CN206092076U - Take damping structure's turbine blade - Google Patents
Take damping structure's turbine blade Download PDFInfo
- Publication number
- CN206092076U CN206092076U CN201620987684.3U CN201620987684U CN206092076U CN 206092076 U CN206092076 U CN 206092076U CN 201620987684 U CN201620987684 U CN 201620987684U CN 206092076 U CN206092076 U CN 206092076U
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- China
- Prior art keywords
- blade
- damping
- integral shroud
- dry
- blade root
- Prior art date
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Abstract
The utility model relates to a take damping structure's turbine blade, include by integral shroud, blade root and the intermediate junction body, the intermediate junction body between blade root to the integral shroud distorts the structure for the variable cross section, just the thickness of the intermediate junction body is steadilyd decrease to the integral shroud by the blade root gradually the both sides face of integral shroud department is equipped with futilely the frictional damping piece, do the frictional damping piece and be the triangle -shaped structure, do the frictional damping piece and set up in apart from integral shroud top (0.2 0.25 )L department, just the thickness of doing the frictional damping piece is h=Hsin theta. The utility model discloses an increasing by two triangle -shaped damping pieces in blade both sides and being used for the damping that gains, the size of damping piece is according to the blade size and correspond angle setting, makes its damping effect and blade intensity homoenergetic satisfy the designing requirement. Unit when operation reduces blade vibration stress through the dry friction, and the damping that increases the blade is in order to reduce the blade response to reduce the dynamic stress of blade, than traditional structure, the damping increases by a wide margin, has improved controllable blade's security.
Description
Technical field
This utility model is related to turbine vane engineering device technique field, is specifically a kind of steam turbine leaf with damping structure
Piece.
Background technology
Blade is the important spare part of turbomachinery, and the blade failure that blade vibration is caused is the major accident shape of blade
One of formula.At present, steam turbine in the world is developed to high capacity, high speed.The high capacity of steam turbine causes blade to need ratio
Bigger steam flow power, centrifugal force and operating temperature were born in the past.Safety and the target for being efficiently blade design personnel, and blade
Safety is then considered to put in the first place, and blade design person reduces blade dynamic stress using various means, such as make blade in groups,
Lopping uses damping structure.Damping structure is constituted using damping lashing wire, mid-span shroud or shroud etc., by damping structure
It is the maximally effective method for reducing blade vibration stress that dry friction reduces blade vibration stress.Both at home and abroad blade antivibrator is ground
Study carefully and there has been some conclusions, but among being at the abstract theoretic discussion of comparison, the research of real practicality is also little.Damping leaf
Piece is run in actual set, how appropriate design damping vane so as to most effectively reduce the dynamic stress of blade,
It is problem in the urgent need to address.
Utility model content
For the problem that prior art is present, the utility model proposes a kind of turbine blade with damping structure, in vapour
Turbine blade top employs damping structure, increases the damping of blade to reduce paddle response, should so as to reduce the dynamic of blade
Power.
This utility model solves the technical scheme of above technical problem：A kind of turbine blade with damping structure is provided,
Including by integral shroud, blade root and intermediate connector, the blade root to the intermediate connector between integral shroud is variable cross-section distorted-structure, and
The thickness of the intermediate connector is gradually successively decreased from blade root to integral shroud, and the two sides at the integral shroud are provided with dry-friction damping
Block, dry-friction damping block structure triangular in shape, the dry-friction damping block are arranged at the top of integral shroud（0.2-0.25）L
Place, length of the L for intermediate connector；And the thickness of the dry-friction damping block is h=Hsin θ, wherein H is blade root thickness, and θ is
The distortion angle of intermediate connector.
The technical scheme that this utility model is further limited as：The aforesaid turbine blade with damping structure, it is described dry
Frictional damping block is equipped with rounded corners with blade root, and the rounded corners radius of dry-friction damping block is fallen with the blade root circle
Angular radius is identical.
Further, the aforesaid turbine blade with damping structure, described dry-friction damping block and turbine blade
Intermediate connector, blade root and integral shroud processed using high-strength corrosion-resistant erosion steel integrated vehicle.
The beneficial effects of the utility model：This utility model using blade both sides increase by two pieces of triangle damping blocks to
Gain is damped, and the size of damping block is arranged according to leaf blade size and corresponding angle so as to damping and the equal energy of blade strength
Meet design requirement.During unit operation, blade vibration stress is reduced by dry friction, increase the damping of blade to reduce blade sound
Should, so as to reduce the dynamic stress of blade, than traditional structure, damping is significantly increased, and improves the safety of governing-stage moving blade
Property.
Description of the drawings
Schematic diagrams of the Fig. 1 for this utility model structure.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of turbine blade with damping structure, and structure is as shown in figure 1, including by integral shroud 1, blade root
2 and intermediate connector 3, blade root to the intermediate connector between integral shroud is variable cross-section distorted-structure, and the thickness of intermediate connector
Gradually successively decreased from blade root to integral shroud, the two sides at integral shroud are provided with dry-friction damping block 4, dry-friction damping block knot triangular in shape
Structure, dry-friction damping block are equipped with rounded corners with blade root, and the rounded corners radius of dry-friction damping block is circular with blade root
Chamfer radius are identical；Dry-friction damping block is arranged at the top of integral shroud（0.2-0.25）At L, length of the L for intermediate connector；
And the thickness of dry-friction damping block is h=Hsin θ, wherein H is blade root thickness, and θ is the distortion angle of intermediate connector；Unlubricated friction
Intermediate connector, blade root and the integral shroud for wiping damping block and turbine blade loses steel integrated vehicle using high-strength corrosion-resistant and processes；
When installing and using, the gap between the damping block and mounting groove of blade is 0.4-0.6mm to the present embodiment.
In addition to the implementation, this utility model can also have other embodiment, all employing equivalents or equivalent change
The technical scheme to be formed is changed, the protection domain of this utility model requirement is all fallen within.
Claims (3)
1. a kind of turbine blade with damping structure, including by integral shroud, blade root and intermediate connector, it is characterised in that：It is described
Blade root is variable cross-section distorted-structure to the intermediate connector between integral shroud, and the thickness of the intermediate connector is from blade root to integral shroud
Gradually successively decrease, the two sides at the integral shroud are provided with dry-friction damping block, dry-friction damping block structure triangular in shape should
Dry-friction damping block is arranged at the top of integral shroud（0.2-0.25）At L, length of the L for intermediate connector；And the dry friction
The thickness of damping block is h=Hsin θ, and wherein H is blade root thickness, and θ is the distortion angle of intermediate connector.
2. the turbine blade with damping structure according to claim 1, it is characterised in that：The dry-friction damping block with
Blade root is equipped with rounded corners, and the rounded corners radius of dry-friction damping block is identical with the blade root rounded corners radius.
3. the turbine blade with damping structure according to claim 1, it is characterised in that：Described dry-friction damping block
Intermediate connector, blade root and integral shroud with turbine blade is processed using high-strength corrosion-resistant erosion steel integrated vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620987684.3U CN206092076U (en) | 2016-08-30 | 2016-08-30 | Take damping structure's turbine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620987684.3U CN206092076U (en) | 2016-08-30 | 2016-08-30 | Take damping structure's turbine blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206092076U true CN206092076U (en) | 2017-04-12 |
Family
ID=58474863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620987684.3U Active CN206092076U (en) | 2016-08-30 | 2016-08-30 | Take damping structure's turbine blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206092076U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224009A (en) * | 2016-08-30 | 2016-12-14 | 南京赛达机械制造有限公司 | The turbine blade of a kind of band damping structure and Technology for Heating Processing thereof |
| CN116933447A (en) * | 2023-09-17 | 2023-10-24 | 浙江大学高端装备研究院 | Method for evaluating reliability of damping structure of coated turbine blade |
-
2016
- 2016-08-30 CN CN201620987684.3U patent/CN206092076U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224009A (en) * | 2016-08-30 | 2016-12-14 | 南京赛达机械制造有限公司 | The turbine blade of a kind of band damping structure and Technology for Heating Processing thereof |
| CN116933447A (en) * | 2023-09-17 | 2023-10-24 | 浙江大学高端装备研究院 | Method for evaluating reliability of damping structure of coated turbine blade |
| CN116933447B (en) * | 2023-09-17 | 2024-01-09 | 浙江大学高端装备研究院 | Method for evaluating reliability of damping structure of coated turbine blade |
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