Maintenance and maintenance of mud pump bearings of drilling rigs

　　F series drilling pumps use rolling bearings, which are precision mechanical parts. In order to prolong the service life, the rolling bearings must be carefully maintained. The main bearing is a spherical roller bearing. The pinion shaft bearing is a cylindrical rolling bearing. Cylindrical roller bearings are used at the eccentric, with ribs on both sides to keep the connecting rod on the center line. Crosshead pin bearings are double row cylindrical roller bearings. The bearing does not need special adjustment. The fit of the outer ring and inner ring of all bearings with the hole or shaft is very precise. The inner and outer rings of the bearing are installed in pairs, corresponding to each other, and marked with a matching number. Therefore, when the bearing is installed again, the inner and outer rings must be matched correctly. It is often necessary to replace defective bearings. Even if only one part fails, it must be replaced as a set (inner and outer ring, roller and cage). The movement clearance of these bearings is very small. Defects such as excessive clearance, raceway or wear on the seat ring, and pitting or peeling of parts indicate that the bearing fails and must be replaced as soon as possible. All rolling bearings and journals are fitted by hot fitting (refer to the data of each assembly for bearing fitting). Damaged or worn bearings or races can be knocked off the shaft with a copper rod and hammer, or gas cutting can be used. Remove, but be very careful not to damage the shaft. Assembling bearings is usually heated by oil bath, and the temperature is below 149°C (300°F). The oil and the oil tank must be clean. If you use fire to heat directly from below the oil tank, the outer ring of the bearing should be cushioned when it is placed in the oil tank. The bearing oil bath should not exceed three minutes. Generally do not use flame to heat the bearing, unless in special circumstances, when flame must be used, it can only be operated by an experienced gas welder. The flame is at least 150mm (6″) away from the bearing and can be tested with a thermometer. Overheating. After the bearing is overheated, tempering will cause the bearing to become soft. After the bearing is hot-mounted on the shaft, it should be allowed to cool down naturally. Do not use water or other liquids to cool the hot bearing. Fast cooling will cause the inside and outside of the bearing The ring and roller are scrapped due to "hot cracking". Do not directly knock the bearing with a steel hammer. If you must install the bearing in place, you can tap it gently with a wooden hammer. Usually, lubricate the journal and install it before installing the bearing. Hole, a good lubricant is white lead oil, which is a kind of anti-adhesive oil. After the bearing is taken out of the packaging box, prevent dust and foreign matter from entering the bearing. Clean the packaging anti-rust grease before assembly. Cleaner should be used cleanly Kerosene or other solvents