CN107956749B - Axial support mounting structure of magnetic suspension centrifugal blower - Google Patents
Axial support mounting structure of magnetic suspension centrifugal blower Download PDFInfo
- Publication number
- CN107956749B CN107956749B CN201711261181.3A CN201711261181A CN107956749B CN 107956749 B CN107956749 B CN 107956749B CN 201711261181 A CN201711261181 A CN 201711261181A CN 107956749 B CN107956749 B CN 107956749B
- Authority
- CN
- China
- Prior art keywords
- axial
- magnetic bearing
- mounting
- rotor
- detection
- 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
- 239000000725 suspension Substances 0.000 title claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 58
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 238000005339 levitation Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/626—Mounting or removal of fans
-
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
- F04D29/054—Arrangements for joining or assembling shafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an axial bracket mounting structure of a magnetic suspension centrifugal blower, wherein a stator and a magnetic bearing seat are respectively and correspondingly fixed on a machine shell, a magnetic bearing is arranged in the magnetic bearing seat, a rotor is supported in the stator and the magnetic bearing, and a diffuser is fixedly connected with the machine shell; the sensor support is sleeved on the rotor, the sensor support is fixedly connected with the magnetic bearing, the front shaft sleeve, the rear shaft sleeve and the detection disc are sleeved on the rotor, an axial displacement detection gap is arranged between the right end face of the detection disc and the inner end face of the sensor support, the axial displacement detection gap is arranged outside the casing, a detection opening is arranged on the sensor support, the detection opening is communicated with the axial displacement detection gap, and the impeller is fixedly connected on the rotor. The axial gap adjusting device solves the problem that the axial sensor is not easy to detect and adjust the axial gap, and solves the problem that the axial sensor is not easy to detach.
Description
Technical field:
the invention relates to an axial bracket mounting structure of a magnetic suspension centrifugal blower.
The background technology is as follows:
the sensor support 1 in the existing magnetic suspension centrifugal blower is installed inside the machine shell, the axial sensor of the blower is installed on the sensor support 1, parts such as the detection disc 2, the positioning shaft sleeve 3, the front shaft sleeve 61, the rear shaft sleeve 62 and the sealing shaft sleeve 7 are all installed on the left side of the axial sensor (as shown in fig. 1), the parts are more, the processing is not facilitated, each part is processed with a tolerance range, and a plurality of parts are combined together, so that accumulated errors of axial gaps are easily caused.
In addition, the axial sensor is arranged on the sensor bracket 1, the sensor bracket 1 is arranged on the magnetic bearing 5, and the magnetic bearing 5 is directly assembled with the shell in an interference way, so that the sensor bracket 1 can be detached from the magnetic bearing 5 only by a screwdriver when the axial sensor is to be detached, a plurality of sensor wires are arranged on the sensor, and the detachment is very inconvenient; when detecting axial clearance in the assembly process, will detect the dish 2 and install in place, because at the casing inside, inconvenient clearance gauge operation, operating personnel adjusts repeatedly and will reduce assembly efficiency. If the axial clearance is not correct in the running process of the fan, all parts on the left side of the magnetic bearing 5 need to be removed, including a volute, an air inlet channel and the like, and after the detection disc 2 and the positioning shaft sleeve 3 are taken out, the axial clearance can be adjusted only by turning the axial length of the positioning shaft sleeve, and if the assembly and the disassembly are repeatedly carried out, a lot of time can be wasted, and the workload is huge.
The invention comprises the following steps:
the invention provides an axial bracket mounting structure of a magnetic suspension centrifugal blower for solving the problems in the prior art.
The invention adopts the technical scheme that: the axial support mounting structure of the magnetic suspension centrifugal blower comprises a shell, a stator, a rotor, a magnetic bearing seat, a magnetic bearing, a front shaft sleeve, a rear shaft sleeve, a sensor support, a detection disc, an impeller and a diffuser, wherein an axial displacement sensor is arranged on the sensor support, a stator mounting cavity and a magnetic bearing mounting cavity are arranged in the shell, the stator and the magnetic bearing seat are respectively and correspondingly fixed in the stator mounting cavity and the magnetic bearing mounting cavity, the magnetic bearing is arranged in the magnetic bearing seat, the rotor is supported in the stator and the magnetic bearing, one end of the rotor penetrates through the diffuser and extends out of the shell, and the diffuser is fixedly connected with the shell;
the sensor support is sleeved on the rotor, the sensor support is fixedly connected with the magnetic bearing, the front shaft sleeve, the rear shaft sleeve and the detection disc are sleeved on the rotor, the rear shaft sleeve and the front shaft sleeve are positioned on the left side and the right side of the detection disc, an axial displacement detection gap is arranged between the right end face of the detection disc and the inner end face of the sensor support, the axial displacement detection gap is arranged outside the casing, a detection opening is formed in the sensor support and communicated with the axial displacement detection gap, the impeller is fixedly connected on the rotor, and the front shaft sleeve, the rear shaft sleeve and the detection disc are axially positioned on the rotor.
Further, the sensor support comprises an annular body, the inner circumferential wall of the body protrudes rightward to form a boss portion, a mounting waist-shaped table with an arc edge and a straight edge is arranged on the right end face of the boss portion, and a detection opening is formed between the straight edge of the mounting waist-shaped table and the inner circumferential wall of the boss portion.
Further, an axial hole and a sensor mounting hole are arranged in the axial direction of the mounting kidney-shaped table, and the axial hole is positioned at the center of the mounting kidney-shaped table.
Further, a plurality of mounting holes are formed in the axial direction of the body.
Further, a circular protruding part is arranged at the center of the left end face of the mounting kidney-shaped table, and the shaft hole and the sensor mounting hole penetrate through the circular protruding part; an axial displacement detection gap is formed between the circular protruding part and the right end face of the detection disc.
Further, the depth of the detection port in the axial direction of the body is larger than the axial thickness of the circular protruding portion.
Further, a positioning shaft shoulder is arranged on the magnetic bearing seat, and a positioning groove matched with the positioning shaft shoulder is arranged on the inner wall of the magnetic bearing mounting cavity.
The invention has the following beneficial effects:
1) The axial displacement sensor is characterized in that the axial displacement sensor is arranged on the sensor support, and the axial displacement sensor is arranged on the sensor support;
2) In the running process of the machine, after the axial clearance is deviated, only a small amount of external parts (a diffuser, an impeller and the like) are detached, and then the gasket of the sensor bracket is adjusted, so that machining errors caused by excessive parts are avoided;
3) The sensor bracket is assembled after the internal parts are completely assembled, so that the assembly and the disassembly are very convenient;
4) When the axial distance needs to be adjusted, a gasket is directly added between the mounting hole of the bracket and the magnetic bearing to achieve proper distance, and the axial displacement of the rotor sealing ring can not be generated.
Description of the drawings:
fig. 1 is a mounting structure view of an axial bracket in the prior art.
Fig. 2 is a view showing an installation structure of an axial bracket according to the present invention.
FIG. 3 is an exploded view of the present invention.
Fig. 4 is an enlarged view of a portion of the present invention.
Fig. 5 to 7 are structural views of a sensor holder according to the present invention.
The specific embodiment is as follows:
the invention is further described below with reference to the accompanying drawings.
As shown in fig. 2 to 7, the invention discloses an axial bracket mounting structure of a magnetic suspension centrifugal blower, which comprises a casing 100, a stator 200, a rotor 300, a magnetic bearing seat 4, a magnetic bearing 5, a front shaft sleeve 61, a rear shaft sleeve 62, a sensor bracket 1, a detection disc 2, an impeller 8 and a diffuser 9, wherein an axial displacement sensor is arranged on the sensor bracket 1, a stator mounting cavity 101 and a magnetic bearing mounting cavity 102 are arranged in the casing 100, the stator 200 and the magnetic bearing seat 4 are correspondingly fixed in the stator mounting cavity 101 and the magnetic bearing mounting cavity 102 respectively, the magnetic bearing 5 is arranged in the magnetic bearing seat 4, and the magnetic bearing 5 and the magnetic bearing seat 4 are in interference fit. The rotor 300 is supported in the stator 200 and the magnetic bearing 5, and one end of the rotor 300 passes through the diffuser 9 and extends out of the casing 100, and the diffuser 9 is fixedly connected with the casing 100 by a screw.
The sensor support 1 is sleeved on the rotor 300, the sensor support 1 is fixedly connected with the magnetic bearing 5, the front shaft sleeve 61, the rear shaft sleeve 62 and the detection disc 2 are sleeved on the rotor 300, and the front shaft sleeve, the rear shaft sleeve, the detection disc 2 and the rotor 300 are in transition fit. The rear shaft sleeve 62 and the front shaft sleeve 61 are positioned at the left side and the right side of the detection disc 2, an axial displacement detection gap 400 is arranged between the right end face of the detection disc 2 and the inner end face of the sensor support 1, the axial displacement detection gap 400 is arranged outside the casing 100, the sensor support 1 is provided with a detection port 10, the detection port 10 is communicated with the axial displacement detection gap 400, the impeller 8 is fixedly connected to the rotor 300, and the impeller 8 axially positions the front shaft sleeve, the rear shaft sleeve and the detection disc 2 on the rotor 300.
The sensor bracket 1 in the invention comprises an annular body 11, the inner circumferential wall of the body 11 protrudes rightward to form a boss part 12, a mounting waist-shaped table 13 with a circular arc edge and a straight edge is arranged on the right end surface of the boss part 12, and a detection opening 10 is formed between the straight edge of the mounting waist-shaped table 13 and the inner circumferential wall of the boss part 12.
An axial hole 131 and a sensor mounting hole 132 are provided in the axial direction of the mounting kidney-shaped stage 13, the axial hole 131 being located at the center of the mounting kidney-shaped stage 13. A plurality of mounting holes 110 are provided in the axial direction of the body 11.
A circular boss 133 is provided at the center of the left end surface of the mounting kidney-shaped stage 13, and the shaft hole 131 and the sensor mounting hole 132 penetrate through the circular boss 133; an axial displacement detection gap 400 is formed between the end face of the circular boss 133 and the right end face of the detection disk 2.
To prevent the circular boss 133 from interfering with the feeler gauge, the depth of the detection port 10 in the axial direction of the body 11 is greater than the axial thickness of the circular boss 133.
The magnetic bearing seat 4 is provided with a positioning shaft shoulder 41, and the inner wall of the magnetic bearing mounting cavity 102 is provided with a positioning groove matched with the positioning shaft shoulder 41. The positioning shaft shoulder 41 is matched with the positioning groove, so that good positioning connection effect is ensured.
According to the invention, the axial displacement detection gap 400 between the detection disc 2 and the sensor support 1 is protruded outside the casing 100, and the detection opening 10 is arranged on the sensor support 1, so that when the axial displacement detection gap is used, the clearance is easily detected by using the feeler gauge 500 (as shown in fig. 4), if the clearance does not meet the requirement, only a gasket is required to be added at the joint (a position in fig. 4) of the mounting hole 110 of the body 11, and after the detection disc 2 in the original structure is not required to be dismounted, the detection surface is turned to meet the requirement of the axial clearance, so that the sealing ring on the rotor cannot be axially displaced.
Compared with the detection disc placed inside, the invention has the advantages of convenient adjustment and replacement of the installation structure, simple structure, low processing difficulty of the milling machine and less time. When the machine normally operates, the axial distance is found to be adjusted, the axial gap can be conveniently adjusted by only taking out the diffuser and the impeller and adding or reducing the gasket at the middle position of the sensor bracket 1 and the magnetic bearing 5, and the detection disc and the positioning shaft sleeve are not required to be taken out for turning, so that the error size is reduced, and the disassembly is convenient.
The foregoing is merely a preferred embodiment of the invention, and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the invention, which modifications would also be considered to be within the scope of the invention.
Claims (3)
1. The utility model provides an axial support mounting structure of magnetic suspension centrifugal blower, includes casing (100), stator (200), rotor (300), magnetic bearing seat (4), magnetic bearing (5), preceding axle sleeve (61), back axle sleeve (62), sensor support (1), detects dish (2), impeller (8) and diffuser (9), is equipped with axial displacement sensor, its characterized in that on sensor support (1): a stator mounting cavity (101) and a magnetic bearing mounting cavity (102) are arranged in the casing (100), the stator (200) and the magnetic bearing seat (4) are respectively and correspondingly fixed in the stator mounting cavity (101) and the magnetic bearing mounting cavity (102), the magnetic bearing (5) is arranged in the magnetic bearing seat (4), the rotor (300) is supported in the stator (200) and the magnetic bearing (5), and one end of the rotor (300) penetrates through the diffuser (9) and extends out of the casing (100), and the diffuser (9) is fixedly connected with the casing (100);
the sensor support (1) is sleeved on the rotor (300), the sensor support (1) is fixedly connected with the magnetic bearing (5), the front shaft sleeve (61), the rear shaft sleeve (62) and the detection disc (2) are sleeved on the rotor (300), the rear shaft sleeve (62) and the front shaft sleeve (61) are positioned on the left side and the right side of the detection disc (2), an axial displacement detection gap (400) is arranged between the right end surface of the detection disc (2) and the inner end surface of the sensor support (1), the axial displacement detection gap (400) is arranged outside the casing (100), a detection opening (10) is arranged on the sensor support (1), the detection opening (10) is communicated with the axial displacement detection gap (400), the impeller (8) is fixedly connected on the rotor (300), and the impeller (8) axially positions the front shaft sleeve, the rear shaft sleeve and the detection disc (2) on the rotor (300);
the sensor bracket (1) comprises an annular body (11), wherein the inner circumferential wall of the body (11) protrudes rightward to form a boss part (12), a mounting waist-shaped table (13) with an arc edge and a straight edge is arranged on the right end surface of the boss part (12), and a detection port (10) is formed between the straight edge of the mounting waist-shaped table (13) and the inner circumferential wall of the boss part (12);
an axial direction of the mounting waist-shaped table (13) is provided with an axial hole (131) and a sensor mounting hole (132), and the axial hole (131) is positioned at the center of the mounting waist-shaped table (13);
a circular protruding part (133) is arranged at the center of the left end surface of the mounting waist-shaped table (13), and a shaft hole (131) and a sensor mounting hole (132) penetrate through the circular protruding part (133); an axial displacement detection gap (400) is formed between the circular protruding part (133) and the right end surface of the detection disc (2);
the depth of the detection port (10) in the axial direction of the body (11) is larger than the axial thickness of the circular boss (133).
2. An axial bracket mounting structure for a magnetic levitation centrifugal blower as defined in claim 1, wherein: a plurality of mounting holes (110) are formed in the axial direction of the body (11).
3. An axial bracket mounting structure for a magnetic levitation centrifugal blower as defined in claim 1, wherein: the magnetic bearing seat (4) is provided with a positioning shaft shoulder (41), and the inner wall of the magnetic bearing mounting cavity (102) is provided with a positioning groove matched with the positioning shaft shoulder (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711261181.3A CN107956749B (en) | 2017-12-04 | 2017-12-04 | Axial support mounting structure of magnetic suspension centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711261181.3A CN107956749B (en) | 2017-12-04 | 2017-12-04 | Axial support mounting structure of magnetic suspension centrifugal blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107956749A CN107956749A (en) | 2018-04-24 |
| CN107956749B true CN107956749B (en) | 2023-11-17 |
Family
ID=61963122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711261181.3A Active CN107956749B (en) | 2017-12-04 | 2017-12-04 | Axial support mounting structure of magnetic suspension centrifugal blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107956749B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111486112A (en) * | 2019-01-29 | 2020-08-04 | 青岛海尔智能技术研发有限公司 | Magnetic suspension centrifugal compressor and air conditioning system |
| CN211230872U (en) * | 2019-12-11 | 2020-08-11 | 南京磁谷科技有限公司 | Structure for adjusting clearance by utilizing axial sensor of air compressor |
| CN113669273A (en) * | 2021-08-11 | 2021-11-19 | 鑫磊压缩机股份有限公司 | Magnetic suspension centrifuge air-blower |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200996828Y (en) * | 2006-12-27 | 2007-12-26 | 上海汽轮机有限公司 | Super-long depth measuring equipment |
| JP2008082425A (en) * | 2006-09-27 | 2008-04-10 | Ntn Corp | Magnetic bearing device |
| JP2009243635A (en) * | 2008-03-31 | 2009-10-22 | Kawasaki Heavy Ind Ltd | Magnetic bearing device |
| CN103486230A (en) * | 2013-09-27 | 2014-01-01 | 南京磁谷科技有限公司 | Mechanism for fine adjustment of axial clearance |
| CN104101372A (en) * | 2013-04-12 | 2014-10-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic-suspension bearing device and sensor fixation support thereof |
| CN104539096A (en) * | 2014-12-31 | 2015-04-22 | 天津美湖机电科技有限公司 | Magnetic suspension high-speed motor |
| JP2016121729A (en) * | 2014-12-24 | 2016-07-07 | Ntn株式会社 | Wheel bearing device with rotational speed detection device |
| CN106321496A (en) * | 2016-11-04 | 2017-01-11 | 珠海格力节能环保制冷技术研究中心有限公司 | High-speed magnetic suspension rotor type axial detection device and centrifugal compressor |
| JP2017203521A (en) * | 2016-05-12 | 2017-11-16 | 三菱電機株式会社 | Magnetic bearing device and blower |
| CN207568946U (en) * | 2017-12-04 | 2018-07-03 | 南京磁谷科技有限公司 | A kind of axial rack mounting structure of magnetic suspension cfentrifugal blower |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3919436B2 (en) * | 2000-09-13 | 2007-05-23 | 株式会社荏原製作所 | Magnetic levitation rotating machine |
-
2017
- 2017-12-04 CN CN201711261181.3A patent/CN107956749B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008082425A (en) * | 2006-09-27 | 2008-04-10 | Ntn Corp | Magnetic bearing device |
| CN200996828Y (en) * | 2006-12-27 | 2007-12-26 | 上海汽轮机有限公司 | Super-long depth measuring equipment |
| JP2009243635A (en) * | 2008-03-31 | 2009-10-22 | Kawasaki Heavy Ind Ltd | Magnetic bearing device |
| CN104101372A (en) * | 2013-04-12 | 2014-10-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic-suspension bearing device and sensor fixation support thereof |
| CN103486230A (en) * | 2013-09-27 | 2014-01-01 | 南京磁谷科技有限公司 | Mechanism for fine adjustment of axial clearance |
| JP2016121729A (en) * | 2014-12-24 | 2016-07-07 | Ntn株式会社 | Wheel bearing device with rotational speed detection device |
| CN104539096A (en) * | 2014-12-31 | 2015-04-22 | 天津美湖机电科技有限公司 | Magnetic suspension high-speed motor |
| JP2017203521A (en) * | 2016-05-12 | 2017-11-16 | 三菱電機株式会社 | Magnetic bearing device and blower |
| CN106321496A (en) * | 2016-11-04 | 2017-01-11 | 珠海格力节能环保制冷技术研究中心有限公司 | High-speed magnetic suspension rotor type axial detection device and centrifugal compressor |
| CN207568946U (en) * | 2017-12-04 | 2018-07-03 | 南京磁谷科技有限公司 | A kind of axial rack mounting structure of magnetic suspension cfentrifugal blower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107956749A (en) | 2018-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107956749B (en) | Axial support mounting structure of magnetic suspension centrifugal blower | |
| CN107939699B (en) | Magnetic suspension compressor structure | |
| CN107742995B (en) | Mounting structure of axial detection piece of magnetic suspension motor rotor | |
| CN103498811A (en) | Impeller with angle-adjustable blades | |
| WO2015143853A1 (en) | Direct-current brushless outer rotor motor and air blower applying same | |
| CN113107866B (en) | Vacuum pump capable of adjusting wheel back air pressure | |
| CN201650763U (en) | Single-level shielding pump with front-mounted balancing plate | |
| CN207568946U (en) | A kind of axial rack mounting structure of magnetic suspension cfentrifugal blower | |
| CN110094347B (en) | Thin fan | |
| CN211924500U (en) | Centrifugal fan | |
| DE69914785D1 (en) | PUMP FOR PAPER-FREE | |
| DE69919708D1 (en) | PUMP FOR PAPER-FREE | |
| CN208138189U (en) | Improve the peripheral pump of impeller assembly method | |
| CN211174782U (en) | Adjustable diffuser of centrifugal machine | |
| CN201723451U (en) | Single-stage single-suction cantilever type chemical solution centrifugal pump | |
| CN211546885U (en) | Novel connecting seat of integrated sewing machine | |
| CN219317073U (en) | Pump body structure of fuel pump | |
| CN214221602U (en) | Novel guide-wing axial flow impeller special for industrial furnace | |
| CN221322759U (en) | Axial flow fan with adjustable blade position | |
| CN221390394U (en) | Vibration polishing machine with dustproof function | |
| CN110567411A (en) | A independently reassembling type inflation detection mechanism for main shaft | |
| CN203476798U (en) | Impeller with adjustable vane angle | |
| CN201786713U (en) | Mechanism for adjusting clearance between impeller and wear-resisting plate in dredge self-priming pump | |
| CN220762177U (en) | Polishing machine with self-suction fan blade convenient to disassemble and assemble | |
| CN214221592U (en) | AI cantilever air-blower axial force balance seal device |
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 | ||
| CP03 | Change of name, title or address |
Address after: No.99 Jinxin Middle Road, Jiangning District, Nanjing City, Jiangsu Province (Jiangning Development Zone) Patentee after: Nanjing Cigu Technology Co.,Ltd. Address before: 211102 No. 100 Jiuzhu Road, Jiangning Development Zone, Nanjing, Jiangsu Province Patentee before: NANJING CIGU Ltd.,Corp. |
|
| CP03 | Change of name, title or address |