CN109026722A - A kind of LNG immersed pump - Google Patents
A kind of LNG immersed pump Download PDFInfo
- Publication number
- CN109026722A CN109026722A CN201810916751.6A CN201810916751A CN109026722A CN 109026722 A CN109026722 A CN 109026722A CN 201810916751 A CN201810916751 A CN 201810916751A CN 109026722 A CN109026722 A CN 109026722A
- Authority
- CN
- China
- Prior art keywords
- immersed pump
- lng
- pump
- magneto
- impeller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- F04D1/08—Multi-stage pumps the stages being situated concentrically
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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
- F04D29/041—Axial thrust balancing
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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
- F04D29/18—Rotors
- F04D29/185—Rotors consisting of a plurality of wheels
-
- 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
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2238—Special flow patterns
- F04D29/225—Channel wheels, e.g. one blade or one flow channel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of LNG immersed pumps, belong to equipment technical field.The LNG immersed pump, including immersed pump ontology, inlet and liquid outlet.The immersed pump solves the problems, such as to improve service life of equipment using the abrasion that axial thrust balancing device reduces equipment by shaft coupling connection bring centering in conventional pump.Working efficiency can be improved using magneto in the present invention, reduces small product size.Compared to asynchronous machine, magneto, which does not need external energy, can establish very strong permanent-magnetic field, and motor feels hot is smaller, it is possible to reduce the vaporization of LNG.Sencond stage impeller therein, one stage impeller and inducer are all connected on motor shaft, do not need shaft coupling in this way, without considering centering problem, improve the stability of pump.Inducer is made of 4 helical blades and wheel hub, and effect is the flow for improving impeller eye, improves the anti-cavitation performance of impeller.In short, the LNG immersed pump is reasonable in design, work efficiency is high, small in size, is suitble to promote the use of.
Description
Technical field
The present invention relates to a kind of LNG immersed pumps, belong to equipment technical field.
Background technique
LNG is the abbreviation of liquefied natural gas (liquefied natural gas).Main component is methane.LNG is colourless,
Tasteless, nontoxic and non-corrosive, volume is about the 1/600 of same amount gaseous natural gas volume.Therefore liquefied natural gas is natural
The effective means of gas storage and transport, is rapidly developed in recent years.
LNG immersed pump be it is a kind of will pump with motor integral installation in sealed metal container, can accomplish zero leakage, avoid
Explosive atmosphere is generated, the transportation of liquefied natural gas of ignition condition and the core drive output equipment of associated low temperature liquid are eliminated,
It includes: the research of LNG immersed pump electrical equipment, mainly low temperature electrically insulating material that independent development, which needs the critical issue solved, at present
The lubrication technical research of the Seal Technology Study at research, electrical connection, latent liquid type motor with cryocable and motor
Low-temperature working characteristic several respects；The research of the LNG immersed pump pump housing, mainly LNG cavitation law study, low temperature immersed pump leaf in pumping
Wheel and induction wheel construction are designed at the research of optimization and LNG immersed pump self-balancing mechanism.
LNG has obtained great development with transport as the clean energy resource greatly developed at present, storage in recent years.LNG
For immersed pump as the major impetus device in LNG industry, demand is increasing.Due to the low-temperature characteristics of LNG, in LNG pump
Power unit, i.e. motor have very high requirement.The motor used in existing LNG immersed pump is asynchronous machine, in the mistake of work
Cheng Zhonghui is generated compared with lossy, and efficiency is lower.
In order to solve the above-mentioned technical problem, the present invention devises a kind of LNG immersed pump, which uses a motor
Axis solves the problems, such as to connect bring centering by shaft coupling in conventional pump, reduces equipment using axial thrust balancing device
Abrasion improve service life of equipment.Working efficiency can be improved using magneto in the present invention, reduces small product size.Compared to different
Motor is walked, magneto, which does not need external energy, can establish very strong permanent-magnetic field, and motor feels hot is smaller, it is possible to reduce
The vaporization of LNG.Sencond stage impeller therein, one stage impeller and inducer are all connected on motor shaft, do not need shaft coupling in this way,
Without considering centering problem, the stability of pump is improved.Inducer is made of 4 helical blades and wheel hub, and effect is to improve impeller
The flow of entrance improves the anti-cavitation performance of impeller.In short, the LNG immersed pump is reasonable in design, work efficiency is high, volume
It is small, it is suitble to promote the use of.
Summary of the invention
In order to overcome defect present in background technique, the technical solution adopted by the present invention to solve the technical problems is:
A kind of LNG immersed pump, including immersed pump ontology, inlet and liquid outlet, the bottom sides of the immersed pump ontology be equipped with into
Liquid mouth, the surface of the immersed pump ontology are equipped with liquid outlet, are equipped with magneto, the Permanent Magnet and Electric in the immersed pump ontology
Motor shaft in machine is arranged on upper bearing (metal) and lower bearing, and the outside of the motor shaft is equipped with permanent magnet machine rotor, the permanent magnetism
Corresponding permanent magnet machine rotor is equipped with permanent magnet motor stator in motor, and the lower section of the lower bearing is filled equipped with axial thrust balancing
It sets, the lower section of the motor shaft lifting force balancing device is successively fixed with sencond stage impeller, one stage impeller and inducer.
The preferred upper bearing (metal) and lower bearing are low temperature rolling bearing.
The present invention devises a kind of LNG immersed pump, which uses a motor shaft, solve and pass through connection in conventional pump
Axis device connects bring centering problem, improves service life of equipment using the abrasion that axial thrust balancing device reduces equipment.
Working efficiency can be improved using magneto in the present invention, reduces small product size.Compared to asynchronous machine, magneto does not need outer
Add energy that can establish very strong permanent-magnetic field, motor feels hot is smaller, it is possible to reduce the vaporization of LNG.Sencond stage impeller therein,
One stage impeller and inducer are all connected on motor shaft, do not need shaft coupling in this way, without considering centering problem, improve pump
Stability.Inducer is made of 4 helical blades and wheel hub, and effect is the flow for improving impeller eye, improves the anti-vapour of impeller
Corrosion energy.In short, the LNG immersed pump is reasonable in design, work efficiency is high, small in size, is suitble to promote the use of.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is a kind of schematic internal view of LNG immersed pump of the present invention；
Wherein: 1, upper bearing (metal)；2, permanent magnet machine rotor；3, permanent magnet motor stator；4, motor shaft；5, lower bearing；6, axial thrust
Balancing device；7, sencond stage impeller；8, one stage impeller；9, inducer；10, immersed pump ontology；11, inlet；12, liquid outlet.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.Attached drawing is simplified schematic diagram, only with signal side
Formula illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
Specific embodiment one, referring to Fig. 1, a kind of LNG immersed pump, including immersed pump ontology 10, inlet 11 and liquid out
Mouth 12, the bottom sides of the immersed pump ontology 10 are equipped with inlet 11, and the surface of the immersed pump ontology 10 is equipped with
Liquid mouth 12, the immersed pump ontology 10 is interior to be equipped with magneto, and the motor shaft 4 in the magneto is arranged in 1 He of upper bearing (metal)
On lower bearing 5, the outside of the motor shaft 4 is equipped with permanent magnet machine rotor 2, corresponding permanent magnet machine rotor in the magneto
2 are equipped with permanent magnet motor stator 3, and the lower section of the lower bearing 5 is equipped with axial thrust balancing device 6, and 4 lifting force of motor shaft is flat
The lower section of weighing apparatus device 6 is successively fixed with sencond stage impeller 7, one stage impeller 8 and inducer 9, and the upper bearing (metal) 1 and lower bearing 5 are low
Warm rolling bearing.
The present invention devises a kind of LNG immersed pump, which uses a motor shaft, solve and pass through connection in conventional pump
Axis device connects bring centering problem, improves service life of equipment using the abrasion that axial thrust balancing device reduces equipment.
Working efficiency can be improved using magneto in the present invention, reduces small product size.Compared to asynchronous machine, magneto does not need outer
Add energy that can establish very strong permanent-magnetic field, motor feels hot is smaller, it is possible to reduce the vaporization of LNG.Sencond stage impeller therein,
One stage impeller and inducer are all connected on motor shaft, do not need shaft coupling in this way, without considering centering problem, improve pump
Stability.Inducer is made of 4 helical blades and wheel hub, and effect is the flow for improving impeller eye, improves the anti-vapour of impeller
Corrosion energy.In short, the LNG immersed pump is reasonable in design, work efficiency is high, small in size, is suitble to promote the use of.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (2)
1. a kind of LNG immersed pump, including immersed pump ontology (10), inlet (11) and liquid outlet (12), it is characterised in that: described
The bottom sides of immersed pump ontology (10) are equipped with inlet (11), and the surface of the immersed pump ontology (10) is equipped with liquid outlet
(12), magneto is equipped in the immersed pump ontology (10), the motor shaft (4) in the magneto is arranged in upper bearing (metal)
(1) and on lower bearing (5), the outside of the motor shaft (4) is equipped with permanent magnet machine rotor (2), corresponding in the magneto
Permanent magnet machine rotor (2) is equipped with permanent magnet motor stator (3), and the lower section of the lower bearing (5) is equipped with axial thrust balancing device
(6), the lower section of motor shaft (4) the lifting force balancing device (6) is successively fixed with sencond stage impeller (7), one stage impeller (8) and lures
Guide wheel (9).
2. a kind of LNG immersed pump according to claim 1, which is characterized in that the upper bearing (metal) (1) and lower bearing (5) are
Low temperature rolling bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810916751.6A CN109026722A (en) | 2018-08-13 | 2018-08-13 | A kind of LNG immersed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810916751.6A CN109026722A (en) | 2018-08-13 | 2018-08-13 | A kind of LNG immersed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109026722A true CN109026722A (en) | 2018-12-18 |
Family
ID=64633841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810916751.6A Pending CN109026722A (en) | 2018-08-13 | 2018-08-13 | A kind of LNG immersed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109026722A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2853744A1 (en) * | 1978-12-13 | 1980-06-26 | Klein Schanzlin & Becker Ag | UNDERWATER MOTOR PUMP |
| CN104389795A (en) * | 2014-10-31 | 2015-03-04 | 湖州三井低温设备有限公司 | LNG (Liquefied Natural Gas) immersed pump |
| CN206352595U (en) * | 2016-08-29 | 2017-07-25 | 山东长志泵业有限公司 | A kind of heavily loaded LNG low temperature immersed pump |
| CN107218251A (en) * | 2017-06-06 | 2017-09-29 | 武汉船用机械有限责任公司 | A kind of pump head device |
| CN107681822A (en) * | 2017-09-25 | 2018-02-09 | 湖南大学 | Efficient cryogenic motor for latent liquid type LNG pump |
-
2018
- 2018-08-13 CN CN201810916751.6A patent/CN109026722A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2853744A1 (en) * | 1978-12-13 | 1980-06-26 | Klein Schanzlin & Becker Ag | UNDERWATER MOTOR PUMP |
| CN104389795A (en) * | 2014-10-31 | 2015-03-04 | 湖州三井低温设备有限公司 | LNG (Liquefied Natural Gas) immersed pump |
| CN206352595U (en) * | 2016-08-29 | 2017-07-25 | 山东长志泵业有限公司 | A kind of heavily loaded LNG low temperature immersed pump |
| CN107218251A (en) * | 2017-06-06 | 2017-09-29 | 武汉船用机械有限责任公司 | A kind of pump head device |
| CN107681822A (en) * | 2017-09-25 | 2018-02-09 | 湖南大学 | Efficient cryogenic motor for latent liquid type LNG 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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181218 |