4.1 bearing grease quantity computation

Rolling bearing the lubrication oil amount depends to a great extent on bearing type, oil supply system design, lubricating oil type, and other factors. It is difficult to give a suitable for any situation, have extensive applicability of the simple formula. Has the function of automatic transmission oil bearing (such as Angle contact ball bearing) required more than the amount of oil does not have the oil to be automatic transmission function of bearing (such as double row cylindrical roller bearing) oil is needed. Especially when fast coefficient (n.d m) value is bigger, the more obvious difference (figure
 
3). Through a lot of experiments, the flow of Q of the rough calculation formula is as follows:
Figure 4 oil supply way
Q = WdB
Q--the flow of the type, mm3 / h
W-coefficient, 0.01 mm/h
D-bearing diameter, mm
B-bearing width, mm
However, the actual flow of the numerical basis to expand 4 ~ 20 times. In order to obtain the best lubrication effect, still need through the experiment to fix the flow of how much.

4.2 injection way design
For high speed rotating bearing, in order to have a reliable will lubricating oil into bearing internal, should be attached great importance to the oil supply methods (such as the nozzle form, such as installation position) design. Bearing lubrication method depends entirely on bearing types and distribution way (figure 4 a). As for bearings, best lubrication methods from side into the bearings for internal. The nozzle inner hole should be and flush, can't point to keep frame. Especially when bearing their own suck so difficult to determine the direction (such as in Angle contact ball bearing), lubricant must according to the above direction into the bearings inside. If the conditions permit, lubricating oil had better after a special nozzle before enter the bearings inside. Depends on the size of the bearing nozzle length, diameter of 0.5 ~ 1.0 mm. Also allows the lubricating oil to bearing outer ring is in (figure 4 b). In this case, to pay attention to see whether oil into the steel ball and formed between the outer pressure area. To double row bearing speaking, from the outer ring rolling lubricant must with having at the local spray into the bearings internal, with sufficient lubrication of bearing.
When bearing outside diameter between 150 ~ 280 mm, the need to add a nozzle.

In addition, in order to prevent the bottom sludge precipitation in bearing formation, the need to install a discharge tubing, the length is more than 5 mm.

In order to meet the modern machine tools for high-speed spindle lubrication system, at the request of oil, gas centralized lubricating system and various parameters for further detailed and accurate research. This is because: lubricating oil lubrication method, the type, quantity and bearing type, lubricated bearing configuration of factors such as the speed increase are bearing has decided to function.




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