How is the average service life of bearings and seals in the entire unit calculated?
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As the title says. Questions that have arisen in our unit regarding the calculation of the average lifespan of bearings and seals in maintenance equipment. I wonder how everyone calculates it? Since there is nothing to draw from, I came up with the following approach: calculate the total usage time of all bearings and seals that are currently in use (on a 24-hour basis; it would be impossible to determine the actual usage time for each individual device, given the large number of devices involved), add to this the usage time of those bearings and seals that have been used in these devices before (based on historical records), and then divide by the total number of bearings and seals that are currently in use or have been used previously to obtain the average lifespan. Can everyone help me analyze whether this is feasible? For example, if my operation started on January 1, 2016, and I want to calculate the average lifespan up to February 1, 2016, the equipment has 100 bearings; 97 of these have never been replaced, while 3 bearings were taken out of use on January 15, 2016, and replaced on January 17. The total time is therefore 97×31×24 + 3×14×24 + 3×15×24 = 74,256 hours. With a total of 103 bearings, the average lifespan is 74,256/103 = 720.9 hours. At first, this figure will keep increasing; over time, after a few years, as more and more bearings are replaced, the lifespan value will stabilize at a certain level with minimal changes. Could everyone please advise whether this method of calculation is feasible?
No way, hasn’t anyone thought about this issue?»
This post was last edited by svenzheng on 2016-8-26 at 17:46. Bearings should be inspected after 3,000 hours of operation to check for signs of wear or damage; if any issues are found, they should be replaced promptly. What’s the use of going through all that trouble to calculate those things? Your bearings can’t be fake! Also, your installation is correct and the medium is clean
For mechanical seals that adhere to API standards and have no backup units, it is recommended to replace them every three years; for domestically produced mechanical seals, replacement is advised after 8,000 to 12,000 hours of use； Of course, if your operating conditions are stable, the process is stable, the flushing procedure is correct, and there are no other interfering factors, then it’s possible for your mechanical seal to last for days, weeks, months, or even N times before needing to be replaced. Adjust according to the actual situation of your own company. If a leak is detected, repair or replace it.
The KPI indicator for unit leaders requires calculating the bearing lifespan
Your boss is crazy; he thinks he’s some senior ME who came from a foreign-funded company! Neurosis – some useless nonsense