CN103486084B - A kind of high temperature gas cooled reactor main helium fan volute structure - Google Patents
A kind of high temperature gas cooled reactor main helium fan volute structure Download PDFInfo
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- CN103486084B CN103486084B CN201310462623.6A CN201310462623A CN103486084B CN 103486084 B CN103486084 B CN 103486084B CN 201310462623 A CN201310462623 A CN 201310462623A CN 103486084 B CN103486084 B CN 103486084B
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- 239000001307 helium Substances 0.000 title claims abstract description 49
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 49
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000007789 gas Substances 0.000 title claims abstract description 37
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 abstract description 10
- 238000003466 welding Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 description 7
- 239000002826 coolant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000659 freezing mixture Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 210000002275 spiral lamina Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of high temperature gas cooled reactor main helium fan volute structure, comprise the main body runner that base plate, spiral case base, cover plate and spiral case shell are formed, main body runner is separated into two centrosymmetric runners by symmetrical between two spiral plate, baffle plate and the outlet circular arc post shell arranged in it, the corresponding round exit of each runner; Baffle plate top is welded with cover plate, and outer diameter face is welded with spiral case shell; Spiral plate entrance point and baffle plate bottom welding, outlet end welds with base plate, and outside diameter welds with spiral case shell, and internal side diameter welds with spiral case base; It is peripheral that outlet circular arc post shell is arranged on corresponding round exit, and round exit and spiral plate are in outlet circular arc post shell the same side, and bottom is welded with base plate, and top is welded with the spiral plate of another runner; In structure of the present invention can with high temperature gas cooled reactor Helium fan sealing configuration with the use of, size meets the constraint of boiler pressure container, functionally can meet the usage requirement of high temperature gas cooled reactor Helium fan with the extension pressur efficiency of less flow resistance and Geng Gao.
Description
Technical field
The present invention relates to reactor engineering technical field, be specifically related to a kind of high temperature gas cooled reactor main helium fan volute structure.
Background technique
The high-temperature reactor that high temperature gas cooled reactor is take graphite as moderator, helium is freezing mixture is that a kind of inherent safety is good, generating efficiency is high, purposes advanced nuclear reactor very widely.As shown in Figure 1, it comprises reactor pressure vessel 1 ' and boiler pressure container 5 ' to HTGR Nuclear Power Plant primary Ioops general structure, adopts hot gas conduit 3 ' to connect therebetween.Reactor core is by helium gas cooling.Helium gas cooling agent rated pressure 7MPa, relies on Helium fan to drive, carries out forced circulation, take away heat and heat up from reactor core, flow through steam generator, heat passed to the water of secondary circuit and lower the temperature in reactor-loop inside, form closed cycle.Helium fan 4 ' is vertical, is arranged on directly over boiler pressure container 5 '.
Due to the particularity of high temperature gas cooled reactor Helium fan application and structure, a kind of sealing configuration is devised specially: sealing structure comprises the three eccentric butterfly valve of Helium fan suction port, spiral case and three same structures for its maintenance, totally as shown in Figure 2, concrete the Nomenclature Composition and Structure of Complexes is shown in invention " a kind of sealing configuration for the maintenance of helium circulator of high temperature gas-cooled reactor " (patent No.: 201110131547.1).In Fig. 2, sequence number 5 ' represents boiler pressure container, and 6 ' represents suction port, and 7 ' represents spiral case, 8 '-10 ' three eccentric butterfly valve of three same structures is represented.This sealing configuration mainly has following two advantages:
1) there is when preventing Helium fan from overhauling radioactive primary Ioops helium leak and cause adverse effect to staff and environment.
2) keep primary Ioops helium gas cooling agent purity during Helium fan maintenance, shorten the nuclear power station repair time, reduce the nuclear power station cost of overhaul.
As seen from Figure 2, in order to the sealing configuration shown in application drawing 2, Helium fan spiral case must have two outlets, corresponding with the import of three eccentric butterfly valve 9 ' and 10 ' respectively.That is, Helium fan spiral case needs to collect the helium flowed out from vane diffuser circumference, and is guided to two outlet ports.The second, helium flows out hourly velocity from vane diffuser and is in horizontal plane perpendicular to Helium fan axle, and flows out volute outlet hourly velocity and be positioned at the upright plane being parallel to axle.If adopt invention " a kind of sealing configuration for maintenance of helium circulator of high temperature gas-cooled reactor " (patent No.: worm frame 201110131547.1), helium will be turned back 90 ° after axial decline certain altitude again and flow out from upright plane from being rotated to an angle at horizontal plane after vane diffuser flows out, simultaneously, and namely helium does complicated spiralling in spiral case.Here in Helium fan spiral case flowing and common double volute interior flow exist larger different.For the flowing of common double volute, be generally that fluid flows at the horizontal plane perpendicular to turbomachine axle and flows out, as shown in Figure 3.This different flowing correspondence be flow losses increase.3rd, the size of spiral case must meet the constraint of boiler pressure container 5 ', and namely spiral case external diameter remains unchanged.In order to keep spiral case external diameter constant, be easy to expect adopting more common inner spiral casing form.But, due to radial dimension here and axial dimension limited, inner spiral casing design cannot realize.In sum, for high temperature gas cooled reactor Helium fan, specialized designs must be carried out to spiral case, thus reduce the extension pressur efficiency of flow resistance and raising Helium fan Diffuser in spiral case.
Summary of the invention
In order to solve above-mentioned prior art Problems existing, the object of the present invention is to provide a kind of high temperature gas cooled reactor main helium fan volute structure, in its structure can with high temperature gas cooled reactor Helium fan sealing configuration with the use of, size meets the constraint of boiler pressure container, functionally can meet the usage requirement of high temperature gas cooled reactor Helium fan with the extension pressur efficiency of less flow resistance and Geng Gao.
For reaching above object, the present invention adopts following technological scheme:
A kind of high temperature gas cooled reactor main helium fan volute structure, comprise base plate, be placed in the spiral case base on base plate, be placed in the cover plate on spiral case base top, be placed on base plate, spiral case shell outside spiral case base and cover plate, base plate has two centrosymmetric round exits, and the cavity between the upper surface of described base plate, the outer diameter face of spiral case base and spiral case internal diameter of outer cover face forms main body runner; Main body runner is separated into two centrosymmetric runners by symmetrical between two spiral plate, baffle plate and the outlet circular arc post shell arranged in it, the corresponding round exit of each runner; On described baffle plate, axial end welds with cover plate, and outer diameter face is welded with spiral case shell; Under the entrance point of described spiral plate and baffle plate, axial end face weld connects, and outlet end welds with base plate, and the outside diameter of spiral plate welds with spiral case shell, and internal side diameter welds with spiral case base; It is peripheral that described outlet circular arc post shell is arranged on corresponding round exit, and round exit and spiral plate are in outlet circular arc post shell the same side, and under outlet circular arc post shell, axial end welds with base plate, and upper axial end welds with the spiral plate of another runner.
The outside diameter of described spiral case shell is that outward flange worn by cylinder, is connected with boiler pressure container for spiral case, and its outside diameter size is by the constraint of boiler pressure container; The internal side diameter of described spiral case shell is cylndrical surface, carries out transition in axis and horizontal direction corner cavetto arc.
Described spiral case base is hollow columnar cylindrical body, and its aperture surface shape, by the shape constraining of impeller cover, leaves cavity between aperture surface and outer diameter face, and on hollow columnar cylindrical body, axle head arranges base.
The outer rim cavetto of described base, is connected by the outer diameter face of flow guiding inclined plate with spiral case base.
Described baffle plate against the outer circumferential face of air-flow circular movement and the entrance point end face of spiral plate concordant, aperture surface overlaps with the trailing edge face of the stator that is connected.
Circumferentially arrange multiple spiral plate between described spiral plate and base plate and support floor, described spiral plate supports floor lower shaft end face and welds with base plate, and upper axial end is welded with spiral plate.
Between described base plate and round exit, changeover portion is set.
Compared to the prior art, tool has the following advantages in the present invention:
(1) structure comprises two round exits, can with high temperature gas cooled reactor Helium fan sealing configuration with the use of.
(2) size meets the constraint of boiler pressure container.
(3) by structure characteristics such as spiral plate, flow guiding inclined plate, changeover portions, the usage requirement of high temperature gas cooled reactor Helium fan can be met with the extension pressur efficiency of less flow resistance and Geng Gao.
(4) structure is simple, is easy to processing.
Accompanying drawing explanation
Fig. 1 is prior art HTGR Nuclear Power Plant primary Ioops general structure schematic diagram.
Fig. 2 is the sealed structural representation for maintenance of helium circulator of high temperature gas-cooled reactor.
Fig. 3 is common double-volute structure schematic diagram.
Fig. 4 is embodiment of the present invention high temperature gas cooled reactor main helium fan volute structure plan view.
Fig. 5 is embodiment of the present invention high temperature gas cooled reactor main helium fan volute structure plan view.
Fig. 6 is embodiment of the present invention high temperature gas cooled reactor Helium fan spiral case main body runner semi-section graphics.
Fig. 7 is embodiment of the present invention high temperature gas cooled reactor main helium fan volute structure graphics.
Fig. 8 is embodiment of the present invention high temperature gas cooled reactor Helium fan spiral case semi-section graphics.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 4 and Figure 5, a kind of high temperature gas cooled reactor main helium fan volute structure of the present invention, comprise base plate 16, be placed in the spiral case base 18 on base plate 16, be placed in the cover plate 17 on spiral case base 18 top, be placed on base plate 16, spiral case shell 13 outside spiral case base 18 and cover plate 17, base plate 16 has two centrosymmetric round exits, and the cavity between the upper surface of described base plate 16, the outer diameter face of spiral case base 18 and spiral case shell 13 aperture surface forms main body runner; Main body runner is separated into two centrosymmetric runners by symmetrical between two spiral plate, baffle plate and the outlet circular arc post shell arranged in it, the corresponding round exit of each runner; Two centrosymmetric runners are called " first flow " and " the second runner ".The structure of two runners is identical with parts, in order to distinguish, before each component names of first flow, add " first ", before each component names of the second runner, add " second ".
First the main body flow passage structure of spiral case of the present invention is introduced below.
As shown in Figure 6, the main body runner of spiral case is formed by spiral case shell 13, cover plate 17, base plate 16, flow guiding inclined plate 20 and spiral case base 18.
Wherein, the outside diameter of spiral case shell 13 is that outward flange worn by cylinder, is connected with boiler pressure container 5 ' for spiral case; Outside diameter size is by the constraint of boiler pressure container 5 '; The internal side diameter of spiral case shell 13 is also cylndrical surface, carries out transition to reduce flow losses in axis and horizontal direction corner cavetto arc.
For vaned diffuser, cover plate 17 welds with the upper axial height face of stator 1.For vaneless diffuser, cover plate height should meet the designing requirement of runner.
Spiral case base 18 is hollow columnar cylindrical body, and its aperture surface shape, by the shape constraining of impeller cover, leaves cavity 19, its objective is and alleviate spiral case weight between aperture surface and outer diameter face, convenient installation and maintenance.On hollow columnar cylindrical body, axle head arranges base 21, and the outer rim cavetto of base 21, is connected by the outer diameter face of flow guiding inclined plate 20 with spiral case base 18.For vaned diffuser, base 21 is arranged stator 1.
In order to support the use with high temperature gas cooled reactor Helium fan sealing configuration, base plate 16 has two centrosymmetric first round exit 11 and the second round exits 10.
Next the structure of first flow is introduced.
As shown in Figure 7 and Figure 8, first flow is separated to form by the first spiral plate the 2, the 1 baffle plate the 4, the 1 baffle plate 6 and the first outlet circular arc post shell 15 pairs of main body runners.
First flow guides flowing primarily of the first spiral plate 2.This end near the first round exit 11, weld with base plate 16, is called " outlet end " by an axial end of the first spiral plate 2; Another axial end of first spiral plate 2 welds with the one one baffle plate 4, is called " entrance point " by this end.The outside diameter of the first spiral plate 2 welds with spiral case shell 13, and internal side diameter welds with spiral case base 18 and flow guiding inclined plate 20.Between first spiral plate 2 and base plate 16, multiple spiral plate being circumferentially set and supporting floor 12, for supporting the first spiral plate 2, strengthening its rigidity.
One one baffle plate the 4, the 1 baffle plate 6, first outlet circular arc post shell 15 and the first spiral plate 2 one are used from and separate first flow and the second runner.Wherein, the bottom (lower axial end) of the one one baffle plate 4 is welded with the entrance point of the first spiral plate 2; Top (upper axial end) is welded with cover plate 17.For vaned diffuser, internal side diameter welds with one of them blade trailing edge face of stator 1; Outside diameter welds with spiral case shell 13; A face of circumferencial direction is the extension of the blade pressure surface welded mutually with it, and tangent with blade pressure surface, is called " outer circumferential face ", and described " outer circumferential face " is concordant with the entrance point end face of the first spiral plate 2; Another face of circumferencial direction is the thickness face of the one one baffle plate 4, and thickness direction is consistent with the blade trailing edge thickness direction welded mutually with it, is called " inner peripheral surface ".
For vaned diffuser, the blade selection principle welded mutually with the internal side diameter of the one one baffle plate 4: above the axle that blade trailing edge is positioned at the second round exit 10, inverse several angle place, air-flow circular movement direction, ensures that air-flow enters into first flow by free-flow rule after stator 1 flows out as far as possible.
For the vaned diffuser pattern in the present embodiment, increase by the one or two baffle plate 6 and guide flowing, reduce loss.One or two baffle plate 6 welds with identical blade trailing edge with the one one baffle plate 4.The bottom (lower axial end) of the one or two baffle plate 6 is welded with the entrance point place of contiguous first spiral plate 2; Top (upper axial end) is welded with cover plate 17; Internal side diameter with weld blade trailing edge face and weld; Outside diameter welds with spiral case shell 13; A face of circumferencial direction is the extension of the blade suction surface welded mutually with it, and tangent with blade suction surface, is referred to as " outer circumferential face "; Another face of circumferencial direction is the thickness face of the one or two baffle plate 6, and thickness direction is consistent with the blade trailing edge thickness direction welded mutually with it, is referred to as " inner peripheral surface ".Arrange between one one baffle plate the 4 and the 1 baffle plate 6 that multiple baffle plate supports floor 22, for strengthening the rigidity of the one one baffle plate the 4 and the 1 baffle plate 6.For vaneless diffuser, the position of the one one baffle plate the 4 and the 1 baffle plate 6 is according to location arrangements during vaned diffuser.Baffle arrangement is not limited to this structure that the present embodiment is mentioned, and can also be other structure, and such as the one one baffle plate the 4 and the 1 baffle plate 6 merges into a baffle plate block.No matter be what structural type, baffle position and shape at least need guarantee three point: one, the baffle plate outer circumferential face (outer circumferential face of corresponding one one baffle plate 4) in inverse air-flow circular movement direction is concordant with the entrance point end face of the first spiral plate 2; Two, the shape of the baffle plate outer circumferential face (outer circumferential face of corresponding one or two baffle plate 6) in favorable current circular movement direction should ensure that air-flow flows by free-flow rule as far as possible; Three, for vaned diffuser, ensure that the aperture surface of baffle plate overlaps with the trailing edge face of the stator that is connected.
It is peripheral that first outlet circular arc post shell 15 is arranged on the first round exit 11, first round exit 11 and the first spiral plate 2 are in the same side of the first outlet circular arc post shell 15, the lower axial end of the first outlet circular arc post shell 15 welds with base plate 16, and upper axial end welds with secondary spiral lamina 3.The outside diameter of the first outlet circular arc post shell 15 welds with spiral case shell 13, and internal side diameter welds with spiral case base 18 and flow guiding inclined plate 20.
First Transition section 9 is adopted to be connected between base plate 16 with the first round exit 11.First Transition section 9 is chamfering, is not vertical commutation, but is cushioned by First Transition section 9 when making gas flow to the first round exit 11 from base plate 16, reduces flow resistance.
Working principle of the present invention is: due to the compartmentation of baffle plate, spiral plate, outlet circular arc post shell, the a part of gas flowed out from stator 1 will be flowed out from the first round exit 11 by first flow, and another part gas will be flowed out from the second round exit 10 by the second runner.For first flow, because the height of the first spiral plate 2 changes twist, with the outer circumferential face of the one one baffle plate 4 for reference, along gas circumferential movement direction, along with the change of circumferential angle is large, flow increases, and corresponding spiral case area of passage also increases, and ensures spiral case overflowing end face flow velocity equal and opposite in direction as far as possible.For the second runner, principle is identical therewith.
The present invention changes the axial height of gas flow gradually by spiral plate, avoids and turns to suddenly, can reduce flow resistance significantly; In addition, changeover portion is set in the structure of spiral case, flow guiding inclined plate 20, stator base 21 external diameter lead the features such as circular arc, be also consider from fluid-mechanics point of view, reduce flow resistance by these structure characteristics.
For vaned diffuser, the worm frame provided due to the embodiment of the present invention comprises centrosymmetric two runners, and the baffle plate of two runners welds mutually with the blade of in stator 1 respectively, so stator 1 should have even number blade, to ensure the symmetry properties of structure and flowing.
In sum, worm frame provided by the invention, air-flow on the horizontal plane flowed out before realizing spiral case by spiral plate is transitioned into gradually and axially flows out, to support the use with high temperature gas cooled reactor Helium fan maintenance structure from the first round exit 11 and the second round exit 10; In addition, under the prerequisite of dimension constraint meeting boiler pressure container 5 ', ensure that flowing evenly, reduces flow resistance by structural features such as spiral plate, changeover portion, flow guiding inclined plates 20 as far as possible, improve diffusion effect; Finally, this worm frame is simple, is easy to processing.
Claims (5)
1. a high temperature gas cooled reactor main helium fan volute structure, it is characterized in that: comprise base plate, be placed in the spiral case base on base plate, be placed in the cover plate on spiral case base top, be placed on base plate, spiral case shell outside spiral case base and cover plate, base plate has two centrosymmetric round exits, and the cavity between the upper surface of described base plate, the outer diameter face of spiral case base and spiral case internal diameter of outer cover face forms main body runner; Main body runner is separated into two centrosymmetric runners by symmetrical between two spiral plate, baffle plate and the outlet circular arc post shell arranged in it, the corresponding round exit of each runner; On described baffle plate, axial end welds with cover plate, and outer diameter face is welded with spiral case shell; Under the entrance point of described spiral plate and baffle plate, axial end face weld connects, and outlet end welds with base plate, and the outside diameter of spiral plate welds with spiral case shell, and internal side diameter welds with spiral case base; It is peripheral that described outlet circular arc post shell is arranged on corresponding round exit, and round exit and spiral plate are in outlet circular arc post shell the same side, and under outlet circular arc post shell, axial end welds with base plate, and upper axial end welds with the spiral plate of another runner; The outside diameter of described spiral case shell is that outward flange worn by cylinder, is connected with boiler pressure container for spiral case, and its outside diameter size is by the constraint of boiler pressure container; The internal side diameter of described spiral case shell is cylndrical surface, carries out transition in axis and horizontal direction corner cavetto arc; Described spiral case base is hollow columnar cylindrical body, and its aperture surface shape, by the shape constraining of impeller cover, leaves cavity between aperture surface and outer diameter face, and on hollow columnar cylindrical body, axle head arranges base.
2. a kind of high temperature gas cooled reactor main helium fan volute structure according to claim 1, be is characterized in that: the outer rim cavetto of described base, is connected by the outer diameter face of flow guiding inclined plate with spiral case base.
3. a kind of high temperature gas cooled reactor main helium fan volute structure according to claim 1, it is characterized in that: described baffle plate against the outer circumferential face of air-flow circular movement and the entrance point end face of spiral plate concordant, for vaned diffuser, baffle plate aperture surface overlaps with the trailing edge face of the stator that is connected.
4. a kind of high temperature gas cooled reactor main helium fan volute structure according to claim 1, it is characterized in that: multiple spiral plate is circumferentially set between described spiral plate and base plate and supports floor, described spiral plate supports floor lower shaft end face and welds with base plate, and upper axial end is welded with spiral plate.
5. a kind of high temperature gas cooled reactor main helium fan volute structure according to claim 1, is characterized in that: arrange changeover portion between described base plate and round exit.
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| CN104992731B (en) * | 2015-07-13 | 2017-04-19 | 清华大学 | Baffle structure of high-temperature gas-cooled reactor primary-helium fan with active and passive characteristics |
| US10943704B2 (en) | 2015-07-13 | 2021-03-09 | Tsinghua University | Baffle structure for channel |
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| CN201513368U (en) * | 2009-10-19 | 2010-06-23 | 浙江双阳风机有限公司 | Centrifugal fan monitoring air in nuclear islands of nuclear power plants |
| CN102032217A (en) * | 2010-12-27 | 2011-04-27 | 中国农业大学 | Method for optimizing dummy plate of double-volute type double-suction pump and product produced with same |
| CN102208217A (en) * | 2011-05-19 | 2011-10-05 | 清华大学 | Sealing structure for maintenance of helium circulator of high temperature gas-cooled reactor |
| CN203548335U (en) * | 2013-09-30 | 2014-04-16 | 清华大学 | Volute structure for main helium fan of high-temperature gas cooled reactor |
-
2013
- 2013-09-30 CN CN201310462623.6A patent/CN103486084B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201513368U (en) * | 2009-10-19 | 2010-06-23 | 浙江双阳风机有限公司 | Centrifugal fan monitoring air in nuclear islands of nuclear power plants |
| CN102032217A (en) * | 2010-12-27 | 2011-04-27 | 中国农业大学 | Method for optimizing dummy plate of double-volute type double-suction pump and product produced with same |
| CN102208217A (en) * | 2011-05-19 | 2011-10-05 | 清华大学 | Sealing structure for maintenance of helium circulator of high temperature gas-cooled reactor |
| CN203548335U (en) * | 2013-09-30 | 2014-04-16 | 清华大学 | Volute structure for main helium fan of high-temperature gas cooled reactor |
Non-Patent Citations (1)
| Title |
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| HTR-PM主氦风机设计研究;周惠忠 汤全法;《中国核学会核能动力学会二〇〇七年学术年会论文汇编》;20080811;第131页，图1 * |
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