CN207420888U - The main cooling water pump of used in nuclear power station - Google Patents
The main cooling water pump of used in nuclear power station Download PDFInfo
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- CN207420888U CN207420888U CN201721328742.2U CN201721328742U CN207420888U CN 207420888 U CN207420888 U CN 207420888U CN 201721328742 U CN201721328742 U CN 201721328742U CN 207420888 U CN207420888 U CN 207420888U
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- Prior art keywords
- pump
- shaft
- power station
- cooling water
- nuclear power
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Abstract
The utility model provides a kind of main cooling water pump of used in nuclear power station, including：Concrete spiral casing, and it is placed in the pump group part in concrete spiral casing, the motor being placed in above concrete spiral casing, the pump group part includes pump shaft, impeller and the pump housing, the motor is connected with pump shaft transmission, upper supporting piece is embedded in advance in the concrete spiral casing, cutwater and lower support ring, upper supporting piece, cutwater and lower support ring are the component that welding is formed and are preset with bolt hole, upper supporting piece and cutwater, the cutwater is connected with lower support ring by the bolt being threaded through in corresponding bolt hole respectively, the upper supporting piece is connected with the pump cover in the pump housing, lower support ring is connected with the bottom of the pump housing.The upper supporting piece, cutwater and lower support ring of the utility model are formed using welding, preset bolt hole thereon, need to be only connected with each other upper supporting piece, cutwater and lower support ring by bolt in construction with this, easy for construction.
Description
Technical field
The utility model is related to water pump technologies, are pumped more particularly to a kind of main cooling water of used in nuclear power station.
Background technology
The function of nuclear power station main cooling water pump is cold necessary to be provided to the condenser and supplement heat rejecter water system of steam turbine
But water is mainly pumped at present using concrete volute pump as main cooling water.Main cooling water pump belongs to large scale equipment, the existing core in the country
Every, power station unit is commonly provided with two main cooling water pumps and works at the same time, and does not set stand-by pump.Concrete volute pump is a kind of pump case
In the mixed-flow pump of scroll casing shape.The rotating speed of concrete volute pump is much lower with respect to centrifugal pump, generally rotating speed 200r/min with
Under.In general, the motor of driving concrete volute pump operating by after gear-box speed change between the pump shaft 9 that is located in pump case in succession
It connects, gear-box needs to lubricate using lubricating oil system.This connection mode is to reduce motor by the speed change of gear-box
Output speed, so as to obtain the rotating speed of concrete volute pump needs.Concrete volute pump using this connection mode is extensive
Applied to domestic and international nuclear power station, advantage is that can adjust the output speed of motor as requested to adapt to the requirement of water pump；Shortcoming
It is：The construction of concrete volute pump is more difficult, time-consuming and laborious for the installation of pump group part；Reliability reduces, because of gear-box
In the presence of increase mechanical breakdown probability；The lubricating oil system and control system of gearbox configuration complexity, equipment operation maintenance are complicated.
Therefore one kind is needed to be easy to construction and installation, is easy to the main cooling water pump of operation and maintenance.
Utility model content
In view of the foregoing deficiencies of prior art, the purpose of this utility model is to provide a kind of master of used in nuclear power station is cold
But water pump, for solving the problems, such as that the concrete volute pump construction that main cooling water pump uses in the prior art is difficult.
In order to achieve the above objects and other related objects, the utility model provides a kind of main cooling water pump of used in nuclear power station,
It includes：Concrete spiral casing and the pump group part being placed in concrete spiral casing, the motor being placed in above concrete spiral casing are described
Pump group part includes pump shaft, impeller and the pump housing, and the motor is connected with pump shaft transmission, is embedded in advance in the concrete spiral casing
Upper supporting piece, cutwater and lower support ring, upper supporting piece, cutwater and lower support ring are the component that welding is formed and preset
There is a bolt hole, upper supporting piece and cutwater, the cutwater and lower the support ring spiral shell by being threaded through in corresponding bolt hole respectively
Bolt is connected, and the upper supporting piece is connected with the pump cover in the pump housing, and lower support ring is connected with the bottom of the pump housing.
Preferably, the motor shaft of the motor is connected by shaft coupling with the pump shaft.
Preferably, the guide shaft bearing assembly for supporting the pump shaft, the guide shaft bearing assembly bag are equipped in the concrete spiral casing
Guide bearing stent and guide bearing are included, pump shaft is threaded through in guide bearing, and guide bearing is water cooling immersion oil self-lubricating bearing.
Preferably, packing seal component is equipped between the pump cover and the pump shaft, on the pump shaft below the guide bearing
Equipped with retaining ring.
Preferably, the pump shaft outside the concrete spiral casing is placed in a protective cover.
Preferably, the impeller is connected with the pump shaft by flange, and impeller is equipped with upper and lower sealing ring.
Preferably, the impeller is equipped with balance hole and fair water cone.
Preferably, protective case and axle sleeve are equipped between the impeller and the pump shaft, the boss surfaces are coated with tungsten carbide.
As described above, the main cooling water pump of the used in nuclear power station of the utility model, has the advantages that：Concrete spiral casing
Interior built-in fitting, i.e., above-mentioned upper supporting piece, cutwater and lower support ring are formed using welding, bolt hole are preset thereon, with this
Upper supporting piece, cutwater and lower support ring need to be only connected with each other by bolt in construction, it is easy for construction；In addition, this
The motor shaft of utility model motor is connected by shaft coupling with pump shaft, is simplified concrete volute pump used in existing nuclear power station and is used
Gear tooth case drive mechanism, improve its use reliability.
Description of the drawings
Fig. 1 is shown as the main cooling water pump schematic diagram of the used in nuclear power station of the utility model.
Component label instructions
1 concrete spiral casing
2 times support rings
3 cutwaters
4 upper supporting pieces
5 manholes
6 motor support frames
7 motors
8 water inlet flow channels
9 spiral casing flow passages
10 impellers
11 air sac sealing components
12 protective cases
13 axle sleeves
14 packing seal components
15 retaining rings
16 guide shaft bearing assemblies
17 pump shafts
18 shaft couplings
19 protective covers
Specific embodiment
Illustrate the embodiment of the utility model by particular specific embodiment below, those skilled in the art can be by this
Content disclosed by specification understands other advantages and effect of the utility model easily.
It please refers to Fig.1.It should be clear that structure, ratio, size depicted in this specification institute attached drawing etc., only coordinating
The revealed content of specification, so that those skilled in the art understands and reads, being not limited to the utility model can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of the utility model can be generated and the purpose that can reach, should all still fall in the utility model institute
In the range of the technology contents of announcement can be covered.Meanwhile in this specification it is cited as " on ", " under ", "left", "right",
The term of " centre " and " one " etc. is merely convenient to understanding rather than to limit the enforceable scope of the utility model for narration,
Its relativeness is altered or modified, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the utility model.
As shown in Figure 1, the utility model provides a kind of main cooling water pump of used in nuclear power station, including：Concrete spiral casing 1,
And the pump group part in the spiral casing flow passage 9 of concrete spiral casing is placed in, it is placed in the motor 7 of 1 top of concrete spiral casing, the pump group part
Including pump shaft 17, impeller 10 and the pump housing, the motor 7 is connected with the pump shaft 17 transmission, pre- embedded in the concrete spiral casing 1
There are upper supporting piece 4, cutwater 3 and lower support ring 2, upper supporting piece 4, cutwater 3 and lower support ring 2 are the component that welding is formed
And bolt hole is preset with, upper supporting piece 4 and cutwater 3, the cutwater 3 and lower support ring 2 are corresponding by being threaded through respectively
Bolt in bolt hole is connected, and the upper supporting piece 4 is connected with the pump cover in the pump housing, lower support ring 2 and the pump housing
Bottom is connected.The utility model is using upper supporting piece 4, cutwater 3 and the lower support ring 2 that welding is formed as built-in fitting, three
Bolt hole is preset with above, therefore in installation, it only need to can be by upper supporting piece 4, cutwater 3 and lower branch by bolt
2 three of pushing out ring is connected, time saving and energy saving convenient for construction.
Use reliability is pumped to improve the main cooling water of entire used in nuclear power station, and the motor shaft of motor 7 passes through in the present embodiment
Shaft coupling 18 is connected with the pump shaft 17.The shaft coupling is positive coupling, and motor and pump shaft are by the way of direct-connected.This implementation
Example in motor 7 be arranged on motor support frame 6, use large-scale vertical cage induction motor, axial force caused by pump group by
Motor is born.
To improve the stability of pump shaft operation, the present embodiment is equipped on concrete spiral casing 1 and supports leading for the pump shaft 17
Bearing assembly 16, the guide shaft bearing assembly include guide bearing stent and guide bearing, and pump shaft 17 is threaded through in guide bearing, and guide bearing
For water cooling immersion oil self-lubricating bearing.The present embodiment makes whole in the guide shaft bearing assembly 16 of the top extension supporting pump shaft 17 of pump cover
A pump shaft 17 has at multiple supports, stabilizes it operation.
To realize better seal, packing seal component 14 is equipped between pump cover and the pump shaft 17 in the present embodiment, in institute
It states the pump shaft below guide bearing and is equipped with retaining ring 15.Packing seal component 14 includes stuffing-box, gland and seal cage, fills out
Expect that letter, gland and seal cage are two halves fabricated structure, it is easy to disassemble.The setting of retaining ring 15 is prevented from filler
In seawater splash to the guide bearing leaked at seal assembly, corrode guide bearing.
Preferably to protect above-mentioned pump shaft, the pump shaft 17 that the present embodiment is located at outside concrete spiral casing 1 is placed in a protective cover 19
It is interior.Protective cover is combined by two parts, is easily installed and dismantles to divide half structure, using protective cover by exposed shaft coupling
Device 18 and pump shaft 17 are protected in place.Protective cover 19 is provided with active window at above-mentioned guide bearing, convenient for Pilot bearing
Interior addition lubricating oil.
Impeller 10 is integrally cast using 1.4468 two phase stainless steels in the present embodiment, and balance hole is provided on impeller 10
And fair water cone.Pump shaft 17 selects 45 forging, and boss is formed with pump shaft 17 using solid forging, and impeller 10 passes through with pump shaft 17
Flange is connected, and is more convenient for processing than long key connection mode, assemble and disassemble.And impeller 10 is equipped with replaceable upper and lower sealing ring, improves
The service life of impeller.
To improve service life, protective case 12 and axle sleeve 13, institute are equipped between impeller 10 and the pump shaft 17 in the present embodiment
It states 13 surface of axle sleeve and is coated with tungsten carbide, tungsten carbide improves the wearability of axle sleeve.Axle sleeve 13 and protective case 12 use
1.4462 double coherent correlations form, and coordinate with pump shaft 17 and install, seawater is isolated with the pump shaft of this section, using seal with O ring, prevent
Only seawater penetrates into internal corrosion pump shaft 17.
The main cooling water of the used in nuclear power station of the present embodiment pumps, what the spiral casing flow passage 9 in concrete spiral casing 1 was surrounded with concrete
Water inlet flow channel 8 is connected, and concrete foundation is equipped with the manhole 5 entered for construction personnel in concrete spiral casing 1, is sealed to improve
Property, the present embodiment is additionally provided with air sac sealing component 11 at impeller 10.
In conclusion the main cooling water pump of the used in nuclear power station of the utility model, upper supporting piece, cutwater and lower support ring
It is formed using welding, presets bolt hole thereon, it only need to be by bolt by upper supporting piece, cutwater and lower branch in construction with this
Pushing out ring is connected with each other, easy for construction；In addition, the motor shaft of the utility model motor is connected by shaft coupling with pump shaft, letter
Change the gear tooth case drive mechanism that concrete volute pump used in existing nuclear power station uses, improve its use reliability.So
The utility model effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above embodiments are only illustrative of the principle and efficacy of the utility model, new not for this practicality is limited
Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model
God and all equivalent modifications completed under technological thought or change, should be covered by the claim of the utility model.
Claims (8)
1. a kind of main cooling water pump of used in nuclear power station, which is characterized in that including：Concrete spiral casing and it is placed in concrete spiral casing
Interior pump group part, the motor being placed in above concrete spiral casing, the pump group part include pump shaft, impeller and the pump housing, the motor with
Pump shaft transmission is connected, and is embedded with upper supporting piece, cutwater and lower support ring in the concrete spiral casing in advance, upper supporting piece,
Cutwater and lower support ring are the component that welding is formed and are preset with bolt hole, and upper supporting piece and cutwater described divide water
Angle is connected with lower support ring by the bolt being threaded through in corresponding bolt hole respectively, the upper supporting piece and the pump in the pump housing
Lid is connected, and lower support ring is connected with the bottom of the pump housing.
2. the main cooling water pump of used in nuclear power station according to claim 1, it is characterised in that：The motor shaft of the motor passes through
Shaft coupling is connected with the pump shaft.
3. the main cooling water pump of used in nuclear power station according to claim 1, it is characterised in that：It is equipped in the concrete spiral casing
The guide shaft bearing assembly of the pump shaft is supported, the guide shaft bearing assembly includes guide bearing stent and guide bearing, and pump shaft is threaded through guide shaft
In holding, and guide bearing is water cooling immersion oil self-lubricating bearing.
4. the main cooling water pump of used in nuclear power station according to claim 3, it is characterised in that：Between the pump cover and the pump shaft
Equipped with packing seal component, retaining ring is equipped on the pump shaft below the guide bearing.
5. the main cooling water pump of used in nuclear power station according to claim 1, it is characterised in that：Outside the concrete spiral casing
Pump shaft be placed in a protective cover.
6. the main cooling water pump of used in nuclear power station according to claim 1, it is characterised in that：The impeller leads to the pump shaft
It crosses flange to be connected, and impeller is equipped with upper and lower sealing ring.
7. the main cooling water pump of used in nuclear power station according to claim 1, it is characterised in that：The impeller is equipped with balance hole
And fair water cone.
8. the main cooling water pump of used in nuclear power station according to claim 1, it is characterised in that：Between the impeller and the pump shaft
Equipped with protective case and axle sleeve, the boss surfaces are coated with tungsten carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721328742.2U CN207420888U (en) | 2017-10-16 | 2017-10-16 | The main cooling water pump of used in nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721328742.2U CN207420888U (en) | 2017-10-16 | 2017-10-16 | The main cooling water pump of used in nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207420888U true CN207420888U (en) | 2018-05-29 |
Family
ID=62311414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721328742.2U Active CN207420888U (en) | 2017-10-16 | 2017-10-16 | The main cooling water pump of used in nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207420888U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620715A (en) * | 2017-10-16 | 2018-01-23 | 上海阿波罗机械股份有限公司 | The main cooling water pump of used in nuclear power station |
-
2017
- 2017-10-16 CN CN201721328742.2U patent/CN207420888U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620715A (en) * | 2017-10-16 | 2018-01-23 | 上海阿波罗机械股份有限公司 | The main cooling water pump of used in nuclear power station |
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