Magnetic fluid composite tilting-pad radial bearing based on Halbach array

Abstract

The invention discloses a magnetic fluid composite tilting-pad radial bearing based on a Halbach array. The magnetic fluid composite tilting-pad radial bearing comprises a shaft sleeve, a bearing bush, a bearing shell and a stop check ring, a first permanent magnet inner core is arranged in the shaft sleeve, a second permanent magnet inner core is arranged in the bearing bush, the magnetizing direction of the first permanent magnet inner core in the shaft sleeve and the magnetizing direction of the second permanent magnet inner core in the bearing bush are opposite, permanent magnet repulsiveforce exists between the shaft sleeve and the bearing bush, the bearing bush comprises a plurality of sector plate strip-shaped bearing bush units distributed circumferentially and evenly, an arc bossis arranged on the outer sides of the sector plate strip-shaped bearing bush units, and the arc boss and an inward-concave arc groove formed in the bearing shell are matched to constitute a tilting-pad structure. The idea that permanent magnetic force and liquid membrane force jointly bear the bearing load and the tilting-pad structure is proposed, and the load is borne jointly by permanent magnetic repulsive force generated between the permanent magnet inner cores and the liquid membrane force provided by a lubrication fluid membrane in the bearing operation process; and meanwhile, the tilting-pad structure enables lubrication fluid to be more easily wedged into a friction pair gap, and thus the stability of bearing operation is ensured.

Description

technical field [0001] The invention belongs to the technical field of sliding bearings, in particular to a magnetic fluid composite tilting pad radial bearing based on a Halbach array. Background technique [0002] The stern bearing is an important part of the ship's propulsion shaft system, which plays a role in supporting the propeller shaft and the propeller. With the increase of the tonnage of the ship, the weight of the propeller and the propeller shaft continues to increase, which puts forward higher requirements for the carrying capacity of the stern bearing. At present, bearing sleeves and bearing bushes mainly include copper-rubber, copper-sailong or flying dragon, copper-alloy and metal materials. Especially at low speeds, it is difficult to form a good bearing water film to provide sufficient bearing capacity, resulting in boundary lubrication or even dry friction between the two friction pairs, resulting in poor operation of the bearing. Therefore, it is diffi...

AI Technical Summary

Problems solved by technology

At present, bearing sleeves and bearing bushes mainly include copper-rubber, copper-sailong or flying dragon, copper-alloy and metal materials. It is difficult to form a good load-bearing water film to provide sufficient load-bearing capacity especially at low speeds, resulting in boundary lubrication or even dry friction between the two friction pairs, resulting in poor operation of the bearing

Therefore, it is difficult to meet the harsh working conditions of low speed and heavy load by relying entirely on the design of hydrodynamic pressure lubrication.

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