Description
Rod position monitor for the AMS 6500 mechanical health monitor
The A6210 monitor operates in three different modes: thrust position, differential expansion or rod position.
The thrust position mode accurately monitors the thrust position and reliably provides mechanical
protection by comparing the measured axial axis position with the alarm setting point (drive alarm and relay output).
Shaft thrust monitoring is one of the most important measurement methods of turbomachinery.
Sudden and small axial movement should be detected in 40 milliseconds or less to minimize the two-channel, 3U size, single-slot plug –
Or avoid contact between rotor and shell. Redundant sensors and voting logic are recommended.
The thrust bearing temperature measurement is strongly recommended as a supplement 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 end of the shaft or the thrust ring. displacement
The sensor is a non-contact sensor that measures the position of the shaft.
For safety-critical applications, the A6250 monitor provides triple redundant thrust protection on the SIL Stage 3 overdrive system platform.
The A6210 monitor can also be configured for differential expansion measurement. Due to the change in thermal conditions of the turbine, the shell and rotor are growing
When started, differential expansion provides a measurement of the relative difference
between the displacement sensor mounted on the housing and the sensor target on the shaft.
If the housing and shaft grow at roughly the same rate, the differential expansion occurs
Keep the expected value close to zero. Expansion measurement modes support series/complementary or cone/slope modes.
Finally, the A6210 monitor can be configured to average rod drop mode – for
Monitor sliding strip wear of reciprocating compressors. Over time, rider belts wear out
In horizontal reciprocating compressors, due to the action of gravity
Horizontal oriented piston in compressor cylinder. If the belt wears out beyond specification,
the piston may contact the cylinder wall, causing damage to the machine and possible failure.
By installing at least one displacement probe to measure the piston rod position, you will be notified when the piston drops,
which indicates wear on the ride belt. You can then set the shutdown protection threshold for automatic tripping.
The average bar drop parameter can be used as a coefficient to represent actual rider wear, or nothing can be taken into account
When applied, the rod drop will represent the actual movement of the piston rod.
The AMS 6500 can be easily integrated into DeltaV and Ovation process automation systems,
including pre-configured DeltaV Graphic Dynamo and OvationGraphic
Macro to speed up operator graphics development. AMS software provides maintenance
Staff advanced prediction and performance diagnostic tools
Identify machine faults as early and accurately as possible.
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