The seal of the clearance stroke be

The seal of the clearance stroke between the shaft and the end cover hole is a simple seal. The clearance depends on the radial runout of the shaft and the different axial direction of the end cover hole relative to the bearing hole. Some grooves are processed on the end cover hole or journal, generally 2-4, forming the so-called labyrinth. There is a return sump at the bottom of the sump, so when the sump changes direction, the leaking oil will be transported back to the sump. It can also set up oil flinger on the inner side of the seal to prevent splashing oil and enhance the sealing effect.