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Numerical study on sealing characteristic of rubber X-ring exposed to high-pressure hydrogen by considering swelling effect

Published on Jan 14, 2019in Industrial Lubrication and Tribology1.037
· DOI :10.1108/ILT-02-2018-0067
Chilou Zhou1
Estimated H-index: 1
(SCUT: South China University of Technology),
Mohan He1
Estimated H-index: 1
(SCUT: South China University of Technology)
+ 1 AuthorsSaihua Jiang1
Estimated H-index: 1
(SCUT: South China University of Technology)
Abstract
Purpose This paper aims to investigate the sealing characteristic of the rubber X-ring combined seal used in high-pressure hydrogen service and clarify the effect of swelling due to dissolved hydrogen on the sealing behavior. Design/methodology/approach A finite element analysis method with a user subroutine is proposed to investigate the sealing characteristic of rubber X-ring seals in conjunction with the swelling effect. Findings The swelling has a noticeable impact on the sealing behavior. The higher peak contact stress suggests that the X-ring seal may be superior to the O-ring seal, while the calculated increase in Mises stress suggests the X-ring exhibits a higher propensity to mechanical damage under low pressure conditions. Originality/value This paper describes a method with a user subroutine developed within ABAQUS to simulate the sealing performance coupled hydrogen swelling. The suitability of X-ring seals is evaluated. This work provides insight into the swelling effect on sealing behavior of an X-ring, which is of great value for the design and application of rubber seals used in hydrogen service.
  • References (12)
  • Citations (1)
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References12
Newest
#1Jie Zhang (SWPU: Southwest Petroleum University)H-Index: 1
#2Jingxuan Xie (SWPU: Southwest Petroleum University)H-Index: 1
13 CitationsSource
#1Chilou Zhou (SCUT: South China University of Technology)H-Index: 1
#2Guohua Chen (SCUT: South China University of Technology)H-Index: 1
Last. Pengfei Liu (ZJU: Zhejiang University)H-Index: 1
view all 3 authors...
Sealing structures of high-pressure hydrogen storage vessel are always considered as one of the significant components. This paper aims to study the sealing performance of the combined sealing structure composed of a rubber D-ring and a wedge-ring used in high-pressure hydrogen storage vessel by elucidating the swelling mechanisms due to dissolved hydrogen. Comparisons of the sealing performance between the D-ring and the O-ring are made in terms of the effects of some important factors includin...
2 CitationsSource
#1Dong-Chul ShinH-Index: 4
#2Jai-Sug Hawong (Yeungnam University)H-Index: 8
Last. Hyun-Seok Lim (Yeungnam University)H-Index: 2
view all 5 authors...
X-rings were introduced as a result of the limitations of O-rings that twist, especially during dynamic applications. The X-ring design avoids twisting, and the presence of a groove between the lobes acts as a lubricant reservoir that improves the packing life of these seals. Because of the multiple seal points, less squeeze rate is required to provide an effective seal. In addition, friction and wear is decreased, which increases seal life and decreases maintenance costs. Therefore, a better un...
8 CitationsSource
#1Alunda Ouma Bernard (Dedan Kimathi University of Technology)H-Index: 2
#2Jai-Sug Hawong (Yeungnam University)H-Index: 8
Last. Hyun-Seok Lim (Yeungnam University)H-Index: 2
view all 4 authors...
Sealing elements are essential parts of many machines, and are used to prevent the loss of a fluid or gas. When such fluids are not properly sealed, catastrophic failures may result. Many different types of rings have been developed to suit various industrial needs. Considerable research has been done on the O-ring. We analyze the internal stresses developed in an X-ring under a uniform squeeze rate of 20%, which is suitable for static applications, using a photoelastic experimental hybrid metho...
2 CitationsSource
#1Sylvie Castagnet (University of Poitiers)H-Index: 11
#2Jean-Claude Grandidier (University of Poitiers)H-Index: 13
Last. Guillaume Benoit (University of Poitiers)H-Index: 7
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The paper aims at characterizing some key features of the mechanical behavior of two semi-crystalline polymers in weakly pressurized hydrogen. The opportunity to use hydrogen as an alternative energy strengthens the need for reliable data on possible coupling effects between gas diffusion and mechanical properties, especially for safe design purpose. However, such effects have not been really quantified in polymers. In the present study, a hydraulic testing machine has been fitted with a pressur...
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#1Jinyang Zheng (ZJU: Zhejiang University)H-Index: 21
#2Xianxin Liu (ZJU: Zhejiang University)H-Index: 5
Last. Jian Yang (ZJU: Zhejiang University)H-Index: 12
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Abstract Economic, efficient and safe hydrogen storage is the key to hydrogen economy. High pressure gaseous hydrogen storage offers the simplest solution in terms of infrastructure requirements and has become the most popular and highly developed method. There are three types of high pressure gaseous hydrogen storage vessel, namely: stationary, vehicular, and bulk transportation. First, recent progress toward low-cost, large capacity and light-weight on high pressure gaseous hydrogen storage ve...
165 CitationsSource
#1Junichiro Yamabe (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 16
#2Hirotada Fujiwara (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 8
Last. Shin Nishimura (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 10
view all 3 authors...
In order to clarify the influence of high pressure hydrogen gas on mechanical damage in a rubber O-ring, the fracture analysis of the O-ring used for a sealing material of a pressure hydrogen vessel was conducted. The O-ring was exposed twenty cycles to hydrogen gas at 100 MPa. All the cracks observed in this study emanated from the interior, which can be classified into two types, type 1 and type 2, from the viewpoint of the location of crack initiation and the direction of crack growth. The ty...
10 CitationsSource
#1Hyung-Kyu KimH-Index: 11
#2Jeong-Hwan NamH-Index: 6
Last. Young-Ho LeeH-Index: 17
view all 4 authors...
Abstract Contact and internal stresses of an elastomeric O-ring which is subjected to a vertical compression and lateral pressure at one side are evaluated experimentally and theoretically for a failure analysis and a life prediction. In the experiment, the O-ring specimen was made of epoxy resin. The applied fractional compression was 20% and the lateral pressure was varied as 1.96, 2.94 and 3.92 MPa. The photoelastic experimental hybrid method was used to obtain both the contact and internal s...
12 CitationsSource
#1Junichiro Yamabe (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 16
#2Shin Nishimura (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 10
Abstract Ethylene–propylene rubber (EPDM) and nitrile–butadiene rubber (NBR) composites having carbon black, silica, and no fillers were exposed to hydrogen gas at a maximum pressure of 10 MPa; then, blister tests and the measurement of hydrogen content were conducted. The hydrogen contents of the composites were proportional to the hydrogen pressure, i.e., the behavior of their hydrogen contents follows Henry's law. This implies that hydrogen penetrates into the composite as a hydrogen molecule...
69 CitationsSource
#1Hyungjoo Lee (CNU: Chungnam National University)H-Index: 5
#2Y. S. LeeH-Index: 2
Last. J.-H. Baek (CNU: Chungnam National University)H-Index: 1
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A X-ring is a loop of elastomer with X-shaped cross-section used as a mechanical seal or gasket. Such a X-ring is designed to be seated in a groove and is compressed during assembly between two or more parts, creating a seal at the interface. The seal is designed to have line contact between the X-ring and sealing faces. This allows a high local stress, able to contain high pressure, without exceeding the yield stress of the X-ring shell body. This study aims to detect the contact stress and the...
10 CitationsSource
Cited By1
Newest
Last. Sheng Sun
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In this paper, the X-ring for hydraulic actuators of a certain aircraft was analyzed in order to reinforce the sealing performance of hydraulic actuators, prolong the life of the sealing ring and prolong the service life of the sealing ring. The contact stress and equivalent stress under different compression are simulated by ABAQUS. The location where X-ring is prone to tear failure is found out. According to the contact stress, the wear life of X-ring is analyzed. Areas prone to wear have been...
Source
#1Chilou Zhou (SCUT: South China University of Technology)H-Index: 1
#2Guohua Chen (SCUT: South China University of Technology)
Last. Chaohua Gu (ZJU: Zhejiang University)H-Index: 5
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Abstract Fretting is a low-amplitude reciprocating movement which may lead to seal failure, it is important to explore the fretting characteristic of a rubber seal in hydrogen atmosphere. In this work, a numerical model considering the effect of hydrogen swelling was presented to study the fretting behavior of a rubber seal. The fretting running condition was analyzed. Results showed that, the amplitude of reciprocating motion made a great effect on the fretting state of rubber seals, the O-ring...
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