By Robert X. Perez
Process machines are serious to the profitability of processes. secure, effective and trustworthy machines are required to keep up in charge production techniques that could create saleable, on-spec product on time, and on the wanted construction rate. because the wards of approach equipment, we want to maintain our apparatus in serviceable condition.
One of the main demanding features of a equipment expert or operator’s task is determining no matter if an working computing device may be close down because of a perceived challenge or be allowed to maintain working. If she or he wrongly recommends a fix be carried out, the rest priceless computer existence is wasted, but when she or he is true, they could retailer the association from critical outcomes, resembling product releases, fires, expensive secondary computer harm, and so on. This fiscal balancing act is on the middle of all equipment assessments.
Troubleshooting is a component technology and half art. easy troubleshooting tables or determination timber are hardly ever powerful in fixing advanced, real-world laptop problems. therefore, the authors are looking to supply a unique technique to assault equipment concerns which may adversely have an effect on the reliability and potency of your plant processes. The technique offered during this booklet isn't really a inflexible “cook e-book” method yet relatively a versatile and dynamic technique aimed toward exploring strategy plant machines holistically, so as discover the real nature the matter at hand.
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Additional resources for Troubleshooting rotating machinery: including centrifugal pumps and compressors, reciprocating pumps and compressors, fans, steam turbines, electric motors, and more
Sample text
Such troubleshooters try not to have preconceived ideas when approaching a problem for the first time. They don’t assume that a machine is always going to fail a certain way or that all operators don’t understand machinery. Fact-driven investigations tend to be more successful than investigations fueled by preconceived notions. There was a machinery engineer who would always jump to conclusions. This particular engineer loved to play the blame game. He would either blame the operators or the last mechanics that repaired the machine.
The manufacturer concluded that the combination of a thin casting thickness at the leading edge of the blade and vane pass pulsations led to a resonant condition at the blade. A resonant condition requires that the components natural frequency (dictated by geometry, material property, and mass, all design issues) coincided with an excitation (pulsation due to vane pass). 4 Example of a fatigue failure on a compressor wheel. 5 Bearing Failure Bearings are mini-systems that require proper design, proper installation, and proper maintenance for successful operation.
Each site may have its own trigger levels for repair costs. It goes without saying that these trigger levels need to be periodically modified for inflation. 1. Do nothing 2. Modify process conditions 3. , balance, align, or lubricate machine as required 4. Plan to repair If a repair is deemed necessary, the maintenance organization should then estimate the repair and outage costs. If the total cost (parts and labor) of the failure is less than $10,000, then a repair should be performed without any additional type of analysis.