1600C

NegotiableUpdate on 02/01

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Overview

Dehui special fan material carbon steel model 2.8-20 speed 500-2900 power 2.2-400 low noise No.10 prototype dimensionless performance table and curve

Product Details

Dehui special fan

The dimensionless performance table and curve of Prototype No. 10. Calculate the dimensional performance of fan No.10 or above based on the provided dimensionless performance table or curve. When the reserve coefficient of the motor is in a non-standard state, convert the performance of the non-standard state to the performance of the standard state, and then select the fan based on the conversion performance. The conversion formula is as follows: Q0/Q=n0/n?? (m3/h)P0/P=(n0/n)2(ρ0/ρ)(Kp/Kp0)?? (Pa)Nin0/Nin=(n0/n)2(ρ0/ρ)??? (kw) η in0=η in, where: η in - internal power n - rotational speed (r/min)

Before installation: A comprehensive inspection of all components of the fan should be carried out to ensure that the parts are complete, the rotation direction of the impeller and the casing is consistent, and the connections between each part are tight. Whether the main components such as impeller, main shaft, bearings are damaged, and whether the transmission system is flexible. During installation: Pay attention to checking the casing, and there should be no tools or debris falling into the casing. To prevent rust and reduce disassembly difficulties on some joint surfaces, a layer of lubricating grease or mechanical oil should be applied. The fan is fully connected to the foundation structure, and the inlet and outlet air ducts should be adjusted to fit naturally. Forced connections are not allowed, and the weight of the ducts should not be added to the various components of the fan. Attention should be paid to the horizontal position of the fan. Installation requirements: (1) Install according to the position and size shown. To ensure accuracy, special attention should be paid to the axial and radial clearance dimensions between the inlet and outlet and the impeller. (2) After installation, test the transmission assembly and check for any tightness or collision with the fixed parts. (3) After all installations are completed and the overall inspection is qualified, the fan can be put into trial operation. To prevent motor overload and burnout, when starting the fan, * * should be carried out with no load (close the inlet valve and slightly open the outlet valve). If the situation is good, gradually open the valve until the specified working conditions are met. During operation, the current should be strictly controlled and not exceed the rated value.

2. Form

1) The fan is single suction. There are four machine numbers: 6.8, 7.1, 7.4, and 8.1.

2) This fan can be made into two types: clockwise rotation or counterclockwise rotation: when viewed from one end of the motor, if the impeller rotates clockwise, it is called a clockwise rotating fan, represented by "clockwise"; Rotate counterclockwise, known as counterclockwise rotating fan, represented by "counterclockwise".

3) The outlet position of the fan is represented by the outlet angle of the casing, and both "forward" and "reverse" can be made at 0 degrees, 90 degrees, and 180 degrees, a total of three angles.

4) The transmission mode of the fan is D-type, and it is made into a whole structure, which is easy to install.

3. Structural characteristics

The fan is composed of an impeller, a casing, an air inlet, a transmission group, an integral bracket, etc.

1) There are 14 long and 14 short blades on the impeller, all of which are forward curved blades. After the impeller is formed, it undergoes static and dynamic balance correction, resulting in smooth operation.

2) The casing is welded with ordinary steel plates to form a snail shaped whole

We are familiar with high-pressure fans and high-pressure blowers, and we also understand their differences. But what about high-pressure? What are the differences between it and high-pressure fans? This question is easy to answer, just learn more about high-pressure centrifugal fans and compare them.

High pressure centrifugal fan is also a device that converts kinetic energy into potential energy. It uses a high-speed rotating impeller to act on gas and complete the entire operation process. Compared with high-pressure fans, there is a difference in the structure, which is the difference in the impeller of the fan. We all know that high-pressure fans use annular impellers, while high-pressure centrifugal fans are the impellers of centrifugal fans.

Secondly, there is also a difference in pressure between the two. It is obvious that the pressure of a high-pressure fan is much higher than that of a high-pressure centrifugal fan, but the flow rate of a high-pressure centrifugal fan is much larger than that of a high-pressure fan, which is a very special feature. The difference lies in the practical application. As high-pressure fans cannot pass materials through the fan, they are only suitable for gas transportation in various industries; However, high-pressure centrifugal fans can handle materials, so they can be used for ventilation, dust removal, and other purposes.