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1、叶片泵英语文献Emerald Article: Studies on several key problems of water hydraulic vane Industrial Lubrication and TribologypumpYong Lu, Wei Zhang, Yuan-yang Zhao, Zhi-zhong Wang, Peng-cheng ShuArticle information:To cite this document: Yong Lu, Wei Zhang, Yuan-yang Zhao, Zhi-zhong Wang, Peng-cheng Shu, (20

2、11),Studies on several key problems of water hydraulic vane pump, Industrial Lubrication and Tribology, Vol. 63 Iss: 2 pp. 134 - 141Permanent link to this document: http:/dx.doi.org/10.1108/00368791111112243Downloaded on: 07-06-2012References: This document contains references to 32 other documentsT

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7、 which publication to write for and submission guidelines are available for all. Additional help for authors is available for Emerald subscribers. Please visit for more information.About Emerald With over forty years experience, Emerald Group Publishing is a leading independent publisher of global r

8、esearch with impact in business, society, public policy and education. In total, Emerald publishes over 275 journals and more than 130 book series, as well as an extensive range of online products and services. Emerald is both COUNTER 3 and TRANSFER compliant. The organization is a partner of the Co

9、mmittee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation.*Related content and download information correct at time of download.StudiesonseveralkeyproblemsofwaterhydraulicvanepumpYong Lu, Wei Zhang, Yuan-yang Zhao, Zhi-zhong Wang and

10、Peng-cheng ShuNational Engineering Research Center of Fluid Machinery and Compressors, Xian Jiaotong University, Xian, Peoples Republic of ChinaAbstractPurpose The balanced vane pump is a common transmission component in hydraulic systems. Since the physicochemical properties of water andseawater ar

11、e different from that of mineral oil, some problems can occur, for instance, poor lubrication, more leakage, and more corrosion. The paperaims to demonstrate the technical feasibility for the water hydraulic vane pump.Design/methodology/approach The material combinations were selected based on relat

12、ed research in literature. The volumetric efciency andsuction performance were measured in the current experiment. The relations between gap clearances and leakage ow, the contact and the frictionforces between a vane tip and a cam contour were simulated based on mathematic models.Findings The soft-

13、hard material combinations in the prototype pump show preferable friction characteristics during tests. The axial clearances arethe main channels of leakage ow. Pin type vane pump can reduce the contact force of the vane tip.Originality/value This paper outlines some key problems of the water hydrau

14、lic vane pump, such as the friction pair material,the structure, and thecontact force of the vane tip by means of testing the basic performance of pump and mathematic model.Keywords Hydraulic equipment, Lubrication, Structures, CorrosionPaper type Research paperNomenclatureQQ0Q LQ L1, QL2, Q L3hVd,

15、d1, d2, d3dwater, doilrmeasured ow rate with load pressure(L /min)measured ow rate wit hout loadpressure (L /min)total leakage ow (L /min)leakage ow rates of three main leakagechannels (L /min)volumetric efciencygap clearances (mm)gap clearance of water hydraulics oruid density (kg/m )rcsrclhvanea0g

16、0b0bltbuff radius to small arc part of cam ring (mm) radius to large arc part of cam ring (mm) axial length of vane (mm) angle range of suction part angle range of discharge part angle range of large arc part average angle range of volume units inlarge-cycle region with low pressure vane radial leng

17、th (mm) vane thickness (mm) vane extension out of rotor (mm) pressure angle of contact point tilt angle of vane tip friction coefcientrwater, roil(kg/m )2FFss1 uid force on vane tip (N) uid force on vane bottom (N)myy, ypure water viscosity (N s/m )uid kinematic viscosity (cSt)kinematic viscosity of

18、 pure water orFd uid force caused by load pressure actingon vane bottom or pin bottom (N)ppwaterdsoilmineral oil (cSt)discharge pressure (MPa)suction pressure (kPa)FeFpFb1 centrifugal force (N) uid force actingon part of vaneextendingout of rotor (N) binding force between the head of vaneDpDpvrrwate

19、r, Dpoilpressure difference (MPa)pressure difference of water hydraulicsor mineral oil hydraulics (MPa)rotor angular speed (rad/s)radius of rotor (mm)FFFb2tslot and the vane (N) binding force between the vane slot andthe rear part of vane (N) friction force on vane tip (N) friction forcebetweenthe h

20、eadof vaneslotr0, r3radiuses of port plate (mm)Ft1t2and the vane (N) friction forcebetweenthevaneslot and theThe current issue and full text archive of this journal is available atIndustrial Lubrication and Tribology63/2 (2011) 134141Fnrear part of vane (N) contact force between vane tip and camcont

21、our (N)q Emerald Group Publishing Limited ISSN 0036-8792DOI 10.1108/00368791111112243134This research was funded by the Program for Changjiang Scholars andInnovative Research Team in University of China (Grant No. IRT0746).Water hydraulic vane pumpYong Lu, Wei Zhang, Yuan-yang Zhao, Zhi-zhong Wang a

22、nd Peng-cheng ShuFr relative inertial force (N)Fk Coriolis inertial force (N)1. IntroductionIn recent years, water hydraulic technology has been revivingwith the development in materials and manufacturingengineering. Since pure water is environmentally friendly,non-toxic, non-ammable and cost-effect

23、ive, pure waterhydraulic systems has been applied in food industry, steelmills, nuclear engineering, and desalination plants (Lim et al.,2003; Conrad, 2005).Working as a hydraulic uid, physicochemical properties ofpure water are different from that of mineral oil. There are somefactors which hinder

24、the water from being applied in hydraulicsystems, suchas corrosions, a low viscosity, cavitation, freezing,higher bulk modulus, growth of micro organism (Trostmann,1996; Totten, 2000; Krutz and Chua, 2004).In general, the main disadvantages of water are corrosionand low viscosity. The corrosion of w

25、ater hydraulic systems isdue to the dissolved gases, like chlorine, carbon dioxide, andoxygen. In contrast, seawater has much higher electricalconductivity and stronger electrochemical corrosion than purewater, which demands the use of more corrosion-resistantmaterials, such as stainless steel, copp

26、er alloy, ceramics, andpolymers. T he metallic mat erials must comply withelectrochemical series (Wang et al., 2001).Owing to a low viscosity, it is difcult for water to generatehydrodynamic lubrication lms between frict ion pairs.In addition, it is hard to form elastohydrodynamic lubricationas well

27、, because the viscosity changes little with pressure(Nie et al., 2005). The kinematic viscosity of pure water is 1 cStat 208C, while that of mineral oil is about 29 cSt at the sametemperature. In practice, low viscosity means more leakage andpoor lubrication. Under the same conditions of clearance a

28、ndload pressure, the leakage rate in waterhydraulic system is about30 times that of mineral oil (Varandili, 1999). In order tomaintain the volumetric efciency, thinner clearances areneeded to reduce the leakage. High-precession matching is acritical aspect in water hydraulic component (Backe, 1999).

29、However, the thinner clearances can cause coulombfriction andwear. Therefore, the materials of friction pairs in waterhydraulic components should also have wear resistant and orself-lubricating properties. The tribological properties ofseveral material combinations in water or synthetic seawatersitu

30、ation were investigated under different load conditions(Bhushan and Gray, 1979; Clarke andAllen, 1991; Ramo et al.,1999). Brookes et al. (1995 , 199 6) presented materialcombinations between stainless steel and plastics or ceramicsin sliding parts of water hydraulic pump and motor.Westinghouse Oceanics Division (1980) and Black andKuehler (1981) presented a compact seawater hydraulicbalanced vane motor. Throu