Steam turbine rotating blade for a low pressure section of a steam turbine engine
A steam turbine rotating blade (20) for a low pressure section of a steam turbine engine (10) is disclosed. The steam turbine rotating blade (20) includes an airfoil portion (42). A root section (44) is attached to one end of the airfoil portion (42). A dovetail section (40) projects from the root s...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | A steam turbine rotating blade (20) for a low pressure section of a steam turbine engine (10) is disclosed. The steam turbine rotating blade (20) includes an airfoil portion (42). A root section (44) is attached to one end of the airfoil portion (42). A dovetail section (40) projects from the root section (44), wherein the dovetail section (40) includes a skewed axial entry dovetail (40). A tip section (46) is attached to the airfoil portion (42) at an end opposite from the root section (44). A cover (48) is integrally formed as part of the tip section (46). The cover (48) comprises a first flat section (52), a second flat section (54), and a depression section (56) located laterally between the first flat section (52) and second flat section (54). The depression section (56) is located below the first flat section (52) at a first end where the first flat section (52) and depression section (56) are contiguous. The depression section (56) rises above to the second flat section (54) at a second end where the second flat section (54) and depression section (56) are contiguous. The second flat section (54) is raised above the first flat section (52). The cover (48) is positioned at an angle relative to the tip section (46), wherein the angle ranges from about 10 degrees to about 30 degrees. |
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