CN204851335U - Integration impeller - Google Patents
Integration impeller Download PDFInfo
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- CN204851335U CN204851335U CN201520479984.6U CN201520479984U CN204851335U CN 204851335 U CN204851335 U CN 204851335U CN 201520479984 U CN201520479984 U CN 201520479984U CN 204851335 U CN204851335 U CN 204851335U
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- blade
- impeller
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- leaf top
- blade profile
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Abstract
The utility model discloses an integration impeller, include vane wheel and the blade that distributes along the vane wheel circumferencial direction, the blade directly mills on vane wheel, the blade is followed its length direction and is included blade root, blade profile and leaf top three in proper order, constitutes airflow channel between the adjacent blade profile. The beneficial effect of the utility model: can effectively reduce possibility, process flow abbreviation that huge steam impact force damaged, cost reduction.
Description
Technical field
The utility model relates to a kind of Evaluating Method of Construction Component of Turbine, particularly a kind of integrated impeller.
Background technique
Blade is the critical component of steam turbine work, and quantity is a lot, and any one blade damage all by the safe operation of impact whole unit, seems particularly important to manufacturing and designing of blade.
There is certain pressure, the steam of temperature enters steam turbine, flow through nozzle, expand in nozzle, obtain very high speed, the moving vane acting of swiftly flowing vapor stream on turbine rotor, when moving vane is reactionary style, the reaction force that steam expands generation in movable vane also makes moving vane do work, movable vane drives turbine rotor to press certain speed uniform rotation, and moving vane is that kinetic energy (heat energy) is converted to mechanical energy, passes to generator amature by turbine rotor.The passage that steam flow flows through in steam turbine is called Turbine Flow Path, flow passage component is formed primarily of the level of moving vane and stator blade composition, the performance of Turbine Flow Path directly affects turbine LP rotors economy, safe operation, has conclusive impact to the power reliability of turbine LP rotors and heat-economy.
As time goes on the continuous progress of science, the hear rate of same type units is in continuous decline, universal law is every 8-10 decline 1%-2%, namely under identical steam parameter and power level condition, for the low 1%-2% than first 8-10 design of 8-10 design after the hear rate value of unit.
Unit long-time running also can produce deterioration phenomenon, and the polishing of flow passage component has damage at (comprising molded line surface roughness etc.), and gap can increase, and parts have distortion etc. that the heat-economy of unit and reliability also can be made to decrease.
In prior art, separable blade is assemblied in the circumferential bayonet slot on impeller, need ensure gapless in assembly process, in case uppermost leaf sheet loosens, and then cause vibration, in use service time is longer, and loosening more may appear in blade.
Therefore prior art haves much room for improvement and develops.
Model utility content
The technical problems to be solved in the utility model is to provide a kind of impeller enormous impact power that is integrated with blade, that prevent high pressure steam and blade is produced to the impeller damaged.
Technical solution of the present utility model is: integrated impeller, and comprise impeller body and the blade along the distribution of impeller body circumferencial direction, the direct milling of blade is on impeller body; Blade comprises blade root, blade profile and three, leaf top part along its length successively, forms air-flow path between adjacent blade profile.Not only dynamic stress is little for this form shroud, and high temperature creep resistance is good, can increase the bulk strength of blade, also after whole circle blade assernbling, can be coordinated by whole for shroud circle finish turning form labyrinth gland with labyrinth strip, reduces interstage leakage loss.Add the intensity of blade, prevent the enormous impact power of high pressure steam from producing blade and damage, by five-axis robot, by direct for blade milling on impeller. reduce the difficulty of processing.
Described blade profile is aft-loading airfoil, and described leaf top is integral (tip) shroud structural type.Prevent the leakage of steam, reduce the lateral flow loss of blade tip, increase blade damping.
Described blade profile each cross section established angle is 34 ° ~ 55 °.
Described blade root is vertical tree type blade root.
Blade profile trailing edge radius R1 Changing Pattern from described blade root cross section to described leaf top section is: 1.0mm≤R1≤3.5mm.The little circle radius of blade trailing edge is less, reduces trailing edge loss.
The beneficial effects of the utility model:
Effectively can reduce the possibility of huge steam impringement power damage, technological process abbreviation, cost reduction.And dynamic stress is little, high temperature creep resistance is good, can increase the bulk strength of blade, also after whole circle blade assernbling, can be coordinated by whole for shroud circle finish turning form labyrinth gland with labyrinth strip, reduces interstage leakage loss.Add the intensity of blade, prevent the enormous impact power of high pressure steam from producing blade and damage, by five-axis robot, by direct for blade milling on impeller. reduce the difficulty of processing.
Accompanying drawing explanation
Fig. 1 is the utility model overall structure schematic diagram.
Embodiment
Embodiment:
Consult Fig. 1, integrated impeller, comprise impeller body 1 and the blade 2 along the distribution of impeller body 1 circumferencial direction, the direct milling of blade 2 is on impeller body 1; Blade 2 comprises blade root 21, blade profile 22 and 23 3, leaf top part along its length successively, forms air-flow path between adjacent blade profile 22.Blade profile 22 is aft-loading airfoil 22, and leaf top 23 is integral (tip) shroud structural type.Prevent the leakage of steam, reduce the lateral flow loss on blade 2 top, increase blade 2 damping.Blade profile 22 each cross section established angle is 34 ° ~ 55 °.Blade root 21 is vertical tree type blade root 21.Blade profile 22 trailing edge radius R1 Changing Pattern from blade root 21 cross section to cross section, leaf top 23 is: 1.0mm≤R1≤3.5mm.The little circle radius of blade 2 trailing edge is less, reduces trailing edge loss.
Leaf top 23 is that not only dynamic stress is little for integral (tip) shroud structural type, high temperature creep resistance is good, can increase the bulk strength of blade 2, also can after whole circle blade 2 assembles, whole for shroud circle finish turning is coordinated with labyrinth strip and forms labyrinth gland, reduce interstage leakage loss.Add the intensity of blade 2, prevent the enormous impact power of high pressure steam from producing blade 2 and damage, by five-axis robot, by direct for blade 2 milling on impeller. reduce the difficulty of processing.
Because blade 2 is long-term works under high temperature, high pressure or certain temperature difference, the pressure difference effect, as long as have a slice blade 2 to interrupt will cause the accident, in order to ensure blade 2 Security in use, the material of this Series Blade 2 have employed resistant to elevated temperatures X20Cr13-5,2Cr12MoV-5 material.
Integrated impeller of the present utility model effectively can reduce possibility, the technological process abbreviation that huge steam impringement power is damaged in sum; Cost reduces.
Above-listed detailed description is illustrating for the utility model possible embodiments, and this embodiment is also not used to limit the scope of the claims of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and all should be contained in the scope of the claims of this case.
Claims (5)
1. integrated impeller, is characterized in that: comprise impeller body and the blade along the distribution of impeller body circumferencial direction, the direct milling of blade is on impeller body; Blade comprises blade root, blade profile and three, leaf top part along its length successively, forms air-flow path between adjacent blade profile.
2. integrated impeller according to claim 1, it is characterized in that: described blade profile is aft-loading airfoil, described leaf top is integral (tip) shroud structural type.
3. integrated impeller according to claim 1, is characterized in that: described blade profile each cross section established angle is 34 ° ~ 55 °.
4. integrated impeller according to claim 1, is characterized in that: described blade root is vertical tree type blade root.
5. integrated impeller according to claim 1, is characterized in that: the blade profile trailing edge radius R1 Changing Pattern from described blade root cross section to described leaf top section is: 1.0mm≤R1≤3.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520479984.6U CN204851335U (en) | 2015-07-03 | 2015-07-03 | Integration impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520479984.6U CN204851335U (en) | 2015-07-03 | 2015-07-03 | Integration impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204851335U true CN204851335U (en) | 2015-12-09 |
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ID=54741893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520479984.6U Active CN204851335U (en) | 2015-07-03 | 2015-07-03 | Integration impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204851335U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997694A (en) * | 2020-07-20 | 2020-11-27 | 合肥通用机械研究院有限公司 | Turbine wheel with improved shroud structure |
| CN112282938A (en) * | 2020-10-28 | 2021-01-29 | 上海尚实能源科技有限公司 | Centerbody assembly for a gas turbine engine |
-
2015
- 2015-07-03 CN CN201520479984.6U patent/CN204851335U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997694A (en) * | 2020-07-20 | 2020-11-27 | 合肥通用机械研究院有限公司 | Turbine wheel with improved shroud structure |
| CN111997694B (en) * | 2020-07-20 | 2023-12-08 | 合肥通用机械研究院有限公司 | Turbine wheel with improved shroud structure |
| CN112282938A (en) * | 2020-10-28 | 2021-01-29 | 上海尚实能源科技有限公司 | Centerbody assembly for a gas turbine engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 201611 3 3 Ting Ting Road, Che Dun Town, Songjiang District, Shanghai Patentee after: Shanghai Shangshi aeroengine Co.,Ltd. Address before: 200032 room 313, building 2, No. 738, Guangji Road, Hongkou District, Shanghai Patentee before: SHANGHAI SHANGSHI ENERGY TECHNOLOGY CO.,LTD. |
|
| CP03 | Change of name, title or address |