Patent ID: 9051882
Filing Date: 2015-06-09
Classification: F01D,F02C,F05D,F16J

Abstract:
1. A seal assembly for use in a gas turbine engine comprising a rotating engine component configured to rotate about a rotational axis, a stationary engine component positioned in a fixed orientation relative to the rotational axis and spaced apart from the rotating engine component to form a gap therebetween, and a sealing unit positioned in the gap between the stationary engine component and the rotating engine component, the sealing unit including a body and a coating, the body including a first surface and a second surface, the coating coupled to the first surface establishes a coated first surface and at least a portion of the second surface is free from the coating to establish an uncoated portion of the second surface, and the coated first surface directly engages the stationary engine component and the uncoated portion of the second surface directly engages the rotating engine component to form a mechanical seal between the stationary engine component and the rotating engine component.