Shutting down issues of reciprocating compressors
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I would like to ask everyone: what consequences could occur if a reciprocating compressor is stopped while it is operating at full load?
If the check valve between stages is not tight, it can cause overpressure in the previous stage
Based on the actual conditions at the site, there are generally no serious direct consequences; this is similar to situations where shutdowns occur due to interlock actions or sudden power fluctuations. It should be noted that after such a shutdown, the idling time of the unit is very short; it is recommended to activate the crankshaft rotation device promptly, and continue rotating the crankshaft for some time before bringing it to a complete stop
Generally speaking, stopping a reciprocating compressor when it is under full load does not cause significant damage to the compressor itself, but it is necessary to check whether the oil feed pump starts properly； However, it will have a significant impact on the process system.
Will a stop at full load cause severe damage to the crankshaft?
I have a gentle question: what is idle walking? What impact will this shortened time have?
Once the engine loses its power source, it continues to move due to the inertia stored in the flywheel, until its kinetic energy is completely exhausted through friction and it comes to a stop. The period from the loss of power to complete stop is known as coasting. (This is purely based on personal experience; please take it with a grain of salt.) If the coasting time is too short, it’s like applying the brakes suddenly while driving – the stress between the various moving parts isn’t released properly, and the low-speed friction between the friction pairs isn’t sufficient. As a result, the running-in process after the oil film on those friction pairs is lost is shortened, increasing the risk of sudden mechanical damage when trying to restart the engine. (Again, this is purely based on personal experience; please take it with a grain of salt.)
It doesn’t make a difference; you can stop it whenever you want.
Check whether the outlet valve and the outlet check valve are tightly closed; otherwise, high-pressure gas may flow back to the low-pressure side, which poses a certain risk.
There is no impact; I activated the interlock on the new hydrogen machine several times and found no abnormalities