Magnetic levitation is becoming widely applicable in magnetic bearings, high-speed ground transportation, vibration isolation, etc., [1]. For example, magnetic bearings support radial and thrust loads in rotating machinery. In addition, magnetic suspension generates levitation action in rectilinear motion devices such as high-speed ground transportation systems. Magnetic levitation is immensely...

The influence of pad facing material on hydrodynamic lubrication in tilting-pad thrustbearings is investigated in terms of pad and oil-film temperatures and oil-film thickness. Two tilting-pad thrust bearings are examined: one with babbitt pad facing, the other with a layer of a PTFE based composite material. Frictional torque, pad, collar and oil-film temperatures and oil-film thicknes...

Abstract The axle load acts on the box unit and has shock-pulse nature when car is moving, that can lead to a mutual change in surface positions of roller ends with edges bearing races. ways are proposed optimize internal geometry radial end contact elements unit. It eliminate occurrence possible conditions movement rollers into thrust locking by increasing minimum limit clearance box.

The active control of hydrodynamic bearings is beginning to receive more attention in the pursuit lower power losses and reduced maintenance. This paper presents a method by which, from simple measurements, rich information can be deduced running bearing that used modify operating parameters unit. line-pivot, unidirectional, steadily loaded, directly lubricated tilting pad thrust bearing. achie...

The widespread application of superconducting magnetic levitation bearings is limited by their relatively low stiffness. Recently we investigated a novel thrust bearing geometry comprised conical frustum (or truncated cone) shaped permanent magnet levitating inside matching tapered hole machined into high-temperature superconductor bulk. This configuration was found to produce superior restorin...

Two types of passive magnetic lift bearings were evaluated in terms of thrust force and eddy current losses. The first type of bearings were based on two sets of segmented Halbach arrays mounted in repulsive mode, and the second type was based on ring-magnets. The eddy-currents studied arose in the bearing due to manufacturing variations of magnetic remanence, and due to non-radial magnetizatio...

A baseline theory is developed in this paper for the design of oil-lubricated centrally pivoted plane-pad thrust bearings. By focusing on the hydrodynamics generated by the viscosity-temperature effects of the lubricating oil, a mathematical model is derived with a single dimensionless parameter Wth. The nominal value of Wth is 0.1 for typical pad bearings in current industrial practice. The th...