Abstract: Improved labyrinth seal designs are disclosed. The present invention relates to labyrinth seal systems with selected sealing surfaces and seal geometry to optimize flow deflection and produce maximum turbulent action. Optimum seal performance is generally accomplished by providing sealing surfaces and fluid cavities formed to dissipate fluid energy as a function of the geometry of the sealing surfaces along with the position and size of the fluid cavities formed between members of the labyrinth seal system. Improved convex surfaces, annular flow reversal grooves, flow deflection blocks and rough, machined surfaces cooperate to enhance the performance of the labyrinth seal systems. For some labyrinth seal systems a mid-cavity throttle and either rigid teeth or flexible spring teeth may be included.

Abstract: An improved design for a labyrinth seal is disclosed. The present invention relates to a radially stepped labyrinth seal whereby the geometry of the sealing surfaces is to optimize flow deflection, thereby producing maximum turbulent shearing action. This is generally accomplished by the formation of sealing surfaces where the shape of the seal components is established as a function of the minimum clearance between the relatively movable members.