CN201170122Y - Vertical tree type R blade root used by large-scale full rotary speed steam turbine low pressure cylinder blade - Google Patents
Vertical tree type R blade root used by large-scale full rotary speed steam turbine low pressure cylinder blade Download PDFInfo
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- CN201170122Y CN201170122Y CNU2008200892390U CN200820089239U CN201170122Y CN 201170122 Y CN201170122 Y CN 201170122Y CN U2008200892390 U CNU2008200892390 U CN U2008200892390U CN 200820089239 U CN200820089239 U CN 200820089239U CN 201170122 Y CN201170122 Y CN 201170122Y
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- blade root
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Abstract
A vertical tree type R blade root for a large-scale full speed steam turbine low-pressure cylinder blade relates to a blade root for a steam turbine low-pressure cylinder blade. The utility model solves the problem that the blade of the prior large-scale full speed steam turbine breaks off during the operation of the steam turbine assembly. According to the utility model, a first working plane (4) is positioned between the top of the blade root (7) and upper teeth (1), a second working plane (5) is positioned between the upper teeth (1) and intermediate teeth (2), and a third working plane (6) is positioned between the intermediate teeth (2) and lower teeth (3). A load surface height Ha of the upper teeth (1) is 4.89mm, a load surface height Hb of the intermediate teeth (2) is 4.29mm, a load surface height Hc of the lower teeth (3) is 4.34mm, the width D of the first working plane (4) is 12.75mm, the width E of the second working plane (5) is 9.46mm, and the width F of the third working plane (6) is 6.41mm. The vertical tree type R blade root which reasonably determines the size of the blade root and ensures the safety of the working process is suitable for the blade root of subcritical, supercritical and peak regulation wet cooling large-scale full speed steam turbine assemblies with a power variation range from 300MW to 650MW.
Description
Technical field
The utility model relates to the blade root that a kind of turbine low pressure cylinder blade uses.
Background technique
Along with the increase of thermal power steam turbine capacity, Large Steam Turbine Sets low pressure (LP) cylinder blade all adopts R type blade root usually.At present, because improper to the blade root selection of large-scale full rotary speed steam turbine low pressure (LP) 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 R blade root that provides a kind of large-scale full rotary speed steam turbine low pressure (LP) cylinder blade to use.
The utility model is made up of a pair of tooth, a centering tooth, a pair of lower tooth, first working surface, second working surface and the 3rd working surface gone up, a pair of upward tooth, a centering tooth and a pair of lower tooth are symmetricly set on the left and right sides of blade root from top to bottom successively along the center line of blade root, first working surface is between the top and last tooth of blade root, second working surface is between last tooth and middle tooth, and the 3rd working surface is between middle tooth and lower tooth; The plane of load height H a of last tooth is 4.89mm, the plane of load height H b of middle tooth is 4.29mm, the plane of load height H c of lower tooth is 4.34mm, the width D of first working surface is 12.75mm, the width E of second working surface is 9.46mm, the width F of the 3rd working surface is 6.41mm, and the top width Bg of blade root is 19.85mm, and the height H g of blade root is 22.35mm.
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 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 low pressure (LP) cylinder blade uses, guaranteed the Security of working procedure.The Security of design and high efficiency organically combine, and make the low pressure (LP) 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 4.89mm, the plane of load height H b of middle tooth 2 is 4.29mm, the plane of load height H c of lower tooth 3 is 4.34mm, the width D of first working surface 4 is 12.75mm, the width E of second working surface 5 is 9.46mm, the width F of the 3rd working surface 6 is 6.41mm, and the top width Bg of blade root 7 is 19.85mm, and the height H g of blade root 7 is 22.35mm.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 R blade root 2.6006 blade roots of present embodiment are applicable to that rate of doing work excursion is the blade root of 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 3.56mm, blade root 7 tops and a pair of knuckle R2 that goes up tooth 1 are 0.97mm, a pair of self the fillet R3 that goes up tooth 1 is 0.79mm, the a pair of knuckle R4 that goes up a tooth 1 and a centering tooth 2 is 0.79mm, self fillet R5 of one centering tooth 2 is 0.79mm, one centering tooth 2 is 0.79mm with the knuckle R6 of a pair of lower tooth 3, self fillet R7 of a pair of lower tooth 3 is 0.79mm, and a pair of lower tooth 3 is 2.03mm 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 R blade root that a kind of large-scale full rotary speed steam turbine low pressure (LP) 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), 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 4.89mm, the plane of load height H b of middle tooth (2) is 4.29mm, the plane of load height H c of lower tooth (3) is 4.34mm, the width D of first working surface (4) is 12.75mm, the width E of second working surface (5) is 9.46mm, the width F of the 3rd working surface (6) is 6.41mm, the top width Bg of blade root (7) is 19.85mm, and the height H g of blade root (7) is 22.35mm.
2, vertical tree type R blade root according to the described a kind of large-scale full rotary speed steam turbine low pressure (LP) cylinder blade use of claim 1, self the fillet R1 that it is characterized in that described blade root (7) top is 3.56mm, blade root (7) top and a pair of knuckle R2 that goes up tooth (1) are 0.97mm, a pair of self the fillet R3 that goes up tooth (1) is 0.79mm, the a pair of knuckle R4 that goes up a tooth (1) and a centering tooth (2) is 0.79mm, self fillet R5 of one centering tooth (2) is 0.79mm, one centering tooth (2) is 0.79mm with the knuckle R6 of a pair of lower tooth (3), self fillet R7 of a pair of lower tooth (3) is 0.79mm, and a pair of lower tooth (3) is 2.03mm with the knuckle R8 of the bottom end of blade root (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200892390U CN201170122Y (en) | 2008-02-01 | 2008-02-01 | Vertical tree type R blade root used by large-scale full rotary speed steam turbine low pressure cylinder blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200892390U CN201170122Y (en) | 2008-02-01 | 2008-02-01 | Vertical tree type R blade root used by large-scale full rotary speed steam turbine low pressure cylinder blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201170122Y true CN201170122Y (en) | 2008-12-24 |
Family
ID=40209175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200892390U Expired - Lifetime CN201170122Y (en) | 2008-02-01 | 2008-02-01 | Vertical tree type R blade root used by large-scale full rotary speed steam turbine low pressure cylinder blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201170122Y (en) |
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2008
- 2008-02-01 CN CNU2008200892390U patent/CN201170122Y/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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081224 |