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Blower may refer to:
- Air blowers generally use centrifugal force to propel air forward.Inside a centrifugal air blower is a wheel with small blades on the circumference and a casing to direct the flow of air into the center of the wheel and out toward the edge.The design of the blades will affect how the air is propelled and how efficient the air blower is. Blade designs in air blowers are classified as forward-curved, backward-inclined, backward-curved, radial and airfoil.
- Forward-Curved Air Blowers
Forward-curved blowers are impulse devices with blades that are curved in the direction of rotation. The blower accelerates air to a high velocity while rotating at a low speed. Forward-curved blower wheels spin at relatively low speeds and produce high volumes of air at low static pressures. This type of blower is incapable of operating at the speeds necessary to create high static pressures because of its lightweight construction. Still, forward-curved blowers are the most common type of air blower because they propel the most air volume in relation to blower size and speed.
- Backward-Inclined and Backward-Curved Air Blowers:
A backward-inclined blower, operating at roughly twice the speed of a forward-curved air blower, has flat blades that slant away from the direction of travel. This type of blower is highly efficient (low horsepower requirement) and has a rugged construction suitable for high static pressure applications. This type of air blower is best used in locations where the air is either clean or mildly contaminated. Similar to this style is a backward-curved air blower. The blades of a backward-curved blower are a single thickness throughout and curve away from the direction of travel. These blades are sturdier than backward-inclined blades and can be used in corrosive and erosive environments.
- Radial Air Blowers:
Radial blowers are designed for industrial use in small exhaust systems. These air blowers are capable of handling air that contains bits of dirt, grit, lint and other foreign particles while still maintaining a high-pressure supply of air for conveying and cooling. Their use in particle-laden air means that this type of blower is generally designed to be self-cleaning. Radial air blowers have the lowest efficiency levels because the blades have no curve or lean and are perpendicular to the wheel's rotation. Think of a paddleboat racing a boat with an outboard motor. No matter how fast the paddle spins, it will not catch up to the boat with the outboard motor.
- Airfoil Air Blowers:
Airfoil blowers have the most efficient design of all air blowers. Their blades have an airfoil shape that is wide at the center and curves down to narrow edges. Airfoil blowers are extremely efficient because they require lower horsepower levels to operate. This type of blower is used in clean air situations.
- Types of blowers
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. The centrifugal blower and the positive displacement blower are two main types of blowers, which are described below. 1.Centrifugal blowers: Centrifugal blowers look more like centrifugal pumps than fans. The impeller is typically gear-driven and rotates as fast as 15,000 rpm. In multi-stage blowers, air is accelerated as it passes through each impeller. In single-stage blower, air does not take many turns, and hence it is more efficient. Centrifugal blowers typically operate against pressures of 0.35 to 0.70 kg/cm2 , but can achieve higher pressures. One characteristic is that airflow tends to drop drastically as system pressure increases, which can be a disadvantage in material conveying systems that depend on a steady air volume. Because of this, they are most often used in applications that are not prone to clogging. 2.Positive-displacement blowers : Positive displacement blowers have rotors, which "trap" air and push it through housing. These blowers provide a constant volume of air even if the system pressure varies. They are especially suitable for applications prone to clogging, since they can produce enough pressure (typically up to 1.25 kg/cm2) to blow clogged materials free. They turn much slower than centrifugal blowers (e.g. 3,600 rpm) and are often belt driven to facilitate speed changes.
- USS Blower (SS-325), a submarine of the United States Navy
- a ducted centrifugal fan, especially when used in a heating, ventilating, and air-conditioning system
- a supercharger on an internal-combustion engine
- a device to increase the draught of a locomotive (see blastpipe)
- the telephone, for which the blower is a slang term, especially in the United Kingdom. The slang came from the Royal Naval ships prior to telephones. Communication was direct, through a voice pipe. The pipe had a whistle inserted at each end. When a message was to be passed, the caller would remove the whistle at his end, place his mouth into the cavity, sealing it. He would then blow hard. The whistle at the other end would attract the man on watch. He would remove his whistle and call into the pipe. Conversations over, both whistles were replaced.
- Party blower a device for making noises at a party.
- Leaf blower, a gardening tool
- Heterodon platirhinos, a.k.a. the eastern hog-nosed snake, a non-venomous snake found in North America
- Blower (surname)
- Henry Blofeld (born 1939), British sports journalist nicknamed "Blowers"
- a braggart, or loud talker. [Slang] --Bartlett. [1913 Webster]
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