Intermediate bearing for ship

Abstract

An intermediate bearing for a ship is characterized in that a bearing cover is arranged on a bearing block, a bearing shell frame is arranged on the inner side of the bearing cover, the bearing shell frame is divided into a bearing shell frame body A arranged at the upper portion and a bearing shell frame body B arranged at the lower portion, and an upper bearing bush A and a lower bearing bush B are arranged on the inner side of the bearing shell frame; an oil groove is formed in the middle of the bearing bush B, and shaft supporting faces are arranged on the inner sides of the bearing bushes; each shaft supporting face is composed of a plurality of graphite linings and a plurality of alloy linings, the graphite linings and the alloy linings are connected in a staggered manner, and gaps are arranged between the graphite linings and the alloy linings; and two corresponding sealing covers are arranged on the outer side below the bearing shell frame. The intermediate bearing for the ship has the beneficial effects that the bearing capability is high, certain self-lubrication performance is achieved, and the intermediate bearing can adapt to the low rotating speed of the intermediate bearing.

Description

technical field [0001] The invention relates to a marine mechanical component, in particular to a marine intermediate bearing. Background technique [0002] In recent years, the trend of large-scale ships has become increasingly significant, and the power of main engines has also increased accordingly. For example, the power of main engines used on ultra-large container ships has reached 60,000 to 100,000 kilowatts, which has greatly increased the shaft diameter of ship propulsion shafting; On the one hand, in order to obtain high efficiency of the propeller, the speed of the propeller is getting lower and lower, the diameter of the blade tends to increase, and the weight of the corresponding propeller tends to become heavier, which also leads to an increase in the shaft diameter of the propulsion shafting system, all of which make the shaft The weight increases with the increase of the shaft diameter, which requires a corresponding increase in the bearing capacity of the be...

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Problems solved by technology

[0003] At present, the common structure of the intermediate bearing used to support the intermediate shaft in my country's shipbuilding industry is roughly divided into two types, the spherical self-aligning intermediate bearing with the function of automatically compensating the axis offset and the sliding intermediate bearing. The manufacturing process of the former is complicated, The requirements are high and the cost is also high. The manufacturing process and requirements of the latter are simpler than the former, and the cost is much lower. At present, most of the ships use sliding type intermediate bearings. In order to be able to support the middle of the large shaft diameter There is a layer of Babbitt alloy (also known as white metal) lining on the inner wall of the bearing bush. Babbitt alloy has the characteristics of high temperature resistance and good wear resistance. Generally, it can support the intermediate shaft with large shaft diameter, but in When the speed of the intermediate shaft is slow, the lubricity of the intermediate bearing is not very good, and the phenomenon of "lava" is prone to occur, which affects the application of this intermediate bearing on large ships

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