Maintenance and care of bearings
Release time:
2023-08-17
Dismantling of bearings is carried out for regular maintenance and bearing replacement. After disassembly, if the bearings continue to be used, or if it is necessary to check the status of the bearings, the disassembly should be carried out with the same care as when they are installed. Be careful not to damage the bearing parts, especially the disassembly of interference fit bearings, which are difficult to operate.
Dismantling
Dismantling of bearings is carried out for regular maintenance and bearing replacement. After disassembly, if the bearings continue to be used, or if it is necessary to check the status of the bearings, the disassembly should be carried out with the same care as when they are installed. Be careful not to damage the bearing parts, especially the disassembly of interference fit bearings, which are difficult to operate.
It is also very important to design and produce disassembly tools according to the needs. When disassembling, according to the drawings to study the disassembly method, order, investigate the bearing with the conditions, in order to get the disassembly operation of the foolproof.
The outer ring of the disassembly of the outer ring of the interference fit, set up in advance in the shell of the circumference of the outer ring of the extrusion screw with a few screws, one side of the equal tightening of the screw, while disassembling. These screw holes are usually covered with blind plugs, tapered roller bearings and other separating bearings, set out several cuts in the shell to block the shoulder, use the gasket, dismantle with a press, or gently tap to dismantle.
The inner ring can be disassembled most simply by pulling out with a press. At this point, be careful to allow the inner ring to withstand its pulling force. Further, the pull-out fixtures shown are also mostly used, and regardless of the type of fixture, it must be firmly seated on the side of the inner ring. For this reason, it is necessary to consider the size of the shaft retaining shoulder, or to study the processing of grooves in the retaining shoulder, in order to use the pulling and pulling fixtures.
The inner ring of large bearings is dismantled by the hydraulic method. Oil pressure is applied through the oil holes set in the bearing to make it easier to pull out. For bearings with a large width, the hydraulic method is used in conjunction with the pulling fixture to dismantle the bearing.
The inner ring of cylindrical roller bearings can be dismantled by induction heating. Induction heating can be utilized to heat the inner ring locally for a short period of time so that the inner ring expands and is then pulled out. The induction heating method is also used when there is a need to install a large number of inner rings of these bearings.
Cleaning
When the bearing is dismantled for inspection, the appearance of the bearing should be recorded by photography or other means. In addition, the amount of remaining lubricant should be confirmed and the lubricant should be sampled before cleaning the bearings.
a. Cleaning of bearings is divided into rough and fine washing, and a metal mesh frame can be placed at the bottom of the container used.
b, when rough washing, in the oil with a brush and so on to remove the grease or adhesion. At this time, if the bearings are rotated in the oil, it is noted that the rolling surface will be damaged due to foreign objects.
c. For fine washing, turn the bearing slowly in the oil, and do it carefully.
Usually use the cleaning agent for neutral water-free diesel oil or kerosene, according to the need to sometimes use warm lye and so on. No matter which cleaning agent is used, it should be filtered frequently to keep clean.
Immediately after cleaning, coat the bearings with antirust oil or antirust grease.
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