FIELD: turbo-machines.
SUBSTANCE: invention relates to sealing equipment and can be used to seal oil cavity support of turbomachine rotor. Seal comprises radial-end contact seal, which consists of the body forming an oil cavity of the rotor support fixed on the support casing, Rotary bush, two split sealing ring installed in the body butt-jointed to each other with interference fit on cylindrical surfaces of rings so that sections of sealing rings are located diametrically opposite, and labyrinth seal, seal of the pre-storage oil cavity of the rotor support, formed by labyrinth ring, fixed on the rotor, and the body. Besides, the second split seal ring is fitted concentrically with tension inside the first split sealing ring against the stop in the first ring of its free cantilever part, from which it is in contact with the housing. Split sealing rings are pressed to the case by elastic forces of these rings and air pressure in the pre-storage oil cavity of the rotor support, and to each other and collar-pressure air. Flange bushing is made with flanging, forming annular bath filled with oil. In the flange there are through holes equidistibuted along a circle, through which under action of centrifugal forces oil from the bath is supplied to lubrication of the contact surfaces of the bushing and split sealing ring and evenly spread along these surfaces rotating sleeve. In the end of the first sealing ring is pressed pin entering with clearance in blind hole in the second split seal ring. Clearance in sections of sealing rings and interference between split sealing rings and body are selected so that in the absence of excessive air pressure in the pre-storage oil cavity of the rotor support and ambient temperature does not ensure turning split sealing rings relative to the housing, and at maximum operating temperature in the support gap in sections or completely.
EFFECT: higher reliability of device.
4 cl, 5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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|
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| END GAS DYNAMIC SEAL OF TURBOMACHINE ROTOR SUPPORT | 2015 |
|
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| RADIAL-FACE CONTACT SEAL | 1990 |
|
RU2037704C1 |
