FIELD: machine building.
SUBSTANCE: end gas dynamic seal of shaft of centrifugal compressor includes two stages of noncontact seal the rotating parts of which are fixed on rotor sleeve; at that, on end surface of rotor sleeve there made are blades with an inclination towards rotor rotation direction; at that, each blade has the shape of non-uniform arch with inlet angle of 10 to 40 degrees on outer diameter relative to middle line of the blade profile and tangent to the circle and outlet angle of 70 to 90 degrees on inner diameter relative to middle line of blade profile and tangent to the circle.
EFFECT: improving the reliability and durability of gas dynamic seal.
3 dwg
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