Tham khảo tài liệu 'know and understand centrifugal pumps episode 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Know and Understand Centrifugal Pumps To remove old grease from the bearing internals and the housing Remove as much as possible by hand. Flush the bearing and housing with warm kerosene. Following by a flush with mineral oil SAE 10 viscosity. If the old grease is caked and hardened Soak the bearing and housing in heated kerosene. Slowly rotate the bearing by hand. Rinse the bearing with clean kerosene or degreasing solvent. Again rotate the bearing s outer race by hand while applying a modest axial and radial load to the balls and races. Soak and rinse again as necessary until the bearing rotates freely and smoothly. Once all the old grease is removed from the housing and the bearing is cleaned it should be thoroughly inspected for damage. If the bearing is not damaged it can be repacked with new grease of the correct type and consistency and reinstalled in the equipment or stored for future use. To store the bearing wrap it completely in wax or oilpaper and place into a storage box. The following table contains some simple Do s and Don ts for handling and working with bearings. Memorizing and practicing these suggestions will extend the service life of rolling element bearings. Do s Don ts 1. Make sure all tools and surroundings are clean. 2. Use only clean lint-free cloths with no strings to wipe bearings. 3. Use only clean flushing fluids and solvents. 4. Don t handle bearings by hand. It s best to use clean cotton gloves. 5. Remove all outside dirt from the housing before exposing the bearings. 6. Make sure the internal bearing chamber is clean before replacing bearings. Don t use chipped or dirty tools. Don t use cotton waste or dirty cloths to wipe bearings. Don t use leaded gasoline to rinse bearings. The chemical additives are harmful to your health. Don t handle bearings with wet or dirty hands. Don t work in a dirty surrounding. Don t scratch or nick any bearing housing or shaft contact surface. 164 Bearings Do s Don ts 7. Place bearings on clean paper.
