Open AccessInternal Leakages in a Water Hydraulic Pump with Gears From Plastic
Author(s) -
Michał Banaś
Publication year - 2021
Publication title -
international journal of fluid power
Language(s) - English
Resource type - Journals
eISSN - 2332-1180
pISSN - 1439-9776
DOI - 10.13052/ijfp1439-9776.2133
Subject(s) - hydraulic fluid , gear pump , leakage (economics) , oil pump , hydraulic pump , mechanical engineering , machining , injection moulding , petroleum engineering , hydraulic pressure , engineering , hydraulic machinery , internal pressure , working fluid , materials science , composite material , economics , macroeconomics
Plastics are used more and more in hydraulic systems. The chemical properties of the plastics favour the use of working fluids alternative to mineral oil, e.g. water. The conditions in the manufacturing process, e.g. injection moulding, limit the achievement of high working pressures in the hydraulic elements. Internal leakage reduces the efficiency of the hydraulic pump with plastic gears. The article presents the results of internal leakage tests of a water-supplied hydraulic pump. Gears made of various materials (PPS+GF40 and PEEK) have been used in the research, made by two methods: injection moulding and machining. A simplified mathematical model of the dependence of leakages on pressure and rotational speed has been developed. The influence of the materials and manufacturing methods used on the pump operation is discussed.