Transformer Low Noise Axial Flow Fan

This axial flow fan is designed to provide a 9Q series transformer axial flow fan with large flow and full pressure, of which 9 means the fan impeller diameter is 900 mm, and Q means the fan is front blow type.

Product Details

Transformer Low Noise Axial Flow Fan 



Product Overview

  The transformer axial flow fan is an important part of the large and medium power transformer cooling system. It is generally required to have better performance, that is, the flow rate is large, the total pressure is high, and the noise is small. The structure of the axial flow fan is relatively simple. It is generally composed of motor, impeller, bracket, casing and protective cover. However, the structure and shape of the impeller, especially the shape of the blade, vary a lot. The aerodynamic performance also plays a decisive role. The traditional axial flow fan design method includes the isolated blade design method with the aerodynamic performance of the original blade and the cascade design method based on the binary cascade theory. Some of the standards based on the 1990s The ternary flow of the blade modeling method. The ventilator blades designed by the above method are relatively flat blades, and although the process is simple, the performance is poor. A small number of twisted blades are mostly superposed by plane cascades, rather than true twisted blades based on full three-dimensional design, which also affects the performance of the fan, so it is difficult to reach the flow of the transformer shaft flow fan. The requirement of high pressure.

  This axial flow fan is designed to provide a 9Q series transformer axial flow fan with large flow and full pressure, of which 9 means the fan impeller diameter is 900 mm, and Q means the fan is front blow type.

  The 9Q series transformer axial flow fan of the invention has the overall structural form consisting of a motor, an impeller, a shroud, a bracket, a casing and a protective cover. The utility model is characterized in that the motor is located at the inlet end of the fan, the motor shaft is connected with the impeller, the impeller is driven to rotate, the motor is supported by the bracket, and the shroud is sleeved on the outside, and the shroud is located at the inlet end of the fan, which is a hollow conical cylinder, the bottom The diameter of the end face is equal to the diameter of the hub. The casing is cylindrical with a diameter of 910 mm. It has a flared shape at the inlet end to allow the airflow to smoothly enter the flow path of the fan. There is a protective cover on the end face of the fan. To prevent debris from entering the fan runner and the blade colliding.

  The fan blades are specially designed. Parabolic theory and unequal work principle are adopted in the design process. The flow pattern and flow surface of the blade are fully three-dimensionally designed. The obtained blade is a three-dimensional twisted blade, which is characterized by blades. The unequal thickness, the continuous smooth surface, and any intersecting surface and the profile are cut, and the intersecting lines are in the shape of a streamlined airfoil, so that the invention has excellent aerodynamic performance.

  In the overall structure of the fan, a shroud portion is added, and the shroud is located at the inlet end of the fan and is sleeved outside the motor, so that the airflow smoothly enters the flow path of the fan, thereby improving the inlet of the fan impeller The suction of the end allows the ventilator to maximize efficiency.

  The beneficial effect of the fan is that the blade is a three-dimensional twisted blade, characterized in that the profile is continuous and smooth, and the outer cover is covered with a shroud, so that the airflow smoothly enters the flow passage of the fan, so the 9Q series transformer axial flow fan has Excellent aerodynamic performance, large flow, high total pressure, low noise, low energy consumption, stable operation, flat performance curve and wide application range.


Product Structure


Transformer Low Noise Axial Flow Fan1

Figure 1

  In the figure 1: Motor-1, Motor Shaft-2, Impeller-3, Bracket-4, Shroud-5, Case-6, Shield-7

  Figure 1 shows the overall structure of the fan, the airflow direction is from left to right. The motor 1 is located at the inlet end of the fan, and the motor shaft 2 is connected to the impeller 3 to drive the impeller 3 to rotate. The motor 1 is supported by a bracket 4, and has a shroud 5 on the outside. The shroud 5 is a hollow conical cylinder having a taper of 13° and a length of 236 mm. The diameter of the bottom end face is equal to the diameter of the hub. The casing 6 has a cylindrical shape of 910 mm in diameter and has a flared shape at the inlet end to allow the airflow to smoothly enter the flow path of the fan. A protective cover 7 is designed on the end face of the inlet end of the fan to prevent debris from entering the fan runner and the blade.




Best regards

Mandy

Email:mandy@erg.cn



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