The Influence of Rotor Deflection upon Screw Compressor Performance
نویسندگان
چکیده
The compression process within screw compressors induces large pressure and temperature changes that cause the rotors to deform. To determine this effect, a 3-D numerical method has been developed to calculate flow and deformation simultaneously. This comprises a mathematical procedure to generate a numerical grid for both the solid and fluid domains, in the form of a computer program named SCORG, attached to a commercial CCM software package. The effects of rotor distortion on the compressor performance were thus determined and are presented.
منابع مشابه
Development and Application of a Software Package for the Design of Twin Screw Compressors
The development and application of a software package for the design of twin screw compressors is presented in this paper. The package can be used to calculate the rotor profile, geometrical characteristics, thermodynamic performance, forces on rotor, rotor deflection and cutter shape. A user-friendly interface and some powerful post-processing programs are also included in the package. The app...
متن کاملOptimum Rotor Geometrical Parameters in Refrigeration Helical Twin Screw Compressors
This paper presents a parameter study for optimum rotor geometrical parameter combinations of a refrigeration helical twin screw compressor with four commonly used lobe combinations and five different length/diameter ratios and wrap angles. The volumetric and indicated efficiencies of the compressor are important. So also are other factors such as rotor deflection, bearing load, bearing life an...
متن کاملCalculation of Rotor Interference in Screw Compressors
Small rotor clearances are today a vital prerequisite for an efficient screw compressor. The clearances are responsible for compressor leakages, small clearance will minimise them and thereby increase both, the volumetric and adiabatic efficiency. A continuous improvement in the rotor manufacturing equipment has been achieved during the recent years and tight production tolerances may now be ap...
متن کاملOptimisation of Screw Compressors
Increasing demands for more efficient screw compressors require that compressor designs are tailored upon their duty, capacity and manufacturing capability. A suitable procedure for optimisation of the screw compressor shape, size, dimension and operating parameters is described here, which results in the most appropriate design for a given compressor application and fluid. It is based on a rac...
متن کاملRating Technique for Refrigeration Twin-Screw Compressors
The twin-screw compressor is constantly attaJ.ninq hiqher performance due to new rotor profiles, new rotor manufacturing technology and new designs. Besides this, new refrigerants as well as new lubricants can be expected on the market. Therefore there is always a need to update performance data. To m1nimize the number of test points and still receive representative data, there 1s a need of an ...
متن کامل