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The Bearing Has Good Self Position Ability
- Jul 25, 2017 -

Bearing characteristic is (1) the steam turbine high pressure rotor 1〜4 number bearing is the double tilting tile, each three piece can pour the pad, its bearing surface has the Babbitt alloy layer, Bush Bearing the tilting tile supports in the bearing seat, at run time with the direction of the rotor freely swinging to obtain the best oil wedge suitable for each pad; (2) The low pressure rotor 5〜8 bearing of the steam turbine is oval, with high stability du and reliability; (3) The generator rotor 9〜10 bearing is the end cover type bearing, the bearing adopts the Ellipse form. The excitation bearing is provided with double-layer ground insulation to prevent axial-current burn of the axle neck and bearing alloy; (4) The Generator seal tile adopts double loop seal tile, Bush Bearing and the seal tile radial can float with the rotating shaft. (5) The thrust bearing adopts the bevel type thrust bearing, Bush Bearing and the external spherical coordinate is adopted, which has good self position ability.

The bearing is a part of the sliding bearing and the contact of the axle neck, the shape is the half cylindrical surface of the tile like, is very smooth, generally uses the bronze, Bush Bearing antifriction alloy and so on wear-resisting material to make, in the special case, may use the wood, the engineering plastics or the rubber manufacture.

The bearing has two types: integral and split, the integral type is usually called the bushing (bushing). Integral type bearing has oil ditch and oil ditch two kinds. Bush Bearing The bearing and the axle neck adopt the clearance match, the general and does not rotate with the axis.

Sliding bearing work, between the bearing and the hinge is required to have a thin layer of oil film lubrication. If the lubrication is bad, there is direct friction between the bearing and the hinge, the friction will produce very high temperature, although the bearing is made of special high-temperature resistant alloy material, the high temperature produced by the direct friction is still enough to burn it. The bearing may also be caused by excessive load, high temperature, impurity or abnormal viscosity of lubricating oil. Bush Bearing The sliding bearing is damaged after burning the tile.

Thick-walled bush can be cast, in order to improve the friction performance, a layer of bearing alloy (called bearing liner) can be cast on the inner surface of the bearing. All kinds of tenon, groove or thread are often made on the inner surface of the bearing in order to attach the alloy and the bushing well. Bush Bearing Thin-walled bearing can be produced by continuous rolling process of double metal plate.

Powder Metallurgy is a powder-like iron or copper and other basic materials and graphite mixed, and then suppressed sintering forming. Its pore can store lubricating oil, called oil bearing.

The bearing material is usually softer and the inner cylindrical surface is not suitable for grinding, and can be processed by boring, diamond boring, scraping or grinding. Grinding should not be used with the shaft diameter of the method, but should use the special, Bush Bearing size and bearing hole size of the same research stick. Scraping is used for part of the bearing, scraping with a wide blade scraper. When scraping by hand, scratches should be shallow. The inner surface of the complex bearing, should be based on the specific shape of a special boring method.

The material of the bearing is characterized by small friction coefficient, sufficient fatigue strength, good running and good corrosion resistance. The commonly used bushing materials are bearing alloy (Babbitt alloy), copper alloy, powder metallurgy, gray iron and wear-resisting cast iron, etc.