A profile design method to improve the wear performance of misaligned water‐lubricated bearing

2021 ◽  
Author(s):  
Jiefu Wang ◽  
Yanfeng Han ◽  
Zhibo Geng ◽  
Guo Xiang ◽  
Jiaxu Wang ◽  
...  
Keyword(s):  
Design Method ◽  
Wear Performance ◽  
Profile Design

Design Method for Screw Forming Cutter Based on Tooth Profile Composed of Discrete Points

2015 ◽  
Vol 137 (8) ◽  
Author(s):  
Qian Tang ◽  
Yuanxun Zhang ◽  
Zhenwei Jiang ◽  
Di Yan
Keyword(s):  
Interpolation Method ◽  
Design Method ◽  
Spline Interpolation ◽  
Technical Difficulty ◽  
Spatial Location ◽  
Tooth Profile ◽  
Cooperative Motion ◽  
Location Parameters ◽  
Profile Design ◽  
Screw Rotors

The forming method has been widely used for manufacturing screw rotors with helical profile. This paper takes the manufacturing of screws for screw pumps as an example and uses the cubic spline interpolation method to obtain the tooth profile of the screw forming cutter according to the tooth profile at any end section of screws composed of discrete points and based on the principle of gearing mesh. Furthermore, this paper studies the space enveloping and geometric characteristics between the screw and cutter during the manufacturing process, combines the shape of the contact line, which is generated due to the cooperative motion of the machine tool, screw, and cutter, with spatial location parameters, and thus innovatively proposes a design method for the screw forming cutter based on discrete points, namely, the form-position geometric method (FPGM). It can be seen after comparing the proposed method with the principle of gear meshing that the cutter-workpiece enveloping solution model, simplified by the FPGM, can overcome the key technical difficulty, i.e., it is difficult to accurately calculate the cusp of the tooth curve; meanwhile, the proposed method can improve the precision of the cutter tooth profile design. Finally, the feasibility and superiority of FPGM are verified by experiments.

Research on Tooth Profile Design of Spur Gears Based on Line of Action

2013 ◽  
Vol 631-632 ◽  
pp. 817-823
Author(s):  
Jian Wang ◽  
Liang Hou ◽  
Shan Ming Luo
Keyword(s):  
Mathematical Model ◽  
Design Method ◽  
Tooth Profile ◽  
Spur Gears ◽  
On Line ◽  
Profile Design ◽  
The Mathematical Model

This paper aims to propose a design method for tooth profiles of spur gears based on given line of action. A simplified derivation of the mathematical model of tooth profiles is introduced according to the meshing theory. Tooth profiles of spur gears, using a parabola as line of action, is established. The result shows that it will be better to control the performances of a gear set by specifying the shape of the line of action rather than specifying tooth profiles of mating gear.

A new profile design method for conjugate pump and its performance analysis

2015 ◽  
Vol 25 (4) ◽  
pp. 345-358
Author(s):  
Hui Wang ◽  
Jianli Wang ◽  
Jinhao Liu
Keyword(s):  
Performance Analysis ◽  
Design Method ◽  
Profile Design

scholarly journals A Fast Interactive Two-Dimensional Blade-to-Blade Profile Design Method

1988 ◽  
Author(s):  
G. D. Willis ◽  
A. Goulas
Keyword(s):  
Design Method ◽  
Axial Flow ◽  
Design Procedure ◽  
Type Model ◽  
Two Dimensional ◽  
Blade Profile ◽  
Original Design ◽  
Integral Boundary ◽  
Design Program ◽  
Profile Design

To help with the design of axial flow steam turbine blading a suite of flow analysis programs has been adapted and developed. Effort has been concentrated on improving the blade-to-blade analysis and developing a two-dimensional blade-to-blade profile design method. The development and verification of the analysis program have already been reported in detail (Willis, 1987 and Willis and Goulas, 1987). This paper presents the design or inverse solution. The analysis method uses an inviscid stream function solution coupled with an integral boundary layer calculation. In the design program the required changes in the blade geometry are effected via a transpiration type model. It is therefore a ‘profile refinement’, rather than an ‘original’ design procedure, and is necessarily an iterative solution. A required velocity distribution may be specified over only part of the blade surface. Two examples are presented in this paper to illustrate the capability of the design program.

scholarly journals Turbine blade profile design method using Bezier curves

2017 ◽  
Author(s):  
Vladimir Gribin ◽  
Aleksandr Tishchenko ◽  
Ilya Gavrilov ◽  
Victor Tishchenko ◽  
Ivan Sorokin ◽  
...  
Keyword(s):  
Turbine Blade ◽  
Design Method ◽  
Blade Profile ◽  
Bezier Curves ◽  
Bézier Curves ◽  
Profile Design

A New Efficient Thickness Profile Design Method for Streamlined Airborne Radomes

2017 ◽  
Vol 65 (11) ◽  
pp. 6190-6195 ◽  
Author(s):  
Wanye Xu ◽  
B. Y. Duan ◽  
Peng Li ◽  
Yuanying Qiu
Keyword(s):  
Design Method ◽  
Thickness Profile ◽  
Profile Design

Bending Die Design for a Pre-Formed Sheet Metal with a Golden Finger Feature

2008 ◽  
Vol 594 ◽  
pp. 51-56
Author(s):  
Jinn Jong Sheu ◽  
Sheng Hao Fang
Keyword(s):  
Shear Stress ◽  
Material Flow ◽  
Quality Index ◽  
Design Method ◽  
Maximum Shear Stress ◽  
Die Design ◽  
Von Mises Stress ◽  
Design Parameters ◽  
Profile Design ◽  
Von Mises

In this paper, authors proposed an effective quality index of bending operation and a new punch profile design method to prevent defects. The proposed quality index is presented in terms of distance of fracture location with respect to the topmost plane of blank, the maximum von Mises stress, and the maximum shear stress. The Taguchi method with L18 orthogonal array was adopted to evaluate the effects of design parameters and find out the optimum design of punch profile. A new punch feature called “golden finger” was proposed to control the material flow and move the fracture defects out of the trimming line. The results of this study had demonstrated the optimum die design can be achieved with the proposed golden finger feature to obtain a sound product.

Application of a 3D Blade Design Method for Supersonic Vaneless Contra-Rotating Turbine

2008 ◽  
Author(s):  
Xiang-Jun Fang ◽  
Si-Yong Liu ◽  
Ping Wang ◽  
Wei-Jun Zhang
Keyword(s):  
Design Method ◽  
Turbine Blades ◽  
Three Dimensional ◽  
Rotor Blades ◽  
Divergence Angle ◽  
Blade Design ◽  
Profile Design ◽  
Exit Mach Number ◽  
3D Profile ◽  
Highly Loaded

A new 3D blade design method basing on S1 surface, which is approximate the true three-dimensional flows in machinery, is presented in the paper to design the rotor blades of supersonic highly loaded vaneless contra-rotating turbine (abbr. VCRT) with large meridian passage divergence angle. The basic principle of 3D profile design is introduced. The high pressure rotor of highly loaded VCRT was designed with exit Mach number 1.33 and meridian channel divergence angle 37.3°. The results of 3D numerical simulation indicated that the distributions of dynamics parameters are well-proportioned and there are few separated flows in VCRT. Its stagnation efficiency reaches 92.3%. The results of CRT design showed that the 3D profile design method is more precise and effective than the conventional 2D cylinder method for turbine blades with large meridian expansion passage and sophisticated streamlines because the 3D features of flows are appropriately considered.

Optimal Profile Design for the Resonator Beam of an Ultrasonic Motor via Finite Element Modeling and Taguchi Methodology

2004 ◽  
Vol 126 (4) ◽  
pp. 465-475 ◽  
Author(s):  
Paul C.-P. Chao ◽  
Jeng-Sheng Huang ◽  
Chi-Wei Chiu
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Output Power ◽  
Design Method ◽  
Ultrasonic Motor ◽  
Beam Profile ◽  
Taguchi Experimental Design ◽  
Element Modeling ◽  
Experimental Design Method ◽  
Profile Design

This study presents the optimal design for the resonator beam profile of a bimodal ultrasonic motor via finite element modeling and Taguchi experimental design method. General design goals of an ultrasonic motor are to maximize the output power while restraining the contact force in order to extend component lives. To achieve the aforementioned goals, based on recent studies, beam profile design could play an important role because geometric variants of profile lead to substantial changes in the output power of the motor and simultaneously affect the contact force significantly. To investigate the effect of various profiles on the performance of the ultrasonic motor, the dynamic equations of motion are first formulated by utilizing an extended Hamilton’s principle and the method of the Lagrange multiplier. The method of finite element modeling is meanwhile used to approximate the governing partial differential equations by a discrete, finite degree-of-freedom system. With the beam outer profile parametrized by cubic splines in terms of locations of two intercepts, the Taguchi experimental design method is finally applied based on the simulated dynamics of the derived finite system to distill generic design guidelines for beam profile of the ultrasonic motor. It is found that a general paraboliclike profile for beam outer shape is best suited for maximizing output power, while a vaselike profile leads to the worst performance.

Sign in / Sign up

Export Citation Format

Share Document