3MICHAEL P W,GARCIA J M, BAIR S S, et al. Lu-bricant chemistry and rheology effects on hydraulic mo-tor starting efficiency [ J ]. Tribology Transactions,2012,55(5): 549 - 557.
4YANG L, NIE S,YIN S, et al. Numerical and experi-mental investigation on torque characteristics of seawaterhydraulic axial piston motor for underwater tool system[J]. Ocean Engineering, 2015 ?104(8) : 168 - 184.
5WANG Z,GU L, LI L. Experimental studies on the o-vcrall efficiency performance of axial piston motor with alaser surface textured valve plate [J]. Proceedings of theInstitution of Mechanical Engineers, Part B: Journal ofEngineering Manufacture, 2013. 227(7) : 1049 - 1056.
7MILLER M K, KHALID H, MICHAEL P W,et al.An investigation of hydraulic motor efficiency and iri-bological surface properties [ J ]. Tribology Transac-tions, 2011,57(4) ; 622 - 630.
8WANG Z,(jU L,LI L. Experimental studies on theoverall efficiency performance of axial piston motorwith a laser surface textured valve plate [J]. Proceed-ings of the Institution of Mechanical Engineers Part BJournal of Engineering Manufacture, 2013, 227 ( 7 ):1049 — 1056.
9OSIPOV V,VOROTYNTSEV B, STAZHKOV S? etal. Axial piston hydraulic motor with heightened con-trol range [J]. Procedia Engineering,201 5 , 100(2):1455 - 1458.
10KUMARS, BERGADA J M,WATTON J. Axial pistonpump grooved slipper analysis by CFD simulation of thret-dimensional NVS equation in cylindrical coordinates[J].Computers and Fluids* 2009,38(3) : 648 - 663.