【Q&A Question 071】June 30, 2016
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【Q&A Question 071】June 30, 2016: What are the factors causing high temperatures in the compressor’s sliding bearings? The answer key can be seen after responding; scoring is based on identifying the key points. 1. Leakage from cylinder packing ； 2. The amount of cooling water for the sealing filler is low.
Factors such as temperature, lubrication method, amount of lubricating oil, quality of lubricating oil, type of lubrication, type of bearing shells, shell clearance, load on the bearing shells, level of scraping, amount of cooling water, and ambient temperature can all be related to this.
1: Issues with oil quality and flow rate. 2: Issues with the oil heat exchanger. 3: Vibration of the shaft, possibly due to an imbalance between the bearing pads. 4: Air seal leakage issue. 5: It is necessary to record data for assessment, including the actual values of pressure and temperature under various load conditions.
1. The cooling effect of the oil cooler is poor. Second, lubricant emulsification leads to a deterioration in oil quality. Third, the load is too high or the speed is too high. Fourth, the clearance of the bearing shells is inappropriate, which can be determined based on shaft vibration and displacement.
The cylinder packing is leaking, and the amount of cooling water for the sealing packing is low.
1. Issues with oil quality and flow rate. 2. Problems with the oil heat exchanger. 3. Vibration of the shaft may be due to an imbalance between the bearing pads. 4. Air seal gas leakage issue.
Lubrication effect, cooling, bearing eccentricity
1. Wear of the bearing surface 2. Poor cooling effect of the lubricating oil 3. Compressor overload 4. Insufficient lubricating oil flow 5. Insufficient viscosity of the lubricating oil
Poor lubrication, excessive load, problems with the bearing itself!
1. The temperature sensing thermocouple is inaccurate； 2. Poor oil quality or deterioration ； 3. Insufficient oil quantity or no oil: clogged oil delivery channels, pump issues, etc ； 4. High oil temperature ； 5. Poor quality of bearings ； 5. The ellipticity and taper of the shaft diameter do not meet the technical requirements ； 6. The ellipticity and taper of the inner diameter of the compressor rod big end do not meet the technical requirements ； 7. The assembly clearance is too small or uneven ； 8. The contact surface between the shaft and the bearing does not meet the technical requirements ； 9. The alignment of the inner diameter axes of the large and small ends of the compressor rod does not meet the technical requirements. 10. Entry of foreign objects ； 11. Other reasons.