Influences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings

In the present study, two types of nine-recess hybrid journal bearings (HJBs) with different recess geometries, i.e., the Young Leaf Mark and the square, were operated at a rotational speed of up to 67,000 rpm using the cryogenic journal bearing test apparatus at JAXA to clarify influences of the jo...

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Autores principales:	Mamoru Oike, Masataka Kikuchi, Satoshi Takada, Takayuki Sudo, Tomoyuki Takano
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2015
Materias:	journal bearing cryogenic turbopump recess sweepback angle rotordynamic performance liquid nitrogen Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/3332f31e4ea84ad6b7f40f7f100c6999
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spelling	oai:doaj.org-article:3332f31e4ea84ad6b7f40f7f100c69992021-11-05T09:22:37ZInfluences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings1881-219810.2474/trol.10.96https://doaj.org/article/3332f31e4ea84ad6b7f40f7f100c69992015-04-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/10/2/10_96/_pdf/-char/enhttps://doaj.org/toc/1881-2198In the present study, two types of nine-recess hybrid journal bearings (HJBs) with different recess geometries, i.e., the Young Leaf Mark and the square, were operated at a rotational speed of up to 67,000 rpm using the cryogenic journal bearing test apparatus at JAXA to clarify influences of the journal rotating direction on the cryogenic HJB. Liquid nitrogen was supplied to the test bearings with a pressure of up to 4 MPa. The test bearings were 60 mm in diameter and 25 mm in width, with a 0.055 mm clearance and a recess area ratio of 0.186. Based on the experimental results the dependence of the rotor vibration on the rotational speed was confirmed to be affected by the journal rotating direction. The test HJBs with the positive sweepback angle of the recess leading edge showed the smallest rotor vibration in the high-rotational-speed operation where the hydrodynamic effect was predominant.Mamoru OikeMasataka KikuchiSatoshi TakadaTakayuki SudoTomoyuki TakanoJapanese Society of Tribologistsarticlejournal bearingcryogenic turbopumprecess sweepback anglerotordynamic performanceliquid nitrogenPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 10, Iss 2, Pp 96-105 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	journal bearing cryogenic turbopump recess sweepback angle rotordynamic performance liquid nitrogen Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	journal bearing cryogenic turbopump recess sweepback angle rotordynamic performance liquid nitrogen Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Mamoru Oike Masataka Kikuchi Satoshi Takada Takayuki Sudo Tomoyuki Takano Influences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings
description	In the present study, two types of nine-recess hybrid journal bearings (HJBs) with different recess geometries, i.e., the Young Leaf Mark and the square, were operated at a rotational speed of up to 67,000 rpm using the cryogenic journal bearing test apparatus at JAXA to clarify influences of the journal rotating direction on the cryogenic HJB. Liquid nitrogen was supplied to the test bearings with a pressure of up to 4 MPa. The test bearings were 60 mm in diameter and 25 mm in width, with a 0.055 mm clearance and a recess area ratio of 0.186. Based on the experimental results the dependence of the rotor vibration on the rotational speed was confirmed to be affected by the journal rotating direction. The test HJBs with the positive sweepback angle of the recess leading edge showed the smallest rotor vibration in the high-rotational-speed operation where the hydrodynamic effect was predominant.
format	article
author	Mamoru Oike Masataka Kikuchi Satoshi Takada Takayuki Sudo Tomoyuki Takano
author_facet	Mamoru Oike Masataka Kikuchi Satoshi Takada Takayuki Sudo Tomoyuki Takano
author_sort	Mamoru Oike
title	Influences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings
title_short	Influences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings
title_full	Influences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings
title_fullStr	Influences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings
title_full_unstemmed	Influences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings
title_sort	influences of journal rotating direction on cryogenic hybrid journal bearings
publisher	Japanese Society of Tribologists
publishDate	2015
url	https://doaj.org/article/3332f31e4ea84ad6b7f40f7f100c6999
work_keys_str_mv	AT mamoruoike influencesofjournalrotatingdirectiononcryogenichybridjournalbearings AT masatakakikuchi influencesofjournalrotatingdirectiononcryogenichybridjournalbearings AT satoshitakada influencesofjournalrotatingdirectiononcryogenichybridjournalbearings AT takayukisudo influencesofjournalrotatingdirectiononcryogenichybridjournalbearings AT tomoyukitakano influencesofjournalrotatingdirectiononcryogenichybridjournalbearings
_version_	1718444401455267840

Influences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings

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