Axial flow cooling blower fan

Abstract

This invention discloses an axial cooling blower with large diameter of 8-10m, low pressure head of 70-130Pa and high blast volume of 440-550m3 / s composed of a motor, a bustle pipe, a deflector vane component and a blade component, in which the outer circle of the deflector vane component is connected with one end of the bustle pipe, the vane component is assembled in the pipe, the output shaft of the motor passes through the inner circle of the deflector vane and connects to the rim of the vane, which applies a theory of free vortex blade lattice, applies low Renault number and high lift aerofoil and increases torsion angle of the vane to increase chord length of the tine to manufacture a new type of blower and installs a deflector vane to recover rotation energy of the outlet and increase hydrostatic lifting of the blower so as to increase speed of the output of an air cooler.

Description

technical field [0001] The invention relates to an axial flow cooling fan, which has a large diameter of 8-10m, a low-pressure head of 70-130Pa, and a high air volume of 440-550m 3 / s. Background technique [0002] Since large axial flow fans play an important role in forced convection heat transfer in direct air cooling systems of thermal power plants, the performance of the fans directly determines the cooling effect of the air-cooled condenser. Since the air-cooled condenser requires a large air volume during the heat dissipation process, but the pressure head is not large, the fan of the air-cooling system often adopts an axial flow fan with a low head, large air volume, and low noise. However, in the hot summer season, the ambient temperature is very high, especially when the natural wind blows from the side of the boiler room and forms heat backflow under the air cooling tower, the air volume blown by the existing fan cannot meet the actual high temperature condition ...

AI Technical Summary

Problems solved by technology

However, in the hot summer season, the ambient temperature is very high, especially when the natural wind blows from the side of the boiler room and forms heat backflow under the air cooling tower, the air volume blown by the existing fan cannot meet the actual high temperature condition of the air-cooled condenser The heat dissipation requirements of the air-cooled condenser seriously affect the heat dissipation effect of the air-cooled condenser, and even cause the shutdown of the system, which has a great impact on the safe production and operation of the power plant and caused huge economic losses.

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