DEVICE FOR CORROSION CRACK PREVENTION FOR STEAM TURBINE

DEVICE FOR CORROSION CRACK PREVENTION FOR STEAM TURBINE

PURPOSE:To prevent stress corrosion cracks of a shrinkage fit rotor disc section by opening a vent passage communicating to a low pressure side in an intermediate section of a labyrinth packing provided in the inner circumferential surface of a nozzle diaphragm. CONSTITUTION:A through hole 11a is dr...

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Hauptverfasser: SHINOZAKI YUKIO, AKIBA MASAFUMI
Format: Patent
Sprache:eng
Schlagworte:
BLASTING
ENGINE PLANTS IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES
STEAM ENGINES
WEAPONS
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creator SHINOZAKI YUKIO
AKIBA MASAFUMI
description PURPOSE:To prevent stress corrosion cracks of a shrinkage fit rotor disc section by opening a vent passage communicating to a low pressure side in an intermediate section of a labyrinth packing provided in the inner circumferential surface of a nozzle diaphragm. CONSTITUTION:A through hole 11a is drilled in a nozzle diaphragm for a stage which is liable to stress corrosion cracks, one end of which is communicated to an intermediate section of a labyrinth packing 9a provided in the inner circumferential surface of the diaphragm, and the other end to an intermediate section of a labyrinth packing 9b of the following stage by way of a pipe 12. By this constitution, as the temperature of steam flowing from the labyrinth packing 9a into a key groove 4b is reduced to a temperature proportionate to the pressure in the following stage, the steam condensation in the key groove 4b can be prevented so that stress corrosion cracks of a shrinkage fit rotor disc section may be prevented.
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CONSTITUTION:A through hole 11a is drilled in a nozzle diaphragm for a stage which is liable to stress corrosion cracks, one end of which is communicated to an intermediate section of a labyrinth packing 9a provided in the inner circumferential surface of the diaphragm, and the other end to an intermediate section of a labyrinth packing 9b of the following stage by way of a pipe 12. By this constitution, as the temperature of steam flowing from the labyrinth packing 9a into a key groove 4b is reduced to a temperature proportionate to the pressure in the following stage, the steam condensation in the key groove 4b can be prevented so that stress corrosion cracks of a shrinkage fit rotor disc section may be prevented.</description><language>eng</language><subject>BLASTING ; ENGINE PLANTS IN GENERAL ; HEATING ; LIGHTING ; MACHINES OR ENGINES IN GENERAL ; MECHANICAL ENGINEERING ; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES ; STEAM ENGINES ; WEAPONS</subject><creationdate>1984</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19840829&amp;DB=EPODOC&amp;CC=JP&amp;NR=S59150907A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19840829&amp;DB=EPODOC&amp;CC=JP&amp;NR=S59150907A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SHINOZAKI YUKIO</creatorcontrib><creatorcontrib>AKIBA MASAFUMI</creatorcontrib><title>DEVICE FOR CORROSION CRACK PREVENTION FOR STEAM TURBINE</title><description>PURPOSE:To prevent stress corrosion cracks of a shrinkage fit rotor disc section by opening a vent passage communicating to a low pressure side in an intermediate section of a labyrinth packing provided in the inner circumferential surface of a nozzle diaphragm. 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By this constitution, as the temperature of steam flowing from the labyrinth packing 9a into a key groove 4b is reduced to a temperature proportionate to the pressure in the following stage, the steam condensation in the key groove 4b can be prevented so that stress corrosion cracks of a shrinkage fit rotor disc section may be prevented.</description><subject>BLASTING</subject><subject>ENGINE PLANTS IN GENERAL</subject><subject>HEATING</subject><subject>LIGHTING</subject><subject>MACHINES OR ENGINES IN GENERAL</subject><subject>MECHANICAL ENGINEERING</subject><subject>NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES</subject><subject>STEAM ENGINES</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1984</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDB3cQ3zdHZVcPMPUnD2DwryD_b091NwDnJ09lYICHINc_ULAQmApINDXB19FUJCg5w8_Vx5GFjTEnOKU3mhNDeDoptriLOHbmpBfnxqcUFicmpeakm8V0CwqaWhqYGlgbmjMTFqAEmrKJs</recordid><startdate>19840829</startdate><enddate>19840829</enddate><creator>SHINOZAKI YUKIO</creator><creator>AKIBA MASAFUMI</creator><scope>EVB</scope></search><sort><creationdate>19840829</creationdate><title>DEVICE FOR CORROSION CRACK PREVENTION FOR STEAM TURBINE</title><author>SHINOZAKI YUKIO ; AKIBA MASAFUMI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPS59150907A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1984</creationdate><topic>BLASTING</topic><topic>ENGINE PLANTS IN GENERAL</topic><topic>HEATING</topic><topic>LIGHTING</topic><topic>MACHINES OR ENGINES IN GENERAL</topic><topic>MECHANICAL ENGINEERING</topic><topic>NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES</topic><topic>STEAM ENGINES</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>SHINOZAKI YUKIO</creatorcontrib><creatorcontrib>AKIBA MASAFUMI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SHINOZAKI YUKIO</au><au>AKIBA MASAFUMI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>DEVICE FOR CORROSION CRACK PREVENTION FOR STEAM TURBINE</title><date>1984-08-29</date><risdate>1984</risdate><abstract>PURPOSE:To prevent stress corrosion cracks of a shrinkage fit rotor disc section by opening a vent passage communicating to a low pressure side in an intermediate section of a labyrinth packing provided in the inner circumferential surface of a nozzle diaphragm. CONSTITUTION:A through hole 11a is drilled in a nozzle diaphragm for a stage which is liable to stress corrosion cracks, one end of which is communicated to an intermediate section of a labyrinth packing 9a provided in the inner circumferential surface of the diaphragm, and the other end to an intermediate section of a labyrinth packing 9b of the following stage by way of a pipe 12. By this constitution, as the temperature of steam flowing from the labyrinth packing 9a into a key groove 4b is reduced to a temperature proportionate to the pressure in the following stage, the steam condensation in the key groove 4b can be prevented so that stress corrosion cracks of a shrinkage fit rotor disc section may be prevented.</abstract><oa>free_for_read</oa></addata></record>
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subjects BLASTING
ENGINE PLANTS IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES
STEAM ENGINES
WEAPONS
title DEVICE FOR CORROSION CRACK PREVENTION FOR STEAM TURBINE
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