# Patent

## Title
Near flow path seal for a turbomachine

## Abstract

A near flow path seal member for a turbomachine includes a seal body having a seal support member including a first end portion that extends to a second end portion through an intermediate portion. An arm member extends from the first end portion of the seal body. The arm member has a first end that extends to a second end to define an axial dimension of the arm member, a first edge that extends to a second, opposing edge to define a circumferential dimension of the arm member, and a surface having a profile that establishes a thickness variation of the arm member in each of the axial dimension and the circumferential dimension.

## Background
BACKGROUND OF THE INVENTION
The subject matter disclosed herein relates to the art of turbomachines and, more particularly, to a near flow path seal for a turbomachine.
Turbomachines include a casing that houses a turbine. The turbine includes a plurality of blades or buckets that extend along a gas path. The buckets are supported by a number of turbine rotors that define a plurality of turbine stages. A combustor assembly generates hot gases that are passed through a transition piece toward the plurality of turbine stages. In addition to hot gases from the combustor assembly, gases at a lower temperature flow from a compressor toward a wheelspace of the turbine. The lower temperature gases provide cooling for the rotors as well as other internal components of the turbine. In order to prevent hot gases from entering the wheelspace, the turbine includes near flow path seals that are arranged between adjacent rotors. The near flow path seals are configured to fit closely adjacent the rotors or buckets to reduce leakage from the gas path into the wheelspace.
BRIEF DESCRIPTION OF THE INVENTION
According to one aspect of the exemplary embodiment, a near flow path seal member for a turbomachine includes a seal body having a seal support member including a first end portion that extends to a second end portion through an intermediate portion. An arm member extends from the first end portion of the seal body. The arm member has a first end that extends to a second end to define an axial dimension of the arm member, a first edge that extends to a second, opposing edge to define a circumferential dimension of the arm member, and a surface having a profile that establishes a thickness variation of the arm member in each of the axial dimension and the circumferential dimension.
According to another aspect of the exemplary embodiment, a turbomachine includes a compressor portion, a combustor assembly fluidly connected to the compressor portion, and a turbine portion fluidly connected to the combustor assembly and mechanically linked to the compressor portion. The turbine portion includes a first stage, a second stage, a third stage and a fourth stage. A near flow path seal member is positioned between one of the first, second, third, and fourth stages of the turbine portion. The near flow path seal member includes a seal body having a seal support member including a first end portion that extends to a second end portion through an intermediate portion, and an arm member that extends from the first end portion of the seal body. The arm member having a first end that extends to a second end to define an axial dimension of the arm member, a first edge that extends to a second, opposing edge to define a circumferential dimension of the arm member, and a surface having a profile that establishes a thickness variation of the arm member in each of the axial dimension and the circumferential dimension.
These and other advantages and features will become more apparent from the following description taken in conjunction with the drawings.



BRIEF DESCRIPTION OF THE DRAWING
The subject matter, which is regarded as the invention, is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a turbomachine including a turbine portion having a near flow path seal member in accordance with an exemplary embodiment;
FIG. 2 is a partial cross-sectional side view of the turbine portion of FIG. 1 including a near flow path seal member arranged between turbine stages;
FIG. 3 is a perspective view of a near flow path seal member in accordance with one aspect of the exemplary embodiment;
FIG. 4 is a plan view of the near flow path seal member of FIG. 3;
FIG. 5 is a perspective view of a near flow path seal member in accordance with another aspect of the exemplary embodiment;
FIG. 6 is a plan view of the near flow path seal member of FIG. 4;
FIG. 7 is a perspective view of a near flow path seal member in accordance with yet another aspect of the exemplary embodiment; and
FIG. 8 is a plan view of the near flow path seal member of FIG. 7.



The detailed description explains embodiments of the invention, together with advantages and features, by way of example with reference to the drawings.
DETAILED DESCRIPTION OF THE INVENTION
With reference to FIGS. 1 and 2, a turbomachine constructed in accordance with an exemplary embodiment is indicated generally at 2. Turbomachine 2 includes a compressor portion 4 operatively connected to a turbine portion 6. A combustor assembly 8 is fluidly connected to compressor portion 4 and turbine portion 6. Combustor assembly 8 is formed from a plurality of circumferentially spaced combustors, one of which is indicated at 10. Of course it should be understood that combustor assembly 8 could include other arrangements of combustors. Compressor portion 4 is also linked to turbine portion 6 through a common compressor/turbine shaft 12. Combustor assembly 8 delivers products of combustion through a transition piece (not shown) to a gas path 18 in turbine portion 6. The products of combustion expand through turbine portion 6, for example, power a generator, to a pump, an aircraft or the like.
In the exemplary embodiment shown, turbine portion 6 includes a number of stages one of which is shown at 20. Of course it should be understood that the number of stages in turbine portion 6 could vary. Stage 20 includes a plurality of stators or nozzles, one of which is indicated at 30, and a plurality of buckets or blades, one of which is indicated at 32, mounted to a rotor wheel (not shown). In the exemplary embodiment shown, another plurality of blades or buckets, one of which is indicated at 40 is arranged upstream of nozzle 30. Bucket 40 form part of an upstream stage in turbine portion 6. Turbomachine 2 is also shown to include a plurality of near flow path seal members one of which is indicated at 60 arranged between buckets 32 and 40 and below nozzle 30. Near flow path seal members 60 are mounted to shaft 12 through a seal member rotor 65. Near flow path seal members 60 are configured to prevent an exchange of gases between gas path 18 and a wheelspace 70 of turbomachine 2. At this point it should be understood that turbomachine 2 includes additional near flow path seal members (not shown) arranged between adjacent stages (also not shown) of turbine portion 6.
Reference will now be made to FIGS. 3 and 4 in describing near flow path seal member 60 in accordance with an exemplary embodiment. Near flow path seal member 60 includes a seal body 80 having a seal support member 84. Seal support member 84 includes a first end portion 86 that extends to a second end portion 87 through an intermediate portion 88. A dove tail member 90 is provided at second end portion 87 of seal support member 84. Dove tail member 90 provides an interface between near flow path seal member 60 and seal member rotor 65.
Near flow path seal member 60 includes a first arm member 94 that is cantilevered from first end portion 86 of seal support member 84. First arm member 94 includes a first end 96 that extends to a second end 97 that define an axial dimension, and first and second opposing edges 99 and 100 that define a circumferential dimension. Near flow path seal member 60 also includes a first surface section 104. First surface section 104 includes a first end section 105 that extends from first end 96 of first arm member 94 to a second end section 106 through an intermediate section 108. Second end section 106 is positioned at second end portion 87 of seal support member 84. First surface section 104 is also shown to include a recess portion 110 provided at first end section 105. In accordance with the exemplary embodiment, first surface section 104 includes a profile 112 that is defined by a point cloud or set of points listed in TABLE 1 below. The set of points describe X, Y, Z coordinates that define first surface section 104. The particular configuration of profile 112 provides desired clearance and performance properties for near flow path seal member 60. In addition, profile 112 establishes variations in each of the axial and circumferential dimensions. More specifically, a thickness of first arm member 94 varies across each of the axial and circumferential dimensions.
Near flow path seal member 60 also includes a second arm member 116 that is cantilevered from first end portion 86 of seal support member 84. Second arm member 116 includes a first end 118 that extends to a second end 119 that define an axial dimension, and first and second opposing edges 121 and 122 that define a circumferential dimension. Second arm member 116 also includes a second surface section 124. Second surface section 124 includes a first end section 127 that extends from first end 118 of second arm member 116 to a second end section 128 through an intermediate section 129. Second end section 128 is positioned at second end portion 87 of seal support member 84. Second surface section 124 is also shown to include a recess portion 131 provided at first end section 127. In accordance with the exemplary embodiment, second surface section 127 includes a profile 133 that is defined by a point cloud or set of points listed in TABLE 2 below. The set of points describe X, Y, Z coordinates that define surface portion 124. The particular configuration of profile 133 provides desired clearance and performance properties for near flow path seal member 60.
In a manner similar to that described above, profile 133 establishes variations in each of the axial and circumferential dimensions. More specifically, a thickness of second arm member 116 varies between each of the axial and circumferential dimensions. Finally, near flow path seal member 60 is shown to include a seal surface 135 that extends from first end 96 of first arm member 94 to first end 118 of second arm member 116. A plurality of seal elements 137-141 extend outward from and are spaced along seal surface 135. Seal elements 137-141 that cooperate with additional seal elements (not separately labeled) associated with second stage nozzle 37 to establish a labyrinth seal that limits the exchange of fluids between gas path 18 and wheel space 70.
Reference will now follow to FIGS. 5 and 6 in describing near flow path seal member 62. Near flow path seal member 62 includes a seal body 154 having a seal support member 158. Seal support member 158 includes a first end portion 160 that extends to a second end portion 161 through an intermediate portion 162. A dove tail member 164 is provided at second end portion 161 of seal support member 158. Dove tail member 164 provides an interface between near flow path seal member 62 and turbomachine 2.
Near flow path seal member 62 includes a first arm member 168 that is cantilevered from first end portion 160 of seal support member 158. First arm member 168 includes a first end 170 that extends to a second end 171 that define an axial dimension, and first and second opposing edges 173 and 174 that define a circumferential dimension. Near flow path seal member 62 also includes a first surface section 178. First surface section 178 includes a first end section 180 that extends from first end 170 of first arm member 168 to a second end section 181 through an intermediate section 182. Second end section 181 is positioned at second end portion 161 of seal support member 158. First surface section 178 is also shown to include a recess portion 184 provided at first end section 180. In accordance with the exemplary embodiment, first surface section 178 includes a profile 186 that is defined by a point cloud or set of points listed in TABLE 3 below. The set of points describe X, Y, Z coordinates that define first surface section 178. The particular configuration of profile 186 provides desired clearance and performance properties for near flow path seal member 62. In addition, profile 186 establishes variations in each of the axial and circumferential dimensions. More specifically, a thickness of first arm member 168 varies between each of the axial and circumferential dimensions.
Near flow path seal member 62 also includes a second arm member 189 that is cantilevered from first end portion 160 of seal support member 158. Second arm member 189 includes a first end 191 that extends to a second end 192 that define an axial dimension, and first and second opposing edges 194 and 195 that define a circumferential dimension. Near flow path seal member 62 also includes a second surface section 197. Second surface section 197 includes a first end section 199 that extends from first end 191 of second arm member 189 to a second end section 200 through an intermediate section 201. Second end section 200 is positioned at second end portion 161 of seal support member 158. Second surface section 197 is also shown to include a recess portion 202 provided at first end section 199. In accordance with the exemplary embodiment, second surface section 197 includes a profile 203 that is defined by a point cloud or set of points listed in TABLE 4 below. The set of points describe X, Y, Z coordinates that define second surface section 197. The particular configuration of profile 203 provides desired clearance and performance properties for near flow path seal member 62.
In a manner similar to that described above, profile 203 establishes variations in each of the axial and circumferential dimensions. More specifically, a thickness of second arm member 189 varies between each of the axial and circumferential dimensions. Finally, near flow path seal member 62 is shown to include a seal surface 205 that extends from first end 170 of first arm member 168 to first end 191 of second arm member 189. A plurality of seal elements 207-211 extend outward from and are spaced along seal surface 205. Seal elements 207-211 cooperate with additional seal elements (not separately labeled) associated with third stage nozzle 44 to establish a labyrinth seal that limits the exchange of fluids between gas path 18 and wheel space 70.
Reference will now follow to FIGS. 7 and 8 in describing near flow path seal member 64. Near flow path seal member 64 includes a seal body 214 having a seal support member 216. Seal support member 216 includes a first end portion 218 that extends to a second end portion 219 through an intermediate portion 220. A dove tail member 222 is provided at second end portion 219 of seal support member 216. Dove tail member 222 provides an interface between near flow path seal member 64 and turbomachine 2.
Near flow path seal member 64 includes a first arm member 224 that is cantilevered from first end portion 218 of seal support member 216. First arm member 224 includes a first end 226 that extends to a second end 227 that define an axial dimension, and first and second opposing edges 229 and 230 that define a circumferential dimension. Near flow path seal member 64 also includes a first surface section 232. First surface section 232 includes a first end section 234 that extends from first end 226 of first arm ember 224 to a second end section 235 through an intermediate section 236. Second end section 235 is positioned at second end portion 219 of seal support member 216. In accordance with the exemplary embodiment, first surface section 232 includes a profile 240 that is defined by a point cloud or set of points listed in TABLE 5 below. The set of points describe X, Y, Z coordinates that define first surface section 232. The particular configuration of profile 240 provides desired clearance and performance properties for near flow path seal member 64. In addition, profile 240 establishes variations in each of the axial and circumferential dimensions. More specifically, a thickness of first arm member 224 varies between each of the axial and circumferential dimensions.
Near flow path seal member 64 also includes a second arm member 243 that is cantilevered from first end portion 218 of seal support member 216. Second arm member 243 includes a first end 245 that extends to a second end 246 that define an axial dimension, and first and second opposing edges 248 and 249 that define a circumferential dimension. Near flow path seal member 64 also includes a second surface section 251. Second surface section 251 includes a first end section 253 that extends from first end 245 of second arm ember 243 to a second end section 254 through an intermediate section 255. Second end section 254 is positioned at second end portion 219 of seal support member 216. Second surface section 251 is also shown to include a recess portion 258 provided at first end section 253. In accordance with the exemplary embodiment, second surface section 251 includes a profile 260 that is defined by a point cloud or set of points listed in TABLE 6 below. The set of points describe X, Y, Z coordinates that define second surface section 251. The particular configuration of profile 260 provides desired clearance and performance properties for near flow path seal member 64.
In a manner similar to that described above, profile 260 establishes variations in each of the axial and circumferential dimensions. More specifically, a thickness of second arm member 243 varies between each of the axial and circumferential dimensions. Finally, near flow path seal member 64 is shown to include a seal surface 264 that extends from first end 226 of first arm member 224 to first end 245 of second arm member 243. A plurality of seal elements 267-270 extend outward from and are spaced along seal surface 264. Seal elements 267-270 cooperate with additional seal elements (not separately labeled) associated with fourth stage nozzle 51 to establish a labyrinth seal that limits the exchange of fluids between gas path 18 and wheel space 70.









TABLE 1





X
Y
Z

















−0.748
0.39 
43.267


−3.322
−1.612
44.249


−0.5
1.155
42.35


−4.251
−0.325
44.406


−3.782 
0.325
44.35


−0.748
−1.923
43.267


−1.245
0.359
39.187


−0.594
0.388 
42.972


−0.544
0.388
42.798


−3.313
−0.325
44.294


−4.216 
1.135
44.375


−4.112
1.433
44.244


−3.708 
1.965 
44.2


−0.5
−0.381
41.548


−0.5 
−1.143
41.147


−2.055
1.194
44.072


−0.978
−1.935
43.546


−0.544
−1.902
42.798


−3.788
1.129
44.326


−2.844
−0.325
44.238


−3.313
−0.975
44.294


−2.844
−0.975
44.238


−4.112
−1.433
44.244


−0.5 
−1.143
41.949


−4.216
−1.135
44.375


−0.5
1.143
41.949


−2.055
−0.398
44.072


−2.825 
1.194
44.235


−0.594
1.164
42.972


−0.748 
1.923
43.267


−4.251 
0.325
44.406


−0.836
0.37
39.896


−0.585
−1.11
40.499


−3.313
0.975
44.294


−0.511 
1.892
42.575


−1.04
−1.076
39.541


−0.585
1.799
40.499


−0.978
−0.394
43.546


−0.594
−1.91
42.972


−0.5
1.143
41.147


−0.669
−1.917
43.137


−1.323
−1.946
43.785


−4.112
−1.967
44.244


−0.5
−1.828
41.147


−1.323
1.194
43.785


−3.708
−1.612 
44.2


−0.669
−0.388
43.137


−3.782
1.267
44.255


−0.5
1.864
41.949


−1.323
1.946
43.785


−4.112
1.967
44.244


−3.786
−1.965
44.199


−3.785
−0.975
44.35


−0.5 
−0.381
41.147


−2.055
0.398
44.072


−2.055
−1.959
44.072


−0.594
−1.164
42.972


−2.844
0.325
44.238


−2.055 
1.959
44.072


−1.141 
0.394 
43.679


−0.5
0.381 
41.147


−1.245 
−1.74 
39.187


−1.141
−1.941
43.679


−0.5
−1.143
41.548


−0.594
1.91
42.972


−2.437 
1.963
44.17


−4.133
−1.261
44.301


−1.04
0.359
39.541


−0.544
1.902
42.798


−0.5
−1.864
41.949


−0.837 
1.182 
43.39


−0.978
1.935
43.546


−0.978
1.182
43.546


−3.708
1.612 
44.2


−0.837
−1.928
43.39


−0.511
−0.385
42.575


−0.585
0.37
40.499


−0.748
−1.171
43.267


−1.683
−1.194
43.944


−1.323 
0.398
43.785


−1.245
−1.076
39.187


−1.04
−1.756
39.541


−2.844 
0.975
44.238


−0.585
1.11
40.499


−1.04
1.076
39.541


−3.787 
1.442
44.199


−3.785
0.975 
44.35


−0.978
0.394
43.546


−1.141
1.182
43.679


−1.141
−0.394
43.679


−2.825
1.966
44.235


−0.511 
1.155
42.575


−1.323
−1.194
43.785


−0.748
1.171
43.267


−0.836
−1.771
39.896


−0.836
−0.37
39.896


−0.5
1.846
41.548


−0.544
−0.388
42.798


−3.073
1.967
44.254


−3.786
1.965
44.199


−0.5
1.143
41.548


−3.708
−1.965
44.2


−3.377
−1.151
44.269


−2.825
−1.966
44.235


−2.437 
1.194 
44.17


−1.683
1.194
43.944


−2.437
−1.194 
44.17


−1.245
−0.359
39.187


−2.825
−1.195
44.235


−0.5 
−1.846
41.548


−0.5
−1.882
42.35


−1.141
1.941
43.679


−3.322 
1.256
44.249


−0.5
0.381
41.548


−3.322
1.612
44.249


−2.437
−0.398 
44.17


−1.683
0.398
43.944


−0.5
−0.381
41.949


−0.5 
0.381 
41.949


−0.836 
1.771 
39.896


−2.055 
−1.194
44.072


−2.437
−1.963
44.17


−0.511
0.385 
42.575


−3.787 
−1.442
44.199


−0.836 
−1.11
39.896


−4.251
0.975 
44.406


−0.5
0.385
42.35


−3.377 
1.151
44.269


−0.544
−1.164
42.798


−0.836
1.11
39.896


−1.245
1.74
39.187


−0.5
−1.155 
42.35


−1.683
1.953
43.944


−0.511
−1.892
42.575


−0.837
−1.182 
43.39


−3.322
−1.967
44.249


−1.04
−0.359
39.541


−0.585
−1.799
40.499


−1.323
−0.398
43.785


−0.748
−0.39
43.267


−3.782
−0.325
44.35


−0.5 
1.882 
42.35


−0.669
1.917
43.137


−3.708
−1.445
44.2


−0.978
−1.182
43.546


−0.837
0.394 
43.39


−0.669
0.39
43.137


−0.669
1.171
43.137


−1.683
−0.398
43.944


−2.825
−1.966
44.235


−0.5
−0.385 
42.35


−0.837
1.928
43.39


−3.073
−1.195
44.254


−0.5
1.828
41.147


−0.544 
1.164
42.798


−1.141
−1.182
43.679


−0.837
−0.394 
43.39


−1.04 
1.756
39.541


−1.683
−1.953
43.944


−2.437
0.398 
44.17


−0.669
−1.171
43.137


−0.594
−0.388
42.972


−4.133
1.261
44.301


−3.313
0.325
44.294


−0.585
−0.37
40.499


−3.073
1.195
44.254


−0.837
1.928 
43.39


−0.511
−1.155
42.575


−3.708 
1.445
44.2


−3.322 
1.967
44.249


−1.245 
1.076
39.187


−3.782
−1.267
44.255


−3.322
−1.256
44.249


−3.073
−1.967
44.254


−3.788
−1.129
44.326


−4.251
−0.975
44.406


















TABLE 2





X
Y
Z

















0.25
−1.208 
41.746


0.25
0
41.997


0.25 
−1.181 
40.993


0.25 
−1.234
42.499


0.25
−1.221
42.123


0.25
1.234 
42.499


0.323
1.411
42.493


0.25
1.208 
41.746


0.25 
−0.624 
41.495


0.25
0
41.495


0.25 
−0.633 
42.499


0.25
0.624 
40.993


0.302
1.24
42.773


0.25
0
40.993


0.25
1.181 
40.993


0.25
−1.195
41.37


0.25
0.624 
42.499


0.25
−0.624 
41.997


0.25
−0.624 
40.993


0.25
1.195
41.37


0.25 
−1.181
40.993


0.25
0
40.993


0.25
1.181
40.993


0.25
0
42.499


0.25
0.624
41.997


0.25
0.624
41.495


0.302
−1.24
42.773


0.25
1.221 
42.123


0.633
1.496
42.83


2.527
−1.928
43.371


2.509 
−0.635
43.37


0.941
1.251
43.247


0.446 
−1.453
41.766


0.429 
−1.439
41.513


1.73 
−1.254
43.309


0.449
−1.246
43.009


0.704
1.429 
43.105


0.341
−0.633
42.857


1.265
−1.737
42.85


0.902
−1.737 
42.481


0.523
1.55
41.745


2.527
1.928
43.371


1.696 
−1.558
43.136


0.532
1.856 
41.784


1.986
0.635 
43.329


1.076
1.593
42.677


0.782
−1.5
42.941


1.464 
−0.635
43.288


1.696
1.917
43.136


2.124
1.255
43.34


0.625
1.737
42.044


0.5
1.844 
41.509


0.534
−1.49
42.673


0.673
−1.25 
43.174


0.625
1.868
42.044


2.86
1.171 
43.378


4.424
−1.911
43.007


4.489
1.184 
43.209


2.86
0.39
43.378


3.21 
−1.041
43.349


3.191
−1.081
43.349


4.361
1.912
43.025


3.985
1.184
43.248


2.992 
−0.975
43.37


4.424 
−1.558
43.007


4.456
−1.34 
43.099


3.191
1.926
43.349


3.987
−0.975
43.293


3.485 
−0.975
43.332


4.361
−1.56
43.025


3.49
0.975 
43.332


3.779
1.34 
43.226


4.982
1.185
43.17


4.982 
−1.185
43.17


3.191
1.504 
43.349


4.982 
−0.975 
43.217


4.361
1.56
43.025


4.85 
−1.353 
43.054


3.191
1.171
43.349


3.49
−0.975 
43.332


3.191
1.926
43.349


3.835
−1.203
43.25


4.493
−0.975
43.254


3.191
−1.926
43.349


4.796
1.578
42.956


3.989
−0.975
43.293


3.191 
−1.171
43.349


2.86
−1.171
43.378


3.989
0.975
43.293


3.786
1.921
43.224


3.835
1.203
43.25


3.779
−1.34
43.226


4.424
1.558 
43.007


3.985
−1.184
43.248


3.49
0
43.332


0.5
1.467 
42.013


0.592
0
43.128


1.004
1.493 
42.751


1.004
−1.493
42.751


1.654
−1.471
43.176


2.509
0.635
43.37


1.336
1.252
43.278


0.625
−1.868 
42.044


0.961
1.501 
42.989


2.096
−1.425
43.295


1.336
−1.252
43.278


0.782
1.5
42.941


1.37
1.602
42.933


0.323
1.384
41.74


1.73
1.254
43.309


0.5
−1.484 
42.491


1.341
1.432
43.202


1.076
−1.593
42.677


0.825
−1.582 
42.378


2.1
−1.924 
43.296


0.592
−0.633
43.128


0.673
1.25 
43.174


0.824
−1.883 
42.377


1.367
−1.908
42.93


2.509
−1.259
43.37


1.074
1.896
42.675


0.323
−1.411 
42.493


0.625
1.57 
42.044


1.37
−1.602
42.933


1.311
−1.502
43.017


0.323
−1.384
41.74


1.311
1.502 
43.017


1.696
−1.917
43.136


0.744
1.482
42.44


1.464
0.635
43.288


0.446
1.453 
41.766


1.367
1.908
42.93


2.124
−1.255
43.34


0.502
1.425
42.954


1.986
−0.635
43.329


0.704
−1.429
43.105


0.323
1.398
42.117


1.464
0
43.288


0.532
−1.856 
41.784


2.096
1.425 
43.295


2.509
1.259
43.37


4.982
0.975
43.217


3.786
1.504
43.224


4.424
1.911
43.007


4.493
0.975
43.254


2.992
0.975
43.37


4.796
−1.578
42.956


2.992
0
43.37


3.191
−1.504
43.349


2.86
−1.928
43.378


3.987
0
43.293


4.484
0
43.255


4.796
−1.909
42.956


3.786
−1.504
43.224


4.85
1.353
43.054


4.796
1.909
42.956


3.191
1.081
43.349


4.361
−1.912
43.025


3.191
−1.926
43.349


2.86
−0.39
43.378


3.21
1.041
43.349


4.456
1.34 
43.099


2.86
1.928
43.378


3.786
−1.921
43.224


4.982
0
43.217


4.489
−1.184
43.209


0.799
−1.305
39.905


0.5
−1.598
41.147


0.5
−1.828
41.147


0.637
1.152
39.988


0.907
0.598
39.753


0.487
−1.408
40.601


0.538
−1.598
40.712


1.245
−0.359
39.187


0.295
−1.171 
40.63


0.505
−1.518
40.988


0.613
−1.379
40.236


0.907
0
39.753


0.295
1.171
40.63


0.678
1.304
40.019


0.426
−1.161
40.288


0.651
1.789
40.291


0.836
1.771
39.896


0.673
−1.465
40.234


0.538
−1.808
40.712


0.937
1.145 
39.72


1.04
1.076
39.541


0.323
1.371
41.364


0.836
−1.368
39.896


0.474
1.313
40.308


0.673
1.465
40.234


0.5
−1.471
42.114


0.5
−1.535 
41.509


1.735
−1.433 
43.233


0.941
−0.633 
43.247


0.902
1.737
42.481


2.509
0
43.37


1.696
1.558
43.136


0.947
1.431
43.171


0.341
0.633
42.857


0.523
−1.55
41.745


0.5
−1.467
42.013


0.941
0.633
43.247


2.1
1.924
43.296


1.696
1.737
43.136


0.961
−1.501
42.989


0.592
0.633
43.128


1.341
−1.432 
43.202


0.5
1.484
42.491


0.625
−1.737 
42.044


1.696
−1.737 
43.136


0.824
1.883
42.377


2.077
1.376
43.305


0.947
−1.431
43.171


0.449
1.246
43.009


0.744
−1.482
42.44


2.077
−1.376 
43.305


0.633
−1.496
42.83


0.502
−1.425
42.954


0.323
−1.398 
42.117


1.074
−1.896 
42.675


0.341
0
42.857


0.941
0
43.247


1.986
0
43.329


1.654
1.471
43.176


0.534
1.49
42.673


0.825
1.582
42.378


0.369
1.418
42.74


0.625
−1.868
42.044


0.625
−1.57
42.044


0.369
−1.418
42.74


1.265
1.737
42.85


1.735
1.433
43.233


0.625
1.868
42.044


0.5
1.535
41.509


0.429
1.439
41.513


0.941
−1.251
43.247


0.555 
−0.598 
40.087


0.487
1.408 
40.601


1.245
0.359
39.187


0.679
−1.307 
40.021


0.426
1.161 
40.288


0.651 
−1.598
40.291


1.245
1.076
39.187


0.303
1.335
40.988


0.505
1.518
40.988


0.799
1.305 
39.905


0.555
0.598 
40.087


0.328
0
40.515


1.04
0.359
39.541


0.836
−1.598
39.896


0.349
−1.326
40.638


0.328
0.598
40.515


1.04
−1.076 
39.541


0.5
1.598 
41.147


1.245
−1.74
39.187


0.937
−0.573
39.72


0.637 
−1.152 
39.988


0.538
1.598
40.712


0.555
0
40.087


0.432
1.422
40.985


0.937 
−1.145
39.72


0.538
1.808
40.712


1.04
1.756
39.541


0.651 
−1.789 
40.291


0.937
0.573
39.72


0.323
−1.371
41.364


0.56
1.503
40.603


0.651
1.598
40.291


0.432
−1.422 
40.985


1.245 
−1.076 
39.187


1.04
−1.756
39.541


0.56 
−1.503 
40.603


0.836
1.368
39.896


0.5
1.828
41.147


0.907
−0.598
39.753


0.328 
−0.598 
40.515


1.245
1.74
39.187


0.613
1.379 
40.236


0.937
0
39.72


0.305
−1.338 
40.988


0.476 
−1.316
40.309


0.836
1.598
39.896


0.5 
−1.844 
41.509


0.836 
−1.771 
39.896


1.04
−0.359 
39.541


0.347
1.324
40.637


















TABLE 3





X
Y
Z

















−4.365
−1.856
41.684


−1.174
1.775
39.893


−2.168
1.124
41.368


−4.019
1.856
41.685


−3.7
−0.864
41.672


−0.971
−0.367
40.123


−1.425 
1.823
40.959


−4.811
−1.045
41.735


−1.785
−0.375
41.185


−4.813
−1.451
41.735


−3.043
0
41.603


−1.425 
0.375
40.959


−4.452
−0.688
41.812


−2.57 
1.848
41.505


−2.168
1.841
41.368


−3.512
0
41.673


−3.705
0.845
41.675


−4.462
−0.858
41.783


−1.25
1.064
39.847


−1.785
0.375
41.185


−1.174
−1.775
39.893


−1.25
−1.064
39.847


−4.019 
1.341
41.685


−1.094
−0.367
40.693


−4.039
−0.92
41.692


−3.373
−0.767
41.646


−1.174
1.1
39.893


−4.921
0.688
41.881


−3.986
−0.858
41.713


−4.462
0.858
41.783


−0.94 
0.367
40.428


−4.374
0.991
41.697


−4.032 
0.948
41.685


−3.329
1.854
41.64


−2.986
−0.375
41.594


−4.813
−1.858
41.735


−4.365 
1.442
41.684


−4.457
0.688
41.813


−3.043
0
41.603


−3.986 
0.858
41.713


−0.971 
0.367
40.123


−4.365 
1.027
41.684


−4.799
1.007
41.747


−4.365
−1.027
41.684


−3.043
−0.688
41.603


−1.785
−1.124
41.185


−2.986
0.375
41.594


−1.174
−1.1 
39.893


−0.94 
−0.367
40.428


−3.705
−0.845
41.675


−2.986
−1.852
41.594


−1.425 
1.124
40.959


−3.982 
0.688
41.742


−4.535
1.006
41.708


−1.25
−1.773
39.847


−3.7
0.864
41.672


−3.982
−0.688
41.742


−0.971
1.785
40.123


−4.921
0
41.881


−4.811 
1.045
41.735


−1.094 
1.811
40.693


−0.94
1.799
40.428


−3.043 
0.688
41.603


−1.785
−1.833
41.185


−1.425
−0.375
40.959


−2.986
1.852
41.594


−2.57
−0.375
41.505


−0.94
−1.1 
40.428


−1.785
1.124
41.185


−3.673
−1.341 
41.67


−1.094 
0.375
40.693


−4.537
1.045
41.694


−3.982
−0.688
41.742


−3.329
−1.854
41.64


−4.039
0.92 
41.692


−2.168 
0.375
41.368


−4.799
−1.007
41.747


−4.032
−0.948
41.685


−1.25
1.773
39.847


−3.673
−1.855
41.67


−3.673
1.341
41.67


−3.982 
0.688
41.742


−3.329
1.341
41.64


−0.971
1.1 
40.123


−4.452
0
41.812


−3.982
0
41.742


−4.813
1.858
41.735


−1.25
0.355 
39.847


−3.371
0.777 
41.644


−4.365
1.856
41.684


−3.329
−1.341
41.64


−4.019 
−1.856
41.685


−4.374
−0.991
41.697


−0.94
1.1 
40.428


−1.785 
1.833 
41.185


−4.537
1.451
41.694


−0.971
−1.785
40.123


−4.535
−1.006
41.708


−1.425 
−1.823
40.959


−3.512
−0.688
41.673


−1.174
−0.367
39.893


−4.537 
−1.856
41.694


−3.373
0.767 
41.646


−4.537
−1.045
41.694


−4.537 
−1.442
41.694


−2.57 
0.375 
41.505


−3.371 
−0.777
41.644


−3.673
1.855
41.67


−2.57 
−1.848
41.505


−4.537 
1.856 
41.694


−2.57
1.124 
41.505


−4.921
−0.688
41.881


−4.813 
1.451 
41.735


−1.094
−1.124
40.693


−0.94
−1.799
40.428


−1.425
−1.124
40.959


−2.168 
−1.124
41.368


−2.57 
−1.124
41.505


−1.174 
0.367 
39.893


−1.094
1.124 
40.693


−3.512
0.688 
41.673


−4.365
−1.442
41.684


−1.094
−1.811
40.693


−2.168
−0.375
41.368


−1.25 
−0.355
39.847


−2.168
−1.841
41.368


−4.019
−1.341
41.685


−0.971
−1.1 
40.123


−2.986 
−1.127
41.594


−2.986 
1.127 
41.594


















TABLE 4





X
Y
Z

















2.448
1.1
40.718


2.758
0.367
40.698


2.758
−0.367
40.698


2.448
−1.1
40.718


3.066
0.367
40.67


4.612
−1.795
40.326


3.183
−0.688
40.656


3.655
0.688
40.601


3.183
0
40.656


3.183
−0.688
40.656


1.244
−0.355
39.851


4.123
−0.883
40.505


1.049
1.785
40.119


3.68
1.304
40.586


1.517
−1.808
40.615


1.823
−0.367
40.682


4.616
−1.038
40.343


4.612
1.421
40.326


4.612
1.08
40.326


3.183
−0.688
40.656


1.052
1.095
40.353


3.683
−0.79
40.587


4.384
1.044
40.388


1.049
−1.785
40.119


4.401
1.006
40.398


4.384
1.304
40.388


3.374
1.808
40.632


3.066
1.81
40.67


2.135
0.367
40.716


1.823
0.367
40.682


3.066
1.1
40.67


4.126
−0.688
40.545


3.655
0
40.601


4.384
1.797
40.388


2.135
−0.367
40.716


1.22
−0.367
40.516


1.13
0.361
39.973


3.374
−1.1
40.632


2.448
−0.367
40.718


4.126
0.688
40.545


1.517
1.808
40.615


3.183
0.688
40.656


1.823
1.811
40.682


4.934
1.437
40.279


5.07
−0.688
40.434


1.22
−1.1
40.516


1.517
−0.367
40.615


4.924
1.046
40.299


4.924
−1.046
40.299


3.374
1.1
40.632


4.123
0.883
40.505


3.68
1.1
40.586


1.051
1.796
40.353


4.934
−1.792
40.279


3.183
0
40.656


3.183
0.688
40.656


4.401
−1.006
40.398


3.183
0.688
40.656


4.155
−1.304
40.471


4.155
1.304
40.471


3.68
−1.304
40.586


1.051
−1.796
40.353


2.448
−1.1
40.718


2.448
0.367
40.718


4.048
0.894
40.51


3.655
−0.688
40.601


4.598
−0.688
40.49


4.039
0.919
40.506


3.68
1.806
40.586


4.128
−0.688
40.545


4.934
1.792
40.279


4.601
−0.883
40.449


1.049
−1.084
40.119


2.135
−1.812
40.716


2.448
0.367
40.718


3.68
−1.1
40.586


2.448
1.1
40.718


1.823
1.1
40.682


4.612
−1.421
40.326


1.052
−0.365
40.353


4.126
0
40.545


1.049
1.095
40.119


1.052
0.365
40.353


4.048
−0.894
40.51


4.601
0.883
40.449


2.448
1.812
40.718


4.039
−0.919
40.506


2.758
−1.811
40.698


1.22
−1.803
40.516


2.758
−1.1
40.698


3.92
−1.804
40.537


3.683
0.79
40.587


1.049
0.365
40.119


5.07
0.688
40.434


1.22
1.095
40.516


1.13
1.084
39.973


2.448
−1.812
40.718


3.92
1.804
40.537


4.155
1.801
40.471


3.92
1.304 
40.537


1.052
−1.095
40.353


4.155
−1.801
40.471


4.598
0.688
40.49


1.22
0.365 
40.516


2.448
−0.367
40.718


3.374
−1.808 
40.632


2.135
−1.1
40.716


4.612
−1.08 
40.326


1.244
0.361 
39.851


1.13
−1.084 
39.973


5.07
0.688
40.434


2.758
1.811 
40.698


1.517
0.367 
40.615


1.517
−1.1
40.615


1.517
1.1
40.615


4.128
0.688
40.545


1.244
1.084 
39.851


4.932
−1.09 
40.279


4.598
0
40.49


3.68
0.802
40.586


3.066
−1.81
40.67


4.384
−1.304 
40.388


1.823
−1.811 
40.682


2.758
1.1
40.698


4.932
1.09
40.279


3.68
−1.806 
40.586


1.244
1.773 
39.851


4.384
−1.044
40.388


3.92
−1.304 
40.537


1.823
−1.1 
40.682


2.135
1.1
40.716


1.049
−0.361 
40.119


4.384
−1.797
40.388


5.07
−0.688
40.434


1.244
−1.773
39.851


2.135
1.812 
40.716


4.616
1.038
40.343


1.13
−0.361 
39.973


3.066
−1.1
40.67


1.244
−1.084 
39.851


5.07
0
40.434


1.22
1.803
40.516


3.68
−0.802
40.586


4.612
1.795 
40.326


4.934
−1.437 
40.279


3.066
−0.367
40.67


















TABLE 5





X
Y
Z

















−2.022
1.507
38.867


−1.407
0
38.289


−1.407
−1.484
38.289


−1.25
0
37.004


−4.76
0
39.625


−1.25
1.434
37.004


−4.76
1.537
39.625


−1.164
0
37.401


−3.894
−1.531
39.487


−3.894
0
39.487


−3.298
1.527
39.363


−2.356
−1.514
39.054


−2.356
0
39.054


−1.218
1.468
37.864


−1.713
0
38.639


−1.713
1.498
38.639


−2.356
1.514
39.054


−2.712
0
39.196


−1.164
−1.45
37.401


−4.497
0
39.566


−2.022
−1.507
38.867


−1.164
1.45
37.401


−0.026
0.001
37.864


−1.218
0
37.864


−1.25
−1.434
37.004


−3.298
−1.527
39.393


−3.894
1.531
39.487


−3.298
0
39.363


−2.712
1.52
39.196


−4.76
−1.537
39.625


−1.407
1.484
38.289


−4.497
1.535
39.566


−1.218
−1.468
37.864


−4.497
−1.535
39.566


−2.022
0
38.867


−2.712
−1.52
39.196


−1.713
−1.498
38.639


















TABLE 6





X
Y
Z

















4.163
1.465
37.805


2.873
−1.473 
37.997


4.724
−0.725 
37.713


2.366 
−1.473
37.989


3.771
1.468
37.882


4.163
0.992 
37.805


3.378
−0.992
37.948


5.234
−1.193 
37.461


5.33
−0.66 
37.616


4.192
0.66 
37.809


6.034
1.055
37.441


6.034 
−1.451 
37.441


4.552
−1.149 
37.718


5.234
1.452 
37.461


4.728
0.66 
37.716


5.682
0
37.603


5.33
0
37.616


5.564
−0.944
37.519


1.25
1.432 
36.968


1.548
1.465
37.807


3.378
0.992
37.948


1.165 
−1.445 
37.286


3.656
0.66 
37.903


6.034
0.66
37.589


6.034
−0.66
37.589


2.366
0
37.989


5.483
−1.303 
37.304


2.873
0
37.997


5.329
0.856 
37.576


3.378
1.471 
37.948


5.213
1.051
37.476


6.034
−0.98 
37.474


5.088 
−1.193
37.549


3.378
0
37.948


5.799
−0.66
37.598


5.75
−1.443
37.244


2.873
1.473 
37.997


1.548
0
37.807


4.931
−1.193
37.613


5.483
−1.446
37.304


6.034
−0.66 
37.589


5.483 
1.446 
37.304


2.366
1.473
37.989


5.75
−1.303
37.244


5.565
0.66 
37.607


3.656
0
37.903


6.034
0
37.589


3.378 
−1.471
37.948


1.289
1.457 
37.592


1.864 
−1.47 
37.924


4.552
1.462 
37.718


4.163 
−0.992
37.805


6.034
0
37.589


3.771
−1.468
37.882


4.185
0.725
37.806


4.552 
−1.462
37.718


4.724
0.725 
37.713


6.034
1.451 
37.441


5.483
1.303 
37.304


5.088 
1.455
37.549


4.728
0
37.716


1.165 
1.445 
37.286


5.564 
0.944
37.519


3.771
0.992 
37.882


5.234 
−1.452 
37.461


4.931
1.458 
37.613


5.234
1.193
37.461


4.163 
−1.465 
37.805


4.552 
−0.836 
37.718


1.289
−1.457
37.592


5.799
0.66
37.598


6.034
0.83
37.559


4.552
0.836 
37.718


5.088 
−1.455
37.549


4.931 
−1.458 
37.613


4.931
0.927
37.613


5.75
1.443
37.244


6.034
0.66 
37.589


5.079
−0.983 
37.553


1.165
0
37.286


6.034
−0.83 
37.559


4.931
1.193
37.613









At this point it should be understood that the exemplary embodiments describe near flow path seal members that prevent or at least substantially limit fluid exchange between a gas path and a wheel space in a turbomachine. The near flow path seal members include surface sections that are shaped to provide desired clearances for moving components while at the same time ensuring sealing properties. It should also be understood that the particular points that define the surface section can vary and includes a tolerance of up to ±0.250 for each surface section.
While the invention has been described in detail in connection with only a limited number of embodiments, it should be readily understood that the invention is not limited to such disclosed embodiments. Rather, the invention can be modified to incorporate any number of variations, alterations, substitutions or equivalent arrangements not heretofore described, but which are commensurate with the spirit and scope of the invention. Additionally, while various embodiments of the invention have been described, it is to be understood that aspects of the invention may include only some of the described embodiments. Accordingly, the invention is not to be seen as limited by the foregoing description, but is only limited by the scope of the appended claims.

## Claims

1. A near flow path seal member for a turbomachine comprising:
a seal body including a seal support member having a first end portion that extends to a second end portion through an intermediate portion;
an arm member extending from the first end portion of the seal body, the arm member having a first end that extends to a second end to define an axial dimension of the arm member, a first edge that extends to a second, opposing edge to define a circumferential dimension of the arm member, and a surface having a profile that establishes a thickness variation of the arm member in each of the axial dimension and the circumferential dimension;
another arm member extending from the first end portion of the seal body, the another arm member having a first end that extends to a second end to define an axial dimension of the another arm member, a first edge that extends to a second, opposing edge to define a circumferential dimension of the another arm member, and another surface having a profile that establishes a thickness variation of the another arm member in each of the axial dimension and the circumferential dimension, wherein the near flow path seal member is configured and disposed to seal between one of a first stage and a second stage, a second stage and a third stage, and a third stage and a fourth stage of a turbine.

2. The near flow path seal member according to claim 1, wherein the arm member comprises an upstream arm member and the another arm member comprises a downstream arm member.

3. The near flow path seal member according to claim 1, wherein the near flow path seal member is configured and disposed to seal between a first stage and a second stage of a turbine.

4. The near flow path seal member according to claim 1, wherein the profile of the surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 1, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the surface.

5. The near flow path seal member according to claim 1, wherein the profile of the another surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 2, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the another surface.

6. The near flow path seal member according to claim 1, wherein the near flow path seal member is configured and disposed to seal between a second and a third stage of a turbine.

7. The near flow path seal member according to claim 6, wherein the profile of the surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 3, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the surface.

8. The near flow path seal member according to claim 6, wherein the profile of the another surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 4, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the another surface.

9. The near flow path seal member according to claim 1, wherein the near flow path seal member is configured and disposed to seal between a third stage and a fourth stage of a turbine.

10. The near flow path seal member according to claim 9, wherein the profile of the surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 5, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the surface.

11. The near flow path seal member according to claim 9, wherein the profile of the another surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 6, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the another surface.

12. A turbomachine comprising:
a compressor portion;
a combustor assembly fluidly connected to the compressor portion;
a turbine portion fluidly connected to the combustor assembly and mechanically linked to the compressor portion, the turbine portion including a first stage, a second stage, a third stage, and a fourth stage; and
a near flow path seal member positioned between one of the first, second, third, and fourth stages of the turbine portion, the near flow path seal member comprising:
a seal body including a seal support member having a first end portion that extends to a second end portion through an intermediate portion; and
an arm member extending from the first end portion of the seal body, the arm member having a first end that extends to a second end to define an axial dimension of the arm member, a first edge that extends to a second, opposing edge to define a circumferential dimension of the arm member, and a surface having a profile that establishes a thickness variation of the arm member in each of the axial dimension and the circumferential dimension
another arm member extending from the first end portion of the seal body, the another arm member having a first end that extends to a second end to define an axial dimension of the another arm member, a first edge that extends to a second, opposing edge to define a circumferential dimension of the another arm member, and another surface having a profile that establishes a thickness variation of the another arm member in each of the axial dimension and the circumferential dimension, wherein the near flow path seal member is configured and disposed to seal between one of a first stage and a second stage, a second stage and a third stage, and a third stage and a fourth stage of the turbine portion.

13. The turbomachine according to claim 12, wherein the near flow path seal is positioned between the first and second stage of the turbine portion and the profile of the surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 1, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the surface.

14. The turbomachine according to claim 12, wherein the near flow path seal is positioned between the first and second stage of the turbine portion and the profile of the another surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 2, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the another surface.

15. The turbomachine according to claim 12, wherein the near flow path seal is positioned between the second and third stage of the turbine portion and the profile of the surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 3, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the surface.

16. The turbomachine according to claim 12, wherein the near flow path seal is positioned between the second and third stage of the turbine portion and the profile of the another surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 4, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the another surface.

17. The turbomachine according to claim 12, wherein the near flow path seal is positioned between the third and fourth stage of the turbine portion and the profile of the surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 5, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the surface.

18. The turbomachine according to claim 12, wherein the near flow path seal is positioned between the third and fourth stage of the turbine portion and the profile of the another surface is substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in TABLE 6, and wherein X, Y, and Z are distances in inches which, when connected by smooth continuing arcs, define the profile of the another surface.