By Pradeep K. Gupta (auth.)

ISBN-10: 1461252768

ISBN-13: 9781461252764

ISBN-10: 1461297672

ISBN-13: 9781461297673

In any rotating equipment method, the bearing has usually been a crit­ ical member of the whole approach, because it is the part that enables the relative movement among the desk bound and relocating components. looking on the applying, a couple of assorted bearing kinds were used, similar to oil-lubricated hydrodynamic bearings, gasoline bearings, magnetic suspensions, rolling aspect bearings, and so forth. Hydrodynamic bearings promises any wanted load help, yet they're constrained in stiffness and the linked energy loss might be really huge. fuel bearings are used for high-precision purposes the place the supported quite a bit are rather mild, bearing energy losses are very low, and the rotating speeds quite often excessive. For great­ precision parts the place no frictional dissipation or bearing energy loss should be tolerated, magnetic suspensions are hired; back, the weight help requisites are very low. Rolling point bearings were frequent for these purposes that require larger bearing versatility, because of the requisites for high-load and high-stiffness features, whereas permitting average strength loss and allowing variable speeds. A examine of the dynamic interplay of rolling components is, accordingly, the topic of this article. Texts masking the research and layout technique of rolling components are very restricted. striking works contain research of Stresses and Deflections (Jones, 1946, Vols. I and II), Ball and curler Bearings, Their conception, layout and alertness (Eschmann, Hasbargen, and Weigand, 1958), Ball and curler Bearing Engineering (Palmgren, 1959, third ed. ), complicated Bearing expertise (Bisson and Anderson, 1965), and Rolling Bearing research (Harris, 1966).

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Example text

If the geometric interaction implies a contact, the local deformations are considered to be elastic. With the above assumptions, the rolling element/cage interaction can be considered in three basic parts: (i) the determination of geometric interaction or minimum clearance between interacting elements, (ii) postulation of hydrodynamic models for prescribed clearances, and (iii) postulation of dry contact models in the case of contact. The geometric interaction or the minimum film is determined by the prescribed position vectors and geometry of the elements.

1 Rolling Element/Race Interactions Since the geometry of the bearing plays an important role in formulating the interaction between various elements, the considerations in ball and roller bearings will be discussed separately. 1 Ball/Race Interactions The generic approach outlined above is applied to the ball/race interaction in an angular-contact bearing to determine the geometry of contact, the normal contact load, and the tractive forces and moments. Geometric Considerations. The geometry of ball/race interaction is shown schematically in Figure 3-4.

The Y axis is not shown since the figure is drawn in the X-Z plane. a point 0 on the locus of the center of curvature of the roller corner, as shown in Figure 3-11. 49) Rolling Element/Race Interactions 43 Flange Frame \ Roller • Figure 3-11 Exaggerated view of roller corner and race flange interaction. where

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Advanced Dynamics of Rolling Elements by Pradeep K. Gupta (auth.)


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