Lempor exhaust system: Difference between revisions
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[[Category:Steam Locomotive Parts]] | [[Category:Steam Locomotive Parts]] | ||
[[Category: | [[Category:Definitions]] | ||
[[File:Lempor-coloured.gif|thumb|right|400px|Components of a Lempor exhaust system.]] | |||
The [[Lempor ejector]] is a steam locomotive exhaust system developed by noted Argentine locomotive engineer Livio Dante Porta. The ejector's name is a portmanteau of the names of Porta and Belgian locomotive engineer Maurice Lemaître. | |||
In a steam locomotive, draft is produced in the firebox by exhausting the steam coming from the cylinders into the Chimney via a nozzle or 'blast pipe' that creates a vacuum in the Smokebox. The Lempor ejector is a development of similar multiple orifice/nozzle ejectors which create either a stronger vacuum or the same vacuum more efficiently by presenting less 'back pressure' or resistance to the exhausting cylinder. | |||
The modern [[Lempor ejector]] consists of four main components: | The modern [[Lempor ejector]] consists of four main components: | ||
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# The diffuser | # The diffuser | ||
# The Kordina which is so designed that each 'puff' of exhaust steam creates a vacuum in the other cylinder | # The Kordina which is so designed that each 'puff' of exhaust steam creates a vacuum in the other cylinder | ||
<gallery widths=300 heights=300 perrow=2> | |||
File:Lempor dimensions garrett.jpg|General dimensions for a Lempor exhaust system. | |||
</gallery> | |||
== External Links == | == External Links == | ||
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* [https://trevorheath.com/livesteaming/Lempor.htm "Lempor Exhaust Ejector", Treavor Heath] | * [https://trevorheath.com/livesteaming/Lempor.htm "Lempor Exhaust Ejector", Treavor Heath] | ||
* [https://www.martynbane.co.uk/modernsteam/nday/6aandthelempor_shaun.htm "6A and the Lempor"] | * [https://www.martynbane.co.uk/modernsteam/nday/6aandthelempor_shaun.htm "6A and the Lempor"] | ||
* [http://journal-download.co.uk/digitalmagazines/edr/EDR01JUL2020FULLEDR.pdf <i>Engineering Designer</i> magazine, page 13] | |||
* [https://www.martynbane.co.uk/modernsteam/nday/ndaytech.htm "Oil Firing & Lempor Exhaust Systems"] | |||
* [https://www.martynbane.co.uk/modernsteam/nday/45mm/45mm.htm "The World's Smallest Lempor"] | |||
* [http://home.ca.inter.net/~mguy/lempor_ejector_calculator_page.htm "The Lempor Ejector Calculator" (Excel Spreadsheet)] | |||
Latest revision as of 19:04, 26 December 2022
The Lempor ejector is a steam locomotive exhaust system developed by noted Argentine locomotive engineer Livio Dante Porta. The ejector's name is a portmanteau of the names of Porta and Belgian locomotive engineer Maurice Lemaître.
In a steam locomotive, draft is produced in the firebox by exhausting the steam coming from the cylinders into the Chimney via a nozzle or 'blast pipe' that creates a vacuum in the Smokebox. The Lempor ejector is a development of similar multiple orifice/nozzle ejectors which create either a stronger vacuum or the same vacuum more efficiently by presenting less 'back pressure' or resistance to the exhausting cylinder.
The modern Lempor ejector consists of four main components:
- The blast pipe or Tuyere made up of four nozzles which have convergent/divergent sections
- The mixing chamber
- The diffuser
- The Kordina which is so designed that each 'puff' of exhaust steam creates a vacuum in the other cylinder
General dimensions for a Lempor exhaust system.
External Links
- "Theory of the Lempor Ejector as Applied to Produce Draught in Steam Locomotives", by L.D. Porta (PDF)
- "A Primer on the Lempor Exhaust"
- "A Lempor Exhaust Ejector for the Garrett"
- Lempor Exhaust on UP Challenger 3985
- "Lempor Exhaust Ejector", Treavor Heath
- "6A and the Lempor"
- Engineering Designer magazine, page 13
- "Oil Firing & Lempor Exhaust Systems"
- "The World's Smallest Lempor"
- "The Lempor Ejector Calculator" (Excel Spreadsheet)