All welded steel structured bearing seat of blower fan water-cooling type in large-scale power station, and manufacturing method thereof

Abstract

The invention discloses a fan water-cooled bearing base of the large power station with full steel welded structure and its manufacturing method. It is characterized in that it adopts the Q235A swage with good welding capability to process the separating parts and assembly the parts, adopts CO2 to protectively weld to form the upper cover and the base of the bearing base. The bearing base has cooling water channel, the lubrication oil tank and the temperature detecting channel; the raw metal roughing after the annealing, and anneal again after the roughing, metal refine and the cooling water channel and the lubricating oil channel detect the water pressure.

Description

technical field [0001] The invention relates to a fan used in a large power station, in particular to a bearing seat of the fan and a manufacturing method thereof. Background technique [0002] The fan used in a large power station is an important equipment that runs continuously for a long time. When the fan is working, the reaction force generated when the rotor shaft of the main engine transmits torque acts on the bearing. The bearing seat is the base that carries the main shaft. It is required that the bearing seat must have sufficient rigidity, therefore, the existing fan bearing seat is made of cast iron. But on the other hand, due to the compression of the air during the work of the fan, the temperature of the casing is generally above 80°C, and it can reach about 100°C in summer. Therefore, a cooling device must be installed in the bearing seat; at the same time, because the bearing needs lubrication, the seat A lubricating device must also be provided inside, which...

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Problems solved by technology

But on the other hand, due to the compression of the air during the work of the fan, the temperature of the casing is generally above 80°C, and it can reach about 100°C in summer. Therefore, a cooling device must be installed in the bearing seat; at the same time, because the bearing needs lubrication, the seat A lubricating device must also be installed inside, which makes the structure of the bearing seat very complicated

There are two types of fans, one is an ordinary fan supported at both ends of the rotating shaft, and the other is a cantilever fan supported only at one end of the rotating shaft. The cooling device, the structure of the bearing housing is more complicated

Therefore, the casting process of the bearing seat is very difficult and cumbersome, casting defects are difficult to avoid, the quality cannot be guaranteed, and the pass rate of the blank has been low (about 50%), resulting in high product costs, low economic benefits, and sometimes delayed delivery period, seriously affecting the reputation of the enterprise

[0003] It can be seen that sufficient rigidity and complex structure have become a pair of contradictions that are not easy to handle in the design of bearing housings.

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