关于自然水液压轴向活塞泵和电动机的滑动部分的研究(英文+中文版)

study on slippers for raw water hydraulic axial pistonPUMPS AND MOTORS杨树东、虞祖尧、何小凤、l、张裕(mechanical science and engineering school of mechanical science and engineering华中大学科学与技术学院。Wuhan、Hubei、P. R. China、430074)1.Abstractas concerns for environmental compatibility、safety and hygienic requirements、Hydraulic systems using raw water as pressure medium becesbut as a hydraulic medium、raw water has also drawbacks、such as very low viscosity、high vapor pressure、Lack of lubrication and chhickthatall tend to promote problems of corrosion，wear，cavitation erosion，leakage，and so on，Those problems must be overcomethe slipper/Swash plate pair is one of the very important friction pairs in axial piston pups and motors . under the lubrication of raw water . matersBased on authois researches，A new slipper foraxial piston pups and motors is introducted in this paper。from tests with the slipper/swash plate lest rig，It shows that the new type slipper combined with appropriate swash plate has good tribo logoprovide good helps for design and development of raw water hydraulic axial piston pups and motors with higher performance。2.Introductionthe use of water as hydraulic fluid is not new .the first hydraulic machine as a means of transmitting not only energy but also control signals raw水hydraulic press that manufactured by Joseph brammsafter that almost 100 years raw water was used as hydraulic medium，Until the beginning of 20th century the mineral began to take the place of raw wawbecause of the much better lubrication and anti-corro si on p Roper bes of mineral Oil as compared with raw water and the development of Oil resistationas concerns over safe or environmental issues a number of other hydraulic fluids have been developed over the past decades，Such as synthetic basethese fluids have their own advantages and a certain range of applications。for a given application，Engineers can make the hydraulic system have satisfactory performance by careful hydraulic fluid choice and system deedeshowever，These hydraulic fluids also have its own shortcut ings，So me shortcut ings of These fluids are inherent and fatal . no one of These hyyerthe re-emergence of using raw water as hydraulic fluid is mainly because of the following reasons。(1)environmental protection requirementwithout strict adaherence to specific control techniques，It is nearly impossible to eliminate the threat of leakage in hydraulic systems。industry observers believe that as much as 85% of all hydraulic fluid S eventually leave their systems through slow leaks，catastrophic linethe leakage of hydraulic fluids with some toxic chemical addities not only make working conditions messy and un safe，but also can not be biodegradablepotential threat to the environment。raw water has very good environmental compatibility and no pollution；water in the event of leakage eventually evporates without leaving greasy or dirty resduals need s of applications for water hydraulics .the need of n Ew applications is the intrinsic force of re-emergence and development of water hydraulics(2) Requirement of SafetyMineral oil are flammable，Its leakage or spiling from systems may be result in a fire when in or near heat sources。water is not flammable and does not present a fire hazard。In some areas、such as steel and glass production、iron making and foundry、injection molding、die casting、nuclear power、the requirement of safety is prime，so raw water hydraulics may be the best choice in the near future(3) Hygienic RequirementIn some fields，such as gold mining，food and medicine processing，供水行业，etc，Where escaping of oil or chemical addities from hyyes(4) Economy Requirement水是available everywhere、need ing no purchase、transpo