CN201103423Y - Longitudinal tree type R blade root used for intermediate pressure cylinder blade of macrotype full rotary speed turbine - Google Patents
Longitudinal tree type R blade root used for intermediate pressure cylinder blade of macrotype full rotary speed turbine Download PDFInfo
- Publication number
- CN201103423Y CN201103423Y CNU200720117562XU CN200720117562U CN201103423Y CN 201103423 Y CN201103423 Y CN 201103423Y CN U200720117562X U CNU200720117562X U CN U200720117562XU CN 200720117562 U CN200720117562 U CN 200720117562U CN 201103423 Y CN201103423 Y CN 201103423Y
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- China
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- tooth
- blade root
- blade
- working surface
- pressure cylinder
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Abstract
The utility model discloses an R blade root of a vertical tree type used in the blades of a pressure cylinder in a large full-speed turbine, relating to the blade root used in the blades of the pressure cylinder in the turbine, which solves the problem that a fracture accident caused by improper selection of the blade roots used in the blades of the pressure cylinder in the past large full-speed turbine occurs when the turbine units are operated. The loading surface height (Ha) of an upper tooth (1) of the R blade root is 10.51mm and the loading surface height (Hb) of a middle tooth (2) is 8.81mm; while loading surface height (Hc) of a lower tooth (3) is 7.88mm; the width (D) of a first working face (4) is 21.24mm and the width (E) of a second working face (5) is 14.08mm; while the width (F) of a third working face (6) is 7.27mm. The R blade root reasonably determines the sizes of the blade roots and ensures the safety in operation.
Description
Technical field
The utility model relates to the blade root that a kind of Steam Turbine Through IP Admission blade uses.
Background technique
Along with the increase of thermal power steam turbine capacity, Large Steam Turbine Sets intermediate pressure cylinder blade all adopts R type blade root usually.At present, because that the blade root that large-scale full rotary speed steam turbine intermediate pressure cylinder blade is used is selected is improper, fracture accident can appear in the large-scale full rotary speed steam turbine unit that is in operation.
The model utility content
The purpose of this utility model is the problem of fracture accident can occur, the vertical tree type R blade root that provides a kind of large-scale full rotary speed steam turbine intermediate pressure cylinder blade to use for solving the existing large-scale full rotary speed steam turbine unit that is in operation.The utility model is by a pair of tooth 1 of going up, one centering tooth 2, a pair of lower tooth 3, first working surface 4, second working surface 5 and the 3rd working surface 6 are formed, the a pair of tooth 1 of going up is positioned at the top of blade root 7 and is symmetrically distributed in the both sides of blade root 7 with the center line of blade root 7, tooth 2 places a bottom of going up tooth 1 respectively in each, each lower tooth 3 places the bottom of a tooth 2 respectively, one centering tooth 2 and a pair of lower tooth 3 all are symmetrically distributed with the center line of blade root 7, first working surface 4 is between the top and last tooth 1 of blade root 7, second working surface 5 is between last tooth 1 and middle tooth 2, and the 3rd working surface 6 is between middle tooth 2 and lower tooth 3; The plane of load height H a of last tooth 1 is 10.51mm, the plane of load height H b of middle tooth 2 is 8.81mm, the plane of load height H c of lower tooth 3 is 7.88mm, the width D of first working surface 4 is 21.24mm, the width E of second working surface 5 is 14.08mm, the width F of the 3rd working surface 6 is 7.27mm, fillet R1, R2, R3, R4, R5, R6, R7 and the R8 of blade root 7 both sides are respectively 7.68mm, 2.54mm, 1.02mm, 1.27mm, 1.02mm, 1.27mm, 1.02mm and 2.64mm, the width B g of blade root 7 is 30.13mm, and the height H g of blade root 7 is 39.37mm.
The utlity model has following beneficial effect: the utility model has carried out Stress calculation to three teeth and the wheel rim of vertical tree type R blade root, reasonably determined the size of blade root, solve blade root that the past uses large-scale full rotary speed steam turbine intermediate pressure cylinder blade and selected the improper problem that causes unit to be in operation to occur fracture accident, guaranteed the Security of working procedure.The Security of design and high efficiency organically combine, and make the intermediate pressure cylinder blade that higher off design performance be arranged, thereby guarantee unit operation safely and efficiently under variable working condition.The utility model can be used as wet cooling gas turbine groups such as subcritical, overcritical, the peak regulation of 300MW～650MW, no matter is in Economy, strength vibration characteristic, static strength and guarantee that the safety reliability aspect of unit all reaches advanced level.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present utility model.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1, present embodiment is by a pair of tooth 1 of going up, one centering tooth 2, a pair of lower tooth 3, first working surface 4, second working surface 5 and the 3rd working surface 6 are formed, the a pair of tooth 1 of going up is positioned at the top of blade root 7 and is symmetrically distributed in the both sides of blade root 7 with the center line of blade root 7, tooth 2 places a bottom of going up tooth 1 respectively in each, each lower tooth 3 places the bottom of a tooth 2 respectively, one centering tooth 2 and a pair of lower tooth 3 all are symmetrically distributed with the center line of blade root 7, first working surface 4 is between the top and last tooth 1 of blade root 7, second working surface 5 is between last tooth 1 and middle tooth 2, and the 3rd working surface 6 is between middle tooth 2 and lower tooth 3; The plane of load height H a of last tooth 1 is 10.51mm, the plane of load height H b of middle tooth 2 is 8.81mm, the plane of load height H c of lower tooth 3 is 7.88mm, the width D of first working surface 4 is 21.24mm, the width E of second working surface 5 is 14.08mm, the width F of the 3rd working surface 6 is 7.27mm, chamfering R1, R2, R3, R4, R5, R6, R7 and the R8 of blade root 7 both sides are respectively 7.68mm, 2.54mm, 1.02mm, 1.27mm, 1.02mm, 1.27mm, 1.02mm and 2.64mm, the width B g of blade root 7 is 30.13mm, and the height H g of blade root 7 is 39.37mm.Blade is packed into to impeller steam output side direction by the steam admission side of impeller, and blade belongs to axial assembling, and blade root and wheel rim adopt axially locating pin fixing and locking, and making it blade root can not rotate.The described blade root of present embodiment is that the blade root of R2.6001 can be used on the clammy large-scale full rotary speed steam turbine group such as subcritical, overcritical, peak regulation that the variable power scope is the 300MW-650MW grade.
Claims (1)
1, the vertical tree type R blade root that a kind of large-scale full rotary speed steam turbine intermediate pressure cylinder blade uses, it is by a pair of tooth (1) of going up, one centering tooth (2), a pair of lower tooth (3), first working surface (4), second working surface (5) and the 3rd working surface (6) are formed, the a pair of tooth (1) of going up is positioned at the top of blade root (7) and is symmetrically distributed in the both sides of blade root (7) with the center line of blade root (7), tooth in each (2) places a bottom of going up tooth (1) respectively, each lower tooth (3) places the bottom of a tooth (2) respectively, one centering tooth (2) and a pair of lower tooth (3) all are symmetrically distributed with the center line of blade root (7), first working surface (4) is positioned between the top and last tooth (1) of blade root (7), second working surface (5) is arranged between tooth (1) and the tooth (2), and the 3rd working surface (6) is arranged between tooth (2) and the lower tooth (3); The plane of load height (Ha) that it is characterized in that tooth (1) is 10.51mm, the plane of load height (Hb) of middle tooth (2) is 8.81mm, the plane of load height (Hc) of lower tooth (3) is 7.88mm, the width (D) of first working surface (4) is 21.24mm, the width (E) of second working surface (5) is 14.08mm, the width (F) of the 3rd working surface (6) is 7.27mm, the chamfering (R1) of blade root (7) both sides, (R2), (R3), (R4), (R5), (R6), (R7) and (R8) be respectively 7.68mm, 2.54mm, 1.02mm, 1.27mm, 1.02mm, 1.27mm, 1.02mm and 2.64mm, the width (Bg) of blade root (7) is 30.13mm, and the height (Hg) of blade root (7) is 39.37mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720117562XU CN201103423Y (en) | 2007-12-03 | 2007-12-03 | Longitudinal tree type R blade root used for intermediate pressure cylinder blade of macrotype full rotary speed turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720117562XU CN201103423Y (en) | 2007-12-03 | 2007-12-03 | Longitudinal tree type R blade root used for intermediate pressure cylinder blade of macrotype full rotary speed turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201103423Y true CN201103423Y (en) | 2008-08-20 |
Family
ID=39950448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720117562XU Expired - Lifetime CN201103423Y (en) | 2007-12-03 | 2007-12-03 | Longitudinal tree type R blade root used for intermediate pressure cylinder blade of macrotype full rotary speed turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201103423Y (en) |
-
2007
- 2007-12-03 CN CNU200720117562XU patent/CN201103423Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080820 |
|
| CX01 | Expiry of patent term |