CN107317430A - A kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen - Google Patents
A kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen Download PDFInfo
- Publication number
- CN107317430A CN107317430A CN201710656947.1A CN201710656947A CN107317430A CN 107317430 A CN107317430 A CN 107317430A CN 201710656947 A CN201710656947 A CN 201710656947A CN 107317430 A CN107317430 A CN 107317430A
- Authority
- CN
- China
- Prior art keywords
- shaft
- motor
- liquid nitrogen
- shaft part
- electric machine
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- 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
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/124—Sealing of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The present invention discloses a kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen, including motor body and motor shaft, motor body be fixed on disc-shaped structure and with the motor support base of motor body coaxial line, motor support base is located at the front end of motor body and provided with central through hole；Motor shaft is through the extension shaft of motor support base, including integrally formed electric machine main shaft and power transmission shaft；Power transmission shaft is used to stop the mechanical seal that liquid nitrogen is contacted with electric machine main shaft with being provided with the cooperation of motor support base central through hole；Radiator fan is located at the rear side of electric machine main shaft and has spacing between electric machine main shaft rear end face.The present invention at the cooperation of power transmission shaft and motor support base central through hole by setting mechanical seal, block contact of the liquid nitrogen with electric machine main shaft, it effectively prevent the relatively low phenomenon of the bearing temperature of close liquid nitrogen side on electric machine main shaft, reduce the probability of bearing grease failure, bearing service life is extended, and then extends the normal use time of motor.
Description
Technical field
It is more specifically a kind of defeated the present invention relates to the high speed pump motor technical field for transporting low temperature medium
Send the pump extension shaft frequency conversion threephase motor of liquid nitrogen.
Background technology
In the course of conveying of liquid nitrogen, it is sometimes desirable to be driven transmission by pump, this pump is generally by electronic
Machine drives impeller to realize, impeller and motor shaft front end are immersed in the liquid nitrogen that temperature reaches -196 DEG C.Existing motor
Axle is shorter, because impeller and motor shaft front end are immersed in the liquid nitrogen of low temperature for a long time, can cause on motor shaft close to liquid
The bearing temperature of nitrogen side is relatively low, and when temperature is less than -75 DEG C, the lubricating grease of bearing will fail, and then cause bearing failure,
The normal of motor is had a strong impact on to use.
The content of the invention
It is an object of the invention to provide a kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen, motor is reduced
Close to the failure probability of the side bearing of liquid nitrogen one on axle, the normal use time of motor is extended.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen, including motor body and motor shaft, motor body bag
Support is included, the stator and rotor of base inner is arranged on, is located at the radiator fan of base inner；Motor body is fixed on disc-shaped
Structure and with the motor support base of motor body coaxial line, motor support base is located at the front end of motor body and provided with central through hole；
Motor shaft is the extension shaft through motor support base, including integrally formed electric machine main shaft and is coaxially installed in electric machine main shaft front end
Inducer and impeller are installed on power transmission shaft, power transmission shaft；Power transmission shaft is used to hinder with being provided with the cooperation of motor support base central through hole
The mechanical seal that gear liquid nitrogen is contacted with electric machine main shaft；Radiator fan be located at electric machine main shaft rear side and with electric machine main shaft rear end face
Between have spacing.
The power transmission shaft is multi-diameter shaft, including be arranged in order from front to back and the first shaft part of increasing diameter, the second shaft part,
3rd shaft part, the 4th shaft part and the 5th shaft part；Inducer is set on the first shaft part, and the main body of impeller is set in the second shaft part
On.
Inducer includes blade and fixed cover, and blade is circumferentially located on the anterior periphery of fixed cover, and the second shaft part is straight
Footpath is more than fixed cover internal diameter and less than fixed cover external diameter, and fixed cover is abutted with the front end face of the second shaft part, fixed cover rear end and the
Hierarchic structure before being formed between two shaft part front ends；Hierarchic structure after being formed between second shaft part rear end and the 3rd shaft part front end；Leaf
Wheel is fastened between preceding hierarchic structure and rear hierarchic structure.
Impeller includes preceding impeller and rear impeller, and being provided between preceding impeller and rear impeller is used to separate preceding impeller, rear impeller
First axle sleeve.
The front side of the mechanical seal, which is provided with, is used for the second axle sleeve that limit mechanical seals axial movement, and the second axle sleeve is fixed
Abutted on the 4th shaft part and with the front end of mechanical seal, the main body of mechanical seal is set on the 5th shaft part.
First shaft part, the second shaft part, the 3rd shaft part, the diameter of the 4th shaft part and the 5th shaft part be respectively 21 ~ 23mm,
26~28mm、31~33mm、34~36mm、39~41mm。
The supply frequency scope of motor is in 3 ~ 180Hz.
Flange on support close to support front end is fixedly connected by bolt with motor support base.
Stator includes stator core and stator winding, and stator winding is quadrupole winding.
The motor shaft is made up of low temperature resistant high-strength stainless steel.
Motor shaft is designed to extension shaft by the present invention, and motor shaft is by integrally formed electric machine main shaft and is fixed on electric machine main shaft
The power transmission shaft composition of front end, power transmission shaft includes the first shaft part being arranged in order from front to back, the second shaft part, the 3rd shaft part, the 4th
Shaft part and the 5th shaft part, the main body of impeller is set on the second shaft part, during liquid nitrogen is conveyed, it is only necessary to by impeller
It is immersed in power transmission shaft in the liquid nitrogen of low temperature, motor front end is located at and in power transmission shaft and electricity additionally by by motor support base
Mechanical seal is set at machine bearing central through hole cooperation, contact of the liquid nitrogen with electric machine main shaft is blocked, therefore effectively prevent
The relatively low phenomenon of the bearing temperature of close liquid nitrogen side on electric machine main shaft, reduces the probability of bearing grease failure, extension
The service life of bearing, and then extend the normal use time of motor；Radiator fan is set to the rear side of electric machine main shaft
And have spacing between electric machine main shaft rear end face, reduce the machine that motor is produced by electric machine main shaft drive radiator fan rotation
Tool is lost, and improves the efficiency of motor；Hierarchic structure before being formed between the fixed cover rear end of inducer and the second shaft part front end,
Hierarchic structure after being formed between second shaft part rear end and the 3rd shaft part front end, preceding hierarchic structure and rear hierarchic structure are easy to impeller
Install with fixing；The second axle for abutting and being fixed on the 4th shaft part with mechanical seal front end is provided with the front side of mechanical seal
Set, can seal the axial movement occurred in the process of running forward with limit mechanical.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the internal structure schematic diagram of motor body in Fig. 1；
Fig. 3 is enlarged drawing at A in Fig. 1.
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.It should be clear that structure depicted in this specification accompanying drawing,
Ratio, size etc., only to coordinate the content disclosed in specification, so that those skilled in the art is understood with reading, and
It is not used to limit enforceable qualifications of the invention, therefore does not have technical essential meaning, the modification of any structure, ratio is closed
The change of system or the adjustment of size, in the case where not influenceing effect of the invention that can be generated and the purpose that can reach, all should still fall
In the range of disclosed technology contents are obtained and can covered.Meanwhile, in this specification it is cited as " on ", " under ",
The term of "front", "rear", " centre " and " one " etc., is merely convenient to understanding for narration, and is not used to limit the present invention and can implement
Scope, its relativeness is altered or modified, under without essence change technology contents, when being also considered as enforceable model of the invention
Farmland.
As shown in Figure 1 to Figure 3, a kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen, including motor body 1, electricity
Arbor 2 and positioned at the inside of motor body 1 and it is fixed on the radiator fan 3 at the rear portion of motor shaft 2.Motor body 1 is fixed on profile
Disk-like structure and with the motor support base 4 of the coaxial line of motor body 1, motor support base 4 is located at the front end of motor body 1 and is provided with
Heart through hole.Motor body 1 includes support 5, the stator 6 and rotor being located inside support 5, and stator 6 includes stator core 15 and fixed
Sub- winding 16, stator winding 16 is quadrupole winding；Flange 9 on support 5 close to the front end of support 5 is consolidated by bolt and motor support base
Fixed connection.Motor shaft 2 is the extension shaft that is made of low temperature resistant high-strength stainless steel and through motor support base 4, including integrally formed
Inducer 12 and impeller are installed on electric machine main shaft 10 and the power transmission shaft 11 for being coaxially installed in the front end of electric machine main shaft 10, power transmission shaft 11
13.Power transmission shaft 11 is used to stop the machine that liquid nitrogen is contacted with electric machine main shaft 10 with being provided with the cooperation of the central through hole of motor support base 4
Tool sealing 14, electric machine main shaft 10 is not contacted with liquid nitrogen so that on electric machine main shaft 10 close to liquid nitrogen one side bearing temperature
Degree can be maintained at more than -75 DEG C.There are spacing, i.e. radiator fan 3 and motor between the rear end face of radiator fan 3 and electric machine main shaft 10
Main shaft 10 is separated, and is reduced the mechanical loss that motor drives radiator fan 3 to rotate and producing because of electric machine main shaft 10, is improved electricity
The efficiency of motivation.
Power transmission shaft 11 be multi-diameter shaft, including be arranged in order from front to back and increasing diameter the first shaft part 17, the second shaft part
18th, the 3rd shaft part 19, the 4th shaft part 20 and the 5th shaft part 21, the first shaft part 17, the second shaft part 18, the 3rd shaft part 19, the 4th axle
The diameter of the shaft part 21 of section 20 and the 5th is respectively 21 ~ 23mm, 26 ~ 28mm, 31 ~ 33mm, 34 ~ 36mm, 39 ~ 41mm.Inducer 12
It is set on the first shaft part 17, the main body of impeller 13 is set on the second shaft part 18.
Inducer 12 includes blade 24 and fixed cover 25, and blade 24 is circumferentially located on the anterior periphery of fixed cover 25,
The diameter of second shaft part 18 is more than the internal diameter of fixed cover 25 and less than the external diameter of fixed cover 25, the front end face of the shaft part 18 of fixed cover 25 and second
Abut, hierarchic structure before being formed between the rear end of fixed cover 25 and the front end of the second shaft part 18；The rear end of second shaft part 18 and the 3rd shaft part
Hierarchic structure after being formed between 19 front ends；Impeller 13 is fastened between preceding hierarchic structure and rear hierarchic structure.
Impeller 13 includes preceding impeller 22 and rear impeller 23, and being provided between preceding impeller 22 and rear impeller 23 is used to separate preceding impeller
22nd, the first axle sleeve 8 of rear impeller 23.
The front side of mechanical seal 14, which is provided with, is used for the second axle sleeve 7 that limit mechanical seals 14 axial movements, and the second axle sleeve 7 is consolidated
It is scheduled on the 4th shaft part 20 and is abutted with the front end of mechanical seal 14, the main body of mechanical seal 14 is set on the 5th shaft part 21.
The output power of motor of the present embodiment is designed according to 55kW, and the corresponding reference frequency of motor is 100Hz, because
The supply frequency scope of this motor is in 3 ~ 180Hz.
Motor shaft is made up of low temperature resistant high-strength stainless steel in the present embodiment, and this material is not led in the rotor of motor
Magnetic.Under the premise of motor shaft is non-magnetic, if the stator and rotor of motor are designed using the two poles of the earth, motor stator will be separated
The magnetic circuit of son and rotor, therefore, motor of the invention are designed using quadrupole, and the quadrupole of motor is designed as prior art,
This is repeated no more.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen, including motor body and motor shaft, motor body
Including support, it is arranged on the stator and rotor of base inner, is located at the radiator fan of base inner, it is characterised in that：Motor master
Body be fixed on disc-shaped structure and with the motor support base of motor body coaxial line, motor support base be located at motor body front end and
Provided with central through hole；Motor shaft is the extension shaft through motor support base, including integrally formed electric machine main shaft and is coaxially installed in
Inducer and impeller are installed on the power transmission shaft of electric machine main shaft front end, power transmission shaft；Power transmission shaft is matched somebody with somebody with motor support base central through hole
Being provided with conjunction is used to stop the mechanical seal that liquid nitrogen is contacted with electric machine main shaft；Radiator fan be located at electric machine main shaft rear side and with
There is spacing between electric machine main shaft rear end face.
2. the pump extension shaft frequency conversion threephase motor of conveying liquid nitrogen according to claim 1, it is characterised in that：It is described
Power transmission shaft is multi-diameter shaft, including is arranged in order from front to back and the first shaft part of increasing diameter, the second shaft part, the 3rd shaft part,
Four shaft parts and the 5th shaft part；Inducer is set on the first shaft part, and the main body of impeller is set on the second shaft part.
3. the pump extension shaft frequency conversion threephase motor of conveying liquid nitrogen according to claim 2, it is characterised in that：Induction
Wheel includes blade and fixed cover, and blade is circumferentially located on the anterior periphery of fixed cover, and the second shaft section diameter is more than fixed cover
Internal diameter and less than fixed cover external diameter, fixed cover is abutted with the front end face of the second shaft part, fixed cover rear end and the second shaft part front end it
Between formed before hierarchic structure；Hierarchic structure after being formed between second shaft part rear end and the 3rd shaft part front end；Impeller is fastened on preceding rank
Between terraced structure and rear hierarchic structure.
4. the pump extension shaft frequency conversion threephase motor of conveying liquid nitrogen according to claim 3, it is characterised in that：Impeller
The first axle sleeve for being used for separating preceding impeller, rear impeller is provided with including preceding impeller and rear impeller, between preceding impeller and rear impeller.
5. the pump extension shaft frequency conversion threephase motor of conveying liquid nitrogen according to claim 3, it is characterised in that：It is described
The front side of mechanical seal, which is provided with, is used for the second axle sleeve that limit mechanical seals axial movement, and the second axle sleeve is fixed on the 4th shaft part
And abutted with the front end of mechanical seal, the main body of mechanical seal is set on the 5th shaft part.
6. the pump extension shaft frequency conversion threephase motor of conveying liquid nitrogen according to claim 5, it is characterised in that：It is described
First shaft part, the second shaft part, the 3rd shaft part, the diameter of the 4th shaft part and the 5th shaft part be respectively 21 ~ 23mm, 26 ~ 28mm, 31 ~
33mm、34~36mm、39~41mm。
7. the pump extension shaft frequency conversion threephase motor of conveying liquid nitrogen according to claim 6, it is characterised in that：It is electronic
The supply frequency scope of machine is in 3 ~ 180Hz.
8. the pump extension shaft frequency conversion threephase motor of conveying liquid nitrogen according to claim 1, it is characterised in that：Support
The upper flange close to support front end is fixedly connected by bolt with motor support base.
9. the pump extension shaft frequency conversion threephase motor of conveying liquid nitrogen according to claim 1, it is characterised in that：Stator
Including stator core and stator winding, stator winding is quadrupole winding.
10. the pump extension shaft frequency conversion threephase motor of conveying liquid nitrogen according to any one of claim 1 to 9, its
It is characterised by：The motor shaft is made up of low temperature resistant high-strength stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710656947.1A CN107317430A (en) | 2017-08-03 | 2017-08-03 | A kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710656947.1A CN107317430A (en) | 2017-08-03 | 2017-08-03 | A kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107317430A true CN107317430A (en) | 2017-11-03 |
Family
ID=60170030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710656947.1A Pending CN107317430A (en) | 2017-08-03 | 2017-08-03 | A kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107317430A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005069116A (en) * | 2003-08-25 | 2005-03-17 | Ebara Corp | Pump |
| CN101846085A (en) * | 2010-06-08 | 2010-09-29 | 江苏大学 | Frequency conversion high-speed wet type submersible pump |
| CN103573651A (en) * | 2013-11-08 | 2014-02-12 | 成都安迪生测量有限公司 | LNG immersed pump |
| CN104564709A (en) * | 2014-12-25 | 2015-04-29 | 江苏大学 | Method for realizing single-double stage impeller replacement in high-speed mine submersible pump |
| CN104895800A (en) * | 2015-05-19 | 2015-09-09 | 淄博博山绿源燃气设备有限公司 | Multi-stage submersible pump system |
| CN105811609A (en) * | 2016-04-26 | 2016-07-27 | 湖南耐普泵业股份有限公司 | Submerged type cryogenic permanent magnet electric pump |
| CN106133326A (en) * | 2013-11-28 | 2016-11-16 | 艾希蒂有限公司 | For LNG, lighter hydrocarbons and other non-conductive and low temperature submersible pumps of non-corrosive fluids |
| CN207082965U (en) * | 2017-08-03 | 2018-03-09 | 卧龙电气集团股份有限公司 | A kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen |
-
2017
- 2017-08-03 CN CN201710656947.1A patent/CN107317430A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005069116A (en) * | 2003-08-25 | 2005-03-17 | Ebara Corp | Pump |
| CN101846085A (en) * | 2010-06-08 | 2010-09-29 | 江苏大学 | Frequency conversion high-speed wet type submersible pump |
| CN103573651A (en) * | 2013-11-08 | 2014-02-12 | 成都安迪生测量有限公司 | LNG immersed pump |
| CN106133326A (en) * | 2013-11-28 | 2016-11-16 | 艾希蒂有限公司 | For LNG, lighter hydrocarbons and other non-conductive and low temperature submersible pumps of non-corrosive fluids |
| CN104564709A (en) * | 2014-12-25 | 2015-04-29 | 江苏大学 | Method for realizing single-double stage impeller replacement in high-speed mine submersible pump |
| CN104895800A (en) * | 2015-05-19 | 2015-09-09 | 淄博博山绿源燃气设备有限公司 | Multi-stage submersible pump system |
| CN105811609A (en) * | 2016-04-26 | 2016-07-27 | 湖南耐普泵业股份有限公司 | Submerged type cryogenic permanent magnet electric pump |
| CN207082965U (en) * | 2017-08-03 | 2018-03-09 | 卧龙电气集团股份有限公司 | A kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen |
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