How to choose the viscosity of the guide rail lubricant:
1. The viscosity of rail oil is only 32, 46, 68, 150, 220. The hydraulic rail oil shared with the hydraulic system has only one specification of No. 32, which is suitable for rated pressure below 7Mpa. If the sliding speed of the sliding table is less than 10m/min, and the rail load pressure is less than 70Kpa, use 68# rail oil.
2. If the guide rail load force is greater than 70Kpa, use 150#, if the main guide rail or surface pressure is greater than 400 Kpa, only use 220#, if the sliding table sliding speed is greater than 10m/min, only 32 and 68 can be used. 68# rail oil is reused, 32# is used for fast speed, 68# is used for slow speed, 68# is commonly used for most machinery and equipment, accounting for 90‰ of total sales
Viscosity is an important physical and chemical index of lubricating oil. It is of decisive significance for the classification, quality identification, and use of various lubricating oils. It is also an indispensable physical constant in the design and calculation process. The internal friction or internal resistance that appears between molecules when a substance in a liquid or semi-fluid state is subjected to an external force while flowing.
We are in line with international standards and use kinematic viscosity m2/s. The relationship between mm2/s commonly used in actual production is 1m2/S=106mm2/S (crude oil).
The degree to which the viscosity of lubricating oil changes with temperature is viscosity-temperature. Generally, when the temperature increases, the viscosity decreases, and when the temperature decreases, the viscosity increases. The viscosity ratio refers to the comparison of the oil measured at two specified temperatures. The ratio of kinematic viscosity at low temperature to kinematic viscosity at higher temperature. my country is in line with international ISO, using 40°C and 100°C. Viscosity index refers to the approximate quantitative value of the oil viscosity changing with temperature. A high viscosity index means that the oil changes little with temperature. The viscosity can be found through the table. What is the significance to the production and use of oil products?
(1) When the engine viscosity increases, it will affect the power. If the viscosity is too low, it will cause difficulty in starting and reduce the oil film support ability.
(2) Most lubricating oils are divided according to viscosity, which is a basis for choosing lubricating oil.
(3) High viscosity and poor cooling effect. Because the circulation speed is slow, the number of passes through the filter is few, and the washing effect is poor.
(4) The oil with low viscosity can easily break the oil film.
(5) The sealing effect is not good.
(6) Increase lubricant consumption.
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