Air compressors of various designs are used widely throughout DOE facilities in numerous applications. Compressed air has numerous uses throughout a facility including the operation of equipment and portable tools. Three types of designs include reciprocating, rotary, and centrifugal air compressors.
The centrifugal compressor, originally
built to handle only large volumes of low
pressure gas and air (maximum of 40
psig), has been developed to enable it to
move large volumes of gas with discharge
pressures up to 3,500 psig. However,
centrifugal compressors are now most
frequently used for medium volume and
medium pressure air delivery. One
advantage of a centrifugal pump is the
smooth discharge of the compressed air.
The centrifugal force utilized by the
centrifugal compressor is the same force
utilized by the centrifugal pump. The air
particles enter the eye of the impeller,
designated D in Figure 6. As the impeller rotates, air is thrown against the casing of the compressor. The air
becomes compressed as more and more air is thrown out to the casing by the impeller blades.
The air is pushed along the path designated A, B, and C in Figure 6. The pressure of the air is increased as it is pushed along this path. Note in Figure 6 that the impeller blades curve forward, which is opposite to the backward curve used in typical centrifugal liquid pumps.
Centrifugal compressors can use a variety of blade orientation including both forward and backward curves as well as other designs.
There may be several stages to a centrifugal air compressor, as in the centrifugal pump, and the result would be the same; a higher pressure would be produced. The air compressor is used to create compressed or high pressure air for a variety of uses.
Some of its uses are pneumatic control devices, pneumatic sensors, pneumatic valve operators, pneumatic motors, and starting air for diesel engines.
Saturday, December 6, 2008
Factors Influencing Alignment procedure 1- Eccentricity (runout) Check · This might be done by a dial gauge 2- Baseplate of machines (soft-f...
Governor Diesel engine speed is controlled solely by the amount of fuel injected into the engine by the injectors. Because a diesel engine ...
Centrifugal Pump Classification by Flow Centrifugal pumps can be classified based on the manner in which fluid flows through the pump. The ...
Pneumatic and hydraulic systems require control valves to direct and regulate the flow of fluid from compressor or pump to the various load ...
Types of control valve There are essentially three type s of control valve; poppet valves , spool valves and rotary valves . Poppet valve...
Principles To provide the necessary alignment between the diesel engine and all mechanically dri-ven components, an understanding of the typ...
ENGINE TURNING TOOL The top bolt in the cover plate of the bore for the engine turning tool is the timing bolt. The timing bolt is us...
DW Brake System (ZDPE/JC-70DB) Training Course Agenda 1- Course Objectives 2- Introduction 3- Hydraulic Pumps and Pressure Regulation 4- P...
Factors Influencing Alignment procedure 1- Eccentricity (runout) Check · This might be done by a dial gage
- ► 2009 (8)
- ▼ Dec 06 (7)
- ▼ December (17)