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Shouguo Cheng - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear Dynamic Analysis of Reciprocating Compressor Considering Different Clearance
2019 3rd International Conference on Electronic Information Technology and Computer Engineering (EITCE), 2019Co-Authors: Shouguo ChengAbstract:The dynamic model of Reciprocating Compressor was established, and then it's dynamic behavior with different clearance was studied. The effect of clearance is modeled by elastic damped internal force to establish collision contact relationship. The dynamic simulation of Reciprocating Compressor under different crankshaft speeds and different clearance is carried out respectively. From the simulation results, it can be seen that the dynamic behavior of Reciprocating Compressor is greatly affected by different clearance and crankshaft speed. The number and time interval of two large contact collisions are directly related to crankshaft speed. Clearance shapes have little effect on two large collision frequencies and collision intervals. The Lyapunov exponent is used to study the nonlinear characteristics of the system. The results show that chaos occurs when the system contains different clearance.
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nonlinear dynamic response of Reciprocating Compressor system with rub impact fault caused by subsidence
Journal of Vibration and Control, 2019Co-Authors: Shungen Xiao, Feng Jiang, Mengmeng Song, Shulin Liu, Shouguo ChengAbstract:In this paper, a nonlinear dynamic model of the single-stage Reciprocating Compressor system with a rub-impact fault caused by subsidence is developed, considering the piston rod flexibility. Meanw...
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Dynamic analysis of Reciprocating Compressor with a translational joint clearance
Vibroengineering PROCEDIA, 2018Co-Authors: Shouguo ChengAbstract:Due to the relative movement between the crosshead and the guide of Reciprocating Compressor, there must be friction, wear and movement clearance between them. When the clearance reaches a certain value, the performance of the Reciprocating Compressor is seriously affected, and the safety of the equipment and operator is threatened. In this paper, the interaction relationship between the crosshead and the guide is established through the contact collision function, and the influence of the wear amount of the crosshead and the rotational speed of the crankshaft on the Reciprocating Compressor with the clearance is studied. The nonlinear characteristics of the system are analyzed by phase diagram and Lyapunov exponent. The results show that the crosshead motion of Reciprocating Compressor with a translational clearance is chaotic.
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Dynamic analysis of the moving mechanism of the Reciprocating Compressor with clearance joints
'JVE International Ltd.', 2018Co-Authors: Qingfeng Xiao, Shulin Liu, Shungen Xiao, Ang Nie, Shouguo ChengAbstract:The clearance faults on joint of moving mechanism are most common in a Reciprocating Compressor. In order to investigate the relationship between the clearance faults and the dynamic behavior of the moving mechanism, a dynamic model with clearances of a Reciprocating Compressor is built via software ADAMS. We take into the clearance size and clearance number into consideration and set clearance fault on the joint between the crank and connecting rod, the joint between connecting rod and crosshead and both joints of connecting rod, exploring the effect of these factor on the dynamic response. Then we make a non-linear analysis to estimate the chaos behavior. In the end, we conclude that the clearance size and the number of clearance both strongly influence the dynamic behaviors of the moving mechanism, so do the position where clearance fault happens. As the clearance size increases or the number of clearance fault increase, the acceleration will oscillate more violent and have higher amplitude, furthermore, it is more possible to show chaotic behaviors
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A parametric study on the dynamic response of Reciprocating Compressor with a revolute clearance joints
Vibroengineering PROCEDIA, 2017Co-Authors: Shouguo ChengAbstract:Due to the friction and manufacturing and assembly errors, the clearance of revolution joints is unavoidable. When the clearance value increases to a certain value, the influence of clearance on the performance of the equipment could not be ignored. In this paper, the contact collision model is used to describe the effect of clearance. The model of Reciprocating Compressor is simplified properly, and the influence of revolution joint clearance on the system is studied by contact impact function. The influence of parameters on the acceleration of piston is studied by changing the size, position of clearance and velocity of crankshaft. The Lyapunov exponent of crosshead acceleration under the condition of load and no load are compared, which lays the foundation for studying the vibration of Reciprocating Compressor caused by clearance.
Shungen Xiao - One of the best experts on this subject based on the ideXlab platform.
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nonlinear dynamic response of Reciprocating Compressor system with rub impact fault caused by subsidence
Journal of Vibration and Control, 2019Co-Authors: Shungen Xiao, Feng Jiang, Mengmeng Song, Shulin Liu, Shouguo ChengAbstract:In this paper, a nonlinear dynamic model of the single-stage Reciprocating Compressor system with a rub-impact fault caused by subsidence is developed, considering the piston rod flexibility. Meanw...
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Dynamic behavior analysis of Reciprocating Compressor with subsidence fault considering flexible piston rod
Journal of Mechanical Science and Technology, 2018Co-Authors: Shungen Xiao, Feng Jiang, Hongli Zhang, Mengmeng SongAbstract:Subsidence wear is inevitable in a Reciprocating Compressor system, but how to induce body vibration is not clear. We investigated the dynamic behavior of a Reciprocating Compressor system with subsidence fault considering a flexible piston rod. The flexible piston rod was modeled as a cantilever beam. The dynamic model, in which the influence of the subsidence size, variational cylinder pressure, impact effects and piston rod flexibility are taken into account, was established. Influences of the four parameters including subsidence size, vertical force of flexible piston rod, cylinder pressure and crankshaft speed were analyzed in the dynamic response. Numerical results reveal that with the change of the four parameters, the existence of subsidence fault has a significant effect on the displacement, velocity and acceleration of the crosshead in the transverse direction, but only conspicuously affects the acceleration in the longitudinal direction. In addition to cylinder pressure, the larger the values of the other three parameters, the greater the influences. The cylinder pressure is a time-varying working load. Not only the cylinder pressure but also the open/close time of the valves and change rate of the pressure all affect the dynamic behavior of the system with subsidence. Meanwhile, the change in the vertical force of the flexible piston rod has a remarkable effect on the jump position of the crosshead, but the effect of other parameters is not obvious. In addition, the changes of parameters produce obvious influences on the impact force and the impact range of the crosshead. The stability of the Reciprocating Compressor system was studied using Poincare portraits method. The result shows that the system with subsidence fault has chaotic behavior.
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Dynamic analysis of the moving mechanism of the Reciprocating Compressor with clearance joints
'JVE International Ltd.', 2018Co-Authors: Qingfeng Xiao, Shulin Liu, Shungen Xiao, Ang Nie, Shouguo ChengAbstract:The clearance faults on joint of moving mechanism are most common in a Reciprocating Compressor. In order to investigate the relationship between the clearance faults and the dynamic behavior of the moving mechanism, a dynamic model with clearances of a Reciprocating Compressor is built via software ADAMS. We take into the clearance size and clearance number into consideration and set clearance fault on the joint between the crank and connecting rod, the joint between connecting rod and crosshead and both joints of connecting rod, exploring the effect of these factor on the dynamic response. Then we make a non-linear analysis to estimate the chaos behavior. In the end, we conclude that the clearance size and the number of clearance both strongly influence the dynamic behaviors of the moving mechanism, so do the position where clearance fault happens. As the clearance size increases or the number of clearance fault increase, the acceleration will oscillate more violent and have higher amplitude, furthermore, it is more possible to show chaotic behaviors
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Dynamic analysis of Reciprocating Compressor with clearance and subsidence
Journal of Vibroengineering, 2017Co-Authors: Shungen Xiao, Shouguo Cheng, Mengmeng SongAbstract:In this paper, the Reciprocating Compressor with clearance and subsidence of the crosshead is studied, considering the varying cylinder pressure. To investigate the nonlinear dynamical behaviors of the Reciprocating Compressor precisely, a novel dynamic model of the Reciprocating Compressor of single cylinder with clearance and subsidence for the varying cylinder pressure is established based on the Lagrangian approach. It is demonstrated that different clearance sizes, subsidence sizes and crankshaft angular velocities can affect the dynamic response of the crosshead in the horizontal direction, respectively. The analysis results of dynamic response illustrate that with the increase of clearance sizes and subsidence sizes, the influence of crosshead displacement, velocity and acceleration increase, but the effect of clearance is much stronger than subsidence. Fast Fourier transformation is also applied to analyze the frequency spectrum of the system response. Moreover, the stability of the motion is studied using phase trajectories, maximum Lyapunov exponents and Poincare sections. Numerical solution results show that clearance sizes, subsidence sizes and crankshaft angular velocities change the dynamical behavior of the system. Through calculation of the maximum Lyapunov exponents and Poincare portraits, the results reveal that the Reciprocating Compressor system is characterized by chaotic behavior with the faults of clearance and subsidence. Furthermore, with the increase of the clearance sizes and the crankshaft angular velocities, the shapes of chaotic phase trajectories have changed greatly, and varied inconspicuously with the increase of subsidence sizes in Reciprocating Compressor system.
Weirong Hong - One of the best experts on this subject based on the ideXlab platform.
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Valve dynamic and thermal cycle model in stepless capacity regulation for Reciprocating Compressor
Chinese Journal of Mechanical Engineering, 2012Co-Authors: Weirong HongAbstract:The existing researches of stepless capacity regulation system by depressing the suction valve for reciprocation Compressor always adopt hypothesis that the Compressor valves are open or close instantaneously, the valve dynamic has not been taken account into thermal cycle computation, the influence of capacity regulation system on suction valves dynamic performance and cylinder thermal cycle operation has not been considered. This paper focuses on theoretical and experimental analysis of the valve dynamic and thermal cycle for Reciprocating Compressor in the situation of stepless capacity regulation. The valve dynamics equation, gas forces for normal and back flow, and the cylinder pressure varying with suction valve unloader moment during compression thermal cycle are discussed. A new valve dynamic model based on L-K real gas state equation for Reciprocating Compressor is first deduced to reduce the calculation errors induced by the ideal gas state equation. The variations of valve dynamic and cylinder pressure during part of compression stroke are calculated numerically. The calculation results reveal the non-normal thermal cycle and operation condition of Compressor in stepless capacity regulation situation. The numerical simulation results of the valve dynamic and thermal cycle parameters are also verified by the stepless capacity regulation experiments in the type of 3L-10−8 Reciprocating Compressor. The experimental results agree with the numerical simulation results, which show that the theoretical models proposed are effective and high-precision. The proposed theoretical models build the theoretical foundation to design the real stepless capacity regulation system.
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Valve Dynamic Characteristic and Stress Analysis of Reciprocating Compressor Under Stepless Capacity Regulation
Fluid Machinery and Fluid Mechanics, 2009Co-Authors: Jiangming Jin, Weirong HongAbstract:The method that depresses the suction valves in the partial compression stroke to realize the stepless capacity regulation for Reciprocating Compressor makes the Compressor power consumption reduce along with the decreasing of capacity. However, the operation condition of suction valves is greatly changed by this method and it is necessary to analyze the stress distribution of suction valve to guarantee the safety operation. In this paper, a FEA model of the suction valve used in Reciprocating Compressor with the unloader is given. It is found that there is more than one impact between valve plate and unloader prong in the process of depressing the suction valves. The impact stress and speed of the suction valve plate varying with the different assemble error or the hydraulic pressure is obtained. Compared with the normal condition, it can be seen that the maximum stresses arisen from the over-high hydraulic oil pressure or the assemble error are in an order of the plastic deformation and crack initiation.
Mengmeng Song - One of the best experts on this subject based on the ideXlab platform.
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nonlinear dynamic response of Reciprocating Compressor system with rub impact fault caused by subsidence
Journal of Vibration and Control, 2019Co-Authors: Shungen Xiao, Feng Jiang, Mengmeng Song, Shulin Liu, Shouguo ChengAbstract:In this paper, a nonlinear dynamic model of the single-stage Reciprocating Compressor system with a rub-impact fault caused by subsidence is developed, considering the piston rod flexibility. Meanw...
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Dynamic behavior analysis of Reciprocating Compressor with subsidence fault considering flexible piston rod
Journal of Mechanical Science and Technology, 2018Co-Authors: Shungen Xiao, Feng Jiang, Hongli Zhang, Mengmeng SongAbstract:Subsidence wear is inevitable in a Reciprocating Compressor system, but how to induce body vibration is not clear. We investigated the dynamic behavior of a Reciprocating Compressor system with subsidence fault considering a flexible piston rod. The flexible piston rod was modeled as a cantilever beam. The dynamic model, in which the influence of the subsidence size, variational cylinder pressure, impact effects and piston rod flexibility are taken into account, was established. Influences of the four parameters including subsidence size, vertical force of flexible piston rod, cylinder pressure and crankshaft speed were analyzed in the dynamic response. Numerical results reveal that with the change of the four parameters, the existence of subsidence fault has a significant effect on the displacement, velocity and acceleration of the crosshead in the transverse direction, but only conspicuously affects the acceleration in the longitudinal direction. In addition to cylinder pressure, the larger the values of the other three parameters, the greater the influences. The cylinder pressure is a time-varying working load. Not only the cylinder pressure but also the open/close time of the valves and change rate of the pressure all affect the dynamic behavior of the system with subsidence. Meanwhile, the change in the vertical force of the flexible piston rod has a remarkable effect on the jump position of the crosshead, but the effect of other parameters is not obvious. In addition, the changes of parameters produce obvious influences on the impact force and the impact range of the crosshead. The stability of the Reciprocating Compressor system was studied using Poincare portraits method. The result shows that the system with subsidence fault has chaotic behavior.
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Dynamic analysis of Reciprocating Compressor with clearance and subsidence
Journal of Vibroengineering, 2017Co-Authors: Shungen Xiao, Shouguo Cheng, Mengmeng SongAbstract:In this paper, the Reciprocating Compressor with clearance and subsidence of the crosshead is studied, considering the varying cylinder pressure. To investigate the nonlinear dynamical behaviors of the Reciprocating Compressor precisely, a novel dynamic model of the Reciprocating Compressor of single cylinder with clearance and subsidence for the varying cylinder pressure is established based on the Lagrangian approach. It is demonstrated that different clearance sizes, subsidence sizes and crankshaft angular velocities can affect the dynamic response of the crosshead in the horizontal direction, respectively. The analysis results of dynamic response illustrate that with the increase of clearance sizes and subsidence sizes, the influence of crosshead displacement, velocity and acceleration increase, but the effect of clearance is much stronger than subsidence. Fast Fourier transformation is also applied to analyze the frequency spectrum of the system response. Moreover, the stability of the motion is studied using phase trajectories, maximum Lyapunov exponents and Poincare sections. Numerical solution results show that clearance sizes, subsidence sizes and crankshaft angular velocities change the dynamical behavior of the system. Through calculation of the maximum Lyapunov exponents and Poincare portraits, the results reveal that the Reciprocating Compressor system is characterized by chaotic behavior with the faults of clearance and subsidence. Furthermore, with the increase of the clearance sizes and the crankshaft angular velocities, the shapes of chaotic phase trajectories have changed greatly, and varied inconspicuously with the increase of subsidence sizes in Reciprocating Compressor system.
Michel Bernier - One of the best experts on this subject based on the ideXlab platform.
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dynamic model of a hermetic Reciprocating Compressor in on off cycling operation abbreviation Compressor dynamic model
Applied Thermal Engineering, 2010Co-Authors: Demba Ndiaye, Michel BernierAbstract:Abstract This paper presents a dynamic model of a hermetic Reciprocating Compressor in on–off cycling operation. The proposed model is detailed enough to account for the important phenomena influencing the suction and discharge mass flow rates and the electrical power drawn by the Compressor, but simple enough to be usable for different Reciprocating Compressor designs with readily available data from manufacturers. The experimental validation of the model under steady-state and transient conditions in both heating and cooling modes confirms the good performance of the model.
