CN203548335U - Volute structure for main helium fan of high-temperature gas cooled reactor - Google Patents
Volute structure for main helium fan of high-temperature gas cooled reactor Download PDFInfo
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- CN203548335U CN203548335U CN201320614227.6U CN201320614227U CN203548335U CN 203548335 U CN203548335 U CN 203548335U CN 201320614227 U CN201320614227 U CN 201320614227U CN 203548335 U CN203548335 U CN 203548335U
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Abstract
The utility model provides a volute structure for a main helium fan of a high-temperature gas cooled reactor. The volute structure comprises a main body runner which is formed by a bottom plate, a volute base, a cover plate and a volute shell, wherein the main body runner is divided into two centrally symmetrical sub runners by virtue of spiral plates, baffle plates and outlet arc column shells which are symmetrical in pairs in the main body runner; each sub runner is corresponding to one round outlet; the tops of the baffle plates and the cover plate are welded, and the outer diameter surfaces of the baffle plates and the volute shell are welded; the inlet ends of the spiral plates and the bottoms of the baffle plates are welded, the outlet ends of the spiral plates and the bottom plate are welded, the outer diameter sides of the spiral plates and the volute shell are welded, and the inner diameter sides of the spiral plates and the volute base are welded; the outlet arc column shells are arranged at the peripheries of the corresponding round outlets; the round outlets and the spiral plates are positioned on the same side of the outlet arc column shells, the bottoms of the outlet arc column shells and the bottom plate are welded, and the top of each outlet arc column shell and the spiral plate of the other sub runner are welded. The volute structure can be structurally matched with a sealing structure of the main helium fan of the high-temperature gas cooled reactor for use, can meet the restriction on a pressure vessel of a steam generator in term of size, and can functionally meet the use requirement of the main helium fan of the high-temperature gas cooled reactor with less flow resistance and higher diffusion efficiency.
Description
Technical field
The utility model relates to reactor engineering technical field, is specifically related to a kind of worm frame for high temperature gas cooled reactor Helium fan.
Background technique
High temperature gas cooled reactor is to take graphite as the high-temperature reactor that moderator, helium are 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 steam generator pressurized container 5 ' to HTGR Nuclear Power Plant one loop 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, and in reactor-loop inside, carries out forced circulation, from reactor core, takes away heat and heats up, and the steam generator of flowing through, passes to the water of secondary circuit by heat and lower the temperature, and forms closed cycle.Helium fan 4 ' is vertical, is arranged on directly over steam generator pressurized container 5 '.
Particularity due to high temperature gas cooled reactor Helium fan application and structure, for its maintenance, designed a kind of sealing configuration specially: sealing structure comprises the three eccentric butterfly valve of Helium fan suction port, spiral case and three same structures, totally as shown in Figure 2, concrete the Nomenclature Composition and Structure of Complexes is shown in invention < < sealing configuration > > (patent No.: 201110131547.1) for maintenance of helium circulator of high temperature gas-cooled reactor.In Fig. 2, sequence number 5 ' represents steam generator pressurized container, and 6 ' represents suction port, and 7 ' represents spiral case, and 8 '-10 ' represents the three eccentric butterfly valve of three same structures.This sealing configuration mainly has following two advantages:
1) prevent that Helium fan when maintenance has a radioactive loop helium and leak staff and environment are caused to adverse effect.
2) when Helium fan overhauls, keep a loop helium gas cooling agent purity, shorten the nuclear power station repair time, reduce the nuclear power station cost of overhaul.
As seen from Figure 2, for 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 to say, Helium fan spiral case need to be collected the helium flowing out from vane diffuser circumference, and is guided to two outlet ports.The second, when helium flows out from vane diffuser, speed is in the horizontal plane perpendicular to Helium fan axle, and speed is positioned at the upright plane that is parallel to axle while flowing out spiral case outlet.If adopt invention < < sealing configuration > > (patent No.: worm frame 201110131547.1) for maintenance of helium circulator of high temperature gas-cooled reactor, helium will rotate to an angle at horizontal plane, axially after decline certain altitude, turn back 90 ° from upright plane outflow simultaneously again from vane diffuser flows out, and helium is done complicated spiralling in spiral case.Flow in Helium fan spiral case here larger with the existence of flowing in common double volute different.For common double volute, flowing, is generally that fluid flows to and flows out at the horizontal plane perpendicular to turbomachine axle, as shown in Figure 3.This different mobile correspondence be that flow losses increase.The 3rd, the size of spiral case must meet the constraint of steam generator pressurized container 5 ', and 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 because radial dimension and axial dimension are limited here, inner spiral casing design cannot realize.In sum, for high temperature gas cooled reactor Helium fan, must carry out specialized designs to spiral case, thereby reduce flow resistance and the extension pressur efficiency that improves Helium fan Diffuser in spiral case.
Summary of the invention
The problem existing in order to solve above-mentioned prior art, the purpose of this utility model is to provide a kind of worm frame for high temperature gas cooled reactor Helium fan, in its structure, can be used in conjunction with high temperature gas cooled reactor Helium fan sealing configuration, in size, meet the constraint of steam generator pressurized container, in function, can meet with the extension pressur efficiency of less flow resistance and Geng Gao the usage requirement of high temperature gas cooled reactor Helium fan.
For reaching above object, the utility model adopts following technological scheme:
A kind of worm frame for high temperature gas cooled reactor Helium fan, 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, the spiral case shell outside spiral case base and cover plate, on base plate, have two centrosymmetric round exits, the cavity between the outer diametric plane of the upper surface of described base plate, spiral case base and spiral case internal diameter of outer cover face forms main body runner; Spiral plate, baffle plate and the outlet circular arc post shell of symmetry between two that main body runner is arranged in it are separated into two centrosymmetric runners, the corresponding round exit of each runner; Axial end and cover plate welding on described baffle plate, outer diametric plane and the welding of spiral case shell; Axial end welding under the entrance point of described spiral plate and baffle plate, outlet end and base plate welding, the outside diameter of spiral plate and the welding of spiral case shell, internal side diameter and the welding of 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 and base plate weld, the spiral plate welding of upper axial end and another runner.
The outside diameter of described spiral case shell is that cylinder is worn outward flange, for spiral case, is connected with steam generator pressurized container, and its outside diameter size is subject to the constraint of steam generator pressurized container; The internal side diameter of described spiral case shell is cylndrical surface, at axial and horizontal direction corner cavetto arc, carries out transition.
Described spiral case base is hollow columnar cylindrical body, and its aperture surface shape is subject to the shape constraining of impeller cover, between aperture surface and outer diametric plane, leaves cavity, and on hollow columnar cylindrical body, axle head is arranged base.
The outer rim cavetto of described base, is connected with the outer diametric plane of spiral case base by flow guiding inclined plate.
Described baffle plate is concordant against the outer circumferential face of air-flow circular movement and the entrance point end face of spiral plate, and aperture surface overlaps with the trailing edge face of the stator that is connected.
Between described spiral plate and base plate, along circumference, a plurality of spiral plates are set and support floor, described spiral plate supports floor lower shaft end face and base plate welding, upper axial end and spiral plate welding.
Between described base plate and round exit, changeover portion is set.
Compared to the prior art, tool has the following advantages the utility model:
(1) in structure, comprise two round exits, can be used in conjunction with high temperature gas cooled reactor Helium fan sealing configuration.
(2) in size, meet the constraint of steam generator pressurized container.
(3) by structure characteristics such as spiral plate, flow guiding inclined plate, changeover portions, can meet with the extension pressur efficiency of less flow resistance and Geng Gao the usage requirement of high temperature gas cooled reactor Helium fan.
(4) simple in structure, be easy to processing.
Accompanying drawing explanation
Fig. 1 is prior art HTGR Nuclear Power Plant one loop 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 structural representation.
Fig. 4 is the utility model embodiment high temperature gas cooled reactor Helium fan worm frame plan view.
Fig. 5 is the utility model embodiment high temperature gas cooled reactor Helium fan worm frame plan view.
Fig. 6 is the utility model embodiment high temperature gas cooled reactor Helium fan spiral case main body runner semi-section graphics.
Fig. 7 is the utility model embodiment high temperature gas cooled reactor Helium fan worm frame graphics.
Fig. 8 is the utility model embodiment high temperature gas cooled reactor Helium fan spiral case semi-section graphics.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As shown in Figure 4 and Figure 5, a kind of worm frame for high temperature gas cooled reactor Helium fan of the utility model, 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 tops, be placed on base plate 16, the spiral case shell 13 outside spiral case base 18 and cover plate 17, on base plate 16, have two centrosymmetric round exits, the cavity between the outer diametric plane of the upper surface of described base plate 16, spiral case base 18 and spiral case shell 13 aperture surfaces forms main body runner; Spiral plate, baffle plate and the outlet circular arc post shell of symmetry between two that main body runner is arranged in it are separated into two centrosymmetric runners, 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, adds " first " before each component names of first flow, adds " second " before each component names of the second runner.
The main body flow passage structure of paper the utility model spiral case 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 cylinder is worn outward flange, for spiral case, is connected with steam generator pressurized container 5 '; Outside diameter size is subject to the constraint of steam generator pressurized container 5 '; The internal side diameter of spiral case shell 13 is also cylndrical surface, at axial and horizontal direction corner cavetto arc, carries out transition to reduce flow losses.
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.
In order to support the use with sealing configuration with high temperature gas cooled reactor Helium fan, on base plate 16, have two centrosymmetric the first round exits 11 and the second round exit 10.
Next introduce the structure of first flow.
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 15 pairs of main body runners of the first outlet circular arc post shell.
First flow is mainly flowed by the first spiral plate 2 guiding.An axial end of the first spiral plate 2 near the first round exit 11, with base plate 16 welding, this end is called to " outlet end "; Another axial end of the first spiral plate 2 and the one one baffle plate 4 welding, be called " entrance point " by this end.The outside diameter of the first spiral plate 2 and 13 welding of spiral case shell, internal side diameter and spiral case base 18 and flow guiding inclined plate 20 welding.Between the first spiral plate 2 and base plate 16, along circumference, a plurality of spiral plates are set and support floor 12, for supporting the first spiral plate 2, strengthen its rigidity.
The one one baffle plate the 4, the 1 baffle plate 6, the 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 of the one one baffle plate 4 (lower axial end) welds with the entrance point of the first spiral plate 2; Top (upper axial end) and cover plate 17 welding.For vaned diffuser, one of them blade trailing edge face welding of internal side diameter and stator 1; Outside diameter and 13 welding of spiral case shell; A face of circumferencial direction is the extension of the blade pressure surface of welding 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, with the blade trailing edge thickness direction of welding is consistent mutually with it, is called " inner peripheral surface ".
For vaned diffuser, the blade selection principle welding mutually with the internal side diameter of the one one baffle plate 4: blade trailing edge is positioned at the axle top of the second round exit 10, contrary air-flow circular movement direction several angle place, guarantees that air-flow enters into first flow by free-flow rule from 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 guiding and flow, reduce loss.The one or two baffle plate 6 and the one one baffle plate 4 weld with identical blade trailing edge.Weld with the entrance point place of contiguous the first spiral plate 2 bottom of the one or two baffle plate 6 (lower axial end); Top (upper axial end) and cover plate 17 welding; Internal side diameter and the welding of welding blade trailing edge face; Outside diameter and 13 welding of spiral case shell; A face of circumferencial direction is the extension of the blade suction surface of welding 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, with the blade trailing edge thickness direction of welding is consistent mutually with it, is referred to as " inner peripheral surface ".Between the one one baffle plate 4 and the one or two baffle plate 6, arrange that a plurality of baffle plates support floor 22, for strengthening the rigidity of the one one baffle plate 4 and the one or two baffle plate 6.For vaneless diffuser, the location arrangements of the position of the one one baffle plate 4 and the one or two baffle plate 6 during according to vaned diffuser.Baffle arrangement is not limited to this structure that the present embodiment is mentioned, and can also be other structure, and for example the one one baffle plate 4 and the one or two baffle plate 6 are merged into a baffle plate piece.No matter be what structural type, baffle position at least needs to guarantee 3 points with shape: one, the baffle plate outer circumferential face of contrary air-flow circular movement direction (outer circumferential face of corresponding the one one baffle plate 4) is concordant with the entrance point end face of the first spiral plate 2; Two, the shape of the baffle plate outer circumferential face of favorable current circular movement direction (outer circumferential face of corresponding the one or two baffle plate 6) should guarantee that air-flow flows by free-flow rule as far as possible; Three,, for vaned diffuser, guarantee that the aperture surface of baffle plate and the trailing edge face of the stator that is connected overlap.
The first outlet circular arc post shell 15 is arranged on the first round exit 11 peripheries, the 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 and base plate 16 welding, upper axial end and secondary spiral lamina 3 welding.The outside diameter of the first outlet circular arc post shell 15 and 13 welding of spiral case shell, internal side diameter and spiral case base 18 and flow guiding inclined plate 20 welding.
Between base plate 16 and the first round exit 11, adopt First Transition section 9 to be connected.First Transition section 9 is chamfering, and make gas is not vertical commutation when base plate 16 flows to the first round exit 11, but cushions by First Transition section 9, reduces flow resistance.
Working principle of the present utility model is: due to the compartmentation of baffle plate, spiral plate, outlet circular arc post shell, the a part of gas flowing out from stator 1 will flow out from the first round exit 11 by first flow, and another part gas will flow 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, the outer circumferential face of the one one baffle plate 4 of take is reference, along gas circumferential movement direction, along with the change of circumference angle is large, flow increases, and corresponding spiral case area of passage also increases, and guarantees 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 utility model changes the axial height of gas flow gradually by spiral plate, avoided turning to suddenly, can reduce significantly flow resistance; In addition, changeover portion, flow guiding inclined plate 20, stator base 21 external diameters being set in the structure of spiral case and leading the features such as circular arc, is also to consider from fluid-mechanics point of view, by these structure characteristics, reduces flow resistance.
For vaned diffuser, the worm frame providing due to the utility model embodiment comprises centrosymmetric two runners, and the baffle plate of two runners respectively with stator 1 in a blade weld mutually, so stator 1 should have even number blade, to guarantee structure and mobile symmetry properties.
In sum, the worm frame that the utility model provides, by spiral plate, realize air-flow on the horizontal plane flowing out before spiral case and be transitioned into gradually from the first round exit 11 and the second round exit 10 and axially flow out, to support the use with maintenance structure with high temperature gas cooled reactor Helium fan; In addition, under the prerequisite of dimension constraint that meets steam generator pressurized container 5 ', by structural features such as spiral plate, changeover portion, flow guiding inclined plates 20, guarantee to flow evenly as far as possible, reduce flow resistance, improve diffusion effect; Finally, this worm frame is simple, is easy to processing.
Claims (7)
1. the worm frame for high temperature gas cooled reactor Helium fan, 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, the spiral case shell outside spiral case base and cover plate, on base plate, have two centrosymmetric round exits, the cavity between the outer diametric plane of the upper surface of described base plate, spiral case base and spiral case internal diameter of outer cover face forms main body runner; Spiral plate, baffle plate and the outlet circular arc post shell of symmetry between two that main body runner is arranged in it are separated into two centrosymmetric runners, the corresponding round exit of each runner; Axial end and cover plate welding on described baffle plate, outer diametric plane and the welding of spiral case shell; Axial end welding under the entrance point of described spiral plate and baffle plate, outlet end and base plate welding, the outside diameter of spiral plate and the welding of spiral case shell, internal side diameter and the welding of 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 and base plate weld, the spiral plate welding of upper axial end and another runner.
2. a kind of worm frame for high temperature gas cooled reactor Helium fan according to claim 1, it is characterized in that: the outside diameter of described spiral case shell is that cylinder is worn outward flange, for spiral case, be connected with steam generator pressurized container, its outside diameter size is subject to the constraint of steam generator pressurized container; The internal side diameter of described spiral case shell is cylndrical surface, at axial and horizontal direction corner cavetto arc, carries out transition.
3. a kind of worm frame for high temperature gas cooled reactor Helium fan according to claim 1, it is characterized in that: described spiral case base is hollow columnar cylindrical body, its aperture surface shape is subject to the shape constraining of impeller cover, between aperture surface and outer diametric plane, leave cavity, on hollow columnar cylindrical body, axle head is arranged base.
4. a kind of worm frame for high temperature gas cooled reactor Helium fan according to claim 3, is characterized in that: the outer rim cavetto of described base, is connected with the outer diametric plane of spiral case base by flow guiding inclined plate.
5. a kind of worm frame for high temperature gas cooled reactor Helium fan according to claim 1, it is characterized in that: described baffle plate is concordant against the outer circumferential face of air-flow circular movement and the entrance point end face of spiral plate, for vaned diffuser, baffle plate aperture surface overlaps with the trailing edge face of the stator that is connected.
6. a kind of worm frame for high temperature gas cooled reactor Helium fan according to claim 1, it is characterized in that: between described spiral plate and base plate, along circumference, a plurality of spiral plates are set and support floor, described spiral plate supports floor lower shaft end face and base plate welding, upper axial end and spiral plate welding.
7. a kind of worm frame for high temperature gas cooled reactor Helium fan according to claim 1, is characterized in that: between described base plate and round exit, changeover portion is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614227.6U CN203548335U (en) | 2013-09-30 | 2013-09-30 | Volute structure for main helium fan of high-temperature gas cooled reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320614227.6U CN203548335U (en) | 2013-09-30 | 2013-09-30 | Volute structure for main helium fan of high-temperature gas cooled reactor |
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| Publication Number | Publication Date |
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| CN203548335U true CN203548335U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320614227.6U Expired - Lifetime CN203548335U (en) | 2013-09-30 | 2013-09-30 | Volute structure for main helium fan of high-temperature gas cooled reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486084A (en) * | 2013-09-30 | 2014-01-01 | 清华大学 | High-temperature gas cooled reactor main helium fan volute structure |
| CN104879308A (en) * | 2014-06-30 | 2015-09-02 | 广东美的环境电器制造有限公司 | Fan |
-
2013
- 2013-09-30 CN CN201320614227.6U patent/CN203548335U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486084A (en) * | 2013-09-30 | 2014-01-01 | 清华大学 | High-temperature gas cooled reactor main helium fan volute structure |
| CN103486084B (en) * | 2013-09-30 | 2015-08-19 | 清华大学 | A kind of high temperature gas cooled reactor main helium fan volute structure |
| CN104879308A (en) * | 2014-06-30 | 2015-09-02 | 广东美的环境电器制造有限公司 | Fan |
| CN104879308B (en) * | 2014-06-30 | 2018-01-30 | 广东美的环境电器制造有限公司 | Fan |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
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| CX01 | Expiry of patent term |