What is the difference between lubricating oil and hydraulic oil?
Lubricating oil is one of the lubricants. It is located between two objects in relative motion and has a functional module to reduce the conflict caused by the contact between the two objects. In addition, it also has the functions of refrigeration, rust prevention, cleaning, sealing and buffering. The lubricating oils are diesel engine lubricating oil and gasoline engine lubricating oil respectively.
Hydraulic oil is the oil medium in the hydraulic system, which has the functions of transmission medium, lubrication and anti-wear, anti-corrosion and anti-rust, cooling and sealing. Hydraulic oil is one of the special oils for transmitting pressure (power). It is divided into ordinary hydraulic oil, anti-wear hydraulic oil and low freezing point hydraulic oil. The difference between lubricating oil and hydraulic oil. The same point can be seen from the above description, lubricating oil and hydraulic oil also have the functions of anti-wear, refrigeration, anti-rust, cleaning and sealing. This is also an important reason why hydraulic oil is used as lubricating oil.
In the key role, lubricating oil and hydraulic oil are different. The key role of lubricating oil is to reduce the obstacles caused by the collision of objects to the machine; the key role of hydraulic oil in construction machinery equipment is to transmit pressure (power). focus difference. Because of the difference in their key functions, lubricating oil pays more attention to reduce conflicts, ease wear, and avoid metal sintering functional modules, and hydraulic oil pays more attention to the viscosity coefficient, requiring hydraulic oil to perform well at high temperatures, easy to move at low temperatures, and reduce power costs. .
The dangers of hydraulic oil as lubricating oil
1. The viscosity of hydraulic oil is generally relatively small, while the viscosity of lubricating oil is generally relatively large, so when hydraulic oil is used as lubricating oil, it is relatively difficult to generate oil film, which is easy to cause relatively large machine wear and tear, even will have relatively serious consequences.
2. The additives inside the hydraulic oil and lubricating oil are different. Mixing the two oils will cause changes in function, and even chemical reactions will cause the oil to deteriorate, resulting in 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 working temperature of the engine crankcase is very high, coupled with the intrusion of high-temperature and high-pressure gas in the incineration chamber, the various functional modules of the hydraulic oil become ineffective faster, the machine wear increases, and serious people will cause greater losses.