Atomically precise gears - Revision history

Apm: Category:Surprising facts

2026-03-29T20:33:42Z

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	[[Category:Far term target]]		[[Category:Far term target]]
			[[Category:Surprising facts]]

Apm: Category:Far term target

2026-03-29T19:42:08Z

Category:Far term target

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	* [[Generalized gears]]		* [[Generalized gears]]

			[[Category:Far term target]]

Apm: /* Meshing gears that act as pumps */ added note on PCP pumping not being pulsed in flow

2025-06-27T16:05:59Z

Meshing gears that act as pumps: added note on PCP pumping not being pulsed in flow

← Older revision		Revision as of 18:05, 27 June 2025
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	And these chambers can be used to pump gasses and liquids in a positive displacement pump fashion. <br>		And these chambers can be used to pump gasses and liquids in a positive displacement pump fashion. <br>
	Thus PCPs can act as vacuum pumps avoiding the need for high speeds as needed in turbomolecular pumps. <br>		Thus PCPs can act as vacuum pumps avoiding the need for high speeds as needed in turbomolecular pumps. <br>
	And compared to piston pumps the rotative reciprocative wobble is better compensatable and there are fewer parts.<br>		And compared to piston pumps …
			* the rotative reciprocative wobble is better compensatable and there are fewer parts.<br>
			* the pumping is not pulsed in flow but completely continuous despite the closed chambers 🤯.

	Vice-versa the pumped medium could actually act as coolant for the meshing pair being used as a gearbox. <br>		Vice-versa the pumped medium could actually act as coolant for the meshing pair being used as a gearbox. <br>

Apm: /* Classical gear tooth profile approximating gears */ moved headline to correct place

2025-06-27T15:48:58Z

Classical gear tooth profile approximating gears: moved headline to correct place

Apm: basic page

2025-06-27T15:48:01Z

basic page

New page

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= Types of atomically precise gears =

== Single atomic row gears ==

This has been modeled and MD simulated with rows of sulfur atoms as teeth. 
See page: [[Examples_of_diamondoid_molecular_machine_elements#Gearbox]]

Suspicion: When heavily overloaded things might bend ans teeth may slip. 
Likely no damage beside loss of position reference (loss of [[machine phase]] information). 
Thus merely a need for re-homeing. 

== Multi atomic row gears ==

Multiple rows deep. 
Smooth & precise running may be difficult to guarantee. 
Case to case analysis needed. 

Especially if the base axle is not high rotational symmetry by some [[means of structural bending]]. 
([[strained shell structure]] or [[by bond topology bent structure]] or [[by atom size bent structure]]) 
but is rather low symmetry, and the teeth work off from that low symmetry 
then the resulting structure can become very crude. 
A bit like old wooden interlocking peg transitions in wheat mills. 
This is probably not desirable in good well designed systems. 

== Classical gear tooth profile approximating gears ==

[[Quasi amorphous structure]]s can approximate classical hear teeth profiles (evolvents, cycloids) a bit larger scales. 
In some cases [[graphene sheet lining]] may be an option to get more smooth outer surfaces. 
It may introduce flex between tack on points though. 
As of 2025 no one has tried to even theoretically model such things yet.

Related are [[Progressing cavity pump]]s (PCPs) as … 
* PCPs too will need [[quasi amorphous structure]]s and 
* PCPs feature full and unbroken cycloid profiles.

=== Meshing gears that act as pumps ===

PCPs are basically helical gear pairs with a spur gear running in a ring gear with one more tooth. 
These meshing gear design choice just happens to make closed progressing chambers with enough of helical twist. 
And these chambers can be used to pump gasses and liquids in a positive displacement pump fashion. 
Thus PCPs can act as vacuum pumps avoiding the need for high speeds as needed in turbomolecular pumps. 
And compared to piston pumps the rotative reciprocative wobble is better compensatable and there are fewer parts. 

Vice-versa the pumped medium could actually act as coolant for the meshing pair being used as a gearbox. 
Albeit duet to viscosity nos scaling well for the nanoscale this may be more reserved for at least microscale versions or bigger. 
Not so much for the nanoscale. 

= Related =

* [[Atomically precise bearings]]
* '''[[Periodic table of gearbearings]]'''
* '''[[Machine element]]s''', [[List of machine elements]]
----
* [[Friction in gem-gum technology]], [[Friction]]
* [[Superlubricity]]
* [[Mesoscale friction]]
----
* [[Absence of wear in atomically precise bearings]]
----
* [[Generalized gears]]

← Older revision		Revision as of 17:48, 27 June 2025
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	It may introduce flex between tack on points though. <br>		It may introduce flex between tack on points though. <br>
	As of 2025 no one has tried to even theoretically model such things yet.		As of 2025 no one has tried to even theoretically model such things yet.

			=== Meshing gears that act as pumps ===

	Related are [[Progressing cavity pump]]s (PCPs) as … <br>		Related are [[Progressing cavity pump]]s (PCPs) as … <br>
	* PCPs too will need [[quasi amorphous structure]]s and <br>		* PCPs too will need [[quasi amorphous structure]]s and <br>
	* PCPs feature full and unbroken cycloid profiles.		* PCPs feature full and unbroken cycloid profiles.

	~~=== Meshing gears that act as pumps ===~~

	PCPs are basically helical gear pairs with a spur gear running in a ring gear with one more tooth. <br>		PCPs are basically helical gear pairs with a spur gear running in a ring gear with one more tooth. <br>
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	Vice-versa the pumped medium could actually act as coolant for the meshing pair being used as a gearbox. <br>		Vice-versa the pumped medium could actually act as coolant for the meshing pair being used as a gearbox. <br>
	Albeit duet to viscosity nos scaling well for the nanoscale this may be more reserved for at least microscale versions or bigger. <br>		Albeit duet to viscosity nos scaling well for the nanoscale this may be more reserved for at least microscale versions or bigger. <br>
	Not so much for the nanoscale. <br>		Not so much for the nanoscale. <br>

	= Related =		= Related =