Geometry of screw compressor rotors and their tools

Stošić, Nikola; Smith, Ian K.; Kovačević, Ahmed; Mujic, Elvedin

doi:10.1631/jzus.a1000393

Cited by 46 publications

(28 citation statements)

References 7 publications

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“…One of the most common tools for working on the surfaces of the compressor unit and the pump screws is a disc cutter [1][2][3] having rotation surface as a working, or shaping, surface.…”

Section: Study Subjectmentioning

confidence: 99%

“…Contemporary CAD systems employing the capabilities of their mathematical kernels based on 2D and 3D modeling allow to achieve a whole new level of the contouring problem solution [3,5]. To prove that statement, the computer solution of the problem of contouring the disc tool for the machining of the driving screw of a three-screw pump is provided.…”

Section: Computer Modeling Based Contouring Of the Disc Tool Used In mentioning

confidence: 99%

“…1a) used in most commercial three-screw pumps [3] is taken for the screw profile at the front section (xy-plane of the section is in perpendicular to z axis of the screw). A general epicycloid equation used for forming the screw profile at the front section is given by:…”

Section: The Development Of the Electronic Solid Model Of A Pump Crewmentioning

confidence: 99%

“…thread section, number of threads, thread angle and screw length, are among the main parts of a screw compressor unit and a screw-type pump [1][2][3]. The screws are to be manufactured with high accuracy largely depending on the contouring precision of the cutting tools treating the screws.…”

Section: Introductionmentioning

confidence: 99%

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Computer Modeling of a Pump Screw and Disc Tool Cross Shaping Process

Lyashkov

Panchuk

2015

Procedia Engineering

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The article describes the method of computer contouring of disc tools for pump screws and compressor units treatment. The described method is based on the usage of mathematical kernel and software of a modern graphical CAD system. The method does not require to use mathematical models for solving the contouring problem under consideration. Hence this does not call for the usage of the characteristic numerical computation methods. Moreover, the proposed method allows the visualization of the screw and tool shaping surfaces physical interaction and the optimization of the contouring process at the visualization level.

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“…One of the most common tools for working on the surfaces of the compressor unit and the pump screws is a disc cutter [1][2][3] having rotation surface as a working, or shaping, surface.…”

Section: Study Subjectmentioning

confidence: 99%

Section: Computer Modeling Based Contouring Of the Disc Tool Used In mentioning

confidence: 99%

Section: The Development Of the Electronic Solid Model Of A Pump Crewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Computer Modeling of a Pump Screw and Disc Tool Cross Shaping Process

Lyashkov

Panchuk

2015

Procedia Engineering

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“…The milling machining is most widely used, because of its high efficiency and good stability [3][4][5][6][7]. In screw milling processing, the precise calculation of cutter profile for formed milling cutter is the key to realize high precision machining, and it is also the foundation of manufacturing formed milling cutter [8][9][10][11]. According to the characteristic parameters of progressing cavity pump, Mimmi and Pennacchi had established the screw model and determined the contact line between cutter and screw to get the cutter profile [12].…”

Section: Introductionmentioning

confidence: 99%

Design of Formed Milling Cutter for Double-Helix Screw Based on Noninstantaneous Envelope Method

Fan

Yong-jun

2013

Advances in Mechanical Engineering

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The design theory and method of formed milling cutter for double-helix screw of progressing cavity pump are presented. Through analyzing the shape and characteristic parameters of double-helix screw, the helicoids equation and axial curve equation of doublehelix screw were established. According to the relative position relations between formed milling cutter and double-helix screw in the machining process, the geometric mapping relationship of screw coordinate system and formed milling cutter coordinate system was established by using the coordinate transformation theory. Based on noninstantaneous envelope method and the meshing conditions between formed milling cutter and double-helix screw, the contact line equations were established by minimum value method. By analyzing the machining errors caused by resharpening the formed milling cutter, the tooth back curve equation was established based on spiral of Archimedes, and the profile equation of formed milling cutter with constant back angle was got. On this basis, the formed milling cutter of processing double-helix screw was designed, and the cutter head and tool post were manufactured, respectively. The measuring results have shown that this method can satisfy the requirements of machining accuracy for double-helix screw. So this is an effective method to get formed milling cutter profile for double-helix screw.

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A novel method for rotor profile optimization of high temperature screw expanders employed in waste heat recovery systems

et al. 2021

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High temperature expanders have always been employed in industrial waste heat recovery systems, where twin-screw expanders were frequently adopted.However, the significant thermal deformation of rotors contributes to much technical difficulty on the designation and manufacturing of high temperature twin-screw expanders. The profile should be optimized with consideration of its thermal deformation in high temperature working conditions. In this article, a novel method for twin-screw expander profile optimization is developed.The thermal deformation of rotors is considered with meshing pair rules and interlobe clearance presetting. Theoretical analysis on interlobe clearance is made any steam inlet temperature from 20 C to 400 C, while experimental facility was built to figure out its reliability at high temperature. The optimized profile proved the effectiveness of this method. The clearance decreases significantly, decreasing from 1.28 mm at the working temperature of 20 C to 0.16 mm at 400 C. The testing results illustrated that the significant thermal deformation of rotors causes much interlobe abrasion once the operating temperature reached 400 C. With clearance of 0.1 mm and the radius correction angle of 0.0758 , the screw expander was proved to be reliably working at 400 C.

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Geometry of screw compressor rotors and their tools

Cited by 46 publications

References 7 publications

Computer Modeling of a Pump Screw and Disc Tool Cross Shaping Process

Computer Modeling of a Pump Screw and Disc Tool Cross Shaping Process

Design of Formed Milling Cutter for Double-Helix Screw Based on Noninstantaneous Envelope Method

A novel method for rotor profile optimization of high temperature screw expanders employed in waste heat recovery systems

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