If a large amount of charge is accumulated in lubricating oil, electrostatic discharge will occur. In some cases, it may even cause electrostatic sparks, causing potential safety hazards, even combustion and explosion. Usually, electrostatic discharge (ESD) occurs in the filter element or fuel tank, causing slight cracks. If the static voltage is high, static electricity may occur several times in a row. Electrostatic discharge (ESD) is more likely to occur in large areas of contact between different materials. Because the filter element of lubricating oil uses more plastics, it is easy to generate static electricity when contacting with lubricating oil.
In electrostatic discharge, the instantaneous high temperature caused by electric spark can be close to 1000 C, which is dangerous if the oil itself is flammable. In addition, if the vapor of hydrocarbon mixture in crude oil reaches a certain concentration near the tank, there is also a risk of spontaneous combustion. Turbine oil and hydraulic oil also generate static electricity and discharge when circulating, but they usually go out soon.
How to prevent electrostatic problems in lubricating oil: If the lubricating system is prone to electrostatic problems, grounding is a commonly used method to eliminate electrostatic problems, but in some cases grounding may not be the solution. If grounding can't solve the problem of static electricity, here are four other ways to eliminate static electricity:
1. 采用防静电滤芯，材料制成，能及时导走静电，防止静电放电。2. 在施油的前提下，改用导电性较高的润滑油。然而，应该充分评估和避免石油替代的风险。
1. Anti-static filter element, made of material, can guide static electricity in time and prevent static discharge. 2. On the premise of oil application, the lubricant with higher conductivity should be used. However, the risk of oil substitution should be fully assessed and avoided.
3. Revamping the materials and combinations of parts and components of lubrication system, using materials that are not easy to generate static electricity, or avoiding the accumulation of static electricity. 4. Adjust flow rate and tank size to reduce friction of oil in circulating flow. Above is the introduction and preventive measures of electrostatic discharge of lubricating oil, hope to help you!