CN204851779U - Nuclear power system and waste heat excavating pump thereof - Google Patents
Nuclear power system and waste heat excavating pump thereof Download PDFInfo
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- CN204851779U CN204851779U CN201520498127.0U CN201520498127U CN204851779U CN 204851779 U CN204851779 U CN 204851779U CN 201520498127 U CN201520498127 U CN 201520498127U CN 204851779 U CN204851779 U CN 204851779U
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- spiral case
- section
- heat removal
- residual heat
- pump
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Abstract
The utility model discloses a waste heat excavating pump, including the pump body, install in the pump body the stator and with the spiral case of the exit linkage of stator, the runner cross -section of spiral case is crescent to the export of spiral case by entering the mouth of spiral case, a section of thick bamboo is discharged for having a tapered section of thick bamboo to the export and the section of thick bamboo intercommunication of discharging of spiral case, the cross -section of the section of thick bamboo of discharging is crescent to the export of the section of thick bamboo of discharging by the entry of the section of thick bamboo of discharging, discharge axis and the spiral case of a section of thick bamboo the exit mainstream to angle range be 10 to 60. The utility model discloses enlarge fluidic pressure, guaranteed the homogeneity of the inside fluid flow of spiral case, the fluid that can avoid spiral case export causes mobile disorderly and separation when discharging a section of thick bamboo getting into, and that has guaranteed to flow is smooth and easy. The utility model discloses reducing the fluidic pulsation, eliminating simultaneously owing to the flow losses that the motion of fluid swirl caused, the pump case atress improves, and the hydraulic efficiency of pump also can obviously improve. The utility model also discloses a nuclear power system of including above -mentioned waste heat excavating pump.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly a kind of residual heat removal pump.In addition, the utility model also relate to a kind of nuclear power system comprising above-mentioned residual heat removal pump.
Background technique
Residual heat removal pump is one of core two stage pump, is one of visual plant ensureing nuclear plant safety.Primarily of the main overcurrent element composition such as impeller, stator and spiral case.Wherein, spiral case is played a part the liquid of collection stator outflow and is discharged by pipeline by the liquid after pressurization, and the flow velocity usually due to stator inside is too high, and spiral case can play certain boosting.
In existing design, consider the mechanical property of pump case, often become by pump casing design symmetric form, Volute Design to become tubular and constant in circumferential cross-section, expelling tube adopts vertical connection with spiral case.
But the flowing of current in spiral case and expelling tube presents very disorderly state in existing design method.Flowing velocity change in spiral case circumference very greatly; build-up of pressure uneven; part after expelling tube import; flow separation phenomenon is even more serious; usually there will be most of area that a large whirlpool occupies runner; thus blocking is defined to main flow, dissipated while accelerating main flow a large amount of energy, and the nonuniformity of pressure also have impact on the uniform force of pump case simultaneously.The unsteady flow of this fluid and stressed nonuniformity not only make the stressed of pump case occur pulsation and serious nonsymmetry, more increase the vibration of pump case, also make the hydraulic performance of pump greatly decline simultaneously.
Therefore, how reducing the flow losses in spiral case and expelling tube, is the current technical issues that need to address of those skilled in the art.
Model utility content
In view of this, the purpose of this utility model is to provide a kind of residual heat removal pump, and this residual heat removal pump reduces the flow losses in spiral case and excavationg pump, has higher conservancy property.Another object of the present utility model is to provide a kind of nuclear power system comprising above-mentioned residual heat removal pump.
For achieving the above object, the utility model provides following technological scheme:
A kind of residual heat removal pump, the spiral case comprising the pump housing, be installed on the stator in the described pump housing and be connected with the outlet of described stator, the cross section of fluid channel of described spiral case is increased gradually by entrance to the outlet of described spiral case of described spiral case, the outlet of described spiral case is communicated with expelling tube, described expelling tube is the cylinder with tapering, and the cross section of described expelling tube is increased gradually by entrance to the outlet of described expelling tube of described expelling tube; The angular range of the axis of described expelling tube and the outlet port main flow direction of described spiral case is 10 ° to 60 °.
Preferably, the main flow direction in described spiral case, the scope of the area increase multiple of described cross section of fluid channel is 1.02 to 1.05.
Preferably, the main flow direction in described spiral case, it is constant that described area increases multiple.
Preferably, the main flow direction in described spiral case, it is 1.03 that described area increases multiple.
Preferably, the angle of the axis of described expelling tube and the outlet port main flow direction of described spiral case is 30 °.
Preferably, the junction surface of the outlet of described expelling tube and described spiral case is for seamlessly transitting curved surface.
Preferably, described cross section of fluid channel is circular flow channel cross section or oval cross section of fluid channel.
A kind of nuclear power system, comprise residual heat removal pump, described residual heat removal pump is the residual heat removal pump as described in above-mentioned any one.
In the residual heat removal pump that the utility model provides, the cross section of fluid channel of spiral case is increased gradually by entrance to the outlet of spiral case of spiral case, the outlet of spiral case is provided with the expelling tube be communicated with volute outlet, the barrel dliameter of expelling tube is expanding, and the angular range of the axis of expelling tube and the outlet port main flow direction of spiral case is 10 ° to 60 °.Spiral case cross section is set to the variable section structure constantly increased to outlet by entrance by the utility model, the rate of flow of fluid entering spiral case can be made to reduce by the increase in spiral case cross section, the pressure expanding fluid to a certain extent, ensure that the uniformity of spiral case fluid flow inside; On this basis, arranging with the main flow direction angular range of volute outlet by the axis of expelling tube is 10 ° to 60 °, the fluid of volute outlet can be avoided to cause the disorder of flowing when entering expelling tube and be separated, ensure that the smooth and easy of flowing.The pulsation of fluid reduces by the utility model, and eliminate because flow eddies moves the flow losses caused, thus, pump case is stressed to improve, and the hydraulic efficiency of pump also can significantly improve simultaneously.The utility model additionally provides a kind of nuclear power system comprising above-mentioned residual heat removal pump.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 provides by the utility model the longitudinal sectional drawing of residual heat removal pump specific embodiment;
Fig. 2 provides by the utility model the structural representation of spiral case and expelling tube in residual heat removal pump specific embodiment.
Wherein, 1 is impeller, and 2 is stator, and 3 is outlet section, and 4 is spiral case, and 5 is inducer, and 6 is expelling tube.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Core of the present utility model is to provide a kind of residual heat removal pump, and this residual heat removal pump reduces the flow losses in spiral case and expelling tube, has higher conservancy property.Another core of the utility model makes to provide a kind of nuclear power system comprising above-mentioned residual heat removal pump.
Please refer to Fig. 1 and Fig. 2, Fig. 1 provides by the utility model the longitudinal sectional drawing of residual heat removal pump specific embodiment; Fig. 2 provides by the utility model the structural representation of spiral case and expelling tube in residual heat removal pump specific embodiment.Wherein, 1 is impeller, and 2 is stator, and 3 is outlet section, and 4 is spiral case, and 5 is inducer, and 6 is expelling tube.
A kind of residual heat removal pump provided by the utility model, mainly comprises the pump housing, stator 2 and spiral case 4.Stator 2 and spiral case 4 are all arranged in the pump housing, and the inducer 5 of pump is provided with impeller 1, and the outlet of impeller 1 connects the entrance of stator 2, and the outlet of stator 2 connects the entrance of spiral case 4, after the reduction of speed pressure treatment of fluid by spiral case 4, are flowed out by delivery side of pump section 3.The runner of above-mentioned spiral case 4 is screw-shaped flow paths, cross section of fluid channel is increased gradually by entrance to the outlet of spiral case 4 of spiral case 4, the outlet of spiral case 4 is provided with the expelling tube 6 with the outlet of spiral case 4, expelling tube 6 is for having the cylinder of tapering, and the cross section of expelling tube 6 is increased gradually by entrance to the outlet of expelling tube 6 of expelling tube 6; The angular range of the axis of expelling tube 6 and the outlet port main flow direction of spiral case 4 is 10 ° to 60 °.
In the residual heat removal pump that the present embodiment provides, by being increased by the cross section of fluid channel of spiral case 4, the rate of flow of fluid entered in spiral case 4 can be made to reduce, play the object expanding hydrodynamic pressure, and then, ensure that the uniformity of spiral case 4 fluid flow inside, avoid the situation producing turbulent flow in spiral case 4.In addition, arranging the main flow direction angular range that the axis of expelling tube 6 and spiral case 4 export on this basis is between 10 ° to 60 °, and comprises 10 ° and 60 °, and the fluid that spiral case 4 can be avoided to export causes the disorder of flowing and is separated when entering expelling tube 6, further, ensure that the smooth and easy of flowing.
The pulsation of fluid can reduce by the residual heat removal pump that the present embodiment provides, and eliminate because flow eddies moves the flow losses caused, therefore, pump case is stressed to improve, and the hydraulic efficiency of pump also can significantly improve simultaneously.
In an embodiment of the present utility model, further the area of cross section of fluid channel is designed.Particularly, along on the direction of the main flow direction in spiral case 4, the scope of the area increase multiple of cross section of fluid channel is 1.02 to 1.05.
Need it is to be noted that the increase gradually of area herein refers on fluid flow direction, the area relationship between the first cross section that the thickness obtained by runner differential is minimum and the second adjacent with it cross section.So area increases that multiple refers to is then proportionate relationship between adjacent two cross sections, namely the area ratio in the first cross section that the area in the second cross section that distance entrance is far away is nearer with distance entrance is in the scope of 1.02 to 10.5.
In the present embodiment, the restriction of scope is carried out to the increase multiple of runner section area, ensured that the expansion of cross section of fluid channel is in a less scope, both can reduce the flow velocity of fluid, ensure the rising of pressure, also ensure that simultaneously and can not produce turbulent flow in inside.
Preferably, along on the main flow direction direction in spiral case 4, it is constant that area increases multiple.Area is increased multiple and is set as definite value, the flowing of fluid more effectively can be made more stable, not easily produce turbulent flow.
Preferably, along on the main flow direction in spiral case 4, the increase multiple of area is 1.03.By theory analysis and modeling analysis, obtain area and increase multiple when being 1.03, the mobile performance in spiral case 4 is best, and the pulsation of fluid the most easily drops to floor level, and the stressing conditions of pump case also obtains best improvement and adjustment.
In an embodiment of the present utility model, carry out further limiting to the angle of the axis of expelling tube 6 and the outlet port main flow direction of spiral case 4, this angle has been set as 30 °.All can reach the situation improving outlet manifold in the scope of 10 ° to 60 ° in above-described embodiment, can adjust according to concrete user demand.
On the basis of above-mentioned arbitrary mode of execution, the junction surface of expelling tube 6 with the outlet of spiral case 4 is set as seamlessly transitting curved surface.Seamlessly transitting the turbulent flow that curved surface can reduce outlet port, avoiding the flow losses produced because there is turbulent flow.
On the basis of above-mentioned arbitrary mode of execution, cross section of fluid channel is circular flow channel cross section or oval cross section of fluid channel, and the concrete shape of cross section of fluid channel can adjust according to user demand.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
Except the residual heat removal pump that above-described embodiment provides, the utility model also provides a kind of nuclear power system comprising the open residual heat removal pump of above-described embodiment, residual heat removal pump is as core two stage pump, it is one of visual plant ensureing nuclear power generating equipment safety, the structure of other each several parts of this nuclear power system please refer to prior art, repeats no more herein.
Above a kind of nuclear power generating equipment provided by the utility model and residual heat removal pump thereof are described in detail.Apply specific case herein to set forth principle of the present utility model and mode of execution, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (8)
1. a residual heat removal pump, comprise the pump housing, the spiral case (4) being installed on the stator (2) in the described pump housing and being connected with the outlet of described stator (2), it is characterized in that, the cross section of fluid channel of described spiral case (4) is increased gradually by entrance to the outlet of described spiral case (4) of described spiral case (4), the outlet of described spiral case (4) is communicated with expelling tube (6), described expelling tube (6) is for having the cylinder of tapering, the cross section of described expelling tube (6) is increased gradually by entrance to the outlet of described expelling tube (6) of described expelling tube (6), the angular range of the axis of described expelling tube (6) and the outlet port main flow direction of described spiral case (4) is 10 ° to 60 °.
2. residual heat removal pump according to claim 1, is characterized in that, the main flow direction in described spiral case (4), and the scope of the area increase multiple of described cross section of fluid channel is 1.02 to 1.05.
3. residual heat removal pump according to claim 2, is characterized in that, the main flow direction in described spiral case (4), and it is constant that described area increases multiple.
4. residual heat removal pump according to claim 3, is characterized in that, the main flow direction in described spiral case (4), and it is 1.03 that described area increases multiple.
5. the residual heat removal pump according to Claims 1-4 any one, is characterized in that, the angle of the axis of described expelling tube (6) and the outlet port main flow direction of described spiral case (4) is 30 °.
6. residual heat removal pump according to claim 5, is characterized in that, the junction surface of the outlet of described expelling tube (6) and described spiral case (4) is for seamlessly transitting curved surface.
7. residual heat removal pump according to claim 6, is characterized in that, described cross section of fluid channel is circular flow channel cross section or oval cross section of fluid channel.
8. a nuclear power system, comprises residual heat removal pump, it is characterized in that, described residual heat removal pump is the residual heat removal pump described in claim 1 to 7 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520498127.0U CN204851779U (en) | 2015-07-10 | 2015-07-10 | Nuclear power system and waste heat excavating pump thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520498127.0U CN204851779U (en) | 2015-07-10 | 2015-07-10 | Nuclear power system and waste heat excavating pump thereof |
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| Publication Number | Publication Date |
|---|---|
| CN204851779U true CN204851779U (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520498127.0U Expired - Fee Related CN204851779U (en) | 2015-07-10 | 2015-07-10 | Nuclear power system and waste heat excavating pump thereof |
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| CN (1) | CN204851779U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929984A (en) * | 2015-07-10 | 2015-09-23 | 南阳新威机电有限公司 | Nuclear power system and residual heat removal pump thereof |
-
2015
- 2015-07-10 CN CN201520498127.0U patent/CN204851779U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929984A (en) * | 2015-07-10 | 2015-09-23 | 南阳新威机电有限公司 | Nuclear power system and residual heat removal pump thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210508 Address after: No. 409, group 9, pengying, heizhang village, Zhanglin Township, Zhenping county, Nanyang City, Henan Province Patentee after: Liu Hongliang Address before: 474250 xiwuligang, Zhenping county, Nanyang City, Henan Province Patentee before: NANYANG XINWEI ELECTROMECHANICAL Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220105 Address after: 450000 Room 308, building 2, Xinghua building, Jingkai Second Street, Zhengzhou area (Jingkai), Henan pilot Free Trade Zone, Zhengzhou City, Henan Province Patentee after: Zhengzhou Chenwei Fluid Technology Co.,Ltd. Address before: No. 409, group 9, pengying, heizhang village, Zhanglin Township, Zhenping county, Nanyang City, Henan Province Patentee before: Liu Hongliang |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 |
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| CF01 | Termination of patent right due to non-payment of annual fee |