Analysis of the Influence of Grease Viscosity on IKO Rolling Mill Bearings

    The measure of internal friction during material activity is called viscosity. In order to prevent the contact surface between moving parts, the bearing lubricant must have sufficient viscosity, and the viscosity value decreases with increasing temperature. Viscosity is an important physical and chemical performance index for evaluating the quality of IKO bearing lubricants. It is of great significance for production, transportation and use.
Viscosity is the main technical index of bearing lubricants, but the viscosity of IKO bearing lubricants should not be higher than the degree that affects the start of the engine. Most bearing lubricants are classified according to their viscosity, and the viscosity is the oil of various equipment. mostly according. The measurement of viscosity is divided into two categories: absolute viscosity and relative viscosity. Absolute viscosity is divided into dynamic viscosity and kinematic viscosity; relative viscosity has several expressions such as Enshi viscosity, Sai's viscosity and Rayleigh viscosity.
The use of excessively large rolling mill bearing lubricants will increase the wear of the machine. In practical applications, the selection of lubricants of suitable viscosity will ensure that the mechanical equipment works normally and reliably. Generally, for low-speed and high-load applications, oils with higher viscosity are selected to ensure sufficient oil film thickness and normal lubrication. For high-speed and low-load applications, oils with lower viscosity are selected to ensure the normal starting of mechanical equipment. The running torque, the lubricating oil of the engine is too large, the activity is slow, the upstream is slow, and the oil pressure is high, but the lubricating oil passes through a small amount, and cannot be added to the friction surface in time, and the friction generated under the condition of continuous operation is the smallest.
    Because the rolling speed of the rolling mill bearing oil is slow, the number of passes through the bearing lubricating oil filter is small, and it is difficult to clean the worn metal chips, carbon particles and dust from the friction surface in time. In operation, because the viscosity of the lubricating oil is large, the friction between the friction surfaces of the parts increases, and in order to overcome the increased friction, the fuel is consumed more, and the output power of the engine is also reduced. IKO bearing lubricants have high viscosity, and the oil's cycle speed is slow. The cooling and heat dissipation effects are poor, which makes the engine overheat. The temperature rise is small so that an oil film can be formed between the moving parts at various operating temperatures.
Therefore, do not use excessively strong engine oil, let alone think that the viscosity is as high as possible. Under the premise of ensuring lubrication, depending on the temperature range at the time of use, use a lubricant with a small viscosity as much as possible. However, for the engine that has been worn to a serious degree and the gap has been relatively large, a lubricant having a slightly higher viscosity can be appropriately selected.
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