion measurement
mode supports tandem/complementary or cone/ ramp modes.
Finally, the A6210 monitor can be configured for average rod drop mode – used to
monitor rider band wear in reciprocating compressors. Over time, rider bands wear
in horizontal reciprocating compressors due to the force of gravity acting on the
horizontally-oriented piston in the compressor cylinder. If the rider band wears beyond
spec, the piston can contact the cylinder wall and cause incremental machine damage
and possible failure.
By mounting at least one displacement probe to measure the piston rod position, you
will receive notification when the piston drops – an indication of rider band wear. You
can then set shutdown protection thresholds for automatic trip. The average rod drop
parameter can be factored to represent the actual rider band wear, or with no factor
applied, rod drop will represent the actual movement of the piston rod.
The AMS 6500 includes easy integration to the DeltaV and Ovation process automation
systems, including preconfigured DeltaV Graphic Dynamos and Ovation Graphic
Macros to speed operator graphic development. AMS software provides maintenance
personnel advanced predictive and performance diagnostic tools to confidently and
accurately determine machine malfunctions early.

Please contact Sunny sales@xiongbagk.cn for the best price.

➱ sales manager: Sunny
➱ email mailto: sales@xiongbagk.cn
➱ Skype/WeChat: 18059884797
➱ phone/Whatsapp: + 86 18059884797
➱ QQ: 3095989363
➱ Website:www.sauldcs.com