Common Blower Types used in industrial purpuse

Blowers can achieve much higher pressures than fans, as high as 1.20 kg/cm2. They are also
used to produce negative pressures for industrial vacuum systems. Major types are: centrifugal
blower and positive-displacement blower. Centrifugal blowers look more like centrifugal pumps than fans. The impeller is typicallygear-driven and rotates as fast as 15,000 rpm. In

Types of centrifugal fan

Centrifugal FanTypes
The major types of centrifugal fan are: radial, forward curved and backward curved .
Radial fans are industrial workhorses because of their high static pressures (up to 1400 mmWC ) and ability to handle
heavily contaminated air streams. Because of their simple design,radial fans are well suited for high temperatures and medium blade tip speeds.

Fan and blower selection

Fan and blower selection depends on the volume flow rate, pressure, type of material handled, space limitations, and efficiency. Fan efficiencies differ from design to design and also by types. Typical ranges of fan efficiencies are given in Table 5.2. Fans fall into two general categories: centrifugal

Introduction Fans and blowers used in industrial process

Fans and blowers provide air for ventilation and industrial process requirements. Fans generate a pressure to move air (or gases) against a resistance caused by ducts, dampers, or other components in a fan system. The fan rotor receives energy from a rotating shaft and transmits it to the air

Basic terms of mechanical engg. 3

Supercharging:
Actually, power output of engine depends on what amount of air enter into the engine through intake manifold. Amount of entry aiy if increased, then must be engine speed will increased. Amount of air will be increased by increasing inlet air density. The process of increasing inlet air density is supercharging. The device which is used for supercharging is called supercharger.Superchargeris driven by a belt from engine crakshaft. It is installed in intake system.

Basic terms of mechanical engg. 2

Mach Number:
It is the ratio of the velocity of fluid to the velocity of sound.
M=1 ----------------- Sonic flow
M> (1-6) ----------- Super-Sonic flow
M>6 ---------------- Hyper-Sonic flow

Fluid discharge/Fluid flow:Quantity of fluid flowing per second.

(through a section of pipe/ through a section of channel)

Q=AV

where, V= velocity of fluid,A= cross-sectional area of pipe/channel
Note: 1m³ = 1000 L1 cusec = 1 ft³/sec1 ft = 0.3048 m

Basic terms for Mechanical Engineering 1

Torque or Turning Force:
It is the total amount of force which is required to create acceleration on moving substance.

Couple:Two forces those acts on equally,parallely & oppositely on two separate points of same material.

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