The labyrinth seals (LU) of the “TRIZ” construction have been used since 1990 in order to reduce the flow of compressible medium between rotating and stationary elements of centrifugal compressors, blowers, turboexpanders, steam and gas turbines and other equipment. They are used as interstage, intersectional, end seals, as well as seals for unloading devices and are designed for specific operating parameters.
Satisfy the requirements of the API 617 standard (Certificate No. ODC1820-0749 / 1)
•high sealing ability;
•anti-circulatory, do not excite vibrations;
•high damping ability, reduced vibration;
•allow short-term contact with rotating elements (polymer);
•long operational resource;
•low wear, stability of gaps;
•installation in existing regular places;
•compactness, high maintainability (replacement of polymer inserts).
LU TRIZ® are designed to provide minimal leakage with minimal aerodynamic impact on the rotor. Leakage minimization is provided by reducing the gap, efficient seal design and reducing vibration. The labyrinth seal design affects not only the compression efficiency, but also the reliability of the unit. The oscillations of the rotors caused by the action of gas-dynamic forces in the seals are present in medium and high pressure compressors due to the entry into the labyrinth seals of a swirling flow, leading to the appearance of a circulating force.
The oscillations of the rotors caused by the action of gas-dynamic forces in the seals arise in medium and high pressure compressors due to the entry into the labyrinth seals of a swirling flow, leading to the appearance of circulating force. “TRIZ” supplies intersection seals to these positions, the inner sealing surface of which is made in the form of alternating rows of holes with scallops made of an anti-seize material. The wells inhibit swirling gas flow, which prevents the occurrence of exciting circulatory forces, and scallops reduce leakage. The highest efficiency is achieved using stepped labyrinth-hole wells LU TRIZ and bearings TD TRIZ.
At the entrance of the impeller seals, half-open or closed wells are used.
Seals are available on request for a given installation dimensions and operating conditions in a short time. Usually 90 days. To order, the questionnaire must be filled out.
Warranty period – 24 months