Rotor Profiles Evolutionary Design and Evaluation of the Mixing Performance for Intermeshing Counter-rotating Twin-screw Kneader

2014 ◽  
Vol 50 (15) ◽  
pp. 34
Author(s):  
Jing WEI
Keyword(s):  
Evolutionary Design ◽  
Mixing Performance ◽  
Twin Screw ◽  
Rotor Profiles

Profiles evolutionary design and evaluation of mixing performance of screw elements for intermeshing counter-rotating twin-screw kneader

2016 ◽  
Vol 230 (17) ◽  
pp. 3076-3091 ◽  
Author(s):  
Jing Wei ◽  
Dongming Zhou ◽  
Aiqiang Zhang ◽  
Yuliang Yang ◽  
Dabing Chen
Keyword(s):  
Mathematical Model ◽  
Cross Section ◽  
Design Method ◽  
Design Parameters ◽  
Evolutionary Design ◽  
Mixing Performance ◽  
Distribution Density Function ◽  
Different Types ◽  
Twin Screw ◽  
Dispersive Mixing

The profile designs of screw elements are very crucial to improving the mixing performance for the intermeshing counter-rotating twin-screw kneader. In order to find the inherent law among different profiles of screw elements and to derive a mathematical model which evolves different types of end cross-section profiles of screw elements, a universal mathematical model of end cross-section profiles of screw elements is presented in this work. Different types of profiles of screw elements, including those traditionally used can be obtained by evolutionary design method after changing the tooth number of female and male elements and other design parameters. Several typical screw elements with different types of end cross-section profiles are selected to analyze the mixing performance. Spatial flow patterns in flow channel of the screw elements are presented with particle tracking analysis by using mesh superposition technology. The mixing performance of different screw elements including distributive and dispersive mixing, contrastive analysis for some parameters, such as residence time distribution density function, segregation scale, rate of stretching, rate of shear, etc. are proposed. The results in this paper provide a data basis for the profiles selection of screw element for intermeshing counter-rotating twin-screw kneader.

A Numerical Contour Method for Simulating Spiral Groove Bottom Profiles

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Weifeng Wu ◽  
Shuo Sun ◽  
Quanke Feng
Keyword(s):  
Surface Profile ◽  
Contour Method ◽  
Contact Lines ◽  
Spiral Groove ◽  
Groove Surface ◽  
Contact Points ◽  
Envelope Method ◽  
Twin Screw ◽  
Rotor Profiles ◽  
Boundary Contact

The envelope method can be used to model the spiral groove surface profile in single screw compressors produced by cylindrical milling using the contact lines of the cutter surface and the groove. However, the envelope method cannot predict the groove bottom profile accurately because it does not account for the boundary contact lines on the end face of the cutter. A new numerical contour method is proposed to model the groove bottom profile by identifying the contact points on the end face of the cutter to a set position on the spiral groove. Results show that the new method can calculate accurately both the boundary and the inner contact line and thus simulate the groove bottom profile exactly. This method could also be used to simulate other profiles of machines, such as rotor profiles of twin screw compressors and screw pumps.

scholarly journals Numerical study on mixing performance of glass fiber dispersion in a twin-screw extruder with backward-mixing elements

2015 ◽  
Author(s):  
Kunihiro Hirata ◽  
Hiroshi Ishida ◽  
Motohiro Hiragori ◽  
Yasuya Nakayama ◽  
Toshihisa Kajiwara
Keyword(s):  
Glass Fiber ◽  
Numerical Study ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Fiber Dispersion ◽  
Mixing Performance ◽  
Twin Screw

scholarly journals Evaluation of Dispersive Mixing Performance of Special Rotor Segments in an Intermeshing Co-rotating Twin-Screw Extruder

Seikei-Kakou ◽  
2012 ◽  
Vol 24 (5) ◽  
pp. 279-285
Author(s):  
Sayaka Yamada ◽  
Kazuhisa Fukutani ◽  
Yasuaki Yamane ◽  
Kazuo Yamaguchi
Keyword(s):  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Mixing Performance ◽  
Twin Screw ◽  
Dispersive Mixing

scholarly journals The optimization of Blister Disk geometry for mixing performance in co-rotating twin-screw extruder

2015 ◽  
Author(s):  
Koki Matsumoto ◽  
Natsuki Kayamori ◽  
Tatsuya Tanaka ◽  
Yoshihiko Arao
Keyword(s):  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Mixing Performance ◽  
Twin Screw

scholarly journals A geometric study of different curves for the rotor profiles of a twin-screw compressor

2021 ◽  
Vol 312 ◽  
pp. 11001
Author(s):  
Antonio Giuffrida
Keyword(s):  
Straight Line Segment ◽  
Base Case ◽  
Conic Sections ◽  
Current Case ◽  
Rotor Profile ◽  
Straight Line ◽  
Twin Screw ◽  
Rotor Profiles ◽  
Geometric Study

This paper presents the results of comparisons among some patented solutions for profiling the contours of the rotors in twin-screw compressors. Referring to a base case where all the generating curves are circumferences, patents suggesting to replace arcs of circumference with arcs of conic sections, i.e. parabola, ellipse and hyperbola, but even a straight line segment, are presented and guidelines for rotor profile construction are reported. After setting the size of the compressor, attention is paid to the inter-lobe area, as the sum of the area between two consecutive lobes in the male rotor and of the area of the groove in the female rotor. Actually, this area is strictly related to the volume displacement. Limited to the current case study, the profile including an elliptic segment seems to be the preferable solution for higher inter-lobe area, then for higher displacement, though a number of considerations should be necessary for a broader context.

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