...T. H. Choi; M. S. Kim; G. S. Lee; S. Y. Jung; J. H. Bae; C. Kim In the case of internal gear pumps, the eccentricity of the outer rotor, which resembles a circular lobe, must be limited to a certain value in order to avoid the formation of cusps and loops; furthermore, the tip width of the inner...

...Jian Xu; Quanke Feng; Weifeng Wu This paper presents a new edge blunting method of the three screw pump rotor with an elliptic arc and equations of the rotor profile after edge blunting. Through comparisons of different geometrical parameters of the pump, i.e., flow area, contact line length per...

... for estimating life cycle cost of pumps using the activity based costing method. The methodology presented here is an extension of application of ABC to entire product life cycle activities. The study was conducted in a large pump manufacturing company from India that has significant global standing within its...

..., characterized by more complex rotor profiles compared with the classical epitrochoidal pumps. Suitable parameters are pointed out to completely define the geometry of the machine. In the second part of the study, proper indices are set and evaluated as functions of the design parameters, in order to evaluate...

... tradeoffs between the sizes of subproblems and coordination problems as measures of the computational costs resulting from different partitioning and coordination strategies. Promising preliminary results with small test problems are presented. The approach is illustrated on an electric water pump design...

...P. J. Gamez-Montero; R. Castilla; R. Mujal; M. Khamashta; E. Codina An innovative tool for the improvement of the design methodology of a trochoidal gear, which works as a part of a hydraulic pump, is introduced. For the past few years, new, specific, and demanding applications of this type...

... on the profile are estimated using curvature analyses. Finally, the offset concept is applied to the gerotor design. First, two conjugate curves are obtained, whose offset curves are then found. Pump performance—including area efficiency and sealing—is also compared for these designs, which include both offset...

...Y. J. Chang; J. H. Kim; C. H. Jeon; Chul Kim; S. Y. Jung A gerotor pump is suitable for oil hydraulics of machine tools, automotive engines, compressors, construction, and other various applications. In particular, the pump is an essential machine element that feeds lubricant oil in an automotive...

... generally depends upon type of use—e.g., when used as a speed reducer, it is a pin wheel. Therefore, this analysis proposes designs for both a gerotor and a speed reducer. Specifically, for an inner rotor used as a gerotor pump, it outlines a mathematical model to improve pump efficiency and derives...

...Shih-Hsi Tong, Lecturer; Daniel C. H. Yang, Professor In this paper we present a complete synthesis procedure for lobe pumps with required flow rate functions. A dimensionless flow rate expression, called the “specific flow rate,” is used for our pump synthesis. This specific flow rate depends only...

... ,” ASME J. Mech. Des. , 118 , pp. 490 – 493 . Kegl, B., and Mu¨ller, E., 1997, “Optimal Design of a Cam Profile for Diesel Injection Pump,” SAE Paper 970643. Seher, D., 1992, “Diesel-Einspritzung fu¨r weniger Emissionen bei Nutzfahrzeugmotoren,” ATZ/MTZ Sonderheft Motor und Umwelt’92 . Needham...

...M. K. Bahr Khalil; J. Svoboda, Professor; R. B. Bhat, Professor Electrically controlled swash plate axial piston pumps with conical cylinder blocks are recently used in the industry in view of their superior performance. Several studies have been carried out to study the characteristics...

...Noah D. Manring The objectives of this research are to investigate the principal advantages of using various valve-plate slot geometries within an axial piston pump. In particular, three types of geometries are considered: a constant area slot geometry, a linearly varying slot geometry...

...Noah D. Manring Many axial-piston pumps utilize a swash plate for regulating discharge flow. In this research, the required control and containment forces are examined for a cradle-mounted, axial-actuated swash plate. These forces are described in closed-form for providing the designer...

...Noah D. Manring Many axial-piston pumps utilize a swash plate for regulating discharge flow. In this research, the required control and containment forces are examined for a cradle-mounted, transverse-actuated swash plate. These forces are described in closed-form for providing the designer...

...Giovanni Mimmi; Paolo Pennacchi The aim of this paper is a detailed analysis of a particular mechanism with variable piston stroke. This crank mechanism is presently applied to metering pumps, because it allows the piston stroke to be adjusted in length and permits the pump flow to be changed also...

...Y. Yao; A. Z. Qamhiyah; X. D. Fang Hydraulic pumps and motors are widely used in mobile equipment for construction, mining and agriculture. The piston-slipper component is one of the critical parts of a hydraulic pump. A crimping process is used for connecting the piston to the slipper component...

...Hung-Cheng Liu, Graduate Student; Shih-Hsi Tong, Post-Graduate Researcher; Daniel C. H. Yang, Professor In this paper a method for the design of new rotor profiles for high-sealing lobe pump is presented. The objective of this research is to improve the sealing property of lobe pumps by designing...

...Noah D. Manring In this research, the diameter of the shaft within an axial-piston swash-plate type hydrostatic pump is considered from a stress point of view. To analyze the loading of the shaft, the components within the pump are studied using a force and torque diagram and it is shown...