2500字的英文文章
Abstract
This paper introduces the basic type, size, parameters and performance curves of GB3235-82 fan. First, the basic type and structure of the fan are introduced. Secondly, the size and parameter range of the fan are given, and the selection of impeller type is mentioned. Finally, the performance curve of the fan is analyzed.
1 Introduction
GB3235-82 Fan is a kind of fan which is commonly used in industrial and civil fields. It is widely used in ventilation, ventilation and air conditioning of industrial and civil buildings, machinery, transportation and other places. The fan has reasonable structure, good performance, safe and reliable operation, and convenient installation and maintenance. It is widely used in air supply, air exhaust, air circulation and air conditioning systems.
2 Basic type and structure
GB3235-82 Fans use centrifugal impeller type, including forward blade centrifugal impeller, backward blade centrifugal impeller and backward blade oblique angle centrifugal impeller. The fan casing is mainly composed of a housing, an impeller, a guard plate, a bearing box and an adjustable casing, etc. The connection between each part is connected by a flange. The guard plate can protect the impeller and the bearing, and also balance the pressure at both ends in the housing.
3 Size and parameters
The size and parameters range of GB3235-82 Fan is vast. The entrance and exit sections of the fan are mostly corresponding directly linking flange, and it can also be connected by elbow. The connection size is diameter 250mm-3000mm, and the outlet angle is in the range of 0-45 degrees. As for the fan impeller type, it is commonly used in centrifugal forward blade, centrifugal forward blade and centrifugal reverse inclined blade. Moreover, the speed could be 4-4800rpm, and the air volume could be 0.2-5700 cubic meters per hour.
4 Performance curve
The performance curve of GB3235-82 fan is a graph display of the relationship between the wind volume and the wind pressure generated by the fan. The performance curve of the fan shows the wind pressure generated on the left and the wind volume produced on the top. Along the characteristic curve of the fan, the specific power can be determined by the air volume and pressure at different points.
5 Conclusion
This paper mainly introduces the basic type, size, parameters and performance curves of GB3235-82 fan. To use the fan correctly, it is necessary to select an appropriate fan size, impeller type and speed according to the actual use conditions. Additionally, an accurate performance curve of the GB3235-82 fan will also be needed in order to guide the engineering practical design.
It is hoped that, by reading this paper, people can better understand the basic type, size, parameters, and performance curves of GB3235-82 fan, and make more reasonable and economical selection and design.
