CN1205399A - Motor-driven blower and method of manufacturing impeller for motor-driven blower - Google Patents
Motor-driven blower and method of manufacturing impeller for motor-driven blower Download PDFInfo
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- CN1205399A CN1205399A CN 98115481 CN98115481A CN1205399A CN 1205399 A CN1205399 A CN 1205399A CN 98115481 CN98115481 CN 98115481 CN 98115481 A CN98115481 A CN 98115481A CN 1205399 A CN1205399 A CN 1205399A
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Abstract
Reduction of air resistance which acts on the conventional motor-driven blower is limited because crushed protrusions are formed on the surface of the plate of the impeller of the conventional motor-driven blower, and this air resistance is a significant impediment to an increase of the operating speed of the motor-driven blower. Thus, an impeller is provided which comprises a front plate having a suction opening, a back plate disposed opposite to the front plate, and a plurality of blades disposed between the front plate and the back plate. At least either the front plate or the back plate is formed integrally with the blades.
Description
The present invention relates to a kind of electric fan that is used for vacuum dust collector, and the method that is used to make the impeller of this electric fan.
The impeller of one traditional electric fan comprises: one is arranged on its central part and has the header board of a pump port; The one back plate that is oppositely arranged with described header board; And be arranged on header board and the back all blades between the plate.Be equipped with several on each blade and be used to insert projection fixedly to be out of shape, these projectioies are inserted in the plurality of square holes that is formed in header board and the back plate, each projection is crushed from header board and the part that the back plate outwards protrudes out, thereby fixes each vanes fixed in header board and back plate by inserting.All members of impeller all are to make with aluminum alloy.The impeller that will be assembled into like this with a screw is fastened on the shaft of motor, and covers a fan casing above impeller, has so just formed an electric fan.
The present invention has designed a kind of electric fan that is intended to be used for a novel evacuated vacuum cleaner, and this blower fan can be worked under higher operating rate, thereby can produce bigger suction air quantity expeditiously.
Because traditional electric fan is to insert fixing will forming from header board and the convex portion flaser structure that the back plate protrudes out by mat as described above, thereby the outer surface protrusion of part from header board and back plate that be crushed of each projection.When the impeller high speed rotating, be sizable with each of impeller relative resistance of air of the motion of part that is crushed, this resistance of air can hinder the raising of electric fan operating rate.
For example advise a kind of technology that is used to address this problem among the JP-A No.1-310198, used the end wedge angle that inserts each convex portion of fixing and being crushed to become slick and sly, used the relative resistance of air of motion partly that is crushed that reduces with each projection.
Though the technology of advising in JP-A No.1-310198 uses the end wedge angle that inserts each convex portion of fixing and being crushed to become slick and sly, use the relative resistance of air of motion of part that is crushed that reduces with each projection, but the part that is crushed is retained in still on the outer surface of header board and back plate.Therefore, to resistance of air reduce to be to have certain limit, the part that is crushed is a very big obstacle for the operating rate that increases electric fan.
The speed of electric fan increases the stress that must make in the impeller and increases.Thereby the necessary rigidity that increases impeller.Each member of conventional impellers is fixing and fastening mutually by inserting, and is lower than the intensity of blade and plate by the join strength that inserts each member of fixing and forming.Therefore, the rigidity that mat inserts the impeller of fixing assembling and constituting is not very high, so the increase of wheel speed is restricted.
The speed of electric fan increases the load that must make on the motor rotary shaft and increases.Therefore, must reduce to be applied to load on the motor rotary shaft by the weight that reduces impeller made of aluminum.
Therefore, one object of the present invention is to address the above problem, and provide a kind of electric fan that is provided with an impeller, described impeller can reduce and its relative resistance of air that rotatablely moves, has stronger rigidity, and can reduce to drive load on the shaft of motor of this impeller rotation, and can under higher operating rate, work.The present invention also provides a kind of method that is used to make a kind of like this impeller of electric fan.
For achieving the above object, according to a first aspect of the invention, provide a kind of electric fan, having comprised: a motor that is covered by a case cover; One is fixed in the impeller in the rotating shaft that is included in the motor; Be arranged on all stationary guide blades in impeller downstream side; And one cover cover the fan casing of impeller and all stationary guide blades; Wherein, impeller comprises: a header board with a pump port, one and the back plate that is oppositely arranged of header board, be arranged on a plurality of blades between header board and the back plate; And, be that one of front or rear panel are integrally formed with all blades at least.
According to a second aspect of the invention, impeller comprises: a header board; The one back plate that is oppositely arranged with header board; Be arranged on a plurality of blades between header board and the back plate; Wherein, be that one of front or rear panel are integrally formed with all blades at least, with on the surface of all another plates of blade-shaped all-in-one-piece do not forming a brazing metal layer, this another plate is to be welded in all blades by this brazing metal layer.
According to the present invention, the impeller formula structure that forms as one, it was in the past not the sort of because of inserting the fixing projection that is crushed that forms.Therefore, impeller of the present invention can not be subjected to resistance of air as the impeller that the projection of flattening is arranged, and can not produce noise as the impeller that the projection of flattening is arranged.An electric fan that is provided with impeller of the present invention can be worked under very high operating rate, thereby can improve the pumping efficiency of vacuum dust collector.
These and other purpose of the present invention will become clear by the description of hereinafter being done in conjunction with the accompanying drawings.
Fig. 1 is the exploded perspective view according to an impeller of the present invention;
Fig. 2 is the partial sectional view according to the amplification of an impeller of a preferred embodiment of the present invention;
Fig. 3 is the partial sectional view according to the amplification of an impeller of a preferred embodiment of the present invention;
Fig. 4 is the partial sectional view according to the amplification of an impeller of a preferred embodiment of the present invention;
Fig. 5 is the exploded perspective view according to an impeller of the present invention;
Fig. 6 is the stereogram according to a vacuum dust collector of the present invention;
Fig. 7 is the longitudinal section according to an electric fan of the present invention;
Fig. 8 is the stereogram according to an impeller of the present invention;
Fig. 9 is the plane view according to an impeller of the present invention;
Figure 10 is according to the plane view of an impeller of the present invention;
Figure 11 is the longitudinal section according to an impeller of the present invention;
Figure 12 is the exploded perspective view according to an impeller of the present invention;
Figure 13 is the longitudinal section according to an impeller of the present invention;
Figure 14 is the longitudinal section according to an impeller of the present invention;
Figure 15 is the exploded perspective view according to an impeller of the present invention;
Figure 16 is the exploded perspective view according to an impeller of the present invention;
Below in conjunction with each accompanying drawing each preferred embodiment of the present invention is described.
Fig. 6 relates to the stereogram of a vacuum dust collector of a preferred embodiment of the present invention.
Referring to Fig. 6, wherein show a body of dust collector 601, it is provided with several interior arrangements integratedly, and comprises: an electric fan; One flexible pipe 602, one end are connected in a pump port that is formed in the body of dust collector 601; One flexible pipe handle 603; One is connected in the extension rod 604 of flexible pipe 602 the other ends (flexible pipe handle 603); One is connected in the pump port 605 of extension rod 604; One is attached to the switch operation device 606 of flexible pipe handle 603; One is attached to the first infrared light emission device 607 of flexible pipe handle 603; One is attached to the second infrared light emission device 608 of flexible pipe handle 603; One is attached to the infrared receiver 609 of dust removal apparatus 601 upper walls; An and ceiling board 610.
The operation of the vacuum dust collector relevant with the embodiment of the invention is described below in conjunction with Fig. 6.
The operator presses a switch button that is arranged in the switch operation device 606.Subsequently, send infrared signal by the first infrared reflection device 607 and the second infrared reflection device 608 corresponding to the code of this operation button switch.Under common user mode, the first infrared reflection device 607 is vertically upward.Therefore, the ceiling board or the infrared signal on the wall that are sent and be mapped to the room by the first infrared reflection device 607 will reflect there, and fall on the infrared receiver 609.The second infrared reflection device 608 is inclined relative to horizontal downwards.Therefore, the infrared signal that is sent by the second infrared reflection device 608 is directly fallen on the infrared receiver 609.Infrared signal is received by the infrared ray electric installation (not shown) that is arranged on the body of dust collector 601, and a control circuit (not shown) can be controlled the operation of body of dust collector 601 according to these infrared signals.
The structure that is installed in the electric fan in the body of dust collector 601 is described below in conjunction with Fig. 7.
One electric fan 701 comprises a motor 717 and a blower fan 718.Motor 717 comprises: a housing 702; One is fixed in the stator 703 of housing 702; One is bearing in the bearing 704 that is positioned on the housing 702 and 719 rotor shaft 705; One is fixedly mounted on the rotor 706 on the rotor shaft 705; One is fixedly mounted on the commutator 707 on the rotor shaft 705; One is electrically connected in the brush 708 of described commutator 707; And one be used to the brush bearing 709 that keeps brush 708 and be connected in housing 702.
The circumference of commutator 707 is provided with several commutator bars, and they are connected in the coil that is wound on the rotor 706.
Brush 708 is fixed in the brush bearing 709, and is compressing commutator 707, and by a spring 710 and commutator 707 sliding contacts.One electric lead 711 that is electrically connected in brush is electrically connected a brush 708 and an outer electrode.The terminal (not shown) that electric lead 711 and is attached to brush bearing 709 links to each other.One end frame 720 is attached to housing 702, uses that blower fan 718 is connected in motor 717.
End frame 720 is provided with an air inlet 716, and the air that is blowed by blower fan 718 can flow to motor 717 by this inlet.End frame 720 is provided with several fixing guide blades 714.An impeller 712 that is arranged on fixed guide blade 714 upstream sides is anchored on rotor shaft 705 by a nut 713.One case 715 is placed forcibly and is fixed in end frame 720, is provided with a pump port 721 in the central part of this case
When motor is driven, rotor 706 rotation, the impeller 712 coaxial with rotor 706 is driven to rotate, thereby by the pump port 721 of fan casing 715 air sucked.Air stream flows to motor 717 by air inlet 716 subsequently through impeller 712 and fixed guide blade 714.
The structure of impeller 712 is described below in conjunction with Fig. 8 and 9.
Fig. 8 and 9 is respectively stereogram and the planimetric map according to the impeller 712 of the embodiment of the invention.
Referring to Fig. 8 and 9, impeller 712 comprises: a header board 101 which is provided with a pump port 801; One is positioned at header board below and back on the other side plate 102; Be folded in all blades 103 between header board 101 and the back plate 102.As shown in Figure 9, all blades 103 are crooked.Header board 101, back plate 102 and all blades 103 define a plurality of air outlet slits 802.When impeller 712 rotations, the air that is inhaled into impeller through pump port 801 flows to motor so that motor cools off from air outlet slit 802, and discharges by the floss hole of body of dust collector.
Impeller 712 needs high speed rotating to produce higher aspiration.Impeller must be light-duty, and the resistance of air that acts on impeller 712 must be smaller, so that make the impeller can high speed rotating.Describe a kind of like this structure below in conjunction with Fig. 1 to 4, it can form lightweight construction impeller 712 effectively, and can reduce to act on the resistance of air of impeller 712.
Fig. 1 is the exploded perspective view according to the impeller 712 of the embodiment of the invention.
As shown in Figure 1, header board 101 and all blades 103 are the structures that form as one.
In this embodiment, the integral structure of header board 101 and all blades 103 is to make with the magnesium alloy of the AZ91D grade of ASTM (american society for testing and materials) defined.Magnesium alloy AZ91D comprises the Al of 8.3-9.7wt.%, the Zn of 0.35-1.0wt.% and the Mn of 0.15-0.50wt.%, and it has very high moldability, and is the highly purified alloy of a kind of Cu of not having, Ni and Fe content.
In this embodiment, the integral structure of header board 101 and all blades 103 also can replace the magnesium alloy of AZ91D grade to make with the magnesium alloy of the AM60B grade of U.S. ASTM standard defined, magnesium alloy AM60B comprises the Al of 5.5-6.5wt.%, the Zn of 0.22wt.% and the Mn of 0.24-0.6wt.%.
The proportion of magnesium alloy is about 1.8g/cm
3, approximately be that proportion is 2.7g/cm
3Aluminum alloy 2/3.
Describe a kind of will back plate 102 being linked to below in conjunction with Fig. 2 and form method on all blades 103 of one with header board 101.
This embodiment adopts electroplating technology to form the brazing metal layer on the internal surface of back plate 102.The step of described electroplating technology comprises: degreasing, washing, plating, washing and drying.Utilize the suitable Electrolytic solution of suitable temperature, and in one section suitable electroplating time, apply electric current, just can on the plate 102 of back, form required zinc brazing metal layer 201 with suitable current density.
To remain coaxial adjacency state with header board 101 and the back plate 102 that all blades 103 are wholely set, and they are not applied any pressure, applied pressure can not make header board 101, back plate 102 and 103 distortion of all blades in other words, with header board 101, back plate 102 and all blades 103 under the proper temperature that is lower than their fusing points, in one section reasonable time, heat, thereby by soldering back plate 102 is linked to all blades 103.
When heating in one section appropriate time with a suitable temperature, 201 fusing of brazing metal layer are also infiltrated back plate 102 and all blades 103, use forming all reacting parts 202, and these reacting parts are linked to all blades 103 firmly with back plate 202.
In this embodiment, because back plate 102 is to be linked to all blades 103 by soldering, so on the outer surface of back plate 103, do not exist because of inserting the fixing projection that is crushed that forms.
Though this embodiment adopts electroplating technology to form brazing metal layer 201 on the plate 102 of back, brazing metal layer 201 also can form by the combination of some technology in physical vapor deposition technology, chemical evaporation process, ion plating process, spray technology or these technology.
Though what this embodiment adopted is the brazing metal layer of zinc, also can be used as brazing material with the low melting metal of for example Sn or Pb and so on and the low-melting alloy that is main component with such metalloid.
Preferable low-melting alloy is Zn-Sn alloy, Zn-Pb alloy, Sn-Pb alloy, Zn-Mg alloy and Zn-Al alloy.
Though this embodiment has adopted the aluminum alloy of A5052 grade (JIS) to form back plate 102, but Al-Mn alloy (series 3000, JIS), Al-Si alloy (series 4000, JIS), Al-Cu-Mg alloy (series 2000, JIS), Al-Mg-Si alloy (series 6000, JIS) and the Al-Zn-Mg alloy (series 7000 JIS) all is the material that can be used for forming back plate 102.
In this embodiment, header board 101 and all blades 103 of impeller 712 are to make with magnesium alloy, and the back plate 102 of impeller 712 is that the proportion aluminum alloy bigger than magnesium alloy made, and impeller 712 is installed on the shaft of motor, and back plate 102 is on that side of motor.Therefore, can suppress the disturbance of the rotor shaft that causes because of load skewness on it, and can reduce noise, reduce the wearing and tearing of carbon brush, prolong the working life of electric fan.
Though this embodiment adopts the back plate 102 of aluminum alloy, also can make back plate 102 with the magnesium alloy materials identical with forming header board 101 and all blades 103.
Below in conjunction with Fig. 2 the second embodiment of the present invention is described.
Fig. 2 is the amplification partial sectional view of an impeller of second embodiment of the invention.
This embodiment's impeller 712 and first embodiment's impeller 712 are similar, and it has header board 101 and the blade 103 of being made and formed integral structure by magnesium alloy.
The magnesium alloy that this embodiment adopted is the AZ91D grade of ASTM standard code of the U.S. or the magnesium alloy of AM60B grade.Header board 101 and all blades 103 form an integral structure by injection molding process.
In this embodiment, the brazing metal layer 201 on the back plate 102 is to form like this, promptly covers back plate 102 with the magnesium alloy brazing metal layer of AZ91D grade and by hot-rolling pressurization binding technology.
Link in the technology in the hot-rolling pressurization, with the proper temperature that is lower than back plate 102 and a tinsel (zinc metal sheet) fusing point respectively back plate 102 and this tinsel are heated, use and form brazing metal layer 201, back plate 102 and this tinsel is stacked, between the roller of a pair of rolling, stacked back plate 102 and tinsel are suppressed, just can on the plate 102 of back, be formed brazing metal layer 201 with desired thickness.Brazing metal layer 201 also can form with another kind of method, even between stacked back plate 102 and the roller of tinsel by a pair of rolling, apply an electric current at these pair of rollers two ends, and between paired roller, back plate 102 and the tinsel that is used to form brazing metal layer 201 are suppressed, and back plate 102 and tinsel are heated to the temperature that is lower than back plate 102 and tinsel fusing point respectively.When adopting this method, make back plate 102 and tinsel by paired rolling roller before, need not they are heated, they can heat by the electric current that puts on paired rolling roller two ends.
The header board 101 that is integrally formed with all blades 103 is kept coaxial adjacency state with the back plate 102 that is provided with brazing metal layer 201, and they are not applied any pressure, applied pressure can not make header board 101, back plate 102 and 103 distortion of all blades in other words, header board 101, back plate 102 and all blades 10 are being heated in one section appropriate time under the temperature that is lower than their fusing points, thereby with brazing metal layer 201 back plate 102 is being linked to all blades 103 by soldering.
When heating in one section appropriate time with a suitable temperature, 201 fusing of brazing metal layer are also infiltrated back plate 102 and all blades 103, use forming all reacting parts 202, and these reacting parts are linked to all blades 103 firmly with back plate 202.
In this embodiment, because back plate 102 is to be linked to all blades 103 by soldering, so on the outer surface of back plate 103, do not exist because of inserting the fixing projection that is crushed that forms.Therefore, it is less to act on the resistance of air of back plate 102 outer surfaces.
Though what this embodiment adopted is zinc brazing metal layer, also can be used as brazing material with the low melting metal of for example Sn or Pb and so on and the low-melting alloy that is main component with such metalloid.Preferable low-melting alloy is Zn-Sn alloy, Zn-Pb alloy, Sn-Pb alloy, Zn-Mg alloy and Zn-Al alloy.
Though this embodiment has adopted the magnesium alloy of AZ91D grade to form back plate 102, but the magnesium alloy of the AM60M grade of magnesium alloy of the AM31B grade of U.S. ASTM standard (Al that contains about 2.8wt.%, the approximately Zn of 0.87wt.% and the approximately manganese of 0.41wt.%) or ASTM standard also can be used to form back plate 102.
Below in conjunction with Fig. 3 the third embodiment of the present invention is described.
Fig. 3 is the partial sectional view according to the amplification of an impeller 712 of third embodiment of the invention.
This embodiment's impeller 712 is similar with aforementioned two embodiments' impeller 712, and it has header board 101 and all blades 103 of being made and formed integral structure by magnesium alloy.
The magnesium alloy that this embodiment adopted is the AZ91D grade of ASTM standard code of the U.S. or the magnesium alloy of AM60B grade.Header board 101 and all blades 103 form an integral structure by injection molding process.
All blades 103 are provided with a plurality of fixed lobes 301.Back plate 102 is to make with the Al-Mg alloy of A5052 grade (JIS).Back plate 102 is provided with a plurality of holes 302, to admit fixed lobe 301 respectively on corresponding to the position of each fixed lobe 301 of all blades 103.Preferably, the height of each fixed lobe 301 equals the thickness of back plate 102.
To describe a kind of being used for below back plate 102 will be anchored on the method for the integral structure of header board 101 and all blades 103.
Each fixed lobe 301 that forms all blades 103 of one with header board 101 is inserted in the hole 302 of back plate 102, by the projection 301 of patchhole 302 being carried out satisfying the spot welding (being resistance welding) of conditions such as relevant welding current, weld interval, electrode quality, electrode diameter, just can form reacting part 303, thereby back plate 102 is connected in firmly the integral structure of header board 101 and all blades 103.Back plate portion around the part of fixed lobe and the hole 302 melts in welding process.
Combination with laser welding process, electro-beam welding process or laser welding process and electro-beam welding process can replace spot-welding technology back plate 102 to be connected in the integral structure of header board 101 and all blades 103.
Though this embodiment has adopted the aluminum alloy of A5052 grade (JIS) to form back plate 102, but Al-Mn alloy (series 3000, JIS), Al-Si alloy (series 4000, JIS), Al-Cu-Mg alloy (series 2000, JIS), Al-Mg-Si alloy (series 6000, JIS) and the Al-Zn-Mg alloy (series 7000 JIS) all is the material that can be used for forming back plate 102.
In this embodiment, all blades 103 and back plate 102 weld together, and do not exist any because of inserting the fixing projection that is crushed that is used for back plate 102 is anchored on all blades 103 that forms on the outer surface of back plate 102.Therefore, it is less to act on outside header board 101 and the back plate 102 lip-deep resistance of air.
Below in conjunction with Fig. 4 the fourth embodiment of the present invention is described.
Fig. 4 is the partial sectional view according to the amplification of an impeller 712 of fourth embodiment of the invention.
This embodiment's impeller 712 is similar with aforementioned each embodiment's impeller 712, and it has header board 101 and the blade 103 of being made and formed integral structure by magnesium alloy.
The magnesium alloy that this embodiment adopted is the AZ91D grade of ASTM standard code of the U.S. or the magnesium alloy of AM60B grade.Header board 101 and all blades 103 form an integral structure by injection molding process.
All blades 103 are provided with a plurality of fixed lobes 301.Back plate 102 is to make with the Al-Mg alloy of A5052 grade (JIS).Back plate 102 is provided with a plurality of holes 302, to admit fixed lobe 301 respectively on corresponding to the position of each fixed lobe 301 of all blades 103.On the internal surface of back plate 102, be formed with a zinc brazing metal layer 401.
This embodiment adopts electroplating technology to form the brazing metal layer on the internal surface of back plate 102.The step of described electroplating technology comprises: degreasing, washing, plating, washing and drying.Utilize the suitable Electrolytic solution of suitable temperature, and in one section suitable electroplating time, apply electric current, just can on the plate 102 of back, form required zinc brazing metal layer 401 with suitable current density.
To describe a kind of being used for below back plate 102 will be anchored on the method for the integral structure of header board 101 and all blades 103.
Each fixed lobe 301 that forms all blades 103 of one with header board 101 is inserted into the hole 302 of back plate 102 from that side of brazing metal layer 401.Under the temperature of the fusing point that is lower than described integral structure and back plate 102, in required heating time, they are heated, thereby utilize brazing metal layer 401 described integral structure and back plate to be linked mutually with soldering.Under suitable temperature, in needed time, heat, just can make brazing metal layer 401 infiltrate integral structure and form reacting part 402 with back plate 102.
, pressure temperature required by a tool and the heat pressing process of heating time make the partial melting around the hole that is inserted with fixed lobe 301 302 of back plate 102, thereby form the reacting parts 403 that integral structure and back plate 102 are linked mutually.Be heated and during pressurized, back plate 102 in the hole 302 on every side part and the part of fixed lobe 301 will melt.
Though be to utilize soldering in this embodiment and then to be hot pressing link integral structure 804 and back plate 102 mutually, hot pressing also can be carried out before soldering.
Though this embodiment adopts electroplating technology to form brazing metal layer 401 on the plate 102 of back, brazing metal layer 401 also can form by the combination of some technology in physical vapor deposition technology, chemical evaporation process, ion plating process, spray technology or these technology.
Though what this embodiment adopted is the brazing metal layer of zinc, also can be used as brazing material with the low melting metal of for example Sn or Pb and so on and the low-melting alloy that is main component with such metalloid.Preferable low-melting alloy is Zn-Sn alloy, Zn-Pb alloy, Sn-Pb alloy, Zn-Mg alloy and Zn-Al alloy.
Though this embodiment adopts heat pressing process that the integral structure of header board 101 and all blades 103 is linked mutually with back plate 103, it also is feasible adopting some process combined in laser welding process, electro-beam welding process, resistance welding or these technology.
Though this embodiment has adopted the aluminum alloy of A5052 grade (JIS) to form back plate 102, but Al-Mn alloy (series 3000, JIS), Al-Si alloy (series 4000, JIS), Al-Cu-Mg alloy (series 2000, JIS), Al-Mg-Si alloy (series 6000, JIS) and the Al-Zn-Mg alloy (series 7000 JIS) all is the material that can be used for forming back plate 102.
In this embodiment because all blade 103 and back plate 102 weld together, so do not exist on the outer surface of back plate 102 any because of insert fixing forms be used for after plate 102 be anchored on the projection that is crushed of all blades 103.Therefore, it is less to act on outside header board 101 and the back plate 102 lip-deep resistance of air.
In aforesaid first to fourth embodiment, header board 101 and all blades 103 formula structure that forms as one.As shown in Figure 5, all blades 103 also can with the back plate 102 formula structure that forms as one, header board then can adopt any connecting means described in aforementioned first to fourth embodiment to be connected in all blades 103.
In first to fourth embodiment of the present invention, impeller is light-duty, the resistance of air that acts on the plate surface is reduced, when consumed power 1000W, the impeller that can make electric fan is 45,000 to 50, rotation in the speed range of 000rpm, and make vacuum dust collector that 550W or higher pumping power be arranged.
Then, will injection-molded structure according to preferred embodiment be described in conjunction with Figure 10 and 11.
In this preferred embodiment, utilize stamping press or machine cut operation internal diameter and the coaxial processing of external diameter with a header board 101, so that modifying factor die stress and the vibration or bending or the similar phenomenon that on the interior external diameter of header board 101, produce, and improve its coaxial precision.By above configuration, can reduce the amount of unbalance of the impeller 712 that produces because of molded operation, thereby improve its balance quality.
Particularly, the electric fan 701 that is used for electric dust collector is under the situation of high speed rotating, it can not only reduce vibration noise effectively, and can improve the validity of peripheral dimension in the impeller 712, thereby make its combination size comparatively stable, and then reduce the disturbance of aerodynamic quality aspect with respect to fan casing 715 or stationary guide blades 714.
In this preferred embodiment, once formed the door 1002 of a film shape at a molten metal opening 1001 places of interior all sides of pump port 801, so that make molten metal flow to header board 101 equably along circumference.
In addition, be provided with two molten metals deposit devices in its periphery, not enough in order to prevent molten metal amount when the filling.Though for the acquisition stabilized quality is necessary, make the back at product has not just needed these deposit devices, thereby they should be removed after molded operation when carrying out metal injection-molding.
In Figure 11, remove each indicated internal and external circumferential part of arrow.In this preferred embodiment, on the inner periphery and the outer periphery of header board 101, arrange molten metal opening 1001 or prevented the molten metal deposit device 1003 that charging quantity is not enough, when aforesaid inner periphery and the outer periphery are carried out post-production, they can be removed, thereby process step does not increase.
As another preferred embodiment, the stereogram shown in Figure 12 is represented the state that back plate 102 and all blades 103 are integrally moulded.In this case, not only can improve balance quality or aerodynamic performance as described above, and can make it form structure shown in Figure 13 and 14.That is to say, in Figure 13, do the most weak interior circumferential portion of rigidity of back plate 102 thicker, to increase its rigidity.Rotating machinery for a high speed is effective especially like this.
In Figure 13, those impeller 712 parts of the air flow passage of close pump port 801 upwards protrude out, and with flowing of reinforcement ingress, and then strengthen aerodynamic performance.
In addition, in Figure 14, overhang is extended on the opposite direction of rotating shaft 705, thereby has formed a standing part that is used for rotating shaft 705, is used for fixing another independent hub spare of this member in the prior art thereby can not adopt.
In Figure 15 and 16, the thickness of blade 103 changes, to form a so-called impeller shape.In example shown in Figure 15, arrange each fixed claw that is used for header board 101, and in example shown in Figure 16, reduced the thick portion of blade 103, obtaining a comparatively average thickness, and improve mold formed ability.
Because blade 103 and the plate that matches are integrally formed, so that two above-mentioned examples become possibility.Compare than the situation that sheet member forms blade and plate with utilization in the aforementioned prior art, the degrees of freedom when these two examples can make design increases, and owing in impeller 712, can obtain best mobile adaptability, thereby also improved aerodynamic performance.
In above-mentioned preferred embodiment, header board 101 and blade 103 are integrally formed with magnesium alloy.This magnesium alloy is a U.S. ASTM AZ91D type.The AZ91D alloy contains the aluminium of 8.3-9.7wt.%, the zinc of 0.35-1.0wt.% and the manganese of 0.15-0.50wt.%, and its mold formed characteristic good, and be a kind of highly purified product, the inclusion content of copper wherein, nickel and iron is very limited.
In this preferred embodiment, though the integral structure of header board 101 and blade 103 is to make with the AZ91D magnesium alloy, but it also is comparatively ideal adopting the AM60B magnesium alloy of U.S. ASTM standard, this kind alloy contains the aluminium of 5.5-6.5wt.%, the zinc of 0.22wt.%, and the manganese of 0.24-0.6wt.%.
Proportion (the g/cm of magnesium alloy
3) approximately be 1.8, thereby for the aluminum alloy that proportion is 2.7, can obtain a kind of lighter product.
In addition, in this preferred embodiment, form though back plate 102 is the aluminum alloys with A5052 (JIS standard), any of Al-Mn alloy (series 3000), Al-Si alloy (series 4000), Al-Cu-Mg alloy (series 2000), Al-Mg-Si alloy (series 6000) and Al-Zn-Mg alloy (series 7000) all is the material of plate 102 after can being used for forming.
As mentioned above, according to the present invention, in impeller 712, adopt magnesium alloy can make the weight saving of impeller 712, and then the load that puts on rotating shaft is reduced.
In addition, according to the present invention, integrally formed impeller can be eliminated each fastening projection, thereby can reduce the resistance of air that causes because of these fastening projectioies and noise etc.
In addition, according to the present invention, after mold formed operation, by an additional punching press or machine cut operation or similar operation, can carry out coaxial processing to the interior external diameter of header board 101, so just can proofread and correct because of reversing and bending that die stress produces on interior outer radius portion, and improve coaxial precision.By aforesaid configuration, can reduce the amount of unbalance of the impeller 712 that produces because of mold formed operation, thereby improve balance quality.Particularly under the situation of the electric fan high speed rotating that is used for electric dust collector or similar products, utilize the present invention not only can reduce vibration noise efficiently, and can improve the dimensional accuracy of excircle within the impeller 712, combination size between fan casing and the stationary guide blades is stablized, and the disturbance of eliminating the aerodynamic performance aspect.In addition, on the inner periphery and the outer periphery of header board 101, arrange the molten metal opening that molded operation is required respectively or be used to prevent the molten metal deposit device that the added metal amount is not enough, they can carry out being removed in the post-production to outer radius portion in aforesaid, thereby can not increase process step.
Should be appreciated that above description is only made preferred embodiment of the present invention, person skilled in the art can also make many variations and change under the situation that does not depart from the present invention's spirit and protection domain.
Claims (11)
1. electric fan comprises: a motor that is covered by a case cover; One is fixedly installed in the impeller in the rotating shaft that is included in the described motor; Be arranged on all stationary guide blades in described impeller downstream side; And one cover cover the fan casing of described impeller and described all stationary guide blades;
Wherein, described impeller is to make with a magnesium alloy.
2. electric fan comprises: a motor that is covered by a case cover; One is fixedly installed in the impeller in the rotating shaft that is included in the described motor; Be arranged on all stationary guide blades in described impeller downstream side; And one cover cover the fan casing of described impeller and described all stationary guide blades;
Wherein, described impeller comprises: a header board with a pump port, one and the back plate that is oppositely arranged of described header board, be arranged on a plurality of blades between described header board and the described back plate; And, be that one of described header board or described back plate are integrally formed with described all blades at least.
3. electric fan comprises: a motor that is covered by a case cover; One is fixedly installed in the impeller in the rotating shaft that is included in the described motor; Be arranged on all stationary guide blades in described impeller downstream side; And one cover cover the fan casing of described impeller and described all stationary guide blades;
Wherein, described impeller comprises: a header board with a pump port, one and the back plate that is oppositely arranged of described header board, be arranged on a plurality of blades between described header board and the described back plate; And, be that one of described header board or described back plate are integrally formed with a kind of magnesium alloy with described all blades at least.
4. electric fan as claimed in claim 3 is characterized in that, described header board and all blades are to form an integral structure with a kind of magnesium alloy, and described back plate is to make with a kind of aluminum alloy.
5. an impeller comprises: a header board; The one back plate that is oppositely arranged with described header board; Be arranged on a plurality of blades between described header board and the described back plate;
Wherein, be that one of described header board or described back plate are integrally formed by injection molding process, extrusion process, milling process or pressing process with described all blades at least.
6. an impeller comprises: a header board; The one back plate that is oppositely arranged with described header board; Be arranged on a plurality of blades between described header board and the described back plate;
Wherein, be that one of described header board or described back plate are integrally formed with described all blades at least, with on all another plates of blade-shaped all-in-one-piece do not forming a brazing metal layer, described another plate is to be welded in described all blades by this brazing metal layer.
7. impeller as claimed in claim 6 is characterized in that, the process of surface treatment that is used for forming the brazing metal layer is the combination of electroplating technology, evaporation process, ion plating process, spray technology or some above-mentioned technology.
8. an impeller comprises: a header board; The one back plate that is oppositely arranged with described header board; Be arranged on a plurality of blades between described header board and the described back plate;
Wherein, at least be that one of described header board or described back plate are integrally formed with described all blades, described all blades are provided with a plurality of projectioies, do not have a surface that has applied the brazing metal layer, be provided with several holes on the position corresponding to described each blade projection on this another piece plate with all another plates of blade-shaped all-in-one-piece;
A plurality of projectioies of described blade are inserted respectively in the hole of described plate, and described each blade pass is crossed described brazing metal layer and is welded in described plate, and described each projection is heated and is welded in described plate.
9. impeller as claimed in claim 8 is characterized in that, described each projection is to heat and be welded in described plate by the combination of laser welding process, electro-beam welding process, resistance welding technology or above-mentioned some technology.
10. electric fan comprises: one is stored in the motor in the housing; One is fixedly mounted on the impeller in the rotating shaft of described motor; Be arranged on all stationary guide blades in described impeller downstream side; And be used to cover the fan casing that covers described impeller and described all stationary guide blades;
The improvement of described impeller comprises: a header board with a pump port, one and described header board be oppositely arranged and have one be used for described rotating shaft standing part back plate and be arranged on described header board and described back plate between a plurality of blades; At least be that one of described header board or described back plate are integrally formed with described all blades, after integrally formed, the interior perimeter surface and the outer surface of the described integrally formed plate of machining.
11. an electric fan comprises: one is stored in the motor in the housing; One is fixedly mounted on the impeller in the rotating shaft of described motor; Be arranged on all stationary guide blades in described impeller downstream side; And be used to cover the fan casing that covers described impeller and described all stationary guide blades;
The improvement of described impeller comprises: a header board with a pump port, one and described header board be oppositely arranged and have one be used for described rotating shaft standing part back plate and be arranged on described header board and described back plate between a plurality of blades; At least be one of described header board or described back plate cross an injection molding process with described all blade pass or extrusion process integrally formed, after integrally formed, the interior perimeter surface of described plate and outer surface are processed by a punch process or a mechanical processing technique again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98115481 CN1205399A (en) | 1997-07-11 | 1998-07-08 | Motor-driven blower and method of manufacturing impeller for motor-driven blower |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP186230/97 | 1997-07-11 | ||
| CN 98115481 CN1205399A (en) | 1997-07-11 | 1998-07-08 | Motor-driven blower and method of manufacturing impeller for motor-driven blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1205399A true CN1205399A (en) | 1999-01-20 |
Family
ID=5224600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98115481 Pending CN1205399A (en) | 1997-07-11 | 1998-07-08 | Motor-driven blower and method of manufacturing impeller for motor-driven blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1205399A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425843C (en) * | 2003-07-02 | 2008-10-15 | 奇鋐科技股份有限公司 | Wind direction outlet control unit |
| CN100453821C (en) * | 2003-07-22 | 2009-01-21 | 奇鋐科技股份有限公司 | Wind direction outlet controlling means |
| CN101406977B (en) * | 2008-11-25 | 2011-05-18 | 北京二七轨道交通装备有限责任公司 | Vacuum brazing method for pump impeller |
| CN102162466A (en) * | 2010-02-23 | 2011-08-24 | 日本电产株式会社 | Centrifugal fan impeller and moulding method thereof |
| CN102235384A (en) * | 2010-04-21 | 2011-11-09 | 日立空调·家用电器株式会社 | Electric pressure fan and electric dust collector having the same |
| CN101581320B (en) * | 2008-05-14 | 2012-05-09 | 株式会社日立产机系统 | Air feeding device |
| CN101749270B (en) * | 2010-01-21 | 2013-05-22 | 东莞市金鑫智能机械设备有限公司 | Impeller of centrifugal fan |
| CN104763574A (en) * | 2014-01-08 | 2015-07-08 | 阿尔斯通再生能源技术公司 | Method for fabricating a francis-type runner for a hydraulic machine, and runner fabricated using such a method |
| CN103161757B (en) * | 2011-12-15 | 2015-10-28 | 日本电产株式会社 | The manufacture method of centrifugal fan device and centrifugal fan device |
| CN105570192A (en) * | 2016-02-29 | 2016-05-11 | 李锦标 | Fan impeller and machining method thereof |
| CN107588042A (en) * | 2017-09-15 | 2018-01-16 | 奇鋐科技股份有限公司 | Blade structure and its rotor set |
| CN109695590A (en) * | 2017-10-20 | 2019-04-30 | 美蓓亚三美株式会社 | Impeller and the fan for using the impeller |
| CN112780585A (en) * | 2019-11-06 | 2021-05-11 | 中国石油化工股份有限公司 | Explosion-proof centrifugal ventilator and explosion-proof method thereof |
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- 1998-07-08 CN CN 98115481 patent/CN1205399A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425843C (en) * | 2003-07-02 | 2008-10-15 | 奇鋐科技股份有限公司 | Wind direction outlet control unit |
| CN100453821C (en) * | 2003-07-22 | 2009-01-21 | 奇鋐科技股份有限公司 | Wind direction outlet controlling means |
| CN101581320B (en) * | 2008-05-14 | 2012-05-09 | 株式会社日立产机系统 | Air feeding device |
| CN101406977B (en) * | 2008-11-25 | 2011-05-18 | 北京二七轨道交通装备有限责任公司 | Vacuum brazing method for pump impeller |
| CN101749270B (en) * | 2010-01-21 | 2013-05-22 | 东莞市金鑫智能机械设备有限公司 | Impeller of centrifugal fan |
| CN102162466A (en) * | 2010-02-23 | 2011-08-24 | 日本电产株式会社 | Centrifugal fan impeller and moulding method thereof |
| CN102235384A (en) * | 2010-04-21 | 2011-11-09 | 日立空调·家用电器株式会社 | Electric pressure fan and electric dust collector having the same |
| CN103161757B (en) * | 2011-12-15 | 2015-10-28 | 日本电产株式会社 | The manufacture method of centrifugal fan device and centrifugal fan device |
| CN104763574A (en) * | 2014-01-08 | 2015-07-08 | 阿尔斯通再生能源技术公司 | Method for fabricating a francis-type runner for a hydraulic machine, and runner fabricated using such a method |
| CN105570192A (en) * | 2016-02-29 | 2016-05-11 | 李锦标 | Fan impeller and machining method thereof |
| CN107588042A (en) * | 2017-09-15 | 2018-01-16 | 奇鋐科技股份有限公司 | Blade structure and its rotor set |
| CN109695590A (en) * | 2017-10-20 | 2019-04-30 | 美蓓亚三美株式会社 | Impeller and the fan for using the impeller |
| CN109695590B (en) * | 2017-10-20 | 2021-08-24 | 美蓓亚三美株式会社 | Impeller and fan using same |
| EP3473861B1 (en) * | 2017-10-23 | 2023-10-04 | Piller Blowers & Compressors GmbH | Castor wheel and method for manufacturing the same |
| CN112780585A (en) * | 2019-11-06 | 2021-05-11 | 中国石油化工股份有限公司 | Explosion-proof centrifugal ventilator and explosion-proof method thereof |
| CN114571644A (en) * | 2022-02-22 | 2022-06-03 | 浙江大学 | Combined type closed impeller with perfluor surface |
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