Effect of Groove Sectional Shape on the Lubrication Characteristics of Hydraulic Spool Valve

The spools in most all the hydraulic spool type control valve have several circumferential grooves to prevent well known hydraulic locking problems which result in high friction force and excessive wear. In this paper, a commercial computational fluid dynamics (CFD) code, FLUENT is used to investiga...

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Autores principales:	Tae-Jo Park, Yun-Geon Hwang
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2010
Materias:	spool valve hydraulic locking groove streamline leakage cfd 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/ffeb4aeb7b6a41659bf77838517ce4b6
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id	oai:doaj.org-article:ffeb4aeb7b6a41659bf77838517ce4b6
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spelling	oai:doaj.org-article:ffeb4aeb7b6a41659bf77838517ce4b62021-11-05T09:26:47ZEffect of Groove Sectional Shape on the Lubrication Characteristics of Hydraulic Spool Valve1881-219810.2474/trol.5.239https://doaj.org/article/ffeb4aeb7b6a41659bf77838517ce4b62010-10-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/5/5/5_5_239/_pdf/-char/enhttps://doaj.org/toc/1881-2198The spools in most all the hydraulic spool type control valve have several circumferential grooves to prevent well known hydraulic locking problems which result in high friction force and excessive wear. In this paper, a commercial computational fluid dynamics (CFD) code, FLUENT is used to investigate the effects of groove sectional shapes and its sizes on the flow and lubrication characteristics of single grooved hydraulic spool valve. The streamlines, velocity and pressure distributions in the groove, and leakage flow through the clearance are obtained for various groove depths and sectional shapes. For shallow groove, the streamlines and leakages are highly affected by groove shapes and depths. However, for relatively deep groove, the pressure distribution and leakage are nearly uninfluenced by groove depth. It is newly found that there occurred vortices inside groove beyond a certain ratio of groove depth to width. The vortex can play as contaminants collector so contribute to reduce abrasive wear. The numerical method adopted in this paper and results can be used in optimum design of spool valves.Tae-Jo ParkYun-Geon HwangJapanese Society of Tribologistsarticlespool valvehydraulic lockinggroovestreamlineleakagecfdPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 5, Iss 5, Pp 239-244 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	spool valve hydraulic locking groove streamline leakage cfd Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	spool valve hydraulic locking groove streamline leakage cfd Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Tae-Jo Park Yun-Geon Hwang Effect of Groove Sectional Shape on the Lubrication Characteristics of Hydraulic Spool Valve
description	The spools in most all the hydraulic spool type control valve have several circumferential grooves to prevent well known hydraulic locking problems which result in high friction force and excessive wear. In this paper, a commercial computational fluid dynamics (CFD) code, FLUENT is used to investigate the effects of groove sectional shapes and its sizes on the flow and lubrication characteristics of single grooved hydraulic spool valve. The streamlines, velocity and pressure distributions in the groove, and leakage flow through the clearance are obtained for various groove depths and sectional shapes. For shallow groove, the streamlines and leakages are highly affected by groove shapes and depths. However, for relatively deep groove, the pressure distribution and leakage are nearly uninfluenced by groove depth. It is newly found that there occurred vortices inside groove beyond a certain ratio of groove depth to width. The vortex can play as contaminants collector so contribute to reduce abrasive wear. The numerical method adopted in this paper and results can be used in optimum design of spool valves.
format	article
author	Tae-Jo Park Yun-Geon Hwang
author_facet	Tae-Jo Park Yun-Geon Hwang
author_sort	Tae-Jo Park
title	Effect of Groove Sectional Shape on the Lubrication Characteristics of Hydraulic Spool Valve
title_short	Effect of Groove Sectional Shape on the Lubrication Characteristics of Hydraulic Spool Valve
title_full	Effect of Groove Sectional Shape on the Lubrication Characteristics of Hydraulic Spool Valve
title_fullStr	Effect of Groove Sectional Shape on the Lubrication Characteristics of Hydraulic Spool Valve
title_full_unstemmed	Effect of Groove Sectional Shape on the Lubrication Characteristics of Hydraulic Spool Valve
title_sort	effect of groove sectional shape on the lubrication characteristics of hydraulic spool valve
publisher	Japanese Society of Tribologists
publishDate	2010
url	https://doaj.org/article/ffeb4aeb7b6a41659bf77838517ce4b6
work_keys_str_mv	AT taejopark effectofgroovesectionalshapeonthelubricationcharacteristicsofhydraulicspoolvalve AT yungeonhwang effectofgroovesectionalshapeonthelubricationcharacteristicsofhydraulicspoolvalve
_version_	1718444388288299008

Effect of Groove Sectional Shape on the Lubrication Characteristics of Hydraulic Spool Valve

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