CN201103421Y - Longitudinal tree type P blade root used for intermediate pressure cylinder blade of macrotype full rotary speed turbine - Google Patents
Longitudinal tree type P blade root used for intermediate pressure cylinder blade of macrotype full rotary speed turbine Download PDFInfo
- Publication number
- CN201103421Y CN201103421Y CNU2007201175600U CN200720117560U CN201103421Y CN 201103421 Y CN201103421 Y CN 201103421Y CN U2007201175600 U CNU2007201175600 U CN U2007201175600U CN 200720117560 U CN200720117560 U CN 200720117560U CN 201103421 Y CN201103421 Y CN 201103421Y
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- tooth
- blade root
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- blade
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Abstract
The utility model relates to a P blade root of a vertical tree type used in the blades of a pressure cylinder in a large full-speed turbine, in particular to the blade root used in the blades of the pressure cylinder in the turbine, which solves the problem that the fracture accident of the blade roots occur in the turbine units when the existing large full-speed turbine is operated. The utility model consists of a pair of upper teeth (1) , a pair of middle teeth (2), a pair of lower teeth (3), a first working face (4), a second working face (5) and a third working face (6); the loading surface height Ha of the upper tooth (1) is 7.64mm and the loading surface height Hb of the middle tooth (2) is 6.59mm; while the loading surface height Hc of the lower tooth (3) is 5.36mm; the width D of the first working face (4) is 15.24mm and the width E of the second working face (5) is 10.87mm; while the width F of the third working face (6) is 6.29mm; the width Bg of the top of the blade root (7) is 22.31mm. The P blade root reasonably determines the sizes of the blade roots, ensures the safety in operation and is applicable to the blade roots of the large wet-cold and full-speed turbine units of sub-critical, supercritical and peak regulation type with a power changing range grade of 300MW to 650MW.
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 p type blade root usually.At present, because improper to the blade root selection of large-scale full rotary speed steam turbine intermediate pressure cylinder blade use, fracture accident can appear in large-scale full rotary speed steam turbine blade root in the unit when operation.
The model utility content
The purpose of this utility model is the problem of fracture accident can occur in order to solve existing large-scale full rotary speed steam turbine blade root in the unit when moving, and then the vertical tree type P blade root that provides a kind of large-scale full rotary speed steam turbine intermediate pressure cylinder blade to use.
The utility model is made up of a pair of tooth 1, a centering tooth 2, a pair of lower tooth 3, first working surface 4, second working surface 5 and the 3rd working surface 6 gone up, a pair of upward tooth 1, a centering tooth 2 and a pair of lower tooth 3 are symmetricly set on the left and right sides of blade root 7 from top to bottom successively along 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 7.64mm, the plane of load height H b of middle tooth 2 is 6.59mm, the plane of load height H c of lower tooth 3 is 5.36mm, the width D of first working surface 4 is 15.24mm, the width E of second working surface 5 is 10.87mm, the width F of the 3rd working surface 6 is 6.29mm, and the top width Bg of blade root 7 is 22.31mm, and the height H g of blade root 7 is 30.62mm.
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 P blade root, reasonably determined the size of blade root, solve the past to the improper problem that causes unit blade root when moving fracture accident to occur of blade root selection that large-scale full rotary speed steam turbine intermediate pressure cylinder blade uses, 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 under variable working condition, operation safely and efficiently.The utility model is applicable to the blade root of the wet cooling gas turbine groups such as subcritical, overcritical, peak regulation of making 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 made up of a pair of tooth 1, a centering tooth 2, a pair of lower tooth 3, first working surface 4, second working surface 5 and the 3rd working surface 6 gone up, a pair of upward tooth 1, a centering tooth 2 and a pair of lower tooth 3 are symmetricly set on the left and right sides of blade root 7 from top to bottom successively along 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 7.64mm, the plane of load height H b of middle tooth 2 is 6.59mm, the plane of load height H c of lower tooth 3 is 5.36mm, the width D of first working surface 4 is 15.24mm, the width E of second working surface 5 is 10.87mm, the width F of the 3rd working surface 6 is 6.29mm, and the top width Bg of blade root 7 is 22.31mm, and the height H g of blade root 7 is 30.62mm.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.Described P blade root 2.6100 blade roots of present embodiment are applicable to that the variable power scope is clammy large-scale full rotary speed steam turbine groups such as subcritical, overcritical, the peak regulation of 300MW-650MW grade.
Embodiment two: present embodiment is described in conjunction with Fig. 1, self fillet R1 at blade root 7 tops of present embodiment is 7.94mm, blade root 7 tops and a pair of knuckle R2 that goes up tooth 1 are 2.22mm, a pair of self the fillet R3 that goes up tooth 1 is 1.12mm, the a pair of knuckle R4 that goes up a tooth 1 and a centering tooth 2 is 1.21mm, self fillet R5 of one centering tooth 2 is 0.72mm, one centering tooth 2 is 1.21mm with the knuckle R6 of a pair of lower tooth 3, self fillet R7 of a pair of lower tooth 3 is 0.64mm, and a pair of lower tooth 3 is 4.63mm with the knuckle R8 of the bottom end of blade root 7.So be provided with, make Safety performance of the present utility model higher.
Claims (2)
1, the vertical tree type P 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, one centering tooth (2) and a pair of lower tooth (3) are symmetricly set on the left and right sides of blade root (7) from top to bottom successively along 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 H a that it is characterized in that tooth (1) is 7.64mm, the plane of load height H b of middle tooth (2) is 6.59mm, the plane of load height H c of lower tooth (3) is 5.36mm, the width D of first working surface (4) is 15.24mm, the width E of second working surface (5) is 10.87mm, the width F of the 3rd working surface (6) is 6.29mm, and the top width Bg of blade root (7) is 22.31mm, and the height H g of blade root (7) is 30.62mm.
2, vertical tree type P blade root according to the described a kind of large-scale full rotary speed steam turbine intermediate pressure cylinder blade use of claim 1, self the fillet R1 that it is characterized in that described blade root (7) top is 7.94mm, blade root (7) top and a pair of knuckle R2 that goes up tooth (1) are 2.22mm, a pair of self the fillet R3 that goes up tooth (1) is 1.12mm, the a pair of knuckle R4 that goes up a tooth (1) and a centering tooth (2) is 1.21mm, self fillet R5 of one centering tooth (2) is 0.72mm, one centering tooth (2) is 1.21mm with the knuckle R6 of a pair of lower tooth (3), self fillet R7 of a pair of lower tooth (3) is 0.64mm, and a pair of lower tooth (3) is 4.63mm with the knuckle R8 of the bottom end of blade root (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201175600U CN201103421Y (en) | 2007-12-03 | 2007-12-03 | Longitudinal tree type P 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 |
|---|---|---|---|
| CNU2007201175600U CN201103421Y (en) | 2007-12-03 | 2007-12-03 | Longitudinal tree type P blade root used for intermediate pressure cylinder blade of macrotype full rotary speed turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201103421Y true CN201103421Y (en) | 2008-08-20 |
Family
ID=39950446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201175600U Expired - Lifetime CN201103421Y (en) | 2007-12-03 | 2007-12-03 | Longitudinal tree type P blade root used for intermediate pressure cylinder blade of macrotype full rotary speed turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201103421Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH705325A1 (en) * | 2011-07-20 | 2013-01-31 | Alstom Technology Ltd | Blade for rotating turbomachine, particularly gas turbine, has multiple support prongs, which are arranged symmetrically to axis of symmetry assigned to one of blades |
-
2007
- 2007-12-03 CN CNU2007201175600U patent/CN201103421Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH705325A1 (en) * | 2011-07-20 | 2013-01-31 | Alstom Technology Ltd | Blade for rotating turbomachine, particularly gas turbine, has multiple support prongs, which are arranged symmetrically to axis of symmetry assigned to one of blades |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080820 |