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Axial-flow ventilating machine for transformer

A technology for axial flow fans and transformers, applied in axial flow pumps, transformer/inductor cooling, machines/engines, etc., can solve problems such as difficulty in achieving transformer axial flow, affecting fan performance, and large fan flow. Achieve excellent aerodynamic performance, wide application range and flat performance curve

Inactive Publication Date: 2007-01-03
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the fan blades designed by the above method are plane blades. Although the process is simple, the performance is poor.
A small number of twisted blades are mostly superimposed by plane cascades, rather than real twisted blades based on full three-dimensional modeling design, which also affects the performance of the fan. high pressure requirements

Method used

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  • Axial-flow ventilating machine for transformer
  • Axial-flow ventilating machine for transformer
  • Axial-flow ventilating machine for transformer

Examples

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Embodiment Construction

[0018] figure 1 Shown is a schematic diagram of the overall structure of the preferred embodiment 1 of the present invention, and 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 with the impeller 3 to drive the impeller 3 to rotate. Motor 1 is supported by support 4, and the outside is covered with shroud 5, and shroud 5 is a hollow conical cylinder, and the taper of cone is 13 °, and length is 236 millimeters, and the diameter of bottom surface is equal to the diameter of wheel hub. The casing 6 is cylindrical with a diameter of 910 mm, and is slightly bell-shaped at the inlet end, so that the airflow can smoothly enter the flow channel of the fan. A protective cover 7 is designed on the face of the inlet end of the fan to prevent debris from entering the fan flow path and impacting the blades.

[0019] figure 2 , 3 Shown are a side view and a front view of the partial structure of the im...

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Abstract

The invention relates to a 9Q series transformer axial flow air machine that is made up of motor, fan, fairwater, support brackets, crust and shield. Its feature is that the motor is located at the entrance of the motor, and the motor axis is connected to the fan, driving the fan to rotate. The support brackets supports the motor and a fairwater is covered outside. The fairwater if a hollow taper barrel whose diameter of the bottom is the same as that of the nave. The shield is set on the entrance end face of the air machine. And the fan is three-dimensional distortion fan. It has the advantage of low noise, high flux and low power consumption.

Description

Technical field [0001] The invention relates to a transformer axial flow fan, which is mainly used for cooling systems of large and medium-sized power transformers. Background technique [0002] Transformer axial fan is an important part of the cooling system of large and medium-sized power transformers. It is generally required to have better performance, that is, large flow, high total pressure and low noise. The structural form of the axial flow fan is relatively simple, generally composed of several parts such as a motor, an impeller, a bracket, a casing and a protective cover, but the structure and shape of the impeller, especially the shape of the blades, vary a lot. The aerodynamic performance also plays a decisive role. The traditional axial flow fan design methods include the isolated blade design method based on the airfoil with good aerodynamic performance as the original blade shape and the cascade design method based on the binary cascade theory. Three-dimens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/08F04D3/00
Inventor 邵雪明魏民黎贤钛
Owner ZHEJIANG UNIV
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