CN115095538A - Automatic reversing fan and self-cleaning air-cooled cooler adopting same - Google Patents
Automatic reversing fan and self-cleaning air-cooled cooler adopting same Download PDFInfo
- Publication number
- CN115095538A CN115095538A CN202210527980.5A CN202210527980A CN115095538A CN 115095538 A CN115095538 A CN 115095538A CN 202210527980 A CN202210527980 A CN 202210527980A CN 115095538 A CN115095538 A CN 115095538A
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- Prior art keywords
- blade
- fan
- reversing
- bevel gear
- motor
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- 238000004140 cleaning Methods 0.000 title claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 abstract description 8
- 238000005299 abrasion Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 125000006850 spacer group Chemical group 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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
- F04D29/329—Details of the hub
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
- F04D29/362—Blade mountings adjustable during rotation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an automatic reversing fan which can change the blowing direction of the fan so as to meet the use requirement of a specific working condition. Correspondingly, the invention also provides a self-cleaning air-cooled cooler adopting the automatic reversing fan. The automatic reversing fan comprises a motor, a blade driving mechanism and a group of fan blades, wherein a rotating shaft of the motor is in transmission connection with the fan blades through the blade driving mechanism; the blade driving mechanism comprises a driving bevel gear, a driven bevel gear, a rear half shell, a front half shell and a group of blade reversing shafts; the blade driving mechanism comprises a driving bevel gear, a driven bevel gear, a rear half shell, a front half shell and a group of blade reversing shafts. The self-cleaning air-cooled cooler adopts an automatic reversing fan; when the air path is blocked, the motor rotates reversely to drive the blade reversing shaft to change the orientation of the fan blade, and after the blade reversing shaft rotates to the extreme position, the rotating shaft of the motor drives the impeller to rotate reversely integrally, so that air is blown out of the blockage in a reverse direction, and self-cleaning is realized.
Description
Technical Field
The invention relates to a cooler and a fan thereof, in particular to an automatic reversing fan and an air cooling cooler adopting the automatic reversing fan.
Background
In large transformers such as high-voltage transformers and extra-high voltage transformers, heat is continuously generated when the transformers run, so that coolers are required to be installed in the transformers to ensure stable operation of the transformers, and a common cooler in the transformers is an oil-air cooler, for example, chinese patent application No. CN202110902500.4 discloses an oil-air cooler with elliptical fin tubes, which uses a fan to drive air to pass through the surfaces of the elliptical fin tubes to transfer heat of transformer oil in the fin tubes to the air. For the cooler, because the fan can only rotate in one direction, after the cooler works for a long time, the air path inlet of the cooler may be blocked due to blockage caused by excessive adsorption, so that the heat exchange effect of the cooler is influenced, and the normal work of the transformer is further influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the automatic reversing fan, which can change the blowing direction of the fan so as to meet the use requirement of a specific working condition. Correspondingly, the invention also provides a self-cleaning air-cooled cooler adopting the automatic reversing fan, and when the cooler is blocked, the cooler can blow out the blocked objects to realize automatic cleaning by changing the blowing direction of the fan.
For the fan, the technical scheme of the invention is as follows:
the automatic reversing fan comprises a motor, a blade driving mechanism and a group of fan blades, wherein a rotating shaft of the motor is in transmission connection with the fan blades through the blade driving mechanism; the blade driving mechanism comprises a driving bevel gear, a driven bevel gear, a rear half shell, a front half shell and a group of blade reversing shafts; the rear half shell is mounted on a rotating shaft of the motor through an A support bearing, the front half shell and the rear half shell are combined to form a shell, the blade reversing shaft is matched with a corresponding through hole in the shell and can rotate, the driving bevel gear is mounted on the rotating shaft of the motor, the driven bevel gear is mounted at the inner end of the blade reversing shaft and meshed with the driving bevel gear, and the outer end of the blade reversing shaft is fixedly provided with a fan blade; the axial line of the blade reversing shaft is positioned on the combining surface of the rear half shell and the front half shell; the fan blade reversing mechanism is characterized in that a limiting pin column is arranged on the blade reversing shaft, a groove is correspondingly formed in the hole wall of the through hole, the limiting pin column is located in the groove, so that the blade reversing shaft cannot move in the axial direction, the limiting pin column can rotate for a certain angle along with the blade reversing shaft in the groove due to the shape of the groove, and therefore the limiting pin column can rotate to another limiting position from one limiting position in the groove, and the orientation of a fan blade is changed.
Compared with the prior art, the automatic reversing fan can change the direction of the blades and the direction of the blades by changing the direction of the motor, so that the blowing direction is changed, and the use requirements of some special working conditions are met; during normal work, motor corotation, the epaxial spacing round pin post of blade reversing is in one of them extreme position in the recess, form spacingly, the motor drives fan blade corotation, carry out the forward and blow, when needing reverse blowing, the control motor reversal, the motor shaft passes through blade actuating mechanism and drives the rotation of blade reversing shaft and reach another extreme position until the spacer pin, form spacingly, realize changing fan blade's orientation, afterwards, the motor drives fan blade reversal, the direction of blowing is opposite when with motor corotation.
Preferably, in the automatic reversing fan, an auxiliary support bevel gear is arranged in the front half shell, a center line of the auxiliary support bevel gear coincides with a center line of the driving bevel gear, and the auxiliary support bevel gear is engaged with the driven bevel gear. The auxiliary support bevel gear can provide support for the driven bevel gear, balance stress of the driven bevel gear and the blade reversing shaft, reduce abrasion and prolong the service life of the blade driving mechanism. Furthermore, the auxiliary support bevel gear is arranged on a rotating shaft of the motor through a rotary pair structure. At the moment, compared with the situation that the auxiliary support bevel gear is arranged on the front half shell, the stress is reasonable, and the reliability of the reversing mechanism is higher. Furthermore, the front end of a rotating shaft of the motor is connected with the front half shell through a B support bearing; and the supporting bearing B is arranged, so that the supporting force at the tail end of the rotating shaft can be increased, and the structural reliability is improved. Further, a shaft sleeve is arranged between the auxiliary support bevel gear and the B support bearing, and the right end face of the auxiliary support bevel gear abuts against the shaft sleeve; the rotating shaft of the motor is a stepped shaft, and the left end surface of the auxiliary support bevel gear is in contact with the limiting surface of the stepped shaft; therefore, the auxiliary support bevel gear can only rotate on the rotating shaft, the axial movement is limited, and the structural reliability is good.
Preferably, in the above automatic reversing fan, a curved surface structure for guiding air is provided at the front side of the front half shell. The curved surface structure can effectively reduce the wind resistance. Furthermore, the wind guide surface of the curved surface structure can adopt a hemispherical surface.
Preferably, in the above automatic reversing fan, the cross-sectional shape of the groove may be semicircular.
Preferably, in the above automatic reversing fan, the allowable rotation angle of the blade reversing shaft is 180 degrees. After the fan blade rotates 180 degrees, the fan blade reaches the optimal position, and the wind force of the reverse wind can reach the maximum.
Preferably, the automatic reversing fan further comprises an air duct, and the motor is fixedly mounted on a motor mounting seat in the air duct. Furthermore, a mesh enclosure is arranged at the front end of the air duct. The setting of screen panel can keep apart debris, avoids during debris gets into the fan.
For the cooler, the invention provides the following technical scheme:
the self-cleaning air-cooled cooler is the automatic reversing fan; when the air path is blocked, the motor is controlled to rotate reversely, the blade reversing shaft is driven to change the orientation of the fan blade, and after the blade reversing shaft rotates to the extreme position, the rotating shaft of the motor drives the impeller to rotate reversely integrally and blow air reversely, so that a blockage causing the air path blockage is blown out, and self-cleaning is realized.
Compared with the prior art, the air-cooled cooler disclosed by the invention can change the blowing direction by controlling the motor of the fan to rotate reversely when the air path is blocked, so that the blockage is blown away, and the purpose of automatic cleaning is achieved.
Drawings
FIG. 1 is a schematic structural view of an automatic reversing fan of the present invention;
FIG. 2 is an enlarged view of the vane drive mechanism taken at circle A in FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 4 is a schematic view of the position of the limit pin in the forward rotation of the fan blade of FIG. 3;
FIG. 5 is a schematic view of the position of the limit pin in the event of reversal of the fan blade of FIG. 3;
FIG. 6 is a schematic view of a cooler equipped with the automatic reversing fan of the present invention;
the labels in the figures are: 1-a motor; 2-blade driving mechanism, 201-driving bevel gear, 202-driven bevel gear, 203-rear half shell, 204-front half shell, 205-blade reversing shaft, 206-junction surface, 207-through hole, 208-limit pin column, 209-groove, 210-auxiliary support bevel gear; 3-a fan blade; 4-A support bearing; 5-curved surface structure; 6-B support bearings; 7-a cooler body; 8-an air duct; 9-motor mounting seat; 10-shaft sleeve; 11-mesh enclosure.
Detailed Description
The present invention is further illustrated by the following specific examples, which are not to be construed as limiting the invention. Not described in detail below is common general knowledge in the art.
Examples, see FIGS. 1-6:
in the embodiment, the oil air cooling area device for the transformer adopts the automatic reversing fan. When the air passage is blocked, the blowing direction can be changed by controlling the motor to rotate reversely, and the blockage is blown away, so that automatic cleaning is realized.
In the embodiment, the automatic reversing fan comprises a motor 1, a blade driving mechanism 2 and a group of fan blades 3, wherein a rotating shaft of the motor 1 is in transmission connection with the fan blades 3 through the blade driving mechanism 2; the blade driving mechanism 2 comprises a driving bevel gear 201, a driven bevel gear 202, a rear half shell 203, a front half shell 204 and a group of blade reversing shafts 205; the rear half shell 203 is mounted on a rotating shaft of the motor 1 through an A support bearing 4, the front half shell 204 and the rear half shell 203 are combined to form a shell, the blade reversing shaft 205 is matched with a corresponding through hole 207 on the shell to rotate, the driving bevel gear 201 is mounted on the rotating shaft of the motor 1, the driven bevel gear 202 is mounted at the inner end of the blade reversing shaft 205 and meshed with the driving bevel gear 201, and the outer end of the blade reversing shaft 205 is fixedly provided with the fan blade 3; the axis of the blade reversing shaft 205 is positioned on a joint surface 206 of the rear half shell 203 and the front half shell 204; the blade reversing shaft 205 is provided with a limiting pin 208, the hole wall of the through hole 207 is correspondingly provided with a groove 209, the limiting pin 208 is positioned in the groove 209, so that the blade reversing shaft 205 cannot move in the axial direction, and the shape of the groove 209 enables the limiting pin 208 to rotate with the blade reversing shaft 205 by a certain angle in the groove 209, so that the limiting pin 208 can rotate from one limit position to the other limit position in the groove 209, and the orientation of the fan blade 3 can be changed.
In the present embodiment, an auxiliary support bevel gear 210 is provided in the front half shell 204, the center line of the auxiliary support bevel gear 210 coincides with the center line of the driving bevel gear 201, and the auxiliary support bevel gear 210 is engaged with the driven bevel gear 202. The auxiliary support bevel gear 210 can provide support for the driven bevel gear 202, balance the stress of the driven bevel gear 202 and the blade reversing shaft 205, reduce abrasion and prolong the service life of the blade driving mechanism 2. Further, the auxiliary support bevel gear 210 is arranged on the rotating shaft of the motor 1 through a rotary pair structure. Further, the front end of the rotating shaft of the motor 1 is connected with the front half shell 204 through a B support bearing 6; the arrangement of the support bearing 6 can increase the supporting force of the tail end of the rotating shaft. Further, a shaft sleeve 10 is arranged between the auxiliary support bevel gear 210 and the B support bearing 6, and the right end surface of the auxiliary support bevel gear 210 abuts against the shaft sleeve 10; the rotating shaft of the motor 1 is a stepped shaft, and the left end surface of the auxiliary support bevel gear 210 is in contact with the limiting surface of the stepped shaft; so that the auxiliary support bevel gear 210 can only rotate on the rotating shaft and the movement in the axial direction is limited.
In this embodiment, a curved surface structure 5 for guiding air is provided on the front side of the front half shell 204 (in this embodiment, the air guiding surface of the curved surface structure 5 is a hemispherical surface). The curved surface structure 5 can effectively reduce wind resistance.
In this embodiment, the cross-sectional shape of the groove 209 is semi-circular.
In this embodiment, the fan further includes an air duct 8, the motor 1 is fixedly mounted on a motor mounting seat 9 in the air duct 8, and further, a mesh enclosure 11 is mounted at the front end of the air duct 8. The setting of screen panel 11 can keep apart debris, avoids during debris gets into the fan.
When the transformer oil cooler works, transformer oil in a transformer oil tank flows through the cooler body 7 under the action of an oil pump, the motor 1 rotates forwards in the flowing process of the transformer oil, the position of the limiting pin 208 in the groove 209 is shown in fig. 4 at the moment, the motor 1 drives the fan blade 3 to rotate, air enters from the air inlet, and the air exchanges heat with hot oil in the cooler body 7 to take away heat in the transformer oil. During working, the pressure transmitters of the air inlet and the air outlet are used for collecting air pressure at two positions and sending data to the processor, and the processor compares the received pressure difference with a set value; when the processor judges that the air passage of the cooler is blocked, a signal is sent to the motor controller; the motor controller receives the signal and then controls the motor 1 to stop rotating, then the motor 1 rotates reversely, and the fan blade 3 is reversed (the blade reversing shaft 205 rotates 180 degrees, and the direction of the fan blade 3 is changed); after the fan blade 3 is reversed, the motor 1 is reversed to drive the fan blade 3 to be reversed, the fan blows air in the reverse direction (if the orientation of the fan blade 3 is not changed, the air flow direction can be changed by reversing the fan blade 3, but the air flow flowing in the reverse direction is weak, obvious air cannot be formed, and the purpose of the invention cannot be achieved), and the blockage is blown away, so that the purpose of automatically cleaning the air path is achieved.
It should be noted that the automatic reversing fan of the present invention has been developed to meet the requirements of a cooler for a transformer, but is not limited to the application in the above embodiments. The above descriptions of "left", "right", "front" and "rear" of the invention in this application are relative to fig. 1, and should not be construed as limiting the technical solution of the invention.
The above general description of the invention and the description of the specific embodiments thereof, as referred to in this application, should not be construed as limiting the technical solutions of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the protection scope of the present application according to the disclosure of the present application without departing from the structural elements of the present invention.
Claims (11)
1. Automatic switching-over fan, its characterized in that: the fan blade driving device comprises a motor (1), a blade driving mechanism (2) and a group of fan blades (3), wherein a rotating shaft of the motor (1) is in transmission connection with the fan blades (3) through the blade driving mechanism (2); the blade driving mechanism (2) comprises a driving bevel gear (201), a driven bevel gear (202), a rear half shell (203), a front half shell (204) and a group of blade reversing shafts (205); the rear half shell (203) is mounted on a rotating shaft of the motor (1) through an A support bearing (4), the front half shell (204) and the rear half shell (203) are combined to form a shell, the blade reversing shaft (205) is matched with a corresponding through hole (207) in the shell to rotate, the driving bevel gear (201) is mounted on the rotating shaft of the motor (1), the driven bevel gear (202) is mounted at the inner end of the blade reversing shaft (205) and meshed with the driving bevel gear (201), and the outer end of the blade reversing shaft (205) is fixedly mounted with a fan blade (3); the axis of the blade reversing shaft (205) is positioned on a joint surface (206) of the rear half shell (203) and the front half shell (204); the fan blade reversing shaft is characterized in that a limiting pin column (208) is arranged on the blade reversing shaft (205), a groove (209) is correspondingly formed in the hole wall of the through hole (207), the limiting pin column (208) is located in the groove (209) to enable the blade reversing shaft (205) not to move in the axial direction, and the shape of the groove (209) enables the limiting pin column (208) to rotate for a certain angle along with the blade reversing shaft (205) in the groove (209), so that the limiting pin column (208) can rotate to the other limiting position from one limiting position to the other limiting position in the groove (209), and the orientation of the fan blade (3) is changed.
2. The self-reversing fan of claim 1, wherein: an auxiliary support bevel gear (210) is arranged in the front side half shell (204), the center line of the auxiliary support bevel gear (210) is overlapped with the center line of the driving bevel gear (201), and the auxiliary support bevel gear (210) is meshed with the driven bevel gear (202).
3. The self-reversing fan of claim 2, wherein: the auxiliary support bevel gear (210) is arranged on a rotating shaft of the motor (1) through a rotary pair structure.
4. The self-reversing fan of claim 3, wherein: the front end of a rotating shaft of the motor (1) is connected with the front half shell (204) through a B support bearing (6).
5. The automatic reversing fan of claim 4, wherein: a shaft sleeve (10) is arranged between the auxiliary support bevel gear (210) and the B support bearing (6), and the right end surface of the auxiliary support bevel gear (210) is abutted against the shaft sleeve (10); the rotating shaft of the motor (1) is a stepped shaft, and the left end face of the auxiliary support bevel gear (210) is in contact with the limiting face of the stepped shaft.
6. The self-reversing fan of claim 1, wherein: the front side of the front half shell (204) is provided with a curved surface structure (5) for guiding wind.
7. The self-reversing fan of claim 1, wherein: the cross-sectional shape of the groove (209) is semi-circular.
8. The self-reversing fan of claim 1, wherein: the allowable rotation angle of the blade reversing shaft (205) is 180 degrees.
9. The automatically reversing fan according to any one of claims 1-7, wherein: the air guide device is characterized by further comprising an air guide cylinder (8), and the motor (1) is fixedly arranged on a motor mounting seat (9) in the air guide cylinder (8).
10. The self-reversing fan of claim 9, wherein: and a mesh enclosure (11) is arranged at the front end of the air duct (8).
11. Self-cleaning air-cooled cooler, its characterized in that: the air-cooled cooler adopts the automatic reversing fan of claim 1; when the air path is blocked, the motor (1) is controlled to rotate reversely, the blade reversing shaft (205) is driven to change the orientation of the fan blades (3), and after the blade reversing shaft (205) rotates to the extreme position, the rotating shaft of the motor (1) drives the impeller to rotate reversely integrally and blow air reversely, so that a blockage causing the air path blockage is blown out, and self-cleaning is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210527980.5A CN115095538A (en) | 2022-05-16 | 2022-05-16 | Automatic reversing fan and self-cleaning air-cooled cooler adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210527980.5A CN115095538A (en) | 2022-05-16 | 2022-05-16 | Automatic reversing fan and self-cleaning air-cooled cooler adopting same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115095538A true CN115095538A (en) | 2022-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210527980.5A Pending CN115095538A (en) | 2022-05-16 | 2022-05-16 | Automatic reversing fan and self-cleaning air-cooled cooler adopting same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115095538A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116816702A (en) * | 2023-07-11 | 2023-09-29 | 德州隆达空调设备集团有限公司 | Smoke exhaust fan capable of preventing return air |
-
2022
- 2022-05-16 CN CN202210527980.5A patent/CN115095538A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116816702A (en) * | 2023-07-11 | 2023-09-29 | 德州隆达空调设备集团有限公司 | Smoke exhaust fan capable of preventing return air |
| CN116816702B (en) * | 2023-07-11 | 2024-01-09 | 德州隆达空调设备集团有限公司 | Smoke exhaust fan capable of preventing return air |
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