{"created":"2023-06-20T15:14:53.687536+00:00","id":44909,"links":{},"metadata":{"_buckets":{"deposit":"457b215f-da46-42b5-af7c-9d3717487bbf"},"_deposit":{"created_by":1,"id":"44909","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"44909"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00044909","sets":["1887:1893","1896:1898:1913:1917"]},"author_link":["471889","471890","471894","471896","471893","471891","471885","471892","471888","471895","471887","471886"],"item_3_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"液水ターボポンプ用メカニカルシールの試作研究"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1981-02","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"36","bibliographicVolumeNumber":"653","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所報告"},{"bibliographic_title":"Technical Report of National Aerospace Laboratory TR-653","bibliographic_titleLang":"en"}]}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"The development of a 10-ton thrust liquid oxygen and liquid hydrogen (LOX and LH2) rocket engine is under way at the National Space Development Agency. In advance of the development of a liquid hydrogen turbopump, the National Aerospace Laboratory carried out study and development of a face-contact, bellows mechanical seal for a liquid hydrogen turbopump in co-operation with the National Space Development Agency. The present report describes the fundamental experiments of the mechanical seal (seal diameter:58.5mm) for liquid nitrogen and liquid hydrogen and the development of the mechanical seal for a liquid hydrogen turbopump (seal diameter:43.2mm). The developed mechanical seal has two features. One is a new type of seal nosepiece, which reduces the sealing face distortion at low temperature and high pressure. It results in a small amount of seal leakage and wear, and a low starting torque. The other feature is a new type vibration damper made of Teflon sheets. Th sheets are fixed in a nosepiece in order to prevent fluttering of the seal nosepiece during the rapid start or stop of a turbopump. Numerous tests were performed to clarify the seal performance. It was confirmed that the developed turbopump mechanical seal satisfied almost all requirements for application to a turbopump: seal leakage, wear life, reliability, starting torqe ,etc.. A long time test of 66 minutes in the condition (fluid pressure: 15 ata, rotating speed: 50,000 rpm, liquid hydrogen coolant flow: 0.4l/sec) was successful. The seal performances of the developed turbopump mechanical seal were as follows: liquid hydrogen leakage in steady state condition was 7.7～19.2cc/min. Wear of seal components after a long time run were 0～8μm in carbon face piece and 0.1μm (maximum) in chromium plate on rotating ring.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: NALTR0653000","subitem_description_type":"Other"}]},"item_3_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: NAL TR-653","subitem_description_type":"Other"}]},"item_3_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"航空宇宙技術研究所"}]},"item_3_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"National Aerospace Laboratory(NAL)"}]},"item_3_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0389-4010","subitem_source_identifier_type":"ISSN"}]},"item_3_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"航空宇宙技術研究所角田支所"},{"subitem_text_value":"航空宇宙技術研究所角田支所"},{"subitem_text_value":"航空宇宙技術研究所宇宙研究グループ"},{"subitem_text_value":"航空宇宙技術研究所角田支所"},{"subitem_text_value":"航空宇宙技術研究所角田支所"},{"subitem_text_value":"宇宙開発事業団"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Kakuda Branch Office, National Aerospace Laboratory(NAL)"},{"subitem_text_language":"en","subitem_text_value":"Kakuda Branch Office, National Aerospace Laboratory(NAL)"},{"subitem_text_language":"en","subitem_text_value":"Space Technology Research Group, National Aerospace Laboratory(NAL)"},{"subitem_text_language":"en","subitem_text_value":"Kakuda Branch Office, National Aerospace Laboratory(NAL)"},{"subitem_text_language":"en","subitem_text_value":"Kakuda Branch Office, National Aerospace Laboratory(NAL)"},{"subitem_text_language":"en","subitem_text_value":"National Space Development Agency of Japan(NASDA)"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"野坂, 正隆"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"鈴木, 峰男"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"宮川, 行雄"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"上絛, 謙二郎"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"菊池, 正孝"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"森, 雅裕"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"NOSAKA, Masataka","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"SUZUKI, Mineo","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"MIYAKAWA, Yukio","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"KAMIJO, Kenjiro","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"KIKUCHI, Masataka","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"MORI, Masahiro","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-01-29"}],"displaytype":"detail","filename":"naltr00653.pdf","filesize":[{"value":"7.7 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"naltr00653.pdf","url":"https://jaxa.repo.nii.ac.jp/record/44909/files/naltr00653.pdf"},"version_id":"540853de-c1f4-4560-97bd-4e75750ad562"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"technical report","resourceuri":"http://purl.org/coar/resource_type/c_18gh"}]},"item_title":"Study and Development of Face-Contact, Bellows Mechanical Seal for Liquid Hydrogen Turbopump","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Study and Development of Face-Contact, Bellows Mechanical Seal for Liquid Hydrogen Turbopump","subitem_title_language":"en"}]},"item_type_id":"3","owner":"1","path":["1893","1917"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"44909","relation_version_is_last":true,"title":["Study and Development of Face-Contact, Bellows Mechanical Seal for Liquid Hydrogen Turbopump"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-20T21:48:42.744041+00:00"}