CN103398012B - Nuclear power station start and stop feed water pump - Google Patents
Nuclear power station start and stop feed water pump Download PDFInfo
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- CN103398012B CN103398012B CN201310361630.7A CN201310361630A CN103398012B CN 103398012 B CN103398012 B CN 103398012B CN 201310361630 A CN201310361630 A CN 201310361630A CN 103398012 B CN103398012 B CN 103398012B
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Abstract
The present invention relates to a kind of nuclear power station start and stop feed water pump, comprise cylindrical shell and core bag, core bag integral assembling is in inner barrel; Cylindrical shell is imported and exported pipeline with outside and is connected, and pump intake and pump discharge are arranged vertically upward; Described core pack arrangement is, one end of pump shaft is provided with mechanical seal I and drive end axle bearing assembly, and the other end of pump shaft is provided with mechanical seal II and free end shaft bearing assembly; Pump shaft is provided with suction casing, stage casing, balanced controls and pressing plate successively, and suction casing is connected with the bearing support of drive end axle bearing assembly, and pressing plate is connected with the bearing support of free end shaft bearing assembly.The significantly shortening of engineering time of the present invention, will improve supportability and the usability of equipment greatly, and add resistance to erosion ability, extend working life, ensure that pump has higher efficiency and stable performance characteristic.The present invention adopts double-shell structure, and namely pump has two-layer pressure-bearing boundary, and pressure-bearing reliability adds one times; Guarantee the safety of pump bearing structure.
Description
Technical field
The present invention relates to a kind of feed water pump, particularly relate to a kind of nuclear power station start and stop feed water pump.
Background technique
Start and stop feed water pump is one of capital equipment of pressurized-water reactor nuclear power plant start and stop water supply system, and its function normally starts at nuclear power station to provide auxiliary feedwater with during shutdown to steamer second side.Can start and stop feed water pump the work of normal safe start decision nuclear power generating sets and keep in repair with shutdown according to plan.
In prior art, pump when mounted, mostly first impeller is arranged on pump shaft, stuffing box gland is installed again respectively in impeller two ends, pump shaft is penetrated in the pump housing, be inserted in pump cover in one end of pump shaft, pump cover be fixed on the pump housing, then the structure such as installation sealing structure, bearing, bearing support successively on pump shaft.This traditional structure, the assembling only completing core bag just at least needs 48 hours, greatly reduces working efficiency; And when overhauling, then need oppositely to dismantle from pump housing two ends respectively, not only extend maintenance time, and reduce the usability of equipment.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, provide a kind of nuclear power station start and stop feed water pump, solve the problem that in prior art, disassembly and assembly time is long, and improve the usability of equipment.
Technological scheme of the present invention is as follows:
Comprise cylindrical shell and core bag, core bag integral assembling is in inner barrel; Cylindrical shell is imported and exported pipeline with outside and is connected, and pump intake and pump discharge are arranged vertically upward; Described core pack arrangement is, one end of pump shaft is provided with mechanical seal I and drive end axle bearing assembly, and the other end of pump shaft is provided with mechanical seal II and free end shaft bearing assembly; Pump shaft is provided with suction casing, stage casing, balanced controls and pressing plate successively, and suction casing is connected with the bearing support of drive end axle bearing assembly, and pressing plate is connected with the bearing support of free end shaft bearing assembly.
Described suction casing is, first stage impeller connects first-level guide blade, and first-level guide blade connects first-level guide blade cover, and first-level guide blade and first-level guide blade are provided with seal ring between overlapping.
Described stage casing is, intermediate impeller connects intermediate stator, and intermediate stator connects intermediate guide blade sleeve, is provided with seal ring between intermediate stator and intermediate guide blade sleeve.
Described stage casing comprises one-level stage casing, secondary stage casing, three grades of stage casings, level Four stage casing and final stage stage casings.
Between described first-level guide blade and intermediate stator and intermediate stator each other all adopt seam coordinate; Between described first-level guide blade and intermediate stator and intermediate stator be provided with anti-rotation pin each other.
Described balanced controls adopt two balancing drum structure, and balanced controls are made up of Balance disc, balance set and balance casing pressure plate, and the outer surface suit balance set of Balance disc, balance set connects balance set pressing plate.
The axial clearance of described balanced controls is 0.3mm, and radial clearance is 0.22-0.25mm.
The driving bearing of described drive end axle bearing assembly and the free end bearing of free end shaft bearing assembly all adopt sliding bearing; One end that free end bearing is closing on bearing gland is connected with thrust bearing; Sliding bearing and thrust bearing all adopt splash lubrication pattern, are provided with closed cooling water tank below sliding bearing and thrust bearing.
Described mechanical seal is integrated mechanical sealing.
Described cylindrical shell overcurrent position built-up welding has this body stainless steel lining of Austria of resistance to erosion.
Advantageous effect of the present invention is as follows:
1, present invention achieves overall drawable type pump core, cylindrical shell can be sent into immediately when overhauling, complete cylindrical shell bolt fastening after just complete the assembling of whole pump.Applying unit is when preparing running repairs or emergency maintenance, only need the pump core assembled is sent into cylindrical shell and just can complete maintenance after clamping bolt, pump is put into operation again, whole process can complete in 4 hours, the significantly shortening of engineering time, will improve supportability and the usability of equipment greatly.
2, overcurrent position built-up welding this body stainless steel lining of Austria of resistance to erosion of cylindrical shell, add resistance to erosion ability, extend working life, the design service life of this cylindrical shell was more than 40 years, the working life of nuclear power station is also 40 years, so this cylindrical shell can be used safely in the whole nuclear power phase of being on active service.
3, the invention belongs to small flow and high lift pump, ensure that pump has higher efficiency and stable performance characteristic.The present invention adopts double-shell structure, and namely pump has two-layer pressure-bearing boundary, and pressure-bearing reliability adds one times; Guarantee the safety of pump bearing structure.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is performance curve schematic diagram of the present invention.
In figure, 1, suction side, 2-1, one-level stage casing, 2-2, secondary stage casing, 2-3, three grades of stage casings, 2-4, final stage stage casing, 3, spue anti-flange, 4, suck anti-flange, 5-1, one-level stator, 5-3, three grades of stators, 5-4, final stage stator, 6, first stage impeller, 7, balance set, 8, balance set pressing plate, 9, gland, 10, equilibrirm water pipeline, 11, clamp, 12, guide blade sleeve, 13, cooling chamber body, 14, pressing plate, 15, cylindrical shell, 16, end cap, 17, stud, 18, nut, 19, packing ring, 20, pump shaft, 21, drive end axle bearing assembly, 22, mechanical seal I, 23, free end shaft bearing assembly, 24, thrust bearing, 25, connecting bolt.
Embodiment
Referring to accompanying drawing, in conjunction with specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, adopt Double-casing horizontal multi-stage centrifugal pump, impeller progression is 6 grades; Comprise cylindrical shell 15 and core bag, core bag integral assembling is inner at cylindrical shell 15, and cylindrical shell 15, end cap 16 are fixed by stud 17, nut 18 and packing ring 19; Clamp 11 and cylindrical shell 15 are fixed by pin; Cylindrical shell 15 is provided with equilibrirm water pipeline 10, sucks anti-flange 4 and the anti-flange 3 that spues, and cylindrical shell 15 is imported and exported pipeline with outside and connected, and pump intake and pump discharge are arranged vertically upward; The position built-up welding of cylindrical shell overcurrent has this body stainless steel lining of Austria of resistance to erosion; Described core pack arrangement is, one end of pump shaft 20 is provided with mechanical seal I22 and drive end axle bearing assembly 21, and the other end of pump shaft 20 is provided with mechanical seal II and free end shaft bearing assembly 23; Pump shaft 20 is provided with successively suction casing 1, stage casing, balanced controls and pressing plate 14, suction casing 1 is connected with the bearing support of drive end axle bearing assembly, and pressing plate 14 is connected with the bearing support of free end shaft bearing assembly.
Described suction casing is, first stage impeller 6 connects first-level guide blade, and first-level guide blade connects first-level guide blade cover, and first-level guide blade and first-level guide blade are provided with seal ring between overlapping.Described stage casing is, intermediate impeller connects intermediate stator, and intermediate stator connects intermediate guide blade sleeve 12, is provided with seal ring between intermediate stator and intermediate guide blade sleeve.Described stage casing comprises one-level stage casing 2-1, secondary stage casing 2-2, three grades of stage casing 2-3, level Four stage casing and final stage stage casing 2-4.Between described first-level guide blade and intermediate stator and intermediate stator each other all adopt seam coordinate; Between described first-level guide blade and intermediate stator and intermediate stator be provided with anti-rotation pin each other.Adopt metal face seal between described stage casing is at different levels, described stage casing is at different levels to be connected by connecting bolt 25 each other.
Described balanced controls adopt two balancing drum structure, and balanced controls are made up of Balance disc, balance set 7 and balance casing pressure plate 8, and the outer surface suit balance set 7 of Balance disc, balance set connects balance set pressing plate, and balance set and balance set pressing plate are connected with gland 9.Easily grind when avoiding the structure start and stop of singly balanced dish, working life is short, turn avoid the shortcoming that singly balanced drum can not adjust equilibrant.Can balance the end thrust of 95%, all the other axial forces are born by thrust bearing.Consider reliability of operation and working life, the axial gap designs of balanced controls is minimum is 0.3mm, and radial clearance is 0.22-0.25mm.。
The driving bearing of described drive end axle bearing assembly 21 and the free end bearing of free end shaft bearing assembly all adopt sliding bearing; Free end bearing is connected with thrust bearing 24 in the one end closing on bearing gland; Sliding bearing and thrust bearing all adopt splash lubrication pattern, and be provided with closed cooling water tank below sliding bearing and thrust bearing, cooling water can take away the heat that pivot friction is distributed.Cooling chamber body 13 is provided with in described drive end axle bearing assembly and the inner chamber of free end shaft bearing assembly.
Described mechanical seal is integrated mechanical sealing.
Assemble sequence of the present invention is, first installs to pump shaft after first stage impeller heats by free end, with location, the pump shaft place of topping bar, pump shaft and first stage impeller is inserted suction casing.Because core bag intermediate portion is vertical installation, need suction casing connecting shaft be fixed in assembly tooling, first-level guide blade and stage casing are installed, except seam coordinates, also have anti-rotation pin to fix between first-level guide blade with stage casing, by that analogy, other impeller at different levels, stators are installed.By metal face seal between stage casing is at different levels, connect by connecting bolt each other, connecting bolt should ensure suitable tight power.
After installing every one-level, the work string quantity after should checking axial string quantity and loading Balance disc, meet drawing specified value.
Install after balanced controls, mounting portion crane lain in assembly tooling, both sides mechanical seal and bearing support is installed, respectively bearings at both ends body is connected with suction casing and pressing plate, part in installation bearings at both ends, whole like this core pack join complete; The core bag assembled can overallly be sent in cylindrical shell.
In order to implement on-line monitoring to pump work state, bearing, the mechanical seal of pump all install temperature point, pass through Signal transmissions, operations staff can monitor the running temperature of bearing and sealing, bearing and sealing are that pump the most easily crosses the parts of cause thermal damage, just can to prevent accident to greatest extent generation to the monitoring at this two place.
Performance parameter of the present invention, flow 100m3/h; Lift 770m; Rotating speed 2980r/min; Complete motor power 400KW, 10KV; Fed sheet of a media water.Medium temperature 132 DEG C; Working method: run continuously.
Guarantee point performance parameter test result of the present invention is as following table.
Claims (6)
1. nuclear power station start and stop feed water pump, it is characterized in that comprising cylindrical shell and core bag, core bag integral assembling is in inner barrel; Cylindrical shell is imported and exported pipeline with outside and is connected, and pump intake and pump discharge are arranged vertically upward; Described core pack arrangement is, one end of pump shaft is provided with mechanical seal I and drive end axle bearing assembly, and the other end of pump shaft is provided with mechanical seal II and free end shaft bearing assembly; Pump shaft is provided with suction casing, stage casing, balanced controls and pressing plate successively, and suction casing is connected with the bearing support of drive end axle bearing assembly, and pressing plate is connected with the bearing support of free end shaft bearing assembly; Described suction casing is, first stage impeller connects first-level guide blade, and first-level guide blade connects first-level guide blade cover, and first-level guide blade and first-level guide blade are provided with seal ring between overlapping; Described stage casing is, intermediate impeller connects intermediate stator, and intermediate stator connects intermediate guide blade sleeve, is provided with seal ring between intermediate stator and intermediate guide blade sleeve; Described balanced controls adopt two balancing drum structure, and balanced controls are made up of Balance disc, balance set and balance casing pressure plate, the outer surface suit balance set of Balance disc, and balance set connects balance set pressing plate; The axial clearance of described balanced controls is 0.3mm, and radial clearance is 0.22-0.25mm.
2. nuclear power station start and stop feed water pump according to claim 1, is characterized in that described stage casing comprises one-level stage casing, secondary stage casing, three grades of stage casings, level Four stage casing and final stage stage casings.
3. nuclear power station start and stop feed water pump according to claim 1, is characterized in that between described first-level guide blade and intermediate stator and intermediate stator all adopts seam to coordinate each other; Between described first-level guide blade and intermediate stator and intermediate stator be provided with anti-rotation pin each other.
4. nuclear power station start and stop feed water pump according to claim 1, is characterized in that the driving bearing of described drive end axle bearing assembly and the free end bearing of free end shaft bearing assembly all adopt sliding bearing; One end that free end bearing is closing on bearing gland is connected with thrust bearing; Sliding bearing and thrust bearing all adopt splash lubrication pattern, are provided with closed cooling water tank below sliding bearing and thrust bearing.
5. nuclear power station start and stop feed water pump according to claim 1, is characterized in that described mechanical seal is integrated mechanical sealing.
6. nuclear power station start and stop feed water pump according to claim 1, is characterized in that described cylindrical shell overcurrent position built-up welding has this body stainless steel lining of Austria of resistance to erosion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310361630.7A CN103398012B (en) | 2013-08-15 | 2013-08-15 | Nuclear power station start and stop feed water pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310361630.7A CN103398012B (en) | 2013-08-15 | 2013-08-15 | Nuclear power station start and stop feed water pump |
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| Publication Number | Publication Date |
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| CN103398012A CN103398012A (en) | 2013-11-20 |
| CN103398012B true CN103398012B (en) | 2015-12-23 |
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| CN201310361630.7A Active CN103398012B (en) | 2013-08-15 | 2013-08-15 | Nuclear power station start and stop feed water pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018050404A1 (en) * | 2016-09-15 | 2018-03-22 | Siemens Aktiengesellschaft | Single-shaft turbo compressor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3121450B1 (en) * | 2015-07-23 | 2020-09-02 | Sulzer Management AG | Pump for conveying a fluid with varying viscosity |
| CN105351207A (en) * | 2015-12-15 | 2016-02-24 | 上海电气凯士比核电泵阀有限公司 | Charging pump |
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| EP0766007A1 (en) * | 1995-09-26 | 1997-04-02 | Ebara Corporation | High-pressure multistage pump |
| JPH11351176A (en) * | 1998-06-15 | 1999-12-21 | Hitachi Ltd | Barrel casing type turbine pump |
| CN1277328A (en) * | 2000-07-28 | 2000-12-20 | 株式会社日立制作所 | Barrel-type shell turbopump |
| CN2434451Y (en) * | 2000-07-18 | 2001-06-13 | 上海凯泉泵业（集团）有限公司 | Ease-to-repair vertical multi-stage centrifugal pump |
| CN101818734A (en) * | 2010-04-19 | 2010-09-01 | 江苏国泉泵业制造有限公司 | Charging pump with segmental internal shell for use in nuclear power plant |
| CN201615060U (en) * | 2010-02-11 | 2010-10-27 | 大连深蓝泵业有限公司 | Double-casing radially split horizontal multi-stage pump |
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2013
- 2013-08-15 CN CN201310361630.7A patent/CN103398012B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0766007A1 (en) * | 1995-09-26 | 1997-04-02 | Ebara Corporation | High-pressure multistage pump |
| JPH11351176A (en) * | 1998-06-15 | 1999-12-21 | Hitachi Ltd | Barrel casing type turbine pump |
| CN2434451Y (en) * | 2000-07-18 | 2001-06-13 | 上海凯泉泵业（集团）有限公司 | Ease-to-repair vertical multi-stage centrifugal pump |
| CN1277328A (en) * | 2000-07-28 | 2000-12-20 | 株式会社日立制作所 | Barrel-type shell turbopump |
| CN201615060U (en) * | 2010-02-11 | 2010-10-27 | 大连深蓝泵业有限公司 | Double-casing radially split horizontal multi-stage pump |
| CN101818734A (en) * | 2010-04-19 | 2010-09-01 | 江苏国泉泵业制造有限公司 | Charging pump with segmental internal shell for use in nuclear power plant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018050404A1 (en) * | 2016-09-15 | 2018-03-22 | Siemens Aktiengesellschaft | Single-shaft turbo compressor |
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| CN103398012A (en) | 2013-11-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 110027 3-1, No. 7, No. seven, Shenyang economic and Technological Development Zone, Liaoning, China Patentee after: SHENYANG SANKE NUCLEAR EQUIPMENT MANUFACTURE CO.,LTD. Address before: 110027 3-1, No. 7, No. seven, Shenyang economic and Technological Development Zone, Liaoning, China Patentee before: SHENYANG SANKE HYDRAULIC MACHINERY MANUFACTORY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Startup and shutdown of feedwater pump in nuclear power plant Effective date of registration: 20211223 Granted publication date: 20151223 Pledgee: Shenyang Science and technology Financing Guarantee Co.,Ltd. Pledgor: SHENYANG SANKE NUCLEAR EQUIPMENT MANUFACTURE CO.,LTD. Registration number: Y2021210000102 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230510 Granted publication date: 20151223 Pledgee: Shenyang Science and technology Financing Guarantee Co.,Ltd. Pledgor: SHENYANG SANKE NUCLEAR EQUIPMENT MANUFACTURE CO.,LTD. Registration number: Y2021210000102 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |