Nine misunderstandings in the selection and use of air compressor lubricants

Good lubrication will give full play to the overall efficiency of the air compressor unit in operation, improve equipment efficiency, ensure production quality, and reduce maintenance costs and downtime, which is of inestimable significance. But the actual situation is that the lubricating oil selected by each unit may not be suitable for its own working conditions. This is not as good as the user's lack of understanding in the choice and use of lubricating oil, and there is fluke and carelessness. Such an example is an indisputable fact that is ubiquitous in units of different manufacturers. When a maintenance worker faces a unit shutdown due to improper use of oil, he often feels helpless. The unit has been shut down for a long time, maintenance is difficult, and more serious unit damage may occur. We are now discussing several common misunderstandings in the work, so that everyone can choose regular lubricants and do a good job in the lubrication of the unit.

   Misunderstanding 1: Unit lubrication is to refuel

Lubrication itself is a very profound theoretical subject. At present, few people can fully explain this field. It is comprehensive. It uses basic theories such as fluid mechanics, solid mechanics, materials science, applied mathematics, and physical chemistry to study The principle, material and method of lubrication are a modern science to control harmful friction and wear. Refueling is only a small part of equipment lubrication, such as an air compressor. The lubrication process is involved in the entire life cycle from the design stage of the unit to the unit's use, maintenance, and scrapping. When lubricating oil is added between the two frictional gear surfaces, an oil film is formed to avoid direct contact between the friction surfaces of the gears and reduce wear. However, considering that the lubricating oil also has some side effects, it is necessary to control the refueling amount of the unit. For example: piston unit, the temperature is low in winter, the viscosity of the lubricating oil before starting up, more lubricating oil will make the oil temperature rise slowly, low oil temperature, increase the resistance when the unit rotates, the viscosity is relatively large, and increase the motor starting torque . Therefore, it is stipulated that in general, it is only necessary to fill the lubricant between 1/3 and 2/3 of the scale line of the lubricant.

  Misunderstanding 2: Lubricants can be replaced with each other

  Each equipment unit is different in the type, brand and raw material of the lubricating oil used by different manufacturers according to the equipment working conditions, working environment, friction surface, specific characteristics of the selected material performance and different design lubrication methods. For example: high speed, need to be easy to form a strong oil wedge, low viscosity lubricating oil when selecting oil; the friction surface of the unit has a large load per unit area, and the lubricating oil with high viscosity and good oiliness should be selected; the work of the unit When the ambient temperature is high, you should choose a lubricating oil with a higher viscosity, a higher flash point, and a stronger stability, or a lubricating oil with a higher dropping point, such as Atlas units. The smaller the gap between the friction surfaces of the unit head, the lower the lubrication viscosity 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; when the unit is operating normally, the oil The temperature is generally higher up to about 100 ℃, then you should choose a higher viscosity lubricating oil, such as Feihe. Lubricating oil cannot be replaced under normal circumstances. If it is replaced at will, it will cause the equipment lubrication environment to fail, damage the friction surface of the unit, and cause damage to the machine head. It is a pity that each manufacturer declares that its lubricants are irreplaceable, but the actual physical and chemical indicators of lubricants are never made public, which creates a sense of confusion and mystery for customers. This is a commercial secret and will not be repeated here.

Nine misunderstandings in the selection and use of air compressor lubricants

   Misunderstanding 5: The more oil, the better

  Less lubricating oil will cause insufficient lubrication, poor lubrication, and mechanical accidents. Therefore, it is a misunderstanding to fear that the amount of oil is insufficient when adding more oil. In fact, the amount of lubricating oil must be appropriate, too much will increase the resistance of the unit, increase the drive power consumption of the unit, and the lubrication parts are easy to overheat and cause the deterioration of the lubricating oil. The oil produces bubbles, emulsification and leakage, resulting in poor lubrication. , Shorten the service life of the unit. Of course, too little lubricating oil will not achieve the lubrication effect and will damage the unit.

  Misunderstanding 6: The higher viscosity oil is better than the lower viscosity oil

The selection of high viscosity grade of lubricating oil will cause poor pumping performance of the oil pump, reduced flow, and deterioration of its lubricating performance, washing performance, and cooling and heat dissipation performance. It is easy to cause semi-dry friction in the required lubrication mechanism and cause the piston unit Mechanical accidents such as burnt tiles, shaft holding, and damage to crank connecting rods.

Nine misunderstandings in the selection and use of air compressor lubricants

   Misunderstanding 9: Oil with high price is good oil

   Some people think that the high price must be a good oil, and it must be easy to use. For this argument, we must look at it from two aspects. At first glance, for example, if the price of the lubricant selected by Party A is higher than that of Party B, its selling price will be higher than Party B's, and the price will be higher to users, but the quality of the oil may not be better than Party B's. Second, the choice of oil is not based on which oil has the best performance, but on whether the lubricating oil is suitable for working conditions. There are oil products suitable for working conditions, and choosing a low-priced oil can save the company's cost.

   In short, lubrication is the guarantee for the normal operation of all mechanical equipment. Depending on the brand and model of the air compressor, the operating conditions and environment of the unit should be comprehensively considered in the selection and use of the air compressor. The key is for the user to check this.