CN114319578A - Steam turbine base structure for axial steam exhaust - Google Patents
Steam turbine base structure for axial steam exhaust Download PDFInfo
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- CN114319578A CN114319578A CN202111547672.0A CN202111547672A CN114319578A CN 114319578 A CN114319578 A CN 114319578A CN 202111547672 A CN202111547672 A CN 202111547672A CN 114319578 A CN114319578 A CN 114319578A
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- 238000009792 diffusion process Methods 0.000 claims abstract description 19
- 238000000605 extraction Methods 0.000 claims description 11
- 239000011150 reinforced concrete Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The invention provides a steam turbine base structure for axial steam exhaust, and relates to the field of steam turbine bases. The steam turbine base structure comprises a first support structure, a second support structure, a third support structure and a fourth support structure which are sequentially arranged at intervals along the axis direction, wherein a first cross beam is arranged at the upper part of the first support structure, a second cross beam is arranged at the upper part of the second support structure, and a third cross beam is arranged at the upper part of the third support structure; the fourth support structure comprises two fourth stand columns, a fourth filling wall and a support column, wherein the fourth filling wall and the support column are arranged between the two fourth stand columns; the fourth infill wall is respectively with two fourth stand fixed connection, and the downside of protruding platform is located at the fourth infill wall interval, and the middle part between two fourth stands is located to the support column, and the top of support column is used for cooperating with the exhaust diffusion section roof pressure of condenser.
Description
Technical Field
The invention relates to the technical field of steam turbine bases, in particular to a steam turbine base structure for axial steam exhaust.
Background
In a thermal power plant, a steam turbine generator generally includes a high-pressure cylinder, a low-pressure cylinder, a generator and a condenser, and after high-temperature and high-pressure steam works through the high-pressure cylinder and the low-pressure cylinder, the steam is discharged into the condenser to be condensed into water.
At present, current turbo generator adopts the design of downward exhaust, and high pressure jar, low pressure jar and generator are installed on the turbine base, and the condenser setting is in the below of low pressure jar, and steam gets into in the condenser through the downward exhaust behind the low pressure jar. The steam turbine base is a core structure for supporting the steam turbine generator, generally, the steam turbine base is an integral frame structure, and the bearings of all rotors are supported on the frame, so that the stress and vibration resistance are ensured. However, due to the factory layout, the low pressure cylinder needs to be designed into an axial steam exhaust form, that is, the condenser is required to be arranged at one end of the low pressure cylinder along the axis direction.
Because the exhaust diffusion section size of condenser is big, it produces the interference with the top crossbeam of turbine base, if cancel the top crossbeam then can destroy turbine base's frame wholeness, can't guarantee rigidity and dynamic characteristic, lead to the vibration of base not meeting the equipment requirement.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a turbine base structure for axial steam exhaust, so as to solve the problem that the vibration of the base does not meet the requirements of the equipment because the exhaust diffuser of the condenser interferes with the top cross beam of the turbine base, and if the top cross beam is cancelled, the integrity of the frame of the turbine base is damaged, and the rigidity and the dynamic characteristics cannot be ensured.
The technical scheme of the steam turbine base structure for axial steam exhaust provided by the invention is as follows:
the steam turbine base structure for axial steam exhaust comprises a first support structure, a second support structure, a third support structure and a fourth support structure which are sequentially arranged at intervals along the shafting direction, wherein a first cross beam is arranged at the upper part of the first support structure, a second cross beam is arranged at the upper part of the second support structure, and a third cross beam is arranged at the upper part of the third support structure;
a generator mounting area is formed between the first cross beam and the second cross beam, a high-pressure cylinder mounting area is formed between the second cross beam and the third cross beam, and a low-pressure cylinder mounting area is formed between the third cross beam and the upper part of the fourth support structure;
the fourth support structure comprises two fourth stand columns, a fourth filling wall and a support column, wherein the fourth filling wall and the support column are arranged between the two fourth stand columns;
the fourth infill wall is respectively and fixedly connected with the two fourth stand columns, the fourth infill wall is arranged at the lower side of the protruding support platform at intervals, the support column is arranged in the middle between the two fourth stand columns, and the top of the support column is used for being in top pressure fit with the exhaust diffusion section of the condenser.
Furthermore, the two convex support platforms are symmetrically arranged around a shafting central line, and the protruding length of each convex support platform is less than one fourth of the distance between the two fourth stand columns.
Furthermore, the shape and the profile of the two convex supporting platforms are the same, the inner sides of the convex supporting platforms are provided with inclined side surfaces inclined in the direction of the shaft system, and the upper edges of the inclined side surfaces are used for being in top pressure fit with the exhaust diffusion sections of the condenser.
Furthermore, the number of the support columns is two, one of the support columns is arranged on the front side of the fourth filling wall, and the other support column is arranged on the rear side of the fourth filling wall.
Furthermore, a span beam is fixedly connected between the two support columns, the span beam penetrates through the fourth infilled wall along the axis direction, and the two support columns and the span beam form an H-shaped support structure.
Furthermore, the fourth infilled wall is a reinforced concrete wall, the support column and two fourth columns are reinforced concrete columns, and the fourth infilled wall, the support column and two fourth columns are integrally cast.
Further, the height of the fourth infill wall is greater than one third of the height of the fourth upright, and the height of the fourth infill wall is less than one half of the height of the fourth upright.
Furthermore, the third support structure comprises two third columns and a third infill wall arranged between the two third columns, the third infill wall is fixedly connected with the two third columns respectively, and the height of the third infill wall is smaller than that of the fourth infill wall.
Furthermore, a top longitudinal beam is connected among the first support structure, the second support structure, the third support structure and the fourth support structure, two top longitudinal beams are arranged in parallel at intervals and are symmetrically arranged on two sides of a shafting central line.
Has the advantages that: this a steam turbine base structure for axial exhaust has adopted first bearing structure, the second bearing structure, the design form of third bearing structure and fourth bearing structure, form the generator installing zone between the first crossbeam of first bearing structure and the second crossbeam of second bearing structure, form the high pressure jar installing zone between the second crossbeam of second bearing structure and the third crossbeam of third bearing structure, form the low pressure jar installing zone between the third crossbeam of third bearing structure and the upper portion of fourth bearing structure, can supply the generator, the high pressure jar, the low pressure jar is installed in proper order on steam turbine base structure, the outside that corresponds the low pressure jar is located to the condenser, exhaust diffusion section through the condenser is connected with the low pressure jar.
Because be equipped with fourth infilled wall and support column between two fourth stands of fourth support structure, the upper portion of two fourth stands all is equipped with protruding platform, two protruding platforms are towards inboard protrusion and interval arrangement, the holding interval department is arranged in to the exhaust diffuser of condenser, and the exhaust diffuser of the top roof pressure condenser of support column, utilize protruding platform and support column dispersion atress, play the stabilizing support effect jointly, save the fourth crossbeam between two fourth stands, ensure that the exhaust diffuser of condenser can follow the shafting direction and draw forth the arrangement.
The fourth filling walls are fixedly connected with the two fourth stand columns respectively, and are arranged on the lower sides of the convex support platforms at intervals, so that accommodating spaces of the exhaust diffusion sections and the pipelines are reserved; the fourth infilled wall plays the horizontal restraint effect to two fourth stands for the fourth support structure forms monolithic structure, prevents to destroy the frame wholeness of steam turbine base, guarantees rigidity and dynamic characteristic, ensures that the vibration performance of base satisfies the equipment requirement.
Drawings
FIG. 1 is a schematic front view of a turbine generator mounted on a turbine base structure in an embodiment of the present invention for axial steam extraction;
FIG. 2 is a schematic top view of a turbine base structure in an embodiment of the present invention for axial steam extraction;
FIG. 3 is a schematic right side view of a turbine base structure in an embodiment of the turbine base structure for axial steam extraction of the present invention;
fig. 4 is a schematic cross-sectional view of the turbine base structure a-a of fig. 3.
In the figure: 1-a first support structure, 11-a first cross beam, 2-a second support structure, 20-a top longitudinal beam and 21-a second cross beam;
3-a third support structure, 30-a third upright post, 31-a third cross beam and 32-a third infilled wall;
4-a fourth support structure, 40-a fourth upright post, 41-a convex support platform, 42-a fourth infilled wall, 43-a support column and 44-a span beam;
5-a generator, 6-a high pressure cylinder, 7-a low pressure cylinder, 8-a condenser and 80-an exhaust diffusion section of the condenser.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In embodiment 1 of the steam turbine base structure for axial steam extraction of the present invention, as shown in fig. 1 to 4, the steam turbine base structure for axial steam extraction includes a first support structure 1, a second support structure 2, a third support structure 3, and a fourth support structure 4, which are sequentially arranged at intervals along a shafting direction, wherein a first beam 11 is disposed on an upper portion of the first support structure 1, a second beam 21 is disposed on an upper portion of the second support structure 2, and a third beam 31 is disposed on an upper portion of the third support structure 3; a generator mounting area is formed between the first beam 11 and the second beam 21, a high-pressure cylinder mounting area is formed between the second beam 21 and the third beam 31, and a low-pressure cylinder mounting area is formed between the third beam 31 and the upper part of the fourth support structure 4.
The fourth support structure 4 comprises two fourth upright columns 40, and a fourth infilled wall 42 and a support column 43 which are arranged between the two fourth upright columns 40, the two fourth upright columns 40 are correspondingly arranged on two sides of the center line of the shafting, the upper parts of the two fourth upright columns 40 are respectively provided with an inward convex support 41, and an accommodating interval is formed between the two convex support 41; the fourth filler walls 42 are respectively fixedly connected with the two fourth vertical columns 40, the fourth filler walls 42 are arranged on the lower sides of the convex supporting platforms 41 at intervals, the supporting columns 43 are arranged in the middle between the two fourth vertical columns 40, and the tops of the supporting columns 43 are used for being in top pressing fit with the exhaust diffusion sections 80 of the condenser.
This a steam turbine base structure for axial steam extraction has adopted the design form of first bearing structure 1, second bearing structure 2, third bearing structure 3 and fourth bearing structure 4, form the generator installing zone between first crossbeam 11 of first bearing structure 1 and the second crossbeam 21 of second bearing structure 2, form the high pressure jar installing zone between the second crossbeam 21 of second bearing structure 2 and the third crossbeam 31 of third bearing structure 3, form the low pressure jar installing zone between the third crossbeam 3 of third bearing structure 3 and the upper portion of fourth bearing structure 4, can supply generator 5, high pressure jar 6, low pressure jar 7 to install on steam turbine base structure in proper order, condenser 8 locates the outside that corresponds low pressure jar 7, be connected with low pressure jar 7 through the exhaust diffuser 80 of condenser.
Because the fourth filler wall 42 and the support column 43 are arranged between the two fourth columns 40 of the fourth support structure 4, the upper parts of the two fourth columns 40 are respectively provided with the convex support platforms 41, the two convex support platforms 41 protrude inwards and are arranged at intervals, the exhaust diffusion section 80 of the condenser is arranged at the accommodating interval, the top of the support column 43 presses against the exhaust diffusion section 80 of the condenser, the convex support platforms 41 and the support column 43 are used for dispersing stress, a stable support function is achieved together, the fourth cross beam between the two fourth columns 40 is omitted, and the exhaust diffusion section 80 of the condenser can be led out and arranged along the shafting direction.
The fourth filling walls 42 are respectively fixedly connected with the two fourth columns 40, the fourth filling walls 42 are arranged at the lower side of the convex support platform 41 at intervals, and accommodating spaces for an exhaust diffusion section and pipelines are reserved; the fourth infill wall 42 plays a role in transversely constraining the two fourth uprights 40, so that the fourth support structure 4 forms an integral structure, the integrity of the frame of the steam turbine base is prevented from being damaged, the rigidity and the dynamic characteristics are ensured, and the vibration performance of the base is ensured to meet the requirements of equipment.
In this embodiment, the two protrusion support platforms 41 are symmetrically arranged about the shafting center line, and the protrusion length of the protrusion support platform 41 is less than one fourth of the distance between the two fourth pillars 40. Moreover, the two convex support platforms 41 have the same shape and contour, the inner sides of the convex support platforms 41 are provided with inclined side surfaces inclined to the axis direction, and the upper edges of the inclined side surfaces are used for being in press fit with the exhaust diffusion section 80 of the condenser.
Specifically, the distance between the two fourth pillars 40 is 6750mm, the maximum value of the protruding length of the protruding support platform 41 is 878mm, the minimum value of the protruding length of the protruding support platform 41 is 745mm, and the maximum width of the accommodating space is 5260mm, so that the exhaust diffusion section 80 of the condenser can be smoothly led out and arranged, and the two protruding support platforms 41 can laterally position and support the exhaust diffusion section 80 of the condenser.
Two support columns 43 are provided, wherein one support column 43 is provided at the front side of the fourth infill wall 42, and the other support column 43 is provided at the rear side of the fourth infill wall 42. And, fixedly connected with span beam 44 between two support columns 43, span beam 44 passes through fourth infilled wall 42 along the shafting direction and sets up, and two support columns 43 constitute H type bearing structure with span beam 44. By utilizing the design of the H-shaped supporting structure, the exhaust diffusion section 80 of the condenser can be respectively supported at the front and rear positions of the lower part of the exhaust diffusion section, so that the bearing effect and the stability are ensured.
The fourth infilled wall 42 is the reinforced concrete wall, and support column 43 and two fourth stands 40 are the reinforced concrete post, and fourth infilled wall 42, support column 43 and two fourth stands 40 integrated into one piece are poured into one piece, have improved the structural integrity of fourth support structure 4. The height of the fourth infill wall 42 is greater than one third of the height of the fourth upright post 40, and the height of the fourth infill wall 42 is less than one half of the height of the fourth upright post 40, so that a sufficient accommodating space can be reserved, the two fourth upright posts 40 can be connected and restrained, and the problem that the protruding support table 41 bears excessive lateral pressure to cause structural change is solved.
In this embodiment, the third support structure 3 includes two third vertical columns 30 and a third infill wall 32 disposed between the two third vertical columns 30, the third infill wall 32 is respectively and fixedly connected to the two third vertical columns 30, the height of the third infill wall 32 is smaller than the height of the fourth infill wall 42, an auxiliary reinforcing effect is formed by the third infill wall 32, and the structural strength, the rigidity and the vibration resistance of the base frame are improved.
In addition, top longitudinal beams 20 are connected among the first support structure 1, the second support structure 2, the third support structure 3 and the fourth support structure 4, the two top longitudinal beams 20 are arranged in parallel at intervals, the two top longitudinal beams 20 are symmetrically arranged on two sides of a shafting central line, the first support structure 1, the second support structure 2, the third support structure 3 and the fourth support structure 4 are connected through the two top longitudinal beams 20 to form an integral frame, and the structural performance of the steam turbine base is ensured to meet the equipment requirements.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. A steam turbine base structure for axial steam exhaust is characterized by comprising a first support structure, a second support structure, a third support structure and a fourth support structure which are sequentially arranged at intervals along a shafting direction, wherein a first cross beam is arranged at the upper part of the first support structure, a second cross beam is arranged at the upper part of the second support structure, and a third cross beam is arranged at the upper part of the third support structure;
a generator mounting area is formed between the first cross beam and the second cross beam, a high-pressure cylinder mounting area is formed between the second cross beam and the third cross beam, and a low-pressure cylinder mounting area is formed between the third cross beam and the upper part of the fourth support structure;
the fourth support structure comprises two fourth stand columns, a fourth filling wall and a support column, wherein the fourth filling wall and the support column are arranged between the two fourth stand columns;
the fourth infill wall is respectively and fixedly connected with the two fourth stand columns, the fourth infill wall is arranged at the lower side of the protruding support platform at intervals, the support column is arranged in the middle between the two fourth stand columns, and the top of the support column is used for being in top pressure fit with the exhaust diffusion section of the condenser.
2. The steam turbine base structure for axial steam extraction as recited in claim 1, wherein the two raised abutments are symmetrically disposed about the shafting centerline, and the raised abutment has a projection length less than one quarter of the distance between the two fourth pillars.
3. The turbine base structure for axial steam exhaust according to claim 1 or 2, wherein the two raised support platforms have the same shape and contour, the inner sides of the raised support platforms are provided with inclined side surfaces inclined to the axis direction, and the upper edges of the inclined side surfaces are used for being in abutting fit with the exhaust diffusion section of the condenser.
4. The turbine foundation structure for axial steam extraction as claimed in claim 1 or 2, wherein there are two support columns, one of the support columns being located at the front side of the fourth infill wall, and the other support column being located at the rear side of the fourth infill wall.
5. The steam turbine base structure for the axial steam exhaust of claim 4, wherein a span beam is fixedly connected between the two support columns, the span beam penetrates through the fourth infilled wall along a shafting direction, and the two support columns and the span beam form an H-shaped support structure.
6. The steam turbine base structure for axial steam exhaust of claim 4, wherein the fourth infill wall is a reinforced concrete wall, the support pillar and the two fourth columns are both reinforced concrete columns, and the fourth infill wall, the support pillar and the two fourth columns are integrally cast.
7. The turbine foundation structure for axial steam extraction as claimed in claim 1 or 2, wherein the height of the fourth infill wall is greater than one third of the height of the fourth column and the height of the fourth infill wall is less than one half of the height of the fourth column.
8. The steam turbine foundation structure for axial steam extraction as recited in claim 1, wherein the third support structure includes two third pillars, and a third infill wall disposed between the two third pillars, the third infill wall being fixedly connected to the two third pillars, respectively, and a height of the third infill wall being less than a height of the fourth infill wall.
9. The steam turbine base structure for axial steam extraction as recited in claim 1, wherein top longitudinal beams are connected between the first support structure, the second support structure, the third support structure and the fourth support structure, two top longitudinal beams are arranged in parallel and at intervals, and the two top longitudinal beams are symmetrically arranged on two sides of a shafting center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111547672.0A CN114319578A (en) | 2021-12-15 | 2021-12-15 | Steam turbine base structure for axial steam exhaust |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111547672.0A CN114319578A (en) | 2021-12-15 | 2021-12-15 | Steam turbine base structure for axial steam exhaust |
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| CN114319578A true CN114319578A (en) | 2022-04-12 |
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| CN202111547672.0A Pending CN114319578A (en) | 2021-12-15 | 2021-12-15 | Steam turbine base structure for axial steam exhaust |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202247941U (en) * | 2011-10-13 | 2012-05-30 | 河北省电力勘测设计研究院 | Foundation of steam turbogenerator |
| CN202644568U (en) * | 2012-06-29 | 2013-01-02 | 中广核工程有限公司 | Turbine generator base |
| CN203115407U (en) * | 2013-03-21 | 2013-08-07 | 中国电力工程顾问集团华东电力设计院 | Base supporting system of two-time reheating steam turbine generator unit |
| CN204239982U (en) * | 2014-11-28 | 2015-04-01 | 江西省电力设计院 | Double reheat pedestal |
| CN108222055A (en) * | 2018-02-28 | 2018-06-29 | 广东天安项目管理有限公司 | A kind of Foundation of Steam Turbogenerater and main building integral system |
-
2021
- 2021-12-15 CN CN202111547672.0A patent/CN114319578A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202247941U (en) * | 2011-10-13 | 2012-05-30 | 河北省电力勘测设计研究院 | Foundation of steam turbogenerator |
| CN202644568U (en) * | 2012-06-29 | 2013-01-02 | 中广核工程有限公司 | Turbine generator base |
| CN203115407U (en) * | 2013-03-21 | 2013-08-07 | 中国电力工程顾问集团华东电力设计院 | Base supporting system of two-time reheating steam turbine generator unit |
| CN204239982U (en) * | 2014-11-28 | 2015-04-01 | 江西省电力设计院 | Double reheat pedestal |
| CN108222055A (en) * | 2018-02-28 | 2018-06-29 | 广东天安项目管理有限公司 | A kind of Foundation of Steam Turbogenerater and main building integral system |
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