Experimental investigation of friction behaviors for double-acting hydraulic actuators with different reciprocating seals

Pan, Qing; Zeng, Yanwei; Li, Yibo; Jiang, Xuepeng; Huang, Minghui

doi:10.1016/j.triboint.2020.106506

Cited by 30 publications

(31 citation statements)

References 37 publications

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“…One of the most commonly used sealing materials is PTFE (polytetrafluoroethylene) [5,10,11,32,50,51,54,104] or PTFE with added bronze [13,51,54,104]. PTFE with other materials, e.g., carbon, is also mentioned in [104].…”

Section: U-profile Sealing For Double-acting Actuators Consisting Ofmentioning

confidence: 99%

“…In [ 54 ], it was noted that the friction force and sensitivity to load variation is related to the type and shape of the seal used. It was also found that friction may negatively impact the accuracy of position adjustment.…”

Section: Failures Of Hydraulic Actuatorsmentioning

confidence: 99%

“…In [ 54 ], three types of piston sealing systems used were analyzed. These are: combined sealing system consisting of: flexible sealing element; two rings to prevent squeezing of the seals; two piston guide rings.…”

Section: Materials and Surface Modifications Used For Hydraulic Acmentioning

confidence: 99%

“…In [ 54 ], pure PTFE was used for piston guide rings, while PTFE with bronze was used for backup rings for pistons and guide ring for the piston rod. In [ 104 ], the results showed that pure PTFE, bronze-filled PTFE, and carbon-filled PTFE allow for lower breakaway friction.…”

Section: Materials and Surface Modifications Used For Hydraulic Acmentioning

confidence: 99%

“…The regular PU mentioned in [ 51 ] is also a frequently used material for sealing systems [ 7 , 8 , 11 , 48 , 52 , 54 , 57 , 105 ]. It can also be found in thermoplastic version of TPU [ 9 , 10 , 13 , 50 ] or as HPU (resistant to hydrolysis) [ 13 ].…”

Section: Materials and Surface Modifications Used For Hydraulic Acmentioning

confidence: 99%

See 4 more Smart Citations

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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Section: U-profile Sealing For Double-acting Actuators Consisting Ofmentioning

confidence: 99%

Section: Failures Of Hydraulic Actuatorsmentioning

confidence: 99%

Section: Materials and Surface Modifications Used For Hydraulic Acmentioning

confidence: 99%

Section: Materials and Surface Modifications Used For Hydraulic Acmentioning

confidence: 99%

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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Identification of system parameters of a large‐scale dynamic multiaxial testing facility

Lin,

Yu,

Lin

et al. 2024

Earthq Engng Struct Dyn

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Large‐scale multiaxial testing facilities mainly serve to experimentally examine the horizontal behavior of full‐scale critical structural members, such as columns and seismic isolation bearings, on which a large vertical compression load is exerted as they simultaneously undergo horizontal deformation. The system friction and inertia force play an important role in obtaining sufficiently reliable test results, and it is not easy to comprehensively grasp all the issues involved. To understand the system friction and inertia force of the Bi‐Axial Dynamic Testing System (BATS) at the National Center for Research on Earthquake Engineering Tainan laboratory and to avoid complexity caused by specimens as much as possible, a lubricated flat sliding bearing is chosen as the specimen to be tested under horizontal triangular and sinusoidal reversed loading together with a constant vertical compression load. When no specimens are installed, that is, without vertical compression loading, the system friction of BATS generated by the various sliding surfaces can be identified and mathematically characterized using the horizontal triangular reversed loading test results; then, the effective mass of BATS can be estimated using the horizontal sinusoidal reversal loading test results to solve the inertia force problem. When applying a vertical compression load, it is assumed that the system friction of BATS and the shear force of the specimen are simply related to the applied total normal force (or vertical compression load) and horizontal excitation rate. An iteration methodology is proposed to identify and mathematically describe the dependency of the friction performance of BATS and the specimen on total normal forces (or vertical compression loads) and horizontal excitation rates by iterating the horizontal triangular and sinusoidal reversed loading test results. Finally, a lead‐rubber bearing and a direct force measurement system are connected in series such that the measurement system precludes the system friction and inertia force and a series of tests are conducted. The reliability of the proposed mathematical model for BATS and the feasibility of the proposed direct force measurement strategy are further demonstrated by comparing the calibrated force response with the directly measured response.

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Efficiency comparison of various friction models of a hydraulic cylinder in the framework of multibody system dynamics

2021

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Dynamic simulation of mechanical systems can be performed using a multibody system dynamics approach. The approach allows to account systems of other physical nature, such as hydraulic actuators. In such systems, the nonlinearity and numerical stiffness introduced by the friction model of the hydraulic cylinders can be an important aspect to consider in the modeling because it can lead to poor computational efficiency. This paper couples various friction models of a hydraulic cylinder with the equations of motion of a hydraulically actuated multibody system in a monolithic framework. To this end, two static friction models, the Bengisu–Akay model and Brown–McPhee model, and two dynamic friction models, the LuGre model and modified LuGre model, are considered in this work. A hydraulically actuated four-bar mechanism is exemplified as a case study. The four modeling approaches are compared based on the work cycle, friction force, energy balance, and numerical efficiency. It is concluded that the Brown–McPhee approach is numerically the most efficient approach and it is well able to describe usual friction characteristics in dynamic simulation of hydraulically actuated multibody systems.

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Experimental investigation of friction behaviors for double-acting hydraulic actuators with different reciprocating seals

Cited by 30 publications

References 37 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

Identification of system parameters of a large‐scale dynamic multiaxial testing facility

Efficiency comparison of various friction models of a hydraulic cylinder in the framework of multibody system dynamics

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