Seat tightness of pneumatic cryogenic control valve

Zhang, Ning; Li, Qiang; Li, Qing; Hu, Zhongjun; Hu, Kang

doi:10.1007/s11431-013-5272-8

Cited by 6 publications

(9 citation statements)

References 9 publications

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“…The dynamic characteristic main component of this cryogenic pneumatic valve based on PCA is represent as: The contribution rate distribution of main component of this cryogenic pneumatic valve is expressed as Figure 2. Based on Figure 3, spring rigidity 1 X is the maximum contribution rate in all main components in this cryogenic pneumatic valve. 1 X is key influencing factor.…”

Section: Applicationmentioning

confidence: 99%

“…Based on Figure 3, spring rigidity 1 X is the maximum contribution rate in all main components in this cryogenic pneumatic valve. 1 X is key influencing factor. The opening time is shorter and valve spool movement is faster when spring rigidity 1 X is smaller in a regular spring pre-compress value.…”

Section: Applicationmentioning

confidence: 99%

“…As result, the phase step responding, the responding time is approximate to the true measurement of responding time in this cryogenic pneumatic valve. Based on dynamic characteristic model of this cryogenic pneumatic valve, the main influencing factors include spring rigidity 1 X , operation gas pressure 2 X , medium pressure 3 X , spring pre-compress length 4 X , gas cylinder volume 5 X , friction force 6 X . The dynamic characteristic main component of this cryogenic pneumatic valve based on PCA is represent as: The contribution rate distribution of main component of this cryogenic pneumatic valve is expressed as Figure 2.…”

Section: Applicationmentioning

confidence: 99%

“…The normal operation and shutdown of liquid oxygen/kerosene rocket engine was decided by reasonable starting, transferring working condition, and shutdown time order control., so that the dynamic characteristics of cryogenic pneumatic valve is a key of propellant supply [1]. But dynamic characteristics of cryogenic pneumatic valve are influenced by many factors, such as temperature, flow, structure, environment, and so on, and these factors are associated and restriction.…”

Section: Introductionmentioning

confidence: 99%

“…There were some researches of dynamic responding characteristic analyzing aspects of cryogenic valve [4][5][6]. However, few studies have been devoted to dynamic responding characteristic quantitative analysis of cryogenic pneumatic valve.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The Dynamic Characteristic Research Method of Cryogenic Pneumatic Valve Based on Principal Component Analysis

Qin¹,

Li²,

Li³

et al. 2015

Advances in Computer Science Research

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Abstract. To conduct quantitative analysis on the dynamic characteristics of cryogenic pneumatic valve to satisfy reliability demand, the time characteristics of cryogenic pneumatic valve were analyzed by means of the operation principle of cryogenic pneumatic valve, and dynamic characteristics model of cryogenic pneumatic valve was established by velocity dynamics theory. Based on this analysis, the key influencing factor can be defined and nonlinear quantitative analysis between dynamic characteristics and influencing factors can be completed of cryogenic pneumatic valve by principal component analysis (PCA). Finally, effectiveness of the proposed method was verified by a case study. It has shown the proposed method can improve response time and reliability of cryogenic pneumatic valve, and can provide a support for performance evaluation to rocket engine.

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Section: Applicationmentioning

confidence: 99%

Section: Applicationmentioning

confidence: 99%

Section: Applicationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Dynamic Characteristic Research Method of Cryogenic Pneumatic Valve Based on Principal Component Analysis

Qin¹,

Li²,

Li³

et al. 2015

Advances in Computer Science Research

View full text Add to dashboard Cite

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Mechanical properties and microstructure of polychlorotrifluoroethylene toughened by polyamide 11 based on intermolecular interaction

Wen

et al. 2022

J of Applied Polymer Sci

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Polychlorotrifluoroethylene (PCTFE) is a promising candidate for cryogenic storage and transportation materials in clean energy industry. But, how to improve its toughness without scarification other performance is still challenging. In this study, the immiscible PA11 is introduced into PCTFE matrix as toughening agent based on a strategy of enhanced interfacial effect. As the incorporation of PA11 increased from 0 to 20 wt%, the toughness of the PCTFE/PA11 shows a trend of first increasing and then decreasing, which reaches the optimal performance with 5 wt% PA11. The elongation at break and impact strength are respectively increased by ~3 and ~1.9 times without obvious reduction of other mechanical performance. Meanwhile, PA11 could enhance the primary nucleation and crystallization ability of PCTFE. With further detailed information of microstructures and Fourier infrared spectra, a multieffect synergistic toughening mechanism based on rigid particle and intermolecular interaction has been elucidated. Furthermore, the toughening of PA11 on PCTFE at ultra‐low temperature of −196°C is confirmed.

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Multi-objective optimization design of double resilient groove metal seat for ball valve in liquid hydrogen receiving stations

Li,

Zheng,

Wang

et al. 2023

J Braz. Soc. Mech. Sci. Eng.

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For the liquid hydrogen receiving station ball valve seat in ultra-low temperature working conditions the cold shrinkage deformation is easy to lead to valve seal failure. Design a dual-elastic groove metal valve seat and a preliminary assessment of its performance. the seat performance is optimized based on the RBF approximation model combined with the NSGA-II algorithm. Use the Spearman method to analyze the sensitivity analysis and determine the optimized design variable. Based on the maximum equivalent stress Smax, maximum deformation Dmax, minimum fatigue life Lmin, and mass M as the optimized goal, the optimal Latin superposition method samples the valve seat structure parameters, and the establishment of High-precision RBF proxy model combined with the NSGA-Ⅱ algorithm to find excellent PARETO cutting-edge solutions, comprehensively considering the performance requirements of valve seats to determine the optimal structural parameters of the valve seat. The maximum stress of the valve seat after the optimization decreased by 43.45%, the maximum deformation decreased by 45.33%, the quality was reduced by 22.49%, and the life expectancy increased by 114.11%. The finite element analysis of the seal verifies that the optimized seat has an excellent compensation effect under the ultra-low temperature conditions of liquid hydrogen.

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Seat tightness of pneumatic cryogenic control valve

Cited by 6 publications

References 9 publications

The Dynamic Characteristic Research Method of Cryogenic Pneumatic Valve Based on Principal Component Analysis

The Dynamic Characteristic Research Method of Cryogenic Pneumatic Valve Based on Principal Component Analysis

Mechanical properties and microstructure of polychlorotrifluoroethylene toughened by polyamide 11 based on intermolecular interaction

Multi-objective optimization design of double resilient groove metal seat for ball valve in liquid hydrogen receiving stations

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