Answer: According to the characteristics of the air compressor structure, different methods can be used for lubrication. There are several situations:
(1) Pressure lubrication method. Use machinery (such as oil pumps, oil injectors) to automatically apply lubricating oil to the lubricating parts, also known as pressure lubrication method. This method is used in large and medium-sized compressors with crossheads.
(2) Splash lubrication method. The oil rod installed on the connecting rod splashes the oil to the various lubricating parts for lubrication, so the cylinder and the moving mechanism can only use the same lubricating oil. This method is mostly used in small compressors without crossheads. Its disadvantage is that the oil is difficult to filter and the oil level must be strictly controlled.
(3) Spray lubrication method. The sprayed oil mist follows the gas into the cylinder and other lubrication locations. For example, ultra-high pressure compressors, vane compressors and screw compressors all use oil spray lubrication.
(4) Drip oil lubrication method. Use oil cups and oil pipelines to deliver the lubricating oil to the parts that should be refueled, or add lubricating oil with an oil pot on time.
(5) Oil ring lubrication method. The rotating shaft drives the oil ring that is movably sleeved on the shaft, and the oil ring brings the oil in the oil pool into the bearing, entering the circulation lubrication.
