Comparison of fluid lubricated bearings and oil bearing

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First look at the connectivity porosity of approximately 20% (volume fraction), the effective permeability of about 10 × 10-1. m. Oily imported bearings working low pressure, high speed conditions, the leakage of the lubricating oil is very small, the film will not have to be thin, so primarily by fluid lubrication dominated. In such low-voltage, high-speed conditions. Oil bearing fluid lubricated bearings, and often when oil compared to conventional bearings, the friction coefficient is smaller. This is because the air in the voids generated in the upper portion of the inner diameter of the bearing is formed in the lubricating oil of the bubble, so that the lubricating oil apparent sticky decrease. bearing manufacturer
However, under conditions of high pressure, low speed, the phenomenon of lubricant leaks serious oil film thinner, adds boundary lubrication and solid contact friction, the friction coefficient rose sharply in the fluid lubrication region. Figure 6. For this phenomenon is the critical point. This critical point 6. Critical point c with the conventional bearing, compared to more biased in fa vor of the low-voltage, high-speed side. This is because for conventional imported bearings, the leakage of the lubricating oil only occur in the bearing opposite ends, for oil bearing, in addition to the opposite ends, the lubricating oil through the pores of the porous body will leak. Following visits connectivity larvae L porosity of about 30% (volume fraction), the effective permeability of about 100 × 10-1. m. Oil bearing II connectivity porosity is 1.5 times the oil bearing I is 1.5 times the oil content. However, the leakage of the lubricating oil is an effective permeability, i.e. the leakage of the lubricating oil of the oil bearing II compared to the oil bearing workers one order of magnitude higher. That is, for the oil bearing II, maintaining the thickness of the oil film and the lubrication performance is more difficult, and therefore its critical point: more biased towards the low-voltage, high-speed side. engine bearings

The larvae L gap of imports bearing the body of the two oil bearing containing lubricants, however, it will not enter completely stop oil state. Therefore, even if it is more than the critical point of the I 6. And 6. Exceeds the critical point, with conventional bearings in ct c. Compared to the rise in its coefficient of friction is also relatively flat, the phenomenon does not occur easily "baked".