How to manage the process of using industrial lubricants

Industrial lubricants include a wide range of lubricant varieties and practical applications. Its main varieties, such as steam turbine oil, bearing lubricating oil, hydraulic oil, gear oil, machine tool lubricating oil, grease, metalworking fluid, textile lubricating oil, quenching oil, heat transfer oil, electrical oil, refrigeration oil, rust proof oil, etc., are widely used in industry and are widely known.

The lubricant products used in most cases can be roughly divided into two categories, namely industrial machinery lubricants and industrial production process lubricants. The selection of lubricating oil is the primary step in the use of lubricating oil, and is the key to ensuring reasonable lubrication of equipment and fully utilizing the performance of lubricating oil.

（1） Selection of lubricating oil

1. The selection of lubricating oil should comprehensively consider the following three factors:

The working conditions (i.e. working conditions) of the mechanical equipment during actual use;

(2) Designation or recommendation of instructions from mechanical equipment manufacturers;

(3) Regulations or recommendations from lubricant manufacturers.

2. Selection of lubricating oil performance indicators

⑴ Viscosity

Viscosity is an indicator for the classification and grading of various lubricating oils, which has decisive significance for quality identification and determination. The viscosity of lubricating oil used for equipment is determined by consulting relevant charts based on design or calculation data.

Pour point

Pour point is an indirect indicator of the low-temperature fluidity of lubricating oil during storage, transportation, and use. Experience has shown that the operating temperature of general lubricants must be 5-10 ℃ higher than the pour point.

⑶ Flash point

The flash point is mainly a safety indicator for the storage, transportation, and use of lubricating oil, and also serves as an indicator for controlling the distillate and volatility of lubricating oil during production. The principle of specifying the flash point index of lubricating oil is to leave a safety factor of 1/2 according to safety regulations, which is 1/2 higher than the actual operating temperature. If the maximum oil temperature of the internal combustion engine oil pan does not exceed 120 ℃, the minimum flash point of the internal combustion engine oil is specified to be 180 ℃.

Selection of performance indicators

There are many performance indicators, and there are significant differences among different varieties. It should be reasonably determined based on the operating conditions of the equipment, the requirements of the manufacturer, and the description and introduction of the oil products. Strive to meet both lubrication technology requirements and economic rationality.

（2） Substitution of lubricating oil

1. Different types of lubricants have their own unique or different performance characteristics. Therefore, it is required to select lubricating oil correctly and reasonably, avoid substitution, and do not allow indiscriminate substitution.

2. Principles of lubricating oil substitution

Try to use the same type of oil or similar performance oil as a substitute.

⑵ The viscosity should be equivalent, and the viscosity of substitute oil should not exceed ± 15% of the original oil. Oil with slightly higher viscosity should be given priority for substitution.

⑶ Substitute high quality for low quality.

When selecting substitute oil, attention should also be paid to the environment and working temperature of the equipment.

（3） Mixing of lubricating oil

1. Different types of brands, manufacturers, and old and new oils should be avoided from mixing as much as possible. The following oil products are absolutely prohibited from being mixed.

Military special oils and specialized oils cannot be mixed with other oils.

Oil products with anti emulsification performance requirements shall not be mixed with oil products without anti emulsification requirements.

⑶ Ammonia resistant turbine oil shall not be mixed with other turbine oils.

(4) Anti wear hydraulic oil containing Zn should not be mixed with silver resistant hydraulic oil.

(5) gear oil shall not be mixed with worm gear oil.

2. The following situations can be mixed:

(1) Products of similar quality from the same manufacturer.

(2) Products of the same manufacturer and different brands.

⑶ Different types of oil products, if it is known that both components of the mixture do not contain additives.

(4) There are no abnormal phenomena or significant performance changes in the mixing test of different types of oil products.