Difference between revisions of "Infinitesimal bearing"
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| + | With the availability of [[technology level III|Advanced atomically precise technology (APM)]] it no longer makes sense to build conventional roller-bearings in which macroscopic speed differences meet at nanoscale contacts. | ||
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| + | Instead advanced APM technology allows to build a '''new type of macroscopic bearings''' that spreads macroscopic speed differences over many layers (a passive mechanical [[metamaterial]]) such that at nanoscale contacts only nanoscale-typical speed differences remain. | ||
| + | Paired with the flawless gemstone surfaces of [[crystolecule|crystolecule gears]] those metamaterial bearings become for all practical purposes wear free. | ||
[[File:Infinitesimal-bearing-screencap.png|thumb|400px|A small demo stack of building blocks for a relative speed distributing metamaterial.]] | [[File:Infinitesimal-bearing-screencap.png|thumb|400px|A small demo stack of building blocks for a relative speed distributing metamaterial.]] | ||
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[[File:Three configurations of infinitesimal bearing metamaterial.gif|frame|right|Different configrations (end to end connections) of infinitesimal bearing metamaterial can produce different types of bearings]] | [[File:Three configurations of infinitesimal bearing metamaterial.gif|frame|right|Different configrations (end to end connections) of infinitesimal bearing metamaterial can produce different types of bearings]] | ||
| − | To reduce the relative speed of two surfaces one | + | To reduce the relative speed of two surfaces one can stack many layers with minimal thickness onto each other. Each of those layers is un-percievably small - thus "infinitesimal" in the name. The layers are just thick enough to accommodate the necessary nano-mechanics. These nanomechanics are [[diamondoid molecular elements|DMME]] gears (not bearings) and further structure that makes sure that every layer takes the same part of the total speed difference. Note that due to [[superlubrication]] a single layer can take well perceivable macroscopic speeds without being destroyed thus bearings replacing todays macroscopic ones will need to use only a very thin stack of infinitesimal bearing layers. Since there's no static friction and very low speed dependent dynamic friction in diamondoid nanomechanics (see [[superlubrication]]) the bearings efficiency can be expected to be exceptional. |
| − | It is '''to investigate''' how a macroscopic infinitesimal bearing | + | It is still '''to investigate''' how a macroscopic infinitesimal bearing will perform relative to nanoscopic [[diamondoid molecular elements|DMME]] bearing and for a more intuitive feel for the performance how long an infinitesimal brearing of certain size would turn till it e.g. reaches half its initial speed. |
As in all products of advanced nanosystems the nanomechanics must (through their structure) provide some redundancy making the design more complicated <br>'''[TODO add more detailed Model]''' | As in all products of advanced nanosystems the nanomechanics must (through their structure) provide some redundancy making the design more complicated <br>'''[TODO add more detailed Model]''' | ||
Revision as of 16:08, 1 August 2016
With the availability of Advanced atomically precise technology (APM) it no longer makes sense to build conventional roller-bearings in which macroscopic speed differences meet at nanoscale contacts.
Instead advanced APM technology allows to build a new type of macroscopic bearings that spreads macroscopic speed differences over many layers (a passive mechanical metamaterial) such that at nanoscale contacts only nanoscale-typical speed differences remain. Paired with the flawless gemstone surfaces of crystolecule gears those metamaterial bearings become for all practical purposes wear free.
To reduce the relative speed of two surfaces one can stack many layers with minimal thickness onto each other. Each of those layers is un-percievably small - thus "infinitesimal" in the name. The layers are just thick enough to accommodate the necessary nano-mechanics. These nanomechanics are DMME gears (not bearings) and further structure that makes sure that every layer takes the same part of the total speed difference. Note that due to superlubrication a single layer can take well perceivable macroscopic speeds without being destroyed thus bearings replacing todays macroscopic ones will need to use only a very thin stack of infinitesimal bearing layers. Since there's no static friction and very low speed dependent dynamic friction in diamondoid nanomechanics (see superlubrication) the bearings efficiency can be expected to be exceptional.
It is still to investigate how a macroscopic infinitesimal bearing will perform relative to nanoscopic DMME bearing and for a more intuitive feel for the performance how long an infinitesimal brearing of certain size would turn till it e.g. reaches half its initial speed.
As in all products of advanced nanosystems the nanomechanics must (through their structure) provide some redundancy making the design more complicated
[TODO add more detailed Model]
[TODO: design a makro model structure for demonstration]
Contents
Cheating on a scaling law
When the total speed difference that the bearing is supporting is kept constant the power dissipation per volume scales with size:
- linearly with mono-layer sleeve bearings (note that here the whole power dissipation is concentrated on a single layer in the considered volume)
- quadratic with infinitesimal bearings
[todo: add the math]
Scaling only one dimension (bearing thickness)
Doubling the number of layers
- halves the speed which quaters the dynamic friction (P ~ v2) (v->v/2 => P->P/4)
- doubles the surface area which doubles friction (P ~ A) (A->2A => P-> 2P)
- thus in combination it halves friction (v->v/2 && A->2A => P->P/2)
Related AP metamaterials
Adding chemomechanical or electromechanical motors into the layers changes it into an interfacial drive (an active metamaterial). There the add-up of layer movement acts as one of the methods to accumulate nano motion to macroscopic levels (mechanical macroscopification).
