Modeling and analysis of the working process of the flat valve system of Mechanical Hydraulic Confined Piston Engine

2011 ◽  
Author(s):  
Bobo Xing ◽  
Tiezhu Zhang ◽  
Wei Huo ◽  
Hongxin Zhang
Keyword(s):  
Piston Engine ◽  
Working Process ◽  
Modeling And Analysis ◽  
Valve System

Dynamic Study of Valve Train for Rotary Piston Engine

2012 ◽  
Vol 184-185 ◽  
pp. 170-174
Author(s):  
Lei Zhang ◽  
Cun Yun Pan ◽  
Xiao Chong Wang ◽  
Hao Deng ◽  
Hu Chen
Keyword(s):  
Dynamic Response ◽  
Response Curve ◽  
Dynamic Performance ◽  
Dynamic Study ◽  
Valve Train ◽  
Piston Engine ◽  
Valve System ◽  
Rotary Engine ◽  
Dynamic Character ◽  
Dynamical Method

Rotary Piston Engine is a new kind of rotary engine. To analyze the dynamic character of the valve system, kinematics equations are established using dynamical method. Dynamic response of the valve is studied by calculating the outcome using numerical method.FFT analysis is applied here to analyze the response curve. The result shows that the Valve Train covers the basic need, but the dynamic performance of the system still could be improved.

Mechanical and System Simulation Modeling and Analysis of Surge Relief Valve

2020 ◽  
Author(s):  
Hao Zhou ◽  
Changqun Yang ◽  
Jun Yuan ◽  
Shengdun Zhao ◽  
Yuyang Chen ◽  
...  
Keyword(s):  
Closing Time ◽  
Working Process ◽  
Relief Valve ◽  
Modeling And Analysis ◽  
Oil Pipeline ◽  
Outlet Pressure ◽  
Oil Transportation ◽  
Pressure Pipes ◽  
And Performance ◽  
Pilot Valve

Abstract Surge pressure relief valve is widely used in oil transportation. When water hammer occurs in the pipeline, the valve shall be opened in time to release the high pressure so as to ensure the safety of the oil pipeline. This paper discusses the structure and principle of the surge relief valve. Combined with the working process, the stress and working state of the main valve and the pilot valve are analyzed. The mechanical model of the pilot valve is established. This paper focuses on the analysis of the parameters affecting the closing process of the main valve. The relevant laws of the structure and performance parameters of the pilot valve to the main valve closing are obtained. The model of relief valve is modeled and simulated in detail by the AMESim software. The dynamic characteristics of the surge relief valve are analyzed and the correctness of the main parameters and rules that affect the main valve closing is verified by using the model. According to the analysis and simulation results, the friction force of the pilot valve can only affect whether the two valves can close normally. The closing time of the main valve is inversely proportional to the diameter of the inlet pressure orifice. In the normal operating range, the closing time of main valve gradually increases with the diameter of outlet pressure pipes, but does not change with the length of outlet pressure pipes.

Numerical Assessment of the Rates of Solid Fuel Combustion Reactions and Their Impact on the Working Process of a Solid-Fuel Piston Engine

2021 ◽  
Author(s):  
Evgen Belousov ◽  
Andrii Marchenko ◽  
Igor Gritsuk ◽  
Mykola Bulgakov ◽  
Serhiy Kravchenko ◽  
...  
Keyword(s):  
Solid Fuel ◽  
Fuel Combustion ◽  
Piston Engine ◽  
Working Process ◽  
Numerical Assessment ◽  
Solid Fuel Combustion

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.

Analysis on Energy-Flow of a Bipropellant-Powered Hydraulic Free Piston Engine

2011 ◽  
Vol 121-126 ◽  
pp. 3102-3106
Author(s):  
Bi Zhong Xia ◽  
Gang Su ◽  
Hai Bo Xie ◽  
Hua Yong Yang
Keyword(s):  
Energy Flow ◽  
Maximum Speed ◽  
Piston Engine ◽  
Working Process ◽  
Free Piston ◽  
Heating Value ◽  
Working Cycle ◽  
Free Piston Engine ◽  
New Type ◽  
Working Efficiency

Bipropellant-powered hydraulic free piston engine (BHFPE), as a new type of HFPE, takes advantage of bipropellant in place of conventional fossil fuel, and adopts a catalytic ignition instead of the conventional spark or compression ignition. In this paper, the operational principle and working process of a BHFPE are described firstly, then the chemical formula and molar mass as well as the heating value of the bipropellant i.e. kerosene/HTP combination are dealt with respectively. Thereafter analysis on the internal energy-flow i.e. energy input, transfer, dissipation and output, during a working cycle of the BHFPE are analyzed. Additionally the operating parameters such as working efficiency, maximum speed of the free piston assembly (FPA) and the output hydraulic energy are derived.

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

Collaborative Design Optimization of Main Movement System of Hydraulic Piston Engine

2012 ◽  
Vol 605-607 ◽  
pp. 448-452
Author(s):  
Dian Lun Xue ◽  
Hong Xin Zhang ◽  
Ying Liu
Keyword(s):  
Collaborative Design ◽  
Optimization Method ◽  
Collaborative Optimization ◽  
Connecting Rod ◽  
Piston Engine ◽  
Working Process ◽  
New Type ◽  
Movement System ◽  
Optimizing Model ◽  
Type Power

Hydraulic confined piston engine (HCPE) is a new type power device directly turning indicating work into hydraulic power, whose working process is related to many disciplines. The optimal design of its main movement system is very important for improving performance. Based on the minimum volume, the MDO model was constructed. The model includes systematic level optimizing model and disciplinary level optimizing model of crankshaft and connecting rod. Computed with collaborative optimization method, the total volume reduces by 12.62%, among which the volume of connecting rod increases by 9.26%, but crankshaft reduces by 14.06%. The result is more integrally optimal because of considering the collaborative effect between subsystems.

Modeling and Analysis of the Scavenging System for a Two-Stroke Cycle Hydraulic Free Piston Engine

2013 ◽  
Vol 690-693 ◽  
pp. 3166-3169
Author(s):  
Ying Xiao Yu ◽  
Zhao Cheng Yuan ◽  
Jia Yi Ma ◽  
Peng Li
Keyword(s):  
Gas Flow ◽  
Design Requirement ◽  
Piston Engine ◽  
Free Piston ◽  
Modeling And Analysis ◽  
Free Piston Engine ◽  
Wheel Drive ◽  
Perfect Mixing ◽  
Scavenging Efficiency ◽  
Stroke Cycle

A prototype of hydraulic free piston engine (HFPE) is being designed and constructed by Jilin University to achieve direct hydraulic wheel-drive and replace the current hydraulic drivers. This paper is aimed at modeling and analyzing the scavenging system for the HFPE. Based on the prototype engine E150, two stroke scavenging system for HFPE has been designed by analogy, the gas flow of HFPE during the scavenging process is simulated by using the commercial CFD software AVL FIRE. So some key scavenging parameters and flow field were obtained, the simulated results indicate that scavenging efficiency of loop scavenging system can meet the design requirement, it lies between perfect displacement and perfect mixing scavenging, and keeps decreasing while the operation frequency keeps increasing.

Sign in / Sign up

Export Citation Format

Share Document