Experimental investigations on the effect of rod surface roughness on lubrication characteristics of a hydraulic O-ring seal

Wang, Bingqing; Meng, Xiangkai; Peng, Xudong; Chen, Yuan

doi:10.1016/j.triboint.2020.106791

Cited by 19 publications

(13 citation statements)

References 21 publications

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“…The research described in [ 57 , 58 ] showed that tribological issues and tightness of the system are influenced by the roughness of cooperating surfaces.…”

Section: Failures Of Hydraulic Actuatorsmentioning

confidence: 99%

“…Another material used for seals is NBR (nitrile butadiene rubber) [ 9 , 10 , 11 , 54 , 58 , 59 ] and HNBR (hydrogenated nitrile butadiene rubber) [ 10 ].…”

Section: Materials and Surface Modifications Used For Hydraulic Acmentioning

confidence: 99%

“…In [ 54 ], NBR is used for the main piston sealing element and Glyd sealing of the piston. The papers [ 58 , 59 ] describe the testing of O-rings made of this material. In [ 9 ], NBR was described for use on the piston rod wipers.…”

Section: Materials and Surface Modifications Used For Hydraulic Acmentioning

confidence: 99%

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Overview of Materials Used for the Basic Elements of Hydraulic Actuators and Sealing Systems and Their Surfaces Modification Methods

2021

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The article is an overview of various materials used in power hydraulics for basic hydraulic actuators components such as cylinders, cylinder caps, pistons, piston rods, glands, and sealing systems. The aim of this review is to systematize the state of the art in the field of materials and surface modification methods used in the production of actuators. The paper discusses the requirements for the elements of actuators and analyzes the existing literature in terms of appearing failures and damages. The most frequently applied materials used in power hydraulics are described, and various surface modifications of the discussed elements, which are aimed at improving the operating parameters of actuators, are presented. The most frequently used materials for actuators elements are iron alloys. However, due to rising ecological requirements, there is a tendency to looking for modern replacements to obtain the same or even better mechanical or tribological parameters. Sealing systems are manufactured mainly from thermoplastic or elastomeric polymers, which are characterized by low friction and ensure the best possible interaction of seals with the cooperating element. In the field of surface modification, among others, the issue of chromium plating of piston rods has been discussed, which, due, to the toxicity of hexavalent chromium, should be replaced by other methods of improving surface properties.

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“…The research described in [ 57 , 58 ] showed that tribological issues and tightness of the system are influenced by the roughness of cooperating surfaces.…”

Section: Failures Of Hydraulic Actuatorsmentioning

confidence: 99%

“…Another material used for seals is NBR (nitrile butadiene rubber) [ 9 , 10 , 11 , 54 , 58 , 59 ] and HNBR (hydrogenated nitrile butadiene rubber) [ 10 ].…”

Section: Materials and Surface Modifications Used For Hydraulic Acmentioning

confidence: 99%

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Overview of Materials Used for the Basic Elements of Hydraulic Actuators and Sealing Systems and Their Surfaces Modification Methods

2021

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“…According to the sealing principle, the stop valve could reach a good sealing performance only when the deformation generated by the sealing force offsets the initial roundness error of the sealing region. 25,26 The validated finite element analysis (FEA) is used to obtain the quantitative relationship between the environmental pressure and sealing performance, and then a quantitative evaluation method is proposed.…”

Section: Introductionmentioning

confidence: 99%

Research on the sealing performance of a seawater stop valve considering roundness error used in an 11000-m manned submersible

Wang

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The sealing performance is a critical characteristic of the stop valve used in an 11000-m manned submersible, while it is a challenge when the pressure difference at the valve port reaches 120 MPa. Previous studies have mainly focused on the effect of surface microtopography, such as the surface roughness, on sealing performance. They believed that rougher surfaces will result in more severe leaks. However, in the sealing experiments of two stop valves with different materials and surface roughness in this paper, the relationship between surface roughness and sealing performance is inconsistent with existing research. There should be another factor that affects the sealing performance of the stop valves more strongly. So a new sealing principle considering the roundness error is proposed. The sealing force, which is determined by the environmental pressure, creates radial deformation on the valve port. The radial deformation of the valve seat is analyzed by a validated finite element analysis (FEA) at various environmental pressures. Then the critical environmental pressure at which the leak stops is obtained when the radial deformation is greater than the roundness error, which is measured. The results show that the critical environmental pressure obtained by FEA is very close to that obtained by experiment. So the consideration of the roundness error of the valve seat is accurate and helpful to the research on the sealing performance of the ultra-high pressure stop valves, and the sealing performance of the ultra-high pressure stop valve can be easily evaluated by FEA.

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“…Pan et al 37 measured the friction forces for hydraulic cylinders under different operating conditions, and they estimate the lubrication stage based on the measured friction forces and Stribeck effect. Wang et al 38 investigated the influence of rod surface roughness on lubrication characteristics of hydraulic reciprocating O-ring seal by measured and analyzed the friction force and the net leakage. Otherwise, many researchers focus on the study of the development of a fluid film at a sealing contact and the transition from boundary to hydrodynamic lubrication.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on the friction and leakage of the metal rubber seal for reciprocating motion

Zhao

Yan

Dong

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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Metal seals are widely used to solve the sealing problem in severe conditions. For reciprocating motion sealing problems, a metal rubber seal was proposed by combining the metal rubber (MR) materials with an axial opening C-shape jacket. In this research, to study the reciprocating sealing performance of metal rubber seals, a series of leaking experiments were carried out with a dynamic sealing test system. The friction force of the MR seal was measured under a variety of hydraulic pressure and velocity conditions. The static leakage principle of MR seals for axial sealing was presented based on Persson’s contact mechanics, and a circular gap leakage model was employed to describe the leakage during reciprocating motions. The static and dynamic leakage experiments of metal rubber seals for axial sealing were conducted, and the influence factors of leakage rates were analyzed.

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Experimental investigations on the effect of rod surface roughness on lubrication characteristics of a hydraulic O-ring seal

Cited by 19 publications

References 21 publications

Overview of Materials Used for the Basic Elements of Hydraulic Actuators and Sealing Systems and Their Surfaces Modification Methods

Overview of Materials Used for the Basic Elements of Hydraulic Actuators and Sealing Systems and Their Surfaces Modification Methods

Research on the sealing performance of a seawater stop valve considering roundness error used in an 11000-m manned submersible

Experimental research on the friction and leakage of the metal rubber seal for reciprocating motion

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