Labyrinth seal for rotary shaft - has set of ring plates rigidly fixed to shaft and set fixed to stationary sleeve which has through passage passing through it

摘要

The labyrinth seal of a shaft comprises ring plates arranged in an alternating fashion in parallel with one another and coaxially with the shaft. One set of plates are rigidly fixed to the shaft and the other set of plates are fixed to a stationary sleeve. The sleeve has at least one through passage arranged in a plane intersecting the axis of the shaft and extending at angle ranging from about -60 degrees to about +60 degrees to a radial plane running at right angles to the axis of the shaft. The passage terminates at one end in the space between adjacent plates to remove the fluid under action of centrifugal force during rotation of the shaft.