Lubrication structure design of water lubricated rubber thrust bearing with spiral groove for shaftless rim driven thruster

Zhou, Guangwu; Li, Renpan; Liao, Daxin; Yang, Wenbo; Zhong, Ping

doi:10.1016/j.triboint.2022.108098

Cited by 14 publications

(4 citation statements)

References 36 publications

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“…However, when Re * > 0.3, the influence of the cavitation and centrifugal force must be considered [35]. In the present study, at 1,00,000 rpm rotor speed, as the modified Reynolds number is less than 0.1, the laminar flow of lubricant without cavitation and centrifugal effect is considered in the grooved region [39]. The steady-state Reynolds equation of thrust bearing in the polar coordinate system is expressed as,…”

Section: Assumptions For the Governing Equationmentioning

confidence: 95%

Design of herringbone grooved thrust bearing for locomotive turbocharger rotor

Mishra,

Behera

2024

Eng. Res. Express

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The herringbone texture exhibited excellent tribological performance to minimize friction and wear. However, the application of this texture in the development of grooved thrust bearings is limited. Therefore, in this study, an attempt was made to design an oil-lubricated herringbone grooved thrust bearing for high-speed locomotive turbochargers. The designed bearing accommodates the axial load generated due to the pressure difference between the turbine and compressor wheel. The bearing design starts with applying Newton's second law to predict the thrust load acting on the locomotive turbocharger rotor. The thrust load is calculated analytically and is found to be 4.54 kN for a design rotor speed of 1,00,000 rpm. Further, the herringbone grooved thrust bearing has been modeled numerically using non-linear Reynold's equation. The modified Reynolds equation is discretized using the finite volume method (FVM) and solved by successive over-relaxation (SOR) methodology to determine the static characteristics over the bearing surface. The developed HGTB is found to have a suitable load-carrying capacity of 4.6 kN, frictional torque of 0.25 N.m, and power loss of 2.98 kW. Further, a parametric analysis has been carried out to study the influence of design parameters such as the number of grooves, helix angle, angular groove width, groove depth, and speed on load-carrying capacity, frictional torque, and power loss.

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Section: Assumptions For the Governing Equationmentioning

confidence: 95%

Design of herringbone grooved thrust bearing for locomotive turbocharger rotor

Mishra,

Behera

2024

Eng. Res. Express

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“…Leng et al (Leng et al , 2021) conducted a dynamic analysis of water film in marine stern tube bearing considering roughness and deformation. To improve the load-bearing capacity of water-lubricated bearings at medium and low speeds, Zhou et al (Zhou et al , 2023) studied the structure design of water-lubricated spiral groove rubber thrust bearings. The optimization design of spiral groove structural parameters was conducted.…”

Section: Introductionmentioning

confidence: 99%

Effects of surface morphology on the performance of water-lubricated thrust bearings

Cheng,

2024

ILT

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Purpose As the crucial support component of the propeller power system, the reliability of the operation of submersible pumps is influenced by the lubrication performance of water-lubricated thrust bearings. When the water-lubricated thrust bearings are under start-stop or heavy load conditions, the effect of surface morphology is crucial as the mixed lubrication regime is encountered. This paper aims to develop one mixed lubrication model for the water-lubricated thrust bearings to predict the effects of surface skewness, kurtosis and roughness orientation on the loading carrying capacity and tribological behavior. Design/methodology/approach This paper developed one improved mixed lubrication model specifically for the water-lubricated thrust bearing system. In this model, the hydrodynamic model was improved by using the height of the rough surface and its probability density function, combined with the average flow model. The asperity contact model was improved by using the equation for the Pearson system of frequency curves to characterize the non-Gaussian aspect of surface roughness distribution. Findings According to the results, negative skewness, large kurtosis and lateral surface pattern can improve the tribological performance of water-lubricated thrust bearings. Optimizing the surface morphology is a reasonable design method that can improve the performance of water-lubricated thrust bearings. Originality/value In this paper, one mixed lubrication model specifically for the water-lubricated thrust bearing with the effect of surface roughness into consideration was developed. Based on the developed model, the effect of surface morphology on tribological behavior can be evaluated. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2023-0247/

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“…However, at normal temperature and pressure, the viscosity of water is much lower than that of oil, and the smaller viscosity makes the water film bearing capacity of a WLRB much smaller than that of an oil-lubricated bearing [4][5][6]. Submarines often operate at low speed and with a heavy load, making it difficult to form a water film in the bearing that supports dynamic lubrication, resulting in the bearing having a mixed lubrication or even a dry friction state [7][8][9]. Rubber, often used as a bearing liner, can generate frictional vibration noise under these conditions, which affects the navigation of warships [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Research on the Vibration Behavior of Ring–Block Friction Pair Made of Materials of Water-Lubricated Rubber Bearing under Special Operating Conditions

Zhang

Zhou

et al. 2023

Applied Sciences

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A water-lubricated rubber bearing (WLRB) is prone to generate frictional vibration noise under special operating conditions, which seriously affects the acoustic stealth performance of warships and threatens their navigation safety. Meanwhile, the main factor affecting the frictional vibration behavior of a WLRB is the materials of the friction pair. Therefore, this work selects a friction pair composed of a copper ring and a rubber block as the research object and studies the frictional vibration behavior of the ring–block friction pair under low-speed and starting conditions. The real friction coefficient curve is used to establish a transient dynamic finite element analysis model for the ring–block friction pair. The effects of the load, friction coefficient, and Young’s modulus on the frictional vibration behavior under special operating conditions are studied. The analysis’s results show that the frequency of the medium-high frequency friction-induced vibration disappears under low-speed operating conditions when the friction coefficient is below 0.1. During the startup process, even if the friction coefficient is very low, the medium-high frequency friction-induced vibration still exists. The research results provide ideas for future theoretical research and guidance suggestions for engineering practice.

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Lubrication structure design of water lubricated rubber thrust bearing with spiral groove for shaftless rim driven thruster

Cited by 14 publications

References 36 publications

Design of herringbone grooved thrust bearing for locomotive turbocharger rotor

Design of herringbone grooved thrust bearing for locomotive turbocharger rotor

Effects of surface morphology on the performance of water-lubricated thrust bearings

Research on the Vibration Behavior of Ring–Block Friction Pair Made of Materials of Water-Lubricated Rubber Bearing under Special Operating Conditions

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