Empirical research on the friction behavior of O-rings in hydraulic cylinders

Qin, Zhen; Wu, Yu-Ting; He, Lei; Gao, Xiang; Lyu, Sung-Ki

doi:10.1371/journal.pone.0280815

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…This may be due to the different hardness of different rubber materials, resulting in different deformations of the rubber O-ring. The greater the hardness, the greater the friction force, the more the friction force increases, and the more obvious the time effect of the O-ring's friction [10].…”

Section: Discussionmentioning

confidence: 99%

“…A rubber O-ring is a basic part of mechanical seals and magnetic valves, which have been widely applied in many fields, such as petrochemical, nuclear power, and aeronautic equipment [1][2][3][4]. As a common auxiliary sealing element, friction between the rubber O-ring and the corresponding part might affect efficiency, reliability, stick-slip phenomenon, and sealing surface wear in the relative sliding motion [5][6][7][8][9][10]. When a rubber O-ring frequently moves or remains in place for a long time, the friction force on the rubber O-ring might change.…”

Section: Introductionmentioning

confidence: 99%

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An Experiment on the Dwell Time Effect of Rubber Seal O-Rings: Friction Force in Intermittent Reciprocating Motion

Bai,

Wang,

Yang

2024

Materials

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The adhesive force between two contact surfaces often leads to an increase in the friction force of the rubber seal O-ring after a certain dwell time, forming dwell time effects and affecting the reliability of sealing. The dwell time effect may result in substantial instability with respect to the frictional behavior of rubber O-rings, which needs to be carefully taken into account in the design of rubber seals. Therefore, in this paper, the dwell time effect of the friction force was studied experimentally for intermittent reciprocating rubber seal O-rings coupled with stainless steel 316L and a sealing air medium. The friction force of three kinds of rubber materials, including fluorine rubber (FPM), silicone rubber (SI), and nitrile rubber (NBR), was measured under different dwell times, compression ratios, and seal pressure. The results showed that there was a rolling frictional force, and the second peak value of the frictional force caused by the O-ring's rolling under shear action and after the maximum static frictional force was observed at the starting stage of reciprocating motion. For FPM O-rings, the rolling friction force was much greater than the maximum static frictional force at about four times the value of the compression ratio at 9% and seal pressure at 0; moreover, the force was much greater at greater compression ratios. The dwell time effect was significant in the friction forces of rubber O-rings. The friction force increases with an increase in dwell time. The increase in maximum static friction force exceeded 50% after 5 dwell days. The increase in seal pressure led to the disappearance of the rolling friction feature and the rapid increase in friction during the starting stage. Under gas seal pressure conditions, the dwell time effect still led to a significant increase in friction force. The obtained results might provide guidance for the material selection of sealing designs.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Experiment on the Dwell Time Effect of Rubber Seal O-Rings: Friction Force in Intermittent Reciprocating Motion

Bai,

Wang,

Yang

2024

Materials

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Psycho Acoustic Testing to Determine the Optimal Frequency for Audible Safety Alerts for Freediving

Nanda,

Zoraiz,

Barua

et al. 2024

2024 Systems and Information Engineering Design Symposium (SIEDS)

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AI-driven optimization of dynamic vibration absorbers with hydraulic amplifier and mechanical inerter integration

Shamseldin,

Abido,

Alofi

2024

Front. Mech. Eng.

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Dynamic vibration absorbers (DVAs) have been widely employed in vibration suppression applications for decades. While DVAs offer an effective solution, they are limited by the need for a high mass ratio between the DVA and the primary system to achieve significant vibration attenuation. To overcome this, researchers have introduced lever mechanisms, allowing for enhanced vibration suppression without increasing the mass ratio. However, levers, commonly used as amplification mechanisms, suffer from high inertia and limited amplification, particularly in larger applications. Another limitation is when DVAs are employed for energy harvesting as a secondary objective, they exhibit high sensitivity to system parameter variations, requiring extensive optimization. Various optimization techniques have been applied to DVAs for multi-objective optimization, including fixed-point theory, which is complex and requires intensive mathematical derivation, and simple metaheuristic techniques such as genetic algorithms (GA). This study proposes four novel DVAs using a hydraulic amplifier (HA) to address the limitations of traditional lever mechanisms and a mechanical inerter to improve the vibration damping. Also, multi-objective optimization was performed using particle swarm optimization (PSO) which is considered innovative in this application and compared with commonly used genetic algorithms (GA). The governing equations were derived using Newton’s second law and solved numerically with the Runge-Kutta method. An AI-based approach was utilized for HA design. The results show that integrating HA and mechanical inerters significantly enhances vibration attenuation and broadens the frequency response. Additionally, the location of the mechanical inerter is critical in reducing vibration amplitude. Also, the multi-objective PSO outperforms GA in solution diversity and quality. The proposed integration of HA in DVAs offers potential applications across various engineering fields.

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Empirical research on the friction behavior of O-rings in hydraulic cylinders

Cited by 3 publications

References 31 publications

An Experiment on the Dwell Time Effect of Rubber Seal O-Rings: Friction Force in Intermittent Reciprocating Motion

An Experiment on the Dwell Time Effect of Rubber Seal O-Rings: Friction Force in Intermittent Reciprocating Motion

Psycho Acoustic Testing to Determine the Optimal Frequency for Audible Safety Alerts for Freediving

AI-driven optimization of dynamic vibration absorbers with hydraulic amplifier and mechanical inerter integration

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