국내 최대 기계 및 로봇 연구정보

공학설계D/B

공학설계D/B 게시판 내용
Volume Title	Tribology
Volume No	Journal bearing calculations - hydrodynamic (axial/circumferential groove, laminar/turbulent), hydrostatic.
DATA Title	Calculation methods for externally pressurised (hydrostatic) journal bearings with capillary restrictor control.
DATA Item	92026
KEYWORD	bearing, capillary, design, eccentricity, flow, hydrostatic, journal, loss, lubricant, performance, power, rate, restrictor, temperature
ISBN	0 85679 831 2
ABSTRACT	ESDU 92026 provides a procedure for the design and performance analysis of the bearings with five or more identical equally-spaced rectangular recesses (or pockets) fed by identical capillary restrictors from a constant pressure supply. The method takes account of stiffness and overload capacity requirements and determines the bearing overall size and proportions from the required load, speed and shaft diameter, recommends the clearance and supply pressure, and defines the recess dimensions and capillary restrictor size from the properties of the chosen lubricant. Equations and charts allow prediction of the journal displacement under load, the power loss, the lubricant flow rate, and the bearing and lubricant temperatures. The method applies to laminar flow and guidance is given for assessing the onset of non-laminar flow in the bearing and restrictors. Guidance is also given on the likelihood of bearing-induced instability. The user is assisted by flowcharts in applying the method. See ESDU 92037 for a Fortran program of this calculation method.