Fluid coupling - Revision history

Red marquis: /* Overview */

2009-08-25T15:59:30Z

Overview

← Older revision		Revision as of 15:59, 25 August 2009
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	**The other connected to the output shaft, known as the ''turbine'', ''output turbine'', ''secondary wheel''<ref name="gloss"/> or ''runner''		**The other connected to the output shaft, known as the ''turbine'', ''output turbine'', ''secondary wheel''<ref name="gloss"/> or ''runner''

	The driving turbine, known as the 'pump', (or ''driving torus''~~<ref group="note" name="gm">A [[General Motors Corporation\|General Motors]] term</ref>~~) is rotated by the prime mover, which is typically an [[internal combustion engine]] or [[electric motor]]. The impellor's motion imparts both outwards linear and rotational motion to the fluid.		The driving turbine, known as the 'pump', (or ''driving torus'') is rotated by the prime mover, which is typically an [[internal combustion engine]] or [[electric motor]]. The impellor's motion imparts both outwards linear and rotational motion to the fluid.

	The hydraulic fluid is directed by the 'pump' whose shape forces the flow in the direction of the 'output turbine' (or ''driven torus''~~<ref name="gm" group="note"/>~~). Here, any difference in the angular velocities of 'input stage' and 'output stage' result in a net force on the 'output turbine' causing a torque; thus causing it to rotate in the same direction as the pump.		The hydraulic fluid is directed by the 'pump' whose shape forces the flow in the direction of the 'output turbine' (or ''driven torus''). Here, any difference in the angular velocities of 'input stage' and 'output stage' result in a net force on the 'output turbine' causing a torque; thus causing it to rotate in the same direction as the pump.

	The motion of the fluid is effectively toroidal - travelling in one direction on paths that can be visualised as being on the surface of a torus:		The motion of the fluid is effectively toroidal - travelling in one direction on paths that can be visualised as being on the surface of a torus:

Red marquis at 15:58, 25 August 2009

2009-08-25T15:58:55Z

← Older revision		Revision as of 15:58, 25 August 2009
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	== History ==		== History ==
	The '''fluid coupling''' orginates from the work of Dr. Herman Fottinger~~<ref group="note">See also [http://de.wikipedia.org/wiki/Hermann_Föttinger\| German wikipedia page on Herman Fottinger]</ref>~~, who was the chief designer at the Vulcan Works in Stettin.<ref name="mjn">Light and heavy vehicle technology, Malcolm James Nunney, page 317. (Google books link: [http://books.google.co.uk/books?id=eL6TBaSnd78C&printsec=frontcover#PPA317,M1])</ref>. His patents from 1905 covered both fluid couplings and [[torque converter]]s.		The '''fluid coupling''' orginates from the work of Dr. Herman Fottinger, who was the chief designer at the Vulcan Works in Stettin.<ref name="mjn">Light and heavy vehicle technology, Malcolm James Nunney, page 317. (Google books link: [http://books.google.co.uk/books?id=eL6TBaSnd78C&printsec=frontcover#PPA317,M1])</ref>. His patents from 1905 covered both fluid couplings and [[torque converter]]s.

	In 1930 [[Harold Sinclair]], working with the [[Daimler\|Daimler company]], devised a transmission system using a fluid coupling and [[epicyclic gear\|planetary gearing]] for buses in an attempt to mitigate the lurching he had experienced while riding on London buses during the 1920s.<ref name="mjn"/>		In 1930 [[Harold Sinclair]], working with the [[Daimler\|Daimler company]], devised a transmission system using a fluid coupling and [[epicyclic gear\|planetary gearing]] for buses in an attempt to mitigate the lurching he had experienced while riding on London buses during the 1920s.<ref name="mjn"/>

Red marquis: /* References and notes */

2009-08-25T15:58:35Z

References and notes

← Older revision		Revision as of 15:58, 25 August 2009
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	* [[Torque converter]]		* [[Torque converter]]
	* [[Water brake]]		* [[Water brake]]

	~~==References and notes==~~
	~~===Notes===~~
	~~<references group="note"/>~~


	[[Category:Mechanical power transmission]]		[[Category:Mechanical power transmission]]
	[[Category:Automotive transmission technologies]]		[[Category:Automotive transmission technologies]]

Red marquis at 15:58, 25 August 2009

2009-08-25T15:58:19Z

← Older revision		Revision as of 15:58, 25 August 2009
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	===Notes===		===Notes===
	<references group="note"/>		<references group="note"/>
	~~===References===~~
	~~{{reflist}}~~

	[[Category:Mechanical power transmission]]		[[Category:Mechanical power transmission]]
	[[Category:Automotive transmission technologies]]		[[Category:Automotive transmission technologies]]

Red marquis at 15:57, 25 August 2009

2009-08-25T15:57:26Z

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-Typically an axial mounted enclosed circular housing mounted to an "output" shaft consisting of a "stator like" outer hollow doughnut with a separate, non-mechanically coupled, internal fan or turbine mounted to an input shaft and contained inside a viscous fluid or oil within the "doughnut" or stator.  The fluid coupler or torque converter then acts on the principal of turbulence and resistance created by the rotation of the fan inside the stator using the fluid or oil as a coupling medium to induce a torque to turn the stator.  The stator may not be designed to be smooth on the inside surface, but ridged or otherwise altered to harness, capture, or create increased turbulence with the fan.
+:''This article is about hydrodyamic fluid complings, for "hydroviscous fluid couplings" see [[Viscous coupling unit]].''
-The faster the fan turns, the more turbulence is created, which acts on the larger internal surface area of the stator to begin rotating it.
+A '''fluid coupling''' is a hydrodynamic device used to transmit rotating mechanical power.<ref name="dic">[http://encyclopedia2.thefreedictionary.com/Fluid+coupling Fluid coupling] ''encyclopedia2.thefreedictionary.com''</ref>  It has been used in [[automobile]] [[Transmission|transmission]]s as an alternative to a mechanical [[clutch]]. It also has widespread application in marine and industrial machine drives, where variable speed operation and/or controlled start-up without shock loading of the power transmission system is essential.
-The "fan" or turbulence inducing device within the "stator" may be more of a more simple, straight forward design, or it may be more complex consisting of gear multipliers, and rollers to increase or manipulate the turbulence curves and effects.
+== History ==
-In principal as RPMs are reduced, the less coupling between the inner fan and the outer stator allowing the input shaft to remain spinning, while the output shaft can be stationary in effect creating a hydraulic slippage clutch with no hard surfaces, belts, chains, or other solid devices to wear against each other, except bearings needed to hold the fan inside the stator, and to mount to the input and output shafts.
+In 1930 [[Harold Sinclair]], working with the [[Daimler|Daimler company]], devised a transmission system using a fluid coupling and [[epicyclic gear|planetary gearing]] for buses in an attempt to mitigate the lurching he had experienced while riding on London buses during the 1920s.<ref name="mjn"/>

192.234.148.250 at 06:59, 25 August 2009

2009-08-25T06:59:40Z

← Older revision		Revision as of 06:59, 25 August 2009
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	An axial mounted enclosed circular housing mounted to an "output" shaft~~, typically~~ consisting of a "stator like" outer hollow doughnut with a separate, non-mechanically coupled, internal fan or turbine mounted to an input shaft and contained inside a viscous fluid or oil within the "doughnut" or stator. The fluid coupler or torque converter then acts on the principal of turbulence and resistance created by the rotation of the fan inside the stator using the fluid or oil as a coupling medium to induce a torque to turn the stator.		Typically an axial mounted enclosed circular housing mounted to an "output" shaft consisting of a "stator like" outer hollow doughnut with a separate, non-mechanically coupled, internal fan or turbine mounted to an input shaft and contained inside a viscous fluid or oil within the "doughnut" or stator. The fluid coupler or torque converter then acts on the principal of turbulence and resistance created by the rotation of the fan inside the stator using the fluid or oil as a coupling medium to induce a torque to turn the stator. The stator may not be designed to be smooth on the inside surface, but ridged or otherwise altered to harness, capture, or create increased turbulence with the fan.

	The faster the fan turns, the more turbulence is created, which acts on the larger internal surface area of the stator to begin rotating it.		The faster the fan turns, the more turbulence is created, which acts on the larger internal surface area of the stator to begin rotating it.

	As RPMs are reduced, the less coupling between the inner fan and the outer stator allowing the input shaft to remain spinning, while the output shaft can be stationary in effect creating a hydraulic slippage clutch with no hard surfaces, belts, chains, or other solid devices to wear against each other, except bearings needed to hold the fan inside the stator, and to mount to the input and output shafts.		The "fan" or turbulence inducing device within the "stator" may be more of a more simple, straight forward design, or it may be more complex consisting of gear multipliers, and rollers to increase or manipulate the turbulence curves and effects.

			In principal as RPMs are reduced, the less coupling between the inner fan and the outer stator allowing the input shaft to remain spinning, while the output shaft can be stationary in effect creating a hydraulic slippage clutch with no hard surfaces, belts, chains, or other solid devices to wear against each other, except bearings needed to hold the fan inside the stator, and to mount to the input and output shafts.

192.234.148.250 at 06:44, 25 August 2009

2009-08-25T06:44:12Z

New page

An axial mounted enclosed circular housing mounted to an "output" shaft, typically consisting of a "stator like" outer hollow doughnut with a separate, non-mechanically coupled, internal fan or turbine mounted to an input shaft and contained inside a viscous fluid or oil within the "doughnut" or stator. The fluid coupler or torque converter then acts on the principal of turbulence and resistance created by the rotation of the fan inside the stator using the fluid or oil as a coupling medium to induce a torque to turn the stator.

The faster the fan turns, the more turbulence is created, which acts on the larger internal surface area of the stator to begin rotating it.

As RPMs are reduced, the less coupling between the inner fan and the outer stator allowing the input shaft to remain spinning, while the output shaft can be stationary in effect creating a hydraulic slippage clutch with no hard surfaces, belts, chains, or other solid devices to wear against each other, except bearings needed to hold the fan inside the stator, and to mount to the input and output shafts.