CN107687425A - Vertical multi-stage vacuum and low temperature immersed pump - Google Patents
Vertical multi-stage vacuum and low temperature immersed pump Download PDFInfo
- Publication number
- CN107687425A CN107687425A CN201710716136.6A CN201710716136A CN107687425A CN 107687425 A CN107687425 A CN 107687425A CN 201710716136 A CN201710716136 A CN 201710716136A CN 107687425 A CN107687425 A CN 107687425A
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- China
- Prior art keywords
- motor
- pump
- armature spindle
- casing
- stage
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- 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.)
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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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
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- 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
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- 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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of vertical multi-stage vacuum and low temperature immersed pump, mainly, it is made up of motor part, pump head part, armature spindle, bearing block, bar, pump pond；Bearing block is equipped with pump head part by bearings armature spindle, the upper end of armature spindle equipped with motor part, lower end, and motor part and pump head part are connected as in the pump for being integrally placed at a closing pond by bar.The pump motor uses superconducting motor, and motor does not generate heat, and does not influence LNG gasification and the lubrication to bearing, and electromagnetic property is not affected by temperature, and does not produce magnetic current loop；Motor is provided with displacement transducer, and the amount of floating of rotor can be monitored in real time.Bushing bearing seat can be changed at any time as consumable accessory, easy processing, can reduce maintenance, reduce operating cost.Set chopped-off head axle sleeve to can reach the best match of inducer and impeller between inducer and impeller, the lift and efficiency of pump group can be improved.The pump configuration is reasonable, and performance is high, cheap, is immersed pump in a kind of comparatively ideal cryogenic tank.
Description
Technical field
The present invention relates to a kind of centrifugal pumping apparatus of technical field of LNG application, transporting low temperature medium is especially adapted for use in
Vertical multi-stage vacuum and low temperature immersed pump.
Background technology
LNG is liquefied natural gas (liquefiednaturalgas) abbreviation.Main component is methane.LNG is colourless, nothing
Taste, nontoxic and non-corrosiveness.Develop liquefied natural gas (LNG) industry, turn into adjustment Energy Mix, alleviate to oil supply
Rely on the major action with pressure, guarantee Chinese energy safety.In the whole industrial chains of LNG, it exports, transported, receiving, profit
With waiting links all to use low temperature immersed pump, this makes LNG low temperature transport pump to play very important angle in industrial chain
Color.LNG pump pond immersed pump is that one kind is sealing pump and motor integral installation in vacuum heat-insulation canister, can accomplish zero
Leakage, avoid producing explosive atmosphere, eliminate the transportation of liquefied natural gas of ignition condition and the core drive of associated low temperature liquid
Output equipment.Because pumped (conveying) medium has low temperature, inflammable, explosive and easy vaporization a characteristic, condition of work is severe.Therefore to conveying
The pumping unit of such medium requires the characteristics of sealed reliable, operation fluid loss are small and structure safety and stability is reliable.So
This kind of pump design difficulty is big, manufacture and experiment are difficult, therefore at present, in domestic such a cryogenic tank immersed pump all by import,
Cause the problems such as valuable product, operating cost is high occur.
The content of the invention
In order to overcome the shortcomings of above-mentioned technology, high it is an object of the invention to provide a kind of performance, cheap is vertical
Multi-stage vacuum low temperature immersed pump.
Realizing the technical scheme that the purpose of the present invention uses is：The vertical multi-stage vacuum and low temperature immersed pump is mainly by motor section
Point, pump head part, armature spindle, bearing block, bar, pump pond composition；Bearing block passes through bearings armature spindle, the upper end of armature spindle
Pump head part is housed equipped with motor part, lower end, motor part and pump head part are connected as one and are integrally placed at closing by bar
Pump pond in.
Described motor part includes lid, displacement motor sensor, bearing on electric machine assembly, armature spindle, motor casing, motor
Back-up ring, butterfly spring, upper lid, lower cover；Motor casing is built with electric machine assembly, and the upper end of motor casing, which is equipped with motor, to be covered, on motor
It is connected with bushing bearing seat in lid, the bearings in bearing block have armature spindle, and end ring is cased with the armature spindle of bearing upper end
And butterfly spring, armature spindle upper end are equipped with displacement motor sensor, motor top cap is connected to lid；The lower end connection of motor casing
There is lower cover, lower cover is built with support rotor shaft bearings seat；Described motor is superconducting motor.
Described pump head part is mainly made up of armature spindle, stator, impeller, inducer, Spit Section, stage casing, suction casing；Institute
It is connected with final stage bushing, final stage axial direction stator, casing ring, impeller ring, end on the lower cover lower end armature spindle stated in turn
Level impeller, middle axle sleeve, interstage bushing, axial stator, first stage impeller, chopped-off head axle sleeve, inducer and axis head nut；Axially lead
Leaf is fixed on interstage bushing by bolt, and taper chopped-off head axle sleeve is between inducer and first stage impeller；Positioned at lower cover lower end
Spit Section, stage casing, suction casing are connected with the outside of impeller.
Described motor casing outside communicates provided with bottom with Spit Section inner chamber, top communicates discharging tube with upper cover cavity, on
The chamber exit of lid is the discharge opening of pump.
Lid, lower cover, suction casing, stage casing, Spit Section on motor are fixed together by described bar.
Cable and signal wire interface and gas exhaust piping are housed on the cover plate in described pump pond.
The beneficial effects of the invention are as follows：Due to using superconducting motor：Motor does not generate heat, and does not influence LNG gasification and to axle
The lubrication held；Electromagnetic property is not affected by temperature, and detent torque, which is not affected by temperature, to be directly initiated, and the startup time is short, without
Separately match somebody with somebody facility because starting；Magnetic current loop is not produced.Motor is provided with displacement transducer simultaneously, and the amount of floating of rotor can be entered
Row monitoring in real time.Due to can be changed at any time as consumable accessory using bushing bearing holder structure, consumable accessory easy processing, can reduce
Maintenance period, reduce operating cost.Chopped-off head axle sleeve is set to can reach the optimal of inducer and impeller between inducer and impeller
Matching, because induction impeller blade can produce tail in liquid stream, and when the tail falls when on centrifugal wheel inlet vane, it can influence
The lift and efficiency of centrifugal wheel, so structure can improve the lift and efficiency of pump group.Under extra-high or low discharge, inside spiral case
Uneven operating mode is produced, so as to form radial load, the imbalance of radial load can shorten bearing life, and axial stator is relative with liquid stream
Should, under normal operation range, hydraulic pressure is symmetrically very perfect, pump is not produced by radial load in operation.In a word, the pump configuration
Rationally, performance is high, cheap, is immersed pump in a kind of comparatively ideal cryogenic tank.
4th, illustrate
Fig. 1 is the sectional structure chart of vertical multi-stage vacuum and low temperature immersed pump of the present invention.
In figure：1. interstage bushing, 2. impellers, 3. casing rings, 4. lower covers, 5. final stage bushings, 6. discharging tubes,
7. armature spindle, 8. end rings, 9. butterfly springs, the gas exhaust piping of 10. cable interface 11., 12. pump ponds, 13. displacement motors pass
Sensor, cover on 14., covered on 15. motors, 16. rods, 17. electric machine assemblies, 18. motor casings, 19. bearing blocks, 20. final stage axles
To stator, 21. impeller rings, 22. Spit Sections, 23. middle axle sleeves, 24. axial stators, 25. first stage impellers, 26. chopped-off head axles
Set, 27. inducers, 28. suction casings, 29 axis head nuts, 30. stage casings.
5th, embodiment
In the accompanying drawings, vertical multi-stage vacuum and low temperature immersed pump of the present invention, mainly by motor part, pump head part, armature spindle, bearing
Seat, bar, pump pond composition；Bearing block 19 is filled by bearings armature spindle 7, the upper end of armature spindle 7 equipped with motor part, lower end
There is pump head part, motor part and pump head part are connected as in the pump for being integrally placed at a closing pond 12 by bar 16.
Described motor part passes including lid 15, displacement motor on electric machine assembly 17, armature spindle 7, motor casing 18, motor
Sensor 13, end ring 8, butterfly spring 9, upper lid 14, lower cover 4；Motor casing 18 built with electric machine assembly 17, motor casing 18
Upper end is connected with bushing bearing seat 19 equipped with lid 15 on motor in lid 15 on motor, the bearings in bearing block 19 have rotor
Axle 7, bearing block 19 are provided with end ring 8 and butterfly spring 9 with bearing, and end ring 8 can realize dynamical reaction with butterfly spring 9
Buffering and axial force it is balanced compensated.The upper end of armature spindle 7 is equipped with displacement motor sensor 13, can be to the amount of floating of rotor
Monitored in real time, realize electric motor protecting.Lid 15 is connected with lid 14 on motor；The lower end of motor casing 18 is connected with lower cover 4, under
Lid 4 is built with the support bearing block 19 of armature spindle 7；Described motor is superconducting motor, the benefit using superconducting motor be motor not
Heating, does not influence LNG gasification and the lubrication to bearing；Electromagnetic property is not affected by temperature, and detent torque is not affected by temperature
It can directly initiate, the startup time is short, without separately matching somebody with somebody facility because starting；Magnetic current loop is not produced.
Described pump head part is mainly made up of armature spindle, stator, impeller, inducer, Spit Section, stage casing, suction casing；
It is connected with final stage bushing 5, final stage axial direction stator 20, casing ring 3, impeller in turn on the armature spindle 7 of the lower end of lower cover 4
Sealing ring 21, impeller 2, middle axle sleeve 23, interstage bushing 1, axial stator 24, first stage impeller 25, chopped-off head axle sleeve 26, induction
Wheel 27 and axis head nut 29；Axial stator 24 is fixed on interstage bushing 1 by bolt, and taper chopped-off head axle sleeve 26 is located at inducer 27
Between first stage impeller 25；The anti-ballistic impeller structure of axial stator 24 can current stabilization, pressure conversion, reduction of speed, water conservancy diversion and elimination can be carried out
Rotational component；Chopped-off head axle sleeve 26 is set between inducer 27 and first stage impeller 25, reaches inducer 27 and impeller chopped-off head 25
Best match.Spit Section 22, stage casing 30, suction casing 28 are connected with the outside of the impeller of the lower end of lower cover 4.Suction casing 28 and axle
The working chamber of first stage impeller 25 is formed to stator 24, Spit Section 22 forms the working chamber of impeller 2 with final stage axial direction stator 20.
The described outside of motor casing 18 communicates provided with bottom with the inner chamber of Spit Section 22, top communicates discharge opeing with the upper inner chamber of lid 14
Pipe 6, the chamber exit of upper lid 14 are the discharge opening of pump.Described bar 16 is by lid on motor 14, lower cover 4, suction casing 28, stage casing
30th, Spit Section 22 is fixed together.Cable and signal wire interface 10 and blast pipe are housed on the cover plate in described pump pond 12
Road 11.
LNG liquefied natural gas enters in pump pond from the population in pump pond 12, is inhaled in the presence of rotary blade from suction casing 28
Enter, stage casing 30, Spit Section 22 through pump, discharging tube 6, the chamber exit of lid 14 exports from motor.
Claims (6)
1. a kind of vertical multi-stage vacuum and low temperature immersed pump, mainly by motor part, pump head part, armature spindle, bearing block, bar,
Pump pond forms；It is characterized in that：Described bearing block (19) by bearing rotary support armature spindle (7), armature spindle (7) it is upper
End is equipped with pump head part equipped with motor part, lower end, and motor part and pump head part are connected as an entirety and put by bar (16)
In the pump pond (12) of closing.
2. vertical multi-stage vacuum and low temperature immersed pump as claimed in claim 1, described motor part include electric machine assembly (17),
Armature spindle (7), motor casing (18), (15), displacement motor sensor (13), end ring (8), butterfly spring are covered on motor
(9), upper lid (14), lower cover (4)；Motor casing (18) is built with electric machine assembly (17), and the upper end of motor casing (18) is equipped with motor
Cover (15), covered on motor in (15) and be connected with bearing block (19), the bearings in bearing block (19) have armature spindle (7), motor
Upper lid (15) is connected with lid (14)；The lower end of motor casing (18) is connected with lower cover (4), and lower cover (4) is built with support armature spindle
(7) bearing block (19)；It is characterized in that：Described bearing block (19) for ease of replacing bushing bearing seat (19), on bearing
End ring (8) and butterfly spring (9) are cased with end armature spindle (7), armature spindle (7) upper end is equipped with displacement motor sensor
(13)。
3. vertical multi-stage vacuum and low temperature immersed pump as claimed in claim 1, described pump head part mainly by armature spindle, lead
Leaf, impeller, inducer, Spit Section, stage casing, suction casing are formed；It is connected with turn on described lower cover (4) lower end armature spindle (7)
Final stage bushing (5), final stage axial direction stator (20), casing ring (3), impeller ring (21), impeller (2), jackshaft
Cover (23), interstage bushing (1), axial stator (24), first stage impeller (25), chopped-off head axle sleeve (26), inducer (27) and spindle nose spiral shell
Female (29)；Described lower cover (4) lower end impeller is externally connected with Spit Section (22), stage casing (30), suction casing (28)；Its feature exists
In：Described axial stator (24) is fixed on interstage bushing (1) by bolt, and taper chopped-off head axle sleeve (26) is located at inducer (27)
Between first stage impeller (25).
4. vertical multi-stage vacuum and low temperature immersed pump as claimed in claim 1, it is characterised in that：On the outside of described motor casing (18)
Communicated provided with bottom with Spit Section (22) inner chamber, top communicates discharging tube (6) with upper lid (14) inner chamber, the inner chamber of upper lid (14) goes out
Mouth is the discharge opening of pump.
5. vertical multi-stage vacuum and low temperature immersed pump as claimed in claim 1, it is characterised in that：Described bar (16) is by electricity
Lid (14), lower cover (4), suction casing (28), stage casing (30), Spit Section (22) are fixed together on machine.
6. vertical multi-stage vacuum and low temperature immersed pump as claimed in claim 1, it is characterised in that：The cover plate in described pump pond (12)
It is upper that cable and signal wire interface (10) and gas exhaust piping (11) are housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710716136.6A CN107687425A (en) | 2017-08-21 | 2017-08-21 | Vertical multi-stage vacuum and low temperature immersed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710716136.6A CN107687425A (en) | 2017-08-21 | 2017-08-21 | Vertical multi-stage vacuum and low temperature immersed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107687425A true CN107687425A (en) | 2018-02-13 |
Family
ID=61153543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710716136.6A Withdrawn CN107687425A (en) | 2017-08-21 | 2017-08-21 | Vertical multi-stage vacuum and low temperature immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107687425A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701465A (en) * | 2017-10-20 | 2018-02-16 | 项达章 | Vertical vacuum low temperature immersed pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202483903U (en) * | 2012-02-28 | 2012-10-10 | 浙江机电职业技术学院 | Liquefied natural gas (LNG) immersed pump |
| CN103821732A (en) * | 2014-02-24 | 2014-05-28 | 中国海洋石油总公司 | Vertical pump pool multi-stage immersed pump |
| CN105114333A (en) * | 2015-08-17 | 2015-12-02 | 杭州新亚低温科技有限公司 | LNG immersed pump used in ships |
| CN205136045U (en) * | 2015-09-29 | 2016-04-06 | 辽宁长志泵业有限公司 | Vertical multistage vacuum low temperature immersed pump |
-
2017
- 2017-08-21 CN CN201710716136.6A patent/CN107687425A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202483903U (en) * | 2012-02-28 | 2012-10-10 | 浙江机电职业技术学院 | Liquefied natural gas (LNG) immersed pump |
| CN103821732A (en) * | 2014-02-24 | 2014-05-28 | 中国海洋石油总公司 | Vertical pump pool multi-stage immersed pump |
| CN105114333A (en) * | 2015-08-17 | 2015-12-02 | 杭州新亚低温科技有限公司 | LNG immersed pump used in ships |
| CN205136045U (en) * | 2015-09-29 | 2016-04-06 | 辽宁长志泵业有限公司 | Vertical multistage vacuum low temperature immersed pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701465A (en) * | 2017-10-20 | 2018-02-16 | 项达章 | Vertical vacuum low temperature immersed pump |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180213 |