CN107829940A - Vertical multi-stage vacuum and low temperature immersed pump - Google Patents
Vertical multi-stage vacuum and low temperature immersed pump Download PDFInfo
- Publication number
- CN107829940A CN107829940A CN201710987703.1A CN201710987703A CN107829940A CN 107829940 A CN107829940 A CN 107829940A CN 201710987703 A CN201710987703 A CN 201710987703A CN 107829940 A CN107829940 A CN 107829940A
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- China
- Prior art keywords
- pump
- motor
- armature spindle
- casing
- stage
- 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.)
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Classifications
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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
- 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
- F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
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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
- F04D29/04—Shafts or bearings, or assemblies thereof
-
- 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
-
- 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
- F04D29/40—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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K55/00—Dynamo-electric machines having windings operating at cryogenic temperatures
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
First, technical field
The present invention relates to a kind of centrifugal pumping apparatus of technical field of LNG application, the vertical of transporting low temperature medium is especially adapted for use in
Multi-stage vacuum low temperature immersed pump.
2nd, background technology
LNG is liquefied natural gas (liquefiednaturalgas) abbreviation.Main component is methane.LNG is colourless, tasteless, nothing
Poison and non-corrosiveness.Develop liquefied natural gas (LNG) industry, turn into adjustment Energy Mix, alleviate dependence to oil supply and
Pressure, the major action for ensureing Chinese energy safety.In the whole industrial chains of LNG, it is each that it exports, transported, receiving, utilizing etc.
Link will all use low temperature immersed pump, and this makes LNG low temperature transport pump to play very important role in industrial chain.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
Explosive atmosphere is produced, eliminates the transportation of liquefied natural gas of ignition condition and the core drive output equipment of associated low temperature liquid.
Because pumped (conveying) medium has low temperature, inflammable, explosive and easy vaporization a characteristic, condition of work is severe.Therefore to conveying such medium
Pumping unit to require sealed reliable, operation fluid loss small and the characteristics of structure safety and stability is reliable.So this kind of pump is set
It is difficult to count big difficulty, manufacture and experiment, therefore at present, immersed pump causes to occur all by import in domestic such a cryogenic tank
The problems such as valuable product, high operating cost.
3rd, the content of the invention
In order to overcome the shortcomings of above-mentioned technology, vertical multi-stage high it is an object of the invention to provide a kind of performance, cheap
Vacuum and 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；Axial stator
It is fixed on by bolt on interstage bushing, taper chopped-off head axle sleeve is between inducer and first stage impeller；Leaf positioned at lower cover lower end
Wheel outside is connected with Spit Section, stage casing, suction casing.
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 carried out
Monitoring in real time.Due to can be changed at any time as consumable accessory using bushing bearing holder structure, consumable accessory easy processing, dimension can be reduced
The cycle is protected, reduces operating cost.Chopped-off head axle sleeve is set to can reach optimal of inducer and impeller between inducer and impeller
Match somebody with somebody, because induction impeller blade can produce tail in liquid stream, and when the tail falls when on centrifugal wheel inlet vane, can influence from
The lift and efficiency of heart wheel, so structure can improve the lift and efficiency of pump group.Under extra-high or low discharge, produced inside spiral case
Raw uneven operating mode, 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 includes lid 15, displacement motor sensing on electric machine assembly 17, armature spindle 7, motor casing 18, motor
Device 13, end ring 8, butterfly spring 9, upper lid 14, lower cover 4；Motor casing 18 is built with electric machine assembly 17, the upper end of motor casing 18
Equipped with lid on motor 15, bushing bearing seat 19 is connected with motor in lid 15, the bearings in bearing block 19 have armature spindle 7,
Bearing block 19 is provided with end ring 8 and butterfly spring 9 with bearing, and end ring 8 can realize the buffering of dynamical reaction with butterfly spring 9
And axial force is balanced compensated.The upper end of armature spindle 7 is equipped with displacement motor sensor 13, the amount of floating of rotor can be carried out real
When monitor, 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, in lower cover 4
Equipped with the support bearing block 19 of armature spindle 7；Described motor is superconducting motor, and the benefit using superconducting motor is that motor does not generate heat,
LNG gasification and the lubrication to bearing are not influenceed；Electromagnetic property is not affected by temperature, and detent torque is not affected by temperature can be direct
Start, 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；Position
In being connected with final stage bushing 5, final stage axial direction stator 20, casing ring 3, impeller seals on the armature spindle 7 of the lower end of lower cover 4 in turn
Ring 21, impeller 2, middle axle sleeve 23, interstage bushing 1, axial stator 24, first stage impeller 25, chopped-off head axle sleeve 26, inducer 27
With 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 and head
Between level impeller 25；The anti-ballistic impeller structure of axial stator 24 can current stabilization, can carry out pressure conversion, reduction of speed, water conservancy diversion and eliminate rotation
Component；Chopped-off head axle sleeve 26 is set between inducer 27 and first stage impeller 25, reaches the optimal of inducer 27 and impeller chopped-off head 25
Matching.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 is with axially leading
Leaf 24 forms the working chamber of first stage impeller 25, and 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 by bar (16)
It is placed 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 includes electric machine assembly
(17), armature spindle (7), motor casing (18), (15), displacement motor sensor (13), end ring (8), butterfly bullet are covered on motor
Spring (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 electricity
(15) to be covered on machine, is covered on motor in (15) and is connected with bearing block (19), the bearings in bearing block (19) have armature spindle (7),
(15) are covered on motor and are connected with lid (14)；The lower end of motor casing (18) is connected with lower cover (4), and lower cover (4) turns built with support
Sub- axle (7) bearing block (19)；It is characterized in that：Described bearing block (19) is for ease of the bushing bearing seat (19) of replacing, axle
Hold and end ring (8) and butterfly spring (9) are cased with upper end armature spindle (7), armature spindle (7) upper end passes 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), centre
Axle sleeve (23), interstage bushing (1), axial stator (24), first stage impeller (25), chopped-off head axle sleeve (26), inducer (27) and spindle nose
Nut (29)；Described lower cover (4) lower end impeller is externally connected with Spit Section (22), stage casing (30), suction casing (28)；Its feature
It is：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：Described motor casing (18) is outside
Side communicates provided with bottom with Spit Section (22) inner chamber, top communicates discharging tube (6) with upper lid (14) inner chamber, upper to cover the interior of (14)
Chamber outlet 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 lid in described pump pond (12)
Cable and signal wire interface (10) and gas exhaust piping (11) are housed on plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710987703.1A CN107829940A (en) | 2017-10-21 | 2017-10-21 | Vertical multi-stage vacuum and low temperature immersed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710987703.1A CN107829940A (en) | 2017-10-21 | 2017-10-21 | Vertical multi-stage vacuum and low temperature immersed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107829940A true CN107829940A (en) | 2018-03-23 |
Family
ID=61648605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710987703.1A Withdrawn CN107829940A (en) | 2017-10-21 | 2017-10-21 | Vertical multi-stage vacuum and low temperature immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107829940A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210004A (en) * | 2018-08-24 | 2019-01-15 | 武汉船用机械有限责任公司 | A kind of immersed pump pump pond |
-
2017
- 2017-10-21 CN CN201710987703.1A patent/CN107829940A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210004A (en) * | 2018-08-24 | 2019-01-15 | 武汉船用机械有限责任公司 | A kind of immersed pump pump pond |
| CN109210004B (en) * | 2018-08-24 | 2020-08-25 | 武汉船用机械有限责任公司 | Pump pool of 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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180323 |