One of the conditions for sealing in three screw pump with cycloid profiles was that the length of case must not be less than the minimum working length, so that the suction and discharge chamber could be separated strictly. This study deduced the conditions from the equation of meshing that the length of case must meet, and gave the three dimensional graph of different sealing chamber. This study provided the theoretical basis for correct determination of case length, analysis of the instantaneous flow rate, pressure distribution and volumetric efficiency in three screw pump.
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References
[1]Ryazantsev V M. Improved profiles of rotors in triplescrew pumps[J]. Chemical and Petroleum Engineering, 1981, 17(6):292-295.
[2]Mimmi G, Pennacchi P. Deviations induced by tool sharpening in the profile of three screw pump rotors[J]. Meccanica, 1997, 32(6): 567-576.
[3]《数学在螺杆泵设计与制造中的应用》编写组.数学在螺杆泵设计与制造中的应用[M].北京：科学出版社，1977.
[4]张克危.流体机械原理：下册[M].北京：机械工业出版社，2001.
[5]何存兴.液压元件[M].北京：机械工业出版社，1982.
[6]Mimmi G, Pennacchi P. Computation of pressure loads in three screw pump rotors[J]. ASME Journal of Mechanical Design, 1998, 120(4): 581-588.
[7]李福天.螺杆泵[M]. 北京：机械工业出版社，2010.
[8]Mimmi G, Pennacchi P. Dynamic effects of pressure loads in three screw pump rotors[J]. ASME Journal of Mechanical Design, 1998, 120(4):589-592.
[9]Ryazantsev V M. Radial forces and screw rigidity in a twoscrew multiphase pump[J]. Chemical and Petroleum Engineering, 2001, 37(11/12):617-622.
[10]Rbiger K, Maksoud T M A, Ward J, et al. Theoretical and experimental analysis of a multiphase screw pump, handling gasliquid mixtures with very high gas volume fractions[J]. Experimental Thermal and Fluid Science, 2008, 32(8):1694-1701.
[11]Kovacevic A,Stosic N,Smith I. Screw Compressors[M].Berlin Heidelberg:SpringerVerlag, 2007.
[12]陈惟荣.齿轮啮合理论[M].北京：煤炭工业出版社，1986.
[13]郑梅生，王兆伍，孙青云,等.用啮合理论研究三螺杆泵转子齿形[J].流体机械，2008，36(11):28-31.
[14]Mimmi G, Pennacchi P. Determination of tool profile for the milling of three screw pump rotor[J]. Meccanica, 1997, 32(4): 363-377.
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