CN101270764B - Ventilation fan - Google Patents
Ventilation fan Download PDFInfo
- Publication number
- CN101270764B CN101270764B CN2008100278613A CN200810027861A CN101270764B CN 101270764 B CN101270764 B CN 101270764B CN 2008100278613 A CN2008100278613 A CN 2008100278613A CN 200810027861 A CN200810027861 A CN 200810027861A CN 101270764 B CN101270764 B CN 101270764B
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- Prior art keywords
- rotor
- ventilation fan
- motor
- impeller
- rotor shaft
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- 238000009423 ventilation Methods 0.000 title claims abstract description 37
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000000806 elastomer Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 244000248349 Citrus limon Species 0.000 description 2
- 235000005979 Citrus limon Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 241000555745 Sciuridae Species 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008261 resistance mechanism Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
A ventilation fan includes an impeller and a motor which includes a stator, a rotor and a frame. The ventilation fan is characterized in that the rotation center of the impeller is connected with the axle stretch end of the rotor in a way of threading. The rotation of the rotor is stopped at the frame when the rotor moves towards the non-transmission end direction. The motor also includes a reset structure for eliminating the reverse motion. The operation for disassembling the impeller of the designed ventilation fan is convenient, the structure is simplified, and the cost is lowered.
Description
Technical field
The present invention relates to a kind of ventilation fan, in International Patent Classification (IPC), can belong to F04D25/00.
Background technique
After most of ventilation fans (the especially exposed ventilation fan of impeller) use a period of time, need unload impeller usually and clean.Modular design for this reason (can referring to Fig. 1) is:
---rotor shaft extension end forms outside thread, an axial plane and an axial seam or a back-up ring;
---impeller is inserted in rotor shaft extension end with its rotating center through hole, and rotary stopper is in the axial plane of rotor shaft extension end, and axial limiting is in the axial seam or the back-up ring of rotor shaft extension end;
---a protecgulum screws in rotor shaft extension end outside thread with the internal thread of rotating center recess, is pressed in said axial seam or back-up ring to impeller; Protecgulum has covered the through hole of impeller, and effect attractive in appearance is also arranged.
Above structure can be referring to Fig. 1 and the relevant explanation of embodiment part.This design except that structure still than the complicacy, dismounting needs two handlings during impeller: left hand is held impeller and is stoped its rotation to block rotor shaft, and the right hand screws out protecgulum; Pull out impeller then, thus cumbersome.Especially when if ventilation fan is installed on than higher position, two handlings are difficulty more just.
Relational term can be with reference to GB/T 2900.25-94 " electrotechnical terminology electric rotating machine "
Summary of the invention
Technical problem to be solved by this invention is, proposes a kind of ventilation fan, and it is than traditional design, and the operation of dismounting impeller is more convenient, and designs simplification and reducing cost.
The technological scheme of technical solution problem of the present invention is, a kind of ventilation fan comprises impeller and motor, and motor comprises stator, rotor and support; It is characterized in that the rotating center of said impeller is threaded with rotor shaft extension end, rotor rotates when non-transmision end direction play and is hampered by support, also comprises the resetting structure of eliminating this reverse play.
Because this design; When the dismounting impeller, press to the motor non-transmision end with the handgrip impeller, promptly make rotor to non-transmision end direction play; This moment is rotary blade simultaneously; Screw thread breaks away from rotor shaft extension end under the situation of support even it is hampered by at rotor, thereby need not two handlings, and impeller is directly to be screwed to rotor shaft extension end; Can save the parts or the structures such as seam or back-up ring of protecgulum, the processing of rotor shaft extension end axial plane and axial limiting that conventional art is used for fastening impeller, thereby save cost.
Further one of design is used for inner rotor motor, and its end cap fix an axial pin, and rotor shaft fixing is pin radially, and said rotor is when non-transmision end direction play, and said axial pin contact is pin radially, thereby reaches to rotate and be obstructed.This dismounting impeller rotation is obstructed simple in structure and practical, and preferred design is in front cover.
Further two of design also are used for inner rotor motor, and to meet part mutually with the rotor shaft non-transmision end be concavo-convex cooperation to end cap thereafter.This design is also fairly simple and practical, but more compact structure.
Further three of design be said rotor when non-transmision end direction play, rotor iron core with respect to stator iron core to the non-transmision end axis of orientation to dislocation.Theoretical show, after the stator energising, the rotor of dislocation is produced axial magnetic pull it is resetted, thereby releasing is that the present invention does not increase cost and designs the most cleverly to the dynamic resistance of its rotation with experiment.This dislocation optimum design is guaranteed to have enough axial magnetic pulls to reset, and is avoided excessive starting current greater than 2mm with less than 40% of core length.
For aforementioned inner rotor motor, have under the situation of rear end cover, its further design be that said resetting-mechanism is designed to rear end cover and rotor shaft non-transmision end to meet part mutually be that a said rotor contacts compressed elastomer when non-transmision end direction play.This elastomer can be spring part or the rubber parts that an end is fixed in the cylindrical or turriform of rear end cover.
For above-mentioned design further be designed for the axial flow ventilation fan, its output is along the reverse air-flow of said rotor shaft extension end.This air-flow produces the reset mode that the active force in the opposite direction with it is used to keep rotor dexterously, in order to avoid the harmful effect of dynamic resistance mechanism.
For the further design of above-mentioned design be screw thread that the rotating center of said impeller is threadedly connected to rotor shaft extension end be right-handed thread and motor for being rotated counterclockwise, perhaps for the left-handed thread motor for turning clockwise.This cooperation makes the driving force that impeller is rotated that the impeller spiral is tightened, and significant anti-loosing effect is arranged.
Technological scheme of the present invention and effect will combine accompanying drawing to be further described in embodiment.
Description of drawings
Fig. 1 is the relevant structural representation of traditional ventilation fan;
Fig. 2 is the relevant structural representation of the present invention's the 1st embodiment's ventilation fan operating condition;
Fig. 3 is the relevant structural representation of the present invention's the 1st embodiment's ventilation fan disassembly status;
Fig. 4 is the relevant structural representation of the present invention's the 2nd embodiment's ventilation fan operating condition;
Fig. 5 is the relevant structural representation of the present invention's the 2nd embodiment's ventilation fan disassembly status.
Embodiment
Embodiment of the invention ventilation fan is on the basis of traditional ventilation fan, to improve to form.
Be illustrated in figure 1 as a traditional axial flow ventilation fan, its structure mainly comprises:
---impeller 1 and motor 2;
---motor 2 comprises stator 3, rotor 4, front housing 5 and back cabinet 6; Front housing 5 is fixed with fore bearing 7, and back cabinet 6 is fixed with rear bearing 8, and this bearing is an oil-impregnated bearing;
---stator 3 comprises stator iron core 9 and winding 10; The cylindrical of stator iron core 9 is inserted in front housing 5 and clamps with bolt with back cabinet 6 backs; The bolt clamping element is fixed in ventilation fan mounting bracket (not shown) simultaneously;
---rotor 4 comprises rotor iron core 11 and rotor shaft 12; Rotor shaft 12 is supported on fore bearing 7 and rear bearing 8; Its front end is inserted in the front limit pipe 13 of suitable length between fore bearing 7 and rotor iron core 11, between rear bearing 8 and rotor iron core 11, be inserted in the back position-limiting tube 14 of suitable length; Front limit pipe 13 is spacing with the axial float of 14 pairs of rotors of back position-limiting tube, makes rotor iron core 7 axially align stator iron core 5;
---the shaft extension end 15 of rotor shaft 12 forms dextrorotation outside thread 16 and axial plane 17, and blocks within it with axial back-up ring 18;
---impeller 1 rotating center through hole is inserted in rotor shaft extension end 15, rotary stopper in its axial plane 17 and axial limiting in axial back-up ring 18;
---the rotating center recess of protecgulum 19 has internal thread, and cover is threaded onto the outside thread 16 of rotor shaft extension end 15, is pressed in axial back-up ring 18 to impeller 1;
After the energising, rotor shaft 12 is rotated counterclockwise, the axial flow that drives impeller 1 produces backward.
The present invention's the 1st embodiment's ventilation fan such as Fig. 2 and shown in Figure 3, its improvement of (the parts meaning that all marks are identical with Fig. 1 among Fig. 2, Fig. 3 is identical) on the basis of traditional axial flow ventilation fan shown in Figure 1 comprising:
---the shaft extension end 15 ' of rotor shaft 12 ' changes the dextrorotation outside thread 16 ' of full circle into, promptly cancels former axial plane 17, and former axial back-up ring 18 is also cancelled;
---impeller 1 ' changes the structure of former protecgulum 19 and impeller 1 unification into, promptly cancels former protecgulum 19, and the rotating center recess that changes impeller 1 ' into has internal thread, and directly cover is threaded onto the outside thread 16 ' of rotor shaft extension end 15 ', and is tight until lemon;
---the end of the non-transmision end of rotor shaft 12 ' mills out one and traverses and the cross section is the groove 20 of V-arrangement along the shaft diameter direction;
---back cabinet 6 ' is that its end part in face of the non-transmision end of rotor shaft 12 ' is shaped to suitable convexity 21 of being entangled by said v-depression 20 with respect to the change of former back cabinet 6;
---back position-limiting tube 14 ' shortens 3mm than former back position-limiting tube 14.When iron core was longer, this shortening can also be some more again.
Ventilation fan after improving like this; When dismounting impeller 1 '; Press to the non-transmision end of motor 2 ' with handgrip impeller 1 ', its rotor 4 ' is to non-transmision end direction play, and the groove 20 of the end of the non-transmision end of rotor shaft 12 ' entangles the convexity 21 of back cabinet 6 '; Counter-rotating this moment impeller 1 ' can unload its back-out, and forward rotation then can be loaded onto again.Visible by Fig. 3; When loading and unloading impeller 1 '; Rotor 4 ' is to the about 3mm of non-transmision end direction play, and the iron core of rotor 4 ' and stator iron core 9 these dislocation are promptly forming the axial magnetic pull that tightens up the principle generation based on the magnetic line of force between two iron cores after the energising, it is resetted until alignment again; Said groove 20 breaks away from simultaneously with protruding 21 and removes rotation condition, and impeller 1 ' rotates under it drives.Said groove 20 also can change some circular holes that match and the cylinder that on axis one concentric circle, is uniformly distributed with into protruding 21.
The present invention's the 2nd embodiment's ventilation fan such as Fig. 4 and shown in Figure 5, its on the basis of traditional axial flow ventilation fan shown in Figure 1 (the parts meaning that all marks are identical with Fig. 1 among Fig. 4, Fig. 5 is identical) improved and comprised:
---rotor shaft 12 " shaft extension end 15 " change the dextrorotation outside thread 16 of full circle into ", promptly cancel former axial plane 17, former axial back-up ring 18 is also cancelled;
---impeller 1 ' changes the structure of former protecgulum 19 and impeller 1 unification into, promptly cancels former protecgulum 19, and the rotating center recess that changes impeller 1 ' into has internal thread, and directly cover is threaded onto rotor shaft extension end 15 " outside thread 16 ", tight until lemon;
---front housing 5 " with respect to the change of former front housing 5, be that it radially stretches out a pin 22 before the side direction in bearing;
---rotor shaft 12 " the shaft extension end in the installation position of impeller 1 ' and the position between the front housing 5 ', along diametric(al) cross one the pin 23; Pin 22 is a rotor 4 with the Design of length of pin 23 " when non-transmision end direction play, collide;
---back cabinet 6 " with respect to the change of former back cabinet 6, be that it is in face of rotor shaft 12 " the fixing cylindrical or turriform spring 24 of end part of non-transmision end, spring length initial value 6mm is 3mm after the maximum compression;
---back position-limiting tube 14 ' shortens 8mm than former back position-limiting tube 14.
Ventilation fan after improving like this; When dismounting impeller 1 ', press to motor 2 with handgrip impeller 1 ' " non-transmision end, its rotor 4 " to non-transmision end direction play; The end of the non-transmision end of rotor shaft 12 ' contacts also and then pressure spring 24; 22 rotations of pin 23 contact pins are obstructed, and counter-rotating this moment impeller 1 ' can unload its back-out, and forward rotation then can be loaded onto again.Visible by Fig. 4; When loading and unloading impeller 1 ', rotor 4 " to the about 5mm of non-transmision end direction play, rotor 4 " iron core and stator iron core 9 should dislocation at the axial magnetic pull that promptly between two iron cores, forms after the energising based on the generation of magnetic line of force receipts principle; Add the reposition force of spring 24; It is resetted until alignment again, and pin 23 disengages simultaneously with pin 22 and removes rotation condition, and impeller 1 ' is able to driven down rotation.
This embodiment is owing to increase the effect of spring, and it is more reliable than the 1st embodiment to reset, but axial float is also big.Spring 24 also can be replaced by sphere, taper shape or the Elastic Cylindrical body that the similar materials such as oil resistant rubber, nylon and polyurethane of suitable Young's modulus are made; This moment, the size of axial float can suitably shorten.
In addition; Pin 23 also can design at back cabinet 6 with the pin 22 rotation relations of being obstructed " the inboard; be it in bearing radially a side pin inwardly (preceding) stretch out, pin 23 crosses rotor shaft 12 " the position be back cabinet 6 " the inboard, promptly between rear bearing 8 and the rotor iron core 11.This structure is compact, but be not as easy to use as the former.Can also be at casing 6 " go out an axial raised flange to replace pin 22, perhaps on axle non-circular back-up ring of card to replace pin 23; Be manufacturability structure preferably.
Except that the foregoing description, the present invention can also have following embodiment:
---the support of embodiment of the invention motor is that two formulas of front and back casing with drawing and forming constitute, but also can be two formulas or the three-member type of existing technology casting back machining moulding;
---embodiment of the invention impeller is the outside thread that is threaded onto rotor shaft with inner screw sheath, but when the diameter of axle is enough big, also can form interior threaded hole in the end of axle, and impeller rotating center recess can be designed to the bolt of a protrusion, in order to be screwed into said interior threaded hole;
---the embodiment of the invention is that motor is rotated counterclockwise and makes impeller produce axial flow backward, also can design motor and turn clockwise, and makes the turning round in the opposite direction of fin of impeller simultaneously, and the air-flow that is produced can be similarly axially backward; The connecting thread of impeller and shaft extension needs the corresponding left-handed thread that changes at this moment.
---embodiment of the invention motor adopts oil-containing sliding bearing, can certainly use ball bearing, and it is the structure of transition fit with bearing inner race or bearing outer ring and bearing support but need design, so that the axial float function of embodiment of the present invention.
---the embodiment of the invention is an inner rotor motor, also can design similarly in outer rotor motor; The rotor of outer rotor motor can be moving axis or dead axle, as long as carry out respective design according to outer rotor motor existing technology structural feature and with reference to the structural feature that the foregoing description relates to main points of the present invention, also can reach similar effect.
---the motor majority of traditional ventilation fan and embodiment of the invention ventilation fan is a squirrel-cage asynchronous motor, can certainly be permanent-magnet synchronous electric motor and direct current motor etc.For squirrel cage motor, its rotor has the skewed slot of several angle usually.Through analyzing or experiment, the angle that suitably designs this skewed slot reaches and the corresponding true dip direction of sense of rotation, can further increase the axial magnetic pull of eliminating the reverse play of rotor.
Claims (8)
1. a ventilation fan comprises impeller and motor, and motor comprises stator, rotor and support; It is characterized in that the rotating center of said impeller is threaded with rotor shaft extension end, rotor rotates when non-transmision end direction play and is hampered by support, also comprises eliminating the resetting structure of rotor to non-transmision end direction play.
2. according to the said ventilation fan of claim 1, it is characterized in that: said motor is an inner rotor motor, comprises end cap; End cap is fixed an axial pin; Rotor shaft fixing one is pin radially, and said rotor is when non-transmision end direction play, and said axial pin contact is pin radially.
3. according to the said ventilation fan of claim 2, it is characterized in that: said end cap is a front cover.
4. according to the said ventilation fan of claim 1, it is characterized in that: said motor is an inner rotor motor, comprises rear end cover, and it is concavo-convex cooperation that rear end cover is met part mutually with the rotor shaft non-transmision end.
5. according to the said ventilation fan of claim 1, it is characterized in that: said rotor when non-transmision end direction play, rotor iron core with respect to stator iron core to the non-transmision end axis of orientation to dislocation.
6. according to the said ventilation fan of claim 3, it is characterized in that: comprise rear end cover, itself and rotor shaft non-transmision end to meet part mutually be a said rotor when non-transmision end direction play contact compressed elastomer.
7. according to each said ventilation fan in claim 1 to the claim 6, it is characterized in that: said impeller is the axial-flow blower of output along the rightabout air-flow of said rotor shaft extension extreme direction.
8. according to each said ventilation fan in claim 1 to the claim 6; It is characterized in that: the screw thread that the rotating center of said impeller is threadedly connected to rotor shaft extension end be right-handed thread and motor for being rotated counterclockwise, perhaps for the left-handed thread motor for turning clockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100278613A CN101270764B (en) | 2008-04-30 | 2008-04-30 | Ventilation fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100278613A CN101270764B (en) | 2008-04-30 | 2008-04-30 | Ventilation fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101270764A CN101270764A (en) | 2008-09-24 |
| CN101270764B true CN101270764B (en) | 2012-04-25 |
Family
ID=40004941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100278613A Expired - Fee Related CN101270764B (en) | 2008-04-30 | 2008-04-30 | Ventilation fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101270764B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2149502Y (en) * | 1993-03-16 | 1993-12-15 | 慈溪市海佳电器总厂 | Blade mounting |
| CN2326764Y (en) * | 1997-11-28 | 1999-06-30 | 广东美的集团股份有限公司 | Connection mechanism for feathering fan air-ducting impeller |
| CN201265560Y (en) * | 2008-05-14 | 2009-07-01 | 江门市金羚排气扇制造有限公司 | Domestic ventilating fan |
-
2008
- 2008-04-30 CN CN2008100278613A patent/CN101270764B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2149502Y (en) * | 1993-03-16 | 1993-12-15 | 慈溪市海佳电器总厂 | Blade mounting |
| CN2326764Y (en) * | 1997-11-28 | 1999-06-30 | 广东美的集团股份有限公司 | Connection mechanism for feathering fan air-ducting impeller |
| CN201265560Y (en) * | 2008-05-14 | 2009-07-01 | 江门市金羚排气扇制造有限公司 | Domestic ventilating fan |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平10-61595A 1998.03.03 |
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| Publication number | Publication date |
|---|---|
| CN101270764A (en) | 2008-09-24 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Granted publication date: 20120425 |