Effect of manufacturing errors of the pad sliding surface on the performance of the hydrodynamic thrust bearing

Zoupas, Loukas; Wodtke, Michał; Papadopoulos, Christos I.; Wasilczuk, Michał

doi:10.1016/j.triboint.2019.01.046

Cited by 30 publications

(16 citation statements)

References 26 publications

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“…In this case, the tolerance for the manufacture of parts will have the highest permissible value. The machine will work for a specified period of time without repair (or with a specified number of repairs); therefore the cost of its operation will be close to the minimum, since in most cases the bulk of these costs are repair costs [3,5]. To ensure such a value of the tolerance for wear it is necessary in the manufacture of parts to obtain the roughness and physical and mechanical properties of their surfaces, providing the lowest possible under these conditions, the rate of wear Vw of the mating parts, that is the minimum thickness of the layer of material removed from the surfaces of parts per unit time during friction.…”

Section: Review Of Theoretical Studiesmentioning

confidence: 99%

Definition of the Parameters of Surface Layer Based on Functionality of Parts

Клепцов

2019

MATEC Web Conf.

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The problem of increased reliability of parts is solved in the direction of obtaining the characteristics of their surface layer, providing the highest possible wear resistance. Tolerances on the accuracy of the machine, set on the basis of its functionality, are divided into tolerances for the manufacture of the machine and wear tolerances. In order to increase the reliability of products, they strive for the greatest possible tolerance for wear, increasing the accuracy of parts manufacturing. As a result, the costs of manufacturing the machine unnecessarily increase. The dependence of the rate of wear of parts on the roughness and hardness of their surfaces is extreme; therefore, the task of determining the parameters of the surface layer of the parts is optimization. The use of the wear rate of rubbing surfaces is justified as an optimization criterion. The technique and algorithm for assigning the parameters of the surface layer, providing a minimum rate of wear of the mating surfaces are presented. To solve this problem, a random search method was used. A method for calculating the tolerances for the manufacture and wear of mated parts operating under friction conditions is proposed.

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Section: Review Of Theoretical Studiesmentioning

confidence: 99%

Definition of the Parameters of Surface Layer Based on Functionality of Parts

Клепцов

2019

MATEC Web Conf.

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“…The results show that form errors do have a significant influence on the dynamic performance of journal bearings. Under the action of thrust load, Loukas Zoupas [20] assumed that the pad was deformed about the pivot point. The results demonstrate that manufacturing errors may affect substantially bearing performance and should be taken into consideration in the design of large tilting pad thrust bearings.…”

Section: Introductionmentioning

confidence: 99%

Study on the influence of thrust plate tilt on performance of distributed hybrid thrust bearing with tilting pad

Chen

Wang

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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A kind of distributed hybrid thrust bearing with tilting pad is proposed in this paper, and the influence of thrust plate tilt on bearing performance is analyzed. The film thickness equation is constructed, considering the machining error and installation error synthetically which are the main causes of thrust plate tilt. Substituting the film thickness equation to the classical calculation equation of thrust bearing, the time-varying stiffness of the bearing is obtained. The influence of tilt angle of thrust plate on time-varying stiffness of the bearing is analyzed through the case bearing, and the bearing performance is controlled by change pivot position of tilting pad which is represented by preload coefficient. The results show that the thrust plate tilt causes the fluctuation of the bearing stiffness during the rotation period, and this fluctuation is exacerbated as the increasing of the tilt angle. The bearing stiffness increases and the tilt angle range of the thrust plate decreases accordingly, because that the increasing of the preload coefficient of tilting pad makes the bearing unilateral gap decrease. However, the large preload coefficient exacerbates the adverse effect of thrust plate tilt on the bearing, so the preload coefficient of the tilting pad needs to be adjusted reasonably. The research in this paper can provide a theoretical reference for the optimization of the tilt angle of the thrust plate and provide data support for the engineering application of distributed hybrid thrust bearing with tilting pad. KeywordsHybrid thrust bearing • Thrust plate tilt • Tilting pad • Time-varying stiffness * Runlin Chen

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“…Wakuda et al 5 had determined that the porosity of the tribologically controlled surface could help reduce the friction effect at the sliding contact interface. The thrust loading pads were assumed to be deformed near the interface contact points and additional errors with different manufacturing types and amplitudes, were comprehensively considered by Zoupasa et al 6 Wodtke et al 7 calculated the equilibrium position of the thrust loading pad by Newton–Raphson iterative method numerical program. Thrust bearing main performance quantitative indexes (such as maximum film pressure/oil temperature and minimum film thickness/anti-friction torque) were analyzed by Lin et al 8 Zhai et al 9 proposed the thermoelastic hydrodynamic (TEHD) lubrication analysis of thrust bearings by combining the classic Reynolds equations and the finite element analysis (FEA) method.…”

Section: Introductionmentioning

confidence: 99%

Transient temperature field analysis of variable viscosity RTHSB with a special structural cavity

Ruan

Wang

et al. 2020

Advances in Mechanical Engineering

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A radial thrust hydrodynamic sliding bearing (RTHSB) with special shaped cavity had been designed. Taking the instantaneous temperature rise characteristics of RTHSB as an analysis object, considering the influence of inlet lubricating oil velocity and transmission shaft speed, a dynamic simulation method of variable viscosity temperature field is proposed, and the mathematical model of instantaneous temperature rise of time-varying oil film is constructed. The correlation equation between instantaneous temperature rise and oil film variable viscosity is analyzed, the lubricating performance of a special-shaped cavity with variable thickness of the oil film considering real-time full operating conditions is revealed, and the alternating transient laws of oil film thickness with variable viscosity and its instantaneous temperature rise for no-load, heavy-load, and different rotating speeds are studied. It is obtained that the higher temperature area of profiled shaped cavity on reverse flow side extends to oil seal side with increase of rotating speed. The dynamic simulation of variable viscosity of RTHSB with different film thickness is simulated by using FLUENT software and the trend of transient film temperature field distribution of in special-shaped cavity is evaluated. The rationality of the mechanism analysis and numerical simulation results in this paper has been verified.

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Effect of manufacturing errors of the pad sliding surface on the performance of the hydrodynamic thrust bearing

Cited by 30 publications

References 26 publications

Definition of the Parameters of Surface Layer Based on Functionality of Parts

Definition of the Parameters of Surface Layer Based on Functionality of Parts

Study on the influence of thrust plate tilt on performance of distributed hybrid thrust bearing with tilting pad

Transient temperature field analysis of variable viscosity RTHSB with a special structural cavity

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