It is the fixed part
in a centrifugal compressor and along with each impeller they form the compression stages. This made up of a diffuser, an elbow of return, return guides vane. Diffuser, gathers the flow of gas that leaves the impeller without energy transfer, the radial diffuser is a stationary component waters under the impeller, whose main function is the one when coming out to reduce the high speed of the gas flow of the impeller, with a minimum of lost, to turn to the maximum possible the pitot pressure into additional static pressure. In the diffuser, energy is not given to the fluid; the Diffuser without vanes, the radial component of the speed of the fluid is reduced based on the increase
of areas, where as the tangential component of the speed is reduced based on the differential of the diameter of the impeller and the one of the diffuser to maintain constant the angular momentum. Usually the value of the width of the channel is 0,9 to 0,75 of the width of the end of the impeller, Return guides vanes give the correct angle of entrance to the gas towards the following impeller. Inlet guides vanes are those in charge of gets appropriate direction to inlet gas flow of the scroll of entrance with a very low speed towards the first impeller.
in a centrifugal compressor and along with each impeller they form the compression stages. This made up of a diffuser, an elbow of return, return guides vane. Diffuser, gathers the flow of gas that leaves the impeller without energy transfer, the radial diffuser is a stationary component waters under the impeller, whose main function is the one when coming out to reduce the high speed of the gas flow of the impeller, with a minimum of lost, to turn to the maximum possible the pitot pressure into additional static pressure. In the diffuser, energy is not given to the fluid; the Diffuser without vanes, the radial component of the speed of the fluid is reduced based on the increase
of areas, where as the tangential component of the speed is reduced based on the differential of the diameter of the impeller and the one of the diffuser to maintain constant the angular momentum. Usually the value of the width of the channel is 0,9 to 0,75 of the width of the end of the impeller, Return guides vanes give the correct angle of entrance to the gas towards the following impeller. Inlet guides vanes are those in charge of gets appropriate direction to inlet gas flow of the scroll of entrance with a very low speed towards the first impeller. Radial bearings
They’re of the tilted type and segmented (tilted-pad) with the purpose of to prevent oil wheel at any speed of operation, the material of the shoe is of steel with a bimetallic surface (generally babbit), are self-aligning axial as much radial, distributing uniformly the load on the cushion, the bearings can be removed without removing the rotor from casing.
Axial bearings
Axial bearings
They are of the tilted type and segmented (tilted-pad) of double action and support the axial loads in both directions, sometimes the balance piston does not manage to compensate the axial forces reason why these bearings act. The material of the shoe is of steel with a surface of babbit and is fixed firmly to the porthole bearings.
Magnetic bearings
A variant that this taking great height at worldwide is the use of the magnetic bearings in replacement of before mentioned. Its advantage is that physical contact between the axis and the bearings does not exist
Magnetic bearings
A variant that this taking great height at worldwide is the use of the magnetic bearings in replacement of before mentioned. Its advantage is that physical contact between the axis and the bearings does not exist
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