Overview of Friction and Wear Performance of Sliding Bearings

Du, Fengming; Li, Dawei; Sa, Xiaoxia; Liu, Cong; Yu, Yang; Li, Chengdi; Wang, Jingsi; Wang, Weiwei

doi:10.3390/coatings12091303

Cited by 25 publications

(15 citation statements)

References 94 publications

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“…contacting surfaces experience high friction, such as in bearings or other sliding surfaces [14,[49][50][51]. Another important aspect is that Sb promotes the formation of a fine-grained structure in the coating, which contributes to the mechanical strength, crack resistance and wear resistance [52,53].…”

Section: Materials and Experimental Detailsmentioning

confidence: 99%

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Investigation of the Properties of Anti-Friction Coatings Deposited with Different Casting Methods

Kačinskas,

Baskutis,

Baskutienė

et al. 2024

Materials

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This article presents the research results of depositing anti-friction coatings (Babbitt) using three different casting methods: static casting, flame soldering, and clad welding. Babbitt alloy coatings deposited with different casting methods are discussed and explained in terms of changes in the coating properties, such as the microstructure, hardness, strength, and chemical composition. The results showed significant differences in the aforementioned properties, depending on the chosen coating deposition method. The results of the tests confirmed the importance of using shielding gas during deposition to ensure the chemical composition of the coating. The analysis revealed that decreases in the amounts of antimony and copper in the Babbitt coating compared with the initial concentrations were influenced by selective evaporation, oxidation, and the coating process parameters associated with different coating methods. To maintain the desired balance of mechanical properties in Babbitt coatings, it is important to control the antimony and copper contents. Clad welding deposition using a non-consumable tungsten electrode and argon shielding gas achieved a chemically stable coating quite close to the initial chemical composition of the Babbitt alloy.

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Section: Materials and Experimental Detailsmentioning

confidence: 99%

“…Sb adds hardness to the Babbitt alloy coating and increases its wear resistance [45][46][47][48]. This factor is critical in applications where the contacting surfaces experience high friction, such as in bearings or other sliding surfaces [14,[49][50][51].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Properties of Anti-Friction Coatings Deposited with Different Casting Methods

Kačinskas,

Baskutis,

Baskutienė

et al. 2024

Materials

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“…4,5 Most research on the tribological properties of polymers is measured with devices commonly referred to as pin-on-disc and pin-on-ring. 6,7 Wear mechanisms can be studied under lab conditions using these devices, reducing the material cost and improving the environmental sustainability. 8,9 However, since radial journal bearings have unique geometry and operating conditions, pin-on-disc and pin-on-ring studies only give us a basic idea about journal-bearing materials.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the tribological properties of POM and UHMWPE radial journal bearings made with different surface quality

Artun,

Azeloglu,

Taylan

2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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Journal bearings are essential machine elements that are widely used in the bearing of rotating or oscillating machine parts. Many studies in the literature examine the tribological properties of journal bearings. Most of these studies focus on polymer journal bearings and testing the tribological performances of different bearing materials with the same surface quality. In this article, radial journal bearings produced from ultra-high molecular weight polyethylene (UHMWPE) material and polyoxymethylene (POM) material in two different surface qualities in the range of N7–N8 and N10–N11 were tested under different load and different speed scenarios and their tribological performances and relationship of this performance between material and surface roughness were investigated. For this purpose, first of all, bearing samples were designed and manufactured. All samples’ tribological and physical properties before the tests were measured, and then tests were carried out according to the determined scenarios. Different loads, different speeds, and different sliding distances were used in the scenarios. As a result, 96 tests were carried out by testing each situation three times in eight scenarios, with two different surface qualities from two different materials. In the tests, the friction coefficient, temperature, and weight loss values of all samples were measured, and after the tests, surface roughness measurements and SEM analyses were made. As a result, all the data obtained from the tests and measuring devices were compared with the pre-test conditions and material and surface quality. The results obtained from the comparisons and the evaluations of tribological performance are discussed in the conclusion part. The study results show that the material and the surface quality significantly affect the tribological performance.

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“…Hydrodynamic journal bearing is a significant type of bearing which represents a core component in turbines, generators, pumps, and many types of machinery used in industrial applications [1]. This type of bearing is characterized by several features, such as high reliability, relatively low noise levels, and stable operation [2]. It is widely used in high-speed and heavy-loaded rotating machinery [3].…”

Section: Introductionmentioning

confidence: 99%

“…However, its performance can be affected by many factors, such as poor operating conditions, manufacturing errors, misalignment, and even long service times. These factors and many others may lead to the failure of the journal bearing or, at least, reduce efficiency, affecting machinery reliability [2]. The rotation of the shaft inside the bearing takes place within a clearance filled with a relevant lubricant, in the order of tens of microns.…”

Section: Introductionmentioning

confidence: 99%

A Novel Optimization Strategy of Bearing Geometry with a Length to Diameter Ratio of 1.25 under Severe Operating Conditions Using Taguchi Method

Jamali,

Mohammed,

Aljibori

et al. 2023

Designs

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Robust and well-designed rotor-bearing systems ensure safe operation and a high level of reliability under severe operating conditions. A deviation in the shaft axis with respect to the bearing longitudinal axis represents one of the most unavoidable problems in bearing systems. This deviation results from installation errors, manufacturing errors, shaft deformation under heavy loads, bearing wear, and many other causes. Each of these deviation sources has its negative consequences on the designed characteristics of the system. This work deals with the geometrical design of a journal bearing using three forms of profiles (linear (n=1), quadratic n=2 and cubic (n=3) profiles) in order to enhance bearing performance despite the presence of the inevitable shaft deviation. In addition, a wide range of bearing profile parameters are considered in the analysis to optimize the bearing profile based on the use of the Taguchi method. A general form of shaft deviation is considered to account for both horizontal and vertical deviations. A numerical solution is obtained using the finite difference method. The results show that all three suggested forms of bearing profiles elevate the film thickness significantly and also reduce the friction coefficient, but with different effects on the maximum pressure values. The Taguchi method illustrates that the optimal geometrical design parameters are the quadratic profile and the modification of one-fifth of the bearing width from both sides at a height of just less than half the radial clearance (0.4 C) at the bearing edges. These values give the best combination of the considered main bearing characteristics: the minimum film thickness, coefficient of friction, and maximum pressure. The results show that the minimum film thickness is increased by 184%, the maximum pressure is reduced by 15.1% and the friction coefficient is decreased by 6.4% due to the use of the suggested design. The outcome of this work represents an important enhancement step for the rotor bearing performance to work safely with high reliability under severe shaft deviation levels. This can be implied at the design stage of the bearing, which requires prior knowledge about the operating conditions in order to have better estimation for the levels of shaft deviation.

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Overview of Friction and Wear Performance of Sliding Bearings

Cited by 25 publications

References 94 publications

Investigation of the Properties of Anti-Friction Coatings Deposited with Different Casting Methods

Investigation of the Properties of Anti-Friction Coatings Deposited with Different Casting Methods

Investigation of the tribological properties of POM and UHMWPE radial journal bearings made with different surface quality

A Novel Optimization Strategy of Bearing Geometry with a Length to Diameter Ratio of 1.25 under Severe Operating Conditions Using Taguchi Method

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