Under the conditions of high temperature and high pressure manufacturing, ordinary mineral hydraulic oils can easily cause fire and explosion accidents. Due to the combustion resistance of liquid oil, since the end of the World War II, it is first applied to the aircraft hydraulic system and gradually promoted to the civilian industry. Power plants, machinery processing and other industries to avoid degeneration accidents caused by using traditional mineral oil type hydraulic oil leaks.
The flame resistant hydraulic oil has the function of automatically extinguishing the flame, which can minimize the risk of fire and explosion when the oil and the flame or the hot surface are in contact with the flame or the hot surface. There are currently three commonly used combustion hydraulic oils: water-ethylene glycolic liquid liquid oil, fatty acid ester difficulty liquid pressure oil, and phosphate difficulty liquid pressure oil. The performance differences between these three kinds of flame resistance oil oil are as follows:
1. Fighting effect Water-Etanol Disdermal liquid pressure oil ＞ Phosphate Difficulty liquid voltage oil ＞ Fatty acid ester difficult liquid liquid pressure oil 2. Abrasion performance Phosphate Difficulty liquid pressure oil ＞ Fatty acid ester difficulty liquid pressure oil> Water-ethylene glycolic liquid liquid pressure oil 3. Price comparison Phosphate Difficulty liquid pressure oil ＞ Fatty acid ester difficulty liquid pressure oil> Water-ethylene glycolic liquid liquid pressure oil 4. Toxic comparison Phosphoricate is poisonous, while fatty acid ester is difficult to burn liquid oil and water-ethylene glycolic liquid liquid oil without obvious toxicity. 5. Symbol of the mineral type anti-abrasion liquid pressure oil 1) Phosphoricate is not mixed with hydraulic oil and mineral hydraulic oil. Therefore, in addition to reducing safety performance indicators such as flash point and spontaneous combustion point, the appearance of the oil products will also cause the appearance of the oil products to be turbid. In severe cases, there will be a layered phenomenon Essence Generally, the amount of mineral oil during operation is 4%.
2) Fatty acid lipids and liquid liquid pressure oil and mineral hydraulic oil can be dissolved in any proportion, and there will be no turbid appearance, layered and other phenomena. Generally, the amount of mineral oil during operation is 3%.
3) Water-ethylene glycol and mineral hydraulic oil cannot be mixed. 6. Compatibility with sealing parts 1) The compatibility of phosphate dystocia burning oil on conventional sealing parts is poor, and special sealing parts are required;
2) Fatty acid lipids are more compatible with conventional sealing oil, which is similar to the requirements of sealing parts as mineral hydraulic oil. In the system used in fatty acid fat burning liquid oil, it is recommended to use chip rubber, polytrafluoroethylene, and silicon rubber as sealing.
3) Water-ethylene glycol liquid liquid pressure oil is also compatible with conventional seals, which is similar to the requirements of sealing parts as mineral hydraulic oil. 7. The effect of water anti -liquid liquid pressure oil 1) Phosphoricate causing liquid liquid liquid oil and fatty acid esters can be hydrolyzed under the conditions of water. Therefore, the water content is required to be low. Generally, the water content of difficult liquid liquid oil in operation is ≯0.1%.
2) Water-ethylene glycol liquid liquid voltage oil and water can be mixed arbitrarily, but the entry of water will cause a significant decrease in exercise viscosity. 8. Others 1) Phosphoricate difficulty liquid voltage oil is currently only used in the speed control system of thermoelectric or nuclear power turbine.
2) At present, the combustion liquid-resistant oil from other industries outside the power plant basically uses fatty liquid liquid oil or water-ethylene glycolic liquid pressure oil.
3) Water-ethylene glycol liquid voltage pressure oil is generally used in the hydraulic system that is not too high and less important, because its abrasion resistance and rust resistance performance is relatively poor, which means that the life of the hydraulic pump will be relatively relative For short, the failure rate is relatively high, and the reliability of operation is relatively low.
