What are the cleaning and shaft holding functions of a centrifugal pump?
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May I ask: What are the cleaning of the centrifugal pump and shaft sealing? This post was last edited by zhangya*ong on 2009-1-22 14:11]
Is the scanning caused by the impeller scraping against the pump casing? Shaft binding is caused by a stuck bearing or impeller
I’ve never heard of the term “scan line” before. Shaft seizure is a common phenomenon; in roller bearings, the inner ring and the shaft bushing experience high-temperature friction due to poor lubrication, which causes them to fuse with the shaft, making it difficult to remove them. Sometimes, the entire shaft has to be replaced. Shaft binding is a relatively serious equipment accident.
Scraping occurs when the motor rotor rubs against the stator coils, damaging them.
Line cleaning should be carried out during major equipment maintenance, before removing the pump, by using steam to purge the medium inside the pump chamber, in order to remove the viscous medium present within the pump. Generally, line cleaning is required for equipment used to transport media such as crude oil, heavy oil, residue, and wax oil.
I agree with what was said on floor 5; I’ve never heard of the issue of cleaning lines in cases of centrifugal pump failures. For our centrifugal pumps used for transporting heavy crude oils, line cleaning is indeed used during maintenance. Since we mainly work with light crude oils, the principle of similar substances mixing well is applied to keep the inside of the equipment as clean as possible. After that, steam and nitrogen are used for purging, followed by pressure release before proceeding with maintenance.
1. I’ve never heard of the term \"cleaning the pipeline\" in relation to centrifugal pumps. 2. Unless it is a pump specifically designed for such cleaning tasks, where \"cleaning the pipeline\" refers to removing material from the pipelines, etc. 2. In some cases, the situation where the bearings of a centrifugal pump stick together is referred to as \"seizing\"; this occurs when there is no lubrication or some other fault that causes the bearings and the shaft to grind against each other, resulting in high temperatures that cause them to stick together
What he might be referring to is cleaning the interior of the device; this phenomenon also occurs with the impeller and the ring, as well as with the motor rotor. As for shaft sealing, I won’t say much about it – what was said above is already clear enough
Scanning the line should refer to cleaning the medium inside the pump, while shaft jamming generally denotes the sticking of rotating components
In addition to the reasons mentioned above, there is also the issue of pump shafts freezing outdoors in northern regions during winter
I’ve heard of the scan line guide for the first time; I wonder if any expert knows about it