CN105351207A - Charging pump - Google Patents
Charging pump Download PDFInfo
- Publication number
- CN105351207A CN105351207A CN201510933582.3A CN201510933582A CN105351207A CN 105351207 A CN105351207 A CN 105351207A CN 201510933582 A CN201510933582 A CN 201510933582A CN 105351207 A CN105351207 A CN 105351207A
- Authority
- CN
- China
- Prior art keywords
- pump
- cylindrical shell
- water
- fill
- impeller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/08—Multi-stage pumps the stages being situated concentrically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
- F04D29/044—Arrangements for joining or assembling shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/0465—Ceramic bearing designs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/20—Oxide or non-oxide ceramics
- F05D2300/22—Non-oxide ceramics
- F05D2300/224—Carbon, e.g. graphite
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a charging pump suitable for a nuclear power unit. The charging pump comprises a barrel, and a water inlet chamber and a pump cover on the two sides of the barrel; a primary impeller, a secondary impeller and a balancing drum are arranged on the part, in the barrel, of a pump shaft in a sleeving mode in sequence from a driving end; guide vanes are disposed on the outer sides of the impellers; middle sections are disposed on the outer sides of the guide vanes; guide bearings are disposed on the guide vanes; a mechanical seal, a transverse bearing and a coupler are disposed at a non-driving end of the pump shaft in sequence and on the outer side of the water inlet chamber; the pump is connected with external driving equipment through the coupler; a mechanical seal, a thrust bearing and a fan impeller are disposed at the driving end of the pump shaft in sequence and on the outer side of the pump cover. By means of the charging pump, the defect rate of parts can be decreased; the pump maintaining requirement is lowered; the vibration intensity during operation is decreased; the safety, reliability and stability of equipment on site of a nuclear power station are guaranteed.
Description
Technical field
The present invention relates to nuclear power equipment technology field, be specifically related to a kind of ACP1000 of being applicable to nuclear power generating sets on fill pump.
Background technique
On fill the important component part that pump is upper charging system (RCV) in nuclear power station, filling pump is therefore one of important safety installation of nuclear power station, is also the key equipment of nuclear power station.On to fill pump be pressurized-water reactor nuclear power plant nuclear safety 2,3 grades of pumps.
The pump of the same type of current nuclear power station onsite application, as the part contacted with primary Ioops, needs thoroughly clean, and does not possess Drawing-Core design during maintenance.The guide bearing adopted generally adopts stainless steel basic unit carbide-faced, the high but not resistance to dry grinding of hardness, dryly has damage to a certain degree to bearing when starting thus affects the working life of bearing.Vibration severity when field adjustable runs is higher, even if Repair is up to standard, also causes certain risk to the safe and reliable operation of equipment, creates certain impact to the overall operation performance of nuclear power station.
Summary of the invention
The object of the present invention is to provide in one and fill pump, the ratio of defects of part can be reduced, reduce pump maintenance requirement, reduce vibration severity when running, ensure that equipment is stablized the safe and reliable of nuclear power station scene.
In order to achieve the above object, technological scheme of the present invention is to provide in one fills pump, comprises:
Cylindrical shell;
Be arranged on the intake chamber of cylindrical shell first side;
Be arranged on the pump cover of cylindrical shell second side;
Pump shaft, the intermediate portion of this pump shaft is arranged in cylindrical shell;
The intermediate portion of described pump shaft is arranged with first stage impeller, multistage secondary impeller, balancing drum from the first side successively to the second side;
After the end of described pump shaft first side passes intake chamber, be disposed with the first mechanical seal, radial bearing and coupling, be connected with outside driving arrangement by coupling;
After the end of described pump shaft second side passes pump cover, be disposed with the second mechanical seal, thrust-bearing and blast fan;
Wherein, the drive end of pump is filled in described first side on being; The anti-drive end of pump is filled in described second side on being.
Preferably, described intake chamber offers the water intake filling pump, water inlet is provided with water-in flange;
The water outlet filling pump on described is arranged on cylindrical shell, and water outlet is configured with water-output flange;
Described water-in flange and water-output flange lay respectively at the both sides of cylindrical shell.
Preferably, described secondary impeller has 11, and itself and first stage impeller are affixed, and common formation is filled 12 grades of impellers of pump; Described balancing drum is arranged on the second side of afterbody secondary impeller, is positioned the annular groove place of pump shaft.
Preferably, stator is arranged with respectively outside described first stage impeller and secondary impeller at different levels;
Each stator is respectively arranged with guide bearing;
Stage casing is respectively arranged with outside each stator; Casing ring is provided with between described stage casing and corresponding first stage impeller or secondary impeller.
Preferably, described guide bearing is the bushing bearing of carbon graphite.
Preferably, described first mechanical seal, the second mechanical seal are integrated mechanical sealing;
The cyclone separator that the sparge water of the first mechanical seal is arranged on cylindrical shell filters;
The sparge water of the second mechanical seal is from balancing drum throttling.
Preferably, exhaust flange and tapping flange are set respectively in the upper and lower of cylindrical shell.
Preferably, be connected with described cylindrical shell by arranging pump supporting foot, on fill pump and be fixed support.
Preferably, described cylindrical shell, intake chamber and pump cover are made respectively by forging.
Preferably, described coupling is cog-wheel coupling.
The invention provides a kind of be applicable to nuclear power generating sets on fill pump, it compared with prior art has the following advantages: structural design is compact, and hydraulic part design fluidised form is steady, and water inlet and outlet housing adopts the method for forging to ensure the quality of part; Adopt carbon graphite guide bearing, wear-resisting and by fine particle, medium selflubricating, reduces maintenance requirement greatly, effectively ensure the safety of this used in nuclear power station pump operation, reliably, stable.
Accompanying drawing explanation
Fig. 1 be of the present invention on fill the overall structure generalized section of pump;
Fig. 2 be described in Fig. 1 on fill pump structure schematic top plan view.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
As shown in Figure 1 and Figure 2, the invention provides in one and fill pump, this pump is horizontal cylinder bag sectional multi-stage centrifugal pump, and from motor drive terminal, pump rotation direction is counterclockwise, this fills pump and comprises: cylindrical shell 1; Be arranged on the intake chamber 2 on the right side of cylindrical shell 1; Be arranged on the pump cover 10 on the left of cylindrical shell 1; Pump shaft 3, the intermediate portion of this pump shaft 3 is arranged in cylindrical shell 1, and on the intermediate portion of described pump shaft 3, from the right side, a left side is arranged with first stage impeller 71 successively, secondary impeller 72 and balancing drum 19; Be provided with radial bearing 5 after pump shaft 3 right-hand member passes intake chamber 2, coupling 4 is set on the right side of radial bearing 5, be connected with driving arrangement (as motor) by coupling 4; After pump shaft 3 left end passes pump cover 10, thrust-bearing 11 is set, blast fan 12 is set on the left of thrust-bearing 11.
Wherein, the side (left side in this example) at thrust-bearing 11 place is the anti-drive end above filling pump, and the side (right side in this example) at radial bearing 5 place is the drive end above filling pump.
Preferably, described cylindrical shell 1, intake chamber 2 and pump cover 10 adopt forging mode to manufacture respectively.
Described intake chamber 2 offers the water intake filling pump, and water inlet is provided with water-in flange 21; On fill pump water outlet be arranged on the outside of cylindrical shell 1, water outlet is configured with water-output flange 20.Described water-in flange 21 and water-output flange 20 lay respectively at the both sides of cylindrical shell 1.
Preferably, described secondary impeller 72 has 11, and itself and first stage impeller 71 are affixed, and common formation is filled 12 grades of impellers of pump, and the suction bore of first stage impeller 71 is comparatively large, and the number of blade is 5, improves cavitation of pump, to reach onsite application requirement.
Described balancing drum 19 is arranged on the left side of afterbody secondary impeller 72, is positioned the annular groove place of pump shaft 3, plays the effect of balancing axial thrust.
Be arranged with stator 81 respectively outside first stage impeller 71 and secondary impeller at different levels 72, play and transfer the liquid of impeller radial direction to axis, kinetic energy is converted to the effect of pressure energy; Wherein, stator 81 sheathed outside afterbody secondary impeller 72 is called final stage stator 82, also for by within impeller liquid collection out to cylindrical shell 1.
Described stator 81 is provided with guide bearing 18, first stage impeller 71 and secondary impeller 72 can be supported in pump operation process, play bearing effect.Described guide bearing 18 is specifically arranged between stator 81 and corresponding impeller.Preferred described guide bearing 18 is the bushing bearing of carbon graphite.
Have stage casing 9 in described stator 81 arranged outside, the liquid that first stage impeller 71 and secondary impeller 72 flow out is converted to axis by radial direction by it together with stator 81.Between described stage casing 9 and corresponding impeller, be provided with casing ring 17, in order to prevent inter-stage from leaking, improve the efficiency of pump.In addition, corresponding casing ring 17 also can be set between described first stage impeller 71 and intake chamber (suction chamber).Preferred described casing ring 17 is cellular structure.
After described pump shaft 3 right-hand member passes cylindrical shell 1, have mechanical seal 61 in the arranged outside of intake chamber 2, this mechanical seal 61 is positioned at the left side of radial bearing 5; After described pump shaft 3 left end passes cylindrical shell 1, on the left of pump cover 10, be provided with mechanical seal 62.Seal action is played in described mechanical seal 61,62, and liquid can be prevented from cylindrical shell 1 internal leakage.
Preferred described mechanical seal 61,62 is integrated mechanical sealing, single end face balance type, and required sparge water carrys out self-pumping: the cyclone separator 16 that the sparge water of the mechanical seal 61 on right side is arranged on cylindrical shell 1 filters; The sparge water of the mechanical seal 62 in left side is from balancing drum 19 throttling.
Exhaust flange 15 and tapping flange 14 are set respectively in the upper and lower of cylindrical shell 1.Being connected with described cylindrical shell 1 by arranging pump supporting foot 13, being used for fixing in support and filling pump.
Fill the pump core packet portion of pump on of the present invention, comprise intake chamber 2, thrust-bearing 11, stator 81(at different levels is containing final stage stator 82), stage casing 9, impeller at different levels (containing first stage impeller 71 and secondary impeller 72), balancing drum 19, pump shaft 3, pump cover 10, parts such as radial bearing 5 grade, can overall extraction out from cylindrical shell 1 and not influential system pipeline, greatly reduce the repair time, also make regular maintenance personnel radioactive exposure to be reduced to floor level.
In the present invention, the design of pump shaft 3 considers very large allowance, moment of torsion required under guaranteeing to transmit different operating mode, and does not produce excessive stress and vibration.Coupling 4 adopts a point half-coupling, is easier to assembling and dismounting pump, only need by the Bolt dismantling on point half-coupling during dismounting, i.e. detachable jacket casing.Preferably, the coupling 4 between pump and motor adopts cog-wheel coupling, and with middle shaft coupling, and be furnished with specially can the radial special tool removing coupling 4.Thus just detachable bearing and the mechanical seal when not dismantling motor, motor half-coupling and axle are interference fit.
Guide bearing 18 in the present invention is carbon graphite material.The advantage of this guide bearing is: wear-resisting, by fine particle, medium selflubricating, very big reduction maintenance requirement, adopt other guide bearings (such as: match dragon, rubber etc.) can not do startup, need external sparge water before start, system pipeline and the destabilizing factor of pump itself certainly will be increased.And due to carbon graphite bearing can effective support rotor in running, reduce the vibration of pump.
Thrust-bearing 11 is arranged on the left side of left end mechanical seal 62 by the present invention, and participate in axial thrust and radial gravity in order to bear, lubricating system is bath lubrication.This bearing is tapered roller bearing, and oil temperature can be monitored by installing a temperature thermal resistor in bearing upper end.
In sum, the present invention can reduce the ratio of defects of part, reduces pump maintenance requirement, reduces vibration severity when running, and ensures that equipment is stablized the safe and reliable of nuclear power station scene.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. fill a pump on, it is characterized in that, comprise:
Cylindrical shell (1);
Be arranged on the intake chamber (2) of cylindrical shell (1) first side;
Be arranged on the pump cover (10) of cylindrical shell (1) second side;
Pump shaft (3), the intermediate portion of this pump shaft (3) is arranged in cylindrical shell (1);
The intermediate portion of described pump shaft (3) is arranged with first stage impeller (71), multistage secondary impeller (72), balancing drum (19) successively from the first side to the second side;
After the end of described pump shaft (3) first side passes intake chamber (2), be disposed with the first mechanical seal (61), radial bearing (5) and coupling (4), be connected with outside driving arrangement by coupling (4);
After the end of described pump shaft (3) second side passes pump cover (10), be disposed with the second mechanical seal (62), thrust-bearing (11) and blast fan (12);
Wherein, the drive end of pump is filled in described first side on being; The anti-drive end of pump is filled in described second side on being.
2. fill pump on as claimed in claim 1, it is characterized in that,
(2) offer the water intake filling pump to described intake chamber, and water inlet is provided with water-in flange (21);
The water outlet filling pump on described is arranged on cylindrical shell (1), and water outlet is configured with water-output flange (20);
Described water-in flange (21) and water-output flange (20) lay respectively at the both sides of cylindrical shell (1).
3. fill pump on as claimed in claim 1, it is characterized in that,
Described secondary impeller (72) has 11, and itself and first stage impeller (71) are affixed, and common formation is filled 12 grades of impellers of pump;
Described balancing drum (19) is arranged on the second side of afterbody secondary impeller (72), is positioned the annular groove place of pump shaft (3).
4. fill pump on as claimed in claim 1, it is characterized in that,
Described first stage impeller (71) and secondary impeller at different levels (72) outside are arranged with stator (81) respectively;
Each stator (81) is respectively arranged with guide bearing (18);
Each stator (81) outside is respectively arranged with stage casing (9); Casing ring (17) is provided with between described stage casing (9) and corresponding first stage impeller (71) or secondary impeller (72).
5. fill pump on as claimed in claim 4, it is characterized in that,
Described guide bearing (18) is the bushing bearing of carbon graphite.
6. fill pump on as claimed in claim 1, it is characterized in that,
Described first mechanical seal (61), the second mechanical seal (62) are integrated mechanical sealing;
The sparge water of the first mechanical seal (61) filters through the upper cyclone separator (16) arranged of cylindrical shell (1);
The sparge water of the second mechanical seal (62) is from balancing drum (19) throttling.
7. fill pump on as claimed in claim 1, it is characterized in that,
Exhaust flange (15) and tapping flange (14) are set respectively in the upper and lower of cylindrical shell (1).
8. fill pump on as claimed in claim 1, it is characterized in that,
Be connected with described cylindrical shell (1) by arranging pump supporting foot (13), on fill pump and be fixed support.
9. fill pump on as claimed in claim 1, it is characterized in that,
Described cylindrical shell (1), intake chamber (2) and pump cover (10) are made respectively by forging.
10. fill pump on as claimed in claim 1, it is characterized in that,
Described coupling (4) is cog-wheel coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510933582.3A CN105351207A (en) | 2015-12-15 | 2015-12-15 | Charging pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510933582.3A CN105351207A (en) | 2015-12-15 | 2015-12-15 | Charging pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105351207A true CN105351207A (en) | 2016-02-24 |
Family
ID=55327249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510933582.3A Pending CN105351207A (en) | 2015-12-15 | 2015-12-15 | Charging pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105351207A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018050404A1 (en) * | 2016-09-15 | 2018-03-22 | Siemens Aktiengesellschaft | Single-shaft turbo compressor |
| CN108267268A (en) * | 2016-12-30 | 2018-07-10 | 核动力运行研究所 | A kind of static pressure test apparatus for RCV pump mechanical sealing components |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018050404A1 (en) * | 2016-09-15 | 2018-03-22 | Siemens Aktiengesellschaft | Single-shaft turbo compressor |
| CN109715954A (en) * | 2016-09-15 | 2019-05-03 | 西门子股份公司 | Single axle turbo-compressor |
| CN109715954B (en) * | 2016-09-15 | 2021-04-02 | 西门子股份公司 | Single-shaft type turbo compressor |
| US11286948B2 (en) | 2016-09-15 | 2022-03-29 | Siemens Energy Global GmbH & Co. KG | Single-shaft turbo compressor |
| CN108267268A (en) * | 2016-12-30 | 2018-07-10 | 核动力运行研究所 | A kind of static pressure test apparatus for RCV pump mechanical sealing components |
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Application publication date: 20160224 |