| Port plate pair,which is one of the key tribopairs in the water hydraulic axial piston pump,is easy to lose effectiveness due to the corrosion and wear under the water lubricating conditions.That has always been a reaserch hotpot to scholars,because it has a great influence on pump's efficiency,stability and service life.With the development of bionics,especially the effect of bionic non-smooth surface,it provides a new mentality for reducing the friction and wear design of the key tribopairs of high seawater axial piston pump.So,it is necessary to research the mechanism of lubrication and bearing and the properties of friction and wear for the bionic non-smooth surface.The research result will be used for guiding the design of port plate pair with bionic non-smooth surface for the water hydraulic axial piston pump,which has significant theoretical meaning and broad application prospect.The research selects the bionic non-smooth surface port plate of a water hydraulic axial piston pump as the object.The lubrication film flow field is researched through numerical simulation to reseach the mechanism of lubrication and bearing.And the experimental study,which investigates the friction and wear properties of GF/EPR and CFRPEEK samples with bionic non-smooth surface,is carried out.The ring on disc wear and friction machine,with conditions representative of an actual port palte pair,is employed in the experimental study.Then the friction and wear tests of bionic non-smooth surface port plate are conducted with an actual water hydralic axile pistion pump,which investigates the friction and wear properties of the bionic non-smooth surface port plate.First of all,Solidworks is adopted to establish flow field geometric models with bionic non-smooth surface.And the flow field geometric models are meshed with Gambit.Then,steady-state,implicit density-based solver and standard k-? turbulence model solver are used to solver this issue.The velocity filed,pressure filed and surface load capacity of the molde are researched when the flow field geometric model with different type pits,pit diameters,pit numbers and rotational speeds,which is used to study the mechanism of the lubrication and bearing.Secondly,using ring on disc friction pair to simulate the port plate pair,the experimental reseaches,with smooth surface ring samples of 316 L stainless steel and bionic non-smooth surface disc samples of GF/EPR,are carried out on the MMU-5G friction tester under seawater lubrication.Then,according to the theories of materialogy and tribology,the friction coefficients,the test temperature rise,the morphologies of the sample before and after tests,the mass loss of samples are investigated to study the fricion and wear properties and mechanism.Thirdly,taking the port palte pair configuration parameters of a water hydraulic axial piston pump as reference,the ring sample with smooth surface are processed with 431 stainless steel,and the disc samples with bionic non-smooth surface are processed with CFRPEEK.Then,the experimental studies are carried out on the MMD-5A friction tester under seawater lubrication.Also the friction coefficients,the morphologies of the samples,the mass loss are taken as evaluation indexes to investigate the influence of different pit type on the friction and wear properties.Finally,based on the research ahead,the bionic non-smooth surface port plates are designed and machined with CFRPEEK.Then,the friction and wear studys are carried out on the actual water hydraulic axial piston pump,which used bionic non-smooth surface port plate as the replacement of the original port plate.Subsequently,comparative analyses are carried out to discusse the friction and wear properties of the bionic non-smooth surface port plate in the actual water hydraulic axial piston pump.The research findings show that the bionic non-smooth surface can improve the frction and wear properties of port plat pair.It provides reference for the anti-friction and anti-wear design for port plate pair. |
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