CN207082965U - 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
- CN207082965U CN207082965U CN201720964000.2U CN201720964000U CN207082965U CN 207082965 U CN207082965 U CN 207082965U CN 201720964000 U CN201720964000 U CN 201720964000U CN 207082965 U CN207082965 U CN 207082965U
- 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.)
- Active
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model 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 is 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 with being provided with the mechanical seal for being used for stopping that liquid nitrogen contacts with electric machine main shaft at 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 utility model 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 the utility model is related to the high speed pump motor technical field for transporting low temperature medium, more specifically one
The pump extension shaft frequency conversion threephase motor of kind conveying 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,
Have a strong impact on the normal use of motor.
Utility model content
The purpose of this utility model is to provide a kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen, reduced
The failure probability of the close side bearing of liquid nitrogen one on motor shaft, extend the normal use time of motor.
To achieve the above object, the utility model adopts 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 master
The stator and rotor, the radiator fan for being located at base inner that body includes support, is arranged on base inner；Motor body, which is fixed on, is in
Disk-like 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 led to provided with center
Hole；Motor shaft is the extension shaft through motor support base, including integrally formed electric machine main shaft and it is coaxial be installed in electric machine main shaft before
The power transmission shaft at end, inducer and impeller are installed on power transmission shaft；Power transmission shaft is used with being provided with the cooperation of motor support base central through hole
In the mechanical seal that stop liquid nitrogen contacts with electric machine main shaft；Radiator fan be located at the rear side of electric machine main shaft and with after electric machine main shaft
There is spacing between end face.
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 and fixed cover internal diameter and is less than fixed cover external diameter, and fixed cover abuts 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, is provided between preceding impeller and rear impeller and is used to separate preceding impeller, rear impeller
First axle sleeve.
The front side of the mechanical seal is provided with the second axle sleeve for being used for limit mechanical sealing 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 utility model, and motor shaft is by integrally formed electric machine main shaft and is fixed on motor
Front-end of spindle power transmission shaft composition, power transmission shaft include be arranged in order from front to back the first shaft part, the second shaft part, the 3rd shaft part,
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 will
Impeller and power transmission shaft are immersed in the liquid nitrogen of low temperature, and motor front end is located at and in power transmission shaft additionally by by motor support base
With setting mechanical seal at motor support base central through hole cooperation, contact of the liquid nitrogen with electric machine main shaft is blocked, therefore effectively keep away
Exempt from 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,
The service life of bearing is extended, and then extends the normal use time of motor；Radiator fan is set into electric machine main shaft
Rear side and there is spacing between electric machine main shaft rear end face, reduce motor because electric machine main shaft drives radiator fan rotation and produces
Mechanical loss, improve the efficiency of motor；Ladder before being formed between the fixed cover rear end of inducer and the second shaft part front end
Structure, hierarchic structure after being formed between the second shaft part rear end and the 3rd shaft part front end, preceding hierarchic structure and rear hierarchic structure are easy to
The installation and fixation of impeller；The for abutting and being fixed on mechanical seal front end on the 4th shaft part is provided with the front side of mechanical seal
Two axle sleeves, the axial movement occurred in the process of running forward can be sealed with limit mechanical.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
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
Embodiment of the present utility model is illustrated 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 present utility model easily.It should be clear that this specification accompanying drawing is painted
The structure shown, ratio, size etc., only to coordinate the content disclosed in specification, so that those skilled in the art understands
With reading, the enforceable qualifications of the utility model are not limited to, therefore do not have technical essential meaning, any structure
Modification, the change of proportionate relationship or the adjustment of size, do not influenceing the effect of the utility model can be generated and can reach
Purpose under, all should still fall in the range of the technology contents disclosed in the utility model are obtained and can covered.Meanwhile in this specification
The term of cited such as " on ", " under ", "front", "rear", " centre " and " one ", is merely convenient to understanding for narration, rather than
To limit the enforceable scope of the utility model, its relativeness is altered or modified, in the case where changing technology contents without essence,
When being also considered as the enforceable category of the utility model.
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
1st, motor shaft 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 outer
The disc-shaped structure of shape 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 set
There is central 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
With stator winding 16, stator winding 16 is quadrupole winding；Flange 9 on support 5 close to the front end of support 5 passes through bolt and motor branch
Seat is fixedly connected.Motor shaft 2 is extension shaft made of low temperature resistant high-strength stainless steel and runs through motor support base 4, including one into
The electric machine main shaft 10 of type and the power transmission shaft 11 for being coaxially installed in the front end of electric machine main shaft 10, the He of inducer 12 is installed on power transmission shaft 11
Impeller 13.Power transmission shaft 11 is used to stop that liquid nitrogen contacts with electric machine main shaft 10 with being provided with the cooperation of the central through hole of motor support base 4
Mechanical seal 14, electric machine main shaft 10 do not contact with liquid nitrogen, so that close to the side bearing of liquid nitrogen one on electric machine main shaft 10
Temperature can be maintained at more than -75 DEG C.Have spacing between the rear end face of radiator fan 3 and electric machine main shaft 10, i.e., radiator fan 3 with
Electric machine main shaft 10 separates, reduce motor because electric machine main shaft 10 drive radiator fan 3 rotate and caused by mechanical loss, improve
The efficiency of motor.
Power transmission shaft 11 is multi-diameter shaft, including is arranged in order from front to back and the first shaft part 17, the second shaft part of increasing diameter
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 is 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, is provided between preceding impeller 22 and rear impeller 23 and is used to separate preceding impeller
22nd, the first axle sleeve 8 of rear impeller 23.
The front side of mechanical seal 14 is provided with the second axle sleeve 7 for being used for the axial movement of limit mechanical sealing 14, and the second axle sleeve 7 is solid
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 designs 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 present utility model are designed using quadrupole, and the quadrupole of motor is designed as existing skill
Art, it will not be repeated here.
Above-described embodiment only illustrative principle of the present utility model and its effect are new not for this practicality is limited
Type.Any person skilled in the art can all be carried out without prejudice under spirit and scope of the present utility model to above-described embodiment
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the essence disclosed in the utility model
God and all equivalent modifications completed under technological thought or change, should be covered by claim of the present utility model.
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, the radiator fan for being located at base inner 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 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
The power transmission shaft of electric machine main shaft front end, inducer and impeller are installed on power transmission shaft；Power transmission shaft is matched somebody with somebody with motor support base central through hole
It is provided with conjunction and is used to stop the mechanical seal that liquid nitrogen contacts with electric machine main shaft；Radiator fan be located at the rear side of electric machine main shaft 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 be less than fixed cover external diameter, fixed cover abuts 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 is provided with the second axle sleeve for being used for limit mechanical sealing 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 |
|---|---|---|---|
| CN201720964000.2U CN207082965U (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 |
|---|---|---|---|
| CN201720964000.2U CN207082965U (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 |
|---|---|
| CN207082965U true CN207082965U (en) | 2018-03-09 |
Family
ID=61423998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720964000.2U Active CN207082965U (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) | CN207082965U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317430A (en) * | 2017-08-03 | 2017-11-03 | 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 CN201720964000.2U patent/CN207082965U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317430A (en) * | 2017-08-03 | 2017-11-03 | 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100566765C (en) | Magnetic suspension manual heart pump | |
| CN207906108U (en) | Single impeller pull rod permanent magnet rotor structure for air suspension centrifugal blower | |
| CN207082965U (en) | A kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen | |
| CN105710710A (en) | Magnetic spiral-drive type chip cleaner | |
| CN202158160U (en) | Novel magnetic transmission gear pair of transverse magnetic field | |
| CN201982337U (en) | High-speed centrifugal blower | |
| CN208337281U (en) | A kind of small brushless AC fan motor | |
| CN203562882U (en) | Three-stage-transmission brushless motor easy to assemble | |
| CN210225213U (en) | Motor assembly tool | |
| CN219492602U (en) | Permanent magnet shielding type pipeline axial flow pump | |
| CN107317430A (en) | A kind of pump extension shaft frequency conversion threephase motor for conveying liquid nitrogen | |
| CN207638488U (en) | Elevator permanent magnet direct driving motor | |
| CN206943021U (en) | A kind of Magnetic driving formula water jet propulsion pump | |
| CN109538495A (en) | No motor shaft two-stage directly drives blade electric pump | |
| CN204046311U (en) | The rotary seal mechanism of electric motor end cap and rotating shaft | |
| CN209976801U (en) | Two-stage direct-drive vane electric pump without motor shaft | |
| CN207117397U (en) | A kind of plug-in type machine shaft | |
| CN202862426U (en) | Magnetic field rotating mechanism for diamond cutting line production facility | |
| CN203522497U (en) | Non-wear induction speed-reduction variable-speed motor | |
| CN112483455A (en) | Method for improving transmission efficiency of multistage immersed pump and suspended multistage immersed pump | |
| CN202370863U (en) | Electric water pump for cooling automobile engine | |
| CN204476751U (en) | A kind of energy-efficient fluid accelerating attachment | |
| CN203822658U (en) | Fan with inner rotor motor matched with outer rotor impeller | |
| CN216767779U (en) | Direct-drive efficient impeller | |
| CN211681258U (en) | Grinding device for inner hole of pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 312300 Shangyu Economic Development Zone, Shaoxing City, Zhejiang Province Co-patentee after: WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GROUP CO., LTD. Patentee after: Wolong Electric Drive Group Co., Ltd. Address before: 312300 Shangyu Economic Development Zone, Shaoxing City, Zhejiang Province Co-patentee before: WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GROUP CO., LTD. Patentee before: Wolong Electric Group Co., Ltd. |