The lubricating oil of the reducer will produce many small bubbles when the gear is stirred. If the small bubbles disappear soon, it will not affect the use. If the formation of the stability of the bubble will no longer disappear and produce emulsification deterioration, it will overflow in the tooth surface, damage the lubricating oil film, increased wear.
The selection principle of the reducer lubricating oil is the first factor of the choice of the lubricating oil. Viscosity is one of the most important physical and chemical indexes of gear oil. The appropriate speed reducer gear oil viscosity, can make the internal friction of lubricating oil is small, resulting in the gear surface wear and transmission noise, vibration, etc..
The lubricating oil viscosity is mainly realized by the base oil and viscosity index improver. The viscosity of lube base oil is related to molecular structure and molecular weight. On the basis of the oil, mineral oil based lubricants, including paraffin based crude oil refining of lubricating oil, naphthenic base oil refining lubricant and intermediate base crude oil refining three kinds of lubricating oil. The viscosity temperature of paraffin based crude oil is better than that of the other two. Good adhesive agent, not only requires high viscosity, good shear stability, but also requires good low temperature performance and thermal oxidation stability.