What is the best viscosity index for high temperature chain oil?
October 12, 2022
The chain machine is a common transmission machine in industrial production. For example, the household appliances that have just been painted (painted) must pass through the drying tunnel to be dried and shaped while traveling. Chain machines are used in a wide range of applications, including transportation, agriculture, mining, food, painting of mechanical parts, textile setting, stretch tenter, building materials and many other aspects. The chain machine runs smoothly and the chain links are flexible and free, relying on good lubrication.
The lubrication system of the chain regularly and quantitatively fills the chain oil into the gap between the pin shaft and the sleeve of the chain, so as to produce a lubrication effect and reduce the consumption of lubricating oil as much as possible. Most of the working environment temperature of chain machine is at high temperature, from less than 150℃ to more than 300℃. Therefore, most of the chain oil is high temperature chain oil. 1. Classification of high temperature chain oil 1. Mineral oil type and semi-synthetic chain oil: Mineral oil and PAO are prepared into Base Oil in an appropriate ratio, and functional additives are added. The applicable temperature is less than 150℃. 2. PAO type high temperature chain oil: PAO is used as the base oil, a small amount of ester oil is added as a solubilizer, a small amount of polybutene is used as a tackifier, and an appropriate amount of functional additives is prepared. The applicable temperature is less than 150℃. 3. polyether type high temperature chain oil: It is prepared by using ethylene oxide-propane oligomer as base oil and adding appropriate amount of antioxidants, rust inhibitors and other additives. The applicable temperature is 150～250℃. 4. Ester high temperature chain oil: It is prepared with ester oil as the main base oil, with appropriate tackifiers and functional additives. The applicable temperature is 220～300℃. 5. Solid and semi-solid lubricating materials such as molybdenum disulfide are added. The applicable temperature can be higher than 260℃. Second, the use of high temperature chain oil It is suitable for heat setting machine and stretch tenter in textile printing and dyeing industry; chain drive system of high temperature drying room in building material industry; kiln wheel hub bearing in refractory factory; chain drive system of automobile and other paint drying rooms; drying room in cement factory Room support hub; paint line drying oven; other high temperature occasions. Third, the main technical indicators of high temperature chain oil (1) Viscosity index, greater than 100 or 150. (2) Kinematic viscosity at 40℃, 220mm2/s or 320mm2/S. (3) The acid value (neutralization value) is less than 0.25mgKOH/g, and some are more than 0.5mgKOH/g. (4) Flash point, greater than 240℃. ( 5 ) Evaporation loss (250℃, 1h), some oil products have this requirement, usually not more than 2.5%. Although high temperature chain oil is a small type of oil and has a relatively single use, it is by no means just any oil that can be used. Whether it is preparation or use, it must be paid attention to. There are many kinds of foreign chain oils, which are suitable for various occasions. Can refer to use.
