Difference between revisions of "Atomically precise bearings"
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* [[Friction in gem-gum technology]], [[Friction]] | * [[Friction in gem-gum technology]], [[Friction]] | ||
* [[Superlubricity]] | * [[Superlubricity]] | ||
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* [[Absence of wear in atomically precise bearings]] | * [[Absence of wear in atomically precise bearings]] | ||
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* '''[[Machine elements]]''' | * '''[[Machine elements]]''' | ||
Revision as of 10:27, 28 September 2022
Types of atomically precise bearings:
- Atomically precise slide bearings
- Atomically precise roller gearbearings
- Some form of alternative means for Levitation
Contents
Which type to pick
Which type to pick depends on:
- the requirements on friction
- the amount of available space
- the needed load bearing capability
Bearing interface volume
By far the least volume is taken up by atomically precise slide bearings.
Thus they seem to be a natural choice for in Molecular mills in assembly level 1 of
gem-gum factories and preceding systems like sorting rotors.
Smallest machinery is proposed to be run slow speeds like e.g. 1mm/s to ~5mm/s.
Thus (and because of the scaling law of higher throughput of smaller machinery) friction levels stay low.
Bearing friction
See main pages: Friction in gem-gum technology, Friction
Dynamic friction
Slide bearings experience dynamic friction which
- grows and shrinks quadratically with rising and shrinking speed respectively
- 1/10th the speed means 100th the friction => friction can be very low for low speeds
- 10x the speed means 100xthe friction => friction can also can get quite significant for moderate to higher speeds
Especially for higher speeds Atomically precise roller gearbearings might have quite a bit lower friction. For those having
- much slower relative motion (goes in quadratically)
- quite a bit less contact area (goes in linearly) - reduces load bearing capacity though
Static friction
Atomically precise can effectively reduce static friction to zero by having
the thermal equipartitioning energy kT much above
the remnant wavyness of the potential energy across turning angles .
For details see main page about: Superlubricity
Increased friction from high loads
...
Related
Sub-types:
- Atomically precise slide bearing
- Atomically precise roller gearbearing
lower friction for higher speeds but also bigger and perhaps more degradation susceptible
- Organizing many nanoscale bearings to bigger bearings in order to reduce friction: Infinitesimal bearings
