To completely solve the leakage problem, the method of introducing vulcanized rubber into the coupling and adding vulcanized rubber to the guide ring is adopted.

To better solve the problem of the rolling bearing housing of the centrifugal fan, a negative pressure plate is used and the oil is introduced into the heat dissipation pipe of the negative pressure pump assembly, which solves the problems of the heat dissipation shaft of the original oil sump and the ground pollution. The accumulation of oil and grease on the heat dissipation fan leads to the environmental pollution of the propeller on the heat dissipation fan. The application of grease is increased and the total amount of oil in the re-oiling system is increased. However, due to the improvement of the installation of the exhaust pipe joint and the angle joint, the oil leakage problem has not been solved.

After a long period of observation, when entering the fuel tank, a strong air current can be seen in the fuel tank. At atmospheric pressure, the grease sprays a strong air current onto the medium plate. The fuel tank of the vehicle is used to refuel the vehicle. The air current blows out from the flowing hyperbolic-shaped reversed vortex. The rolling bearing generally operates at high speed. The external and shaft-mounted illumination lamps introduce gas into the storage chamber. The closing of the storage seat and the bearing end cover with labyrinth seal easily exerts pressure on the inner cavity. The smoothness of the air current compression depends on the axial direction between the shaft of the fan and the shaft of the propeller, as well as the smoothness of the annular heat dissipation fan on the inner side of the rolling bearing.