The difference between oil-free and oil-free lubrication

Fully oil-free and oil-free lubrication differ mainly in concept and field of application.

Conceptually: completely oil-free means that in machinery or equipment, the original intention is to use no lubricating oil or grease at all. However, in actual operation, the surface of the parts may form an oxide film or be lubricated by gas containing lubricant molecules, so not all moving parts and friction surfaces are in a completely unlubricated state. This design usually has high requirements for material selection and processing accuracy to ensure that it can work normally without significant liquid lubrication. Oil-free lubrication is a specific lubrication method. It uses solid lubricants, coatings, surface treatments and other technologies to achieve good lubrication between friction pairs without liquid oil film. This method is usually used in some special working environments, such as high temperature, low temperature, vacuum, radiation, etc., or applications with strict restrictions on lubricants.

Application field: oil-free design is often used in occasions with high requirements for cleanliness, such as food, medicine, semiconductor and other industries, as well as some special working environment, such as vacuum, high temperature and so on. In these situations, even a small amount of lubricating oil may cause pollution to the product or the environment. Oil-free lubrication is widely used in various mechanical equipment, especially those who can not or inconvenient to use liquid lubricating oil. For example, in some high-speed, high-temperature, heavy-duty bearings, the traditional lubricating oil may not be able to form a stable oil film, then it is necessary to use oil-free lubrication technology to ensure the normal operation of the bearing.

In the field of air compressors, all oil-free air compressors, such as all oil-free piston air compressors, usually refer to air compressors with dry operation in the cylinder. However, please note that this does not mean that the transmission mechanism is not lubricated at all. In fact, the transmission mechanism may be lubricated by lubricating oil circulation. The air compressor discharge gas clean, no need to increase the degreasing device, suitable for high gas quality requirements of the occasion, such as painting, lathe to step up the plant gas power source, as well as oxygen, nitrogen machine supporting equipment. Oil-free air compressor means that there is no direct participation of oil in the entire operation process, and special materials and technologies are usually used to ensure life and efficiency.

The above information is for reference only. If you need to know more about oil-free and oil-free lubrication, it is recommended to consult a mechanical expert or consult relevant literature.