Experimental investigation of dynamic behavior of rotor system with a novel double layers flexible support tilting pad bearing

Huang, Guangyao; Wang, Xiaojing; Qin, Xin; Zhu, Liming; Yi, Shuxiang

doi:10.1177/16878132221116482

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…The rotor-bearing system depicted in Figure 2 serves as the experimental test apparatus [34]. The rotor system consists of a flexible main shaft supported by a pair of test bearings and driven by a variable-speed electric main spindle via a flexible coupling.…”

Section: Methodsmentioning

confidence: 99%

Experimental Study of Piezoelectric Control for Changing Tilting Pad Journal Bearing Circumferential Angle and Radial Displacement

Peng,

Qin,

Wang

et al. 2023

Lubricants

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In order to improve the vibration performance of the oil-lubricated tilting pad bearing system, an experimental approach using a piezoelectric actuator to control two new flexible tilting pads is proposed. The performance test bench of the bearing–rotor system based on a tilting pad bearing with a flexible support is established. The different circumferential angles of the angle bearing tilting pad and the radial displacement of the displacement bearing are tested by a piezoelectric actuator. At the same time, the trajectory of the rotor center under actual operating conditions is analyzed. The experimental results show that the amplitude of the rotor journal can be significantly reduced by controlling the control variables related to the circumferential angle and radial displacement of the bearing bush. Therefore, this control improvement can improve the vibration performance of two new flexible tilting pad bearing–rotor systems. The technical means are provided for the active control of an oil-lubricated tilting pad bearing.

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Section: Methodsmentioning

confidence: 99%

Experimental Study of Piezoelectric Control for Changing Tilting Pad Journal Bearing Circumferential Angle and Radial Displacement

Peng,

Qin,

Wang

et al. 2023

Lubricants

Self Cite

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“…Bearing performance is improved by optimizing bearing structural parameters such as tile wrap angle [10] , aspect ratio [11] , bearing clearance [12] , pivot position [13] and pivot flexibility [14][15] [16] . Over the years, a large number of theoretical and experimental studies have provided an important assessment basis for the design and reliability application of tilting pad bearings, forming a common knowledge support [8] [9] . Although the helicoidal tile bearings have a more perfect analysis method in theory, the bearings are not obvious enough in the low-speed operation stage such as start-stop of the unit or panning, due to the dynamic pressure effect, the boundary lubrication between the tiles and the shaft exists, and the friction heat generation may lead to the local melting of the surface of the tiles, so it is necessary to further improve the lubrication model of the bearings at low speeds, and to get the performance of the bearings under the actual operating conditions of the unit.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Low Speed Lubrication Characteristics of Large Tilting Pad Bearings

Yang,

quan,

Chen

et al. 2024

Preprint

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Abstract：For large generator sets, during low-speed operation such as start-stop or low-speed driving, there may be instances where hydrodynamic lubrication can’t be established, leading to boundary lubrication between bearing and the shaft. This situation can result in bearing damage and cause safety incidents. Therefore, it is necessary to study the lubrication characteristics of bearings under low-speed operation. In this paper, the lubrication properties of the unevenly distributed six-pad tilting pad bearings in an in-service unit are analyzed through theoretical calculations. The analysis focuses on parameters such as film thickness and temperature of the bearing pads under low-speed operating conditions. A full-size test bench is set up to examine the lubrication properties of bearings made of two materials - Babbitt alloy and fluoroplastic, and the pads temperatures, film thicknesses, and vibration characteristics of the bearings are tested under actual operating conditions. The test results show that: the 6-pad small wrap angle bearings designed do not have tile burning phenomenon under low-speed working condition (40r/min), the bearing made of fluoroplastic material has lower temperatures compared to those made of Babbitt alloy, with higher pivot film thickness than that of the Babbitt alloy; The bearing pivot film thickness value using VG68 oil is larger than that of VG46, and the values of the temperature of the pad measurement point are larger than that of VG46.This research paper validates the feasibility of the bearing design scheme for this unit and provides data support for the design and safe operation of similar units.

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“…Chen et al 1 established the lubrication model of tilting pad thrust bearing considering verticality error, and analyzed the minimum film thickness, maximum temperature rise and axial stiffness of tilting pad thrust bearing. Huang et al 2 proposed a new type of double-layer flexible support tilting pad bearing, which adjusted the angle of the tilting pad by controlling the bias spring to ensure the formation of the lubricating oil film. Dongil and Alan 3 studied the influence of different type's pivots of tilting pad journal bearings on the vibration degree and instability speed range of Morton effect.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of tilting pad thrust bearing incorporating the surface roughness, texture and turbulence effect

Wang,

Zou,

Duan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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In order to improve the lubrication performance of the friction pair, the effect of composite micro-texture on the lubrication performance of the tilting pad thrust bearing is studied. Based on the structural model of tilting pad thrust bearing considering composite micro-texture, the lubrication characteristics of thrust bearing with composite micro-texture parameters and tilting pad parameters are analyzed. At the same time, the theoretical model of tilting pad composite micro-texture bearing considering roughness and turbulence effect is established, and the performance of thrust bearing considering roughness and turbulence effect is studied. The results show that the performance of composite micro-textured bearings is better than that of single micro-textured bearings, the performance of tilting pad bearings is better than that of parallel pad bearings, and the performance of circular composite fish-shaped micro-textured tilting pad bearings is the best. The optimal bearing fulcrum position is near the inner diameter, and the optimal fulcrum circumferential inclination angle is about 27.5°. Considering the roughness and turbulence effect, the maximum pressure and bearing capacity of the bearing improves, and the friction coefficient significantly reduces.

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Experimental investigation of dynamic behavior of rotor system with a novel double layers flexible support tilting pad bearing

Cited by 7 publications

References 22 publications

Experimental Study of Piezoelectric Control for Changing Tilting Pad Journal Bearing Circumferential Angle and Radial Displacement

Experimental Study of Piezoelectric Control for Changing Tilting Pad Journal Bearing Circumferential Angle and Radial Displacement

Experimental Study on Low Speed Lubrication Characteristics of Large Tilting Pad Bearings

Performance analysis of tilting pad thrust bearing incorporating the surface roughness, texture and turbulence effect

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