CN109281864A - A kind of sealing structure of magnetic suspension air blower - Google Patents
A kind of sealing structure of magnetic suspension air blower Download PDFInfo
- Publication number
- CN109281864A CN109281864A CN201811294845.0A CN201811294845A CN109281864A CN 109281864 A CN109281864 A CN 109281864A CN 201811294845 A CN201811294845 A CN 201811294845A CN 109281864 A CN109281864 A CN 109281864A
- Authority
- CN
- China
- Prior art keywords
- impeller
- sealing
- high speed
- spindle nose
- speed shaft
- 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.)
- Granted
Links
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
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/263—Rotors specially for elastic fluids mounting fan or blower 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of sealing structures of magnetic suspension air blower, motor rear end plate center is provided with circular hole, high speed shaft spindle nose is set in circular hole, impeller one end is connected with high speed shaft spindle nose, the impeller other end is connected with impeller locknut one end, impeller pull bar one end end is set in high speed shaft spindle nose, impeller pull bar is set to impeller and impeller locknut inner hub location, impeller locknut is connect with impeller pull bar spiral, impeller is provided with several sealing air drains close to the end face of high speed shaft spindle nose one side, motor rear end plate is equipped with radial labyrinth sealing close to impeller on one side, radial labyrinth sealing uses flat helical teeth structure, radial labyrinth air-tight movable is set in sealing air drain, the inventive structure is simple, it is compact, it is easy for installation, reduce impeller back leakage rate, prevent high-temperature gas from entering magnetic suspension bearing, radial labyrinth sealing simultaneously can reduce drum The axially mounted distance of blower improves critical rotor isolative interval and operation stability.
Description
Technical field
The present invention relates to air blower technical field of sealing technology, specially a kind of sealing structure of magnetic suspension air blower.
Background technique
Magnetic suspension centrifugal blower is one kind using the turbine plant of magnetic suspension bearing.Its primary structure is air vane
Wheel, which is directly installed on, to be clicked on axis elongated end, and rotor is suspended vertically on active magnetic bearing controller.It does not need to increase
Fast device and shaft coupling, realization are directly driven by high-speed motor, the single machine high-speed centrifugal blower adjusted the speed by frequency converter.Such wind
Machine uses integrated design, high-speed motor, frequency converter, magnetic bearing control system and adopts equipped with microprocessor control panel etc.
With integrated design and integrate.Its core is magnetic suspension bearing and magneto technology.
Conventional fan impeller installation procedure is complicated, once installation occurs, it may appear that the case where loosening, general impeller and electricity
Can all there be a distance between machine end plate, it is possible to because high-temperature gas enters Bearing inner, and bearing is damaged, because
This, it would be highly desirable to a kind of improved technology solves the problems, such as this in the presence of the prior art.
Summary of the invention
The purpose of the present invention is to provide a kind of sealing structure of magnetic suspension air blower, magnetic suspension air blower impeller is directly outstanding
It is hung on high speed shaft spindle nose, it is compact-sized, it is easy for installation；The radial labyrinth at impeller back seals, and reduces the leakage of impeller back
Amount, prevents high-temperature gas from entering magnetic suspension bearing, causes overtemperature to damage bearing, while radial labyrinth sealing can reduce air blower
Axially mounted distance, critical rotor isolative interval and operation stability are improved, to solve mentioned above in the background art ask
Topic.
To achieve the above object, the invention provides the following technical scheme: a kind of sealing structure of magnetic suspension air blower, including
Motor rear end plate, high speed shaft spindle nose, impeller, impeller locknut, impeller pull bar, sealing air drain and radial labyrinth sealing, the motor
End plate center is provided with circular hole, and the high speed shaft spindle nose is set in circular hole, described impeller one end and high speed shaft spindle nose phase
Even, the impeller other end is connected with impeller locknut one end, and described impeller pull bar one end end is set in high speed shaft spindle nose, institute
It states impeller pull bar and is set to impeller and impeller locknut inner hub location, the impeller locknut is connect with impeller pull bar spiral, institute
It states impeller and is provided with several sealing air drains close to the end face of high speed shaft spindle nose one side, the motor rear end plate is installed close to impeller one side
There is radial labyrinth sealing, the radial labyrinth sealing uses flat helical teeth structure, and the radial labyrinth air-tight movable is set to sealing
In air drain.
Preferably, the motor rear end plate surface is provided with impeller slot, and the motor rear end plate is located at impeller slot inner surface
It is provided with annular groove, the radial labyrinth is seal-installed in annular groove.
Preferably, the radial labyrinth sealing includes mounting plate and annular projection, and the mounting plate is ring structure, described
Installation plate surface is evenly arranged with several annular projections.
Preferably, the sealing air drain is annular, and the quantity of the sealing air drain is consistent with the quantity of annular projection, described
Annular projection is movably set in sealing air drain and is not in contact with impeller.
Preferably, the impeller includes impeller bodies and blade, impeller bodies connection high speed shaft spindle nose one end outside
It is movably set in impeller slot, if the impeller bodies are evenly arranged with cured leaf far from connection high speed shaft spindle nose one end outer surface
Piece.
Preferably, application method the following steps are included:
Step 1: radial labyrinth sealing is fixedly mounted in the annular groove of motor rear end plate inner surface, and will be after motor
End plate is connected with motor housing and is tightened by screw installation, and high speed shaft spindle nose is placed exactly in the circular hole of motor rear end plate at this time
It is interior；
Step 2: impeller pull bar one end is connected with high speed shaft spindle nose；
Impeller: being first installed on the outside of impeller pull bar by step 3, then impeller locknut is installed on the outside of impeller pull bar, by impeller lock
Mother's locking, impeller locknut and impeller are closely coupled, and the annular projection of radial labyrinth sealing at this time is just set in sealing air drain,
And annular projection is not in contact with impeller；
Step 4: driving, high speed shaft spindle nose impeller pull rod rotation, so that impeller rotates are opened.
Compared with prior art, the beneficial effects of the present invention are:
(1) magnetic suspension air blower impeller is directly hung on high speed shaft spindle nose, compact-sized, easy for installation.
(2) the radial labyrinth sealing at impeller back, reduces impeller back leakage rate, prevents high-temperature gas from entering magnetic suspension
Bearing causes overtemperature to damage bearing.
(3) radial labyrinth sealing simultaneously can reduce the axially mounted distance of air blower, improve critical rotor isolative interval
And operation stability.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is partial schematic diagram at present invention sealing air drain and radial labyrinth sealing.
Fig. 3 is motor rear end plate side cross-sectional structural schematic diagram.
Fig. 4 is motor rear end plate positive structure diagram.
Fig. 5 is that radial labyrinth seals side view cross section structure schematic diagram.
Fig. 6 is that radial labyrinth seals positive structure diagram.
Fig. 7 is impeller side structure schematic view.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution referring to FIG. 1-2: a kind of sealing structure of magnetic suspension air blower, including electricity
Machine end plate 1, high speed shaft spindle nose 2, impeller 3, impeller locknut 4, impeller pull bar 5, sealing air drain 6 and radial labyrinth sealing 7, motor
1 center of end plate is provided with circular hole, and high speed shaft spindle nose 2 is set in circular hole, and 3 one end of impeller is connected with high speed shaft spindle nose 2, leaf
It takes turns 3 other ends to be connected with 4 one end of impeller locknut, 5 one end end of impeller pull bar is set in high speed shaft spindle nose 2, and impeller pull bar 5 is set
It is placed in 4 inner hub location of impeller 3 and impeller locknut, impeller locknut 4 is connect with 5 spiral of impeller pull bar, and impeller 3 is close to high speed shaft
The end face of 2 one side of spindle nose is provided with several sealing air drains 6, and motor rear end plate 1 is equipped with radial labyrinth sealing 7 close to impeller 3 on one side,
Radial labyrinth sealing 7 uses flat helical teeth structure, and radial labyrinth sealing 7 is movably set in sealing air drain 6, and sealing air drain 6 is ring
Shape, the quantity for sealing air drain 6 is consistent with the quantity of annular projection 72, annular projection 72 be movably set in sealing air drain 6 it is interior and
It is not in contact with impeller 3.
As shown in Figure 3-4,1 surface of motor rear end plate is provided with impeller slot 11, and motor rear end plate 1 is located at 11 inside table of impeller slot
Face is provided with annular groove 12, and radial labyrinth sealing 7 is installed in annular groove 12.
As seen in figs. 5-6, radial labyrinth sealing 7 includes mounting plate 71 and annular projection 72, and mounting plate 71 is ring structure,
71 surface of mounting plate is evenly arranged with several annular projections 72.
As shown in fig. 7, impeller 3 includes impeller bodies 31 and blade 32, impeller bodies 31 are connected outside 2 one end of high speed shaft spindle nose
Side is movably set in impeller slot 11, if impeller bodies 31 are evenly arranged with far from connection 2 one end outer surface of high speed shaft spindle nose
Cured leaf piece 32.
A kind of sealing structure of magnetic suspension air blower, application method the following steps are included:
Step 1: radial labyrinth sealing 7 is fixedly mounted in the annular groove 12 of 1 inner surface of motor rear end plate, and will be electric
Machine end plate 1 is connected with motor housing and is tightened by screw installation, and high speed shaft spindle nose 2 is placed exactly in motor rear end plate 1 at this time
Circular hole in；
Step 2: 5 one end of impeller pull bar is connected with high speed shaft spindle nose 2；
Step 3: impeller 3 is first installed on 5 outside of impeller pull bar, then impeller locknut 4 is installed on 5 outside of impeller pull bar, by leaf
It takes turns locknut 4 to lock, impeller locknut 4 and impeller 3 are closely coupled, and the annular projection 72 of radial labyrinth sealing at this time 7 is just set to
It seals in air drain 6, and annular projection 72 is not in contact with impeller 3；
Step 4: driving, 2 impeller pull rod 5 of high speed shaft spindle nose rotation, so that impeller 3 rotates are opened.
Use principle: impeller 3 is provided with several sealing air drains 6, motor rear end plate 1 close to the end face of 2 one side of high speed shaft spindle nose
Radial labyrinth sealing 7 is installed on one side close to impeller 3, radial labyrinth sealing 7 uses flat helical teeth structure, and radial labyrinth sealing 7 is living
Dynamic to be set in sealing air drain 6, sealing air drain 6 is annular, and the quantity for sealing air drain 6 is consistent with the quantity of annular projection 72, ring
Shape protrusion 72 is movably set in sealing air drain 6 and is not in contact with impeller 3, when impeller 3 rotates, the high-temperature gas of generation
It is blocked by sealing air drain 6 and radial labyrinth sealing 7, prevents high-temperature gas from entering magnetic suspension bearing, cause overtemperature to damage bearing, together
When radial labyrinth sealing can reduce the axially mounted distance of air blower, improve critical rotor isolative interval and operation stability.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of sealing structure of magnetic suspension air blower, it is characterised in that: including motor rear end plate (1), high speed shaft spindle nose (2),
Impeller (3), impeller locknut (4), impeller pull bar (5), sealing air drain (6) and radial labyrinth sealing (7), the motor rear end plate
(1) center is provided with circular hole, and the high speed shaft spindle nose (2) is set in circular hole, described impeller (3) one end and high speed shaft spindle nose
(2) it is connected, impeller (3) other end is connected with impeller locknut (4) one end, and impeller pull bar (5) one end end is set to
In high speed shaft spindle nose (2), the impeller pull bar (5) is set to impeller (3) and impeller locknut (4) inner hub location, the leaf
Wheel locknut (4) is connect with impeller pull bar (5) spiral, and the impeller (3) is provided with several close to the end face of high speed shaft spindle nose (2) one side
It seals air drain (6), the motor rear end plate (1) is equipped with radial labyrinth sealing (7), the radial fan close to impeller (3) on one side
Palace seals (7) and uses flat helical teeth structure, and the radial labyrinth sealing (7) is movably set in sealing air drain (6).
2. a kind of sealing structure of magnetic suspension air blower according to claim 1, it is characterised in that: the motor rear end plate
(1) surface is provided with impeller slot (11), and the motor rear end plate (1) is located at impeller slot (11) inner surface and is provided with annular groove
(12), the radial labyrinth sealing (7) is installed in annular groove (12).
3. a kind of sealing structure of magnetic suspension air blower according to claim 1, it is characterised in that: the radial labyrinth is close
Envelope (7) includes mounting plate (71) and annular projection (72), and the mounting plate (71) is ring structure, mounting plate (71) surface
It is evenly arranged with several annular projections (72).
4. a kind of sealing structure of magnetic suspension air blower according to claim 1, it is characterised in that: the sealing air drain
It (6) is annular, the quantity of sealing air drain (6) is consistent with the quantity of annular projection (72), annular projection (72) activity
It is set in sealing air drain (6) and is not in contact with impeller (3).
5. a kind of sealing structure of magnetic suspension air blower according to claim 1, it is characterised in that: impeller (3) packet
Impeller bodies (31) and blade (32) are included, impeller bodies (31) connection is movably set on the outside of high speed shaft spindle nose (2) one end
In impeller slot (11), the impeller bodies (31) are evenly arranged with several far from connection high speed shaft spindle nose (2) one end outer surface
Blade (32).
6. a kind of sealing structure of magnetic suspension air blower according to claim 1, it is characterised in that: its application method includes
Following steps:
Step 1: radial labyrinth sealing (7) is fixedly mounted in the annular groove (12) of motor rear end plate (1) inner surface,
And motor rear end plate (1) is connected with motor housing and is tightened by screw installation, high speed shaft spindle nose (2) is placed exactly in electricity at this time
In the circular hole of machine end plate (1)；
Step 2: impeller pull bar (5) one end is connected with high speed shaft spindle nose (2)；
Step 3: first impeller (3) is installed on the outside of impeller pull bar (5), then impeller locknut (4) is installed on impeller pull bar (5)
Impeller locknut (4) are locked in outside, and impeller locknut (4) and impeller (3) are closely coupled, at this time the ring-type of radial labyrinth sealing (7)
Raised (72) are just set in sealing air drain (6), and annular projection (72) is not in contact with impeller (3)；
Step 4: driving, high speed shaft spindle nose (2) impeller pull rod (5) rotation, so that impeller (3) rotates are opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811294845.0A CN109281864B (en) | 2018-11-01 | 2018-11-01 | Sealing structure of magnetic suspension blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811294845.0A CN109281864B (en) | 2018-11-01 | 2018-11-01 | Sealing structure of magnetic suspension blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109281864A true CN109281864A (en) | 2019-01-29 |
| CN109281864B CN109281864B (en) | 2023-10-13 |
Family
ID=65174726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811294845.0A Active CN109281864B (en) | 2018-11-01 | 2018-11-01 | Sealing structure of magnetic suspension blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109281864B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594199A (en) * | 2020-12-01 | 2021-04-02 | 浙江上风高科专风实业股份有限公司 | Movement structure of high-speed magnetic suspension air blower and leakage-proof sealing design method |
| CN112648227A (en) * | 2020-12-24 | 2021-04-13 | 亿昇(天津)科技有限公司 | Impeller and electric motor rotor's seal structure and fan |
| KR20220060430A (en) * | 2020-11-04 | 2022-05-11 | (주)동일전자 | Showcase fan waterproof structure |
| WO2023273232A1 (en) * | 2021-07-02 | 2023-01-05 | 鑫磊压缩机股份有限公司 | Assembly accuracy self-correcting compressor |
| CN117967600A (en) * | 2024-04-01 | 2024-05-03 | 佛山市南海九洲普惠风机有限公司 | Novel magnetic suspension centrifugal fan impeller |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130139076A (en) * | 2012-06-12 | 2013-12-20 | 주식회사 삼정터빈 | Turbo blower |
| CN103696980A (en) * | 2013-12-12 | 2014-04-02 | 重庆江增船舶重工有限公司 | Air seal structure of centrifugal blower |
| CN203717391U (en) * | 2013-12-13 | 2014-07-16 | 湖北省风机厂有限公司 | Magnetic levitation high-speed tertiary flow centrifugal air blower |
| EP2784326A1 (en) * | 2013-03-25 | 2014-10-01 | Skf Magnetic Mechatronics | Compact turbomachine with magnetic bearings and auxiliary bearings |
| CN204591767U (en) * | 2015-05-04 | 2015-08-26 | 亿昇(天津)科技有限公司 | Magnetic suspension seal arrangement in a kind of magnetic-suspension high-speed blower |
| CN205779869U (en) * | 2016-05-06 | 2016-12-07 | 亿昇(天津)科技有限公司 | A kind of magnetic suspension blower fan sealing structure and there is this sealing structure |
| CN107906045A (en) * | 2017-12-15 | 2018-04-13 | 南通大通宝富风机有限公司 | A kind of monopole centrifugal blower rotor |
-
2018
- 2018-11-01 CN CN201811294845.0A patent/CN109281864B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130139076A (en) * | 2012-06-12 | 2013-12-20 | 주식회사 삼정터빈 | Turbo blower |
| EP2784326A1 (en) * | 2013-03-25 | 2014-10-01 | Skf Magnetic Mechatronics | Compact turbomachine with magnetic bearings and auxiliary bearings |
| CN103696980A (en) * | 2013-12-12 | 2014-04-02 | 重庆江增船舶重工有限公司 | Air seal structure of centrifugal blower |
| CN203717391U (en) * | 2013-12-13 | 2014-07-16 | 湖北省风机厂有限公司 | Magnetic levitation high-speed tertiary flow centrifugal air blower |
| CN204591767U (en) * | 2015-05-04 | 2015-08-26 | 亿昇(天津)科技有限公司 | Magnetic suspension seal arrangement in a kind of magnetic-suspension high-speed blower |
| CN205779869U (en) * | 2016-05-06 | 2016-12-07 | 亿昇(天津)科技有限公司 | A kind of magnetic suspension blower fan sealing structure and there is this sealing structure |
| CN107906045A (en) * | 2017-12-15 | 2018-04-13 | 南通大通宝富风机有限公司 | A kind of monopole centrifugal blower rotor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220060430A (en) * | 2020-11-04 | 2022-05-11 | (주)동일전자 | Showcase fan waterproof structure |
| KR102428081B1 (en) | 2020-11-04 | 2022-08-04 | (주)동일전자 | Showcase fan waterproof structure |
| CN112594199A (en) * | 2020-12-01 | 2021-04-02 | 浙江上风高科专风实业股份有限公司 | Movement structure of high-speed magnetic suspension air blower and leakage-proof sealing design method |
| CN112648227A (en) * | 2020-12-24 | 2021-04-13 | 亿昇(天津)科技有限公司 | Impeller and electric motor rotor's seal structure and fan |
| WO2023273232A1 (en) * | 2021-07-02 | 2023-01-05 | 鑫磊压缩机股份有限公司 | Assembly accuracy self-correcting compressor |
| CN117967600A (en) * | 2024-04-01 | 2024-05-03 | 佛山市南海九洲普惠风机有限公司 | Novel magnetic suspension centrifugal fan impeller |
| CN117967600B (en) * | 2024-04-01 | 2024-05-28 | 佛山市南海九洲普惠风机有限公司 | Magnetic suspension centrifugal fan impeller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109281864B (en) | 2023-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109281864A (en) | A kind of sealing structure of magnetic suspension air blower | |
| CN209100333U (en) | A kind of sealing structure of magnetic suspension air blower | |
| CN201893627U (en) | Rotary motor unit, power generator unit, wind power generation system, rotary motor and power generator | |
| CN207848024U (en) | Seperated molding mixed flow turbine | |
| CN213574637U (en) | Permanent magnet motor driven axial flow water pump | |
| CN208638182U (en) | A kind of Split-type rotor axis and the motor using the armature spindle | |
| CN106907288A (en) | The symmetrical direct-drive type ocean current generator group of big L/D ratio | |
| CN214626631U (en) | Internal heat radiation structure of micro turbine generator | |
| CN203130361U (en) | Mechanism preventing blade from icing in wind generating set | |
| CN208474137U (en) | Impeller built-in bearing formula one high-speed permanent magnetic centrifugal pump of single stage type | |
| CN213585378U (en) | Embedded permanent magnet synchronous variable pitch motor for wind power generation | |
| CN209057033U (en) | A kind of generator amature axle construction | |
| CN108278221A (en) | Inlet seal structure and wind turbine | |
| CN208474138U (en) | Guide vane bearing formula one high-speed permanent magnetic centrifugal pump | |
| CN208939693U (en) | A kind of outer rotor brushless motor | |
| CN208073832U (en) | A kind of double air intake centrifugal wind turbines using axial direction electric machine | |
| CN209261732U (en) | A kind of wind-driven generator using split type external stator shell | |
| CN208424163U (en) | A kind of outer rotor brushless motor | |
| CN208474135U (en) | Impeller built-in bearing formula one high-speed permanent magnetic centrifugal pump | |
| CN208431199U (en) | A kind of low noise motor structure | |
| CN221633568U (en) | Yaw motor with reversely fixed bolts | |
| CN207442639U (en) | A kind of ultra-high efficient motor for possessing superior heat radiation performance | |
| KR20110136262A (en) | Wind-acceleration device for windmill | |
| CN208474139U (en) | Guide vane bearing formula one high-speed permanent magnetic centrifugal pump of single stage type | |
| CN218416095U (en) | External rotor permanent magnet frequency conversion centrifugal fan with novel structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |