Patent ID: 6579066
Filing Date: 2003-06-17
Classification: F01D,F05D,Y10S

Abstract:
A turbine bucket which is formed in such a manner that the blade sectional configuration is twisted from a blade root portion to a blade tip side, characterized in that when assuming two axial directions in a blade section of the bucket along horizontal plane and taking one axial direction as X axis and the other axial direction perpendicular to X axis as Y axis, the blade sections at the following heights from the blade root portion of the turbine bucket are formed in a range of Â±0.3 mm from series of points defining blade section configurations as defined in the following charts;the blade section at the blade root portion of the turbine bucket being as follows, back sidefront sideNo.XYXYâ€‚153.99âˆ’24.7152.62âˆ’25.77â€‚250.02âˆ’17.1747.80âˆ’20.24â€‚345.14âˆ’10.1842.25âˆ’15.44â€‚439.48âˆ’3.8236.20âˆ’11.29â€‚533.071.8129.78âˆ’7.73â€‚625.976.5223.07âˆ’4.77â€‚718.2910.2116.11âˆ’2.45â€‚810.1512.748.95âˆ’0.83â€‚91.7314.061.66âˆ’0.0310âˆ’6.7913.87âˆ’5.68âˆ’0.1211âˆ’15.1612.28âˆ’12.95âˆ’1.0912âˆ’23.159.32âˆ’20.07âˆ’2.8713âˆ’30.515.02âˆ’26.93âˆ’5.4814âˆ’37.09âˆ’0.41âˆ’33.39âˆ’8.9515âˆ’42.73âˆ’6.79âˆ’39.49âˆ’13.0416âˆ’47.73âˆ’13.70âˆ’45.16âˆ’17.6917âˆ’52.03âˆ’21.05âˆ’50.35âˆ’22.87the blade section at height 106 mm from the blade root portion of the turbine bucket being as follows, back sidefront sideNo.XYXYâ€‚148.84âˆ’14.2247.62âˆ’15.33â€‚245.04âˆ’7.2442.70âˆ’10.44â€‚339.98âˆ’1.1336.97âˆ’6.55â€‚433.934.0330.70âˆ’3.59â€‚527.178.1824.12âˆ’1.42â€‚619.8311.2017.340.03â€‚712.1013.0010.460.77â€‚84.1613.303.530.83â€‚9âˆ’3.6912.19âˆ’3.360.1110âˆ’11.299.89âˆ’10.12âˆ’1.4211âˆ’18.466.49âˆ’16.65âˆ’3.7312âˆ’25.092.12âˆ’22.87âˆ’6.7813âˆ’31.11âˆ’3.05âˆ’28.72âˆ’10.5014âˆ’36.37âˆ’8.99âˆ’34.16âˆ’14.7915âˆ’41.17âˆ’15.32âˆ’39.16âˆ’19.5916âˆ’45.44âˆ’22.01âˆ’43.72âˆ’24.8017âˆ’49.16âˆ’29.01âˆ’47.82âˆ’30.39the blade section at height 215 mm from the blade root portion of the turbine bucket being as follows, back sidefront sideNo.XYXYâ€‚144.68âˆ’3.5943.82âˆ’4.91â€‚239.781.8338.27âˆ’1.43â€‚334.016.3032.231.10â€‚427.559.7025.852.57â€‚520.5811.8919.333.17â€‚613.3312.8212.783.13â€‚76.0312.596.282.34â€‚8âˆ’1.0610.87âˆ’0.070.75â€‚9âˆ’7.798.02âˆ’6.25âˆ’1.4110âˆ’14.024.23âˆ’12.15âˆ’4.2511âˆ’19.83âˆ’0.21âˆ’17.68âˆ’7.7512âˆ’25.17âˆ’5.19âˆ’22.83âˆ’11.8013âˆ’29.98âˆ’10.68âˆ’27.66âˆ’16.2214âˆ’34.41âˆ’16.48âˆ’32.18âˆ’20.9515âˆ’38.43âˆ’22.57âˆ’36.40âˆ’25.9616âˆ’42.01âˆ’28.94âˆ’40.29âˆ’31.2317âˆ’45.13âˆ’35.54âˆ’43.84âˆ’36.73the blade section at height 340 mm from the blade root portion of the turbine bucket being as follows, back sidefront sideNo.XYXYâ€‚137.6913.9737.8012.45â€‚231.6416.2231.7912.04â€‚325.2116.7325.8511.01â€‚418.7616.2720.029.47â€‚512.4414.9114.347.48â€‚66.3712.708.795.11â€‚70.559.863.422.39â€‚8âˆ’4.926.42âˆ’1.69âˆ’0.80â€‚9âˆ’9.962.37âˆ’6.66âˆ’4.2210âˆ’14.57âˆ’2.17âˆ’11.36âˆ’8.0011âˆ’18.80âˆ’7.07âˆ’15.71âˆ’12.1612âˆ’22.72âˆ’12.21âˆ’19.74âˆ’16.6513âˆ’26.37âˆ’17.55âˆ’23.50âˆ’21.3514âˆ’29.70âˆ’23.10âˆ’27.08âˆ’26.2115âˆ’32.68âˆ’28.84âˆ’30.43âˆ’31.2216âˆ’35.38âˆ’34.72âˆ’33.57âˆ’36.3617âˆ’37.79âˆ’40.72âˆ’36.49âˆ’41.64the blade section at height 470 mm from the blade root portion of the turbine bucket being as follows, back sidefront sideNo.XYXYâ€‚126.2525.5227.1224.37â€‚220.9924.0723.2820.71â€‚316.0421.6919.2417.22â€‚411.4218.7015.1213.81â€‚57.0715.2911.0610.34â€‚63.0011.547.136.71â€‚7âˆ’0.827.513.352.92â€‚84.373.24âˆ’0.27âˆ’1.03â€‚9âˆ’7.72âˆ’1.20âˆ’3.72âˆ’5.1510âˆ’10.76âˆ’5.86âˆ’7.04âˆ’9.3711âˆ’13.58âˆ’10.66âˆ’10.18âˆ’13.7312âˆ’16.24âˆ’15.55âˆ’13.16âˆ’18.2113âˆ’18.73âˆ’20.54âˆ’15.96âˆ’22.8014âˆ’21.05âˆ’25.61âˆ’18.60âˆ’27.4915âˆ’23.20âˆ’30.75âˆ’21.12âˆ’32.2516âˆ’25.17âˆ’35.97âˆ’23.50âˆ’37.0817âˆ’26.96âˆ’41.26âˆ’25.76âˆ’41.97the blade section at height 589 mm from the blade root portion of the turbine bucket being as follows, back sidefront sideNo.XYXYâ€‚117.3029.7018.4428.95â€‚213.5826.7216.8624.50â€‚310.4523.1314.4820.42â€‚47.6419.2811.8016.53â€‚55.0415.289.1212.65â€‚62.6311.176.528.71â€‚70.366.984.004.72â€‚8âˆ’1.792.731.550.68â€‚9âˆ’3.90âˆ’1.55âˆ’0.81âˆ’3.4110âˆ’5.95âˆ’5.85âˆ’3.09âˆ’7.5411âˆ’7.93âˆ’10.18âˆ’5.31âˆ’11.7112âˆ’9.86âˆ’14.54âˆ’7.47âˆ’15.9013âˆ’11.72âˆ’18.93âˆ’9.59âˆ’20.1314âˆ’13.51âˆ’23.34âˆ’11.64âˆ’24.3815âˆ’15.24âˆ’27.78âˆ’13.64âˆ’28.6516âˆ’16.90âˆ’32.25âˆ’15.57âˆ’32.9617âˆ’18.49âˆ’36.74âˆ’17.44âˆ’37.30the blade section at height 660.4 mm from the blade root portion of the turbine bucket being as follows, back sidefront sideNo.XYXYâ€‚115.2930.2116.3829.26â€‚212.0627.2015.3325.01â€‚39.3923.6813.5321.03â€‚47.1819.8611.3917.22â€‚55.2315.899.1713.45â€‚63.3711.896.999.66â€‚71.487.904.885.83â€‚8âˆ’0.333.882.772.00â€‚9âˆ’2.14âˆ’0.150.71âˆ’1.8510âˆ’3.94âˆ’4.19âˆ’1.29âˆ’5.7411âˆ’5.71âˆ’8.23âˆ’3.27âˆ’9.6412âˆ’7.44âˆ’12.29âˆ’5.22âˆ’13.5513âˆ’9.14âˆ’16.37âˆ’7.16âˆ’17.4714âˆ’10.80âˆ’20.46âˆ’9.07âˆ’21.4115âˆ’12.44âˆ’24.56âˆ’0.94âˆ’25.3616âˆ’14.02âˆ’28.68âˆ’12.76âˆ’29.3317âˆ’15.55âˆ’32.82âˆ’14.54âˆ’33.33.