The Experts below are selected from a list of 183 Experts worldwide ranked by ideXlab platform
Changho Kim - One of the best experts on this subject based on the ideXlab platform.
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leakage and rotordynamic analysis of a high pressure floating Ring Seal in the turbo pump unit of a liquid rocket engine
Tribology International, 2002Co-Authors: Yongbok Lee, Changho KimAbstract:Abstract The floating Ring Seal is often used in an oxidizer and a fuel pump of the turbo pump unit in the liquid rocket engine because the floating Ring Seal has the ability to minimize clearance without rubbing phenomenon. For the analysis of performance and vibration characteristics of the turbo pump unit with floating Ring Seals, the exact prediction of the lock-up position of the floating Ring is essential to evaluate the leakage and rotordynamic coefficients from the floating Ring Seal. The governing equations, which are based on the ‘bulk-flow model’, are derived from extending the eccentric annular plain Seal analysis. The solution procedure is developed by using the Fast Fourier Transform Method of Nelson and Nguyen. The results of lock-up position, attitude angle of the floating Ring, leakage flow rate, and rotordynamic coefficients are presented with operating conditions and geometric parameters of the floating Ring Seal for an example case.
P. Wang - One of the best experts on this subject based on the ideXlab platform.
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Efficiency-reinforcement Design of Hydraulic Reciprocating Sealing Element Driven by TRIZ Technology Evolution
2016Co-Authors: F. Y. Zhang, P. WangAbstract:design Abstract: The efficiency reinforcement technologies of Sealing is important for improving Sealing’s reliability and effectivity which result in zero leakage. Technology evolution of TRIZ can be used to forecast the future technology in products. These future technologies can guide a designer along the right direction of developing a new product. In this paper, the efficiency-reinforcement principle of hydrodynamic reciprocating Sealing is discussed, technology evolution of TRIZ is integrated with the efficiency reinforcement design of hydrodynamic reciprocating Sealing element to predict its future structure state. A new cross section shape of reciprocating Sealing element corresponding to the predicted structure state is presented. The computational model of the new reciprocating Seal element is established with ANSYS, and its stress, strain and pressure distribution are also analyzed. The results demonstrated that the presented Seal elemente outperforms the old O-Ring Seal in efficiency reinforcement capacity
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efficiency reinforcement design of hydraulic reciprocating Sealing element driven by triz technology evolution
Materials Science Forum, 2009Co-Authors: F. Y. Zhang, P. WangAbstract:The efficiency reinforcement technologies of Sealing is important for improving Sealing’s reliability and effectivity which result in zero leakage. Technology evolution of TRIZ can be used to forecast the future technology in products. These future technologies can guide a designer along the right direction of developing a new product. In this paper, the efficiency-reinforcement principle of hydrodynamic reciprocating Sealing is discussed, technology evolution of TRIZ is integrated with the efficiency reinforcement design of hydrodynamic reciprocating Sealing element to predict its future structure state. A new cross section shape of reciprocating Sealing element corresponding to the predicted structure state is presented. The computational model of the new reciprocating Seal element is established with ANSYS, and its stress, strain and pressure distribution are also analyzed. The results demonstrated that the presented Seal elemente outperforms the old O-Ring Seal in efficiency reinforcement capacity.
Yuan Chen - One of the best experts on this subject based on the ideXlab platform.
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experimental investigations on the effect of rod surface roughness on lubrication characteristics of a hydraulic o Ring Seal
Tribology International, 2021Co-Authors: Xudong Peng, Xiangkai Meng, Bingqing Wang, Yuan ChenAbstract:Abstract The surface roughness of friction pairs plays a significant role in the formation of hydrodynamic fluid film between rod-Seal interface. To investigate the influence of rod surface roughness on lubrication characteristics of hydraulic reciprocating Seal, the friction force and the net leakage of Seal under quasi-constant speed conditions and variable speed conditions are compared and analyzed, by using a self-designed experimental device. The results show that the rod surface roughness has an important influence on Seal behavior and cannot be ignored. The rougher the rod surface is, the greater the friction force and the net leakage are, and the Seal is more prone to meet with the rolling torsion or fatigue failures under the conditions of frequent start-up and shut-down.
Yongbok Lee - One of the best experts on this subject based on the ideXlab platform.
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leakage and rotordynamic analysis of a high pressure floating Ring Seal in the turbo pump unit of a liquid rocket engine
Tribology International, 2002Co-Authors: Yongbok Lee, Changho KimAbstract:Abstract The floating Ring Seal is often used in an oxidizer and a fuel pump of the turbo pump unit in the liquid rocket engine because the floating Ring Seal has the ability to minimize clearance without rubbing phenomenon. For the analysis of performance and vibration characteristics of the turbo pump unit with floating Ring Seals, the exact prediction of the lock-up position of the floating Ring is essential to evaluate the leakage and rotordynamic coefficients from the floating Ring Seal. The governing equations, which are based on the ‘bulk-flow model’, are derived from extending the eccentric annular plain Seal analysis. The solution procedure is developed by using the Fast Fourier Transform Method of Nelson and Nguyen. The results of lock-up position, attitude angle of the floating Ring, leakage flow rate, and rotordynamic coefficients are presented with operating conditions and geometric parameters of the floating Ring Seal for an example case.
F. Y. Zhang - One of the best experts on this subject based on the ideXlab platform.
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Efficiency-reinforcement Design of Hydraulic Reciprocating Sealing Element Driven by TRIZ Technology Evolution
2016Co-Authors: F. Y. Zhang, P. WangAbstract:design Abstract: The efficiency reinforcement technologies of Sealing is important for improving Sealing’s reliability and effectivity which result in zero leakage. Technology evolution of TRIZ can be used to forecast the future technology in products. These future technologies can guide a designer along the right direction of developing a new product. In this paper, the efficiency-reinforcement principle of hydrodynamic reciprocating Sealing is discussed, technology evolution of TRIZ is integrated with the efficiency reinforcement design of hydrodynamic reciprocating Sealing element to predict its future structure state. A new cross section shape of reciprocating Sealing element corresponding to the predicted structure state is presented. The computational model of the new reciprocating Seal element is established with ANSYS, and its stress, strain and pressure distribution are also analyzed. The results demonstrated that the presented Seal elemente outperforms the old O-Ring Seal in efficiency reinforcement capacity
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efficiency reinforcement design of hydraulic reciprocating Sealing element driven by triz technology evolution
Materials Science Forum, 2009Co-Authors: F. Y. Zhang, P. WangAbstract:The efficiency reinforcement technologies of Sealing is important for improving Sealing’s reliability and effectivity which result in zero leakage. Technology evolution of TRIZ can be used to forecast the future technology in products. These future technologies can guide a designer along the right direction of developing a new product. In this paper, the efficiency-reinforcement principle of hydrodynamic reciprocating Sealing is discussed, technology evolution of TRIZ is integrated with the efficiency reinforcement design of hydrodynamic reciprocating Sealing element to predict its future structure state. A new cross section shape of reciprocating Sealing element corresponding to the predicted structure state is presented. The computational model of the new reciprocating Seal element is established with ANSYS, and its stress, strain and pressure distribution are also analyzed. The results demonstrated that the presented Seal elemente outperforms the old O-Ring Seal in efficiency reinforcement capacity.
