What are the lubrication methods for gears?

Lubrication plays a decisive role in the normal operation and service life of gear drives. The lubrication and cooling of the lubricant in the gear transmission ensures the normal operation of the gear at a certain working temperature and prolongs the service life of the gear.

Boundary lubrication: the surface of the meshing tooth is isolated by oil film, the oil film between the meshing tooth surface is not strong enough, the activity is poor, and it is not enough to adhere to stable elastic fluid lubrication, mainly relying on the chemical reaction film and physical adsorption film formed by the lubricating oil additive on the metal surface. Extremely limited loads, speeds, temperatures and time in boundary lubrication are prone to wear, leading to gear failure.

Elastic fluid lubrication: Because there is a certain strength of elastic activity lubricant between the surface of the two gears, the meshing surface is completely separated, so that the motion conflict of the two conflicting surfaces enters the internal conflict of the fluid, takes away the heat of movement in time, bears a certain load at a certain speed, and achieves the normal operation of the gear and the lubrication state of the desire.

Hybrid lubrication: A common condition in gear transmissions. Transmission elastic film dynamic lubrication mainly remains on the surface of the gear teeth meshing teeth, boundary lubrication and dry conflict.

The above are commonly used gear lubrication methods. Since the lubricant forms a lubricating elastic oil film of a certain strength between the meshing surfaces of the gears, the meshing surface is separated, and the extreme pressure additives in the lubricant form a chemical reaction film with the metal surface to cope with any boundary state, so the separation between the gears is adhered to to achieve the purpose of eliminating wear.

Therefore, the lubricant that maintains normal gear operation needs to have excellent extreme pressure wear resistance, good lubrication function, appropriate viscosity, excellent mobility and heat dissipation, certain anti-rust and anti-corrosion functions, excellent anti-emulsification function and the lowest possible transmission sound. Gear lubrication is very helpful in reducing noise and extending gear life.