Kineto-static modeling and analysis of differential velocity mechanism in a twin-rotor piston engine

2017 ◽  
Author(s):  
Teng-An Zou ◽  
Hai-Jun Xu ◽  
Xiao-Jun Xu ◽  
Xiang Zhang ◽  
Fa-Liang Zhou
Keyword(s):  
Piston Engine ◽  
Modeling And Analysis ◽  
Static Modeling ◽  
Twin Rotor

Modeling and Analysis on Mean Effective Torque of Rotors in Twin-Rotor Cylinder-Embedded Piston Engine

2014 ◽  
Vol 1016 ◽  
pp. 630-634
Author(s):  
Hu Chen ◽  
Cun Yun Pan ◽  
Xiao Jun Xu ◽  
Xiang Zhang ◽  
Hai Jun Xu
Keyword(s):  
Structural Parameters ◽  
Power Stroke ◽  
Force Transmission ◽  
Piston Engine ◽  
Important Indicator ◽  
Modeling And Analysis ◽  
Wear And Tear ◽  
Explosive Force ◽  
The Impact ◽  
Twin Rotor

Torque, as an important indicator of the engine, is the reflection of performance of cylinder-embedded piston engine. In power stroke, torque varies at different moments, so if the impact of structural parameters on torque needs to be analyzed, the values of torque in power stroke need to be added together and divide lasting time. The average effective torque is the average of the torque generated by explosive force during the entire power stroke, which overcomes the disadvantages of the instantaneous torque which can not reflect the changes in power process. Therefore, the influence of each structure size on the force transmission performance can be analyzed with maximizing the average effective torque. It is concluded that for increasing the average effective torque, the radius of the hinge center trajectory of cap R should be increased, and the length from rotating center O to the trajectory of piston H should be decreased. The length of rod L has little influence on the average effective torque. However, if there is a too large D-value between R and H, the rod may deflect seriously, so that the piston side force increases, causing the piston wear and tear. So the values of R and H should be selected with specified conditions in the design.

Mathematical modeling and analysis of gas torque in twin-rotor piston engine

2013 ◽  
Vol 20 (12) ◽  
pp. 3536-3544 ◽  
Author(s):  
Hao Deng ◽  
Cun-yun Pan ◽  
Xiao-jun Xu ◽  
Xiang Zhang
Keyword(s):  
Mathematical Modeling ◽  
Piston Engine ◽  
Modeling And Analysis ◽  
Twin Rotor

Mathematical modeling and analysis of thermodynamic processes in a twin-rotor piston engine

2014 ◽  
Vol 21 (11) ◽  
pp. 4163-4171 ◽  
Author(s):  
Teng-an Zou ◽  
Hai-jun Xu ◽  
Cun-yun Pan ◽  
Xiao-jun Xu ◽  
Hu Chen
Keyword(s):  
Mathematical Modeling ◽  
Piston Engine ◽  
Modeling And Analysis ◽  
Twin Rotor ◽  
Thermodynamic Processes

Research on sealing characteristics of annular power cylinder based on twin-rotor piston engine

2021 ◽  
pp. 095440622110214
Author(s):  
Dibo Pan ◽  
Haijun Xu ◽  
Bolong Liu ◽  
Congnan Yang
Keyword(s):  
Compression Ratio ◽  
Simulation Analysis ◽  
Piston Engine ◽  
Leakage Model ◽  
Gas Leakage ◽  
Power Cylinder ◽  
Sealing Performance ◽  
Piston Seal ◽  
Realization Process ◽  
Twin Rotor

The sealing characteristics of an annular power cylinder based on the Twin-rotor piston engine are studied, which provides a theoretical foundation for the sealing design of a new high-power density piston engine. In this paper, the basis thermodynamic realization process of an annular power cylinder is presented. The Runge Kutta equation is used to establish the coupled leakage model of adjacent working chambers under annular piston seal. And the sealing performance of the annular power cylinder is analyzed in detail. Moreover, the influence of rotor speed and compression ratio on the sealing characteristics and leakage is studied. Finally, some tests are carried out to verify the sealing principle and simulation results, which verifies the theoretical basis of simulation analysis. Results show that there are double pressure peaks in the leakage chamber between two working chambers, which is beneficial to reduce the leakage rate. Besides, increasing the speed and decreasing the compression ratio can help to reduce gas leakage. Furthermore, the effects of speed variation on the leakage are only significant when rotating at low speed. Changing the compression ratio has a greater effect on the slope of the leakage curve at a low compression ratio, and the lower the compression ratio, the better the sealing effect.

Structural Modal Analysis of a New Twin-Rotor Piston Engine

2013 ◽  
Vol 390 ◽  
pp. 256-260 ◽  
Author(s):  
Qiang Xie ◽  
Cun Yun Pan ◽  
Hu Chen ◽  
Zheng Zhou Zhang ◽  
Lei Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Natural Vibration ◽  
Structural Parameters ◽  
Vibration Reduction ◽  
Modal Parameters ◽  
Analysis Software ◽  
Piston Engine ◽  
Radiation Noise ◽  
Twin Rotor

With the finite analysis software ANSYS, the key parts and the whole structure of a new twin-rotor piston engine is analyzed, and then the structural modal parameters are obtained by using finite element method in the cases of free modality. Furthermore, the natural vibration characteristics of the twin-rotor piston engine are analyzed, as well as the influence of structural parameters on vibration transfer and radiation noise. The research is expected to lay a foundation for the vibration reduction design of the twin-rotor piston engine.

scholarly journals An investigation of a hypocycloid mechanism based twin-rotor piston engine

2014 ◽  
Vol 229 (1) ◽  
pp. 106-115
Author(s):  
Xiaojun Xu ◽  
Haijun Xu ◽  
Hao Deng ◽  
Fengshou Gu ◽  
Chris Talbot
Keyword(s):  
Lightweight Design ◽  
Dynamical Analysis ◽  
Design Parameters ◽  
Uniform Motion ◽  
Force Transmission ◽  
Piston Engine ◽  
Critical System ◽  
Piston Velocity ◽  
Angular Velocities ◽  
Twin Rotor

A unique mechanism is investigated in this paper to show the working principles of a novel hypocycloid twin-rotor piston engine (HTRPE), which provides the basis for the structural design, kinematic and dynamical analysis necessary to realize the engine. As a critical system for the HTRPE, the differential velocity mechanism is examined first by decomposing it into two non-uniform motion mechanisms and one hypocycloid mechanism, which allows an evaluation of different options of design parameters. Then analytical expressions are derived to calculate the rotor angular velocities and the relative angular velocities of pairs of rotors for a detailed performance analysis. Based on the results of this analysis a prototype HTRPE is proposed and benchmarked with both a conventional reciprocating and a Wankel engine. It is shown that the new engine outperforms the other two engines in key engine features including combustion gas force transmission, volumetric change of working chambers, power frequency, piston velocity and displacement, demonstrating that HTRPE is very promising as a more energy efficient engine due to its high compactness and power density, and consequently lightweight design.

Comparison of two types of twin-rotor piston engine mechanisms

2013 ◽  
Vol 20 (2) ◽  
pp. 363-371 ◽  
Author(s):  
Hao Deng ◽  
Cun-yun Pan ◽  
Xiao-cong Wang ◽  
Lei Zhang ◽  
Li Deng
Keyword(s):  
Piston Engine ◽  
Twin Rotor
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