Turbine bucket
First Claim
1. 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 ±
- 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,
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0 Petitions
Accused Products
Abstract
The present invention is a turbine bucket for at the low pressure last stage of a steam turbine and in which the adjacent blades are connected without using a connecting member at a blade intermediate portion. A turbine bucket of the present invention is formed that the blade sectional configuration is twisted from a blade root portion to a blade tip side, and when assuming two axial directions in a blade section of the bucket on 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 predetermined heights from the blade root portion of the turbine bucket are formed in a range of ±0.3 mm from respective points defining blade section configurations.
40 Citations
20 Claims
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1. 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 ±
- 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, - View Dependent Claims (2, 3, 4)
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
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5. 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 ±
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
the blade section at height 0 mm from the blade root portion of the turbine bucket being as follows,
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
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6. 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 ±
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
the blade section at height 38 mm from the blade root portion of the turbine bucket being as follows,
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
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7. 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 ±
- 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,
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
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8. 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 ±
- 0.15 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,
- 0.15 mm from series of points defining blade section configurations as defined in the following charts;
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9. 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 ±
- 0.15 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,
- 0.15 mm from series of points defining blade section configurations as defined in the following charts;
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10. 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 ±
- 0.3 mm from series of points defining blade section configurations as defined in the following charts, and further being provided with a shroud which is formed at a tip portion of the bucket while being extended in the back side and in the front side of the bucket;
the blade section at the blade root portion of the turbine bucket being as follows, - View Dependent Claims (11)
- 0.3 mm from series of points defining blade section configurations as defined in the following charts, and further being provided with a shroud which is formed at a tip portion of the bucket while being extended in the back side and in the front side of the bucket;
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12. 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 ±
- 0.3 mm from series of points defining blade section configurations as defined in the following charts, and further being provided with a shroud which is formed at a tip portion of the bucket while being extended in the back side and in the front side of the bucket;
the blade section at the blade root portion of the turbine bucket being as follows,
- 0.3 mm from series of points defining blade section configurations as defined in the following charts, and further being provided with a shroud which is formed at a tip portion of the bucket while being extended in the back side and in the front side of the bucket;
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13. 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 ±
- 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, - View Dependent Claims (14)
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
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15. 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 ±
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
the blade section at height 0 mm from the blade root portion of the turbine bucket being as follows,
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
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16. 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 ±
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
the blade section at height 38 mm from the blade root portion of the turbine bucket being as follows,
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
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17. 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 ±
- 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,
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
-
18. 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 ±
- 0.15 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,
- 0.15 mm from series of points defining blade section configurations as defined in the following charts;
-
19. 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 ±
- 0.15 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,
- 0.15 mm from series of points defining blade section configurations as defined in the following charts;
-
20. 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 ±
- 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,
- 0.3 mm from series of points defining blade section configurations as defined in the following charts;
Specification