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Design And Construction Of Mitchell Tilting Pad Apparatus
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1.3 APPLICATIONS AND USES
The Mitchell tilting pad apparatus is applicable in experiments which does not require;
1) Hydrostatic lubrication
2) Boundary lubrication
3) Solid lubrication
4) Elastohydrodynamic form of lubrication.
It
only finds its application useful in full film or fluid lubrications in
motion, in which there is a situation that the load carrying surfaces
of the bearing are separated by an adequate supply at all times of a
relatively thick film of lubricant, so as to prevent metal to metal
contact and that the stability thus obtained can be explained by the
laws of fluid mechanics. The Mitchell tilting pad is a Mechanical
Engineering apparatus with the above aims and objectives.
1.4 LIMITATIONS
The
Mitchell tilting pad apparatus is limited to use with the specified oil
viscosity (SAE20W/50) or Whitz oil which is typical automobile engine
oil. The Mitchell tilting pad apparatus is also limited to operation
when there is power failure or insufficient supply of power that drives
the electric motor, other limitations are stipulated below;
1) The use of lubricants that do not obey Newton’s law of viscous flow.
2) The use of compressible lubricants
3) Fluid pressure varying in the axial direction.
From
the limitations stated above, it is necessary to identify the Newton’s
viscous effect, which states that the shear stress in the fluid is
proportional to the rate of change of velocity with respect to ‘y’.
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