Lubricating oil can effectively reduce equipment wear, improve equipment operating efficiency, and save materials and energy. There are some precautions to understand when using lubricating oil in mechanical equipment, and avoiding these common misunderstandings will make daily maintenance of lubricating oil more effective.
1. Equipment lubrication means adding lubricating oil
Many enterprise equipment managers think that adding oil to the oil tanks and bearings of the equipment is enough. Equipment failure has nothing to do with the oil, so it does not matter what oil is used. As a result, mechanical oil is used in the gear box and the bearing box, and "butter" is added to the bearings.
Lubrication is not as simple as adding oil. It is a science that comprehensively uses basic theories such as fluid mechanics, solid mechanics, materials science, applied mathematics, and physical chemistry to study lubrication principles, lubricating materials and lubrication methods, and control harmful friction and wear. , Refueling is only one part of lubrication.
2. The more lubricating oil, the better
This is not the case. Simply put, the purpose of equipment lubrication is to form a thin oil film on the two friction surfaces to avoid direct contact between the friction surfaces, thereby reducing wear.
However, considering some side effects of adding lubricating oil, it is necessary to strictly control the amount of oil added. For example, in a reducer, in order to reduce the resistance of the gear movement and the temperature rise of the oil, the depth of the gear immersed in the oil is 1-2 teeth height. Appropriately, the amount of refueling at high speed should be less.
After the lubricating oil is added to the bearing, the heat generated during the distribution process is greater than the heat dissipated, and the bearing temperature rises. If the grease is overfilled, the resistance will increase when the bearing rotates and it will be difficult to dissipate heat, which will cause the bearing's operating temperature to be high. At the same time, the high operating temperature of the grease will shorten its service life. Care must be taken not to fill the bearing chamber completely, generally as long as 1/3 to 2/3 of the cavity is filled.
3. Lubricants can be used interchangeably
The choice of lubricating oil depends on the working conditions of the machine, the working environment, the specific characteristics of the friction surface and the different lubrication methods, and the type and brand of the lubricating oil selected are different.
For equipment with high speed and strong ability to form an oil wedge, lubricating oil with low viscosity should be selected; when the load per unit area of the friction surface of the equipment is large, lubricating oil with high viscosity and good oiliness should be selected.
When the working environment temperature of the equipment is high, lubricating oil with higher viscosity, higher flash point, better oiliness, and stronger stability or grease with higher dropping point should be used.
The smaller the gap between the friction surfaces of the equipment, the lower the viscosity of the lubricating oil should be; the rougher the friction surface, the greater the viscosity of the lubricating oil should be, and the smaller the working taper should be if the lubricating grease is selected; the oil temperature is higher in pressure cycle lubrication , Lubricating oil with higher viscosity should be used.
Lubricants for different equipment are selected strictly according to the above principles and experimental results. Under normal circumstances, it cannot be replaced. If it is replaced arbitrarily, it will destroy the lubrication environment of the equipment, cause the equipment to wear and tear, and cause economic losses.
4. Lubricants can be mixed
Lubricants are refined petroleum products extracted from petroleum. Different types and brands of lubricants contain different ingredients and their proportions.
Generally speaking, lubricants should not be mixed. In order to improve the physical and chemical properties of lubricating oil, a certain amount of additives must be added to the lubricating oil.
The additives of various lubricating oils are different. There are antioxidants, tackifiers, oily additives and extreme pressure additives. When different types and different brands of lubricating oils are mixed together, the additives in the oil may react chemically. , Thus losing the role of additives, impairing the lubricating oil's due effect.
The correct use of lubricating oil and the rational and scientific work of lubricating oil can ensure the normal and safe operation of the equipment and effectively improve production and economic benefits.
