Rotor profile design in a hypogerotor pump

2009 ◽  
Vol 23 (12) ◽  
pp. 3459-3470 ◽  
Author(s):  
Soon-Man Kwon ◽  
Han Sung Kang ◽  
Joong-Ho Shin
Keyword(s):  
Rotor Profile ◽  
Profile Design

scholarly journals A NOVEL DESIGN OF THE ROOTS BLOWER

2019 ◽  
Vol 57 (2) ◽  
pp. 249 ◽  
Author(s):  
Tran Ngoc Tien ◽  
Nguyen Hong Thai
Keyword(s):  
Flow Rate ◽  
Volumetric Efficiency ◽  
Specific Flow Rate ◽  
Specific Flow ◽  
Rotor Profile ◽  
Profile Design ◽  
Novel Design

This paper reports a novel curve developed from non - circular gearing theory, which can be applied in rotor profile design of the two - lobe Roots blower. The formulas for calculating the volumetric efficiency and specific flow rate of the blower have also been established. To evaluate this type of the Roots blower, the volumetric efficiency and specific flow rate are being compared with those parameters of the two traditional designs and one recent variant.

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

Unification of epitrochoid origin profile design approaches for external lobed star member used in hydrostatic and gear units

2012 ◽  
Vol 227 (2) ◽  
pp. 299-310 ◽  
Author(s):  
Abhijit Nag ◽  
Rathindranath Maiti
Keyword(s):  
Geometric Design ◽  
Research Papers ◽  
Rotor Profile ◽  
The Common ◽  
Profile Design ◽  
Basic Approaches ◽  
Published Research ◽  
Initial Selection ◽  
Selection Of

We propose unification of various geometric design approaches, available in the open literatures and published research papers, for profile of star rotor used in rotary piston machines type hydrostatic units, namely pumps and motors. The star rotor profile has cycloidal root. We consider three basic approaches. These approaches are otherwise self-sufficient for profile selection purpose although the end formulae are different in relation to the common parametric terms. A closer scrutiny reveals that the initial selection of co-ordinate systems, profile generating centrode pairs and the location of the generating point lead to such differences. Our unification provides infusion and integration of three different paradigms that we have considered. This investigation is aimed at helping researchers develop a better understanding design approaches of such machines.

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 Study on the reverse design of screw rotor profiles based on a B-spline curve

2019 ◽  
Vol 11 (10) ◽  
pp. 168781401988378 ◽  
Author(s):  
Shu Cao ◽  
Xueming He ◽  
Rong Zhang ◽  
Junfeng Xiao ◽  
Guojiang Shi
Keyword(s):  
Fluid Dynamics ◽  
Fluid Simulation ◽  
Screw Compressor ◽  
B Spline ◽  
Spline Curve ◽  
Rotor Profile ◽  
Twin Screw ◽  
Screw Rotor ◽  
Profile Design ◽  
Rotor Profiles

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.

Rotor Profile Design and Motion Simulation Analysis of Hydrogen Circulating Pump

2021 ◽  
Vol 14 (4) ◽  
pp. 322-334
Author(s):  
Jiawei Lin ◽  
Lixin Zhang ◽  
Liang Dong ◽  
Houlin Liu ◽  
Cui Dai
Keyword(s):  
Simulation Analysis ◽  
Motion Simulation ◽  
Rotor Profile ◽  
Profile Design

scholarly journals Computer-Aided Design of High-Contact-Ratio Gears for Minimum Dynamic Load and Stress

1993 ◽  
Vol 115 (1) ◽  
pp. 171-178 ◽  
Author(s):  
Hsiang Hsi Lin ◽  
Chinwai Lee ◽  
F. B. Oswald ◽  
D. P. Townsend
Keyword(s):  
Dynamic Load ◽  
Computer Aided Design ◽  
Numerical Procedure ◽  
Tooth Profile ◽  
Lower Sensitivity ◽  
Contact Ratio ◽  
Profile Modification ◽  
Parabolic Profile ◽  
Profile Design ◽  
Optimum Profile

This paper presents a numerical procedure for minimizing dynamic effects on high-contact-ratio gears by modification of the tooth profile. The paper examines and compares both linear and parabolic tooth profile modifications of high-contact-ratio gears under various loading conditions. The effects of the total amount of modification and the length of the modification zone were systematically studied at various loads and speeds to find the optimum profile design for minimizing the dynamic load and the tooth bending stress. Parabolic profile modification is preferred over linear profile modification for high-contact-ratio gears because of its lower sensitivity to manufacturing errors. For parabolic modification a greater amount of modification at the tooth tip and a longer modification zone are required. Design charts are presented for high-contact-ratio gears with various profile modifications operating under a range of loads. A procedure is illustrated for using the charts to find the optimum profile design.

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