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...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Japanese Society of Tribologists
2015-04-01
|
| Series: | Tribology Online |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/trol/10/2/10_96/_pdf/-char/en |
| _version_ | 1819014794428022784 |
|---|---|
| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-21T02:21:30Z |
| format | Article |
| id | doaj.art-3332f31e4ea84ad6b7f40f7f100c6999 |
| institution | Directory Open Access Journal |
| issn | 1881-2198 |
| language | English |
| last_indexed | 2024-12-21T02:21:30Z |
| publishDate | 2015-04-01 |
| publisher | Japanese Society of Tribologists |
| record_format | Article |
| series | Tribology Online |
| spelling | doaj.art-3332f31e4ea84ad6b7f40f7f100c69992022-12-21T19:19:08ZengJapanese Society of TribologistsTribology Online1881-21982015-04-011029610510.2474/trol.10.96trolInfluences of Journal Rotating Direction on Cryogenic Hybrid Journal BearingsMamoru Oike0Masataka Kikuchi1Satoshi Takada2Takayuki Sudo3Tomoyuki Takano4Department of Mechanical Engineering, Ishinomaki Senshu UniversityRocket Engine Research Center, Japan Aerospace Exploration AgencyRocket Engine Research Center, Japan Aerospace Exploration AgencyRocket Engine Research Center, Japan Aerospace Exploration AgencyJapan Aerospace TechnologyIn 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.https://www.jstage.jst.go.jp/article/trol/10/2/10_96/_pdf/-char/enjournal bearingcryogenic turbopumprecess sweepback anglerotordynamic performanceliquid nitrogen |
| spellingShingle | Mamoru Oike Masataka Kikuchi Satoshi Takada Takayuki Sudo Tomoyuki Takano Influences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings Tribology Online journal bearing cryogenic turbopump recess sweepback angle rotordynamic performance liquid nitrogen |
| title | 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_short | Influences of Journal Rotating Direction on Cryogenic Hybrid Journal Bearings |
| title_sort | influences of journal rotating direction on cryogenic hybrid journal bearings |
| topic | journal bearing cryogenic turbopump recess sweepback angle rotordynamic performance liquid nitrogen |
| url | https://www.jstage.jst.go.jp/article/trol/10/2/10_96/_pdf/-char/en |
| work_keys_str_mv | AT mamoruoike influencesofjournalrotatingdirectiononcryogenichybridjournalbearings AT masatakakikuchi influencesofjournalrotatingdirectiononcryogenichybridjournalbearings AT satoshitakada influencesofjournalrotatingdirectiononcryogenichybridjournalbearings AT takayukisudo influencesofjournalrotatingdirectiononcryogenichybridjournalbearings AT tomoyukitakano influencesofjournalrotatingdirectiononcryogenichybridjournalbearings |