초록 ▼

A labyrinth seal system for reducing leakage flow of a compressible fluid between a rotating portion of a machine rotating relative to a stationary portion of the machine. A stator seal element is connected to the stationary portion of the machine and a rotor seal element is connected to the rotatin

A labyrinth seal system for reducing leakage flow of a compressible fluid between a rotating portion of a machine rotating relative to a stationary portion of the machine. A stator seal element is connected to the stationary portion of the machine and a rotor seal element is connected to the rotating portion of the machine. The rotor seal element defines a plurality of staggered cavities. Straight long teeth connected to the stator seal element define throttling clearances with the bottom walls of the staggered cavities of the rotor seal element, and short teeth connected to the stator seal element slanted upstream relative to the direction of leakage flow define throttling clearances with the rotor seal element. Undercuts can optionally be defined by the rotor seal element on the downstream side of the cavities. Optional straight teeth connected to the rotor seal element downstream of the cavities define throttling clearances with the stator seal element. The short teeth of the stator seal element can optionally be straight. Optionally all the teeth can be slanted in the direction of leakage flow. The configurations of the rotor seal element and the stator seal element can be reversed.

대표청구항 ▼

A seal system for reducing leakage flow of a compressible fluid between a rotating portion of a machine rotating relative to a stationary portion of the machine, comprising, in combination, a first seal element having a first cylindrical surface, said first seal element being adapted to be connected

A seal system for reducing leakage flow of a compressible fluid between a rotating portion of a machine rotating relative to a stationary portion of the machine, comprising, in combination, a first seal element having a first cylindrical surface, said first seal element being adapted to be connected to one of the portions of the machine, a second seal element having a second cylindrical surface at a first radial distance, said second seal element being adapted to be connected to the other of the portions of the machine, a third cylindrical surface defined by said first seal element spaced from said second cylindrical surface at a second radial distance greater than said first radial distance, said third cylindrical surface and said first seal element defining cavity means for increasing turbulence of the leaking flow, first throttling means connected to said second cylindrical surface of said second seal element and extending toward said third cylindrical surface to define a first throttling clearance with said third cylindrical surface for passing leakage flow so as to substantially eliminate the kinetic energy of the leakage flow passed, second throttling means connected to said second cylindrical surface of said second seal element and extending toward said first cylindrical surface to define a second throttling clearance with said first cylindrical surface for passing leakage flow so as to substantially eliminate the kinetic energy of the leakage flow passed, and third throttling means connected to said first cylindrical surface of said first seal element and extending toward said second cylindrical surface to define a third throttling clearance with said second cylindrical surface for passing leakage flow so as to substantially eliminate the kinetic energy of the leakage flow passed.