Turbine blade nested seal and damper assembly
First Claim
Patent Images
1. A gas turbine engine rotor assembly comprising:
- a multitude of blades spaced apart from each other for rotation about an axis of rotation, each of said plurality of turbine blades having a blade platform which defines an inner platform surface and an outer platform surface;
a damper having a lengthwise seal slot and an aft seal surface adjacent said inner platform surface, said damper includes a damper body with a forward leg which extends from said damper body transverse to said lengthwise seal slot and an aft leg which extends from said damper body transverse to said lengthwise seal slot and generally parallel to said forward leg, said aft leg having an aft seal surface; and
a seal nested with said lengthwise seal slot and disposed adjacent said inner platform surface.
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Abstract
A turbine blade damper-seal assembly includes a seal nested within a damper such that both the seal and damper are disposed to provide sealing between adjacent blade platforms. The seal traverses the seal slot in the damper and seals the gap between adjacent blade platforms for the full axial length of the neck cavity between adjacent blades. The damper is located in an aft most position and includes features to facilitate vibration-dampening performance. The damper also includes features that cause entrapment between blades and therefore avoids the conventionally required protrusions on the blade to retain it in the assembled position.
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Citations
31 Claims
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1. A gas turbine engine rotor assembly comprising:
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a multitude of blades spaced apart from each other for rotation about an axis of rotation, each of said plurality of turbine blades having a blade platform which defines an inner platform surface and an outer platform surface; a damper having a lengthwise seal slot and an aft seal surface adjacent said inner platform surface, said damper includes a damper body with a forward leg which extends from said damper body transverse to said lengthwise seal slot and an aft leg which extends from said damper body transverse to said lengthwise seal slot and generally parallel to said forward leg, said aft leg having an aft seal surface; and a seal nested with said lengthwise seal slot and disposed adjacent said inner platform surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A gas turbine engine rotor assembly comprising:
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a multitude of blades spaced apart from each other for rotation about an axis of rotation, each of said plurality of turbine blades having a blade platform which defines an inner platform surface, an outer platform surface, a forward portion and an aft portion, said inner and outer platform surfaces extend therebetween; a damper having a lengthwise seal slot and an aft seal surface adjacent said inner platform surface, said damper disposed adjacent said aft portion; and a seal nested with said lengthwise seal slot and disposed adjacent said inner platform surface. - View Dependent Claims (10, 11)
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12. A gas turbine engine rotor assembly comprising:
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a multitude of blades spaced apart from each other for rotation about an axis of rotation, each of said plurality of turbine blades having a blade platform which defines an inner platform surface and an outer platform surface; a damper having a lengthwise seal slot and an aft seal surface adjacent said inner platform surface; a seal nested with said lengthwise seal slot and disposed adjacent said inner platform surface; and a rotor disk having a radial lug on an outer diameter which restricts axial movement of said damper.
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13. A damper and seal assembly for a gas turbine engine rotor blade comprising:
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a damper body defining a lengthwise seal slot, said damper body having an aft seal surface; a damper forward protrusion that extends said lengthwise seal slot, said damper forward protrusion includes lateral extensions which extend laterally relatively to said lengthwise seal slot; and a seal nested within said lengthwise seal slot, said seal includes mid-section tangs engageable with said lateral extension and said damper body. - View Dependent Claims (14, 15, 16, 17, 18, 20)
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19. The assembly as recited in claim l3, wherein said damper has a center of gravity aft of a longitudinal center.
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21. A damper comprising:
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a damper body which defines a lengthwise seal slot; a forward leg which extends from said damper body transverse to said lengthwise seal slot; and an aft leg which extends from said damper body transverse to said lengthwise seal slot and generally parallel to said forward leg, said aft leg having an aft seal surface. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A seal comprising:
a seal member having a top surface with a lengthwise seam and a forward seal area with a forward width, a bridge seal area aft of the forward seal area, said bridge seal area having a bridge width less than the first width and an aft seal area having an aft width, said aft width greater than said bridge width. - View Dependent Claims (28, 29, 30, 31)
Specification