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WO2020062479A1 - 电风机 - Google Patents

电风机 Download PDF

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Publication number
WO2020062479A1
WO2020062479A1 PCT/CN2018/115373 CN2018115373W WO2020062479A1 WO 2020062479 A1 WO2020062479 A1 WO 2020062479A1 CN 2018115373 W CN2018115373 W CN 2018115373W WO 2020062479 A1 WO2020062479 A1 WO 2020062479A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
core
casing
electric fan
stator
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.)
Ceased
Application number
PCT/CN2018/115373
Other languages
English (en)
French (fr)
Inventor
刘洪波
刘俊龙
范文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Welling Motor Manufacturing Co Ltd
Original Assignee
Guangdong Welling Motor Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong Welling Motor Manufacturing Co Ltd filed Critical Guangdong Welling Motor Manufacturing Co Ltd
Priority to JP2021517816A priority Critical patent/JP7105997B2/ja
Priority to KR1020217010941A priority patent/KR102521833B1/ko
Priority to EP18935430.1A priority patent/EP3848591B1/en
Publication of WO2020062479A1 publication Critical patent/WO2020062479A1/zh
Priority to US17/217,137 priority patent/US11466693B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • 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
    • 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
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • 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
    • F04D29/22—Rotors specially for centrifugal pumps
    • 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
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/40—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
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/12—Kind or type gaseous, i.e. compressible

Definitions

  • the present invention relates to the technical field of electric fans, in particular to an electric fan, especially a high-speed electric fan.
  • the present invention aims to solve at least one of the above technical problems.
  • an object of the present invention is to provide an electric fan.
  • an electric fan including: a rotor assembly, the rotor assembly includes a bearing, a moving impeller, and a magnetic ring, and the magnetic ring and the moving impeller are respectively installed on the bearing Both ends; and a casing, the casing having a bearing chamber, the diameter of the magnetic ring is smaller than the diameter of the bearing chamber, the magnetic ring can pass through the bearing chamber, the moving impeller and the magnet
  • the rings are respectively located at both ends of the bearing chamber.
  • the electric fan provided by the above technical solution of the present invention uses only one bearing, and the bearing is located between the moving impeller and the magnetic ring of the rotating shaft. During assembly, the magnetic ring passes through the bearing chamber. After the installation is completed, the moving impeller and the magnetic ring are respectively located in the bearing. At both ends of the chamber, this assembly method of the rotor component and the casing is convenient to assemble and the assembly process is simplified; because only one bearing is used, the assembly accuracy requirements of the rotor component and the casing are low, which is beneficial to improve the assembly efficiency; and reduce The number of parts of the electric fan is helpful to reduce product costs and further improve assembly efficiency.
  • the electric fan provided in the above technical solution of the present invention may also have the following additional technical features:
  • the bearing chamber is provided with a ring-shaped step extending radially inwardly, the magnetic ring can pass through the middle of the ring-shaped step, and the bearing is limited by the ring-shaped step. Located in the bearing chamber.
  • the annular step is used to axially limit the bearing to ensure the accuracy of the bearing assembly position and to prevent the bearing from coming out of the bearing chamber.
  • the casing is an injection-molded casing
  • the bearing chamber is provided with a bearing positioning hole
  • an inner wall of the bearing positioning hole is provided with a rubber-containing groove
  • the bearing is installed on the bearing Indoor, the bearing and the bearing positioning hole are transitionally matched; or the casing is an injection-molded casing, the bearing chamber is provided with a bearing positioning hole, and the inner wall of the bearing positioning hole is provided with a rubber-containing groove, A bearing sleeve is installed in the bearing chamber, and the bearing sleeve and the bearing positioning hole are transitionally fitted, and the bearing is installed in the bearing sleeve.
  • the casing uses a non-metallic injection molding casing, which can reduce the loss of the motor, thereby improving the efficiency of the motor.
  • the injection molding casing does not generate eddy current heat than the metal casing, which reduces the temperature of the external working environment of the bearing and improves the bearing.
  • Reliability there are bearing positioning holes in the bearing chamber. The transition between the bearing positioning holes and the bearing (or bearing sleeve) is used to achieve the predetermined position of the bearing to ensure the coaxiality of the bearing installation, which is helpful to improve the assembly accuracy of the bearing and ensure the bearing work.
  • the glue flows to and fills the containing groove to achieve a firm adhesion between the bearing chamber and the bearing (or bearing sleeve) Connection, thereby ensuring the reliability of the bearing in a high temperature working environment; and the injection molding casing is superior to the metal casing in terms of manufacturing cost and weight.
  • the electric fan further includes a windshield
  • the windshield is installed on the outside of one end of the casing, and the casing and the windshield have matching mating sides, One of the mating sides is provided with a predetermined rib protruding toward the other mating side.
  • Pre-positioned ribs are provided on the mating side between the casing and the wind hood.
  • the pre-positioned ribs play a pre-positioned role when the air hood and the casing are assembled, thereby ensuring the Clearance, control the accuracy of the air duct assembly, prevent friction between the gap between the air hood and the moving impeller during the assembly process, thereby ensuring the stability of the electric fan, and reduce the vibration noise caused by the poor assembly accuracy of the air duct part, thereby ensuring the operation of the electric fan Efficiency and reliability at work, with the advantages of small vibration, low noise and high fan efficiency.
  • the electric fan further includes a wind hood, the wind hood is installed on the outside of one end of the casing, an inner chamfer is formed at an air inlet of the air hood, and the air inlet Into an open bell mouth shape.
  • the above solution can reduce the air resistance of the air inlet, increase the air flow at the air inlet, and make the flow field of the air at the air inlet smoother, which is conducive to improving the working efficiency of the electric fan and reducing the noise of the air flow, which can significantly increase the electricity. Fan performance.
  • the casing includes a support casing and a diffuser blade provided on the support casing, and the diffuser blade is integrally injection-molded with the support casing.
  • the diffuser blade and the support casing are integrally injection-molded into an integrated injection-molded casing, eliminating the assembly process of the diffuser blade and the casing, ensuring the dimensional accuracy of the plane of the diffuser blade and the bearing chamber of the casing, and improving the wind
  • the assembly precision of the air duct system improves the performance of the electric fan and reduces the vibration noise caused by the poor assembly accuracy of the air duct part; and the integral injection molding of the diffuser blade and the casing can solve the demolding in the air duct of the diffuser blade Trace issues; the above guarantees a smooth air duct and consistent assembly, thereby ensuring the stable performance of the electric fan; at the same time, the integrated injection molding machine casing reduces the weight and manufacturing cost of the machine compared to the metal casing.
  • the electric fan further includes a wind hood, the wind hood is installed outside an end of the casing, and the wind hood is provided with an end surface of the air inlet end facing away from the wind hood.
  • a positioning plane, and a surface of the diffuser blade facing the positioning plane is in conformity with the positioning plane.
  • the wind hood and the integrated casing are axially positioned on the wind hood through the positioning plane on the wind hood and the surface of the diffuser blade, which is convenient for the glue operation between the wind hood and the casing.
  • the electric fan further includes a wind hood
  • the wind hood is installed outside an end of the casing
  • the wind hood includes a wind hood body and a wind hood body provided on the wind hood body.
  • a diffuser blade which is integrally injection-molded with the hood body.
  • the diffuser blade and the windshield body are integrally injection-molded, which can avoid the assembly gap between the diffuser blade and the windshield, thereby ensuring the airtightness of the air duct system, reducing the loss of fluid along the way, and improving the performance of the electric fan.
  • the electric fan further includes a stator core
  • the casing is provided with an iron core fixing seat
  • the iron core fixing seat is provided with an iron core positioning groove
  • the iron The core fixing seat can position the stator core in the axial direction
  • the core positioning groove can position the stator core in the circumferential direction.
  • stator core When the stator core and the casing are assembled, the stator core is axially positioned by using the core fixing seat, and the stator core is circumferentially positioned by using the core positioning slot, thereby facilitating the subsequent fixation by gluing or screwing. Stator core.
  • the electric fan further includes a stator iron core
  • the stator iron core is formed by combining at least two stator iron core petals, and each of the stator iron core petals includes an iron core body
  • the insulation structure includes a thin-walled structure wrapped around the periphery of the iron core body, and a spliced portion structure extending outward from the thin-walled structure, the spliced portion structure is used to splice adjacent two petals.
  • the stator core lobe is described.
  • the insulation structure of the stator core not only bears the function of electrical insulation, but also plays the role of assembling and fastening the stator core lobes.
  • the scheme of the invention reduces the stator core.
  • the weight of the stator core is reduced and the performance of the motor is improved; and the stator core can improve the coupling force between the stator core chips and the damping of the stator core structure, thereby reducing the noise and vibration of the motor.
  • the insulation structure further includes a support portion structure extending outward from the thin-walled structure, and the support portion structure is provided with positioning holes or positioning protrusions, and the positioning holes or positioning The protrusion is used to cooperate with the mounting seat of the electric fan to achieve a predetermined position.
  • the insulation structure of the stator core also plays the role of supporting the entire stator core in the final assembly.
  • the positioning holes or projections on the support structure are designed to realize the pre-positioning function of the mounting seat and the stator core during assembly, which is convenient.
  • the fixing and wiring between the subsequent installation seat and the stator core are designed to realize the pre-positioning function of the mounting seat and the stator core during assembly, which is convenient.
  • the core body includes a core yoke portion, at least one core tooth portion, and two sub-core tooth portions, and both of the sub-core tooth portions are provided on the core.
  • the inside of the yoke is located at both ends in the circumferential direction of the core yoke, and the core teeth are provided inside the core yoke and between two sub-core teeth;
  • the insulation structure includes two spliced part structures that are respectively opposed to two of the sub-core teeth and extend in a direction away from the center of the sub-core teeth, and at least one is connected to the core teeth.
  • the support portion structure is opposite to each other and extends in a direction away from the center of the core tooth portion.
  • the structure of the split part is opposite to the teeth of the sub-core, which is conducive to improving the structural strength of the split part structure, thereby increasing the structural strength of the two adjacent stator core petals using the split part structure, thereby increasing the overall strength of the stator core;
  • the support part structure is opposite to the iron core tooth part, which is beneficial to improve the structural strength of the support part structure, thereby improving the support strength of the support part structure for the entire stator core.
  • the electric fan further includes a stator core and a mounting base, the stator core is installed inside one end of the casing, and the mounting base is mounted on the stator core An end away from the casing, the mounting seat is provided with a terminal terminal slot for accommodating a terminal, and the stator assembly is formed by pulling a terminal between the mounting seat and the stator iron core.
  • an end plate is installed at an end of the mounting seat away from the stator core, and the stator assembly and the end plate are connected by terminal welding.
  • the end plate is a PC board.
  • FIG. 1 is a schematic exploded structure diagram of an electric fan according to an embodiment of the present invention
  • FIG. 2 is a schematic cross-sectional structural diagram of an electric fan according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a cabinet according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of the casing shown in FIG. 3 from another perspective;
  • FIG. 5 is a schematic diagram of an assembly structure of a casing, a rotor assembly, and a windshield shown in FIG. 3;
  • FIG. 6 is a schematic structural diagram of a windshield according to another embodiment of the present invention.
  • FIG. 7 is a schematic cross-sectional structure diagram of the air hood shown in FIG. 6;
  • FIG. 8 is a schematic diagram of an assembly structure of a windshield, a rotor assembly, and a casing shown in FIG. 6;
  • FIG. 9 is a schematic structural diagram of a cabinet according to another embodiment of the present invention.
  • FIG. 10 is a schematic structural view of the casing shown in FIG. 9 from another perspective;
  • FIG. 11 is a schematic diagram of an assembly structure of a casing, a rotor assembly, and a stator core shown in FIG. 9;
  • FIG. 12 is a schematic cross-sectional structure view taken along the direction A-A in FIG. 11; FIG.
  • FIG. 13 is a schematic structural diagram of a casing and a bearing sleeve according to another embodiment of the present invention.
  • FIG. 14 is a schematic diagram of an assembly structure of a casing, a rotor assembly, and a stator core shown in FIG. 13;
  • FIG. 15 is a schematic cross-sectional view taken along the line B-B in FIG. 14; FIG.
  • FIG. 16 is a schematic structural diagram of an iron core body according to an embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of an insulation structure according to an embodiment of the present invention.
  • FIG. 18 is a schematic structural diagram of a stator core lobe according to an embodiment of the present invention.
  • FIG. 19 is a schematic structural diagram of a stator core lobe according to an embodiment of the present invention.
  • FIG. 20 is a schematic structural diagram of a stator core lobe before being assembled according to another embodiment of the present invention.
  • FIG. 21 is a schematic structural diagram of the stator core lobe shown in FIG. 20 after being assembled.
  • an electric fan provided according to some embodiments of the present invention includes a rotor assembly 2 and a casing 3.
  • the rotor assembly 2 includes a bearing 21, a moving impeller 22, and a magnetic ring 23.
  • the bearing 21, the moving impeller 22, and the magnetic ring 23 (ie, the rotor) are all mounted on the rotating shaft 20.
  • the diameter of the magnetic ring 23 is smaller than the diameter of the bearing 21.
  • the magnetic ring 23 and the moving impeller 22 are installed at both ends of the bearing 21 respectively; the casing 3 has a bearing chamber 33, and the diameter of the magnetic ring 23 is smaller than the bearing For the diameter of the chamber 33, the magnetic ring 23 can pass through the bearing chamber 33.
  • the moving impeller 22 and the magnetic ring 23 are located at both ends of the bearing chamber 33, respectively.
  • the electric fan provided by the above embodiment of the present invention uses only one bearing 21, and the bearing 21 is located between the moving impeller 22 and the magnetic ring 23 of the rotating shaft 20.
  • the magnetic ring 23 passes through the bearing chamber 33.
  • the impeller 22 and the magnetic ring 23 are located at two ends of the bearing chamber 33 respectively.
  • This assembly method of the rotor assembly 2 and the casing 3 is convenient for assembly and the assembly process is simplified. Since only one bearing 21 is used, the rotor assembly 2 and the casing are assembled. 3 requires low assembly accuracy, which is conducive to improving the efficiency of assembly; and reduces the number of parts of the electric fan, which is helpful to reduce the cost of the product and further improve the efficiency of assembly.
  • the bearing chamber 33 is provided with an annular step 330 formed to extend inward in the radial direction.
  • the magnetic ring 23 can pass through the middle of the annular step 330.
  • the bearing 21 is limited to the bearing by the annular step 330.
  • an annular step 330 is used to axially limit the bearing 21 to ensure the assembly position accuracy of the bearing 21 and to prevent the bearing 21 from coming out of the bearing chamber 33.
  • the casing 3 is an injection-molded casing.
  • the bearing chamber 33 of the casing 3 is provided with a bearing positioning hole 331, and an inner wall of the bearing positioning hole 331 is provided with a rubber groove. 332; as shown in FIG. 11 and FIG. 12, the bearing 21 of the rotor assembly 2 is installed in the bearing chamber 33.
  • the transition between the bearing 21 and the bearing positioning hole 331 is matched.
  • the thermosetting glue is used between the bearing 21 and the bearing chamber 33. Connected and fixed.
  • the casing 3 is an injection-molded casing.
  • the bearing chamber 33 of the casing 3 is provided with a bearing positioning hole 331, and the inner wall of the bearing positioning hole 331 is provided with an adhesive-containing hole.
  • the groove 332, the bearing housing 8 is installed in the bearing chamber 33, the bearing housing 8 and the bearing positioning hole 331 are transitionally fitted, and the bearing housing 8 and the bearing chamber 3 are fixed with a thermosetting glue; as shown in Figs. 14 and 15
  • the bearing 21 of the rotor assembly 2 is installed in a bearing sleeve 8.
  • the bearing sleeve 8 and the bearing 21 are fitted with a clearance, and are fixed with a metal-to-metal glue.
  • the casing 3 is made of a non-metallic injection-molded casing, which can reduce the motor loss and improve the efficiency of the motor. At the same time, the injection-molded casing does not generate eddy current and generate heat than the metal casing, which accordingly reduces the temperature of the external working environment of the bearing and increases the temperature.
  • Bearing reliability there is a bearing positioning hole 331 in the bearing chamber 33. The transition between the bearing positioning hole 331 and the bearing 21 (or bearing sleeve 8) is used to achieve the predetermined position of the bearing and ensure the coaxiality of the bearing installation, which is conducive to improving the bearing.
  • thermosetting glue can be used for bonding and fixing, and the glue flows to and fills the glue containing groove 332 to realize the bearing chamber 33 and
  • the firm bonding between the bearings 21 (or bearing sleeve 8) ensures the reliability of the bearing in a high-temperature working environment; and the injection molding casing is superior to the metal casing in terms of manufacturing cost and weight.
  • the electric fan further includes a hood 1.
  • the hood 1 is installed on the outside of one end of the casing 3.
  • the mating side, one of the mating sides is provided with a predetermined rib protruding toward the other mating side.
  • the cabinet 3 has a mating side 311 adapted to the hood 1, and the mating side 311 is provided with a predetermined rib 312.
  • the hood 1 has A mating side 12 adapted to the casing 3 is provided with a predetermined rib 13.
  • a predetermined positioning rib is provided on the matching side of the casing 3 and the wind hood 1, and the predetermined positioning rib plays a predetermined positioning role when the wind hood 1 and the casing 3 are assembled, thereby ensuring that the wind hood 1 and the wind hood 1 are installed in the wind hood.
  • the clearance between the moving impeller 22 on the inside 1 controls the accuracy of the air duct assembly to prevent the gap deviation between the wind hood 1 and the moving impeller 22 during the assembly process, which causes friction, thereby ensuring the stability of the electric fan performance and reducing the poor assembly accuracy due to the air duct part.
  • the generated vibration noise ensures the working efficiency and reliability of the electric fan. It has the advantages of low vibration, low noise, and high fan efficiency.
  • an inner chamfer 11 is formed at the air inlet of the air hood 1, and the air inlet is in the shape of an open bell mouth, which can reduce the air resistance of the air inlet and can obviously Improve electric fan performance.
  • the air hood 1 is provided on the outer side of the moving impeller 22, and the end of the inner chamfer 11 facing away from the air inlet end of the air hood 1 is referred to as the tail end, and the tail end of the inner chamfer 11 Not lower than the tip of the blades of the moving impeller 22; preferably, the rear end of the inner chamfer 11 and the inner wall surface of the wind hood 1 connected to it are smoothly transitionally connected, so that the flow field of air in the wind hood 1 is smoother, Conducive to further improve the performance of electric fans.
  • the cabinet 3 includes a support shell 31 and a diffuser blade 32 provided on the support shell 31.
  • the diffuser blade 32 and the support shell 31 are integrally injection-molded. forming.
  • the diffuser blade 32 and the support shell 31 are integrally injection-molded into an integrated injection molding machine casing 3, and the assembling process of the diffuser blade 32 and the casing 3 is omitted to ensure the plane of the diffuser blade 32 and the bearing chamber of the casing 3 33 stop size accuracy, improve the assembly precision of the air duct system, thereby improving the performance of the electric fan, and reducing the vibration noise caused by the poor assembly accuracy of the air duct part; and the integral injection of the diffuser blade 32 and the support shell 31 It can solve the problem of demolding marks in the air duct of the diffuser blade; the above ensures the smooth air duct and consistent assembly, thereby ensuring the stability of the electric fan; at the same time, the integrated injection molding machine casing 3 reduces the whole machine compared with the metal casing. Weight and manufacturing costs.
  • the air hood 1 has a positioning plane 14 provided on the end surface of the air inlet end facing away from the air hood 1, and the surface of the diffuser blade 32 facing the positioning plane 14 is aligned with the positioning plane 14 to achieve wind resistance.
  • the axial positioning of the hood 1 is convenient for the glue operation between the hood 1 and the casing 3.
  • the hood 1 includes a hood body 15 and a diffuser blade 16 provided on the hood body 15, the diffuser blade 16 and the hood
  • the main body 15 is integrally injection-molded.
  • the diffuser blades 16 and the hood body 15 are integrally injection-molded, which can avoid the assembly gap between the diffuser blades 16 and the hood 1, thereby ensuring the airtightness of the air duct system, reducing the loss of fluid along the path, and improving electricity. Fan performance.
  • the electric fan further includes a stator core 4, as shown in FIG. 4 and FIG. 10, the casing 3 is provided with an iron core fixing seat 34, and the iron core fixing seat 34 is provided with an iron core positioning.
  • the slots 35 and the core fixing seat 34 can position the stator core 4 in the axial direction, and the core positioning slots 35 can position the stator core 4 in the circumferential direction.
  • stator core 4 When the stator core 4 and the casing 3 are assembled, the stator core 4 is axially positioned using the core fixing seat 34, and the stator core 4 is circumferentially positioned using the core positioning groove 35, thereby facilitating the subsequent use of an adhesive method or The stator core 4 is fixed in all directions by screwing.
  • the stator core 4 is formed by assembling at least two petals of the stator core, and each petal of the stator core includes an iron core body 41 and an insulation structure 42.
  • the insulation structure 42 includes a thin-walled structure 421 wrapped around the periphery of the iron core body 41 and a split portion structure 422 extending outward from the thin-walled structure 421.
  • the split portion structure 422 is used to split two adjacent stator core core petals.
  • the insulating structure 42 further includes a supporting portion structure 423 extending outward from the thin-walled structure 421.
  • the supporting portion structure 423 is provided with a positioning hole 4231 or a positioning protrusion, and the positioning hole 4231 or The positioning protrusion is used to cooperate with the mounting seat 5 of the electric fan to achieve a predetermined position.
  • the insulation structure 42 of the stator core 4 not only undertakes the function of electrical insulation, but also undertakes the functions of assembling and fastening the stator core lobes and supporting the entire stator core 4 in the assembly, compared with the stator iron in the prior art.
  • the core 4 is self-assembled and self-supporting structure.
  • the scheme of the present invention reduces the weight of the stator core 4 and reduces the iron loss of the stator core 4, thereby improving the performance of the motor; and the stator core 4 can improve the stator core
  • the bonding force between the 4 pieces and the structural damping of the stator core 4 reduce the noise and vibration of the motor.
  • the positioning holes 4231 or positioning protrusions on the support structure 423 are designed to achieve the installation.
  • the pre-positioning effect of the seat 5 and the stator core 4 during assembly facilitates the subsequent fixing and wiring between the mounting seat 5 and the stator core 4.
  • the core body 41 includes a core yoke portion 411, at least one core tooth portion 412, and two sub-core tooth portions 413, both of which are provided on the iron.
  • the core yoke portion 411 is located inside the core yoke portion 411 at both ends in the circumferential direction, and the core tooth portion 412 is provided inside the core yoke portion 411 and located between two sub-core tooth portions 413.
  • the insulation structure 42 includes two A split portion structure 422 which is opposite to the two sub-core teeth 413 and extends in a direction away from the center of the sub-core teeth 413, and at least one of which is opposite to the core teeth 412 and is along the core teeth 412 is a support structure 423 extending away from the center.
  • the split portion structure 422 is opposite to the sub-core tooth portion 413, which is conducive to improving the structural strength of the split portion structure 422, thereby increasing the structural strength of the two adjacent stator core petals that are split by the split portion structure 422, thereby increasing the stator core.
  • the overall strength of 4; the support portion structure 423 is opposite to the core tooth portion 412, which is beneficial to increase the structural strength of the support portion structure 423, thereby increasing the support strength of the support portion structure 423 to the entire stator core 4.
  • the stator core 4 is formed by combining two petals of the stator core, and the number of the core teeth 412 of each of the stator core petals is two. They are spaced apart along the circumferential direction of the core yoke portion 411.
  • the insulation structure 42 of each stator core core lobe includes two spliced portion structures 422, which are divided at the circumferential ends of the thin-walled structure 421.
  • One of the split structure 422 is provided with a convex portion 4221, and the other of the split structure 422 is provided with a concave portion 4222.
  • stator core petals pass through the convex portion 4221 of the split structure 422 and the other
  • the combination of the recessed part 4222 of a split part structure 422 achieves split fit;
  • the insulation structure 42 of each lobe of the stator core core also includes two support part structures 423, which are opposite to the two core tooth parts 412, The core teeth 412 extend away from the center, and each supporting portion structure 423 is provided with a positioning hole 4231.
  • the stator core 4 is formed by combining two petals of the stator core, and the number of the core teeth 412 of each petal of the stator core is The two are arranged at intervals along the circumferential direction of the core yoke portion 411.
  • the insulation structure 42 of each stator core core lobe includes two spliced portion structures 422, which are divided at the circumferential ends of the thin-walled structure 421.
  • a convex portion 4221 is provided on one of the split portion structures 422, and a concave portion 4222 is provided on the other split portion structure 422.
  • a convex portion 4221 of the split portion structure 422 is provided, and The cooperation of the recessed part 4222 of the other split part structure 422 is achieved;
  • the insulation structure 42 of each lobe of the stator core core also includes two support part structures 423, of which one of the support part structure 423 and two of the core tooth parts 412 One opposite and extending along the opposite direction of the core tooth portion 412 away from the center, the supporting portion structure 423 is provided with a positioning hole 4231; the other supporting portion structure 423 is merged with one of the split portion structures 422 to form a composite structure 424.
  • one half of the composite structure 424 is provided with a first positioning hole smaller than a semicircle, and the other half of the composite structure 424 is provided with a second positioning hole larger than a semicircle.
  • the two half composite structures are 424 is assembled so that the first positioning hole and the second positioning hole are combined into a round positioning hole 4231; and one half of the composite structure 424 is provided with a raised portion 4221, and the other half of the composite structure 424 is provided with a recessed portion 4222, two The semi-composite structure 424 is assembled, so that the convex portion 4221 and the concave portion 4222 cooperate to realize the assembly of the two stator iron core petals; that is, this embodiment is the structure of two support portions of the two stator iron core petals in the previous embodiment.
  • 423 is merged with a joint portion structure 422 to form a composite structure 424, which reduces the number of the joint portion structure 422 or the support portion structure 423, thereby reducing the weight of the material and
  • the insulating structure 42 is an injection-molded body, and the thin-walled structure 421 is formed with an injection-molding process hole 4211.
  • the injection-molding process hole 4211 may be a regular or irregular hole structure, and plays a role of supporting the core body 41 in the injection molding process.
  • the electric fan further includes a stator core 4 and a mounting base 5.
  • the stator core 4 is mounted inside one end of the casing 3, and the mounting base 5 is mounted on the stator.
  • the end of the iron core 4 far from the casing 3 is provided with a terminal slot for receiving the terminal 6 on the mounting base 5.
  • the stator assembly is formed by pulling the terminals between the mounting base 5 and the stator core 4 by pulling wires.
  • an end plate is installed at an end of the mounting seat 5 remote from the stator core 4, and the stator assembly and the end plate are connected by welding with a terminal 6.
  • the end plate is a PC board 7, and the stator assembly and the PC board 7 are connected by welding with six terminals 6.
  • the electric fan includes a wind hood 1, a rotor assembly 2, an integrated casing 3, a stator core 4, a plastic mount 5, terminals 6 and a PC board 7.
  • the cover 1 is installed outside the one end of the integrated casing 3, and the stator core 4 is installed inside the other end of the integrated casing 3.
  • the integrated casing 3 is integrally injection-molded of the diffuser blade 32 and the support casing 31, including bearings Chamber 33, iron core fixing structure;
  • the air inlet of the wind hood 1 is horn-shaped, a predetermined position rib 312 is provided on the side 311 of the matching between the wind hood 1 and the casing 3, and the wind hood 1 and the integrated casing 3 pass through the
  • the positioning of the positioning plane 14 and the surface of the diffuser blade 32 realizes the axial positioning of the windshield;
  • the rotor assembly 2 includes a moving impeller 22, a bearing 21 and a magnetic ring 23, and the rotor assembly 2 and the casing 3 are fixed by glue;
  • the stator The core 4 includes a core yoke 411, a plurality of core teeth 412, and an insulation structure 42 wrapped around the core.
  • the stator core 4 and the integrated casing 3 use an iron core positioning groove on the casing 3. 35 to achieve the predetermined position, and then use screws to achieve full positioning; plastic mounting base 5 contains terminal slot and fixing knot , The plastic mounting base 5 and the stator core 4 are firstly positioned by a predetermined structure (such as the positioning hole 4231 on the support structure 423), and then are fully positioned by pulling the wire and hitting the terminal 6; the PC board 7 is through the terminal 6 (Preferably six terminals 6) Welding to achieve fixing.
  • a predetermined structure such as the positioning hole 4231 on the support structure 423
  • stator core 4, the casing 3, and the PC board 7 are connected by screws.
  • the electric fan may be a high-speed electric fan.
  • the electric fan provided by the present invention can effectively improve the accuracy of the air duct assembly and reduce the energy loss of the air duct.
  • the stator core structure of the electric fan can reduce the weight of the whole machine and reduce the use in high frequency applications.
  • the iron loss of the motor in the occasion; at the same time, the electric fan provided by the invention has the characteristics of small vibration, low noise and high fan efficiency.
  • connection may be a fixed connection or may be removable.
  • specific meanings of the above terms in the present invention can be understood according to specific situations.

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Abstract

一种电风机，包括转子组件（2）和机壳（3），转子组件（2）包括轴承（21）、动叶轮（22）和磁环（23），磁环（23）和动叶轮（22）分别安装于轴承（21）的两端；机壳（3）具有轴承室（33），磁环（23）的直径小于轴承室（33）的直径，磁环（23）能够穿过轴承室（33），动叶轮（22）和磁环（23）分别位于轴承室（33）两端。该电风机装配工艺简化，有利于提高装配效率。

Description

电风机
本申请要求于2018年09月30日提交中国专利局、申请号为201811162788.0、发明创造名称为“电风机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及电风机技术领域，具体而言，涉及一种电风机，尤其是一种高速电风机。
背景技术
现有的电风机，通常通过安装的转轴两端的两个轴承支撑转轴，为保证电风机工作的可靠性，需保证两个轴承具有较高的同轴度，造成对电风机的装配精度要求高，且装配复杂。
发明内容
本发明旨在解决上述技术问题至少之一。
为此，本发明的目的在于，提供一种电风机。
为了实现上述目的，本发明的技术方案提供了一种电风机，包括：转子组件，所述转子组件包括轴承、动叶轮和磁环，所述磁环和所述动叶轮分别安装于所述轴承的两端；和机壳，所述机壳具有轴承室，所述磁环的直径小于所述轴承室的直径，所述磁环能够穿过所述轴承室，所述动叶轮和所述磁环分别位于所述轴承室两端。
本发明上述技术方案提供的电风机，仅使用一个轴承，且轴承位于转轴的动叶轮和磁环之间，装配时，磁环穿过轴承室，安装完成后，动叶轮和磁环分别位于轴承室的两端，这种转子组件和机壳的装配方式，装配方便，装配工艺简化；由于仅使用一个轴承，因此对转子组件和机壳的装配精度要求低，有利 于提高装配效率；并且减少了电风机的部件数量，有利于降低产品成本，并进一步提高装配效率。
另外，本发明上述技术方案中提供的电风机还可以具有如下附加技术特征：
在上述技术方案中，优选地，所述轴承室内设有沿径向向内延伸形成的环形台阶，所述磁环能够从所述环形台阶的中部穿过，所述轴承被所述环形台阶限位在所述轴承室内。
利用环形台阶对轴承进行轴向限位，以确保轴承的装配位置精度，并避免轴承从轴承室内脱出。
在上述技术方案中，优选地，所述机壳为注塑机壳，所述轴承室内设有轴承定位孔，所述轴承定位孔的内壁上开设有含胶槽，所述轴承安装在所述轴承室内，所述轴承与所述轴承定位孔之间过渡配合；或所述机壳为注塑机壳，所述轴承室内设有轴承定位孔，所述轴承定位孔的内壁上开设有含胶槽，所述轴承室内安装有轴承套，所述轴承套与所述轴承定位孔之间过渡配合，所述轴承安装在所述轴承套内。
机壳采用非金属材料的注塑机壳，能够降低电机损耗，从而提高电机效率；同时，注塑机壳较金属机壳不会发生涡流产生热量，相应地降低了轴承外部工作环境温度，提高了轴承可靠性；轴承室内有轴承定位孔，轴承定位孔与轴承(或轴承套)之间采用过渡配合，实现轴承预定位，保证轴承安装同轴度，有利于提高轴承的装配精度，保证轴承工作的可靠性；且注塑机壳的轴承室与轴承之间可以采用热固型胶水粘接固定，胶水流到并填充至含胶槽内，实现轴承室与轴承(或轴承套)之间的牢固粘接，从而保证轴承在高温工作环境下的可靠性；而且注塑机壳从制造成本及重量上均优于金属机壳。
在上述技术方案中，优选地，所述电风机还包括风罩，所述风罩安装在所述机壳一端的外部，所述机壳和所述风罩之间具有适配的配合侧面，其中一所述配合侧面上设有朝另一所述配合侧面凸出的预定位筋。
在机壳与风罩之间的配合侧面上设置预定位筋，预定位筋在风罩与机壳装配时起到预定位作用，从而保证风罩与安装在风罩内侧的动叶轮之间的间隙，控制风道装配精度，防止装配过程中风罩与动叶轮间隙偏差造成摩擦，从而保 证电风机性能稳定，并降低因风道部分的装配精度差而产生的振动噪音，进而保证电风机的工作效率及工作时的可靠性，具有振动小、噪音小、风机效率高等优点。
在上述技术方案中，优选地，所述电风机还包括风罩，所述风罩安装在所述机壳一端的外部，所述风罩的入风口处形成有内倒角，所述入风口成开放式喇叭口形状。
上述方案，可减小入风口风阻，增大入风口处空气流量，并使空气在入风口处的流场更顺畅，有利于提高电风机的工作效率，并降低气流噪音，从而能明显提高电风机性能。
在上述技术方案中，优选地，所述机壳包括支撑外壳及设于所述支撑外壳上的扩压器叶片，所述扩压器叶片与所述支撑外壳一体注塑成型。
扩压器叶片与支撑外壳一体注塑成型，成为一体式注塑机壳，省去扩压器叶片与机壳的装配工序，保证扩压器叶片平面与机壳的轴承室止口尺寸精度，提高风道系统的装配精密度，从而改善电风机性能，并降低因风道部分的装配精度差而产生的振动噪音；并且扩压器叶片、机壳整体式注塑可解决扩压器叶片风道内脱模痕迹问题；以上保证了风道顺畅及装配一致性，进而保证电风机性能稳定；同时，一体式注塑机壳相较于金属机壳，降低了整机重量及制造成本。
在上述技术方案中，优选地，所述电风机还包括风罩，所述风罩安装在所述机壳一端的外部，所述风罩具有背向所述风罩的入风口端端面设置的定位平面，所述扩压器叶片朝向所述定位平面的表面与所述定位平面贴合。
风罩与一体式机壳通过风罩上的定位平面与扩压器叶片的表面贴合实现对风罩的轴向定位，便于风罩与机壳之间进行打胶操作。
在上述技术方案中，优选地，所述电风机还包括风罩，所述风罩安装在所述机壳一端的外部，所述风罩包括风罩本体及设于所述风罩本体上的扩压器叶片，所述扩压器叶片与所述风罩本体一体注塑成型。
扩压器叶片与风罩本体采用整体式注塑，可避免扩压器叶片与风罩之间的装配间隙，进而保证风道系统密闭性，减小流体沿程损失，可提高电风机性能。
在上述任一技术方案中，优选地，所述电风机还包括定子铁芯，所述机壳 上设有铁芯固定座，所述铁芯固定座上设有铁芯定位槽，所述铁芯固定座能够沿轴向定位所述定子铁芯，所述铁芯定位槽能够沿周向定位所述定子铁芯。
定子铁芯与机壳装配时，利用铁芯固定座实现轴向定位定子铁芯，利用铁芯定位槽实现周向定位定子铁芯，从而便于后序采用胶粘方式或打螺钉方式全方位固定定子铁芯。
在上述任一技术方案中，优选地，所述电风机还包括定子铁芯，所述定子铁芯由至少两瓣定子铁芯瓣拼合而成，每瓣所述定子铁芯瓣包括铁芯主体和绝缘结构，所述绝缘结构包括包裹在所述铁芯主体外围的薄壁结构、及由所述薄壁结构向外侧延伸的拼合部结构，所述拼合部结构用于拼合相邻两瓣所述定子铁芯瓣。
定子铁芯的绝缘结构不仅承担电绝缘的功能，还承担拼合紧固各瓣定子铁芯瓣的作用，相比于现有技术中由定子铁芯自拼合结构，本发明方案减轻了定子铁芯的重量，并降低了定子铁芯铁损，从而提高了电机的性能；并且该种定子铁芯可提高定子铁芯片间结合力及定子铁芯结构阻尼，从而降低电机的噪音与振动。
在上述技术方案中，优选地，所述绝缘结构还包括由所述薄壁结构向外侧延伸的支撑部结构，所述支撑部结构上设有定位孔或定位凸起，所述定位孔或定位凸起用于与所述电风机的安装座配合实现预定位。
定子铁芯的绝缘结构还起到承担总装中支撑整个定子铁芯的作用，并利用设计在支撑部结构上定位孔或定位凸起，实现安装座与定子铁芯装配时的预定位作用，便于后序安装座与定子铁芯间的固定与接线。
在上述技术方案中，优选地，所述铁芯主体包括铁芯轭部、至少一个铁芯齿部和两个子铁芯齿部，两个所述子铁芯齿部均设于所述铁芯轭部的内侧且位于所述铁芯轭部的周向两端，所述铁芯齿部设于所述铁芯轭部的内侧且位于两个所述子铁芯齿部之间；所述绝缘结构包括两个分别与两个所述子铁芯齿部一一相对、且沿所述子铁芯齿部远离中心的方向延伸的所述拼合部结构，以及至少一个与所述铁芯齿部相对、且沿所述铁芯齿部远离中心的方向延伸的所述支撑部结构。
拼合部结构与子铁芯齿部相对，有利于提高拼合部结构的结构强度，从而 提高相邻两瓣定子铁芯瓣利用拼合部结构进行拼合的结构强度，进而提高定子铁芯的整体强度；支撑部结构与铁芯齿部相对，有利于提高支撑部结构的结构强度，从而提高支撑部结构对整个定子铁芯的支撑强度。
在上述任一技术方案中，优选地，所述电风机还包括定子铁芯和安装座，所述定子铁芯安装在所述机壳一端的内部，所述安装座安装在所述定子铁芯远离所述机壳的一端，所述安装座上设有用于容置端子的接线端子槽，所述安装座与所述定子铁芯之间通过拉线打端子组成定子总成。
在上述技术方案中，优选地，所述安装座远离所述定子铁芯的一端安装有端板，所述定子总成与所述端板之间通过端子焊接实现连接。
上述方案，优选地，所述端板为PC板。
本发明的附加方面和优点将在下面的描述部分中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是本发明一个实施例的电风机的分解结构示意图；
图2是本发明一个实施例的电风机的剖视结构示意图；
图3是本发明一个实施例的机壳的结构示意图；
图4是图3所示机壳另一视角的结构示意图；
图5是图3所示机壳与转子组件及风罩的装配结构示意图；
图6是本发明另一个实施例的风罩的结构示意图；
图7是图6所示风罩的剖视结构示意图；
图8是图6所示风罩与转子组件及机壳的装配结构示意图；
图9是本发明又一个实施例的机壳的结构示意图；
图10是图9所示机壳另一视角的结构示意图；
图11是图9所示机壳、转子组件及定子铁芯的装配结构示意图；
图12是图11中A-A向的剖视结构示意图；
图13是本发明再一个实施例的机壳与轴承套的结构示意图；
图14是图13所示机壳、转子组件及定子铁芯的装配结构示意图；
图15是图14中B-B向的剖视结构示意图；
图16是本发明一个实施例的铁芯主体的结构示意图；
图17是本发明一个实施例的绝缘结构的结构示意图；
图18是本发明一个实施例的定子铁芯瓣的结构示意图；
图19是本发明一个实施例的定子铁芯瓣拼合完成后的结构示意图；
图20是本发明另一个实施例的定子铁芯瓣拼合前的结构示意图；
图21是图20所示定子铁芯瓣拼合完成后的结构示意图。
其中，图1至图21中的附图标记与部件名称之间的对应关系为：
1风罩，11内倒角，12配合侧面，13预定位筋，14定位平面，15风罩本体，16扩压器叶片，2转子组件，20转轴，21轴承，22动叶轮，23磁环，3机壳，31支撑外壳，311配合侧面，312预定位筋，32扩压器叶片，33轴承室，330环形台阶，331轴承定位孔，332含胶槽，34铁芯固定座，35铁芯定位槽，4定子铁芯，41铁芯主体，411铁芯轭部，412铁芯齿部，413子铁芯齿部，42绝缘结构，421薄壁结构，4211注塑工艺孔，422拼合部结构，4221凸起部，4222凹陷部，423支撑部结构，4231定位孔，424复合结构，5安装座，6端子，7PC板，8轴承套。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。
下面参照图1至图21描述根据本发明一些实施例所述的电风机。
如图1至图21所示，根据本发明的一些实施例提供的一种电风机，包括：转子组件2和机壳3。
具体地，如图2所示，转子组件2包括轴承21、动叶轮22和磁环23，轴 承21、动叶轮22和磁环23(即转子)均安装在转轴20上，磁环23设于远离动叶轮22的一侧，磁环23的直径小于轴承21的直径，磁环23和动叶轮22分别安装于轴承21的两端；机壳3具有轴承室33，磁环23的直径小于轴承室33的直径，磁环23能够穿过轴承室33，安装完成后，动叶轮22和磁环23分别位于轴承室33两端。
本发明上述实施例提供的电风机，仅使用一个轴承21，且轴承21位于转轴20的动叶轮22和磁环23之间，装配时，磁环23穿过轴承室33，安装完成后，动叶轮22和磁环23分别位于轴承室33的两端，这种转子组件2和机壳3的装配方式，装配方便，装配工艺简化；由于仅使用一个轴承21，因此对转子组件2和机壳3的装配精度要求低，有利于提高装配效率；并且减少了电风机的部件数量，有利于降低产品成本，并进一步提高装配效率。
进一步地，如图2所示，轴承室33内设有沿径向向内延伸形成的环形台阶330，磁环23能够从环形台阶330的中部穿过，轴承21被环形台阶330限位在轴承室33内，利用环形台阶330对轴承21进行轴向限位，以确保轴承21的装配位置精度，并避免轴承21从轴承室33内脱出。
优选地，如图3、图9和图13所示，机壳3为注塑机壳，机壳3的轴承室33内设有轴承定位孔331，轴承定位孔331的内壁上开设有含胶槽332；如图11和图12所示，转子组件2的轴承21安装在轴承室33内，轴承21与轴承定位孔331之间过渡配合，轴承21与轴承室33之间采用热固型胶水粘接固定。
可选地，如图3、图9和图13所示，机壳3为注塑机壳，机壳3的轴承室33内设有轴承定位孔331，轴承定位孔331的内壁上开设有含胶槽332，轴承室33内安装有轴承套8，轴承套8与轴承定位孔331之间过渡配合，轴承套8与轴承室3之间采用热固型胶水粘接固定；如图14和图15所示，转子组件2的轴承21安装在轴承套8内，轴承套8与轴承21之间间隙配合，并采用金属粘金属的胶水粘接固定。
机壳3采用非金属材料的注塑机壳，能够降低电机损耗，从而提高电机效率；同时，注塑机壳较金属机壳不会发生涡流产生热量，相应地降低了轴承外部工作环境温度，提高了轴承可靠性；轴承室33内有轴承定位孔331，轴承 定位孔331与轴承21(或轴承套8)之间采用过渡配合，实现轴承预定位，保证轴承安装同轴度，有利于提高轴承的装配精度，保证轴承工作的可靠性；且注塑机壳的轴承室33与轴承21之间可以采用热固型胶水粘接固定，胶水流到并填充至含胶槽332内，实现轴承室33与轴承21(或轴承套8)之间的牢固粘接，从而保证轴承在高温工作环境下的可靠性；而且注塑机壳从制造成本及重量上均优于金属机壳。
在本发明的一些实施例中，如图3至图8所示，电风机还包括风罩1，风罩1安装在机壳3一端的外部，机壳3和风罩1之间具有适配的配合侧面，其中一配合侧面上设有朝另一配合侧面凸出的预定位筋。
可选地，如图3所示，机壳3具有与风罩1适配的配合侧面311，配合侧面311上设有预定位筋312；可选地，如图6所示，风罩1具有与机壳3适配的配合侧面12，配合侧面12上设有预定位筋13。
上述实施例，在机壳3与风罩1的配合侧面上设置预定位筋，预定位筋在风罩1与机壳3装配时起到预定位作用，从而保证风罩1与安装在风罩1内侧的动叶轮22之间的间隙，控制风道装配精度，防止装配过程中风罩1与动叶轮22间隙偏差，造成摩擦，从而保证电风机性能稳定，并降低因风道部分的装配精度差而产生的振动噪音，进而保证电风机的工作效率及工作时的可靠性，具有振动小、噪音小、风机效率高等优点。
优选地，如图2、图5、图7和图8所示，风罩1的入风口处形成有内倒角11，入风口成开放式喇叭口形状，可减小入风口风阻，能明显提高电风机性能。
优选地，如图5和图8所示，风罩1设于动叶轮22的外侧，内倒角11远离风罩1的入风口端端面的一端记作尾端，内倒角11的尾端不低于动叶轮22叶片的尖部；优选地，内倒角11的尾端和与其相连的风罩1的内侧壁面平滑过渡连接，从而使得空气在风罩1内的流场更顺畅，有利于进一步提高电风机性能。
在本发明的一个实施例中，如图1至图5所示，机壳3包括支撑外壳31及设于支撑外壳31上的扩压器叶片32，扩压器叶片32与支撑外壳31一体注塑成型。
扩压器叶片32与支撑外壳31一体注塑成型，成为一体式注塑机壳3，省去扩压器叶片32与机壳3的装配工序，保证扩压器叶片32平面与机壳3的轴承室33止口尺寸精度，提高风道系统的装配精密度，从而改善电风机性能，并降低因风道部分的装配精度差而产生的振动噪音；并且扩压器叶片32、支撑外壳31整体式注塑可解决扩压器叶片风道内脱模痕迹问题；以上保证了风道顺畅及装配一致性，进而保证电风机性能稳定；同时，一体式注塑机壳3相较于金属机壳，降低了整机重量及制造成本。
进一步地，如图5所示，风罩1具有背向风罩1的入风口端端面设置的定位平面14，扩压器叶片32朝向定位平面14的表面与定位平面14贴合，实现对风罩1的轴向定位，便于风罩1与机壳3之间进行打胶操作。
在本发明的另一个实施例中，如图6至图8所示，风罩1包括风罩本体15及设于风罩本体15上的扩压器叶片16，扩压器叶片16与风罩本体15一体注塑成型。
扩压器叶片16与风罩本体15采用整体式注塑，可避免扩压器叶片16与风罩1之间的装配间隙，进而保证风道系统密闭性，减小流体沿程损失，可提高电风机性能。
在本发明的一些实施例中，电风机还包括定子铁芯4，如图4和图10所示，机壳3上设有铁芯固定座34，铁芯固定座34上设有铁芯定位槽35，铁芯固定座34能够沿轴向定位定子铁芯4，铁芯定位槽35能够沿周向定位定子铁芯4。
定子铁芯4与机壳3装配时，利用铁芯固定座34实现轴向定位定子铁芯4，利用铁芯定位槽35实现周向定位定子铁芯4，从而便于后序采用胶粘方式或打螺钉方式全方位固定定子铁芯4。
在本发明的一些实施例中，如图16至图21所示，定子铁芯4由至少两瓣定子铁芯瓣拼合而成，每瓣定子铁芯瓣包括铁芯主体41和绝缘结构42，绝缘结构42包括包裹在铁芯主体41外围的薄壁结构421、及由薄壁结构421向外侧延伸的拼合部结构422，拼合部结构422用于拼合相邻两瓣定子铁芯瓣。
进一步地，如图16至图21所示，绝缘结构42还包括由薄壁结构421向外侧延伸的支撑部结构423，支撑部结构423上设有定位孔4231或定位凸起， 定位孔4231或定位凸起用于与电风机的安装座5配合实现预定位。
定子铁芯4的绝缘结构42不仅承担电绝缘的功能，还承担拼合紧固各瓣定子铁芯瓣及总装中支撑整个定子铁芯4的作用的功能，相比于现有技术中由定子铁芯4自拼合、自支撑结构，本发明方案减轻了定子铁芯4的重量，并降低了定子铁芯4铁损，从而提高了电机的性能；并且该种定子铁芯4可提高定子铁芯4片间结合力及定子铁芯4结构阻尼，从而降低电机的噪音与振动；定子铁芯4与安装座5装配时，利用设计在支撑部结构423上定位孔4231或定位凸起，实现安装座5与定子铁芯4装配时的预定位作用，便于后序安装座5与定子铁芯4间的固定与接线。
优选地，如图16至图21所示，铁芯主体41包括铁芯轭部411、至少一个铁芯齿部412和两个子铁芯齿部413，两个子铁芯齿部413均设于铁芯轭部411的内侧且位于铁芯轭部411的周向两端，铁芯齿部412设于铁芯轭部411的内侧且位于两个子铁芯齿部413之间；绝缘结构42包括两个分别与两个子铁芯齿部413一一相对、且沿子铁芯齿部413远离中心的方向延伸的拼合部结构422，以及至少一个与铁芯齿部412相对、且沿铁芯齿部412远离中心的方向延伸的支撑部结构423。
拼合部结构422与子铁芯齿部413相对，有利于提高拼合部结构422的结构强度，从而提高相邻两瓣定子铁芯瓣利用拼合部结构422进行拼合的结构强度，进而提高定子铁芯4的整体强度；支撑部结构423与铁芯齿部412相对，有利于提高支撑部结构423的结构强度，从而提高支撑部结构423对整个定子铁芯4的支撑强度。
在本发明的一个具体实施例中，如图16至图19所示，定子铁芯4由两瓣定子铁芯瓣拼合而成，每瓣定子铁芯瓣的铁芯齿部412的数量为两个且沿铁芯轭部411的周向间隔设置，每瓣定子铁芯瓣的绝缘结构42包括两个拼合部结构422，两个拼合部结构422分设于薄壁结构421的周向两端，其中一拼合部结构422上设有凸起部4221、另一拼合部结构422上设有凹陷部4222，相邻两瓣定子铁芯瓣之间通过一拼合部结构422的凸起部4221与另一拼合部结构422的凹陷部4222的配合实现拼合；每瓣定子铁芯瓣的绝缘结构42还包括两个支撑部结构423，两个支撑部结构423分别与两个铁芯齿部412相对、且沿 与之相对的铁芯齿部412远离中心的方向延伸，每个支撑部结构423上设置有定位孔4231。
在本发明的另一个具体实施例中，如图20和图21所示，定子铁芯4由两瓣定子铁芯瓣拼合而成，每瓣定子铁芯瓣的铁芯齿部412的数量为两个且沿铁芯轭部411的周向间隔设置，每瓣定子铁芯瓣的绝缘结构42包括两个拼合部结构422，两个拼合部结构422分设于薄壁结构421的周向两端，其中一拼合部结构422上设有凸起部4221、另一拼合部结构422上设有凹陷部4222，相邻两瓣定子铁芯瓣之间通过一拼合部结构422的凸起部4221与另一拼合部结构422的凹陷部4222的配合实现拼合；每瓣定子铁芯瓣的绝缘结构42还包括两个支撑部结构423，其中一个支撑部结构423与两个铁芯齿部412中的一个相对、且沿与之相对的铁芯齿部412远离中心的方向延伸，该支撑部结构423上设置有定位孔4231；另一个支撑部结构423与其中一拼合部结构422进行合并形成复合结构424。
具体地，在相拼合的两个复合结构424中，其中一半复合结构424上设有小于半圆的第一定位孔、另一半复合结构424上设有大于半圆的第二定位孔，两半复合结构424拼合，使得第一定位孔和第二定位孔拼合成一个整圆的定位孔4231；并且其中一半复合结构424上设有凸起部4221、另一半复合结构424上设有凹陷部4222，两半复合结构424拼合，使得凸起部4221和凹陷部4222配合实现两瓣定子铁芯瓣的拼合；也即该实施例是将上面一个实施例中两瓣定子铁芯瓣的两处支撑部结构423与一处拼合部结构422进行合并形成复合结构424，减少拼合部结构422或支撑部结构423的数量，从而减轻材料重量，进而减轻了定子铁芯4的重量。
优选地，绝缘结构42为注塑体，薄壁结构421上成型有注塑工艺孔4211，注塑工艺孔4211可以为规则或不规则孔结构，在注塑工艺中起支撑铁芯主体41的作用。
在本发明的一个实施例中，如图1和图2所示，电风机还包括定子铁芯4和安装座5，定子铁芯4安装在机壳3一端的内部，安装座5安装在定子铁芯4远离机壳3的一端，安装座5上设有用于容置端子6的接线端子槽，安装座5与定子铁芯4之间通过拉线打端子组成定子总成。
进一步地，如图1和图2所示，安装座5远离定子铁芯4的一端安装有端板，定子总成与端板之间通过端子6焊接实现连接。
一个具体实施例中，端板为PC板7，定子总成与PC板7之间通过六个端子6焊接实现连接。
一个具体实施例中，如图1和图2所示，电风机包括风罩1、转子组件2、一体式机壳3、定子铁芯4、塑料安装座5、端子6和PC板7，风罩1安装在一体式机壳3一端的外部，定子铁芯4安装在一体式机壳3另一端的内部，一体式机壳3为扩压器叶片32与支撑外壳31整体式注塑，包括轴承室33、铁芯固定结构；风罩1入风口为喇叭状，风罩1与机壳3配合侧面311上设有预定位筋312，风罩1与一体式机壳3通过风罩1上的定位平面14与扩压器叶片32的表面定位实现风罩的轴向定位；转子组件2包括动叶轮22、轴承21与磁环23，转子组件2与机壳3之间采用胶粘固定；定子铁芯4包括铁芯轭部411、多个铁芯齿部412及包裹在铁芯外围的绝缘结构42，定子铁芯4与一体式机壳3之间采用机壳3上的铁芯定位槽35实现预定位，再通过胶粘亦可采用螺钉实现全定位；塑料安装座5包含接线端子槽及固定结构，塑料安装座5与定子铁芯4之间先通过预定位结构(如支撑部结构423上的定位孔4231)实现初定位，再通过拉线、打端子6实现全定位；PC板7通过端子6(优选为六个端子6)焊接实现固定。
可选地，定子铁芯4、机壳3、PC板7通过螺钉连接。
具体地，电风机可以为高速电风机。
综上所述，本发明发明提供的电风机，可有效提高风道装配精度，减小风道能量损失，同时此种电风机的定子铁芯结构可减轻整机重量，及降低在高频应用场合中电机的铁损；同时，本发明提供的电风机具有振动小、噪音小、风机效率高的特点。
本发明的描述中，需要理解的是，术语“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或单元必须具有特定的方向、以特定的方位构造和操作，因此，不能理解为对本发明的限制。
在本发明的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、 “固定”等均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接，或电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本说明书的描述中，术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或实例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (14)

  1. 一种电风机，其特征在于，包括：
    转子组件，所述转子组件包括轴承、动叶轮和磁环，所述磁环和所述动叶轮分别安装于所述轴承的两端；和
    机壳，所述机壳具有轴承室，所述磁环的直径小于所述轴承室的直径，所述磁环能够穿过所述轴承室，所述动叶轮和所述磁环分别位于所述轴承室两端。
  2. 根据权利要求1所述的电风机，其特征在于，
    所述轴承室内设有沿径向向内延伸形成的环形台阶，所述磁环能够从所述环形台阶的中部穿过，所述轴承被所述环形台阶限位在所述轴承室内。
  3. 根据权利要求1所述的电风机，其特征在于，
    所述机壳为注塑机壳，所述轴承室内设有轴承定位孔，所述轴承定位孔的内壁上开设有含胶槽，所述轴承安装在所述轴承室内，所述轴承与所述轴承定位孔之间过渡配合；或
    所述机壳为注塑机壳，所述轴承室内设有轴承定位孔，所述轴承定位孔的内壁上开设有含胶槽，所述轴承室内安装有轴承套，所述轴承套与所述轴承定位孔之间过渡配合，所述轴承安装在所述轴承套内。
  4. 根据权利要求1所述的电风机，其特征在于，
    所述电风机还包括风罩，所述风罩安装在所述机壳一端的外部，所述机壳和所述风罩之间具有适配的配合侧面，其中一所述配合侧面上设有朝另一所述配合侧面凸出的预定位筋。
  5. 根据权利要求1所述的电风机，其特征在于，
    所述电风机还包括风罩，所述风罩安装在所述机壳一端的外部，所述风罩的入风口处形成有内倒角，所述入风口成开放式喇叭口形状。
  6. 根据权利要求1所述的电风机，其特征在于，
    所述机壳包括支撑外壳及设于所述支撑外壳上的扩压器叶片，所述扩压器叶片与所述支撑外壳一体注塑成型。
  7. 根据权利要求6所述的电风机，其特征在于，
    所述电风机还包括风罩，所述风罩安装在所述机壳一端的外部，所述风罩具有背向所述风罩的入风口端端面设置的定位平面，所述扩压器叶片朝向所述定位平面的表面与所述定位平面贴合。
  8. 根据权利要求1所述的电风机，其特征在于，
    所述电风机还包括风罩，所述风罩安装在所述机壳一端的外部，所述风罩包括风罩本体及设于所述风罩本体上的扩压器叶片，所述扩压器叶片与所述风罩本体一体注塑成型。
  9. 根据权利要求1至8中任一项所述的电风机，其特征在于，
    所述电风机还包括定子铁芯，所述机壳上设有铁芯固定座，所述铁芯固定座上设有铁芯定位槽，所述铁芯固定座能够沿轴向定位所述定子铁芯，所述铁芯定位槽能够沿周向定位所述定子铁芯。
  10. 根据权利要求1至8中任一项所述的电风机，其特征在于，
    所述电风机还包括定子铁芯，所述定子铁芯由至少两瓣定子铁芯瓣拼合而成，每瓣所述定子铁芯瓣包括铁芯主体和绝缘结构，所述绝缘结构包括包裹在所述铁芯主体外围的薄壁结构、及由所述薄壁结构向外侧延伸的拼合部结构，所述拼合部结构用于拼合相邻两瓣所述定子铁芯瓣。
  11. 根据权利要求10所述的电风机，其特征在于，
    所述绝缘结构还包括由所述薄壁结构向外侧延伸的支撑部结构，所述支撑部结构上设有定位孔或定位凸起，所述定位孔或定位凸起用于与所述电风机的安装座配合实现预定位。
  12. 根据权利要求11所述的电风机，其特征在于，
    所述铁芯主体包括铁芯轭部、至少一个铁芯齿部和两个子铁芯齿部，两个所述子铁芯齿部均设于所述铁芯轭部的内侧且位于所述铁芯轭部的周向两端，所述铁芯齿部设于所述铁芯轭部的内侧且位于两个所述子铁芯齿部之间；
    所述绝缘结构包括两个分别与两个所述子铁芯齿部一一相对、且沿所述子铁芯齿部远离中心的方向延伸的所述拼合部结构，以及至少一个与所述铁芯齿部相对、且沿所述铁芯齿部远离中心的方向延伸的所述支撑部结构。
  13. 根据权利要求1至8中任一项所述的电风机，其特征在于，
    所述电风机还包括定子铁芯和安装座，所述定子铁芯安装在所述机壳一端的内部，所述安装座安装在所述定子铁芯远离所述机壳的一端，所述安装座上设有用于容置端子的接线端子槽，所述安装座与所述定子铁芯之间通过拉线打端子组成定子总成。
  14. 根据权利要求13所述的电风机，其特征在于，
    所述安装座远离所述定子铁芯的一端安装有端板，所述定子总成与所述端板之间通过端子焊接实现连接。
PCT/CN2018/115373 2018-09-30 2018-11-14 电风机 Ceased WO2020062479A1 (zh)

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