| 摘要 |
This labyrinth seal has first and second relatively movable members with a rub-tolerant layer on one and spaced, continuous projections on the other. The projections have relatively thin edges initially disposed in closely spaced relation to the surface of the rub-tolerant layer, and when relative movement between the members takes place, some engagement of the edges with the rub-tolerant layer may take place. The layer is of a composition such that when the edges of the projections engage it during relative movement, some of the material will be compressed or moved to one or both sides of the projections to form grooves. The displaced material builds up at the sides of the grooves and increases their effective depth. The spacing of the projections exceeds the potential relative lateral movement between the members so that the resulting ribs at the sides of the grooves will not be destroyed. The resulting interfitting projection edges and grooves form a tortuous passage and reduce the flow of fluids between the members.
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