Factors affecting open gear lubricants

The working condition characteristics of the open gear lubricating oil determine that the lubricant used must have good adhesion performance, extreme pressure anti-wear performance, impact load resistance, and can resist high temperature and water erosion depending on specific operating conditions and environmental requirements. Strong sealing, low dust effect, spray performance, flow performance, no heavy metals and substances that may damage the environment and human body. It can be summarized as follows:
1. Open gear lubricating oil has strong adhesion (good adhesion, not easy to fall and loss), and has a certain oil film strength (can reduce the impact of impact load on the tooth surface)
2. Open gear lubricants with high wear and extreme pressure resistance (FZG test level ≥ 12, four ball welding load > 650KG)
3. Open gear lubricants contain a certain proportion of solid additives and EP (anti-extreme pressure) additives (for boundary lubrication and emergency lubrication requirements)
4. Open gear lubricants have good spray (spray system) or flow properties (oil pool lubrication) / wide operating temperature range (for winter and summer)
5. The open gear lubricating oil has good physical and chemical stability (long life, low loss, no deterioration, and thermal oxidation stability is especially important for open kiln gears)
6. Open gear lubricants have a certain degree of resistance to external environments (such as dust, water, etc.)
The earliest open gear lubricants were selected from the class of asphalt, followed by the development of pure oils, composite oils and adhesive greases.
Asphalt products are extracted from petroleum refining residue, usually with extreme pressure additives and solvents. They have high viscosity, and the oil film formed is relatively thick and can withstand high temperature. However, due to environmental protection and leakage, it is gradually becoming new. Replaced by open gear lubricants.
Pure oil products, whether mineral or synthetic, are usually added with extreme pressure additives. The base oil is highly viscous. Because the transparency is easy to observe the tooth surface, the sealing requirements are high and the leakage is not easy to handle.
Adhesive grease is a thickening base oil with a thickening agent, and is equipped with extreme pressure additives and solid lubricants. It has excellent bearing capacity, oil film thickness, high temperature resistance and water resistance, excellent anti-wear performance and self-sealing property. It is easy to leak, easy to dynamically observe the distribution of tooth surface load and many other advantages, and has a dominant position in the market.
Choosing the right open gear lubricant is the first step to ensure that the equipment can be well lubricated. It is necessary to comprehensively consider the relevant factors according to the working conditions and design characteristics of the equipment before it can get an accurate judgment, mainly based on the load of the equipment. Temperature, environment, speed and lubrication method.