CN201818508U - Seawater circulating pump used for nuclear power station - Google Patents
Seawater circulating pump used for nuclear power station Download PDFInfo
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- CN201818508U CN201818508U CN 201020551070 CN201020551070U CN201818508U CN 201818508 U CN201818508 U CN 201818508U CN 201020551070 CN201020551070 CN 201020551070 CN 201020551070 U CN201020551070 U CN 201020551070U CN 201818508 U CN201818508 U CN 201818508U
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Abstract
The utility model discloses a seawater circulating pump used for a nuclear power station, which comprises a volute casing, a pump pit, an upper embedded part, a lower embedded part, a water distribution angle, am impeller, a pump shaft, a pump cover, a bearing support, a bearing, a mechanical sealing device, a gear box and a motor, wherein the volute casing and the pump pit are formed by integral pouring of concrete, the pump pit is formed by layered pouring, the top surface of the pump pit is a motor layer, the gear box layer is arranged below the motor layer, the gear box layer and the bottom of a reduction box chamber are positioned on the same horizontal surface, an overhaul inlet/outlet communicated with the gear box layer is arranged on the side wall of the pump pit, the water distributing angle, the upper embedded part and the lower embedded part are connected into a whole and then poured in the pump pit, the impeller is connected at the lower end of the pump shaft by an end flange, an upper seal ring and a lower seal ring are respectively arranged at the upper end and the lower end of the impeller, the pump cover is fixed on the upper embedded part, the bearing support is fixed on the upper end surface of the pump cover, and the upper end of the bearing support is connected with a gear box support. The gear box is arranged on the gear box support and connected with the motor by a tooth-shaped coupling.
Description
Technical field
The utility model relates to a kind of pump, is specifically related to a kind of seawater circulating water pump that is used for nuclear power station.
Background technique
Nuclear power station utilizes recycle pump to extract seawater and imports vapour condenser, and the steam cooling that steam turbine is discharged is condensed into water, and the heat of condensing is entered in the seawater.Every the unit in general kernel power station is equipped with two circulating water pump usually and works simultaneously.When existing recycle pump changes in each side conditions such as condition of water quality, the water yield, water flow velocity, hydraulic pressure, equipment load, chamber sections, do not have good wear resistance, durability, and self strength deficiency.
In view of the foregoing, the applicant has developed a kind of " concrete spiral casing seawater circulation pump that is used for nuclear power station ", and applied for patent (application number is 200710044520.2), though when this circulating water pump changes in each side conditions such as condition of water quality, the water yield, water flow velocity, hydraulic pressure, equipment load, chamber sections, have wear resistance preferably, durability and enough self intensity.But also there is following defective in the circulating water pump of this structure:
1. the concrete pump hole has only an aspect not establish the maintenance layer, therefore is not easy to overhaul in circulating water pump under the maintainer;
2. the cutwater at the cut water place of concrete spiral casing is not connected with upper and lower embedded part, but buries underground separately, and this makes troubles for on-the-spot the installation;
3. bearing bracket is to be connected with the base of the gear-box that is positioned at bearing top, makes space for maintenance narrow and small, is not easy to the maintenance of circulating water pump;
4. the Placement of pump shaft and impeller is by key and keyway interference fit, is unfavorable for dismounting;
5. upper and lower embedded part and pump cover all adopt the high nickel cast iron manufacturing, and the defective of high nickel cast iron is repaired for being difficult for casting and being not easy to.
Summary of the invention
The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of seawater circulating water pump that is used for nuclear power station to be provided, its efficient height, and cavitation performance is good, stable and reliable operation.
The technological scheme that realizes above-mentioned purpose is: a kind of seawater circulating water pump that is used for nuclear power station, it is a vertical mixed flow pump of one step single sucking, described circulating water pump comprises spiral case, the pump hole, on, following embedded part, cutwater, impeller, pump shaft, pump cover, bearing bracket, bearing, mechanical seal device, gear-box and motor, described spiral case and pump hole form by the reinforced concrete of sea water resistance is integrated poured, described pump hole is positioned on the described spiral case and is provided with bearing chamber and the speed reducer chamber that is communicated with described spiral case, described upward embedded part is positioned at the top of described spiral case, described embedded part down is positioned at the top of described Pump Suction Nozzle, described cutwater is positioned at, between the following embedded part, the cut water place of spiral case, described gear-box is arranged in described speed reducer chamber, described motor is fixed on the end face in described pump hole, and described gear-box is connected with the output shaft lower end of described motor and the upper end of described pump shaft respectively.Wherein:
Described pump hole is the cast of branch stage construction, the end face in pump hole is the motor aspect, the below of this motor aspect is the gear-box aspect, the bottom of this gear-box aspect and described speed reducer chamber is on the same horizontal plane, offers a maintenance gateway that is communicated to described gear-box aspect on the sidewall of the bearing chamber in described pump hole;
The upper/lower terminal of described cutwater is connected with described upper and lower embedded part respectively, and described cutwater is cast in the described pump hole with described upper and lower embedded part;
Described impeller is arranged in described spiral case and is connected the lower end of described pump shaft by the end face flange; This impeller is provided with that install respectively at the two ends up and down of equalizing orifice and impeller, lower sealing ring;
Described pump cover is enclosed within on the described pump shaft and is fixed on described going up on the embedded part;
Described bearing bracket is fixed on the upper-end surface of described pump cover, and the upper end of this bearing bracket connects a gear box support;
Described bearing comprises the radial bearing that is installed in respectively on the described bearing bracket and is installed in the combination bearing of described gear-box bottom.
The above-mentioned seawater circulating water pump that is used for nuclear power station, wherein, described upper and lower embedded part, cutwater, impeller and pump cover are by the two phase stainless steel cast inblock.
The above-mentioned seawater circulating water pump that is used for nuclear power station, wherein, described mechanical seal device is positioned at the top of described pump cover and is enclosed within on the described pump shaft, also is provided with axle sleeve between this mechanical seal device and described pump cover and the described pump shaft, and the lower end of this axle sleeve is connected with described impeller by screw.
The above-mentioned seawater circulating water pump that is used for nuclear power station, wherein, described mechanical seal device comprises main shaft seal and air sac sealing, described main shaft seal is made of the flap seal element; Described air sac sealing comprises two aerated capsules, and these two aerated capsules cooperate with described axle sleeve and along the axially-aligned of pump shaft.
The above-mentioned seawater circulating water pump that is used for nuclear power station wherein, is perfused with fresh water in the Seal cage that constitutes between described mechanical seal device and the described axle sleeve.
The above-mentioned seawater circulating water pump that is used for nuclear power station, wherein, be equipped with on the described down embedded part with described impeller on the spiral case seal ring of lower sealing ring coupling; The outer rim of described pump cover is equipped with the casing wear ring with the upper sealing ring of described impeller coupling.
The above-mentioned seawater circulating water pump that is used for nuclear power station, wherein, described combination bearing is a chain-oiled bearing, and this combination bearing is made of jointly last guide bearing and thrust-bearing, and described radial bearing is a water cooling immersion oil self oiling bearing.
The above-mentioned seawater circulating water pump that is used for nuclear power station, wherein, described gear-box is the vertical-type planetary gear reduction box, this gear-box is installed in the top of described gear box support, adopt the crowned teeth shaft coupling to be connected between this gear-box and the described motor, adopt rigid joint between this gear-box and the described pump shaft.
The above-mentioned seawater circulating water pump that is used for nuclear power station wherein, also is provided with a split type safty shield between described motor and the described crowned teeth shaft coupling.
The above-mentioned seawater circulating water pump that is used for nuclear power station wherein, is also installed a pollution discharge pump on the upper-end surface of described pump cover.
The technological scheme that is used for the seawater circulating water pump of nuclear power station of the present utility model when each side conditions such as condition of water quality, the water yield, water flow velocity, hydraulic pressure, equipment load, chamber section change, has wear resistance preferably, durability and enough self intensity.The seawater circulating water pump that is used for nuclear power station of the present utility model compared with prior art has the following advantages:
1. the concrete pump hole is provided with the gear-box aspect that a bottom with the speed reducer chamber is in same horizontal plane, and offers one and overhaul the gateway with being communicated to the gear-box aspect on the sidewall in pump hole, so overhauls in circulating water pump under the easy access personnel;
2. the cutwater at concrete spiral casing cut water place is connected in aggregatesly with upper and lower embedded part, is cast in together again on the pump hole, thereby has made things convenient for site operation and installation;
3. bearing bracket is the upper-end surface that is fixed on the pump cover that is positioned at the bearing bottom, thereby has vacateed space for maintenance, has made things convenient for the maintenance of maintainer team circulating water pump;
4. pump shaft is to be connected by the end face flange with the Placement of impeller, is convenient to both dismounting;
5. upper and lower embedded part, cutwater, impeller and pump cover all adopt the two phase stainless steel cast inblock, but that two phase stainless steel is compared the castability of high nickel cast iron is better and be convenient to repair.
Above-mentioned advantage has improved the functional reliability of recycle pump, has guaranteed that normal operation of generator and effect are remarkable.
Description of drawings
Fig. 1 is the structural representation that is used for the seawater circulating water pump of nuclear power station of the present utility model.
Embodiment
In order to understand the technical solution of the utility model better, below by embodiment particularly and be described in detail in conjunction with the accompanying drawings:
See also Fig. 1, the seawater circulating water pump that is used for nuclear power station of the present utility model, be a vertical mixed flow pump of one step single sucking, this circulating water pump comprises spiral case 11, pump hole 1, upper and lower embedded part 2,3, cutwater 4, impeller 5, pump shaft 6, pump cover 7, bearing bracket 8, mechanical seal device, bearing, gear-box 18 and motor 19.
Upper and lower embedded part 2,3 is by the two phase stainless steel cast inblock.Last embedded part 2 is positioned at the top of spiral case 11; Following embedded part 3 is positioned at the top of Pump Suction Nozzle 10; Cutwater 4 is by the two phase stainless steel cast inblock, and it is positioned at the cut water place of spiral case 11, is used for the inlet and the exit portion of branch turn on pump; The upper/lower terminal of cutwater 4 is connected in aggregates respectively with upper and lower embedded part 2,3, and cutwater 4 is cast in the pump hole 1 with upper and lower embedded part 2,3; The inner edge of following embedded part 3 is installed a spiral case seal ring 30.
The material of pump shaft 6 is the 45A forging, has enough rigidity and intensity.
Mechanical seal device is positioned at the endoporus top of pump cover 7 and is enclosed within on the pump shaft 6.Also being provided with axle sleeve 60 between this mechanical seal device and pump cover 7 and the pump shaft 6, fixedlys connected with impeller 5 by screw in the bottom of this axle sleeve 60; Axle sleeve 60 is used for avoiding pump shaft 6 directly to contact with seawater, and the attachment portion leaks on the pump shaft 6 to prevent seawater with the sealing of O type circle.Mechanical seal device comprises main shaft seal 71 and air sac sealing 72, and wherein, main shaft seal 71 is made of the flap seal element, and air sac sealing 72 comprises two aerated capsules, and these two aerated capsules cooperate with axle sleeve 60 and along the axially-aligned of pump shaft 6; Safer for guaranteeing unit operation, when termination of pumping, adopt the twice air sac sealing, can prevent the seawater perfusion; Be perfused with fresh water in the Seal cage that constitutes between mechanical seal device and the axle sleeve 60.
One pollution discharge pump 17 also is installed on the upper-end surface of pump cover 7.
Bearing is arranged in bearing chamber 12.Bearing comprises radial bearing 81 that is installed in respectively on the bearing bracket 8 and the combination bearing 82 that is installed in gear-box 9 bottoms.Wherein, radial bearing 81 is water cooling immersion oil self oiling bearing, and this bearing operation surface is a karmarsch alloy, and full circle is the blocking type tilting pad, and they can adjust the inclination angle automatically according to load; The rotation of lubricant oil by pump shaft 6 sucked by the radial hole of its underpart, and when lubricant oil overflows from the tile fragment top after completely, and the oily water cooler of flowing through cools off, and so far finished the interior circulation of lubricant oil.
Combination bearing 82 is a chain-oiled bearing, and this combination bearing 82 is made of jointly last guide bearing and thrust-bearing; The tilting pad of last guide bearing and radial bearing 81 tilting pads are interchangeable; Thrust bearing shoe valve is in order to bear the end thrust that entire pump system is produced: the thrust pad surface is karmarsch alloy, and thrust pad is circular watt, and is supported on the belleville spring, and its stressed back belleville spring can produce change in displacement; This structure have stand under load evenly, the strong advantage of buffering vibration absorption ability.Lubricant oil is gone into low pressure oil by guide shoe seat bottom oil-feed gate open usually, flows into the inboard, grease chamber from the support plate bottom, flows out to fuel tank from guide shoe seat top oil drain out after lubricated thrust bearing shoe valve and the guiding tile.
Gear-box 18 is arranged in speed reducer chamber 13.Gear-box 18 is the vertical-type planetary gear reduction box, and this gear-box 18 is installed in the top of gear box support 9, adopts rigid joint between this gear-box 18 and the pump shaft 6.
The sun gear that this vertical-type planetary gear-box is given gear-box 18 by the crowned teeth shaft coupling with the power and the transmission of movement of motor 19, sun gear drives the planetary pinion of four symmetric arrangement, ring gear is fixed, outputting power drives the rigid joint cover by pivoted frame, by rigid joint, the pump shaft 6 that drives circulating water pump rotates.Planetary pinion is an integrated type diclinic tooth, planetary pinion and internal gear can float (two float).Sun gear, planet wheel all adopt the high-quality low-carbon alloy steel, carburizing and quenching, roll flute correction of the flank shape, and that internal gear adopts is modified, roll flute, nitrogenize.Four planetary pinions rely on sliding bearing to support in pivoted frame, and planet axis is installed on the pivoted frame, has applied one deck Babbitt on the middle part external diameter of planet axis, and planet wheel rotates at the Babbitt position of planet axis.Split type left and right sides medial rotation gear, its external gear mesh with a thin-walled internal gear again, have formed comparatively desirable floating load balancing mechanism.
The lubricant oil of a constant volume is equipped with in the bottom of this gear-box 18, and it is the large tank of whole circulation water pump lubricating oil system (CGR).
The sealing of gear-box 18 and the sealed junction of bearing shell lump together, and adopt the static long sleeve isolation structure of plug-in type, and long sleeve is higher than the inside pasta of gear-box all the time, has solved the difficult problem of vertical gear case leakage of oil.
Epicyclic gearbox have radially a radial thrust combination bearing 81 with single face thrust, it except the radial force of bearing gear-box 18 and water pump, the thrust that is produced when also bearing the deadweight of deadweight, water pump rotor of the rotatable parts of gear-box 18 and pump working.When circulating water pump unit proper functioning, be to turn to rotation by work, the axial force that is produced during its work is downward, this axial force is born by combination bearing 81.During shutdown, the counter-rotating situation can take place in circulating water pump, but its total axial force is still downward.
The installation pattern of motor 19 is IM4011, and its casing and end cap are made by carbon steel, and its annex and outlet box satisfy the IP555 requirement.The stator and rotor iron core all adopts the high quality silicon steel plate to be overrided to form, and outer press mounting structure, motor have advantage convenient for installation and maintenance.Staor winding adopts vacuum pressure solvent-free paint immersion treatment, and winding overhang is fixed through colligation reliably, and winding has good integrity, strong, the reliable advantage of mechanical strength of moistureproof ability behind the dipping lacquer.The type of cooling of this motor is air water cooling (IC81W), and air/water cooler is installed in the motor case both sides, and its water-cooling tube is an alloy pipe, and shell is made by carbon steel and application salt fog resistance paint.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model the above embodiment's variation, modification.
Claims (10)
1. seawater circulating water pump that is used for nuclear power station, it is a vertical mixed flow pump of one step single sucking, described circulating water pump comprises spiral case, the pump hole, on, following embedded part, cutwater, impeller, pump shaft, pump cover, bearing bracket, bearing, mechanical seal device, gear-box and motor, described spiral case and pump hole form by the reinforced concrete of sea water resistance is integrated poured, described pump hole is positioned on the described spiral case and is provided with bearing chamber and the speed reducer chamber that is communicated with described spiral case, described upward embedded part is positioned at the top of described spiral case, described embedded part down is positioned at the top of described Pump Suction Nozzle, described cutwater is positioned at, between the following embedded part, the cut water place of spiral case, described gear-box is arranged in described speed reducer chamber, described motor is fixed on the end face in described pump hole, described gear-box is connected with the output shaft lower end of described motor and the upper end of described pump shaft respectively, it is characterized in that
The stage construction cast is divided in described pump hole, the end face in pump hole is the motor aspect, the below of this motor aspect is the gear-box aspect, the bottom of this gear-box aspect and described speed reducer chamber is on the same horizontal plane, offers a maintenance gateway that is communicated to described gear-box aspect on the sidewall of the bearing chamber in described pump hole;
The upper/lower terminal of described cutwater is connected with described upper and lower embedded part respectively, and described cutwater is cast in the described pump hole with described upper and lower embedded part;
Described impeller is arranged in described spiral case and is connected the lower end of described pump shaft by the end face flange; This impeller is provided with that install respectively at the two ends up and down of equalizing orifice and impeller, lower sealing ring;
Described pump cover is enclosed within on the described pump shaft and is fixed on described going up on the embedded part;
Described bearing bracket is fixed on the upper-end surface of described pump cover, and the upper end of this bearing bracket connects a gear box support;
Described bearing comprises the radial bearing that is installed in respectively on the described bearing bracket and is installed in the combination bearing of described gear-box bottom.
2. the seawater circulating water pump that is used for nuclear power station according to claim 1 is characterized in that described upper and lower embedded part, cutwater, impeller and pump cover are by the two phase stainless steel cast inblock.
3. the seawater circulating water pump that is used for nuclear power station according to claim 1, it is characterized in that, described mechanical seal device is positioned at the top of described pump cover and is enclosed within on the described pump shaft, also be provided with axle sleeve between this mechanical seal device and described pump cover and the described pump shaft, the lower end of this axle sleeve is connected with described impeller by screw.
4. the seawater circulating water pump that is used for nuclear power station according to claim 3 is characterized in that described mechanical seal device comprises main shaft seal and air sac sealing, and described main shaft seal is made of the flap seal element; Described air sac sealing comprises two aerated capsules, and these two aerated capsules cooperate with described axle sleeve and along the axially-aligned of pump shaft.
5. the seawater circulating water pump that is used for nuclear power station according to claim 4 is characterized in that, is perfused with fresh water in the Seal cage that constitutes between described mechanical seal device and the described axle sleeve.
6. the seawater circulating water pump that is used for nuclear power station according to claim 1 is characterized in that, be equipped with on the described down embedded part with described impeller on the spiral case seal ring of lower sealing ring coupling; The outer rim of described pump cover is equipped with the casing wear ring with the upper sealing ring of described impeller coupling.
7. the seawater circulating water pump that is used for nuclear power station according to claim 1, it is characterized in that, described combination bearing is a chain-oiled bearing, and this combination bearing is made of jointly last guide bearing and thrust-bearing, and described radial bearing is a water cooling immersion oil self oiling bearing.
8. the seawater circulating water pump that is used for nuclear power station according to claim 1, it is characterized in that, described gear-box is the vertical-type planetary gear reduction box, this gear-box is installed in the top of described gear box support, adopt the crowned teeth shaft coupling to be connected between this gear-box and the described motor, adopt rigid joint between this gear-box and the described pump shaft.
9. the seawater circulating water pump that is used for nuclear power station according to claim 8 is characterized in that, also is provided with a split type safty shield between described motor and the described crowned teeth shaft coupling.
10. the seawater circulating water pump that is used for nuclear power station according to claim 1 is characterized in that, a pollution discharge pump also is installed on the upper-end surface of described pump cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020551070 CN201818508U (en) | 2010-09-30 | 2010-09-30 | Seawater circulating pump used for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020551070 CN201818508U (en) | 2010-09-30 | 2010-09-30 | Seawater circulating pump used for nuclear power station |
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| Publication Number | Publication Date |
|---|---|
| CN201818508U true CN201818508U (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020551070 Expired - Lifetime CN201818508U (en) | 2010-09-30 | 2010-09-30 | Seawater circulating pump used for nuclear power station |
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| CN (1) | CN201818508U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943832A (en) * | 2012-11-22 | 2013-02-27 | 重庆津德福科技开发有限公司 | Hydrodynamic retarder rotating impeller |
| CN102943831A (en) * | 2012-11-22 | 2013-02-27 | 重庆津德福科技开发有限公司 | Hydrodynamic retarder |
| CN107701737A (en) * | 2017-10-31 | 2018-02-16 | 普雷沃流体控制科技（芜湖）有限公司 | Special-purpose high temperature ventilation butterfly valve and preparation method in thermal accumulating incinerator processing equipment |
-
2010
- 2010-09-30 CN CN 201020551070 patent/CN201818508U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943832A (en) * | 2012-11-22 | 2013-02-27 | 重庆津德福科技开发有限公司 | Hydrodynamic retarder rotating impeller |
| CN102943831A (en) * | 2012-11-22 | 2013-02-27 | 重庆津德福科技开发有限公司 | Hydrodynamic retarder |
| CN102943832B (en) * | 2012-11-22 | 2015-04-08 | 重庆津德福科技开发有限公司 | Hydrodynamic retarder rotating impeller |
| CN102943831B (en) * | 2012-11-22 | 2015-05-20 | 重庆津德福科技开发有限公司 | Hydrodynamic retarder |
| CN107701737A (en) * | 2017-10-31 | 2018-02-16 | 普雷沃流体控制科技（芜湖）有限公司 | Special-purpose high temperature ventilation butterfly valve and preparation method in thermal accumulating incinerator processing equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110504 Effective date of abandoning: 20120502 |