scholarly journals Structural Design and Sealing Performance Analysis of Biomimetic Sealing Ring

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Chuanjun Han ◽  
Han Zhang ◽  
Jie Zhang
Keyword(s):  
Friction Coefficient ◽  
Contact Stress ◽  
Von Mises Stress ◽  
Stress Increase ◽  
Medium Pressure ◽  
Sealing Performance ◽  
Sealing Ring ◽  
Hardness Increase ◽  
Dynamic Seal ◽  
Von Mises

In order to reduce the failure probability of rubber sealing rings in reciprocating dynamic seal, a new structure of sealing ring based on bionics was designed. The biomimetic ring has three concave ridges and convex bulges on each side which are very similar to earthworms. Bulges were circularly designed and sealing performances of the biomimetic ring in both static seal and dynamic seal were simulated by FEM. In addition, effects of precompression, medium pressure, speed, friction coefficient, and material parameters on sealing performances were discussed. The results show that von Mises stress of the biomimetic sealing ring distributed symmetrically in no-pressure static sealing. The maximum von Mises stress appears on the second bulge of the inner side. High contact stress concentrates on left bulges. Von Mises stress distribution becomes uneven under medium pressure. Both von Mises stress and contact stress increase when precompression, medium pressure, and rubber hardness increase in static sealing. Biomimetic ring can avoid rolling and distortion in reciprocating dynamic seal, and its working life is much longer than O-ring and rectangular ring. The maximum von Mises stress and contact stress increase with the precompression, medium pressure, rubber hardness, and friction coefficient in reciprocating dynamic seal.

scholarly journals Design and seal performance analysis of bionic sealing ring for dynamic seal

Mechanika ◽  
2020 ◽  
Vol 26 (4) ◽  
pp. 338-345
Author(s):  
Yang HU ◽  
Jie ZHANG ◽  
Li Ming CHEN
Keyword(s):  
Friction Coefficient ◽  
Smooth Surface ◽  
Fluid Pressure ◽  
Rotating Machinery ◽  
Two Dimensional ◽  
Hydraulic Systems ◽  
Sealing Performance ◽  
Sealing Ring ◽  
Dynamic Seal ◽  
Better Than

In this paper, the non-smooth surface technology is applied to the surface structure of the rectangular sealing ring, and a bionic sealing ring is designed. Two-dimensional axisymmetric models of rectangular and bionic sealing rings were established. Effects of pre-compression amount, fluid pressure, friction coefficient and reciprocating velocity on the static and dynamic sealing performance of two sealing rings were studied. The results show that the seal performance of the bionic sealing ring is greater than that of rectangular. The static seal performance increases with the increasing of fluid pressure and compression amount. Dynamic sealing performance in outward stroke is better than it in the inward stroke. Friction coefficient has a smaller effect on the bionic sealing ring’s sealing performance than rectangular sealing ring. Therefore, using the bionic sealing ring can improve the static and dynamic seal performances and prolong its service life in hydraulic systems, rotating machinery and reciprocating machinery.

Finite Element Analysis and Simulation of the Sealing Performance of Y-Ring Rubber Seal

2013 ◽  
Vol 444-445 ◽  
pp. 1379-1383 ◽  
Author(s):  
Kai Bo Cui ◽  
Jun Qi Qin ◽  
Chang Chun Di ◽  
Yan Feng Yang
Keyword(s):  
Finite Element ◽  
Contact Pressure ◽  
Von Mises Stress ◽  
Hydraulic Pressure ◽  
Element Analysis ◽  
Rubber Seal ◽  
Seal Failure ◽  
Sealing Performance ◽  
Sealing Ring ◽  
Von Mises

Application of super elasticity theory and nonlinear theory, based on finite element method and the Abaqus software, the performance of Y ring rubber seal, such as the Von Mises stress, the sealing ring deformation and the contact pressure were simulated and analyzed under the influence of changeable hydraulic pressure. According to seal failure criterion, the effect of hydraulic pressure changes on the sealing performance were studied. Results show that, the maximum stress appears in the intersection of lips, the largest deformation area near the inner lip. The root has greater contact pressure, which would result in bitten phenomenon or aggravate wear.

Contact Stress Analysis of Packer Rubber Based on ANSYS Software

2013 ◽  
Vol 860-863 ◽  
pp. 2966-2969
Author(s):  
Teng Li ◽  
Le Mu ◽  
Xian Da Wang ◽  
Bo Feng ◽  
Zi Yi Jin
Keyword(s):  
Stress Analysis ◽  
Axial Compression ◽  
Contact Stress ◽  
Mechanical Model ◽  
Frictional Coefficient ◽  
Von Mises Stress ◽  
Ansys Software ◽  
Stress Increase ◽  
Hyper Elastic ◽  
Von Mises

In this paper three-rubber compression packers are regard as study objects, hyper-elastic constitution equation Yeoh has been used, the ANSYS mechanical model of packer rubber has been established by ANSYS software, the influence of axial setting force and frictional coefficient on the contact stress of packer rubber has been analyzed. The research results indicate that with the increasing of setting force, the axial compression amount and Von Mises stress increase; with the increasing of frictional coefficient between rubber and casing, the Von Mises stress of the intermediate rubber decreases slowly.

Nonlinear Analysis of Rotary Sealing Performance of Rubber O-Ring

2013 ◽  
Vol 470 ◽  
pp. 371-375 ◽  
Author(s):  
Shao Hua Chen ◽  
Guo Zhang Jiang ◽  
Gong Fa Li ◽  
Liang Xi Xie ◽  
Wen Qiang Qian
Keyword(s):  
Contact Stress ◽  
Element Model ◽  
Rotating Shaft ◽  
Medium Pressure ◽  
Maximum Contact Stress ◽  
Sealing Performance ◽  
Two Factors ◽  
Ring Seal ◽  
Von Mises ◽  
Maximum Contact

The two-dimensional O-ring seal nonlinear axisymmetric finite element model are established which is used for swinging hydraulic cylinder. Some factors influencing rubber O-ring sealing performance were taken into account, such as rotating shaft diameter, O-ring seal section diameter. The results indicate that when medium pressure is zero, the two factors influence Von Mises and maximum contact stress of sealing face greatly. Under medium pressure (P=10Mpa), the two factors have a little influence to Von Mises and maximum contact stress.

Design and Analysis on a Kind of Oblique-Cone-Slid-Ring Assembly Seal Device with Self-Compensation to Seal Wear in Carbide Actor

2010 ◽  
Vol 43 ◽  
pp. 247-252 ◽  
Author(s):  
Yong Hu ◽  
Wei Yan ◽  
Hua Bing Wen ◽  
Chuan Shun Wen
Keyword(s):  
Work Stress ◽  
Contact Stress ◽  
Von Mises Stress ◽  
Thickness Variation ◽  
Ansys Software ◽  
Ring Assembly ◽  
Spring Force ◽  
User Demand ◽  
Von Mises ◽  
Oblique Cone

We design and analyze a kind of oblique-cone-slid-ring (OCSR) assembly seal device used in carbide actor that can self-compensate the seal wear. The effect of the OCSR thickness variation on the contact stress, Von mises stress, and spring force is analyzed using ANSYS software. It shows that the OCSR assembly seal device can seal well and has the function of self-compensation to seal wear when the OCSR thickness vary during the experiment conditions given. The max contact stress on the seal surface and other contact face is higher or much higher than the work stress of sealed medium. That means the design is satisfied with the user demand. The results provide a theoretical base for the further study and applications of the OCSR assembly seal device.

Experimental Study and Finite Element Analysis of the Performance of Reciprocating Seal in Rapping Device of Gasifier

2010 ◽  
Vol 42 ◽  
pp. 48-53
Author(s):  
Jiu Yang Yu ◽  
Jiu Yang Gao ◽  
Wei Lin ◽  
Cheng Gang Wang ◽  
Yan Yang Wu ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Experimental Study ◽  
Finite Element ◽  
Contact Stress ◽  
Power Loss ◽  
Von Mises Stress ◽  
Seal Ring ◽  
Element Analysis ◽  
Von Mises

The performance of reciprocating seals in rapping device of gasifier was studied through finite element method. The contact stress, Von-Mises stress, and friction power loss of O-ring and Sliding-ring combined Seal-ring were obtained. Meanwhile, the experimental study in performance of seal structures of rapping device were carried out. The results show that both of the seal structures are satisfied seal requirement, but compared with the Sliding-ring combined Seal-ring, the O-ring is easier to be destroyed and power loss of O-ring is higher than Sliding-ring combined Seal-ring. The results also verify the superiority of Sliding-ring combined Seal-ring in rapping device of gasifier.

scholarly journals Research on Key Factors of Sealing Performance of Combined Sealing Ring

2022 ◽  
Vol 12 (2) ◽  
pp. 714
Author(s):  
Heming Cheng ◽  
Xinyuan Chen ◽  
Xiaolan Chen ◽  
Hucheng Liu
Keyword(s):  
Contact Force ◽  
Working Conditions ◽  
Contact Stress ◽  
Compression Ratio ◽  
Cylinder Wall ◽  
Seal Ring ◽  
Key Factors ◽  
Working Pressure ◽  
Sealing Performance ◽  
Sealing Ring

In this study, the mechanical properties of a combined seal ring under different loads were numerically calculated using ANSYS. The effect of the working pressure and pre-compression ratio of a rubber O-ring on the contact stress of the combined seal ring was studied. The influence of the wear ring’s chamfer, thickness, and width on the contact stress and contact force of the combined seal ring was analyzed. Studies have shown that it is particularly important to select a compression ratio that is suitable for the working conditions. Under the same conditions of working pressure and compression ratio, upon increasing the wear ring chamfer, the contact pressure is decreased due to the decreasing contact bandwidth between the wear ring and the cylinder wall. This has little effect on the contact stress of the combined seal ring as well as the contact force, while the width of the wear ring is proportional to the latter.

The effect of proximity of a rail end in elastic-plastic contact between a wheel and a rail

2003 ◽  
Vol 217 (3) ◽  
pp. 189-201 ◽  
Author(s):  
Y. C. Chen
Keyword(s):  
Contact Stress ◽  
Contact Point ◽  
Plastic Zone Size ◽  
Von Mises Stress ◽  
Stress Distributions ◽  
Elastic Plastic ◽  
Contact Points ◽  
Contact Distance ◽  
Von Mises ◽  
Strain Model

This paper investigates the effects of a free rail end on the contact stress distribution near the rail end by employing elastic-plastic finite element methods. The contact elements were used to simulate the interaction between a wheel and a rail. A plane strain model was used in this study. Variations in contact stress fields at various contact points near the rail end were compared. The availability of the Hertz contact theory in the region near the rail end was also investigated. The numerical results indicated that the contact stress distributions around the rail end are sensitive to the contact distance. The location of the maximum von Mises stress was shifted to the contact surface as the contact point moves close to the rail end. Results also show that the plastic zone size and the von Mises stress are increased gradually and extend to the rail end as the contact point moves near the rail end. A higher stress, larger deflection and serious plastic deformation occurring at the rail end may lead to deterioration and delamination at the rail end.

Sealing Performance Analysis of Cap Seal Rings in the Stirling Engine Piston Rod

2014 ◽  
Vol 697 ◽  
pp. 206-209
Author(s):  
Jun Chang
Keyword(s):  
High Speed ◽  
Friction And Wear ◽  
Stirling Engine ◽  
Reciprocating Motion ◽  
Working Environments ◽  
Engine Piston ◽  
Sealing Performance ◽  
Working Medium ◽  
Sealing Ring ◽  
Dynamic Seal

When the Stirling engine piston rod for reciprocating motion at a high speed under dry friction conditions, the temperature fall or pressure drop is mainly caused by uneven sealing ring deformation, increased wear and sealing performance fall. This article is introduced a cap seal rings of Stirling engine piston, study for friction and wear in theory under dynamic seal condition, and establish a rod seal test equipment to analysis the cap seal structure distortion and gauge wear in different working environments by experimental methods. Finally, come to the conclusion that when working medium pressure at 7 mpa, the cap seal performance is best.Keywords: Rod seal; cap seal structure; stress analysis

scholarly journals Biomechanical Effect of UHMWPE and CFR-PEEK Insert on Tibial Component in Unicompartmental Knee Replacement in Different Varus and Valgus Alignments

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3345
Author(s):  
Yong-Gon Koh ◽  
Hyoung-Taek Hong ◽  
Kyoung-Tak Kang
Keyword(s):  
Knee Replacement ◽  
Contact Stress ◽  
Tibial Component ◽  
Element Model ◽  
Von Mises Stress ◽  
Unicompartmental Knee Replacement ◽  
Neutral Position ◽  
Unicompartmental Knee ◽  
Von Mises ◽  
Valgus Alignment

The current study aims to analyze the biomechanical effects of ultra-high molecular weight polyethylene (UHMWPE) and carbon-fiber-reinforced polyetheretherketone (CFR-PEEK) inserts, in varus/valgus alignment, for a tibial component, from 9° varus to 9° valgus, in unicompartmental knee replacement (UKR). The effects on bone stress, collateral ligament force, and contact stress on other compartments were evaluated under gait cycle conditions, by using a validated finite element model. In the UHMWPE model, the von Mises’ stress on the cortical bone region significantly increased as the tibial tray was in valgus >6°, which might increase the risk of residual pain, and when in valgus >3° for CFR-PEEK. The contact stress on other UHMWPE compartments decreased in valgus and increased in varus, as compared to the neutral position. In CFR-PEEK, it increased in valgus and decreased in varus. The forces on medial collateral ligaments increased in valgus, when compared to the neutral position in UHMWPE and CFR-PEEK. The results indicate that UKR with UHMWPE showed positive biomechanical outputs under neutral and 3° varus conditions. UKR with CFR-PEEK showed positive biomechanical outputs for up to 6° varus alignments. The valgus alignment should be avoided.

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