CN104265377B - A kind of structure reducing vertical tree type wheel hub molded line place stress - Google Patents
A kind of structure reducing vertical tree type wheel hub molded line place stress Download PDFInfo
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- CN104265377B CN104265377B CN201410470370.1A CN201410470370A CN104265377B CN 104265377 B CN104265377 B CN 104265377B CN 201410470370 A CN201410470370 A CN 201410470370A CN 104265377 B CN104265377 B CN 104265377B
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Abstract
The present invention relates to turbine rotor, particularly a kind of structure reducing vertical tree type wheel hub molded line place stress of steam turbine rotor, mainly solve the problem of stress distribution inequality between each tooth of vertical tree type wheel hub.Technological scheme: a kind of structure reducing vertical tree type wheel hub molded line place stress, include main shaft, main shaft is followed successively by governing stage wheel hub, the regulating stage blade be connected with governing stage wheel hub, intergrade wheel hub, the intermediate blade be connected with intergrade wheel hub, final stage wheel hub, the exhaust stage blade that is connected with final stage wheel hub from left to right, it is characterized in that axially symmetrically in the middle part of the blade root of exhaust stage blade being equipped with blind hole.The present invention is mainly used in the stress that steam turbine rotor reduces vertical tree type wheel hub molded line place.
Description
Technical field
The present invention relates to turbine rotor, particularly a kind of structure reducing vertical tree type wheel hub molded line place stress of steam turbine rotor, be mainly used in the stress that steam turbine rotor reduces vertical tree type wheel hub molded line place.
Background technique
Steam turbine last stage blade due to pressure ratio comparatively large, length of blade is generally all longer, so centrifugal force is general all very large, and the stress that centrifugal force causes often can cause the strength deficiency of blade root and wheel hub.In order to make blade root and wheel hub have larger bearing capacity, exhaust stage blade can adopt vertical tree type blade root usually, corresponding wheel hub i.e. vertical tree type wheel hub.Although vertical tree type blade root, wheel hub bearing capacity are larger, but due to blade root, blade center of gravity do not overlap, the reason such as machining error, easily cause the stress distribution before each tooth of vertical tree type wheel hub uneven, the bearing capacity of wheel hub sharply declines, and the advantage of vertical tree type plays not out.
Through finite element analysis software (ansys) analog computation, the stress caused due to blade centrifugal force mainly concentrates on one, the bottom tooth of wheel hub, stress on all the other several teeth is then less, if stress can be allowed all to assign on each tooth, the bearing capacity of wheel hub will improve a lot.There is limited evidence currently of has document and data to mention how to make stress distribution between each tooth of vertical tree type wheel hub even, and the major way solving blade root and wheel hub strength deficiency increases the number of teeth, and the number of teeth more multi-processing is more difficult.
Summary of the invention
In order to solve the technical problem of stress distribution inequality between each tooth of vertical tree type wheel hub, the invention provides a kind of structure reducing vertical tree type wheel hub molded line place stress, this structure can not only make the stress distribution before each tooth of vertical tree type wheel hub comparatively even, and blade root is also had to the effect of loss of weight, the centrifugal force of whole blade root is reduced, and the dynamic performance of rotor improves.
The technical solution adopted for the present invention to solve the technical problems is: a kind of structure reducing vertical tree type wheel hub molded line place stress, include main shaft, main shaft is followed successively by governing stage wheel hub, the regulating stage blade be connected with governing stage wheel hub, intergrade wheel hub, the intermediate blade be connected with intergrade wheel hub, final stage wheel hub, the exhaust stage blade that is connected with final stage wheel hub from left to right, it is characterized in that axially symmetrically in the middle part of the blade root of exhaust stage blade being equipped with blind hole.
The aperture of blind hole is 10mm, and blind hole distance of center circle is 10mm from the distance of blade root end face.
The invention has the advantages that, the stress at vertical tree type wheel hub molded line place can not only be made to reduce, each tooth is all fully utilized, and blade root is also had to the effect of loss of weight, reduce the centrifugal force of blade root, thus the stress of leaf root part is reduced, the weight of blade root reduces also very favourable to the dynamic performance of rotor, and the thick layer between two blind holes also can stop passing through of steam, do not have gas leak phenomenon during operation and produce.The present invention does not need too much technological transformation, and structure simple, be easy to operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is exhaust stage blade leaf and root structure schematic diagram of the present invention.
Fig. 3 is final stage wheel hub structure schematic diagram of the present invention.
In figure: 1. main shaft, 2. governing stage wheel hub, 3. regulating stage blade, 4. intergrade wheel hub, 5. intermediate blade, 6. final stage wheel hub, 7. exhaust stage blade, 8. blind hole.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
With reference to Fig. 1,2,3, reduce a structure for vertical tree type wheel hub molded line place stress, main shaft 1 is provided with governing stage wheel hub 2, the regulating stage blade 3 be connected with governing stage wheel hub, intergrade wheel hub 4, the intermediate blade 5 be connected with intergrade wheel hub, final stage wheel hub 6, the exhaust stage blade 7 that is connected with final stage wheel hub.After steam enters runner from nozzle, blade drives main axis under the thrust of steam, blade root is meshed with wheel hub under the influence of centrifugal force, wheel hub bears tensile stress, due to blade root, blade center of gravity do not overlap, the reason such as machining error, easily cause the stress distribution before each tooth of vertical tree type wheel hub uneven, the bearing capacity of wheel hub sharply declines.The present invention is axially symmetrical in the middle part of the blade root of exhaust stage blade 7 is equipped with blind hole 8.The aperture of blind hole 8 is 10mm, and blind hole 8 distance of center circle is 10mm from the distance of blade root end face.
Because symmetrical blind hole 8 is not communicated with, do not have Lou vapour phenomenon during operation and occur.The present invention can not only make the stress at vertical tree type wheel hub molded line place reduce, each tooth is all fully utilized, and exhaust stage blade 7 blade root is also had to the effect of loss of weight, reduce the centrifugal force of blade root, thus the stress of leaf root part is reduced, the weight of blade root reduces also very favourable to the dynamic performance of rotor.
Claims (2)
1. one kind is reduced the structure of vertical tree type wheel hub molded line place stress, include main shaft, main shaft is followed successively by governing stage wheel hub, the regulating stage blade be connected with governing stage wheel hub, intergrade wheel hub, the intermediate blade be connected with intergrade wheel hub, final stage wheel hub, the exhaust stage blade that is connected with final stage wheel hub from left to right, it is characterized in that axially symmetrically in the middle part of the blade root of exhaust stage blade being equipped with blind hole.
2. a kind of structure reducing vertical tree type wheel hub molded line place stress according to claim 1, is characterized in that the aperture of blind hole is 10mm, and blind hole distance of center circle is 10mm from the distance of blade root end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410470370.1A CN104265377B (en) | 2014-09-16 | 2014-09-16 | A kind of structure reducing vertical tree type wheel hub molded line place stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410470370.1A CN104265377B (en) | 2014-09-16 | 2014-09-16 | A kind of structure reducing vertical tree type wheel hub molded line place stress |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104265377A CN104265377A (en) | 2015-01-07 |
| CN104265377B true CN104265377B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410470370.1A Active CN104265377B (en) | 2014-09-16 | 2014-09-16 | A kind of structure reducing vertical tree type wheel hub molded line place stress |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6065938A (en) * | 1996-06-21 | 2000-05-23 | Siemens Aktiengesellschaft | Rotor for a turbomachine having blades to be fitted into slots, and blade for a rotor |
| WO2001071166A1 (en) * | 2000-03-21 | 2001-09-27 | Siemens Aktiengesellschaft | Turbine rotor blade |
-
2014
- 2014-09-16 CN CN201410470370.1A patent/CN104265377B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6065938A (en) * | 1996-06-21 | 2000-05-23 | Siemens Aktiengesellschaft | Rotor for a turbomachine having blades to be fitted into slots, and blade for a rotor |
| WO2001071166A1 (en) * | 2000-03-21 | 2001-09-27 | Siemens Aktiengesellschaft | Turbine rotor blade |
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|---|---|
| CN104265377A (en) | 2015-01-07 |
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Inventor after: Feng Mingfei Inventor after: Fan Changzheng Inventor before: Lin Feng Inventor before: Zuo Yanfeng |
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Effective date of registration: 20190328 Address after: Room 865, Building 1758 Luchaogang Road, Nanhui New Town, Pudong New District, Shanghai 201308 Co-patentee after: Jiangsu Jintongling Fluid Machinery Technology Co., Ltd. Patentee after: SHANGHAI JINTONGLING POWER TECHNOLOGY CO., LTD. Address before: Room 865, Building 1758 Luchaogang Road, Nanhui New Town, Pudong New District, Shanghai 201308 Patentee before: SHANGHAI JINTONGLING POWER TECHNOLOGY CO., LTD. |
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Address after: 201308, Shanghai, Nanhui, Pudong New Area new town, 1758 Hong Kong Road, No. 1, room 865 Co-patentee after: Jintongling Technology Group Co., Ltd. Patentee after: SHANGHAI JINTONGLING POWER TECHNOLOGY CO., LTD. Address before: 201308, Shanghai, Nanhui, Pudong New Area new town, 1758 Hong Kong Road, No. 1, room 865 Co-patentee before: Jiangsu Jintongling Fluid Machinery Technology Co., Ltd. Patentee before: SHANGHAI JINTONGLING POWER TECHNOLOGY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |