Why can't the lubricating oil in the air compressor be replaced by hydraulic oil

Why can't the lubricating oil in the air compressor be replaced by hydraulic oil

Lubricating oil

　　Lubricant is a kind of lubricant. It is located between two objects in relative motion and has the function of reducing friction between two objects due to contact. In addition, it also has the functions of cooling, rust prevention, cleaning, sealing and buffering. The lubricating oil is divided into diesel engine lubricating oil and gasoline engine lubricating oil, they have different brands to choose from.

Hydraulic oil

　　Hydraulic oil is a hydraulic medium used in a hydraulic system that uses liquid pressure energy. It plays a role in energy transmission, anti-wear, system lubrication, anti-corrosion, rust prevention, cooling, and sealing in the hydraulic system. Hydraulic oil is a special oil that transmits pressure (power). It is divided into ordinary hydraulic oil, anti-wear hydraulic oil and low freezing point hydraulic oil. The construction machinery hydraulic oil is a special oil for hydraulic systems developed for the actual working environment requirements of construction machinery and die casting machines. Compared with other hydraulic oils, construction machinery hydraulic oils have better anti-wear, anti-rust and anti-emulsification properties. , Antioxidant stability, hydrolytic stability and thermal stability.

Same point

　　From the above explanation, we can see that lubricating oil and hydraulic oil also have the functions of anti-wear, cooling, anti-rust, cleaning, and sealing. And this is the main reason why we often hear some words about hydraulic oil can be used as lubricating oil.

　　 The main function is different

　　In the main function, lubricating oil and mechanical hydraulic oil are still different. The main function of lubricating oil is to reduce the damage caused by object friction to the machine; the main function of mechanical hydraulic oil is to transmit pressure (power).

　　The difference in focus

It is precisely because of their different main functions that lubricating oil pays more attention to reducing friction, slowing down wear and preventing metal sintering functions; while hydraulic oil pays more attention to viscosity index, which requires hydraulic oil to have good performance at high temperatures and ensure that at low temperatures Easy to flow and reduce energy consumption.

　　What are the hazards of using hydraulic oil as lubricating oil?

1 The viscosity of hydraulic oil is generally relatively small, and the viscosity of lubricating oil is generally relatively large. Therefore, when hydraulic oil is used as lubricating oil, the formation of oil film is more difficult, and this will easily lead to greater machine wear and even Bring more serious consequences.

2 　　Hydraulic oil and lubricating oil have different main functions. Therefore, the additives in them are also different. If the two oils are mixed, it will cause performance changes, and even chemical reactions will cause the oil to deteriorate, which will lead to greater machine wear.

　　3 　　The working temperature of the hydraulic system is not high, but the unit pressure transmitted by the hydraulic oil is very large. However, the operating temperature of the engine crankcase is very high, coupled with the intrusion of high-temperature and high-pressure gas in the combustion chamber, which will make the various functions of the hydraulic oil fail faster, resulting in increased wear and tear of the machine, and even greater losses in severe cases. .