Zhangjiagang Yuanda Explosion-proof Company supplies (explosion-proof) centrifugal fans

<= . <#><= . d#>-type centrifugal fan can be used for indoor ventilation in general factories and large buildings to transport air and other unnatural gases that are harmless to the human body and non-corrosive to steel. .
- type fan can be used for ventilation of flammable and volatile gases. There is no viscous substance allowed in the gas, and the dust and hard particles contained in the gas are not larger than /. The gas temperature must not exceed ℃.
The performance, optional parts and basic dimensions of the - type fan are consistent with the - type and can be selected according to its sample. The structure of this fan is basically the same as that of the - type - it uses a type motor with a flange and feet. ~, D motor selects the series installation type corresponding to the series in the table.
The - type fan is made of fiberglass and is used to transport corrosive gases. Its performance and basic dimensions are the same as - type. . <#>r Fan Type
When viewed from the motor side, the impeller rotating clockwise is called a right-hand fan. The impeller is shown on the right. The impeller rotating counterclockwise is called a left-hand fan, which is shown on the left. The outlet position of the fan is expressed by the air outlet angle of the casing. -type fans~are made into various forms when leaving the factory. The user can then install them in the required position according to the requirements. There is no need to indicate this when ordering. The air outlet position adjustment range~interval is. -The air outlet position adjustment range~interval is... ~The air outlet position adjustment range~The interval is. ~The position of the air outlet is made into three fixed and cannot be adjusted. Please indicate when ordering. There are four fan transmission modes: , , and D. - type fans adopt type transmission, D type transmission adopts type transmission.
. <#>r Structural Features
The - type fan is mainly composed of an impeller, casing, air inlet and other parts distributed with a direct-coupled motor. In addition to the above parts, there is also a transmission part.
◆ The impeller is composed of backward-inclined airfoil blades, a curved front disc and a flat rear disc. It is made of steel plate or cast aluminum alloy and has good dynamic and static balance correction for air performance, high efficiency and smooth operation.
. ◆The casing is made into two different types. ~The casing is made as a whole and cannot be disassembled~ The casing is made into a three-open type, except that it is divided into three halves horizontally along the middle and the upper half is divided into two halves vertically along the center line and connected with bolts.
. ◆The air inlet is integrally mounted on the side of the fan and has a curved cross-section parallel to the axial direction, which allows the gas to enter the impeller smoothly with less loss.
. ◆The transmission part consists of the main shaft, the bearing box, the rolling bearing, the pulley or the coupling.
. <#>r Performance and Selection
This sample can only use the dimensionless performance table and curves of the prototype to calculate the dimensioned performance parameters of the above fans.
Table-type prototype dimensionless performance table
The formula for calculating dimensioned parameters from dimensionless parameters:
⑴=d(/)
-Flow rate (/) - Full pressure - required power
-impeller blade outer linear speed (/) -mechanical efficiency
-full pressure compressibility coefficient internal power impeller blade outer edge diameter
-inlet air density (/ ) -Motor reserve coefficient
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