CN203978525U - A kind of cylinder structure of steam turbine - Google Patents
A kind of cylinder structure of steam turbine Download PDFInfo
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- CN203978525U CN203978525U CN201420330351.4U CN201420330351U CN203978525U CN 203978525 U CN203978525 U CN 203978525U CN 201420330351 U CN201420330351 U CN 201420330351U CN 203978525 U CN203978525 U CN 203978525U
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- half inner
- inner casings
- casings
- admission
- cylinder
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Abstract
The utility model discloses a kind of cylinder structure of steam turbine, comprise outer shell, inner casing and rotor, outer shell is formed by connecting by axial bolts by front and rear sections cylinder cylinder body, inner casing comprises the first half inner casings and the second half inner casings and looping admission runner after linking into an integrated entity and between rotor, the first half inner casings and the second half junction planes of inner casing and the horizontal center line of the cylinder angle [alpha] that tilts; On the both sides of the first half inner casings and the second half inner casings, relatively offer respectively some bolts hole vertical with junction plane; On the casing wall of the first half inner casings and the second half inner casings, offer respectively an inside admission interface, these two inside admission interfaces be stagger junction plane and with the tangent mode Central Symmetry of admission runner be opened in left and right sides or the upper and lower side of inner casing; Inside admission interface on the casing wall of outer shell on corresponding inner casing is offered two external admission interfaces.Cylinder structure of the present utility model can not interfere with split the position of supporting and positioning mechanism, meets the needs of high-efficiency compact.
Description
Technical field
The utility model relates to a kind of cylinder structure of steam turbine.
Background technique
Cylinder is the critical component of steam turbine, is responsible for bearing huge pressure difference and temperature difference, and the reliability of its structural type has material impact to the Security of steam turbine set, unit efficiency.
At present, the cylinder of the steam turbine of domestic overcritical above parameter, the structural type that inner casing adopts split to connect mostly.The pressure reduction bearing due to cylinder is large, therefore in design, should make it compact Layout as far as possible, is beneficial to pressure-bearing.The mode that the steam turbine of this high parameter extensively adopts sliding pressure-filling to regulate, and be provided with regenerative steam mouth, this just causes increasing of cylinder interface quantity.
The inner casing of cylinder has the structure of horizontal flange and the structure of vertical split conventionally.The structure of vertical split is comprised of the first half inner casings 11 and the second half inner casings 12, and the first half inner casings 11 and the second half inner casings 12 link together by bolt 14, and split 10 is in vertical position.Annular region between inner casing and rotor 13 is admission runner 16; Rotor 13 turns clockwise; Admission interface 15 on inner casing will be avoided the structures such as split 10 and bolt 14, has formed the arrangement (seeing Fig. 1) of a symmetrical admission.The structure of horizontal flange and the structure of above-mentioned vertical split similar (seeing Fig. 2).
The inner casing of the structure of above-mentioned horizontal flange, steam flow vertically enters admission runner, and the direct impact rotor of steam has caused the steam energy loss at admission position.If the arrangement of application tangential admission, can make the flow direction of steam and the sense of rotation of rotor consistent, can reduce steam energy loss, improve admission efficiency.But the inner casing of existing structure is unfavorable for the layout of tangential admission interface, because the small volume of inner casing, the bolt hole on split and tangential admission interface can produce interferes and leakage vapour; And the inner casing of the structure of vertical split is unfavorable for arranging vapor interface near vertical center line.If application tangential admission, and on the inner casing of smaller size smaller the more vapor interface of reasonable Arrangement, become problem demanding prompt solution.
Model utility content
The purpose of this utility model is to overcome the defect of prior art and cylinder structure that a kind of steam turbine is provided, it can guarantee cylinder admission, draw gas, the position of each interface such as filling, steam discharge and cylinder supporting and positioning mechanism can not interfere with the split of inner casing, meet the design needs of the cylinder structure of high-efficiency compact, can also reduce the loss of admission runner, improve the unit efficiency of steam turbine.
The purpose of this utility model is achieved in that a kind of cylinder structure of steam turbine, comprise outer shell, inner casing and rotor, described outer shell is fastenedly connected and is formed by axial bolts by front and rear sections cylinder cylinder body, described inner casing comprises the first half inner casings and the second half inner casings, looping admission runner after this first half inner casing and the second half inner casings link into an integrated entity and between described rotor, wherein
Described the first half inner casings and the second half junction planes of inner casing and the horizontal center line of the described cylinder angle [alpha] that tilts, 180 ° of 0 °, this angle of inclination < α < and these tilt angle alpha ≠ 90 °;
On the both sides of described the first half inner casings and the second half inner casings, relatively offer respectively the vertical bolt hole of some and described junction plane, the first half inner casings and the second half inner casings are linked into an integrated entity to bolt by some;
On the casing wall of described the first half inner casings and the second half inner casings, offer respectively an inside admission interface, these two inside admission interfaces be stagger described junction plane and with the tangent mode Central Symmetry of described admission runner be opened in left and right sides or the upper and lower side of described inner casing, form the eddy current consistent with the sense of rotation of described rotor after making steam enter described admission runner;
Inside admission interface on the casing wall of described outer shell on corresponding described inner casing is offered two external admission interfaces.
The cylinder structure of above-mentioned steam turbine, wherein, described tilt angle alpha=25 °～35 °.
The cylinder structure of above-mentioned steam turbine, wherein, all the serve as reasons outer surface of described the first half inner casings or described the second half inner casings of bolt hole on bolt hole on described the first half inner casings or described the second half inner casings leads to the through hole of immersing oneself in of described junction plane, correspondingly, bolt hole on bolt hole on described the second half inner casings or described the first half inner casings is the tapped blind hole being opened on described junction plane, and described the first half inner casings and the second half inner casings are linked into an integrated entity by some bolts that homonymy is screwed in.
The cylinder structure of above-mentioned steam turbine, wherein, bolt hole on bolt hole on described the first half inner casings and described the second half inner casings is offered in centrosymmetric mode, be that the serve as reasons outer surface of described the first half inner casings of the bolt hole on one side of described the first half inner casings leads to the through hole of immersing oneself in of described junction plane, correspondingly, the serve as reasons outer surface of described the second half inner casings of the bolt hole on one side of described the second half inner casings leads to the through hole of immersing oneself in of described junction plane, the bolt hole of the another side of described the first half inner casings is the tapped blind hole being opened on described junction plane, correspondingly, the another side bolt hole of described the second half inner casings is the tapped blind hole being opened on described junction plane, described the first half inner casings and the second half inner casings are linked into an integrated entity by some bolts that opposite side is screwed in.
The technological scheme of the cylinder structure of steam turbine of the present utility model, by the horizontal center line of the split of inner casing and the cylinder angle that tilts, and the admission interface of cylinder is located to the position that does not interfere and be tangential to admission runner with the split of inner casing, while making initial steam enter admission runner, avoid the direct impact rotor of steam, form the steam eddy current consistent with the sense of rotation of rotor, make steam enter axial passage along rotor direction, thereby avoided steam flow loss, and be conducive to design the cylinder of high-efficiency compact, adapt to the tangential admission in modern steam turbine design, sliding pressure-filling regulative mode and the feature of drawing gas, solved under the interior cylinder structure of traditional horizontal flange or vertical split, interface split easy and inner casing on cylinder produces the problem of interfering, can arrange vapor interface more versatile and flexiblely, meet the demand that diversification solid space is arranged, can also reduce the loss of admission runner, improve the unit efficiency of steam turbine.
Accompanying drawing explanation
Fig. 1 is the structural representation (vertical split) of cylinder of the steam turbine of prior art;
Fig. 2 is the structural representation (horizontal flange) of the inner casing in the cylinder of steam turbine of prior art;
Fig. 3 is the structural representation of the cylinder of steam turbine of the present utility model;
Fig. 4 is the first embodiment's of the inner casing in the cylinder of steam turbine of the present utility model schematic diagram;
Fig. 5 is the second embodiment's of the inner casing in the cylinder of steam turbine of the present utility model schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
First refer to Fig. 3, the cylinder structure of steam turbine of the present utility model, comprises outer shell 1, inner casing 2 and rotor 3, wherein, inner casing 2 comprises the first half inner casings and the second half inner casings, looping admission runner 4 after this first half inner casing and the second half inner casings link into an integrated entity and between rotor 3; On the casing wall of the first half inner casings and the second half inner casings, offer respectively an inside admission interface, these two inside admission interfaces be stagger junction plane and with the tangent mode Central Symmetry of admission runner 4 be opened in left and right sides or the upper and lower side of inner casing, make steam enter the rear formation of admission runner 4 eddy current consistent with the sense of rotation of rotor 3, the axial passage that steam eddy current enters admission runner 4 flows to low voltage side cylinder body; Outer shell 1 is fastenedly connected and is formed by axial bolts by front and rear sections cylinder cylinder body; Inside admission interface on the casing wall of outer shell 1 on corresponding inner casing 2 is offered two external admission interfaces 110.
Refer to Fig. 4, that in figure, show is the first embodiment of the inner casing in the cylinder structure of steam turbine of the present utility model again, and this inner casing comprises the first half inner casing 31 and the second half half inner casings 32, wherein:
The junction plane 30 of the first half inner casings 31 and the second half inner casings 32, i.e. the split of inner casing and the horizontal center line of the cylinder angle [alpha] that tilts, 180 ° of 0 °, this angle of inclination < α < and α ≠ 90 °; This tilt angle alpha can, according to the needs of cylinder arrangement, while being designed to be 25～35 ° from 0 degree to arbitrarily angled value (except horizontal and vertical position), especially tilt angle alpha 180 degree, have better layout effect;
Some bolts hole vertical with junction plane 30 are relatively offered respectively with the both sides of the second half inner casings 32 in the both sides of the first half inner casings 31, and the first half inner casings 31 and the second half inner casings 32 are linked into an integrated entity to bolt by some; Looping admission runner 36 after this first half inner casing 31 and the second half inner casings 32 link into an integrated entity and between rotor 33;
Bolt hole 341 on the first half inner casings 31 of the present embodiment leads to the through hole of immersing oneself in of junction plane 30 for the outer surface by the first half inner casings 31, and correspondingly, the bolt hole 342 on the second half inner casings 32 is for being opened in the tapped blind hole on junction plane 30; Also can be that bolt hole 341 on the first half inner casings 31 is for being opened in the tapped blind hole on junction plane 30 conversely, correspondingly, bolt hole 342 on the second half inner casings 32 is for the outer surface by the second half inner casings 32 leads to the through hole of immersing oneself in of junction plane 30, and the first half inner casings 31 and the second half inner casings 32 are linked into an integrated entity by some bolts that homonymy is screwed in;
On the first half inner casings 31 and the second half inner casings 32, an inside admission interface 35 is set respectively, these two inside admission interfaces 35 are to stagger junction plane 30 be arranged in left and right sides or the upper and lower side of inner casing with the tangent mode of admission runner 36; The inside admission interface 35 of the present embodiment is arranged in the left and right sides of inner casing; If change the tilt angle alpha of junction plane 30, inside admission interface 35 can be arranged on the sky position or other any possible position of inner casing.Equally, the layout of the interface such as the drawing gas of cylinder, filling, steam discharge is also more versatile and flexible.
Refer to Fig. 5, that in figure, show is the second embodiment of the inner casing in the cylinder structure of steam turbine of the present utility model again, and this inner casing comprises the first half inner casings 41 and second half 42, wherein:
The junction plane 40 of the first half inner casings 41 and the second half inner casings 42, i.e. the split of inner casing and the horizontal center line of the cylinder angle [alpha] that tilts, 180 ° of 0 °, this angle of inclination < α < and α ≠ 90 °; This tilt angle alpha can, according to the needs of cylinder arrangement, while being designed to be 25～35 ° from 0 degree to arbitrarily angled value (except horizontal and vertical position), especially tilt angle alpha 180 degree, have better layout effect;
Some bolts hole vertical with junction plane 40 are relatively offered respectively with the both sides of the second half inner casings 42 in the both sides of the first half inner casings 41, and the first half inner casings 41 and the second half inner casings 42 are linked into an integrated entity to bolt by some; Looping admission runner 46 after this first half inner casing 41 and the second half inner casings 42 link into an integrated entity and between rotor 43;
Bolt hole on bolt hole on the first half inner casings 41 of the present embodiment and the second half inner casings 42 is offered in centrosymmetric mode, the bolt hole 441 on one side of the first half inner casings 41 leads to the through hole of immersing oneself in of junction plane 40 for the outer surface by the first half inner casings 41, the bolt hole 441 ' of the another side of the first half inner casings 41 is for being opened in the tapped blind hole on junction plane 40, correspondingly, the bolt hole 442 on one side of the second half inner casings 42 is for being opened in the tapped blind hole on junction plane 40, the bolt hole 442 ' of the another side of the second half inner casings 42 leads to the through hole of immersing oneself in of junction plane 40 for the outer surface by the second half inner casings 42, the first half inner casings 41 and the second half inner casings 42 are linked into an integrated entity by some bolts that opposite side is screwed in,
On the first half inner casings 41 and the second half inner casings 42, an inside admission interface 45 is set respectively, these two inside admission interfaces 45 are to stagger junction plane 40 be arranged in left and right sides or the upper and lower side of cylinder with the tangent mode of admission runner 46; The inside admission interface 45 of the present embodiment is arranged in the left and right sides of inner casing; If change the tilt angle alpha of junction plane 40, inside admission interface 45 can be arranged on the sky position or other any possible position of inner casing.Equally, the layout of the interface such as the drawing gas of cylinder, filling, steam discharge is also more versatile and flexible.
The mode of structure of the present embodiment, makes that two-part of cylinder are approximate presents Central Symmetry, is more conducive to the topology layout of tangential admission.Compare with the structure that bolt screws in from homonymy, the horizontal position that bolt can countercylinder and day position form and disturb, and cylinder space are arranged more flexible.
The cylinder structure of steam turbine of the present utility model, by the horizontal center line of the split of inner casing and the cylinder angle that tilts, and the admission interface of cylinder is located to the position that does not interfere and be tangential to admission runner with the split of inner casing, make steam tangentially enter admission chamber by two admission interfaces, admission runner has been optimized in this tangential admission, the admission angle that coordinates stator blade, can reduce the runner crushing of admission chamber, improve the unit efficiency of steam turbine, and when obtaining efficiengy-increasing, guaranteed the safety and stability of steam turbine.
The cylinder structure of steam turbine of the present utility model, be conducive to design the cylinder of high-efficiency compact, adapt to tangential admission, the sliding pressure-filling regulative mode in modern steam turbine design and the feature of drawing gas, solve under the structure of traditional horizontal flange or vertical split, the problem that interface is easy and split generation is interfered of cylinder, can arrange vapor interface more versatile and flexiblely, meet the demand that diversification solid space is arranged.
Above embodiment is only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, in the situation that not departing from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technological schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.
Claims (4)
1. the cylinder structure of a steam turbine, comprise outer shell, inner casing and rotor, described outer shell is fastenedly connected and is formed by axial bolts by front and rear sections cylinder cylinder body, described inner casing comprises the first half inner casings and the second half inner casings, looping admission runner after this first half inner casing and the second half inner casings link into an integrated entity and between described rotor, it is characterized in that
Described the first half inner casings and the second half junction planes of inner casing and the horizontal center line of the described cylinder angle [alpha] that tilts, 180 ° of 0 °, this angle of inclination < α < and these tilt angle alpha ≠ 90 °;
On the both sides of described the first half inner casings and the second half inner casings, relatively offer respectively the vertical bolt hole of some and described junction plane, the first half inner casings and the second half inner casings are linked into an integrated entity to bolt by some;
On the casing wall of described the first half inner casings and the second half inner casings, offer respectively an inside admission interface, these two inside admission interfaces be stagger described junction plane and with the tangent mode Central Symmetry of described admission runner be opened in left and right sides or the upper and lower side of described inner casing, form the eddy current consistent with the sense of rotation of described rotor after making steam enter described admission runner;
Inside admission interface on the casing wall of described outer shell on corresponding described inner casing is offered two external admission interfaces.
2. the cylinder structure of steam turbine according to claim 1, is characterized in that, described tilt angle alpha=25 °～35 °.
3. the cylinder structure of steam turbine according to claim 1, it is characterized in that, all the serve as reasons outer surface of described the first half inner casings or described the second half inner casings of bolt hole on bolt hole on described the first half inner casings or described the second half inner casings leads to the through hole of immersing oneself in of described junction plane, correspondingly, bolt hole on bolt hole on described the second half inner casings or described the first half inner casings is the tapped blind hole being opened on described junction plane, and described the first half inner casings and the second half inner casings are linked into an integrated entity by some bolts that homonymy is screwed in.
4. the cylinder structure of steam turbine according to claim 1, it is characterized in that, bolt hole on bolt hole on described the first half inner casings and described the second half inner casings is offered in centrosymmetric mode, be that the serve as reasons outer surface of described the first half inner casings of the bolt hole on one side of described the first half inner casings leads to the through hole of immersing oneself in of described junction plane, correspondingly, the serve as reasons outer surface of described the second half inner casings of the bolt hole on one side of described the second half inner casings leads to the through hole of immersing oneself in of described junction plane, the bolt hole of the another side of described the first half inner casings is the tapped blind hole being opened on described junction plane, correspondingly, the another side bolt hole of described the second half inner casings is the tapped blind hole being opened on described junction plane, described the first half inner casings and the second half inner casings are linked into an integrated entity by some bolts that opposite side is screwed in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420330351.4U CN203978525U (en) | 2014-06-20 | 2014-06-20 | A kind of cylinder structure of steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420330351.4U CN203978525U (en) | 2014-06-20 | 2014-06-20 | A kind of cylinder structure of steam turbine |
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| CN203978525U true CN203978525U (en) | 2014-12-03 |
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| CN201420330351.4U Active CN203978525U (en) | 2014-06-20 | 2014-06-20 | A kind of cylinder structure of steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005738A (en) * | 2017-12-05 | 2018-05-08 | 哈尔滨汽轮机厂有限责任公司 | 180 ° of tangential admission low pressure casting inner casings |
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2014
- 2014-06-20 CN CN201420330351.4U patent/CN203978525U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005738A (en) * | 2017-12-05 | 2018-05-08 | 哈尔滨汽轮机厂有限责任公司 | 180 ° of tangential admission low pressure casting inner casings |
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