CN114542484A - Centrifugal fan with prevent reversing but limit structure - Google Patents
Centrifugal fan with prevent reversing but limit structure Download PDFInfo
- Publication number
- CN114542484A CN114542484A CN202210139838.3A CN202210139838A CN114542484A CN 114542484 A CN114542484 A CN 114542484A CN 202210139838 A CN202210139838 A CN 202210139838A CN 114542484 A CN114542484 A CN 114542484A
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- centrifugal fan
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- limitable
- reverse
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 241001075561 Fioria Species 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000005381 potential energy Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
-
- 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
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of centrifugal fans, in particular to a centrifugal fan with an anti-reverse-rotation limitable structure, which comprises a base, wherein a motor is arranged at the position, close to one side, of the top end of the base, the output end of the motor is in transmission connection with a rotating shaft, a ratchet wheel is fixedly sleeved on the outer surface of the rotating shaft, four groups of mounting blocks are arranged at the position, close to one side of the ratchet wheel, of the outer surface of the rotating shaft, arc-shaped blocks are arranged at one ends of the four groups of mounting blocks, a centrifugal fan is arranged at one end of the rotating shaft, two groups of mounting plates are arranged at the position, close to the other side, of the top end of the base, penetrating grooves are formed in the inner walls of the top ends of the two groups of mounting plates, movable grooves are formed in the inner side surfaces of the two groups of mounting plates, and springs are arranged at the positions, close to the two sides, of the top ends of the two groups of the mounting plates. Can effectively solve the use and make mistakes inevitably through spare parts such as ratchet, movable rod, extension board and non return pawl and set up the effect down to can lead to the fan leaf in the fan to appear reversing, finally lead to centrifugal fan's damage, increase use cost's problem.
Description
Technical Field
The invention relates to the technical field of centrifugal fans, in particular to a centrifugal fan with an anti-reverse rotation limiting structure.
Background
With the advance of the industrialization process in China, a centrifugal fan is taken as important industrial matching equipment and is more applied to the fields of electric power, cement, petrochemical industry, coal, mines, environmental protection and the like, the centrifugal fan accelerates gas by utilizing an impeller rotating at a high speed according to the principle that kinetic energy is converted into potential energy, and then decelerates and changes the flow direction to convert the kinetic energy into the potential energy, but the existing centrifugal fan has a plurality of problems and needs to be further improved.
The existing centrifugal fan has the problems that errors are difficult to avoid in the use process, so that fan blades in the fan are inverted, the centrifugal fan is damaged, the use cost is increased, and inconvenience is brought to actual operation; the invention provides a centrifugal fan with an anti-reversion limitable structure, which is used for solving the problems that the normal use of the centrifugal fan is influenced because a rotating shaft is easy to shake when rotating in the use process of the existing centrifugal fan, and the inconvenience is brought to the actual operation.
Disclosure of Invention
The invention aims to provide a centrifugal fan with an anti-reverse rotation limitable structure, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a centrifugal fan with an anti-reverse rotation limitable structure comprises a base, wherein a motor is installed at the top end of the base by the position of one side, a rotating shaft is connected with the output end of the motor in a transmission manner, a ratchet wheel is fixedly sleeved on the outer surface of the rotating shaft, four groups of installation blocks are installed at the outer surface of the rotating shaft by the position of one side of the ratchet wheel, arc-shaped blocks are all installed at one ends of the four groups of installation blocks, a centrifugal fan is installed at one end of the rotating shaft, two groups of installation plates are installed at the top end of the base by the position of the other side, through grooves are all formed in the inner wall of the top end of the two groups of installation plates, movable grooves are all formed in the inner side surfaces of the two groups of installation plates, springs are installed at the positions of the top ends of the two groups of installation plates by the two sides, movable rods are all movably installed in the inner parts of the two groups of installation plates, a top plate is installed at the top end of the two groups of movable rods, and connecting rods are all installed at the positions of the outer surfaces of the two groups of movable rods by the two sides, four groups the pulley is all installed to the one end of connecting rod, and is two sets of the extension board is all installed by the position of opposite side to the surface of movable rod, and is two sets of the non return pawl is all installed to the one end of extension board, and is two sets of the rubber column is all installed to the bottom of movable rod, and is two sets of the connecting plate is all installed to the inboard of mounting panel, and is two sets of the corresponding one end of connecting plate is fixed mutually with the surface corresponding position of spacing ring respectively, the ring channel has been seted up to the inner wall of spacing ring, the bracing piece is installed by the position of bottom to the surface of spacing ring.
Preferably, the number of the springs is four, the four groups of springs are equal in size, and the corresponding ends of the four groups of springs are respectively fixed with the corresponding positions of the bottom ends of the corresponding top plates.
Preferably, the two groups of movable rods are equal in size, and one ends of the two groups of movable rods respectively penetrate through the inner wall of the top end of the corresponding mounting plate through the corresponding penetrating grooves.
Preferably, the four groups of pulleys are equal in size, and the outer surfaces of the four groups of pulleys are respectively attached to the inner wall of the corresponding side of the corresponding mounting plate.
Preferably, the two sets of extension plates are equal in size, and the two sets of extension plates respectively penetrate through the inner wall of the corresponding side of the corresponding mounting plate through the corresponding movable grooves.
Preferably, the four groups of arc-shaped blocks are equal in size, are arranged in central symmetry by taking the central point of the motor as a central point, and are positioned in the annular groove.
Preferably, the supporting rod is cylindrical, and the bottom end of the supporting rod is fixed to the top end of the base at a position corresponding to the top end of the base.
Preferably, the two groups of check pawls are equal in size, and the two groups of check pawls and the ratchet wheel are arranged at the same horizontal height.
Compared with the prior art, the invention has the beneficial effects that:
1. can effectively solve the use and make mistakes inevitably through spare parts such as ratchet, movable rod, extension board and non return pawl and set up the effect down to can lead to the fan leaf in the fan to appear reversing, finally lead to centrifugal fan's damage, increase use cost's problem.
2. Through the setting of spare parts such as installation piece, arc piece, connecting plate, spacing ring, ring channel and bracing piece can effectual solution use, produce easily when the pivot rotates and rock to influence centrifugal fan normal use's problem.
Drawings
FIG. 1 is a schematic perspective view of the main body of the present invention;
FIG. 2 is an enlarged view of the point A in FIG. 1;
FIG. 3 is a schematic view of the interior of the structure of the mounting plate of the present invention;
FIG. 4 is a schematic view of the interior of the stop collar of the present invention;
FIG. 5 is a schematic side sectional view of the structure of the mounting plate of the present invention.
In the figure: 1. a base; 2. a motor; 21. a rotating shaft; 22. a ratchet wheel; 23. mounting blocks; 24. an arc-shaped block; 25. a centrifugal fan; 3. mounting a plate; 31. a through groove; 32. a movable groove; 33. a spring; 4. a movable rod; 41. mounting a plate; 42. a connecting rod; 43. a pulley; 44. an extension plate; 45. a non-return pawl; 46. a rubber column; 5. a connecting plate; 51. a limiting ring; 52. an annular groove; 53. a support rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, the present invention provides a technical solution: a centrifugal fan with an anti-reverse rotation limiting structure comprises a base 1, wherein a motor 2 is installed at the top end of the base 1 close to one side, a rotating shaft 21 is connected to the output end of the motor 2 in a transmission mode, a ratchet wheel 22 is fixedly sleeved on the outer surface of the rotating shaft 21, four groups of installation blocks 23 are installed at the outer surface of the rotating shaft 21 close to one side of the ratchet wheel 22, arc blocks 24 are installed at one ends of the four groups of installation blocks 23, the four groups of arc blocks 24 are equal in size, the four groups of arc blocks 24 are arranged in a central symmetry mode by taking the center point of the motor 2 as the center point, the four groups of arc blocks 24 are located inside an annular groove 52, and a centrifugal fan 25 is installed at one end of the rotating shaft 21;
two groups of mounting plates 3 are mounted at the positions, close to the other side, of the top end of the base 1, penetrating grooves 31 are formed in the inner walls of the top ends of the two groups of mounting plates 3, movable grooves 32 are formed in the inner side surfaces of the two groups of mounting plates 3, springs 33 are mounted at the positions, close to the two sides, of the top ends of the two groups of mounting plates 3, the number of the springs 33 is four, the sizes of the four groups of springs 33 are equal, and the corresponding ends of the four groups of springs 33 are respectively fixed with the corresponding positions of the bottom ends of the corresponding top plates 41;
the movable rods 4 are movably arranged in the two groups of mounting plates 3, the sizes of the two groups of movable rods 4 are equal, one ends of the two groups of movable rods 4 respectively penetrate through the inner walls of the top ends of the corresponding mounting plates 3 through the corresponding penetrating grooves 31, the top ends of the two groups of movable rods 4 are respectively provided with a top plate 41, the outer surfaces of the two groups of movable rods 4 are respectively provided with connecting rods 42 at positions close to two sides, one ends of the four groups of connecting rods 42 are respectively provided with pulleys 43, the sizes of the four groups of pulleys 43 are equal, the outer surfaces of the four groups of pulleys 43 are respectively attached to the inner walls of the corresponding side of the corresponding mounting plates 3, the outer surfaces of the two groups of movable rods 4 are respectively provided with extending plates 44 at positions close to the other side, the sizes of the two groups of extending plates 44 are equal, the two groups of extending plates 44 respectively penetrate through the inner walls of the corresponding side of the corresponding mounting plates 3 through the corresponding movable grooves 32, and one ends of the two groups of extending plates 44 are respectively provided with non-return pawls 45, the bottom ends of the two groups of movable rods 4 are respectively provided with a rubber column 46, the two groups of non-return pawls 45 have the same size, and the two groups of non-return pawls 45 and the ratchet wheel 22 are arranged at the same horizontal height;
the inner sides of the two groups of mounting plates 3 are respectively provided with a connecting plate 5, the corresponding ends of the two groups of connecting plates 5 are respectively fixed with the corresponding positions of the outer surface of the limiting ring 51, the inner wall of the limiting ring 51 is provided with an annular groove 52, the outer surface of the limiting ring 51 close to the bottom end is provided with a supporting rod 53, the supporting rod 53 is cylindrical, and the bottom end of the supporting rod 53 is fixed with the corresponding position of the top end of the base 1;
in the using process, a user can start the motor 2, the rotating shaft 21 is rotated under the action of the motor 2, so that the centrifugal fan 25 can rotate therewith, the centrifugal fan 25 can be normally used, when the rotating shaft 21 rotates, the ratchet wheel 22 correspondingly rotates therewith, so that the two sets of non-return pawls 45 correspondingly descend and then are lifted upwards, the corresponding extending plates 44 correspondingly move up and down in the corresponding movable grooves 32, the corresponding movable rods 4 correspondingly move therewith in the process, the two sets of pulleys 43 are driven to correspondingly slide on the inner walls of the corresponding sides of the corresponding mounting plates 3, the corresponding rubber columns 46 correspondingly contract downwards or extend upwards, and the two sets of springs 33 correspondingly contract downwards or extend upwards, therefore, the corresponding movable rods 4 can perform stable up-and-down repeated movement in the corresponding mounting plate 3, when the two groups of movable rods 4 perform up-and-down repeated movement, the rotating shaft 21 can be judged to be in normal operation, when the rotating shaft 21 rotates reversely due to faults, the ratchet wheel 22 also rotates reversely, at the moment, the ratchet wheel 22 is clamped by the two groups of non-return pawls 45, the rotating shaft 21 cannot rotate, the motor 2 cannot rotate, and the effect of preventing the rotating shaft 21 from rotating is achieved, meanwhile, the two groups of movable rods 4 cannot perform up-and-down repeated movement normally, at the moment, a user can judge that the motor 2 fails, and corresponding maintenance can be performed;
when pivot 21 normal operating, four group's arc pieces 24 can rotate thereupon and carry out corresponding laminating rotation at one side inner wall of ring channel 52, thereby through four group's arc pieces 24, connecting plate 5 and stop collar 51's setting can effectually carry out limiting displacement to pivot 21, thereby make pivot 21 rotate time more stable and difficult emergence shake, and then make centrifugal fan 25 more stable and difficult emergence shake in the use, can effectually support stop collar 51 through setting up of two sets of connecting plates 5 and bracing piece 53, thereby make stop collar 51 can be more stable set up on pivot 21's surface.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A centrifugal fan with an anti-reverse rotation limitable structure comprises a base (1) and is characterized in that; the motor (2) is installed by the position of one side on the top of base (1), the output transmission of motor (2) is connected with pivot (21), the outer fixed surface cover of pivot (21) is equipped with ratchet (22), four group installation piece (23) are installed by the position of ratchet (22) one side to the surface of pivot (21), four groups arc piece (24) are all installed to the one end of installation piece (23), centrifugal fan (25) are installed to the one end of pivot (21), two sets of mounting panel (3) are installed by the position of opposite side on the top of base (1), two sets of through groove (31) have all been seted up to the top inner wall of mounting panel (3), movable groove (32) have all been seted up to the inboard surface of two sets of mounting panel (3), spring (33) have all been installed by the position of both sides on the top of two sets of mounting panel (3), two sets of the equal movable mounting in inside of mounting panel (3) has movable rod (4), and two sets of roof (41) are all installed on the top of movable rod (4), and two sets of connecting rod (42) are all installed by the position of both sides to the surface of movable rod (4), and pulley (43) are all installed to four groups the one end of connecting rod (42), and two sets of extension board (44) are all installed by the position of opposite side to the surface of movable rod (4), and non return pawl (45) are all installed to the one end of two sets of extension board (44), and rubber column (46) are all installed to the bottom of two sets of movable rod (4), and connecting plate (5) are all installed to the inboard of mounting panel (3), and two sets of corresponding one end of connecting plate (5) is fixed mutually with the surface corresponding position of spacing ring (51) respectively, ring channel (52) have been seted up to the inner wall of spacing ring (51), and a support rod (53) is arranged on the outer surface of the limiting ring (51) close to the bottom end.
2. The centrifugal fan with the anti-reverse-rotation limitable structure according to claim 1, characterized in that: the number of the springs (33) is four, the four groups of springs (33) are equal in size, and corresponding ends of the four groups of springs (33) are fixed to corresponding positions of the bottom ends of the corresponding top plates (41).
3. The centrifugal fan with the anti-reverse-rotation limitable structure according to claim 1, characterized in that: the sizes of the two groups of the movable rods (4) are equal, and one ends of the two groups of the movable rods (4) penetrate through the inner wall of the top end of the corresponding mounting plate (3) through the corresponding penetrating grooves (31).
4. The centrifugal fan with the anti-reverse-rotation limitable structure according to claim 1, characterized in that: the four groups of pulleys (43) are equal in size, and the outer surfaces of the four groups of pulleys (43) are respectively attached to the inner wall of the corresponding side of the corresponding mounting plate (3).
5. The centrifugal fan with the anti-reverse-rotation limitable structure according to claim 1, characterized in that: the two groups of extension plates (44) are equal in size, and the two groups of extension plates (44) penetrate through the inner wall of the corresponding side of the corresponding mounting plate (3) through the corresponding movable grooves (32).
6. The centrifugal fan with the anti-reverse-rotation limitable structure according to claim 1, characterized in that: the four groups of arc-shaped blocks (24) are equal in size, the four groups of arc-shaped blocks (24) are arranged in a central symmetry mode by taking the central point of the motor (2) as a central point, and the four groups of arc-shaped blocks (24) are all located inside the annular groove (52).
7. The centrifugal fan with the anti-reverse-rotation limitable structure according to claim 1, characterized in that: the supporting rod (53) is cylindrical, and the bottom end of the supporting rod (53) is fixed with the corresponding position of the top end of the base (1).
8. The centrifugal fan with the anti-reverse-rotation limitable structure according to claim 1, characterized in that: the two groups of check pawls (45) are equal in size, and the two groups of check pawls (45) and the ratchet wheel (22) are arranged at the same horizontal height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210139838.3A CN114542484A (en) | 2022-02-16 | 2022-02-16 | Centrifugal fan with prevent reversing but limit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210139838.3A CN114542484A (en) | 2022-02-16 | 2022-02-16 | Centrifugal fan with prevent reversing but limit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114542484A true CN114542484A (en) | 2022-05-27 |
Family
ID=81676367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210139838.3A Pending CN114542484A (en) | 2022-02-16 | 2022-02-16 | Centrifugal fan with prevent reversing but limit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114542484A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB223388A (en) * | 1923-10-04 | 1924-10-23 | John Cairns | Improvements in driving and revolving means for fans and the like |
| US4410072A (en) * | 1981-08-14 | 1983-10-18 | Westinghouse Electric Corp. | Gravity controlled anti-reverse rotation device |
| CN106969044A (en) * | 2017-05-14 | 2017-07-21 | 响水县瑞丰重型轴承座制造有限公司 | A kind of back-up chock |
| CN208236766U (en) * | 2018-04-11 | 2018-12-14 | 石家庄鑫国泵业有限公司 | A kind of multi-functional excavating pump |
| CN109139502A (en) * | 2018-09-30 | 2019-01-04 | 江苏双菊风机有限公司 | A kind of centrifugal blower with anti-reverse mechanism |
| CN209959510U (en) * | 2019-04-04 | 2020-01-17 | 河北普纳德风机制造有限公司 | Mute energy-saving fan |
| CN213093975U (en) * | 2020-08-28 | 2021-04-30 | 泰兴市苏泰精密机械铸造有限公司 | Supporting device for motor rotor of refrigeration compressor |
| CN112922860A (en) * | 2021-02-25 | 2021-06-08 | 绍兴上虞育才风机制造有限公司 | Centrifugal fan |
-
2022
- 2022-02-16 CN CN202210139838.3A patent/CN114542484A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB223388A (en) * | 1923-10-04 | 1924-10-23 | John Cairns | Improvements in driving and revolving means for fans and the like |
| US4410072A (en) * | 1981-08-14 | 1983-10-18 | Westinghouse Electric Corp. | Gravity controlled anti-reverse rotation device |
| CN106969044A (en) * | 2017-05-14 | 2017-07-21 | 响水县瑞丰重型轴承座制造有限公司 | A kind of back-up chock |
| CN208236766U (en) * | 2018-04-11 | 2018-12-14 | 石家庄鑫国泵业有限公司 | A kind of multi-functional excavating pump |
| CN109139502A (en) * | 2018-09-30 | 2019-01-04 | 江苏双菊风机有限公司 | A kind of centrifugal blower with anti-reverse mechanism |
| CN209959510U (en) * | 2019-04-04 | 2020-01-17 | 河北普纳德风机制造有限公司 | Mute energy-saving fan |
| CN213093975U (en) * | 2020-08-28 | 2021-04-30 | 泰兴市苏泰精密机械铸造有限公司 | Supporting device for motor rotor of refrigeration compressor |
| CN112922860A (en) * | 2021-02-25 | 2021-06-08 | 绍兴上虞育才风机制造有限公司 | Centrifugal fan |
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