Three screw pump bearing precautions:
The radial clearance of the sliding bearing has a great influence on the bearing overheating and life. Therefore, the radial clearance must be strictly controlled within a reasonable range.
The radial clearance is increased by a little, Δ=0.03mm. At this time, the bearing pair of the bearing can work normally, but its service life is greatly shortened. Therefore, when determining the radial clearance of the bearing, the bearing should be guaranteed to work normally. Keep it as small as possible. After the bearing is assembled, firstly, it should be well-integrated and tested according to the running-in test run specification, and then gradually load and accelerate, so that the joint surface of the shaft and the bearing is flattened. Normal operation. Otherwise, even if the clearance is not small, it is put into normal operation because it is not subjected to the running-in test after assembly, which causes the bearing to overheat or even burn. For this, the radial clearance of the sliding bearing should be controlled at 0.10mm. ~0.15mm.
When determining the radial clearance of the bearing, the factors affecting the radial clearance should be fully considered. In addition to considering the diameter, speed, load and accuracy of the shaft, the following points should be considered:
1: Sudden change in starting conditions.
2: Roughness of the shaft and bearing surface.
3: The geometry and mutual position error of the journal and bearing (ie roundness, cylindricity, coaxiality, etc.).
4: The working temperature of the bearing.
5: Bearing material. Different bearing materials, different expansion coefficients, different clearances
The radial clearance of the sliding bearing has a great influence on the bearing overheating and life. Therefore, the radial clearance must be strictly controlled within a reasonable range.
The radial clearance is increased by a little, Δ=0.03mm. At this time, the bearing pair of the bearing can work normally, but its service life is greatly shortened. Therefore, when determining the radial clearance of the bearing, the bearing should be guaranteed to work normally. Keep it as small as possible. After the bearing is assembled, firstly, it should be well-integrated and tested according to the running-in test run specification, and then gradually load and accelerate, so that the joint surface of the shaft and the bearing is flattened. Normal operation. Otherwise, even if the clearance is not small, it is put into normal operation because it is not subjected to the running-in test after assembly, which causes the bearing to overheat or even burn. For this, the radial clearance of the sliding bearing should be controlled at 0.10mm. ~0.15mm.
When determining the radial clearance of the bearing, the factors affecting the radial clearance should be fully considered. In addition to considering the diameter, speed, load and accuracy of the shaft, the following points should be considered:
1: Sudden change in starting conditions.
2: Roughness of the shaft and bearing surface.
3: The geometry and mutual position error of the journal and bearing (ie roundness, cylindricity, coaxiality, etc.).
4: The working temperature of the bearing.
5: Bearing material. Different bearing materials, different expansion coefficients, different clearances
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