Application of Path Homotopy in Twin Screw Compressor Rotor Profile Design

The female/male screw rotor profile design for a twin screw compressor poses challenges such as frequent parameter modification and a difficult-to-build performance test platform, which affect the efficiency of a rotor profile design. To address these problems, a new idea of applying a B-spline curve to a twin screw compressor rotor profile design is proposed in this article. In addition, the design result underwent fluid simulation based on fluid dynamics technology. This method overcomes the aforementioned challenges. As a meshing line has one-to-one mapping relationship with the rotor profile and reflects important performance parameters of the rotor profile, the method of deducing female and male rotor profiles for a twin screw compressor from a meshing line is proposed. Furthermore, the B-spline curve is used as a composition curve of the meshing line to achieve fast local adjustment of the rotor tooth profile. Based on existing rotor profiles, a meshing line is designed via the B-spline curve, and female and male rotor profiles are derived in reverse. The final rotor profile underwent fluid simulation via computational fluid dynamics analysis under various conditions to analyze the pattern of the internal flow field, which is compared with the results from conventional design.

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Integral Modeling of a Twin-Screw Compressor

Journal of Mechanical Design ◽

10.1115/1.4033694 ◽

2016 ◽

Vol 138 (7) ◽

Cited By ~ 1

Author(s):

Sarah Van Erdeweghe ◽

Joris De Schutter ◽

Eric Van den Bulck

Keyword(s):

Working Conditions ◽

Control Volume ◽

Optimization Procedure ◽

Future Research ◽

Screw Compressor ◽

Positive Displacement ◽

Rotor Profile ◽

Twin Screw ◽

Large Application ◽

Similarity Law

In this paper, an integral methodology for the modeling of a twin-screw compressor is presented. Starting from a known rotor profile, all the algorithms to calculate the second rotor profile, the size of the control volume, and the compressor's performance are presented. The proposed modeling approach can be applied in an optimization procedure to find the optimal rotor profiles for a given application, with corresponding working conditions. Furthermore, based on the modeling results and substantiated with measurements on different compressor types, a similarity law for positive displacement compressors seems to exist. The existence of a similarity law has large application potential as it could be used to predict the performance of a positive displacement compressor in other than the (lab) tested working conditions. Further investigation of the similarity law for positive displacement compressors is therefore proposed as a key topic for future research.

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Design of Twin-Screw Compressor Rotor Tooth Profile with Meshing Clearance Based on Graphic Method and Alpha Shape Algorithm

Journal of Shanghai Jiaotong University (Science) ◽

10.1007/s12204-021-2396-z ◽

2021 ◽

Author(s):

Jian Yang ◽

Mingzhao Xu ◽

Zheng Lu

Keyword(s):

Tooth Profile ◽

Screw Compressor ◽

Graphic Method ◽

Alpha Shape ◽

Compressor Rotor ◽

Twin Screw ◽

Rotor Tooth

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On gearing of helical screw compressor rotors

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1243/0954406981521556 ◽

1998 ◽

Vol 212 (7) ◽

pp. 587-594 ◽

Cited By ~ 34

Author(s):

N Stošić

Keyword(s):

Reverse Transformation ◽

Screw Compressor ◽

Helical Gears ◽

Rotor Profile ◽

Twin Screw

Twin-screw compressor rotors are effectively helical gears. When these are formed from a hobbing cutter, the hobbing tool and the rotor together constitute a pair of crossed helical gears. In the present paper, the envelope gearing method is used to derive a meshing condition for crossed helical gears which is then used to create the profile of a hobbing tool. A reverse transformation enables the rotor profile thereby manufactured to be calculated. Simplification of the main gearing condition leads to the meshing expression for helical gears which may be used for the design of screw compressor rotors.

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The Design of a Twin-screw Compressor Based on a New Rotor Profile

Journal of Engineering Design ◽

10.1080/09544829708907973 ◽

1997 ◽

Vol 8 (4) ◽

pp. 389-399 ◽

Cited By ~ 17

Author(s):

N. STOŠIĆ ◽

I. K. SMITH ◽

A. KOVAČEVIĆ ◽

C. A. ALDIS

Keyword(s):

Screw Compressor ◽

Rotor Profile ◽

Twin Screw

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Precision Grinding Process Design of Twin-Screw Compressor Rotor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.774-776.1107 ◽

2013 ◽

Vol 774-776 ◽

pp. 1107-1111

Author(s):

Yong Qiang Zhao ◽

Sheng Dun Zhao ◽

Hong Ling Hou

Keyword(s):

Process Parameters ◽

Grinding Wheel ◽

Screw Compressor ◽

Grinding Process ◽

Compressor Rotor ◽

Cnc Grinding ◽

Twin Screw ◽

Screw Rotor ◽

Working Parameters ◽

The Relationship

With the accuracy improvement of twin-screw compressor rotor machining, higher requirement of crew rotor grinded equipment and grinding process is put forward. Based the theory of screw grinding and CNC forming grinding wheel dress technology, the relationship between machine working parameters, CNC grinding wheel dressing parameters and screw rotor grinded process parameters are investigated, and the relationship between CNC grinding wheel dressing parameters and the screw rotor grinded process parameters is established, and its formulas are presented to describe the distances between grinding wheel axis and screw rotor axis. Through these formulas, the CNC wheel dressing program could be designed easily, the performance and efficiency of machine would be improved, and especially the machining quality of screw rotor would be enhanced and becomes more stability.

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Research on Performance of Variable-Lead Rotor Twin Screw Compressor

Energies ◽

10.3390/en14216970 ◽

2021 ◽

Vol 14 (21) ◽

pp. 6970

Author(s):

Huagen Wu ◽

Jiankang Liu ◽

Yuqi Shen ◽

Mengtao Liang ◽

Beiyu Zhang

Keyword(s):

Volume Ratio ◽

Screw Compressor ◽

Core Component ◽

The Core ◽

Compressor Rotor ◽

Twin Screw ◽

Wrap Angle ◽

Simulation Results ◽

Internal Volume ◽

Screw Rotors

Twin-screw compressors are widely used in aerodynamics, refrigeration and other fields. The screw rotors are the core component of the screw compressor and affect the performance of the compressor. This paper focuses on variable-lead rotors. A thermal process simulation model considering leakage is established to calculate the efficiency of the compressor. Different lead change methods are compared by evaluating the contact line, exhaust port and simulation results. The results show that the compressor obtains better performance when the lead decreases rapidly on the discharge side. Furthermore, the effects of the wrap angle and internal volume ratio on variable-lead rotors are studied. The work provides a reference for the design of the screw compressor rotor.

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