Attention should be paid to the selection of lubricating oil for mining machinery and equipment 

Mechanical equipment can not run without bearing, but want the equipment long-term stable operation, it is necessary to the bearing and other parts of the equipment in time to add lubricating oil. So what should be paid attention to in selecting lubricating oil for mining machinery and equipment?.

First, what is lubricating oil and what is its function?

Lubricating oil is generally composed of two parts: base oil and additives. Base oil is the main component of lubricating oil, which decides the basic properties of lubricating oil, and the additive can make up and improve the performance of the lack of base oil, give some new properties, is an important part of lubricating oil.

The use of lubricating oil is to reduce the friction resistance of parts surface, to improve the efficiency of machine operation, to avoid excessive wear of parts, extend the service life of equipment. In addition, the lubricating oil can also help reduce the heat, mechanical working surface temperature, viscosity and elasticity can buffer the impact and vibration of lubricating oil, anti rust and antifouling and take away the surface contamination and mechanical wear particles. In short, the rational use of good performance lubricants is an important guarantee for the normal and effective work of mechanical equipment, or an effective way to extend the service life of the equipment.

Two, according to the specific equipment use environment and performance requirements, choose the right lubricating oil.

According to the 1. China mining machinery and equipment operating environment and mode of production, mining equipment in long time continuous operation, operation cycle is longer, therefore, lubricating oil long time at high temperature, which requires the lubricating oil has good thermal stability and oxidation resistance.

The operations of the 2. mining equipment to harsh environment, dust, rock dust, water more, lubricating oil often vulnerable to these impurities, which requires lubricating oil corrosion, anti emulsification, good antirust property, the pollution by impurities, lubricating oil to ensure its performance does not change very much. In other words, it requires that lubricants have less sensitivity to contamination.

3. mine equipment are mostly in the open-air homework, winter and summer temperature change is relatively large, but the equipment to normal operation, which requires the oil viscosity we choose not change when the temperature changes, it is necessary to avoid the high temperature lubricating oil viscosity is too low can not form a lubricating effect of lubricating film, but also to avoid the startup viscosity at low temperature is too high and difficult operation.

4. requirements of lubricants to the adaptability of the seal is better, so as to avoid damage to the seal.

5. when the load and surface pressure of the friction pair are relatively large, the lubricating oil with relatively large viscosity should be chosen, the main reason is to make the lubricant difficult to squeeze from the friction surface. In order to lubricate the oil well on the surface of the parts, the lubricating oil with lower viscosity should be chosen when the friction surface is light and the pressure is small.

6. high speed running parts, should choose less viscous lubricating oil, can reduce the oil viscosity resistance caused by the power loss and calorific value; low speed parts can choose the viscosity of the larger lubricating oil.

7. when the working environment temperature of mine equipment is high, the lubricating oil with higher viscosity should be chosen, because the viscosity of lubricating oil will decrease with the increase of temperature. When the working temperature is low, the lubricating oil with smaller viscosity is selected.

8. when the equipment working environment humidity, the presence of water or corrosive media, because these impurities may be mixed with the lubricating oil in the lubricating oil deterioration or put away, in addition to the use of sealing device, selection of lubricating oil should be anti-oxidation, anti-corrosion and anti rust emulsion abilities in oil well.