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. Numerical comparisons between the two types of screw rotor tooth profile design, one based on a normal system, the other on an axial system, show the advantages of using the normal-rack generation method (NRGM). Most particularly, this method allows the same hob used for screw rotors to be used to manufacture mating rotors even as the helix angle varies, because in a normal system the circular pitch remains the same. The numerical results also indicate that the rotor tooth thickness generated by the NRGM rack cutter can prevent serious deflection for a variety of helix angles and tooth combinations.
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April 2008
Research Papers
Rotor Profile Design for the Twin-Screw Compressor Based on the Normal-Rack Generation Method
Yu-Ren Wu,
Yu-Ren Wu
Graduate Student
Department of Mechanical Engineering,
National Chung-Cheng University
, No. 168, University Road, Min-Hsiung, Chia-Yi 621, Taiwan, R.O.C
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Zhang-Hua Fong
Zhang-Hua Fong
Professor
Department of Mechanical Engineering,
e-mail: imezhf@ccu.edu.tw
National Chung-Cheng University
, No. 168, University Road, Min-Hsiung, Chia-Yi 621, Taiwan, R.O.C
Search for other works by this author on:
Yu-Ren Wu
Graduate Student
Department of Mechanical Engineering,
National Chung-Cheng University
, No. 168, University Road, Min-Hsiung, Chia-Yi 621, Taiwan, R.O.C
Zhang-Hua Fong
Professor
Department of Mechanical Engineering,
National Chung-Cheng University
, No. 168, University Road, Min-Hsiung, Chia-Yi 621, Taiwan, R.O.Ce-mail: imezhf@ccu.edu.tw
J. Mech. Des. Apr 2008, 130(4): 042601 (8 pages)
Published Online: March 5, 2008
Article history
Received:
November 1, 2006
Revised:
April 3, 2007
Published:
March 5, 2008
Citation
Wu, Y., and Fong, Z. (March 5, 2008). "Rotor Profile Design for the Twin-Screw Compressor Based on the Normal-Rack Generation Method." ASME. J. Mech. Des. April 2008; 130(4): 042601. https://doi.org/10.1115/1.2839003
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