Regarding the issue of pump and compressor turning
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The plant equipment has not been put into operation; all the machinery remains shut down. It is required to manually turn the shaft every day. Does turning the shaft of centrifugal pumps and compressors need to follow a certain direction? Is it a reversible turntable? Also, may I ask how to determine the type of compressor? How to determine the compressor model by its appearance? What kind of compressors require daily turning? For what kind of compressors are the requirements for shaft turning relatively less strict? I would appreciate some guidance from experts. Thank you.
The requirement is to rotate the disk in both forward and reverse directions, right? This is mainly done to check for any friction, collisions, or sticking within the unit, thereby ensuring safe operation after startup.
Why is it required to turn the shaft 180 degrees per day? The purpose is to prevent the shaft from remaining bent and sagging at an angle over a long period of time. All horizontal pump types are the same. The shielded pump won’t spin, and some magnetic pumps either won’t spin.
Turning the pump shaft usually involves rotating it 3-5 times in the direction of operation. For reciprocating compressors, it’s not necessary to turn the shaft every day; generally, it’s sufficient to do so once a week, rotating it 2-3 times each time. This is what is meant by routine maintenance of the equipment through shaft rotation
The requirement is to operate the steering wheel in the direction of the motor’s rotation; it is said that this takes into account the machine seal as well as the nuts used to prevent the impeller from coming loose. The purpose of turning the shaft is to prevent sticking, which could cause the motor to burn out, as well as to prevent the shaft from bending or deforming. We usually turn the spare equipment shaft once a week; after rotating it a few times, we turn it an additional 180 degrees.
It is mainly to prevent the shaft from bending; it is required to turn it 3-5 times a day followed by a 180-degree rotation
This shaft is rotated 180°; it’s not clear how that happens. It seems that after being rotated several times, it stops at an angle of 90° or 270° relative to its previous position. Rotating the shaft is done to eliminate any sagging or deformation of the shaft. Regarding reversal, check the bearing type and the lubricant flow channels; don’t worry about the lubricant flowing in the reverse direction during reversal – a lack of lubrication is usually not an issue :)
Our pumps and small compressors are rotated once a day during the daytime shift (to avoid forgetting), and it can be done in either direction； Large compressors can’t be coiled.
Centrifugal pumps are mainly used to prevent shaft bending and jamming, and they should be rotated once a day. Compressors are equipped with an auto-rotation device, and it is sufficient to rotate them once a week.
Rotating the equipment is a basic operation for its maintenance; for horizontal equipment, this is done to prevent deformation of long, slender shaft components, and generally 2-3 rotations are sufficient.
For centrifugal pumps, it is best to rotate the shaft once a day, preferably in the forward direction; this is done mainly to prevent the shaft from bending or getting stuck. Rotating the shaft in the reverse direction makes it difficult to detect or sense any obstructions, as this is related to the flow direction of the impeller. The compressor itself can start the cranker; it’s best to make a mark when cranking the machine. The stop point after cranking must be changed each time to prevent the crankshaft from bending.