초록 ▼

A method and apparatus for reducing thermal distress and creep of a disk post in a gas turbine engine, the disk post being defined between an adjacent pair of blade roots of a respective pair of turbine blades in a turbine disk. The blade roots extend radially outward of the turbine disk and each te

A method and apparatus for reducing thermal distress and creep of a disk post in a gas turbine engine, the disk post being defined between an adjacent pair of blade roots of a respective pair of turbine blades in a turbine disk. The blade roots extend radially outward of the turbine disk and each terminate in a blade platform to form a cavity above the disk post. A seal generally covers the cavity for preventing a flow of combustion gases over the disk post. The seal includes axial segments defining a channel over a radially outer surface of the disk post. A flow of insulative air is directed into the channel defined over the disk post and diffused to reduce its velocity. The insulative air effectively reduces heat transferred from the blade platforms and combustion gases to the disk post.

대표청구항 ▼

Apparatus for thermal protection of a disk post in a gas turbine engine, the disk post being defined by adjacent slots in a turbine rotor disk, each of the slots being adapted for receiving a root portion of a turbine rotor blade, each blade having a shank extending radially outward from the root po

Apparatus for thermal protection of a disk post in a gas turbine engine, the disk post being defined by adjacent slots in a turbine rotor disk, each of the slots being adapted for receiving a root portion of a turbine rotor blade, each blade having a shank extending radially outward from the root portion and a platform atop the shank, the apparatus comprising: (a) a first end plate sized for generally covering a forward end of an opening above a respective disk post, the opening being defined by a top of the disk post, the shanks of the rotor blades on each side of the disk post and the platforms atop the shanks; (b) a second end plate positioned generally within an aft end of the opening; (c) a connecting member extending between the first and second end plates for maintaining a preselected orientation and spacing of the end plates, the connecting member including first and second legs extending therefrom and defining a channel over the top of the disk post; and (d) an aperture formed in the first end plate and opening into the channel for admitting a controlled flow of air axially into the channel for providing an insulative layer of air over the top of and in direct contact with the disk post; and wherein each of said first and second legs include distal ends which are sized such that a clearance between each of said distal ends and said top of the disk post establishes a controlled degree of air leakage around each of said distal ends for reducing a temperature in a portion of said opening located radially outward from said channel and for increasing a pressure in said portion of said opening, thereby providing increased protection from ingestion of combustion gasses into said portion of said opening.