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Selection of industrial large fan gear lubricant

Update:14-02-2020
Summary:

In industrial large fan equipment, various types of lub […]

In industrial large fan equipment, various types of lubricating oil are widely used, including lubricating oil for connecting parts, lubricating oil for fan blades, and lubricating oil for reducer gears. Among them, gear oil is the most important because it directly affects The operation of large industrial fans. Over the years, due to improper selection of lubricating oil products, fan tooth surface failures often occur, so the amount of gear scrapped is quite large. Improper lubrication will increase the consumption of accessories, increase the operating cost, and cause losses to the party applying the fan. Reasonable selection of lubricants has important economic significance.

      In the gear transmission of industrial large fan motors, the meshing time of the two corresponding joint surfaces of the gears is very short, and slippage and rolling occur between the meshes. The effect of automatically forming a liquid oil film is very weak, and due to processing and assembly errors, the actual contact The area is very small, so the pressure per unit area is very large, resulting in high tooth surface angle stress. This stress is the source of tooth surface failure (abrasion of the tooth surface, pitting, corrugation, flaking). Whether the lubricant can separate the two contact tooth surfaces and play the role of an elastic medium, it is very important to protect the tooth surfaces.

      Tooth surface failure (also known as tooth distortion) reduces the smoothness of transmission, increases vibration and noise, accelerates tooth surface wear, and destroys the cycle in advance. As a result, users of industrial fans have to repair and replace motors in advance.

      In order to adapt to different contact stresses and protect the tooth surface of the gear from damage, in addition to improving the accuracy of the processing and assembly of the tooth surface, the lubricant must have sufficient load capacity, that is, wear resistance and extreme pressure resistance. Load capacity is the most important basic performance of gear lubricants. How to make gear lubricants have this performance? This depends on additives to achieve this requirement. At present, additives that can increase the load capacity of lubricating oil are mainly sulfide, phosphide, chloride, boride, lead soap, and the like. Among them, sulfide and phosphide are currently the most common additives. When the above additives and auxiliary additives are added to the lubricating oil, it can play the following roles in gear lubrication:

      (1) Prevent or reduce the wear of gears and related moving parts;

      (2) Reduce friction and power loss;

      (3) Reduce noise, vibration and impact between gears;

      (4) Prevent corrosion and rust

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