About: Cornish engine valve gear     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : owl:Thing, within Data Space : dbpedia.org associated with source document(s)
QRcode icon
http://dbpedia.org/describe/?url=http%3A%2F%2Fdbpedia.org%2Fresource%2FCornish_engine_valve_gear&graph=http%3A%2F%2Fdbpedia.org&graph=http%3A%2F%2Fdbpedia.org

Valve gear opens and closes valves in the correct order. In rotating engines valve timings can be driven by eccentrics or cranks, but in non-rotative beam engines these options are not available. In the Cornish engine valves are driven either manually or through ‘plug rods’ and tappets driven from the beam. This permits the insertions of delays at various points in the cycle, allowing a Cornish Engine to vary from one stroke in ten minutes, to ten or more strokes in one minute, but also leads to some less familiar components when compared with rotative engines.

AttributesValues
rdfs:label
  • Cornish engine valve gear (en)
rdfs:comment
  • Valve gear opens and closes valves in the correct order. In rotating engines valve timings can be driven by eccentrics or cranks, but in non-rotative beam engines these options are not available. In the Cornish engine valves are driven either manually or through ‘plug rods’ and tappets driven from the beam. This permits the insertions of delays at various points in the cycle, allowing a Cornish Engine to vary from one stroke in ten minutes, to ten or more strokes in one minute, but also leads to some less familiar components when compared with rotative engines. (en)
foaf:depiction
  • http://commons.wikimedia.org/wiki/Special:FilePath/Battersea_55_inch_Cornish_engine_valve_gear_with_annotations.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Cornish_Engine_valve_gear_components_-_annotated.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Cornish_Engine_valve_gear_position_and_connections.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Maudslay_Engine_(3016555263).jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Sandfields_Pumping_Station_-_Interlocking_sectors_(geograph_6404029).jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Steam_valves_used_during_the_Cornish_Cycle.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Taylors_shaft_engine_-_detailed_view_of_locking_mechanism.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Cornish_engines,_Crofton_-_geograph.org.uk_-_660336.jpg
dcterms:subject
Wikipage page ID
Wikipage revision ID
Link from a Wikipage to another Wikipage
Link from a Wikipage to an external page
sameAs
dbp:wikiPageUsesTemplate
thumbnail
source
text
  • Driving a Cornish beam engine is tricky enough but the Bull is a different kettle of fish altogether. Not only is the cycle 'upside down' but the arbors are in a different order and the cataract pauses the equilibrium stroke rather than the power stroke. (en)
  • The engine is always started with high pressure steam without a vacuum, the steam and eduction cataract ... being secured by a pin so that the valve catches cannot be lifted by the cataract. The regulating valve is opened by the handwheel and screw; the eduction and injection valves are opened by the handle; and the steam valve is opened by placing the foot in the stirrup on the rod. The engine thus makes the indoor stroke, and after a few strokes a vacuum is produced, and the engine regulated to the proper length of stroke by the regulating valve. The cataract ... is then released so that it may liberate the valve catches; and the engine then works the desired length of stroke so long as the steam in the boilers remains at about the same pressure. (en)
has abstract
  • Valve gear opens and closes valves in the correct order. In rotating engines valve timings can be driven by eccentrics or cranks, but in non-rotative beam engines these options are not available. In the Cornish engine valves are driven either manually or through ‘plug rods’ and tappets driven from the beam. This permits the insertions of delays at various points in the cycle, allowing a Cornish Engine to vary from one stroke in ten minutes, to ten or more strokes in one minute, but also leads to some less familiar components when compared with rotative engines. (en)
prov:wasDerivedFrom
page length (characters) of wiki page
foaf:isPrimaryTopicOf
is Link from a Wikipage to another Wikipage of
is foaf:primaryTopic of
Faceted Search & Find service v1.17_git139 as of Feb 29 2024


Alternative Linked Data Documents: ODE     Content Formats:   [cxml] [csv]     RDF   [text] [turtle] [ld+json] [rdf+json] [rdf+xml]     ODATA   [atom+xml] [odata+json]     Microdata   [microdata+json] [html]    About   
This material is Open Knowledge   W3C Semantic Web Technology [RDF Data] Valid XHTML + RDFa
OpenLink Virtuoso version 08.03.3330 as of Mar 19 2024, on Linux (x86_64-generic-linux-glibc212), Single-Server Edition (61 GB total memory, 44 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software