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Bearing smooth oil supply method and oil quantity calculation
Source: Bearing network time: 2012-12-28
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B bearing width; mm
d bearing inner diameter; mm
However, the actual fuel supply should be extended by 4 to 20 times on the basis of this value. In order to obtain the best smoothing effect, it is necessary to test the amount of oil supply.
Bearings with active oil transmission (such as angular touch ball bearings) require more oil than bearings that do not have active fluid transmission (such as double row cylindrical roller bearings). Especially when the speed coefficient (n When the value of dm) is large; the difference is more significant. Through many tests; the formula for the fuel supply Q is as follows: Oil supply method Q=WdB where Q is the oil supply; mm3/h
W coefficient; 0. 01mm / h
The oil supply method depicts the bearing for high-speed rotation; in order to reliably feed the smooth oil into the bearing; the oil supply method (such as nozzle method, device orientation, etc.) should be taken seriously. The smooth bearing method depends entirely on the bearing type and equipment method. .
If the condition is agreed; the smooth oil is best passed through a special nozzle and then enters the inside of the bearing. The length of the nozzle depends on the bearing. This section is 0. 5 ~ 1. 0mm. Also promise to send smooth oil to the outer ring of the bearing.
For single-row bearings; the best smoothing method is to enter the bearing from one side. The nozzle hole should be flush with the inner ring; it can't be pointed to the cage. Especially when the bearing itself is not easy to keep in the direction of oil and discharge (such as angular touch ball bearings); It is necessary for smooth oil to enter the bearing inside in the above direction.
In this case; pay attention to observe whether the smooth oil can enter the pressure region formed between the steel ball and the outer ring. When the outer diameter of the bearing is between 150 and 280 mm; add a nozzle for the demand. For the double row bearing Slick oil needs to be sprayed into the bearing from the ground flush with the outer ring raceway; to make the bearing smooth and smooth.
In addition; in order to avoid the formation of oil slag deposits at the bottom of the bearing; the demand device is a drain pipe; its length is greater than 5mm. This is due to: smooth oil type, smooth method, smoothness and bearing type, bearing equipment and other factors have improved bearing speed Determining the role. In order to satisfy the demand of the high-speed spindle of modern machine tools for the smooth system; further detailed and accurate discussion on the parameters of the oil-gas gathering smooth system.
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