How to solve the high temperature of Roots fan?

Roots fan in the work in operation because the impeller in the fan has been rotating, the hub and gears are also turning to, the fan will generate heat, heat will make the fan temperature becomes high, Roots fan temperature becomes high what are the reasons? The next editorial will say.
One, too much oil in the tank, or too thick and dirty:
Two, the filter or muffler is clogged;
III. Pressure higher than specified.;
Fourth, the impeller is excessively worn and has a large clearance;
Fifth, poor ventilation and high indoor temperatures cause high inlet temperatures
Six, running speed is too low, the belt slips.

These are some of the common causes of high fan temperatures. Then how to solve it? Here are the solutions
The solution to the first one is to lower the oil level or hold the oil, the solution to the second one is to clear the blockage, and the solution to the third one is to lower the differential pressure through the blower.
The solution to number four is to fix the gap, the solution to number five is to open vents to lower the room temperature, and the solution to number six is to increase the RPM to prevent the belt from slipping.