Effect of Variation of Gap Thickness of the Thrust Bearing on Gap Pressure and Stiffness of the Aerostatic Spindle in Vertical Milling

Huang, Te Yen; Weng, Shi Jie; Hsu, Su Ming

doi:10.4028/www.scientific.net/kem.739.1

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…It was found that pressure was significantly influenced by the film's thickness. Increasing spindle speed could lead to higher pressure on the spindle surface and increased spindle stiffness [34]. Zheng et al investigated the hydrodynamic hammering phenomenon and performance of a concave-hole single-tile bearing.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Analysis of Adopting the Hydrogen Hydrostatic Thrust Bearing

Qiang,

Liu,

Zhao

et al. 2023

Applied Sciences

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The hydrogen hydrostatic thrust bearing (HHTB) is a key component of hydrogen liquefaction that impacts turbo-expander characteristics. To analyze the feasibility of using the HHTB in this application, characteristics of HHTBs were calculated using a CFD model. To upgrade the performance of the HHTB, the impacts of bearing structure and operating parameters on static performance were investigated. Dynamic characteristics of the HHTB were studied using the dynamic grid method. It was found that the load capacity of the HHTB is less than that of helium-lubricated bearings but higher than that of air- and methane-lubricated bearings. The turbulent kinetic energy of hydrogen is higher than that of other gases. Load capacity can be enhanced through boosting supplied pressure, expanding the diameter of supply orifices, reducing gas film clearance, increasing the orifices quantity and setting a circumferential groove. A reduction in disturbance amplitude slightly increased the bearing’s dynamic stiffness. The dynamic stability of the HHTB was improved by a small film clearance in response to disturbance.

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Section: Introductionmentioning

confidence: 99%

Feasibility Analysis of Adopting the Hydrogen Hydrostatic Thrust Bearing

Qiang,

Liu,

Zhao

et al. 2023

Applied Sciences

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Centrifugal Effect of Thrust Plate of Water-lubricated Thrust Bearing and its Influence Mode

Zhang

Zheng

2020

J. Phys.: Conf. Ser.

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Water-lubricated thrust bearing with water as the medium, is a mechanical transmission medium with energy saving and environmental protection. The thrust bearing with water medium can reduce the wear of bearing and the friction between gears. At the same time, the shape of the rolling bearing in the state of high-speed operation is bound to undergo a series of changes, and the radial working clearance is also slightly changed due to the centrifugal effect under high-speed operation, which has a certain degree of influence on the thrust disc. The shielded thrust disc avoids the problem of loose sealing, and the tilting thrust bearing has the advantages of obvious centrifugal effect, large rotating inertia of the thrust disc and large bearing size. In view of the characteristics of thrust bearing structure of water medium, this study established the coupling calculation model of the thrust plate after centrifugal denatination based on the finite element analysis method, and explored the design parameters of two key clearances in the assembly structure of the thrust plate. It is found in this paper that the tilting pad bearing under low speed steering will compensate for the deformation of the thrust disc, and when the rotating speed is greater than 3600r/min, the centrifugal deformation of the thrust disc will increase in morphology and even lead to lubrication failure. Therefore, the speed is an important factor that influences the centrifugal effect of the thrust disc and the bearing disc body enlargement.

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Simulation Design and Numerical Analysis of Bearing Capacity of Water Lubricated Thrust Bearing

Zhang

Zheng

2020

IOP Conf. Ser.: Earth Environ. Sci.

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Thrust bearing is widely used in all kinds of rotating machines, and the lubrication capacity and bearing capacity of sliding bearing have very important evaluation parameters for the performance indexes of safety, economy and stability of the machine. With the proposal of national industrialization strategy, the development direction of all kinds of machines to high-speed and large-scale is becoming more and more clear. Therefore, the analysis of bearing capacity and lubrication performance of sliding bearing is becoming more and more important. The main goal of this paper is to carry out simulation design and optimization of bearing capacity of thrust bearing, and carry out numerical analysis of bearing capacity after optimization design. In the aspect of research methods, this paper applies the Reynolds equation and its boundary conditions to the analysis of machine bearing capacity, and discretizes the equation to a certain extent, so as to ensure that the factors that change the performance of water lubricated thrust bearing with the change of applicable conditions are taken into account. The hydrodynamic lubrication value of the water lubricated thrust bearing obtained by the experiment in this paper is consistent with the temperature field value of the finite solution, which shows that the measurement results of the water film thickness, pressure distribution and the temperature of the thrust pad in the experiment are in good agreement with the theoretical calculation results.

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Effect of Variation of Gap Thickness of the Thrust Bearing on Gap Pressure and Stiffness of the Aerostatic Spindle in Vertical Milling

Cited by 3 publications

References 4 publications

Feasibility Analysis of Adopting the Hydrogen Hydrostatic Thrust Bearing

Feasibility Analysis of Adopting the Hydrogen Hydrostatic Thrust Bearing

Centrifugal Effect of Thrust Plate of Water-lubricated Thrust Bearing and its Influence Mode

Simulation Design and Numerical Analysis of Bearing Capacity of Water Lubricated Thrust Bearing

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