Stuffing box seal
AssigneeJ. M. Voith GmbH
InventorsMichael Piper, Reimund Rienecker, Rudi Kleinert, Walter Schneider
Life of this patent
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Abstract
The invention relates to a stuffing box seal to provide a sealing action between a stationary wall of a housing or the like and a shaft. In accordance with the invention the shaft is provided with a collar, or with a ring or ring flange, which is sealingly connected with the shaft and is such a manner as to prevent relative twist, having an annular surface perpendicular to the axis of rotation of the shaft, against which ring surface box packing bears with a sealing action in the direction parallel to the shaft axis.
Claims8
A stuffing box seal, providing a sealing action between a shaft and a stationary wall of a housing, comprising:
- (a) at least two rings of stuffing box packing arranged in an annular space formed about said shaft;
- (b) a collar mounted on said shaft having an exposed axial surface generally perpendicular to the axis of rotation of said shaft against which said stuffing box packing bears in the direction of the axis of said shaft;
- and
- (c) said housing having a surface facing said stuffing box packing which has grooves arranged in a zigzag manner thus forming teeth and surface irregularities parallel to the axis of rotation of said shaft, each of said irregularities having an angular sharp edge leasing in the direction of rotation.
The stuffing box seal of claim 11 wherein said stuffing box packing comprises at least three rings with a corresponding length to width ratio in the radial cross-section of at least 3:1.
Dependencies are inferred from the claim text.