CN101457657A - Axial positioning structure for firtree type blade root and blade - Google Patents
Axial positioning structure for firtree type blade root and blade Download PDFInfo
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- CN101457657A CN101457657A CNA2008101481450A CN200810148145A CN101457657A CN 101457657 A CN101457657 A CN 101457657A CN A2008101481450 A CNA2008101481450 A CN A2008101481450A CN 200810148145 A CN200810148145 A CN 200810148145A CN 101457657 A CN101457657 A CN 101457657A
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- stop block
- blade
- blade root
- arc
- stop
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Abstract
The invention discloses an axial positioning structure for a fir-shaped blade base and a blade. The blade base of the blade is embedded in a wheel groove of a blade wheel; on the homolateral end faces of the blade wheel and the blade base, an annular stop slot horizontally crossing the blade wheel and the blade base is arranged on radial matching surfaces corresponding to the blade wheel and the blade base, wherein, the annular stop slot is eccentric to the blade wheel, and a plurality sections of arc-shaped stop blocks are embedded in the slot, and the arc-shaped stop blocks are totally combined into a ring along a circumferential direction. The stop slot is provided with a section of opening, and the arc width of the opening is equal to that of the stop block; part of the stop block is a section of locking stop block, which is composed by a combination of a semi-stop block, a pressure plate and screw nails; the semi- stop block is embedded in the stop slot and is pressed by the pressure plate, and the pressure plate and the semi- stop block are fixedly connected by the screw nails. The axial positioning structure for the fir-shaped blade base and the blade has the technical effects of simple structure, accurate and reliable positioning, easy processing of the stop slot and the stop block and convenient assembly.
Description
Technical field
The present invention relates to the moving vane of turbine rotor, specifically, relate to a kind of axial positioning structure of firtree type blade root and blade.
Background technique
Fir-tree root is because of its special geometric form, and is stressed even, can bear bigger load, is stressed the most rational in the present all kinds blade root, is generally used for the little machine group rotor of high-revolving feed water pump and the final stage of high power turbine machine rotor, inferior final stage.
Because fir-tree root is from the impeller race of axially packing into, so axial positioning structure need be set, blade generation axial float when avoiding unit operation.Present axial positioning structure complexity, difficulty of processing is big, assembles loaded down with trivial details.
Summary of the invention
Purpose of the present invention is the shortcoming that overcomes existing axial positioning structure, provide a kind of simple in structure, be easy to process, firtree type blade root and blade axial positioning structure easy to assembly.
Technical solution of the present invention is:
A kind of axial positioning structure of firtree type blade root and blade, the blade root of blade is embedded in the race of impeller, on the same side end face of impeller, blade root, the position of corresponding impeller, blade root radial fit face, be provided with annular position-arresting groove across impeller, blade root, this annular position-arresting groove is concentric with impeller, is inlaid with multistage arc stop block in the groove, and all arc stop blocks are along circumferentially combination lopping.
The sectional shape of described arc stop block is swallow-tail form or T shape.
Described position-arresting groove have one section uncovered, be used to the stop block of packing into, the wide arc with stop block of this uncovered arc is wide consistent; Have one section to be the fore shaft stop block in the described stop block, this fore shaft stop block is constituted by half stop block, pressing plate, screw; Described half stop block is embedded in the position-arresting groove, and described pressing plate is pressed on half stop block, and is by screw that pressing plate, half stop block is fixedly connected.
Technique effect of the present invention:
The axial positioning structure of above-mentioned firtree type blade root and blade is simple, and accurate positioning is reliable, and position-arresting groove, piece are easy to processing, and be easy to assembly.
Description of drawings
Fig. 1 is this firtree type blade root and blade axial positioning structure figure
Fig. 2 is the M-M view (dovetail groove) of Fig. 1
Fig. 3 is the M-M view (T-slot) of Fig. 1
Fig. 4 is a fore shaft stop block structural drawing
Fig. 5 is the N-N view (dovetail groove) of Fig. 4
Fig. 6 is the N-N view (T-slot) of Fig. 4
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3: the blade root 3 of blade is embedded in the race of impeller 1, on the same side end face of impeller 1, blade root 3, the position of corresponding impeller, blade root radial fit face is provided with the annular position-arresting groove across impeller, blade root, this annular position-arresting groove is concentric with impeller, be inlaid with multistage arc stop block 2 in the groove, all arc stop blocks are along circumferentially combination lopping.
The sectional shape of described arc stop block 2 can be a swallow-tail form, as shown in Figure 2, and also T shape, as shown in Figure 3.
The quantity apparent size flexible in size of stop block 2 is provided with, and quantity is then processed loaded down with trivial details too much, and then weight is too heavy very little, and the assembling effort is generally 1/2 of blade quantity, i.e. corresponding two blades of each stop block.
Referring to Fig. 4, Fig. 5, Fig. 6: position-arresting groove have one section uncovered, the stop block 2 that is used to pack into, the wide arc with stop block of this uncovered arc is wide consistent.
Have one section to be the fore shaft stop block in the stop block, this fore shaft stop block is constituted by half stop block 6, pressing plate 4, screw 5; Half stop block 6 is embedded in the position-arresting groove, and pressing plate 4 is pressed on half stop block 6, and is by screw 5 that pressing plate 4, half stop block 6 is fixedly connected.
During assembling: earlier with stop block 2 one by one from the uncovered position-arresting groove of packing into, half stop block 4 of packing into then covers pressing plate 5, and is with screw 6 that pressing plate 5, rectangle stop block 4 is fixedly connected.
Claims (4)
1. the axial positioning structure of a firtree type blade root and blade, the blade root of blade is embedded in the race of impeller, it is characterized in that: on the same side end face of impeller, blade root, the position of corresponding impeller, blade root radial fit face is provided with the annular position-arresting groove across impeller, blade root, this annular position-arresting groove is concentric with impeller, be inlaid with multistage arc stop block in the groove, all arc stop blocks are along circumferentially combination lopping.
2. want the axial positioning structure of 1 described firtree type blade root and blade according to right, it is characterized in that: the sectional shape of described arc stop block is a swallow-tail form.
3. want the axial positioning structure of 1 described firtree type blade root and blade according to right, it is characterized in that: the sectional shape of described arc stop block is a T shape.
4. want the axial positioning structure of 1 described firtree type blade root and blade according to right, it is characterized in that: described position-arresting groove have one section uncovered, be used to the stop block of packing into, the wide arc with stop block of this uncovered arc is wide consistent; Have one section to be the fore shaft stop block in the described stop block, this fore shaft stop block is constituted by half stop block, pressing plate, screw; Described half stop block is embedded in the position-arresting groove, and described pressing plate is pressed on half stop block, and is by screw that pressing plate, half stop block is fixedly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101481450A CN101457657B (en) | 2008-12-30 | 2008-12-30 | Axial positioning structure for firtree type blade root and blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101481450A CN101457657B (en) | 2008-12-30 | 2008-12-30 | Axial positioning structure for firtree type blade root and blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101457657A true CN101457657A (en) | 2009-06-17 |
| CN101457657B CN101457657B (en) | 2010-12-29 |
Family
ID=40768752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101481450A Active CN101457657B (en) | 2008-12-30 | 2008-12-30 | Axial positioning structure for firtree type blade root and blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101457657B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162763A (en) * | 2018-09-10 | 2019-01-08 | 东方电气集团东方汽轮机有限公司 | A kind of blade root locking notch structure |
| CN110145372A (en) * | 2019-05-25 | 2019-08-20 | 立德动力设备(浙江)有限公司 | A kind of turbine rotor fork-shaped blade installation structure and its installation method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003226999A1 (en) * | 2002-05-24 | 2003-12-12 | Abb Turbo Systems Ag | Axial securing means for impeller blades |
| FR2890105A1 (en) * | 2005-08-31 | 2007-03-02 | Snecma | Retention ring immobilization device for e.g. engine of aircraft, has stops positioned such that stops are stopped respectively against immobilization hooks, and slot covered by other hook when retention ring is placed in groove |
| EP1916389A1 (en) * | 2006-10-26 | 2008-04-30 | Siemens Aktiengesellschaft | Turbine blade assembly |
-
2008
- 2008-12-30 CN CN2008101481450A patent/CN101457657B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162763A (en) * | 2018-09-10 | 2019-01-08 | 东方电气集团东方汽轮机有限公司 | A kind of blade root locking notch structure |
| CN110145372A (en) * | 2019-05-25 | 2019-08-20 | 立德动力设备(浙江)有限公司 | A kind of turbine rotor fork-shaped blade installation structure and its installation method |
| CN110145372B (en) * | 2019-05-25 | 2021-08-10 | 立德动力设备(浙江)有限公司 | Steam turbine rotor forked blade mounting structure and mounting method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101457657B (en) | 2010-12-29 |
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