1. Small details that must be paid attention to when installing the seal kit:
- Generally speaking, the seal kit refers to the skeleton seal kit. The role of the seal kit is generally to isolate the parts that need to be lubricated from the output parts in the transmission parts, so as not to allow the lubricant to leak. The skeleton is like the reinforcing steel in the concrete component, which strengthens and keeps the seal kit in shape and tension. According to the structure, it can be divided into single-lip skeleton seal kit and double-lip skeleton seal kit.
2. Sealing principle:
- Because there is an oil film controlled by the seal kit edge between the seal kit and the shaft, this oil film has fluid lubrication characteristics. Under the action of the surface tension of the liquid, the stiffness of the oil film just makes a crescent surface between the oil film and the air contact end, preventing the leakage of the working medium, thereby achieving the sealing of the rotating shaft. The sealing ability of the seal kit depends on the thickness of the oil film on the sealing surface. If the thickness is too large, the seal kit leaks; if the thickness is too small, dry friction may occur, causing seal kit and shaft wear; if there is no oil film between the sealing lip and the shaft, it is easy to cause heat and wear.
- Therefore, during installation, you must apply some oil to the seal ring, and at the same time, ensure that the skeleton seal kit is perpendicular to the axis of the shaft. abrasion. During operation, the lubricant in the housing slightly oozes out, and it is most ideal to achieve a state where an oil film is formed on the sealing surface.