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

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

Graphic Method Profiling of the End Mill Cutter Generating the Screw Compressor Rotor

2014 ◽  
Vol 658 ◽  
pp. 123-128 ◽  
Author(s):  
Camelia Lacramioara Popa ◽  
Viorel Popa
Keyword(s):  
Screw Compressor ◽  
Graphic Method ◽  
End Mill ◽  
Helical Channel ◽  
Compressor Rotor ◽  
Mill Cutter ◽  
Front Section

Helical rotors, components of screw compressors have different structural shapes: rotors circular front section, rotors elliptic front section or asymmetric rotors. Manufacturing rotors involves profiling a tool bordered by a revolution surface, enveloping of each helical channel. This paper proposes a method developed in AutoCAD, in order to determine the profile of end mill cutter which generates the helical channel. Graphic method is based on the principle of complementary theorems' "Substitute Circles Family Method" component of envelope surfaces theory.

Precision Grinding Process Design of Twin-Screw Compressor Rotor

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.

scholarly journals Rotor Tooth Profile of Screw Compressor.

1996 ◽  
Vol 62 (597) ◽  
pp. 2005-2011 ◽  
Author(s):  
Hisashi TAMURA ◽  
Kazumasa KAWASAKI ◽  
Hideaki SHIRAISHI ◽  
Masanori TANAKA
Keyword(s):  
Tooth Profile ◽  
Screw Compressor ◽  
Rotor Tooth

scholarly journals Research on Performance of Variable-Lead Rotor Twin Screw Compressor

Energies ◽  
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.

Solving the screw compressor rotor-forming grinding wheel using the edge detection method based on the graphic method

2019 ◽  
Vol 233 (5) ◽  
pp. 967-979 ◽  
Author(s):  
Jian Yang ◽  
Fang-Hong Sun ◽  
Zheng Lu
Keyword(s):  
Edge Detection ◽  
Detection Method ◽  
Grinding Wheel ◽  
Screw Compressor ◽  
Graphic Method ◽  
Grinding Wheels ◽  
Helical Surface ◽  
Compressor Rotor ◽  
Edge Detection Method ◽  
Screw Rotors

As a complex grinding wheel for special use, the screw compressor rotor-forming grinding wheel needs to be designed according to the specific profile of the workpiece. The design process is complicated and difficult to grasp, and various design issues are likely to occur. This study is based on the design theory of helical rotor-forming grinding wheels. Here, disc-shaped forming grinding wheels for machining a helical surface were studied, with discrete point workpiece cross-sections as examples. MATLAB was used as the development tool, and the Unigraphics motion simulation function was applied to establish a 3D model of screw rotors and design the forming grinding wheel for machining the helical surface. Additionally, the edge shape of the grinding wheel obtained with the analytical method and the edge shape obtained with the edge detection method based on the graphic method and the alpha-shape algorithm were compared. The results of this comparison show that the edge shape of the grinding wheel obtained by the edge detection method had high precision and was easy to solve. This method can also be used for the design of other similar conjugated products such as gears, worms, and grinding wheels. The research findings provide important reference value for the design and machining of screw rotors and grinding wheels.

scholarly journals Structural characteristics of twin-screw compressor rotor based on thermal-solid coupling method

2020 ◽  
Vol 22 (6) ◽  
pp. 1534-1546
Author(s):  
Junli Wang ◽  
Tuolei Li ◽  
Shuai Lei ◽  
Wensheng Zhang ◽  
Zhigui Ren
Keyword(s):  
Structural Characteristics ◽  
Coupling Method ◽  
Screw Compressor ◽  
Compressor Rotor ◽  
Twin Screw

scholarly journals Application of Path Homotopy in Twin Screw Compressor Rotor Profile Design

2021 ◽  
Vol 1180 (1) ◽  
pp. 012004
Author(s):  
Sumit Patil ◽  
Nikola Stosic ◽  
Ahmed Kovacevic ◽  
Ian Smith ◽  
Neeraj Asati
Keyword(s):  
Screw Compressor ◽  
Compressor Rotor ◽  
Rotor Profile ◽  
Twin Screw ◽  
Profile Design ◽  
Path Homotopy

Rotor Profile Design for the Twin-Screw Compressor Based on the Normal-Rack Generation Method

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
Yu-Ren Wu ◽  
Zhang-Hua Fong
Keyword(s):  
Helix Angle ◽  
Tooth Profile ◽  
Normal System ◽  
Rotor Profile ◽  
Twin Screw ◽  
Screw Rotor ◽  
Profile Design ◽  
Rotor Tooth ◽  
Rotor Profiles ◽  
Screw Rotors

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.

scholarly journals Grid Generation for CFD Analysis and Design of a Variety of Twin Screw Machines

Designs ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 30 ◽  
Author(s):  
Sham Rane ◽  
Ahmed Kovačević ◽  
Nikola Stošić
Keyword(s):  
Flow Analysis ◽  
Grid Generation ◽  
Cfd Modeling ◽  
Computational Grids ◽  
Screw Compressor ◽  
Analysis And Design ◽  
Positive Displacement ◽  
Compressor Rotor ◽  
Twin Screw ◽  
Dual Lead

A detailed study of the fluid flow and thermodynamic processes in positive displacement machines requires 3D CFD modeling in order to capture their real geometry, including leakage gaps. However, limitations in the conventional computational grids, used in commercial software packages, exclude their use for classical twin screw machines. The screw compressor rotor grid generator (SCORG) is a customized grid generation tool developed to overcome these limitations. This paper shows how it can be further extended to include non-conventional rotor designs, such as those with variable lead or profile variation and even internally geared machines with conical rotors. Other arrangements possible with this improvement include multiple gate rotors to increase volumetric displacement or dual lead, high wrap angle rotors for very high-pressure differences and vacuum applications. A case study of a water-injected twin screw compressor is included to demonstrate its use for both detailed flow analysis and design.

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