Controlling the characteristics of the hybrid bearing by means of an electromagnetic actuator

Abstract

The increase in the power and efficiency of the newly developed rotating mechanisms is inextricably linked with the growth of their rotation speeds and the overall level of vibration. Gas-dynamic foil bearings have a higher priority for use in high-speed mechanisms due to their practically unlimited maximum speed, the absence of an additional lubrication system, low friction power losses, etc. However, increased friction and low load-carrying capacity during the start-stop period is a problem for the further application of gas-dynamic foil bearings. The hybrid bearing studied in this work includes a rolling-element bearing, a gas-dynamic foil bearing and actuators. The hybrid bearing studied in this work includes a rolling-element bearing, a gas-dynamic foil bearing and actuators. Actuators allow during operation to switch from one type of bearing to another, as well as to control the radial gap of the gas-dynamic foil bearing, changing the dynamic characteristics of the hybrid bearing. The new designed hybrid bearing was manufactured and tested on a rotordynamic test rig in this study. A theoretical model of the hybrid bearing rotor system was built and demonstrated by the experiment results.

Calculation model for lubrication of bearings with unconventional support surface profile and fusible shaft surface coating

“…A large number of research works focus on the development of a calculation model for radial sliding bearings with metal coating [1][2][3][4][5][6][7][8][9][10][11][12]. However, lubrication on fused coatings is not a self-sustaining process.…”

Increase of wear resistance of tribocontact with low-melting metal and porous coating

“…The use of such materials considerably improves the performance of tribounits. However, existing design methods do not sufficiently take into account the specifics of low-melting metal and porous coatings, their rheological properties, as well as their universal nature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Ferromagnetic Lubricants in a Bearing with a Porous Coating of a Base Ring

“…A fair number of works are devoted to the development of the design model of thrust friction bearings with a porous coating on the surface of a base ring [1][2][3][4][5][6][7][8][9][10][11][12]. However, they did not take into account the rheological properties of ferromagnetic lubricants and the incomplete (pre-emergency) filling of the working gap [13][14][15][16][17][18][19][20][21][22][23][24].…”