High bearing temperature in centrifugal pump
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The 600S47 bearings are overheating; this is the case for all 3 pumps. The temperature at the rear end of the bearings is 75 degrees, while it’s 56 degrees at the drive end. Technologies related to water pumps include CFD and numerical simulation. Relevant forums include the China Pump Technology Forum, Pump Technology Forum, Pump and Valve Forum, Water Pump Forum, China Pump Technology Network, China Pump Selection Network, Pump Forum, Pump Technology Forum, Comprehensive Pump Forum, as well as discussions on pump technology and the principles of centrifugal pumps. Topics also include water pump maintenance, training related to water pumps, water pump prices, centrifugal pump design, pumps and valves, pump stations, chemical pumps, water pump design software such as PCAD, and the online community for those working in the water pump industry. By chance, I heard that when using an infrared thermometer, the temperature of the bearing housing was 50 degrees, while the temperature of the main shaft adjacent to the bearing housing was 80 degrees. I think it might be due to the skeleton seal on the bearing housing being too tight; I’ve sent someone to repair the inner hole of that skeleton seal. . The temperature of all bearings has dropped to 35 degrees. Have you come across cases like those seen on other websites? Does it make sense?
I’ve never encountered it, but the skeleton oil seals are designed at the factory, so there’s usually no problem. Is it caused by excessive roundness or runout of the shaft? Moreover, is the oil-sealing effect good when repairing the inner hole?
I think it might be that if the outer ring of the skeleton oil seal is too tight, it will cause the inner ring to become tight as well, leading to increased friction and high temperatures
I’ve never encountered it, but it’s possible. When dealing with such a situation, it’s necessary to first check whether the pump’s operation is affected by excessive vibration. Additionally, the shaft seal area should be disassembled and inspected to assess any play there as well as the condition of the skeleton oil seal. Each issue needs to be analyzed and addressed accordingly; it’s not advisable to modify the skeleton oil seal blindly. If it’s necessary to enlarge the inner diameter, this should be done based on the shaft’s diameter.
I haven’t encountered this situation before, so it’s hard to say. As for repairing the inner hole of the skeleton oil seal, we do it manually; could this result in insufficient roundness of the oil seal, thereby leading to leaks?
Rolling bearings can function properly at temperatures below 95 degrees; the temperature mentioned by the poster isn’t high at all!
Is the lubrication effect of your pumps not good? Also, has your lubricating oil been subjected to three-stage filtration before use? The quality of the oil is very important! ! Another issue is whether the viscosity of your lubricant meets the requirements of this equipment! !
I have never seen a case where bearings overheated due to skeleton oil seals. The inner ring of the skeleton oil seal is soft by nature, and sealing is achieved through the force of a spring – so how can heating occur? There must be other reasons as well; the original poster is conducting a thorough search to avoid serious accidents that could disrupt production.