Lubricating oil for coal mill bearing shells
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The oil used for lubricating the coal mill bearing shells is currently 150-grade anti-wear hydraulic oil; is this appropriate? The technical specifications require the use of industrial gear oil grade 220; is it appropriate to use gear oil for lubricating the bearing shells? Please help analyze this.
The grade of lubricant to be used is determined based on the speed and load; it is fine to use gear oil for bearing shells. .
Coal mills are subject to low-to-moderate heavy loads, and gear oil possesses extreme pressure properties; it seems that gear oil would be a better choice. It’s best to consult the lubricant manufacturer
We are currently using grade 150 anti-wear hydraulic oil. Whether it will cause damage to the bearing shells.
Compared to 150 gear oil, 220 gear oil has a significantly higher viscosity. Viscosity affects the stiffness of the oil film as well as its load-bearing capacity; the higher the viscosity, the greater the stiffness and load-bearing ability. Therefore, I recommend using 220 gear oil. Of course, practice is the ultimate test of truth – if you use 150 gear oil and no issues such as high temperatures or wear occur in your bearing shells and gear pairs, then it is also acceptable. Whenever possible, we naturally choose lubricants that offer good value for money.
When selecting lubricating oil of the appropriate grade, it is necessary to take into account the mechanical loads on the mechanical components as well as the effects of temperature. In indoor environments in the north (during winter), without a dedicated oil heating system, oil with a viscosity of 220 will find it difficult to provide optimal lubrication and cooling effects; the appropriate choice depends on the conditions at your site and the technical requirements specified by the manufacturer of the grinder (gears)
The oil system heater starts automatically when the temperature drops below 20 degrees. Electric heater. In this way, the performance of 220#ckd should be guaranteed. What type of oil is commonly used in the lubrication systems for the coal grinding mills you use?
Our mills are located indoors (in the north), and both the reducers and the high/low pressure oil stations are equipped with heating systems that activate automatically when the oil temperature drops below 20 degrees. Gear oil with a viscosity of 150 is used in winter, while gear oil with a viscosity of 220 is used in summer