123ArticleOnline Logo
Welcome to 123ArticleOnline.com!

ALL >> Service >> View Article

Commercial Ventilator, Fan And Blowers

By Author: Susana Terlicki
Total Articles: 31

With few exceptions, the axial blower or fan must not have a lot of back pressure and will work a lot better if the blade is shrouded. One obvious exception is the turbine compressor used in jet engines, but this requires very tight fittings and very high speed so the air is being rammed in against the outgoing air much faster than it can move - it uses a lot of power and makes a lot of noise. Shrouding works better because the greatest loss in an unshrouded fan is the air coming off near the tips and immediately turning out and back circulating only through the fan and not through the room. The most common shrouded fan people see is muffin style fan in computers. An axial blower can have multiple sets of blades and the blades can even over lap so light is not visible through the fan. Fans are used most often for moving large quantities of air between spaces at atmospheric pressure.

Centrifugal blowers come in a number of forms of which the most common is the squirrel cage blower. The common factor is the air is moving perpendicular to the axis of the part that is moving the air. Typically, the air is drawn in through the side of the unit, turns at low speed to encounter the inside of a spinning cylinder with ribs or vanes around the wall of the cylinder which fling the air out and away where it is captured and aimed through an outlet much smaller than the inlet. Think of taking an open tin can, drilling a hole in the center of the bottom to take a bolt as an axle and cutting slots up the sides, bending the material of the slots in, then spinning it with a drill. A variation looks like a plate with ribs running from the center and increasing in height toward the rim, the air being thrown off the rim. The name squirrel cage comes from the appearance like the tread wheel small rodents use for exercise - I suspect it is not called a hamster tread wheel because that is too precise - or childish. Blowers can have higher output pressures, but not a lot higher and they lose capacity rapidly with increasing pressure.

Aside from the small squirrel cage blowers used on some electrical equipment, the most common blowers of this type are the units used for drying carpet after cleaning or a fire, the blowers used for leaf sweeping and the unit hidden inside a vacuum cleaner.

Caution is necessary in selecting blowers for series installation. It is generally accepted that most pre-engineered blowers are capable of withstanding twice their catalog rated static pressure. In other words, where two blowers are installed in series the second blower housing should withstand the higher pressure. There is, however, a need for concern when the combined pressure exceeds twice the rated static pressure for one blower. In series applications involving three or more blowers, or in any system in which positive or negative pressure exists prior to the consideration of the blowers, special housing reinforcement may be necessary.

Additional information can be found at the Fans Mall Company web site http://barryfan.net

Susana Terlicki
Industrial Equipment Engineer
Fans Mall Co.
nis@primus.ca
http://barryfan.net/industrial-blower-fan.html
http://barryfan.net/industrial-fans.html

Total Views: 56Word Count: 549See All articles From Author

Service Articles

1. How To Select Ceramic Tiles And Ceramic Machinery Manufacturers
Author: John Watson

2. A Quick Look At Tamarind Global & Its Corporate Event Solutions
Author: Rohit Tigga

3. All You Should Know About Replacement Of Car Registration
Author: ABA Auto Registration

4. 3 Points That Make “tamarind Global An Undisputed Player Of Global Event Management Industry
Author: Rohit Tigga

5. Painting Contractors, Local Interior Exterior Painters And House Paint - Danbury
Author: Mario Couto

6. Professional Cleaning Services, Cleaning Supplies And Carpet Deep Spring Cleaners - Ca
Author: Daniel Flores

7. Office Cleaning – Let The Professionals To Handle This Big Mission
Author: Cassie Smitty

8. Why Should You Opt For A Professional Furnace Repair Service?
Author: persymargarate

9. Buying The Necessary Garden Supplies To Maintain Your Garden In Good Shape
Author: Huia Moffat

10. Outsource Standard Engineering Services
Author: Shashank Vaidya

11. Best Range Rover Service Center In Dubai
Author: Land Max Auto

12. Inspection Of Shop Front Breakdown And Their Repairing
Author: Grace Smith

13. Shift Your Workplace With The Best Moving Services In Usa
Author: John Brown

14. How To Lessen Extra Luggage During Relocation
Author: Rajesh Kumar

15. Verdek - Your Solution To Scarce Electric Car Charging Stations
Author: Verdek

Login To Account
Login Email:
Password:
Forgot Password?
New User?
Sign Up Newsletter
Email Address: