Light bearing base structure

The invention relates to a light bearing base structure capable of being applied to such fields as ground gas turbines and aircraft engines; and the structure can realize lubricating oil supply of bearing cavities, lubricating oil returning, cooling gas supply and ventilation between the bearing cavities. The light bearing base structure is provided with a discrete convex rib structure for realizing such functions as lubricating oil supply, lubricating oil returning and cooling gas supply, is provided with a kidney-shaped or shape-optimized cavity structure for realizing such functions as ventilation between the bearing cavities, and is provided with a flange mounting edge and an O-shaped ring mounting groove for realizing a function of sealing lubricating oil in the bearing cavities. The light bearing base structure can relieve the weight of an engine to the greatest extent, optimizes internal space utilization of the engine, and shortens an air way of a secondary air system of the engine; and lubricating oil supply and cold air supply in the bearing base both can realize effective control of the temperature of the lubricating oil in the bearing cavities.