After a longer failure history with this gearbox, the customer decided to replace the installed spot measurement by a reliable online monitoring system. The customers´ decision-making process was supported by an open communication between the operator, the PROGNOST Systems team and the gearbox OEM.
Monitored Machine The monitored machine is a secondary LDPE Hyper Compressor (high pressure compressor) in Ethylene service of LDPE production line. What happened? Sequence of events On March 29, the PROGNOST System tripped the Hyper compressor in consequence of high plunger vibration on cylinder 2AVertical position lead LDPE unit for total shut downThe Maintenance group of the customer, started the root cause analysis with assistance of the PROGNOST Systems Customer Support team, they analyzed the data and finally recommended to open the cylinder for inspection Trend over 60 minutes of plunger position Peak-to-Peak values Findings As a result of the cylinder opening the following findings where detected. In the plunger path way they found Chips of packing ring material.The packing [...]
Roll barring is very common in the press and calendars sections with rolls that are nipped together. This example is in a Soft Nip Calendar which has two Beltex rolls nipped against a Tripass steel calendar roll. The Tripass roll is of very high-temperature oil running through it in three passes. The Beltex is a softer covered roll and can be barred fairly easily. Problems caused by Beltex roll After prolong runs the Beltex will start to bar and only get worse until it causes problems in the paper and then it needs to be removed. After removal, they have to grind the cover to remove the flat spot effects that can be seen if the light hits the roll [...]
PROGNOST®-SenSim - a portable device for the simulation of sensor signals It simulates static and dynamic signals for measuring loop test routines. With PROGNOST®-SenSim, testing of machine protection systems procedures can be carried out without disassembly and reassembly of the sensors. This eliminates all associated risks, such as sensor damage or calibration issues. The defined and precise violation of real safety limit settings makes the execution of PTI (Proof Test Interval) fully compliant to IEC regulatory requirements (No manipulation of safety limits to initiate Alarms / Shutdowns / Unsafe conditions). We are happy to announce that PROGNOST®-SenSim was awarded a European Patent on May 30th, 2018.
This case is presenting a defect of a Triple Ring Bearing at the 2nd Press CC Roll. CC refers to “Controlled Crown”. This has the ability to crown or bend the roll slightly to conform to the nip that is pressing against the other roll. Expensive bearing This bearing is very expensive around 50K USD and is very large. It is called a triple ring bearing as it has two sets of rollers so there is an “outer race of the outer bearing” and there is an “inner race of the outer bearing” then there is an “outer race of the inner bearing” and then finally there is an “inner race of the inner bearing”. Trend view In the trend [...]
Safe, reliable and efficient Predictive Maintenance technology. Ask the right question to your CMS vendor. Choose best system for your Rotating Equipment.
The PROGNOST®-Navigator is a 12 inch touch panel with TFT color wide screen display. Designed for field data monitoring. The PROGNOST®-Navigator is the intelligent response to increasingly complex processes and instrumentation status of machines and plants. It displays data of the monitored machine trains as well as the Machine Protection System (MPS) itself. This enables operators a holistic condition overview.