Hello RG,
I just want to know if there are any hybrid bearings available? Particularly curious on aerostatic-roller type of hybrid bearing.
Combination bearings such as roller-ball bearing are already available; For example, https://www.gmb.jp/en/product/bearing/water_pump_bearing.html & https://bearing-needle.com/6combined-ball-roller-bearings-NKX-NKIA-NKIB-NKXR.htm.
By hybrid bearing I mean, bearings using two/more different friction reduction techniques for the intended purpose. Such as ball-aerostatic as mentioned above.
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Say, I need to use a bearing for turbocharger (TC) which is required to utilize ball bearing when the turbocharger starts (at lower RPM) and later when TC has reached a higher RPM (say 40k+ RPM) the bearing gradually switches from a ball/roller bearing to Aerostatic/Aerodynamic bearing.
Are there any such bearing available? or Are there people working in such technique?
Hybrid bearing, in my work, deals with the simultaneous actions of lubricant pressurization and hidrodynamic wedge (due to the existing excentricity between the journal and the shaft).
I have several works on this topic. You can check them in my profile. In addition, there is (or there was) a company named Bently pressurized bearings that used to manufacture them, yet applying a different approach compared to mine (in my view, they required too much lubricant flow to maintain stability and certain control).
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