Numerical study on static performance of hydrodynamic bearing in high-speed liquid hydrogen centrifugal pump

Lai, Tianwei; Yan, Shaohang; Wang, Yan‐Wu; Li, Xue; Qiang, Mingchen; Ding, Wenjing; Liu, Yutao; Hou, Yu

doi:10.1016/j.ijhydene.2022.09.271

Cited by 8 publications

(2 citation statements)

References 29 publications

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“…3,4 Due to the low viscosity of LH 2 , the rotational speed of LH 2 lubricated bearing is much higher than that of other liquid bearings to acquire the same load capacity. 5 Therefore, the pressure variation of LH 2 lubricated bearings is extremely violent caused by shear and dynamic pressure effects. 1 Cavitation can be generated due to local pressure depression.…”

Section: Introductionmentioning

confidence: 99%

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Yan

Lai

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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Spiral-grooved thrust bearing (SGTB) is one of the important kinds of supporting component in high-speed rotating devices. The high shearing rate of SGTB can produce a large amount of viscous dissipative heat, which causes a temperature rise. Dynamic pressure effect induces pressure variation in the herringbone SGTB (HSGTB). When liquid hydrogen (LH2) is used as a lubricant, cavitation caused by lower pressure and higher temperature can result in lubrication failure. Especially, the cavitation of LH2 is more prone to occur because of its small temperature difference between the triple point and critical point, and the smaller supercooling degree. The influence of thermal properties on the phase transition process of LH2 is more significant. In this paper, the thermal and mechanical performance of three different structures of LH2 lubricated SGTB is compared by considering viscous dissipative heat. Herringbone SGTB is proposed for better performance and feasibility of its application in LH2 lubrication. The static performances of HSGTB such as load capacity, friction torque, cavitation rate, average temperature, and heat flux have been evaluated numerically by introducing the cryogenic cavitation model. The orthogonal sampling method and range analysis are used to optimize the HSGTB structure. Compared with the original HSGTB, cavitation rate and temperature rise are significantly suppressed in the optimized HSGTB. In addition, the load capacity is also improved effectively at high rotational speed, which is expected to be applied to high-speed centrifugal pumps.

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Section: Introductionmentioning

confidence: 99%

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Yan

Lai

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Lai T et al proposed a new type of grooved bearing using liquid hydrogen as lubricant and studied the cavitation effect of the bearing. In addition, the structural parameters are optimized by the orthogonal design method [22]. Xinkai Feng et al established a thermoelastic flow lubrication model for tiltable tile thrust bearings and investigated the effects of elastic deformation, thermal deformation, and load on the static and dynamic characteristics of the oil film [23].…”

mentioning

confidence: 99%

Research on static characteristics of oil pad tiltable hydrostatic thrust bearing under eccentric load

Sun

et al. 2023

Preprint

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In most parts processing, the offset load of the worktable will be caused by many factors, such as the asymmetry of the workpiece shape and the offset of the clamping position. In this paper, the oil-cushion tilting double rectangular cavity hydrostatic thrust bearing is taken as the research object, and its static characteristics under abnormal load conditions are studied. The effects of rotation speed, offset distance and load on its static features are analyzed. The results show that the influence on the oil film pressure field under the eccentric load conditions is in descending order of load, speed, and offset distance. The effect of load and speed on the oil film pressure is positively related to the offset distance. The appropriate size of the offset distance has a specific gain on the bearing capacity improvement. The influence on the oil film temperature field under the abnormal load condition is in descending order of the rotation speed, the load and the offset distance. After the offset distance increases, the effect of load on the oil film temperature slightly increases, and the oil film temperature rise is within the safe operating range of the lubricating oil.

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Experimental and numerical study on cavitation flow characteristics of refrigerants with different thermophysical properties in confined micro-clearance

Yan,

Lai,

Wang

et al. 2025

Case Studies in Thermal Engineering

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Numerical study on static performance of hydrodynamic bearing in high-speed liquid hydrogen centrifugal pump

Cited by 8 publications

References 29 publications

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Structural selection of liquid hydrogen lubricated herringbone spiral-grooved thrust bearing considering viscous dissipative heat

Research on static characteristics of oil pad tiltable hydrostatic thrust bearing under eccentric load

Experimental and numerical study on cavitation flow characteristics of refrigerants with different thermophysical properties in confined micro-clearance

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