US 11,753,956 B2
Seal structure for gas turbine rotor blade
Yoshinori Soda, Tokyo (JP); Tsuyoshi Takemoto, Tokyo (JP); Jun Tateishi, Tokyo (JP); Tomotake Ogawa, Tokyo (JP); and Misato Mori, Tokyo (JP)
Assigned to IHI Corporation, Tokyo (JP)
Filed by IHI Corporation, Koto-ku (JP)
Filed on Nov. 29, 2018, as Appl. No. 16/204,183.
Application 16/204,183 is a continuation of application No. PCT/JP2016/071714, filed on Jul. 25, 2016.
Prior Publication US 2019/0093493 A1, Mar. 28, 2019
Int. Cl. F01D 11/00 (2006.01); F01D 5/14 (2006.01); F01D 5/22 (2006.01); F01D 5/30 (2006.01)
CPC F01D 11/006 (2013.01) [F01D 5/147 (2013.01); F01D 5/22 (2013.01); F01D 5/3007 (2013.01); F05D 2220/32 (2013.01); F05D 2240/55 (2013.01); F05D 2240/80 (2013.01); F05D 2250/23 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A seal structure for a gas turbine rotor blade, the seal structure comprising:
first and second rotor blades arranged and adjacent to each other in a circumferential direction of a rotor shaft and extending in a radial direction of the rotor shaft, each of the first and second rotor blades including a blade body, a shank including a platform and a root portion, and a fin projecting forward of the blade body from the shank; and
a wedge seal member and a spline seal member positioned between the first and second rotor blades,
each shank including a first side surface, a second side surface, and a bottom surface located inward in the radial direction from the fin,
the first side surface of the first blade including a recess extending in a direction from a front side to a rear side of the blade body, and a first slot extending in a direction from the platform to the root portion and open on the bottom surface,
the second side surface of the second blade including a second slot extending in the direction from the platform to the root portion and open on the bottom surface,
the recess of the first blade including an inclined surface extending straight inward in the radial direction and away from the first side surface,
the wedge seal member being housed movably in the radial direction and the circumferential direction in the recess of the first rotor blade, the wedge seal member including a wedge portion and a weight portion integrated with the wedge portion, the weight portion being positioned radially inward of the wedge portion in the recess of the first rotor blade,
the wedge portion including a first wedge surface and a second wedge surface, the first wedge surface being opposed to the inclined surface of the recess of the first rotor blade and the second wedge surface being opposed to the second side surface of the second rotor blade, the first wedge surface and the second wedge surface forming a top portion of the wedge,
the first slot including a first receiving portion projecting forward from an inner surface of the first slot,
the second slot including a second receiving portion projecting forward from an inner surface of the second slot,
the first slot of the first rotor blade and the second slot of the second rotor blade forming an insertion opening for the spline seal member, and
the first receiving portion of the first rotor blade and the second receiving portion of the second rotor blade are formed as part of an edge of the insertion opening to receive the spline seal member provided in the first slot of the first rotor blade and the second slot of the second rotor blade.