Introduction to Labyrinth Seals with Comb-Tooth Profiles
Apr 20, 2026| A comb-tooth labyrinth seal is a type of steam seal designed to create a tortuous sealing passage. This structure constructs the sealing channel through an arrangement of multiple rows of comb-like teeth, achieving its sealing effect by utilizing the kinetic energy dissipation of the fluid medium as it flows through the narrow, elongated passage.
The sealing mechanism of the comb-tooth labyrinth seal is predicated on the principle of throttling expansion, wherein flow resistance is increased by varying the cross-sectional area of the flow path. Internally, the seal features a continuous converging-diverging flow channel structure formed by an alternating arrangement of protruding teeth and recessed grooves, which effectively minimizes medium leakage.
This type of seal is classified as a non-contact sealing device, offering stability and reliability under high-temperature and high-pressure operating conditions. Its distinctive design feature lies in the optimization of its geometry to elongate the leakage path, thereby enhancing the overall efficiency of the sealing system.