Bearing smooth oil calculation and oil supply method

Source: China Bearing Network Time: 2018-07-09

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Bearing smooth oil quantity The amount of oil required to calculate the smoothness of a rolling bearing depends to a large extent on the bearing type, oil supply system depiction, smooth oil type, etc. It is difficult to give a suitable situation; simple and clear with wide applicability Formula. Bearings with active fluid 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 is When the value of (n.dm) is large; the difference is more significant. Through many tests; the approximate calculation formula of the fuel supply quantity Q is as follows: Oil supply method Q=WdB Type Q oil supply quantity; mm3/h
W coefficient; 0. 01mm / h
d bearing inner diameter; mm
B bearing width; mm However, the actual oil supply should be extended by 4 to 20 times based on this value. In order to obtain the best smoothing effect, it is necessary to test the amount of oil supply.
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. For single-row bearings; the best smoothing method is to enter the inside of 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 bearing) Smooth oil is necessary to enter the inside of the bearing in the above direction. 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. It is promised to send smooth oil to the outer ring of the bearing. In this case, it is necessary to observe whether the smooth oil can enter the pressure region formed between the steel ball and the outer ring. For double row bearings, it is necessary for smooth oil to Locally injected into the bearing inside the outer ring raceway; to make the bearing smooth and sleek. When the bearing outer diameter is between 150 and 280mm; add another nozzle. In addition; to avoid the bottom of the bearing Slag deposition; demand for a drain pipe; its length is greater than 5mm. In order to satisfy the demand for smooth system of high-speed spindle of modern machine tools; further detailed and accurate discussion on the parameters of the oil-gas gathering smooth system. : Smooth oil type, smooth method, smoothness and bearing type, bearing equipment and other factors have a decisive effect on the bearing speed.

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