2 floating bearing wear

Floating bearing wear is a supercharger oil spill one of the most common fault. After the failure of such, the bearings and shaft gap between too much and film instability, capacity decreased, the rotor shaft vibration aggravated undermine balance. Too much sealed at both ends of the radius of rotation damage may be serious supercharger to the entire destruction. This failure primarily for the following reasons:

2.1 specification did not use pressurized oil

Turbocharged engines after the heat load and mechanical load substantial increase in the working conditions of a very high temperature, so that the oil temperature increases, the viscosity decreased capacity declined. Supercharger and the engine speed higher than the speed nearly 20 times, turbocharger bearings, the temperature is much higher than the temperature of the engine crankshaft. This requires high viscosity oil, to be capable of high-speed rotor load and high temperature, but also has good dispersion, oxidation resistance and wear resistance, and general it is very difficult to achieve this oil use requirements.

Pressurized oil in general on the basis of oil has been added to a variety of additives from a multi-grade oil. Has excellent dispersion, oxidation resistance, corrosion resistance and wear resistance, it is necessary instructions on the proper use of the specification pressurized oil.