Open AccessINFLUENCE OF WORKING FLUID VISCOSITY ON LUBRICATION MODE OF HYDRAULIC UNITS OF CONSTRUCTION MACHINES
Author(s) -
Vyacheslav Tkach
Publication year - 2021
Publication title -
globus: tehničeskie nauki
Language(s) - English
Resource type - Journals
ISSN - 2713-3079
DOI - 10.52013/2713-3079-39-3-1
Subject(s) - plunger , viscosity , lubrication , lubricant , piston (optics) , mechanics , dimensionless quantity , materials science , plunger pump , rotation (mathematics) , bearing (navigation) , fluid bearing , piston pump , mechanical engineering , rotational speed , flow (mathematics) , hydraulic pump , composite material , engineering , physics , mathematics , optics , geometry , wavefront , astronomy
The influence of dynamic viscosity of working liquids И-20А, МГЕ-46В, ВМГЗ on the lubrication of plunger pairs of axial-piston pumps of construction equipment is considered in the article. Based on the existing classification of lubricant types, a mathematical model is obtained to determine the effective viscosity, which corresponds to the transition of the plunger pair from the boundary lubrication regime to the semi-liquid mode. The obtained model takes into account the geometric parameters, the speed of rotation of the pump shaft and the size of the dimensionless criterion — the relative thickness of the lubricating film. The calculation of the change in the effective viscosity from the angle of rotation of the shaft for a plunger pair of an axial-piston pump with an inclined disk.