A new high-pressure clearance seal with flexible laddered piston assembly in oil-free miniature compressor for potential hydrogen applications and investigation on its dynamic sealing efficiency

Deng, Yipan; Miao, Na; Wu, Defa; Liu, Yinshui; Zhai, Xiaomin; Tong, Jigang

doi:10.1016/j.ijhydene.2019.07.245

Cited by 12 publications

(5 citation statements)

References 29 publications

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“…Sliding velocity was chosen as 0.5 m/s and 1.0 m/s, respectively, to approach the practical instance in oil-free high-pressure compressor. 2 The corresponding wear track diameters were 5 mm and 10 mm, respectively. In addition, each test was repeated three times with a new set of specimens.…”

Section: Friction and Wear Testmentioning

confidence: 98%

“…With the combined effect of high pressure, the friction pair for dynamic sealing in the compressor can be easily damaged without oil-lubricating, as shown in Figure 1. 2 Therefore, it is of great significance to study the pairing material with excellent friction and wear properties at high temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Schematic diagram of friction pair for dynamically sealing in oil-free miniature high-pressure compressor. 2 …”

Section: Introductionmentioning

confidence: 99%

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Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiC_x/DLC film

Deng,

Liu,

Pang

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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Polytetrafluoroethylene (PTFE) has been widely used in industrial field for sealing parts. However, it is well known that PTFE is always subject to serious wear at high temperature (over 150 °C), which has become the main drawback limiting serve life of important equipment such as compressors. In this paper, a new solution is proposed for improving the wear resistance of carbon fibers-reinforced PTFE (CFRPTFE). Multilayer Ti-TiCx/DLC film is prepared and used as the counterface of CFRPTFE. Friction and wear tests at high temperature (200 °C and 250 °C) are carried out. The uncoated 17-4PH steel disks precisely polished by abrasive papers with different grain sizes are used as the reference counterface (SS80 and SS7000). It is found that by sliding against Ti-TiCx/DLC film, the tribological behaviors of CFRPTFE at high temperature can be improved. The friction coefficient between CFRPTFE and DLC under different test conditions can be kept in stable state. The wear rates of CFRPTFE reduce by 50%–70% compared to SS80, and reduction of 20%–40% can be observed when compared to SS7000. It can be found that graphitization transition at high temperature promotes the transfer layer formation and contributes to lower friction and lower wear compared to traditional processed counterface at high temperature. These significant improvements can prolong the lifetime of CFRPTFE moving parts used in high-temperature and heavy-load applications. Finally, engineering verification of the proposed friction pair is carried out in miniature oil-free high-pressure compressor.

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Section: Friction and Wear Testmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiC_x/DLC film

Deng,

Liu,

Pang

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

Self Cite

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“…Additionally, conditions of suction, discharge and control volume are represented by subscripts i, o and c respectively. d(Ec)/dθ represents the change rate of internal energy and it can be written as following when neglecting the variation of kinetic and potential energy 1 …”

Section: Mathematical Modellingmentioning

confidence: 99%

“…Miniature high pressure compressor (MHPC), which can compress gas to a high pressure (over 30 MPa), is key component of continuous gas supply system in aircraft. 1,2 Miniature oil-free high-pressure compressor with wobble-plate or swash-plate structure are attracting the attention of some researches and they current focus on the cooling efficiency of intercooler or the fatigue failure of core motion mechanism. [3][4][5] Compared with traditional high pressure compressor, the in-cylinder volume of miniature high pressure compressor are relatively smaller, especially for high-pressure stage.…”

Section: Introductionmentioning

confidence: 99%

Integrated reed valves applicable to miniature high pressure compressor and investigation on their dynamic characteristics based on equivalent model

Deng

Jiang

Liu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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Miniature high pressure compressor (MHPC) is key component of continuous gas supply system in aircraft for missile launching and infrared cooling. Valve design makes a crucial role in reciprocating compressors and traditional valves in high-pressure reciprocating compressors usually occupy a large space, have relative larger clearance volume and spring stiffness, which are incompetent to be applied to MHPC. In this study, integrated reed valves with four cantilevers on a steel plate are proposed to serve as the suction valves and discharge valves in MHPC. By this method, the number of valve parts and the axial dimension can be greatly reduced. Theoretical research has been carried out to reveal the dynamic characteristics of the proposed integrated valves. Numerical methods based on equivalent model of cantilever valve are proposed to improve the calculating efficiency compared to traditional CFD method. The equivalent stiffness and equivalent mass for valve motion equations have been calculated and plugged into the whole mathematical models. Based on the optimized valve parameters, experimental investigation on MHPC has been carried out.

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A comprehensive review of hydrogen-induced swelling in rubber composites

Zhou,

Liu,

Zheng

et al. 2024

Composites Part B: Engineering

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A new high-pressure clearance seal with flexible laddered piston assembly in oil-free miniature compressor for potential hydrogen applications and investigation on its dynamic sealing efficiency

Cited by 12 publications

References 29 publications

Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiC_x/DLC film

Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiC_x/DLC film

Integrated reed valves applicable to miniature high pressure compressor and investigation on their dynamic characteristics based on equivalent model

A comprehensive review of hydrogen-induced swelling in rubber composites

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A new high-pressure clearance seal with flexible laddered piston assembly in oil-free miniature compressor for potential hydrogen applications and investigation on its dynamic sealing efficiency

Cited by 12 publications

References 29 publications

Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiCx/DLC film

Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiCx/DLC film

Integrated reed valves applicable to miniature high pressure compressor and investigation on their dynamic characteristics based on equivalent model

A comprehensive review of hydrogen-induced swelling in rubber composites

Contact Info

Product

Resources

About

Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiC_x/DLC film

Improving the tribological performance of CFRPTFE at elevated temperature by sliding against Ti-TiC_x/DLC film