Thermohydrodynamic Lubrication Model Applicable to a Slipper of Swashplate Type Axial Piston Pumps and Motors (Effects of Operating Conditions)

A thermohydrodynamic lubrication (THL) model of a hybrid (hydrostatic and hydrodynamic) thrust bearing is developed. It is applicable to a slipper of swashplate-type axial piston pumps and motors. The generalized Reynolds equation, three-dimensional energy equation, and the heat conduction equation...

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Autor principal:	Toshiharu Kazama
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2010
Materias:	tribology fluid power systems hydrostatic bearings thermohydrodynamic lubrication slipper swashplate eccentric load physical properties lubricant piston pumps and motors 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/cedf80b8c10e49429c6d8d8063633554
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spelling	oai:doaj.org-article:cedf80b8c10e49429c6d8d80636335542021-11-05T09:26:48ZThermohydrodynamic Lubrication Model Applicable to a Slipper of Swashplate Type Axial Piston Pumps and Motors (Effects of Operating Conditions)1881-219810.2474/trol.5.250https://doaj.org/article/cedf80b8c10e49429c6d8d80636335542010-10-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/5/5/5_5_250/_pdf/-char/enhttps://doaj.org/toc/1881-2198A thermohydrodynamic lubrication (THL) model of a hybrid (hydrostatic and hydrodynamic) thrust bearing is developed. It is applicable to a slipper of swashplate-type axial piston pumps and motors. The generalized Reynolds equation, three-dimensional energy equation, and the heat conduction equation are derived. Physical properties such as density, viscosity, specific heat at constant pressure, thermal conductivity, and thermal expansivity of a hydraulic oil are considered as functions of temperature and pressure. The effects of the operating conditions on the temperature rise, clearance shape, and the power loss are shown. The numerical parameters are specified for the fluid-a hydraulic oil with ISO VG 46-supply pressure 7-21 MPa and rotational speed 15-60 rps. The solutions between the slipper model and the circular hydrostatic thrust bearing as well as between the THL and isothermal (ISO) solutions are compared. Increases in the supply pressure, rotational speed, and the revolution-radius increase the maximum temperature and the power loss. Furthermore, the discrepancies between the THL and ISO solutions increase. The rotational speed affects characteristics more than the supply pressure.Toshiharu KazamaJapanese Society of Tribologistsarticletribologyfluid power systemshydrostatic bearingsthermohydrodynamic lubricationslipperswashplateeccentric loadphysical propertieslubricantpiston pumps and motorsPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 5, Iss 5, Pp 250-254 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	tribology fluid power systems hydrostatic bearings thermohydrodynamic lubrication slipper swashplate eccentric load physical properties lubricant piston pumps and motors Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	tribology fluid power systems hydrostatic bearings thermohydrodynamic lubrication slipper swashplate eccentric load physical properties lubricant piston pumps and motors Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Toshiharu Kazama Thermohydrodynamic Lubrication Model Applicable to a Slipper of Swashplate Type Axial Piston Pumps and Motors (Effects of Operating Conditions)
description	A thermohydrodynamic lubrication (THL) model of a hybrid (hydrostatic and hydrodynamic) thrust bearing is developed. It is applicable to a slipper of swashplate-type axial piston pumps and motors. The generalized Reynolds equation, three-dimensional energy equation, and the heat conduction equation are derived. Physical properties such as density, viscosity, specific heat at constant pressure, thermal conductivity, and thermal expansivity of a hydraulic oil are considered as functions of temperature and pressure. The effects of the operating conditions on the temperature rise, clearance shape, and the power loss are shown. The numerical parameters are specified for the fluid-a hydraulic oil with ISO VG 46-supply pressure 7-21 MPa and rotational speed 15-60 rps. The solutions between the slipper model and the circular hydrostatic thrust bearing as well as between the THL and isothermal (ISO) solutions are compared. Increases in the supply pressure, rotational speed, and the revolution-radius increase the maximum temperature and the power loss. Furthermore, the discrepancies between the THL and ISO solutions increase. The rotational speed affects characteristics more than the supply pressure.
format	article
author	Toshiharu Kazama
author_facet	Toshiharu Kazama
author_sort	Toshiharu Kazama
title	Thermohydrodynamic Lubrication Model Applicable to a Slipper of Swashplate Type Axial Piston Pumps and Motors (Effects of Operating Conditions)
title_short	Thermohydrodynamic Lubrication Model Applicable to a Slipper of Swashplate Type Axial Piston Pumps and Motors (Effects of Operating Conditions)
title_full	Thermohydrodynamic Lubrication Model Applicable to a Slipper of Swashplate Type Axial Piston Pumps and Motors (Effects of Operating Conditions)
title_fullStr	Thermohydrodynamic Lubrication Model Applicable to a Slipper of Swashplate Type Axial Piston Pumps and Motors (Effects of Operating Conditions)
title_full_unstemmed	Thermohydrodynamic Lubrication Model Applicable to a Slipper of Swashplate Type Axial Piston Pumps and Motors (Effects of Operating Conditions)
title_sort	thermohydrodynamic lubrication model applicable to a slipper of swashplate type axial piston pumps and motors (effects of operating conditions)
publisher	Japanese Society of Tribologists
publishDate	2010
url	https://doaj.org/article/cedf80b8c10e49429c6d8d8063633554
work_keys_str_mv	AT toshiharukazama thermohydrodynamiclubricationmodelapplicabletoaslipperofswashplatetypeaxialpistonpumpsandmotorseffectsofoperatingconditions
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Thermohydrodynamic Lubrication Model Applicable to a Slipper of Swashplate Type Axial Piston Pumps and Motors (Effects of Operating Conditions)

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