For the thin oil lubrication pump, we take the well-known brand KSB centrifugal pump as an example, there are two common oil seal forms, one is the more common skeleton oil seal, also called lip seal, and the other is called labyrinth seal.
For the oil seal leakage of the new pump, first of all, the customer did not fill the oil according to the operation manual, and added more oil. Another possibility is that after the assembly of the factory, the oil seal was not protected when painting, so that the seal was painted, which made the oil seal leak during the operation of the pump. The line of paint are cut off by the oil seal.
轴密封处被喷了油漆The shaft seal place was sprayed with paint
The other case is that the labyrinth oil seal is used. The oil ditch and oil return hole are processed on the bearing gland. When you open the pump bearing gland, you will see obvious grooves on the shaft. Analyze the reason. It may be that the gland on the side of the drive end is exposed to water vapor and dust in the air, which is greater than that on the non-drive end protected by the protective mesh. When the pump is running, there is a siphon oil leakage phenomenon at the oil seal. When the gap between the inner hole of the gland and the shaft is cleaned by sandpaper or a pocket file, the problem of oil leakage will be solved.
