3m Diameter Centrifugal Fan with Large Impeller

• Customization: Available
• Material: Carbon Structural Steel
• Flow Direction: Centrifugal
• Model NO.: 5-10
• Pressure: Low Pressure
• Certification: ISO, CE
• Impeller Diameter: 3000mm
• Blade Type: Backward, Straight, Aerofoil Type
• Impeller Support Method: Single-Suction Cantilever Impeller, Double-Suction
• After-Sales Service Provided: Field Installation, Commissioning and Training
• Warranty: 1 Year
• Transport Package: Steel Pallet Waterproof Cloth Package
• Trademark: SIMO BLOWER
• Origin: Henan, China
• HS Code: 4107960701
• Production Capacity: 300 Set/Sets Per Month Centrifugal Fan
• Package Size: 200.00cm * 200.00cm * 200.00cm
• Package Gross Weight: 300.000kg

Product Description

Product Description

Production Configuration			Centrifugal Fan			Axial Fan		Explanation
			Direct	V-belt	Coupling	Direct	Vee belt
Impeller Group	Material	Q235 Carbon structural steel	√	√	√	√	√	<140ºC and Non-corrosive gas
		Q345 High strength low alloy steel	○	○	○	○	○	<250ºC and Non-corrosive gas
		HG785 High-temperature & High-strength alloyed steel	○	○	○	○	○	<350ºC and Non-corrosive gas
		Stainless steel	○	○	○	○	○	<350ºC or corrosive gas
		Aluminium alloyed	○	○	○	○	○	<60ºC or corrosive gas,impeller diameter<600mm
		Glass fiber reinforced plastics (GRP)	○	○	○	○	○	<40ºC or corrosive gas,impeller diameter<600mm
		Engineering plastics	○	○	○	○	○	<40ºC or corrosive gas,impeller diameter<600mm
	Parts	Blade	√	√	√	√	√
		Impeller cap	√	√	√	Null	Null
		Impeller disc	√	√	√	Null	Null
		Impeller hub	√	√	√	√	√
		Impeller mid disc	×	○	○	Null	Null	impeller diameter>1800mm Large flow fan suitable
	Special Process	Abrasion resistant Low-alloy steel scaleboard	○	○	○	×	×
		Abrasion resistant High hardness alloyed scaleboard	○	○	○	×	×
		Abrasion resistant Ceramic layer	○	○	○	○	○
		Metallikon	○	○	○	○	○	Food grade use applicable

Explanation:
√   Standard
○   Optional 
×   Inapplicable
Null No such component
If you have any needs for fans, please feel free to contact us.

Impeller Process Procedure
The impeller is the main core component of the fan, which directly determines the overall performance and safety and reliability of the fan. Therefore, SIMO BLOWER follows strict quality management standards from the entry of raw materials to the delivery of finished products. The main process of the impeller is introduced as follows:
Purchase of raw materials:

Select national standard steel materials with specified grades and material guarantees according to the requirements of the design engineer. After passing the size and quality inspection, enter the material inspection procedure. Each batch of steel must be sampled and inspected, and after confirming that the material composition is qualified, it will enter the design procedure.

Design:

The fans are all designed using CAD computer-aided design, and the key components are designed using CAPP computer-aided process design, and the key components are calculated by finite element strength. Deformation design and selection are also compared with multiple schemes through corresponding software, and the fan performance is automatically controlled by the computer to test the full performance of the fan. Then enter the blanking procedure.

Cutting:
 

The front disc, rear disc, middle disc and blades of the impeller are all cut by plasma cutting to ensure the accuracy of the shape line and reduce the deformation caused by heat. After passing the size and shape inspection, enter the forming procedure.
The impeller front disc, rear disc, middle disc and other parts are all pressed and formed by a special mold on a 1000t cantilever press. After the shape line sample is inspected and qualified, it will enter the welding process.

Welding:

SIMO BLOWER's welding adopts a combination of carbon dioxide gas shielded welding and manual welding. The preheating of the workpiece and the preheating of the welding rod are carried out in accordance with national standards. During welding, the various parts of the impeller are marked in sequence. Spot welding splicing, welding leveling, group welding and positive riveting. After welding, SIMO BLOWER will perform ultrasonic testing on each weld to ensure that each weld has no gaps. After completion, the impeller radial runout, cross-sectional runout, weld inspection, and size inspection are carried out. After passing the inspection, the stress relief procedure will be entered.

Stress elimination:
 

For high-temperature or large impellers, annealing is used to eliminate stress. The impeller is sent to the annealing kiln and heated to 980~1020ºC. After the annealing furnace is kept warm for a certain period of time, the furnace temperature is reduced to 720~780ºC. After the furnace temperature is maintained for a period of time, the impeller is slowly cooled down. After the impeller is annealed, the internal force is controlled within the allowable range, ensuring the reliable operation of the impeller. For small and medium-sized impellers, vibration aging treatment is used. The principle of applying high-frequency vibration to the impeller through vibration aging facilities is used to accelerate the release and elimination of internal stress in the impeller.

Quality inspection:

After stress elimination is completed, the quality inspection department will conduct shape line inspection, size inspection, weld height inspection, weld ultrasonic or color flaw detection, and runout inspection. After all inspections are qualified, the balancing procedure is transferred.
 

Balance:

According to the dead weight of the impeller, 40 tons, 20 tons, and 10 tons dynamic balancing test machines are selected for dynamic and static balancing experiments. According to the measured balance value, choose to weld the balance block or remove the balance block, and finally make the dynamic balance accuracy reach the highest level 2.5.

Painting:

Different paints are selected according to different working conditions. Xima has anti-corrosion paint for corrosion and high temperature paint for high temperature resistance. According to the customer's choice and the color of the main engine, Xima selects the best color scheme to make the impeller both beautiful and durable.

Assembly → Correction → Welding → Vibration Aging → Rough Machining → Turning → Precision Inspection → Cleaning → Deburring → Balancing → Final Inspection → Painting → Warehousing

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