..., to predict dynamic device performance as a function of error severity and as microcompressor dimensions are scaled down from the macro to micro scale. The major conclusion of this work is that since micro compressors can be made adjustable to achieve maximum compression ratio another factor besides assembly...

...Weifeng Wu; Quanke Feng; Xiaoling Yu Cylindrical milling of a screw rotor groove in a single screw compressor has higher machining efficiency than turning. However, the screw groove bottom produced by the flat end of the milling cutter fails to mesh hermetically with the flat tooth tip due...

...Weifeng Wu; Quanke Feng This paper introduces a new meshing pair profile envelope by multicolumn in single screw compressors. The screw groove flank of the new meshing pair is a multisegment surface, and the star-wheel tooth flank consisted of multicylindrical surfaces. When the compressor...

... displacement machines. Rotor-housing arrangement for Case Study 1 20 02 2007 13 06 2007 16 04 2008 compressors machine tools process design rotors shafts A positive displacement machine processes its working fluid by confining it to a sealed volume that decreases...

...Yu-Ren Wu; Zhang-Hua Fong This paper proposes a method for designing the rotor profiles of twin-screw compressors using a rack defined in the normal plane. All tooth profile segments are explicitly defined as tangent continuous in the normal section to generate a pair of conjugated rotors...

...Apurva Kumar; Andy J. Keane; Prasanth B. Nair; Shahrokh Shahpar This paper is concerned with robust aerodynamic design of compressor blades against erosion. The proposed approach combines a multiobjective genetic algorithm with geometry modeling methods, high-fidelity computational fluid dynamics...

... model. Cost tolerance data obtained from Bjørke are used to calculate the machining cost. The asymmetric quadratic quality loss model is used to calculate quality loss caused by the deviation and the mean-shift of distributions. Tolerance allocation of a sliding vane rotary compressor is optimized...

..., the determination of the neat turbine power by a mathematical model using some experimental data is also made. Lastly, a comparison with the original hydrodynamic bearings is presented. Some discussions are also developed. 21 03 2004 30 03 2005 compressors machine bearings diesel engines...

...Chunpeng Dou; Xinjiang Yang; Changqing Tian; Xianting Li The performance of control valve is analyzed in this paper in order to study characteristics of the variable displacement wobble plate compressor. The forces acting on the control valve are analyzed and the mathematical model to analyze its...

... DESIGN . Manuscript received May 2000. Associate Editor: M. Raghavan. 01 May 2000 machine theory friction wear stress analysis machine protection compressors rotors Dynamic Behavior Vane Machine Compressor A sliding vane machine has many advantages such as simple...

...W. Zhou; J. Kim; W. Soedel In a typical computer simulation of positive displacement compressors, the mathematical equations that model the compressor process are integrated in the time domain starting from a set of assumed initial conditions. The simulation has to be continued for enough...

...Yuan Mao Huang, Professor; Yung-Shane Liaw, Research Assistant The purpose of this study was to analyze the impact of blades with slots in a rotary compressor. The equations for contact forces were derived from Newton’s law. Updated moving Lagrangian descriptions with the hybrid technique...

...Shyh-Haur Su, Graduate Student; Ching-Huan Tseng, Professor This paper proposes a systematic synthesis method for twin-screw rotor profiles for compressors. Both “original generating curves” and “generated curves” are distributed on each rotor profile, and all the geometric parameters...