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A blade retaining system for securing rotor blades to a rotor disc used in gas turbine engines includes an inwardly radially extending annular groove defined in the periphery of the rotor disc, intersecting the "fir tree" mounting slots into which the rotor blades are mounted. A resilient split ring

A blade retaining system for securing rotor blades to a rotor disc used in gas turbine engines includes an inwardly radially extending annular groove defined in the periphery of the rotor disc, intersecting the "fir tree" mounting slots into which the rotor blades are mounted. A resilient split ring is received in both the annular groove of the rotor disc and a groove defined in the bottom end of the root portion of each blade, in order to restrain axial movement of the blade relative to the rotor disc. The resilient split ring under its radial expanding spring force, radially and outwardly abuts the rotor blades and is radially spaced apart to ensure the engagement in both the grooves of the rotor disc and each rotor blade, while permitting disengagement therefrom when required. The resilient split ring is disposed downstream of the cooling air inlets in the bottom end of each rotor blade to direct the cooling air into the inlets in order to facilitate the blade cooling air circulation. The blade retaining structure is simple to manufacture and maintain.

대표청구항 ▼

A blade retaining system for securing rotor blades to a rotor disc used in gas turbine engines includes an inwardly radially extending annular groove defined in the periphery of the rotor disc, intersecting the "fir tree" mounting slots into which the rotor blades are mounted. A resilient split ring

A blade retaining system for securing rotor blades to a rotor disc used in gas turbine engines includes an inwardly radially extending annular groove defined in the periphery of the rotor disc, intersecting the "fir tree" mounting slots into which the rotor blades are mounted. A resilient split ring is received in both the annular groove of the rotor disc and a groove defined in the bottom end of the root portion of each blade, in order to restrain axial movement of the blade relative to the rotor disc. The resilient split ring under its radial expanding spring force, radially and outwardly abuts the rotor blades and is radially spaced apart to ensure the engagement in both the grooves of the rotor disc and each rotor blade, while permitting disengagement therefrom when required. The resilient split ring is disposed downstream of the cooling air inlets in the bottom end of each rotor blade to direct the cooling air into the inlets in order to facilitate the blade cooling air circulation. The blade retaining structure is simple to manufacture and maintain. paratus, and a secondary wick which separates a volume of liquid from a volume of vapor that are disposed in an evaporator section of the heat pipe, and wherein said secondary wick feeds said liquid to the primary wick. 5. An evaporator structure comprising: a first wick structure; and, a second wick structure disposed adjacent the first wick structure, wherein a liquid is disposed within the evaporator adjacent to said first wick structure such that said first wick structure lies between said liquid and said second wick structure and wherein said first wick structure feeds said liquid to said second wick structure. 6. An evaporator for a capillary pumped two phase loop comprising: a primary wick which controls evaporation from a primary heat input area; and, a secondary wick that is arranged so as to separate a volume of liquid from a volume of vapor that are disposed in the evaporator, wherein said secondary wick feeds liquid from said liquid volume into the primary wick. 7. The evaporator of claim 6, wherein heat from the primary heat input area enters the evaporator on the liquid side of the primary wick. 8. The evaporator of claim 6, wherein the primary and secondary wicks are formed of different materials. 9. The evaporator of claim 6, wherein said secondary wick determines the loop pressure of the heat pipe. 10. The evaporator of claim 6, wherein said primary wick has smaller pores than said secondary wick.