US20140134012A1 - Impeller and electric blower having the same - Google Patents
Impeller and electric blower having the same Download PDFInfo
- Publication number
- US20140134012A1 US20140134012A1 US13/831,834 US201313831834A US2014134012A1 US 20140134012 A1 US20140134012 A1 US 20140134012A1 US 201313831834 A US201313831834 A US 201313831834A US 2014134012 A1 US2014134012 A1 US 2014134012A1
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- United States
- Prior art keywords
- impeller
- shaft
- electric blower
- sleeve
- set forth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
-
- 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
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
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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
- F04D29/04—Shafts or bearings, or assemblies thereof
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/662—Balancing of rotors
Definitions
- the present invention relates to an impeller and an electric blower having the same.
- a balancing method of compensating for unbalance of a rotating rotor in a motor structure of a high speed cleaner is performed by assembling and processing a balancing part, which is a component capable of compensating for a balance in the rotating rotor to be balanced.
- the balancing part may be configured of upper and lower balancing parts.
- a process of process or molding a separate balancing part to assembling the balance part is required, and thus, volume, weight and inertia of the rotor increase, thereby increasing a load at the time of rotation.
- Patent Document 1 US 20070134109 A
- the present invention has been made in an effort to provide an impeller capable of performing two-dimensional balancing, that is, balancing at upper and lower portions of the impeller, and performing more accurate and efficient balancing by balancing guide grooves.
- the present invention has been made in an effort to provide an electric blower capable of implementing microminiaturization and ultra-lightness by including an impeller capable of performing efficient balancing, and receiving a driving module for driving the impeller in the impeller.
- an impeller including: an upper surface, which is an air inlet portion; a lower surface, which is an air outlet portion; and blades formed between the upper and lower surfaces, wherein the upper and lower surfaces are provided with guide grooves for balancing a motor.
- the guide groove may be formed in a circular shape in a rotation direction of the impeller.
- an electric blower including: an impeller including an upper surface, which is an air inlet portion, a lower surface, which is an air outlet portion, and blades formed between the upper and lower surfaces, the upper and lower surfaces provided with guide grooves for balancing the motor; and a driving module including a rotor part coupled to the impeller in order to drive the impeller and a stator part, the rotor part including a magnet, the stator part including an armature configured of a core and a coil that are positioned to face the magnet, and the rotor part and the stator part including an air bearing part formed therebetween, wherein the rotor part and the impeller are rotated by electromagnetic force of the magnet and the armature, and the driving module is received in the impeller.
- the rotor part of the driving module may include: a sleeve rotatably supported by a shaft; and a hub coupled to the sleeve and including the magnet coupled to an inner peripheral portion thereof.
- the sleeve and the shaft may be mounted with magnetic bearing magnets at surfaces facing each other, respectively.
- the magnetic bearing magnet may be mounted at an upper end portion of the sleeve.
- the stator part of the driving module may include: a shaft rotatably supporting the rotor part; a base to which the shaft is fixedly coupled; and the armature coupled to the base and configured of the core and the coil.
- the shaft may have a micro gap with the sleeve and be insertedly coupled to the sleeve so that an air bearing part is formed, and dynamic pressure generating grooves may be formed in an outer peripheral surface of the shaft facing the sleeve in a radial direction of the shaft.
- the shaft may further include a ball mounted on a surface facing the impeller in an axial direction of the shaft.
- the shaft may be formed with a ball receiving groove for mounting the ball at a central portion of an upper end surface thereof.
- the impeller may further include a plate mounted on a surface facing the ball.
- the electric blower may further including: an impeller cover covering the impeller; and a motor housing coupled to the impeller cover and including the stator part mounted therein.
- an electric blower including: an impeller including an upper surface, which is an air inlet portion, a lower surface, which is an air outlet portion, and blades formed between the upper and lower surfaces, the upper and lower surfaces provided with guide grooves for balancing of the motor; and a driving module including a rotor part coupled to the impeller in order to drive the impeller and a stator part, the rotor part including a magnet, the stator part including an armature configured of a core and a coil that are positioned to face the magnet, and the rotor part and the stator part including an air bearing partformed therebetween, wherein the rotor part and the impeller are rotated by electromagnetic force of the magnet and the armature, the driving module is received in the impeller, and the rotor part of the driving module includes a sleeve rotatably supported by the shaft and a magnet coupled to the sleeve so as to face the armature of the stator part.
- FIG. 1 is a cross-sectional view schematically showing an impeller according to a preferred embodiment of the present invention
- FIG. 2 is a perspective view schematically showing the impeller shown in FIG. 1 ;
- FIG. 3 is a cross-sectional view schematically showing an electric blower including the impeller shown in FIG. 1 according to a first preferred embodiment of the present invention.
- FIG. 4 is a cross-sectional view schematically showing an electric blower including the impeller shown in FIG. 1 according to a second preferred embodiment of the present invention.
- FIG. 1 is a cross-sectional view schematically showing an impeller according to a preferred embodiment of the present invention
- FIG. 2 is a perspective view schematically showing the impeller shown in FIG. 1 .
- an upper surface 11 which is an air inlet portion
- a lower surface 12 which is an air outlet portion
- blades 13 are formed between the upper and lower surfaces 11 and 112 .
- the blade 13 is formed with a round part so that a standing direction is bent from an upper portion, which is the inlet portion, to a lower portion, which is the outlet portion.
- the upper surface 11 is provided with a guide groove 11 a for balancing of the motor.
- the lower surface 12 is provided with a guide groove 12 a for balancing of the motor.
- the guide groove 12 a may be formed in a circular shape in a rotation direction of the impeller.
- FIGS. 1 and 2 show the case in which the guide grooves 11 a and 12 a are simultaneously formed in the upper and lower surfaces 11 and 12 , respectively, and balancing processing groove 11 b and 12 b are formed to be balanced. That is, more accurate and efficient balancing may be performed by two-dimensional balancing at the upper and lower portions.
- FIG. 3 is a cross-sectional view schematically showing an electric blower including the impeller shown in FIG. 1 according to a first preferred embodiment of the present invention.
- the electric blower 100 includes an impeller 110 and a driving module 120 . More specifically, the driving module 120 is positioned at a lower portion of the impeller so as to be received in the impeller.
- the impeller 110 is covered with an impeller cover 200 .
- the driving module 120 is configured of a rotor part and stator part, wherein the rotor part is coupled to the impeller 110 and the stator part is mounted in a motor housing 300 . Further, the cover 200 and the motor housing 300 are coupled to each other by press-fitting, or the like.
- the impeller 110 includes the balancing guide grooves 111 a and 112 a formed in upper and lower surfaces 111 and 112 , respectively, for balancing of the motor, and balancing processing grooves 111 b and 112 b are formed in the balancing guide grooves 111 a and 112 a to be balanced, such that more accurate and efficient balancing may be implemented.
- a shaft is provided with a radial dynamic pressure bearing part so as to have an air bearing part
- the electric blower has a structure in which the driving module is inserted into the impeller, such that miniaturization and lightness may be implemented, and high speed driving may be performed by the air bearing.
- the driving module 120 is configured of a stator part including a shaft 121 , a base 122 , an armature 123 configured of a core 123 a and a coil 123 b, and a printed circuit board 129 and a rotor part including a sleeve 124 , a hub 125 , and a magnet 126 .
- an outer diameter portion of the shaft 121 and an inner diameter portion of the sleeve 124 have a micro gap therebetween, and an air bearing part is formed in the micro gap.
- facing surfaces of the sleeve and the shaft are mounted with magnetic bearing magnets 127 , respectively.
- the sleeve 124 is rotatably supported by the shaft 121 .
- the sleeve 124 may include a radial dynamic pressure generating groove formed in the inner diameter portion thereof so that the air bearing part is formed in the micro gap with the shaft 121 , as described above.
- the hub 125 is coupled to the sleeve 124 and configured of a disk part 125 a extended from the sleeve 124 in an outer diameter direction and a side wall part 125 b extended downwardly in an axial direction of the shaft from an end portion of the disk part 125 a in the outer diameter direction.
- the sidewall part 125 b includes an annular ring shaped magnet 126 mounted on an inner peripheral surface thereof so as to face the armature 123 configured of the core 123 a and the coil 123 b.
- a magnetic bearing magnet 127 a is mounted on an inner peripheral surface of the sleeve 124 so as to face a magnetic bearing magnet 127 b of the shaft.
- the magnetic bearing magnet 127 a may have an annular ring shape.
- the shaft 121 rotatably supports the sleeve 124 as described above, and the lower portion thereof is fixedly coupled to the base 122 .
- the shaft 121 is mounted with the magnetic bearing magnet 127 b so as to face the magnetic bearing magnet 127 a of the sleeve.
- the driving module having a system in which dynamic pressure by the magnetic bearing magnets 127 a and 127 b mounted on each of the sleeve 124 and the shaft 121 in addition to the air bearing may be further stably designed may be implemented.
- an outer peripheral surface of the shaft 121 may be provided with radial dynamic pressure generating grooves so as to form the air bearing part.
- the dynamic pressure generating groove may be selectively formed in the outer peripheral surface of the shaft facing the sleeve or the inner peripheral surface of the sleeve facing the shaft.
- FIG. 3 shows the case in which the dynamic pressure generating grooves 121 a are formed in the outer peripheral surface of the shaft.
- the dynamic pressure generating groove may have various shapes such as a herringbone shape, or the like, and various sizes according to a design of the dynamic pressure.
- the base 122 includes the armature 123 fixedly coupled to the outer peripheral portion thereof by press-fitting, adhesion, or the like, so as to face the magnet 126 , wherein the armature 123 includes the core 123 a and the coil 123 b.
- the printed circuit board 129 which is to supply power to the armature, is mounted on one surface of the base 122 .
- two-dimensional balancing that is, balancing at the upper and lower portions of the impeller, may be performed, and more accurate and efficient balancing may be performed by the balancing guide grooves.
- FIG. 4 is a cross-sectional view schematically showing an electric blower including the impeller shown in FIG. 1 according to a second preferred embodiment of the present invention. More specifically, in the electric blower according to the second preferred embodiment of the present invention, a magnet is implemented in an inner-rotor type in which the magnet is coupled to a sleeve and rotates together with the sleeve, as compared to the electric blower according to the first preferred embodiment of the present invention. As shown FIG. 4 , the electric blower 100 includes an impeller 110 and a driving module 130 . More specifically, the driving module 130 is mounted at an inner portion and a lower portion of the impeller 110 of the electric blower 100 .
- the impeller 110 is covered with an impeller cover 200 .
- the driving module 130 is configured of a rotor part and stator part, wherein the rotor part is coupled to the impeller 110 and the stator part is mounted in a motor housing 300 .
- the cover 200 and the motor housing 300 are coupled to each other by press-fitting, or the like.
- the impeller 110 includes the balancing guide grooves 111 a and 112 a formed in upper and lower surfaces 111 and 112 , respectively, for balancing the motor, and balancing processing grooves 111 b and 112 b are formed in the balancing guide grooves 111 a and 112 a to be balanced, such that more accurate and efficient balancing may be implemented.
- the driving module has a shaft provided with a radial dynamic pressure bearing part so as to have an air bearing part.
- the driving module 130 is configured of a stator part including a shaft 131 , a base 132 , an armature 133 configured of a core 133 a and a coil 133 b, and a printed circuit board 138 and a rotor part including a sleeve 134 and a magnet 135 , wherein an outer diameter portion of the shaft 131 and an inner diameter portion of the sleeve 134 have a micro gap therebetween, and an air bearing part is formed in the micro gap.
- facing surfaces of the sleeve and the shaft are mounted with magnetic bearing magnets 137 a and 137 b , respectively.
- the sleeve 134 is rotatably supported by the shaft 131 .
- the sleeve 134 may include a radial dynamic pressure generating groove formed in an inner diameter portion thereof so that the air bearing part is formed in the micro gap with the shaft 131 , as described above.
- the sleeve is mounted with the magnet 135 facing the armature of the stator part on an inner peripheral surface thereof. Further, a magnetic bearing magnet 137 a is mounted so as to face a magnetic bearing magnet 137 b of the shaft.
- the magnetic bearing magnet 137 a may have an annular ring shape.
- the shaft 131 rotatably supports the sleeve 134 as described above, and the lower portion thereof is fixedly coupled to the base 132 .
- the shaft 131 is mounted with the magnetic bearing magnet 137 b so as to face the magnetic bearing magnet 137 a of the sleeve.
- the driving module having a system in which dynamic pressure by the magnetic bearing magnets 137 a and 137 b mounted on each of the sleeve 134 and the shaft 131 in addition to the air bearing may be stably designed may be implemented.
- an outer peripheral surface of the shaft 131 may be provided with radial dynamic pressure generating grooves so as to form the air bearing part.
- the dynamic pressure generating groove may be selectively formed in the outer peripheral surface of the shaft facing the sleeve or the inner peripheral surface of the sleeve facing the shaft.
- the base 132 includes the armature 133 fixedly coupled thereto by press-fitting, adhesion, or the like, so as to face the magnet 135 , wherein the armature 133 includes the core 133 a and the coil 133 b.
- the printed circuit board 138 which is to supply power to the armature, is mounted on one surface of the base 132 .
- the electric blower according to the first preferred embodiment of the present invention has a structure in which the driving module is inserted into the impeller, miniaturization and lightness thereof may be implemented, and high-speed driving may be implemented by the air bearing.
- the impeller capable of performing two-dimensional balancing, that is, balancing at the upper and lower portions of the impeller, and performing more accurate and efficient balancing by balancing guide grooves may be provided.
- the electric blower capable of implementing microminiaturization and ultra-lightness by including the impeller capable of performing efficient the balancing, and receiving the driving module for driving the impeller in the impeller may be provided.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Disclosed herein is an impeller including: an upper surface, which is an air inlet portion; a lower surface, which is an air outlet portion; and blades formed between the upper and lower surfaces, wherein the upper and lower surfaces are provided with guide grooves for balancing of a motor.
Description
- This application claims the benefit of Korean Patent Application No. 10-2012-0129569, filed on Nov. 15, 2012, entitled “Impeller and Electric Blower Having the Same”, which is hereby incorporated by reference in its entirety into this application.
- 1. Technical Field
- The present invention relates to an impeller and an electric blower having the same.
- 2. Description of the Related Art Generally, a balancing method of compensating for unbalance of a rotating rotor in a motor structure of a high speed cleaner is performed by assembling and processing a balancing part, which is a component capable of compensating for a balance in the rotating rotor to be balanced.
- In addition, the balancing part may be configured of upper and lower balancing parts. In this case, a process of process or molding a separate balancing part to assembling the balance part is required, and thus, volume, weight and inertia of the rotor increase, thereby increasing a load at the time of rotation.
- (Patent Document 1) US 20070134109 A
- The present invention has been made in an effort to provide an impeller capable of performing two-dimensional balancing, that is, balancing at upper and lower portions of the impeller, and performing more accurate and efficient balancing by balancing guide grooves.
- In addition, the present invention has been made in an effort to provide an electric blower capable of implementing microminiaturization and ultra-lightness by including an impeller capable of performing efficient balancing, and receiving a driving module for driving the impeller in the impeller.
- According to a preferred embodiment of the present invention, there is provided an impeller including: an upper surface, which is an air inlet portion; a lower surface, which is an air outlet portion; and blades formed between the upper and lower surfaces, wherein the upper and lower surfaces are provided with guide grooves for balancing a motor.
- The guide groove may be formed in a circular shape in a rotation direction of the impeller.
- According to another preferred embodiment of the present invention, there is provided an electric blower including: an impeller including an upper surface, which is an air inlet portion, a lower surface, which is an air outlet portion, and blades formed between the upper and lower surfaces, the upper and lower surfaces provided with guide grooves for balancing the motor; and a driving module including a rotor part coupled to the impeller in order to drive the impeller and a stator part, the rotor part including a magnet, the stator part including an armature configured of a core and a coil that are positioned to face the magnet, and the rotor part and the stator part including an air bearing part formed therebetween, wherein the rotor part and the impeller are rotated by electromagnetic force of the magnet and the armature, and the driving module is received in the impeller.
- The rotor part of the driving module may include: a sleeve rotatably supported by a shaft; and a hub coupled to the sleeve and including the magnet coupled to an inner peripheral portion thereof.
- The sleeve and the shaft may be mounted with magnetic bearing magnets at surfaces facing each other, respectively.
- The magnetic bearing magnet may be mounted at an upper end portion of the sleeve. The stator part of the driving module may include: a shaft rotatably supporting the rotor part; a base to which the shaft is fixedly coupled; and the armature coupled to the base and configured of the core and the coil.
- The shaft may have a micro gap with the sleeve and be insertedly coupled to the sleeve so that an air bearing part is formed, and dynamic pressure generating grooves may be formed in an outer peripheral surface of the shaft facing the sleeve in a radial direction of the shaft.
- The shaft may further include a ball mounted on a surface facing the impeller in an axial direction of the shaft.
- The shaft may be formed with a ball receiving groove for mounting the ball at a central portion of an upper end surface thereof.
- The impeller may further include a plate mounted on a surface facing the ball.
- The electric blower may further including: an impeller cover covering the impeller; and a motor housing coupled to the impeller cover and including the stator part mounted therein.
- According to another preferred embodiment of the present invention, there is provided an electric blower including: an impeller including an upper surface, which is an air inlet portion, a lower surface, which is an air outlet portion, and blades formed between the upper and lower surfaces, the upper and lower surfaces provided with guide grooves for balancing of the motor; and a driving module including a rotor part coupled to the impeller in order to drive the impeller and a stator part, the rotor part including a magnet, the stator part including an armature configured of a core and a coil that are positioned to face the magnet, and the rotor part and the stator part including an air bearing partformed therebetween, wherein the rotor part and the impeller are rotated by electromagnetic force of the magnet and the armature, the driving module is received in the impeller, and the rotor part of the driving module includes a sleeve rotatably supported by the shaft and a magnet coupled to the sleeve so as to face the armature of the stator part.
- The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
-
FIG. 1 is a cross-sectional view schematically showing an impeller according to a preferred embodiment of the present invention; -
FIG. 2 is a perspective view schematically showing the impeller shown inFIG. 1 ; -
FIG. 3 is a cross-sectional view schematically showing an electric blower including the impeller shown inFIG. 1 according to a first preferred embodiment of the present invention; and -
FIG. 4 is a cross-sectional view schematically showing an electric blower including the impeller shown inFIG. 1 according to a second preferred embodiment of the present invention. - The objects, features and advantages of the present invention will be more clearly understood from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same reference numerals are used to designate the same or similar components, and redundant descriptions thereof are omitted. Further, in the following description, the terms “first”, “second”, “one side”, “the other side” and the like are used to differentiate a certain component from other components, but the configuration of such components should not be construed to be limited by the terms. Further, in the description of the present invention, when it is determined that the detailed description of the related art would obscure the gist of the present invention, the description thereof will be omitted.
- Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.
-
FIG. 1 is a cross-sectional view schematically showing an impeller according to a preferred embodiment of the present invention, andFIG. 2 is a perspective view schematically showing the impeller shown inFIG. 1 . - As shown in
FIGS. 1 and 2 , in theimpeller 10, anupper surface 11, which is an air inlet portion, and alower surface 12, which is an air outlet portion are formed. In addition,blades 13 are formed between the upper andlower surfaces - More specifically, the
blade 13 is formed with a round part so that a standing direction is bent from an upper portion, which is the inlet portion, to a lower portion, which is the outlet portion. - Further, the
upper surface 11 is provided with aguide groove 11 a for balancing of the motor. - In addition, the
lower surface 12 is provided with aguide groove 12 a for balancing of the motor. - Further, the
guide groove 12 a may be formed in a circular shape in a rotation direction of the impeller. - As the guide groove 11 a in the upper surface and the guide groove 12 a in the lower surface are formed, in the case of balancing, more accurate and efficient balancing may be performed. That is, in the case in which a setting position is determined in a radial direction, and balancing data thereon at the time of processing a groove are already calculated, an error due to balancing processing may be prevented, and more efficient and accurate balancing may be performed.
- In addition,
FIGS. 1 and 2 show the case in which the guide grooves 11 a and 12 a are simultaneously formed in the upper andlower surfaces processing groove -
FIG. 3 is a cross-sectional view schematically showing an electric blower including the impeller shown inFIG. 1 according to a first preferred embodiment of the present invention. - As shown in
FIG. 3 , theelectric blower 100 includes animpeller 110 and adriving module 120. More specifically, thedriving module 120 is positioned at a lower portion of the impeller so as to be received in the impeller. - In addition, the
impeller 110 is covered with animpeller cover 200. In addition, thedriving module 120 is configured of a rotor part and stator part, wherein the rotor part is coupled to theimpeller 110 and the stator part is mounted in amotor housing 300. Further, thecover 200 and themotor housing 300 are coupled to each other by press-fitting, or the like. - Furthermore, the
impeller 110 includes thebalancing guide grooves lower surfaces balancing processing grooves balancing guide grooves - In addition, in the driving module, a shaft is provided with a radial dynamic pressure bearing part so as to have an air bearing part, and the electric blower has a structure in which the driving module is inserted into the impeller, such that miniaturization and lightness may be implemented, and high speed driving may be performed by the air bearing.
- Hereinafter, the driving module of the electric blower according to the first preferred embodiment of the present invention will be described in detail.
- The
driving module 120 is configured of a stator part including ashaft 121, abase 122, anarmature 123 configured of acore 123 a and acoil 123 b, and a printedcircuit board 129 and a rotor part including asleeve 124, ahub 125, and amagnet 126. - Further, an outer diameter portion of the
shaft 121 and an inner diameter portion of thesleeve 124 have a micro gap therebetween, and an air bearing part is formed in the micro gap. In addition, facing surfaces of the sleeve and the shaft are mounted withmagnetic bearing magnets 127, respectively. - Next, in the rotor part, the
sleeve 124 is rotatably supported by theshaft 121. In addition, thesleeve 124 may include a radial dynamic pressure generating groove formed in the inner diameter portion thereof so that the air bearing part is formed in the micro gap with theshaft 121, as described above. - Further, the
hub 125 is coupled to thesleeve 124 and configured of adisk part 125 a extended from thesleeve 124 in an outer diameter direction and aside wall part 125 b extended downwardly in an axial direction of the shaft from an end portion of thedisk part 125 a in the outer diameter direction. - Further, the
sidewall part 125 b includes an annular ring shapedmagnet 126 mounted on an inner peripheral surface thereof so as to face thearmature 123 configured of the core 123 a and thecoil 123 b. - Further, a
magnetic bearing magnet 127 a is mounted on an inner peripheral surface of thesleeve 124 so as to face amagnetic bearing magnet 127 b of the shaft. - In addition, the
magnetic bearing magnet 127 a may have an annular ring shape. - Next, in the stator part, the
shaft 121 rotatably supports thesleeve 124 as described above, and the lower portion thereof is fixedly coupled to thebase 122. - Further, the
shaft 121 is mounted with themagnetic bearing magnet 127 b so as to face themagnetic bearing magnet 127 a of the sleeve. - That is, the driving module having a system in which dynamic pressure by the
magnetic bearing magnets sleeve 124 and theshaft 121 in addition to the air bearing may be further stably designed may be implemented. - In addition, an outer peripheral surface of the
shaft 121 may be provided with radial dynamic pressure generating grooves so as to form the air bearing part. As described above, the dynamic pressure generating groove may be selectively formed in the outer peripheral surface of the shaft facing the sleeve or the inner peripheral surface of the sleeve facing the shaft. -
FIG. 3 shows the case in which the dynamicpressure generating grooves 121 a are formed in the outer peripheral surface of the shaft. In addition the dynamic pressure generating groove may have various shapes such as a herringbone shape, or the like, and various sizes according to a design of the dynamic pressure. - Next, the
base 122 includes thearmature 123 fixedly coupled to the outer peripheral portion thereof by press-fitting, adhesion, or the like, so as to face themagnet 126, wherein thearmature 123 includes the core 123 a and thecoil 123 b. - In addition, the printed
circuit board 129, which is to supply power to the armature, is mounted on one surface of thebase 122. - Through the above-mentioned configuration, in the electric blower including the impeller according to the first preferred embodiment of the present invention, two-dimensional balancing, that is, balancing at the upper and lower portions of the impeller, may be performed, and more accurate and efficient balancing may be performed by the balancing guide grooves.
-
FIG. 4 is a cross-sectional view schematically showing an electric blower including the impeller shown inFIG. 1 according to a second preferred embodiment of the present invention. More specifically, in the electric blower according to the second preferred embodiment of the present invention, a magnet is implemented in an inner-rotor type in which the magnet is coupled to a sleeve and rotates together with the sleeve, as compared to the electric blower according to the first preferred embodiment of the present invention. As shownFIG. 4 , theelectric blower 100 includes animpeller 110 and adriving module 130. More specifically, thedriving module 130 is mounted at an inner portion and a lower portion of theimpeller 110 of theelectric blower 100. - In addition, the
impeller 110 is covered with animpeller cover 200. In addition, thedriving module 130 is configured of a rotor part and stator part, wherein the rotor part is coupled to theimpeller 110 and the stator part is mounted in amotor housing 300. Further, thecover 200 and themotor housing 300 are coupled to each other by press-fitting, or the like. Furthermore, theimpeller 110 includes the balancingguide grooves lower surfaces processing grooves guide grooves - Furthermore, the driving module has a shaft provided with a radial dynamic pressure bearing part so as to have an air bearing part.
- In addition, the
driving module 130 is configured of a stator part including ashaft 131, abase 132, anarmature 133 configured of a core 133 a and acoil 133 b, and a printedcircuit board 138 and a rotor part including asleeve 134 and amagnet 135, wherein an outer diameter portion of theshaft 131 and an inner diameter portion of thesleeve 134 have a micro gap therebetween, and an air bearing part is formed in the micro gap. In addition, facing surfaces of the sleeve and the shaft are mounted withmagnetic bearing magnets - More specifically, in the rotor part, the
sleeve 134 is rotatably supported by theshaft 131. In addition, thesleeve 134 may include a radial dynamic pressure generating groove formed in an inner diameter portion thereof so that the air bearing part is formed in the micro gap with theshaft 131, as described above. - In addition, the sleeve is mounted with the
magnet 135 facing the armature of the stator part on an inner peripheral surface thereof. Further, amagnetic bearing magnet 137 a is mounted so as to face amagnetic bearing magnet 137 b of the shaft. - In addition, the
magnetic bearing magnet 137 a may have an annular ring shape. - Next, in the stator part, the
shaft 131 rotatably supports thesleeve 134 as described above, and the lower portion thereof is fixedly coupled to thebase 132. - Further, the
shaft 131 is mounted with themagnetic bearing magnet 137 b so as to face themagnetic bearing magnet 137 a of the sleeve. - That is, the driving module having a system in which dynamic pressure by the
magnetic bearing magnets sleeve 134 and theshaft 131 in addition to the air bearing may be stably designed may be implemented. - In addition, an outer peripheral surface of the
shaft 131 may be provided with radial dynamic pressure generating grooves so as to form the air bearing part. As described above, the dynamic pressure generating groove may be selectively formed in the outer peripheral surface of the shaft facing the sleeve or the inner peripheral surface of the sleeve facing the shaft. - Next, the
base 132 includes thearmature 133 fixedly coupled thereto by press-fitting, adhesion, or the like, so as to face themagnet 135, wherein thearmature 133 includes the core 133 a and thecoil 133 b. - In addition, the printed
circuit board 138, which is to supply power to the armature, is mounted on one surface of thebase 132. - As described above, as the electric blower according to the first preferred embodiment of the present invention has a structure in which the driving module is inserted into the impeller, miniaturization and lightness thereof may be implemented, and high-speed driving may be implemented by the air bearing.
- According to the present invention, the impeller capable of performing two-dimensional balancing, that is, balancing at the upper and lower portions of the impeller, and performing more accurate and efficient balancing by balancing guide grooves may be provided. In addition, the electric blower capable of implementing microminiaturization and ultra-lightness by including the impeller capable of performing efficient the balancing, and receiving the driving module for driving the impeller in the impeller may be provided.
- Although the embodiments of the present invention have been disclosed for illustrative purposes, it will be appreciated that the present invention is not limited thereto, and those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention.
- Accordingly, any and all modifications, variations or equivalent arrangements should be considered to be within the scope of the invention, and the detailed scope of the invention will be disclosed by the accompanying claims.
Claims (13)
1. An impeller comprising:
an upper surface, which is an air inlet portion;
a lower surface, which is an air outlet portion; and
blades formed between the upper and lower surfaces,
wherein the upper and lower surfaces are provided with guide grooves for balancing of a motor.
2. The impeller as set forth in claim 1 , wherein the guide groove is formed in a circular shape in a rotation direction of the impeller.
3. An electric blower comprising:
an impeller including an upper surface, which is an air inlet portion, a lower surface, which is an air outlet portion, and blades formed between the upper and lower surfaces, the upper and lower surfaces provided with guide grooves for balancing of the motor; and
a driving module including a rotor part coupled to the impeller in order to drive the impeller and a stator part, the rotor part including a magnet, the stator part including an armature configured of a core and a coil that are positioned to face the magnet, and the rotor part and the stator part including an air bearing part formed therebetween,
wherein the rotor part and the impeller are rotated by electromagnetic force of the magnet and the armature, and the driving module is received in the impeller.
4. The electric blower as set forth in claim 3 , wherein the rotor part of the driving module includes:
a sleeve rotatably supported by a shaft; and
a hub coupled to the sleeve and including the magnet coupled to an inner peripheral portion thereof.
5. The electric blower as set forth in claim 3 , wherein the sleeve and the shaft are mounted with magnetic bearing magnets at surfaces facing each other, respectively.
6. The electric blower as set forth in claim 5 , wherein the magnetic bearing magnet is mounted at an upper end portion of the sleeve.
7. The electric blower as set forth in claim 3 , wherein the rotor part of the driving module includes:
a sleeve rotatably supported by the shaft; and
a magnet coupled to the sleeve so as to face the armature of the stator part.
8. The electric blower as set forth in claim 3 , wherein the stator part of the driving module includes:
a shaft rotatably supporting the rotor part;
a base to which the shaft is fixedly coupled; and
the armature coupled to the base and configured of the core and the coil.
9. The electric blower as set forth in claim 8 , wherein the shaft has a micro gap with the sleeve and is insertedly coupled to the sleeve so that an air bearing part is formed, and dynamic pressure generating grooves are formed in an outer peripheral surface of the shaft facing the sleeve in a radial direction of the shaft.
10. The electric blower as set forth in claim 9 , wherein the shaft further includes a ball mounted on a surface facing the impeller in an axial direction of the shaft.
11. The electric blower as set forth in claim 10 , wherein the shaft is formed with a ball receiving groove for mounting the ball at a central portion of an upper end surface thereof.
12. The electric blower as set forth in claim 11 , wherein the impeller further includes a plate mounted on a surface facing the ball.
13. The electric blower as set forth in claim 1 , further comprising:
an impeller cover covering the impeller; and
a motor housing coupled to the impeller cover and including the stator part mounted therein.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120129569A KR20140062779A (en) | 2012-11-15 | 2012-11-15 | Impeller and electric blower having the same |
KR10-2012-0129569 | 2012-11-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140134012A1 true US20140134012A1 (en) | 2014-05-15 |
Family
ID=50681864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/831,834 Abandoned US20140134012A1 (en) | 2012-11-15 | 2013-03-15 | Impeller and electric blower having the same |
Country Status (3)
Country | Link |
---|---|
US (1) | US20140134012A1 (en) |
KR (1) | KR20140062779A (en) |
CN (1) | CN103821762A (en) |
Cited By (8)
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USD778958S1 (en) * | 2014-12-19 | 2017-02-14 | Kawasaki Jukogyo Kabushiki Kaisha | Impeller for superchargers |
US20170177009A1 (en) * | 2015-12-17 | 2017-06-22 | Venturedyne, Ltd. | Environmental sensor and method of operating the same |
EP3432453A1 (en) * | 2017-07-21 | 2019-01-23 | Nidec Corporation | Blowing device and cleaner |
USD847861S1 (en) * | 2017-03-21 | 2019-05-07 | Wilkins Ip, Llc | Impeller |
EP3376047A4 (en) * | 2015-11-09 | 2019-07-24 | Nidec Corporation | Blowing device and cleaner |
US10557472B2 (en) | 2015-12-17 | 2020-02-11 | Venturedyne, Ltd. | Environmental sensor and method of operating the same |
WO2020086095A1 (en) * | 2018-10-26 | 2020-04-30 | Borgwarner Inc. | Rotating machine and method of using the same |
US10729218B2 (en) | 2015-12-11 | 2020-08-04 | Dyson Technology Limited | Motor and a handheld device having a motor |
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DE102017203833A1 (en) * | 2017-03-08 | 2018-09-13 | Mahle International Gmbh | liquid pump |
CN112412836B (en) * | 2020-10-15 | 2022-08-02 | 山东中威空调设备集团暖通有限公司 | Assembled axial fan |
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Also Published As
Publication number | Publication date |
---|---|
CN103821762A (en) | 2014-05-28 |
KR20140062779A (en) | 2014-05-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SAMSUNG ELECTRO-MECHANICS CO., LTD., KOREA, REPUBL Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHO, YONG WAN;REEL/FRAME:030118/0089 Effective date: 20130109 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |