CN112081766B - Anti-backflow fan device for computer - Google Patents
Anti-backflow fan device for computer Download PDFInfo
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- CN112081766B CN112081766B CN202010972349.7A CN202010972349A CN112081766B CN 112081766 B CN112081766 B CN 112081766B CN 202010972349 A CN202010972349 A CN 202010972349A CN 112081766 B CN112081766 B CN 112081766B
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- 238000000034 method Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 239000000696 magnetic material Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 4
- 230000002452 interceptive effect Effects 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 9
- 230000006872 improvement Effects 0.000 description 9
- 241000883990 Flabellum Species 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
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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
- 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
- F04D29/34—Blade mountings
- F04D29/36—Blade mountings adjustable
- F04D29/362—Blade mountings adjustable during rotation
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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
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of fans, and particularly relates to a backflow-preventing fan device used for a computer, which comprises a base, a bracket fixed on the base, a driving motor arranged on the bracket, and a fan body arranged on an output shaft of the driving motor, wherein when one of the fans fails, the fan stops rotating, at the moment, an adjusting device corresponding to the fan is controlled to enable an adjusting ring in the adjusting device to move downwards, the adjusting ring moves downwards to enable fan blades to be swung and leveled from a side-swinging state, and the fan blades are combined together to shield an air port of the fan to a certain extent, so that the failed fan is prevented from generating airflow backflow, thereby causing airflow disorder and influencing the heat dissipation of a system; the invention designs a structure integrating a wind shielding structure and a fan unit, when the fan unit has a problem, the fan unit is directly replaced, and when the wind shielding mechanism has a problem, the fan unit corresponding to the wind shielding sheet is detached and replaced by a new fan unit.
Description
Technical Field
The invention belongs to the technical field of fans, and particularly relates to a backflow preventing fan device for a computer.
Background
Along with the rapid update of electronic products, the hardware performance of computers is more and more powerful, which inevitably results in that the computer hardware with good performance can generate a large amount of heat when in use, and the temperature of the computer hardware is too high when in work, so that the use performance of the computer hardware can be greatly reduced, therefore, a heat dissipation mechanism needs to be arranged to effectively dissipate heat, and the hardware is ensured to keep high-performance operation for a long time.
In a computer, a plurality of fans are usually installed to dissipate heat of electronic components in the electronic product. However, when some fans stop rotating due to a fault, the fault fan may generate an air flow backflow, thereby causing an air flow disturbance and affecting the heat dissipation of the system.
For the fan fixing device designed in the publication No. 103906408, in order to solve the problem, a first wind-blocking sheet and a second wind-blocking sheet are arranged on the fan frame, and the first wind-blocking sheet and the second wind-blocking sheet vertically cover the side of the fan vent opposite to the fan through the action of gravity, so that the backflow wind flow can be blocked; however, when a certain wind-blocking sheet structure in the shielding mechanism breaks down, the whole fan frame is inevitably replaced instead of maintained according to the current after-sale service rule, and when the fan unit on the original fan frame is replaced, the fan unit needs to be detached and reinstalled on a newly replaced mounting frame, so that the operation is very troublesome, and the replacement performance is relatively low. In addition, the baffle plate of the patent depends on the gravity action, so the installation axis of the fan unit of the baffle plate is required to be horizontally arranged, and the installation flexibility of the fan unit is influenced. .
The invention designs an anti-backflow fan device for a computer to solve the problems.
Disclosure of Invention
In order to solve the above defects in the prior art, the invention discloses a backflow preventing fan device for a computer, which is realized by adopting the following technical scheme.
The utility model provides an anti-return fan device that computer used, it includes the base, be fixed in the support on the base, install driving motor on the support, install the fan body on the driving motor output shaft, its characterized in that: the fan body consists of a rotor and fan blades, one end of the rotor is provided with a nested circular groove, the rotor is nested at one end of the driving motor, which is provided with an output shaft, through the nested circular groove, and the inner end surface of the nested circular groove is fixedly connected with the output shaft of the driving motor; the installation mode of the rotor designed by the invention is the same as that of the rotor in the traditional computer fan; one end of the rotor is nested on the driving motor and is overlapped with the driving motor into a part, so that the design has the advantages that the occupied space of the driving motor and the rotor can be reduced, the structure distribution of the fan is compact, and the occupied space of the fan in a computer shell is reduced; the plurality of fan blades are uniformly arranged on the outer circular surface of the rotor in the circumferential direction, and a control device for controlling the fan blades to swing from a horizontal state to a side-swinging state is respectively arranged between each fan blade and the rotor; in the working state, the corresponding fan blades can swing by a certain angle relative to the horizontal state through the control device, the angle is basically the same as the angle of the fan blades arranged on the rotor in the traditional fan, and the fan blades can normally work under the angle to dissipate heat of the computer; and one end of the rotor, which is far away from the driving motor, is provided with an adjusting device, and the adjusting device controls the fan blades to swing from a side-swinging state to a horizontal state.
As a further improvement of the technology, a plurality of circular chutes are uniformly formed in the outer circular surface of the rotor in the circumferential direction, one end, close to the outer circular surface of the rotor, of each circular chute is provided with a through circular opening, two guide chutes are uniformly formed in the inner circular surface of each circular chute in the circumferential direction, and each circular chute is internally provided with a limiting ring.
The control device comprises a volute spiral spring, a sliding sleeve, a fixed shaft and a guide sliding block, wherein an external thread is arranged on the outer circular surface of one end of the fixed shaft, the fixed shaft is arranged on the rotor through a circular opening formed in the rotor, and the fixed shaft is in running fit with the circular opening; one end of the fixed shaft, which is not provided with the external thread, is positioned outside the rotor and is connected with the corresponding fan blade; a volute spiral spring is arranged between the fixed shaft and the corresponding circular sliding groove, the outer end of the volute spiral spring is fixedly arranged on the inner circular surface of the corresponding circular sliding groove, and the inner end of the volute spiral spring is fixedly arranged on the outer circular surface of the fixed shaft; the volute spiral spring is positioned on one side, close to the outer circular surface of the rotor, of the limiting ring installed in the corresponding circular sliding chute; the volute spiral spring has pretightening force, when an adjusting ring in the adjusting device loses downward pressure on fan blades, under the pretightening force of the volute spiral spring, the inner end of the volute spiral spring drives the fixed shaft to rotate, the fixed shaft drives the corresponding fan blades to swing, so that the fan blades swing obliquely by a certain angle, and under the angle, when the rotor rotates, the rotor drives the fan blades to rotate, and the fan blades rotate to radiate heat to a computer; the inner circular surface of the sliding sleeve is provided with internal threads, the outer circular surface of the sliding sleeve is circumferentially and uniformly provided with two guide sliding blocks, the sliding sleeve is arranged in the corresponding circular sliding chute through the sliding fit of the two guide sliding blocks and the two guide sliding chutes, and the internal threads on the sliding sleeve are in threaded fit with the external threads on the fixed shaft; the sliding sleeve is positioned on one side, away from the outer circular surface of the rotor, of the limiting ring installed in the corresponding circular sliding chute; the thread lead angle of the external thread on the fixed shaft is equal to 45 degrees; the thread lead angle of the internal thread on the sliding sleeve is equal to 45 degrees.
The thread lead angle of the external thread on the fixed shaft is equal to 45 degrees; the thread lead angle of the internal thread on the sliding sleeve is equal to 45 degrees, under the angle, the fixed shaft and the sliding sleeve can smoothly slide in the process that the fixed shaft rotates or the sliding sleeve linearly moves, and the self-locking phenomenon caused by too large or too small thread lead angle cannot occur; in addition, in the invention, in order to further improve the lubrication degree between the fixed shaft and the sliding sleeve, lubricating grease is added between the sliding sleeve and the fixed shaft.
As a further improvement of the technology, a limiting disc for preventing the fixed shaft from sliding out of the corresponding circular sliding groove is arranged on all the fixed shafts arranged on the rotor.
As a further improvement of the present technology, a plurality of square openings are uniformly formed in the circumferential direction on the outer circumferential surface of the upper end of the rotor, a square mounting groove is formed on the inner end surface of each square opening, a square guide groove is formed on the inner end surface of each square mounting groove, and a square sliding groove is formed on the inner end surface of each square guide groove.
The adjusting device comprises an adjusting unit, an adjusting ring and a mounting disc, wherein the mounting disc is fixedly mounted on one side, far away from the driving motor, of the rotor through a fixing column; the adjusting ring is arranged on the outer circular surface of the rotor in a sliding fit manner; a plurality of adjusting units are uniformly arranged between the adjusting ring and the mounting disc in the circumferential direction.
The adjusting unit comprises a first electromagnet, a spring fixing disc, a first spring, a clamping block, a fixing rod, a second spring and a second electromagnet, wherein the first electromagnet is fixedly arranged on the end surface, close to the adjusting ring, of the mounting disc, a first magnetic coil is arranged on the outer side of the first electromagnet, one end of the fixing rod is fixedly arranged on the end surface, close to the mounting disc, of the adjusting ring, the spring fixing disc is fixedly arranged at the other end of the fixing rod, and the spring fixing disc is made of soft magnetic materials; the guide support is fixedly arranged on the outer circular surface of the rotor and is in sliding fit with the fixed rod; a first spring with pretightening force is arranged between the guide support and the spring fixing disc; the second electromagnet is fixedly arranged in a square sliding groove formed in the rotor, and a second magnetic coil is arranged on the outer side of the second electromagnet; one end of the fixture block is fixedly provided with a guide mounting ring, the fixture block is arranged on the rotor in a sliding fit manner through the guide mounting ring and a square mounting groove formed in the rotor, and a second spring with pretightening force is arranged between the guide mounting ring and the corresponding square mounting groove; one end of each clamping block is made of soft magnetic materials and penetrates into the corresponding square guide groove between the square sliding groove and the square mounting groove; the other end of the clamping block penetrates through the corresponding square opening to be in limit fit with the adjusting ring.
As a further improvement of the technology, the first electromagnet and the second electromagnet are connected in a brush type, so that the rotation of the rotor does not affect the electricity; the controller is installed on the base and identifies whether the fan blades rotate or not through the sensor to control whether the first electromagnet and the second electromagnet are electrified or not.
As a further improvement of the technology, a plurality of avoiding gaps for preventing the fan blades from interfering with the outer circular surface of the rotor in the swinging process are uniformly formed on the outer circular surface of the rotor in the circumferential direction.
As a further improvement of the technology, the fixed shaft is detachably connected with the corresponding fan blades.
As a further improvement of the technology, the fixed shaft is connected with the corresponding round opening through a bearing.
As the further improvement of this technique, above-mentioned fixed column passes through welded mode fixed mounting on the mounting disc, and the fixed column passes through welded mode fixed mounting on the terminal surface of rotor keeping away from driving motor one side.
As a further improvement of the technology, when the adjusting ring is positioned at the uppermost end, the electrifying current of the first electromagnet is larger than that of the second electromagnet when the clamping block is retracted; when the first electromagnet and the second electromagnet are electrified before use, the fixing rod gradually moves upwards and the clamping block retracts, and when the clamping block retracts and completely retracts into the rotor, the upper end face of the adjusting ring driven by the fixing rod does not move to reach the lower end face of the clamping block.
Compared with the traditional fan technology, the fan has the following beneficial effects:
1. before the fan used by the computer designed by the invention is used, firstly, the adjusting device needs to be controlled to enable the adjusting ring in the adjusting device to move upwards, the limitation on the fan blades is removed, the fan blades automatically swing a certain angle relative to the horizontal state under the action of the corresponding volute spiral springs, the angle is basically the same as the angle of the fan blades arranged on the rotor in the traditional fan, and the fan blades can normally work under the angle to dissipate heat of the computer; namely, the fan has the function of radiating heat of the fan arranged in the traditional computer.
2. The computer is usually provided with a plurality of fans, and the fans used by the computer designed by the invention stop rotating when one fan fails, and at the moment, the adjusting device corresponding to the fan is controlled to enable the adjusting ring in the adjusting device to move downwards, and the adjusting ring moves downwards to swing the fan blades from a side-swinging state to be flat and combined together, so that the air port of the fan is shielded to a certain extent, and the problem that the failed fan generates airflow backflow to cause airflow disorder and influence on system heat dissipation is avoided; meanwhile, the dust can be prevented from floating into the inner side of the fan after the fan breaks down to a certain extent.
3. The fan used by the computer designed by the invention is provided with the sliding sleeve on the fixed shaft; if the volute spiral spring is damaged and fails after long-time use, the fan blades cannot normally sway laterally; under this kind of state, when the rotor rotated, the sliding sleeve would produce centrifugal force, under this centrifugal force, the sliding sleeve would be relative fixed axle along the axis straight line slip that corresponds circular spout, and the sliding sleeve can drive rather than the fixed axle through screw-thread fit rotates at the slip in-process, and the fixed axle rotates and drives the flabellum swing that corresponds for the flabellum takes place the side pendulum, and under this kind of state, the swing angle of flabellum is the same with the swing angle of the flabellum that corresponds that other volute spiral spring did not harm, can not influence normal work.
4. The invention designs a structure integrating a wind shielding structure and a fan unit, when the fan unit has a problem, the fan unit is directly replaced, when the wind shielding mechanism has a problem, the fan unit corresponding to the wind shielding sheet is detached to replace a new fan unit, and after batch production, the simple replacement of the low-cost fan unit is more suitable for the current after-sale service compared with the fussy replacement operation in the comparison patent mentioned in the background.
5. The structure operation in the invention is not influenced by gravity, and the arrangement position and direction of the fan can be flexibly arranged according to the setting requirement.
Drawings
Fig. 1 is an external view of an entire part.
Fig. 2 is a schematic view of the overall component distribution.
Fig. 3 is a schematic view of the internal structure installation of the integral component.
Fig. 4 is a schematic view of a drive motor installation.
Fig. 5 is a schematic view of the adjustment device installation.
Fig. 6 is a schematic view of the installation of the first electromagnet.
Fig. 7 is a second electromagnetic quick mount schematic.
FIG. 8 is a schematic view of a fan blade installation.
Fig. 9 is a schematic structural diagram of the control device.
FIG. 10 is a schematic view of the connection of the fan blades and the fixed shaft.
Fig. 11 is a schematic view of a rotor structure.
Fig. 12 is a schematic view of the structure of the circular chute and the square chute.
Fig. 13 is a schematic view of the operation principle of the latch.
Fig. 14 is a schematic diagram of a fixture block working principle II.
Fig. 15 is a third schematic view of the operating principle of the latch.
Number designation in the figures: 1. a base; 2. a fan body; 3. an adjustment device; 4. a support; 5. a drive motor; 6. an adjustment unit; 7. a control device; 8. nesting the circular grooves; 12. fixing a column; 13. mounting a disc; 14. a first electromagnet; 15. a first magnetic coil; 16. an adjusting ring; 17. a guide mounting ring; 18. a spring fixing disc; 19. a first spring; 20. a guide support; 21. a clamping block; 22. fixing the rod; 23. a second spring; 24. a second magnetic coil; 25. a second electromagnet; 26. a rotor; 27. a fan blade; 28. a volute spiral spring; 29. a sliding sleeve; 30. a fixed shaft; 31. a limiting ring; 32. an internal thread; 33. a guide slider; 34. an external thread; 35. a limiting disc; 36. avoiding the notch; 37. a square chute; 38. a circular chute; 39. a square opening; 40. a square mounting groove; 41. a square guide groove; 42. a circular port; 43. a guide chute.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples or figures are illustrative of the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, 2 and 3, it includes a base 1, a bracket 4 fixed on the base 1, a driving motor 5 installed on the bracket 4, and a fan body 2 installed on the output shaft of the driving motor 5, and is characterized in that: as shown in fig. 8, the fan body 2 is composed of a rotor 26 and fan blades 27, as shown in fig. 12, one end of the rotor 26 is provided with a nesting circular groove 8, as shown in fig. 4 and 5, the rotor 26 is nested at one end of the driving motor 5 provided with an output shaft through the nesting circular groove 8, and the inner end surface of the nesting circular groove 8 is fixedly connected with the output shaft of the driving motor 5; the rotor 26 of the present invention is mounted in the same manner as the rotor 26 of a conventional computer fan; one end of the rotor 26 is nested on the driving motor 5 and is overlapped with a part of the driving motor 5, so that the design has the advantages that the occupied space of the driving motor 5 and the rotor 26 can be reduced, the structure distribution of the fan is compact, and the occupied space of the fan in a computer shell is reduced; a plurality of fan blades 27 are circumferentially and uniformly arranged on the outer circumferential surface of the rotor 26, and a control device 7 for controlling the fan blades 27 to swing from a horizontal state to a side-swinging state is respectively arranged between each fan blade 27 and the rotor 26; in the working state, the control device 7 can make the corresponding fan blade 27 swing a certain angle relative to the horizontal state, and the angle is basically the same as the angle of the fan blade 27 installed on the rotor 26 in the traditional fan, and the fan blade 27 can normally work under the angle to dissipate heat of the computer; the end of the rotor 26 remote from the drive motor 5 is provided with an adjusting device 3, and the adjusting device 3 controls the fan blades 27 to swing from a side-swinging state to a horizontal state.
As shown in fig. 12, a plurality of circular chutes 38 are uniformly formed in the circumferential direction on the outer circumferential surface of the rotor 26, a through circular opening 42 is formed at one end of each circular chute 38 close to the outer circumferential surface of the rotor 26, two guide chutes 43 are uniformly formed in the circumferential direction on the inner circumferential surface of each circular chute 38, and a limit ring 31 is mounted in each circular chute 38.
As shown in fig. 9, the control device 7 comprises a volute spiral spring 28, a sliding sleeve 29, a fixed shaft 30 and a guiding slider 33, wherein as shown in fig. 10, an external thread 34 is formed on the outer circumferential surface of one end of the fixed shaft 30, the fixed shaft 30 is mounted on the rotor 26 through a circular opening 42 formed in the rotor 26, and the fixed shaft 30 is in rotating fit with the circular opening 42; one end of the fixed shaft 30, which is not provided with the external thread 34, is positioned outside the rotor 26 and is connected with the corresponding fan blade 27; as shown in fig. 9, a spiral spring 28 is installed between the fixed shaft 30 and the corresponding circular sliding slot 38, an outer end of the spiral spring 28 is fixedly installed on an inner circular surface of the corresponding circular sliding slot 38, and an inner end of the spiral spring 28 is fixedly installed on an outer circular surface of the fixed shaft 30; the spiral spring 28 is located at one side of the limiting ring 31 installed in the corresponding circular sliding groove 38, which is close to the outer circular surface of the rotor 26; the volute spiral spring 28 designed by the invention has pretightening force, when the adjusting ring 16 in the adjusting device 3 loses downward pressure on the fan blades 27, under the pretightening force of the volute spiral spring 28, the inner end of the volute spiral spring 28 drives the fixed shaft 30 to rotate, the fixed shaft 30 drives the corresponding fan blades 27 to swing, so that the fan blades 27 swing obliquely by a certain angle, under the certain angle, when the rotor 26 rotates, the rotor 26 drives the fan blades 27 to rotate, and the fan blades 27 rotate to radiate heat of a computer; the inner circle surface of the sliding sleeve 29 is provided with an internal thread 32, the outer circle surface of the sliding sleeve 29 is circumferentially and uniformly provided with two guide sliding blocks 33, the sliding sleeve 29 is arranged in the corresponding circular sliding chute 38 through the sliding fit of the two guide sliding blocks 33 and the two guide sliding chutes 43, and the internal thread 32 on the sliding sleeve 29 is in threaded fit with the external thread 34 on the fixed shaft 30; the sliding sleeve 29 is positioned on one side, away from the outer circular surface of the rotor 26, of the limiting ring 31 installed in the corresponding circular sliding groove 38; the thread lead angle of the external thread 34 on the fixed shaft 30 is equal to 45 degrees; the thread angle of the internal thread 32 on the sliding sleeve 29 is equal to 45 °.
In the invention, when the adjusting ring 16 in the adjusting device 3 loses the downward pressure on the fan blades 27, the volute spiral spring 28 drives the corresponding fan blades 27 to swing, the corresponding fixed shaft 30 is driven to rotate, and because the sliding sleeve 29 is in threaded fit with the fixed shaft 30, and the sliding sleeve 29 can only slide linearly along the axis of the corresponding circular sliding groove 38 under the action of the guide sliding block 33 and the guide sliding groove 43, and can not rotate, when the fixed shaft 30 rotates, the sliding sleeve 29 can move linearly under the action of the threads, and the moving distance of the sliding sleeve 29 is determined by the corresponding limiting ring 31; when the sliding sleeve 29 moves to contact with the corresponding limiting ring 31, the sliding sleeve 29 stops moving, the spiral spring 28 drives the fan blade 27 to swing, at the moment, the spiral spring 28 also has a certain pretightening force, a continuous swinging driving force is applied to the fan blade 27 through the pretightening force, and the fan blade 27 is prevented from shaking due to overlarge wind pressure in the rotating process through the driving force; in the present invention, after the fan stops working, a downward pressure is applied to the fan blades 27 by controlling the adjusting ring 16 in the adjusting device 3, the fan blades 27 swing from a tilted swing state to a horizontal state under the downward pressure, the fan blades 27 swing to drive the corresponding fixed shafts 30 to rotate, and the fixed shafts 30 rotate to drive the corresponding volute spiral springs 28 to return to an upward force.
If the volute spiral spring 28 is damaged and failed due to long-term use, and the downward pressure of the adjusting ring 16 is lost, the fan blades 27 cannot normally swing laterally, and normal operation is affected, therefore, the sliding sleeve 29 is arranged on the fixed shaft 30, when the rotor 26 rotates, the sliding sleeve 29 generates centrifugal force, under the centrifugal force, the sliding sleeve 29 linearly slides along the axis of the corresponding circular sliding groove 38 relative to the fixed shaft 30, the sliding sleeve 29 drives the fixed shaft 30 which is in threaded fit with the sliding sleeve 29 to rotate, the fixed shaft 30 rotates to drive the corresponding fan blades 27 to swing laterally, and similarly, when the sliding sleeve 29 contacts with the corresponding limiting ring 31, the sliding sleeve 29 stops sliding, and the fan blades 27 complete swinging, and in this state, the swinging angle of the fan blades 27 is the same as the swinging angle of the corresponding fan blades 27 which are not damaged by other volute spiral springs 28.
The lead angle of the external threads 34 on the fixed shaft 30 of the present invention is equal to 45 °; the thread lead angle of the internal thread 32 on the sliding sleeve 29 is equal to 45 degrees, under the angle, the fixed shaft 30 and the sliding sleeve 29 can smoothly slide in the process that the fixed shaft 30 rotates or the sliding sleeve 29 linearly moves, and the self-locking phenomenon caused by too large or too small thread lead angle cannot occur; in the present invention, grease is added between the sliding sleeve 29 and the fixed shaft 30 in order to further improve the degree of lubrication between the fixed shaft 30 and the sliding sleeve 29.
As shown in fig. 9 and 10, a stopper 35 for preventing the fixed shaft 30 from sliding out of the corresponding circular sliding groove 38 is mounted on all the fixed shafts 30 mounted on the rotor 26.
As shown in fig. 12, a plurality of square openings 39 are uniformly formed in the circumferential direction on the outer circumferential surface of the upper end of the rotor 26, a square mounting groove 40 is formed on the inner end surface of each square opening 39, a square guide groove 41 is formed on the inner end surface of each square mounting groove 40, and a square sliding groove 37 is formed on the inner end surface of each square guide groove 41.
As shown in fig. 7, the above-mentioned adjusting device 3 comprises an adjusting unit 6, an adjusting ring 16, and a mounting plate 13, wherein as shown in fig. 6, the mounting plate 13 is fixedly mounted on a side of the rotor 26 away from the driving motor 5 through a fixing column 12; the adjusting ring 16 is mounted on the outer circumferential surface of the rotor 26 by a sliding fit; as shown in fig. 7, a plurality of adjusting units 6 are mounted circumferentially uniformly between the adjusting ring 16 and the mounting disc 13.
As shown in fig. 7, the adjusting unit 6 includes a first electromagnet 14, a spring fixing plate 18, a first spring 19, a fixture block 21, a fixing rod 22, a second spring 23, and a second electromagnet 25, wherein the first electromagnet 14 is fixedly installed on the end surface of the mounting plate 13 close to the adjusting ring 16, the outer side of the first electromagnet 14 has a first magnetic coil, one end of the fixing rod 22 is fixedly installed on the end surface of the adjusting ring 16 close to the mounting plate 13, the spring fixing plate 18 is fixedly installed at the other end of the fixing rod 22, and the spring fixing plate 18 is made of a soft magnetic material; the guide support 20 is fixedly arranged on the outer circular surface of the rotor 26, and the guide support 20 is in sliding fit with the fixed rod 22; a first spring 19 with pretightening force is arranged between the guide support 20 and the spring fixing disc 18; the second electromagnet 25 is fixedly arranged in a square sliding groove 37 formed in the rotor 26, and a second magnetic coil 24 is arranged outside the second electromagnet 25; one end of the fixture block 21 is fixedly provided with a guide mounting ring 17, the fixture block 21 is arranged on the rotor in a sliding fit manner through the guide mounting ring 17 and a square mounting groove 40 formed in the rotor 26, and a second spring 23 with pretightening force is arranged between the guide mounting ring 17 and the corresponding square mounting groove 40; one end of the fixture block 21 is made of soft magnetic material and penetrates into the square guide groove 41 between the corresponding square chute 37 and the square mounting groove 40; the other end of the clamping block 21 penetrates through the corresponding square opening 39 to be in limit fit with the adjusting ring 16.
Before the fan blade adjusting device works, the adjusting device 3 is required to be controlled to enable the adjusting ring 16 in the adjusting device 3 to move upwards, the limitation on the fan blades 27 is removed, and the fan blades 27 are enabled to automatically swing and open under the action of the corresponding volute spiral springs 28; when the adjusting ring 16 is driven to move upwards, as shown in a in fig. 13, the first electromagnet 14 and the second electromagnet 25 are firstly electrified, when the electrification is just started, because the current is small, the adsorption force of the first electromagnet 14 on the corresponding fixing rod 22 is small, the distance for the fixing rod 22 to move upwards against the elastic force of the first spring 19 is relatively small, namely the distance for the fixing rod 22 to drive the adjusting ring 16 to move upwards is short, and under the current, the adsorption force of the second electromagnet 25 on the fixture block 21 can just overcome the pressure of the second spring 23 on the fixture block 21, as shown in b in fig. 13, the fixture block 21 moves back into the rotor 26, the pressure of the second spring 23 on the fixture block 21 is increased, and the limit state is reached, and at this time, the fixture block 21 stops moving; then, continuing to electrify, increasing the current, increasing the adsorption force of the first electromagnet 14 on the corresponding fixed rod 22, and relatively increasing the distance of the fixed rod 22 moving upwards against the elastic force of the first spring 19, that is, the fixed rod 22 drives the adjusting ring 16 to gradually move upwards along with the increasing of the current, as shown in a in fig. 14, in the moving process, the adjusting ring 16 crosses the clamping block 21 to move to the upper side of the clamping block 21, and after the adjusting ring 16 moves upwards to the limit state, the lower end surface of the adjusting ring 16 and the upper end surface of the clamping block 21 have a certain gap; when the adjusting ring 16 stops moving, the power supply is stopped, and at this time, the fixing rod 22 moves downward under the action of the first spring 19, as shown in b in fig. 14, the clamping block 21 moves outward of the rotor 26 under the action of the second spring 23, so that a certain gap is formed between the lower end surface of the adjusting ring 16 and the upper end surface of the clamping block 21, during the downward movement of the adjusting ring 16, before the adjusting ring 16 contacts with the clamping block 21, the end of the clamping block 21, which is matched with the adjusting ring 16 under the action of the second spring 23, has already moved out of the rotor 26, at this time, the clamping block 21 limits the adjusting ring 16, the adjusting ring 16 cannot continue to move downward, that is, the adjusting ring 16 loses the function of pressing down the fan blades 27, the fan blades 27 are not limited by the friction of the adjusting ring 16 during the rotation, and the fan blades 27 can normally rotate; when the fan blade 27 stops working, the controller energizes the first electromagnet 14 and the second electromagnet 25 again with a small current, as shown in fig. 15, but only the fixture block 21 needs to move back at this time, the limit on the adjusting ring 16 is lost, and the adjusting ring 16 moves down under the action of the first spring 19 to press down the fan blade 27, so that only a small current is needed; pressing the fan blades 27 by the adjusting ring 16 will make the fan blades 27 swing flat from the side-swinging state, and combine to block the air inlet of the fan, thereby preventing the dust from floating into the inner side of the fan after the fan is stopped. The rotation of the fan blades 27 is identified by the prior art, the controller of the present invention is electrically connected to an external power source, and the circuit for controlling the rotation of the motor is independent of the external power source connected to the controller.
The first electromagnet 14 and the second electromagnet 25 are connected in a brush type manner to ensure that the rotation of the rotor 26 does not affect the electricity; the base 1 is provided with a controller, and the controller controls whether the first electromagnet 14 and the second electromagnet 25 are electrified or not by identifying whether the fan blades 27 rotate or not through the sensor.
As shown in fig. 11, a plurality of escape notches 36 for preventing the fan blades 27 from interfering with the outer circumferential surface of the rotor 26 during the swing process are uniformly formed in the outer circumferential surface of the rotor 26 in the circumferential direction.
The fixed shaft 30 is detachably connected to the corresponding fan blades 27.
The fixed shaft 30 is coupled to the corresponding circular opening 42 by a bearing.
The fixing column 12 is fixedly installed on the installation plate 13 in a welding manner, and the fixing column 12 is fixedly installed on the end face of the rotor 26 far away from the driving motor 5 in a welding manner.
When the adjusting ring 16 is positioned at the uppermost end, the electrifying current of the first electromagnet 14 is larger than the electrifying current of the second electromagnet 25 when the clamping block 21 is retracted; before use, when the first electromagnet 14 and the second electromagnet 25 are powered on, the fixing rod 22 gradually moves upwards and the fixture block 21 retracts, and when the fixture block 21 retracts and completely retracts into the rotor 26, the upper end face of the adjusting ring 16 driven by the fixing rod 22 does not move to reach the lower end face position of the fixture block 21.
The specific working process is as follows: when the fan designed by the invention is used, before the fan is used, the first electromagnet 14 and the second electromagnet 25 are electrified, the clamping block 21 gradually moves back into the rotor 26 along with the increase of current, and the fixing rod 22 gradually moves upwards. When the latch 21 completely moves back into the rotator 26, the latch 21 stops moving and the second spring 23 exerts the maximum pressure on the latch 21; at this time, the attraction force of the first electromagnet 14 to the corresponding fixing rod 22 is small, the distance that the fixing rod 22 moves upward against the elastic force of the first spring 19 is relatively small, that is, the distance that the fixing rod 22 drives the adjusting ring 16 to move upward is short, the upper end surface of the adjusting ring 16 does not reach the lower end surface of the clamping block 21, along with the continuous increase of the current, the attraction force of the first electromagnet 14 to the corresponding fixing rod 22 is increased, the distance that the fixing rod 22 moves upward against the elastic force of the first spring 19 is relatively increased, that is, the fixing rod 22 drives the adjusting ring 16 to gradually move upward along with the continuous increase of the current, the adjusting ring 16 crosses the clamping block 21 to move to the upper side of the clamping block 21 in the moving process, and after the adjusting ring 16 moves upward to the limit state, a certain gap is formed between the lower end surface of the adjusting ring 16 and the upper end surface of the clamping block 21. When the adjusting ring 16 stops moving, the power supply is stopped, the fixing rod 22 moves downwards under the action of the first spring 19, the clamping block 21 moves towards the outer side of the rotor 26 under the action of the second spring 23, therefore, the lower end surface of the adjusting ring 16 and the upper end surface of the clamping block 21 have a certain gap, therefore, in the process of downward movement of the adjusting ring 16, before the adjusting ring 16 contacts the clamping block 21, the end of the clamping block 21, which is matched with the adjusting ring 16 under the action of the second spring 23, is moved out of the rotor 26, at this time, the clamping block 21 limits the position of the adjusting ring 16, the adjusting ring 16 cannot continue to move downward, that is, the adjusting ring 16 loses the function of pressing the fan blades 27, at this time, the fan blades 27 swing laterally under the action of the corresponding volute spiral spring 28, after the lateral swing is completed, the driving electric work is controlled, the driving motor 5 drives the rotor 26 to rotate, the rotor 26 drives the fan blades 27 to rotate, and the fan blades 27 rotate to dissipate heat of the computer.
When the work is stopped or the fault occurs, the controller controls the first electromagnet 14 and the second electromagnet 25 to be electrified according to the signal of the stop of the fan blade 27, but only the clamping block 21 needs to move back at this time, the limit of the adjusting ring 16 is lost, the adjusting ring 16 moves downwards under the action of the first spring 19 to press the fan blade 27 downwards, and therefore only a small current is needed; when the adjusting ring 16 presses the fan blades 27 downwards, the fan blades 27 are swung flat from a side-swinging state and combined together to shield the air opening of the fan to a certain extent, so that the fault fan is prevented from generating air flow backflow, and the air flow is prevented from being disordered to influence the heat dissipation of the system; meanwhile, the dust can be prevented from floating into the inner side of the fan after the fan breaks down to a certain extent.
The invention adopts reasonable design: after the adjusting ring 16 moves up to the limit state, the size of the gap between the lower end surface of the adjusting ring 16 and the upper end surface of the clamping block 21 and the elasticity of the first spring 19 and the second spring 23 ensure that the clamping block 21 is moved out of the rotor 26 before the adjusting ring 16 contacts the clamping block 21 after the power failure, and waits for the limit of the adjusting ring 16.
Claims (4)
1. The utility model provides an anti-return fan device that computer used, it includes the base, be fixed in the support on the base, install driving motor on the support, install the fan body on the driving motor output shaft, its characterized in that: the fan body consists of a rotor and fan blades, one end of the rotor is provided with a nested circular groove, the rotor is nested at one end of the driving motor, which is provided with an output shaft, through the nested circular groove, and the inner end surface of the nested circular groove is fixedly connected with the output shaft of the driving motor; the plurality of fan blades are uniformly arranged on the outer circular surface of the rotor in the circumferential direction, and a control device for controlling the fan blades to swing from a horizontal state to a side-swinging state is respectively arranged between each fan blade and the rotor; one end of the rotor, which is far away from the driving motor, is provided with an adjusting device which controls the fan blades to swing from a side-swinging state to a horizontal state;
a plurality of circular chutes are uniformly formed in the outer circumferential surface of the rotor in the circumferential direction, one end, close to the outer circumferential surface of the rotor, of each circular chute is provided with a through circular opening, two guide chutes are uniformly formed in the inner circumferential surface of each circular chute in the circumferential direction, and a limiting ring is mounted in each circular chute;
the control device comprises a volute spiral spring, a sliding sleeve, a fixed shaft and a guide sliding block, wherein an external thread is arranged on the outer circular surface of one end of the fixed shaft, the fixed shaft is arranged on the rotor through a circular opening formed in the rotor, and the fixed shaft is in running fit with the circular opening; one end of the fixed shaft, which is not provided with the external thread, is positioned outside the rotor and is connected with the corresponding fan blade; a volute spiral spring is arranged between the fixed shaft and the corresponding circular sliding groove, the outer end of the volute spiral spring is fixedly arranged on the inner circular surface of the corresponding circular sliding groove, and the inner end of the volute spiral spring is fixedly arranged on the outer circular surface of the fixed shaft; the volute spiral spring is positioned on one side, close to the outer circular surface of the rotor, of the limiting ring installed in the corresponding circular sliding chute; the inner circular surface of the sliding sleeve is provided with internal threads, the outer circular surface of the sliding sleeve is circumferentially and uniformly provided with two guide sliding blocks, the sliding sleeve is arranged in the corresponding circular sliding chute through the sliding fit of the two guide sliding blocks and the two guide sliding chutes, and the internal threads on the sliding sleeve are in threaded fit with the external threads on the fixed shaft; the sliding sleeve is positioned on one side, away from the outer circular surface of the rotor, of the limiting ring installed in the corresponding circular sliding chute; the thread lead angle of the external thread on the fixed shaft is equal to 45 degrees; the thread lead angle of the internal thread on the sliding sleeve is equal to 45 degrees;
a plurality of square openings are uniformly formed in the outer circular surface of the upper end of the rotor in the circumferential direction, a square mounting groove is formed in the inner end surface of each square opening, a square guide groove is formed in the inner end surface of each square mounting groove, and a square sliding groove is formed in the inner end surface of each square guide groove;
the adjusting device comprises an adjusting unit, an adjusting ring and a mounting disc, wherein the mounting disc is fixedly mounted on one side, far away from the driving motor, of the rotor through a fixing column; the adjusting ring is arranged on the outer circular surface of the rotor in a sliding fit manner; a plurality of adjusting units are uniformly arranged between the adjusting ring and the mounting disc in the circumferential direction;
the adjusting unit comprises a first electromagnet, a spring fixing disc, a first spring, a clamping block, a fixing rod, a second spring and a second electromagnet, wherein the first electromagnet is fixedly arranged on the end surface, close to the adjusting ring, of the mounting disc, a first magnetic coil is arranged on the outer side of the first electromagnet, one end of the fixing rod is fixedly arranged on the end surface, close to the mounting disc, of the adjusting ring, the spring fixing disc is fixedly arranged at the other end of the fixing rod, and the spring fixing disc is made of soft magnetic materials; the guide support is fixedly arranged on the outer circular surface of the rotor and is in sliding fit with the fixed rod; a first spring with pretightening force is arranged between the guide support and the spring fixing disc; the second electromagnet is fixedly arranged in a square sliding groove formed in the rotor, and a second magnetic coil is arranged on the outer side of the second electromagnet; one end of the fixture block is fixedly provided with a guide mounting ring, the fixture block is arranged on the rotor in a sliding fit manner through the guide mounting ring and a square mounting groove formed in the rotor, and a second spring with pretightening force is arranged between the guide mounting ring and the corresponding square mounting groove; one end of each clamping block is made of soft magnetic materials and penetrates into the corresponding square guide groove between the square sliding groove and the square mounting groove; the other end of the clamping block penetrates through the corresponding square opening to be in limit fit with the adjusting ring;
the first electromagnet and the second electromagnet are connected in a brush type electrifying mode so as to ensure that the rotation of the rotor does not influence the electrifying; the controller is arranged on the base and controls whether the first electromagnet and the second electromagnet are electrified or not by identifying whether the fan blades rotate or not through the sensor;
a plurality of avoidance notches for preventing the fan blades from interfering with the outer circular surface of the rotor in the swinging process are uniformly formed on the outer circular surface of the rotor in the circumferential direction;
the fixing column is fixedly arranged on the mounting plate in a welding mode and is fixedly arranged on the end face of one side, far away from the driving motor, of the rotor in a welding mode;
when the adjusting ring is positioned at the uppermost end, the electrifying current of the first electromagnet is larger than the electrifying current of the second electromagnet when the clamping block is retracted; when the first electromagnet and the second electromagnet are electrified before use, the fixing rod gradually moves upwards and the clamping block retracts, and when the clamping block retracts and completely retracts into the rotor, the upper end face of the adjusting ring driven by the fixing rod does not move to reach the lower end face of the clamping block.
2. A back-flow preventing fan apparatus for a computer according to claim 1, wherein: all install one on the fixed axle of installation on the above-mentioned rotor and prevent that the fixed axle roll-off corresponds spacing dish of circular spout.
3. A back-flow preventing fan apparatus for a computer according to claim 1, wherein: the fixed shaft is detachably connected with the corresponding fan blades.
4. A back-flow preventing fan apparatus for a computer according to claim 1, wherein: the fixed shaft is connected with the corresponding round opening through a bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010972349.7A CN112081766B (en) | 2019-11-25 | 2019-11-25 | Anti-backflow fan device for computer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911163637.1A CN110848158B (en) | 2019-11-25 | 2019-11-25 | Anti-backflow fan for computer |
| CN202010972349.7A CN112081766B (en) | 2019-11-25 | 2019-11-25 | Anti-backflow fan device for computer |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911163637.1A Division CN110848158B (en) | 2019-11-25 | 2019-11-25 | Anti-backflow fan for computer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112081766A CN112081766A (en) | 2020-12-15 |
| CN112081766B true CN112081766B (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010972363.7A Withdrawn CN112032084A (en) | 2019-11-25 | 2019-11-25 | Anti-return fan for computer |
| CN202010972349.7A Active CN112081766B (en) | 2019-11-25 | 2019-11-25 | Anti-backflow fan device for computer |
| CN201911163637.1A Active CN110848158B (en) | 2019-11-25 | 2019-11-25 | Anti-backflow fan for computer |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010972363.7A Withdrawn CN112032084A (en) | 2019-11-25 | 2019-11-25 | Anti-return fan for computer |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911163637.1A Active CN110848158B (en) | 2019-11-25 | 2019-11-25 | Anti-backflow fan for computer |
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| CN (3) | CN112032084A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112783219B (en) * | 2021-01-04 | 2023-03-31 | 北京电子科技职业学院 | Gas flow adjusting device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112081766A (en) | 2020-12-15 |
| CN110848158B (en) | 2020-10-13 |
| CN110848158A (en) | 2020-02-28 |
| CN112032084A (en) | 2020-12-04 |
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Effective date of registration: 20240315 Address after: Room 401, Building 2, No. 8 Xinxing 1st Road, Jiaoshe, Dongkeng Town, Dongguan City, Guangdong Province, 523000 Patentee after: Dongguan Xingliang Technology Co.,Ltd. Country or region after: China Address before: 321199 No.42, rongkou, Banqiao Village, Lingdong Township, Lanxi City, Jinhua City, Zhejiang Province Patentee before: Zhang Li Country or region before: China |