What is Tapered land thrust bearing?

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Discussion Overview

The discussion centers around the concept of tapered land thrust bearings, particularly in relation to their definition, functionality, and comparison to tilting pad bearings. Participants explore the technical aspects and historical context of these bearings, as well as their applications in engineering.

Discussion Character

  • Technical explanation
  • Conceptual clarification
  • Historical

Main Points Raised

  • One participant seeks a layman's definition of tapered land thrust bearings and asks how they differ from tilting pad bearings.
  • Another suggests contacting the Pioneer thrust bearing company for authoritative information on the term.
  • A participant mentions the tapered roller bearing developed by Timken as a good compromise depending on axial and radial load demands, providing a link to a primer on taper bearings.
  • Several participants describe tapered land thrust bearings as hydrodynamic bearings that resemble plain multi-pad thrust bearings but feature sloped thrust pads, which enhance load carrying capacity and vibration damping characteristics.
  • It is noted that tapered land thrust bearings are typically used in one direction of rotation, although bi-directional versions exist with some compromise on load capacity.
  • Historical context is provided, indicating that tapered land thrust bearings were invented in the early 1900s to improve the oil-wedge principle in thrust bearings and were widely used by 1914 in large ships for propeller shaft thrust.

Areas of Agreement / Disagreement

Participants present various viewpoints and technical details about tapered land thrust bearings, but there is no consensus on a single definition or comparison with tilting pad bearings. The discussion remains open with multiple perspectives on the topic.

Contextual Notes

Some limitations include the potential for varying definitions of terms and the dependence on specific engineering contexts, which may not be fully addressed in the discussion.

Martin Skkinner
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I came across the word Tapered land Thrust bearing while reading about Babbitt bearing manufacturing. Can anyone help me with a layman's definition? How is it different from tilting pad?
 
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I think you should ask the Pioneer thrust bearing company. They are the ones who wrote that term.
 
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A tapered land thrust bearing is a hydrodynamic bearing resembling a plain multi pad thrust bearing but with the thrust pads sloped off slightly .

The sloping off allows controlled geometry hydrodynamic wedges to form at each pad thus improving the load carrying capacity compared to a plain pad version of the same nominal size . Also gives improved vibration damping characteristics .

Most commonly used in one direction of rotation situations . Bi-directional ones can be made but load carrying capacity is then compromised a little .

They work particularly well in moderate load / high speed applications such as turbines .
 
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Nidum said:
A tapered land thrust bearing is a hydrodynamic bearing resembling a plain multi pad thrust bearing but with the thrust pads sloped off slightly .

The sloping off allows controlled geometry hydrodynamic wedges to form at each pad thus improving the load carrying capacity compared to a plain pad version of the same nominal size . Also gives improved vibration damping characteristics .

Most commonly used in one direction of rotation situations . Bi-directional ones can be made but load carrying capacity is then compromised a little .

They work particularly well in moderate load / high speed applications such as turbines .
Thanks a lot :)
 
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