Assembly providing contaminant removal

摘要

An assembly for the removal of contaminants from a contact zone between respective contact surfaces 6, 8 of a first component 2 and a second component 4. At least one of the contact surfaces has a low friction element 10 provided with grooves 12 which extend through the contact zone such that, in operation, a pressure difference across the contact zone causes contaminants entering the grooves 12 to be expelled along the grooves 12 from the contact zone.

主权项

1. An assembly for a gas turbine engine comprising:
first and second components of the gas turbine engine having respective contact surfaces which contact each other over a contact zone, the first and second components being moveable relative to each other at their respective contact surfaces, the contact zone having a first edge and a second edge; and a groove formed in at least one of the contact surfaces, the groove extending entirely across the contact zone from the first edge to the second edge to form an opening between the contact surfaces at one or both of the first and second edges such that, in operation, a pressure difference across the contact zone causes contaminants entering the groove to be expelled along the groove from the contact zone, the first and second components remaining substantially undeformed at their contact surfaces during use, one of the components being an aerofoil component having a root portion accommodated in a slot of the other component, the contact surfaces comprising a surface of the root portion and a surface bounding the slot.