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Guilin Hongcheng Electromechanical Equipment Co., Ltd
G/Y4-73F boiler centrifugal induced draft fan
NegotiableUpdate on 05/02
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Overview
The G/Y4-73F boiler centrifugal draft fan is designed to support 100-200MW thermal power generation units.
Product Details
The centrifugal induced draft fan of G/Y4-73 boiler is based on the original G4-73-11 and Y4-73-11No. (20-29 1/2,) D, and has been redesigned according to the problems that have existed in production and use for more than 20 yearsA newly designed product. Compared with the original series, the following major improvements have been made in the design:;
The transmission mode of the original fan cantilever support (D type) has been changed to the transmission mode of the intermediate support (F type), which improves the stability of the fan during operation; Especially for induced draft fans, the wear and dust accumulation of the impeller can affect the balance of the rotor and easily cause fan vibration. This improvement is particularly important.
Through model testing (impeller outer diameter D-1000mm), an intake chamber suitable for this fan has been added. Change the shape of the original air inlet to an eccentric air inlet. In the past, fan manufacturers did not manufacture additional air inlet chambers, and the air inlet chambers configured by each power plant were often not suitable for the operation of the fan, which could easily cause intake vortices and cause severe vibrations in the fan casing, air inlet chamber, and air duct. The fan's operation deteriorated severely, with large fluctuations in air volume, pressure, and power, making the equipment unable to operate normally. The use of this new series of fans can satisfactorily solve this problem.
There are 5 wing shaped blade regulating dampers installed at the inlet of the intake chamber to adjust the characteristics of the fan and improve its regulation efficiency. Rolling bearings are installed at the support of the regulating blades for flexible rotation and reliable use.
Due to the high ambient temperature of most air supply fans, the bearings are prone to heating up. Therefore, the bearing box of the new series of fans is also water-cooled, just like the induced draft fan.
The bearing box of the fresh air fan has improved the shaft seal design and added a vent plug to solve the oil leakage problem.
Due to the change in the standard of rolling bearings, the model of rolling bearings used in the fresh air fan has been adjusted. At the same time, due to the change in transmission mode and the more reasonable force situation of bearings, the problems of rolling bearings in use have been greatly reduced.
