Casting parts structure of electricity generator cast steel shaft bushing and casting method thereof

Abstract

The invention discloses a casting product structure of a steel-cast gap block of an electric generator and a casting method thereof. The steel-cast gap block is a semicircle cylinder with a spherical zone surface, an inner tiling surface and a commissure surface which are respectively positioned on lateral surfaces of the casting product, two end faces of the steel-cast gap block are respectively positioned at the top and the bottom of the casting product, and a shrink head of the casting product is arranged on one end face of the steel-cast gap block that is positioned at the top of the casting product. The casting method comprises the following steps: molding and core making, raw material smelting, pouring, cleaning of the casting product, rough processing of the casting product and stress annealing, wherein, the pouring takes a bottom pouring way, and a pouring gate is positioned on the other end face of the steel-cast gap block. The casting product structure of the steel-cast gap block of the electric generator and the casting method of the invention arrange the shrink head of the casting product on one end face of the steel-cast gap block that is positioned at the top of the casting product, and the spherical zone surface and the inner tiling surface of the steel-cast gap block is positioned on two lateral surfaces of the casting product, thus basically ensuring the casting quality of the two surfaces of the steel-cast gap block.

Description

technical field [0001] The invention relates to a metal casting structure and a casting method, in particular to a casting structure of a generator cast steel bearing bush and a casting method thereof. technical background [0002] The generator bearing bush is a large and thick half-ring split part, generally made of bronze or cast iron, but the shape is not very complicated, because the bearing bush is the key supporting part for the normal operation of the generator, its outer surface has a bearing seat, The surface of the ball belt matched with the bearing cover has a roughness of Ra0.8 and a dimensional accuracy of 0.05mm. The surface of the inner tile needs to be casted with Babbitt alloy. Any casting defects will affect the bonding force between the Babbitt alloy and the bearing body, resulting in peeling and poor bonding. More importantly, during the start-up and shutdown stages of the generator, the bearing pad needs to pump high-pressure oil to prevent the wear of...

AI Technical Summary

Problems solved by technology

Babbitt alloy should be poured on the inner surface of the inner tile. Any casting defects will affect the bonding force between the Babbitt alloy and the bearing body, resulting in shelling and poor bonding.

Images