What Are The Types Of Fan Impeller?

Impeller is the heart of centrifugal fan.  Different working conditions have different requirements for impeller forms of centrifugal fans.  According to the blade Angle of impeller outlet, it can be divided into three types: forward type, radial type and backward type.   Forward type blade, blade outlet Angle β2 > 90 °, the export of wind pressure is higher, but the efficiency is low, the forward type blade easily gathered impurities between the impellers, easy fouling, used for air flow, but requires higher area, wide application, blade generally narrower, quantity, type common to fan model has 9-10 series, 9-08 series high pressure fan.     Radial blade: the outlet Angle of the blade β2=90°, it has simple structure, low production cost, parameters between the forward type and the back type, low efficiency, because of its characteristics of not easy to scale, it is more used in the mine and heavy dust conditions.  Backward blade: blade outlet Angle β2<90°, it has large air volume, low pressure, but high efficiency, can reach 80%-90%, so it is widely used, and because of its characteristics of not easy to scale, in power plant, metallurgy, chemical industry, building materials and other fields is very widely used.

Pakistan centrifugal fan delivery site

Pakistan centrifugal fan delivery site   Recently, a batch of centrifugal fans used in the biomass boiler system of a sugar plant in Pakistan have been sent to the port after strict inspections.   There are a total of 8 fans , including 2 primary fans, secondary fans, 2 air fans and induced draft fans. Most of these centrifugal fans are coupling driven , which are large flow, low noise, high efficiency, stable and reliable operation, fully meet the needs of users.   SIMO Blower’s industrial centrifugal fans can be widely used in various industrial systems, such as power generation, metallurgy, cement production, chemical industry , waste incineration systems, Industrial boiler systems, etc.   Choose SIMO Blower, we will serve you wholeheartedly. https://www.youtube.com/embed/p37lTkjKle8

What are the types of fan impellers?

What are the types of fan impellers? The impeller is the core component of the fan, which directly determines the overall performance, safety and reliability of the fan. Our company implements strict quality management throughout the whole process from raw materials entering the factory to finished products leaving the factory. The main process is as follows. 1. Purchase: According to the design requirements, select the designated grades of national standard steel materials with a material guarantee, and enter the material inspection procedure after passing the size and macro inspection. Each batch of steel is sampled and inspected, and the material composition is confirmed to be qualified, and then transferred to the blanking procedure. 2. Cutting, forming, welding: The front disc, rear disc, middle disc and blades of the impeller are all cut with CNC laser to ensure the accuracy of the profile and reduce thermal deformation during cutting. After passing the dimensional inspection, transfer to the forming procedure. The front disc, rear disc, and middle disc parts of the impeller are all pressed into a 1000t cantilever press with special molds. After passing the inspection of the shape line model, they are transferred to the welding procedure. Welding adopts a combination of carbon dioxide gas shielded welding and manual arc welding. The preheating of the workpiece and the preheating of the electrode are carried out in accordance with the national standard. When welding, the front disc, rear disc, middle disc, blade and other parts of the impeller are scribed, spot welded, spliced, leveled, carbon arc gouging (grooving), pressure group welding, conformal, riveting, Then the outer circle of the impeller is processed on the vertical lathe. After completion, the radial runout and end runout of the impeller are inspected, 100% size inspection, 100% weld inspection, and then transferred to the stress relief program. 3. Stress relief: The impellers of our company adopt high temperature annealing to relieve stress. Put the impeller into the annealing kiln and heat it to 980℃～1020℃, keep it in the furnace for 2h, then lower the furnace temperature to 720℃～780℃, keep it in the furnace for 1h, then cool down the impeller slowly. After the impeller is annealed, the internal stress is controlled within the allowable range, which ensures the reliable operation of the impeller.   4. Quality inspection: After the stress relief is completed, the chief quality controller will perform 100% shape line inspection, 100% size inspection, 100% weld height inspection, weld ultrasonic or color flaw detection, and runout inspection. After all the inspections are qualified, transfer to the balance procedure. 5. Balance: According to the weight of the impeller, select 40T, 20T, 10T, 5T dynamic balance test machines to carry out static and dynamic balance experiments, and accept them according to JB/T 9101-1999 "Ventilator Rotor Balance". 6. Painting: Perform surface treatment and painting according to JB/T 6886—95 "Technical Conditions for Coating of Fans", and can be put into storage after passing the appearance inspection. SIMO Blower specializes in producing centrifugal fans for 65 years, with sophisticated equipment and mature technology. In order to ensure the quality of each fan, SIMO Blower has a dynamic balance accuracy of less than 4.0mm/s, and strives for perfection in each process to meet the high standards of the fan industry.  

Noise Countermeasures for Boiler Fan

Noise Countermeasures for Boiler Fan Currently in many enterprises, industrial production and heating are required, the boiler centrifugal fan is very popular. However, due to many factors, draft fan noise affect residents work, life, damage people's health. Thus industrial boiler fan noise control should not be delayed.  Noise Countermeasures: Combined of Fan Noise Reduction and Energy Efficiency    Generally, boiler room blower and induced draft fan noise is 90 decibels.Transported boiler flue gas temperature can up to 180 ℃.Applying of closed insulation leads to poor heat dissipation, motor temperature is too high, even burning motor.Thus, the process will be combined the fan noise reduction and energy efficiency.   After practiced, energy-saving boiler fan noise comprehensive management plan can be: boiler room process layout remains unchanged. The blower and fan disposed in the interior noise respectively, ventilation pipe is used to connect to the host computer. In the acoustic room or on the top of the wall to open the intake port and install the engine room air intake silencer for use. The blower is close to one side of the boiler room layout, the air inlet on the windward side of the motor in the center of the air flow passage. During boiler operation, the indoor blower noise generated negative pressure then a large amount of fresh outdoor air will automatically enter the soundproof chamber. Firstly, induced draft fan motor heat exchange must be carried out and to make it cool-down and the indoor temperature is around 50 ℃. The program due to acoustic chamber and the inlet muffler noise reduction capabilities than the larger, noise reduction effect is easy to implement. Blower preheated combustion air into the boiler at the same time achieve energy recycling and gain certain economic benefits.