WO2021227483A1 - 旋转电机及风机 - Google Patents

旋转电机及风机 Download PDF

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Publication number
WO2021227483A1
WO2021227483A1 PCT/CN2020/135848 CN2020135848W WO2021227483A1 WO 2021227483 A1 WO2021227483 A1 WO 2021227483A1 CN 2020135848 W CN2020135848 W CN 2020135848W WO 2021227483 A1 WO2021227483 A1 WO 2021227483A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
electric machine
rotating electric
outer diameter
bearing seat
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/CN2020/135848
Other languages
English (en)
French (fr)
Inventor
于明湖
迟闯
左亚军
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 KR1020227016884A priority Critical patent/KR20220080193A/ko
Priority to JP2022528285A priority patent/JP7387897B2/ja
Priority to EP20935159.2A priority patent/EP4050762B1/en
Publication of WO2021227483A1 publication Critical patent/WO2021227483A1/zh
Priority to US17/826,581 priority patent/US12191742B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • 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
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/04—Balancing means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • This application relates to the technical field of electric motors, and in particular to a rotating electric machine and a fan.
  • stator In most current rotating electrical machines, there are many components of the rotating electrical machine, such as the stator, the stator support structure, the parts in the rotor, and the support structure of the rotor. Generally, there are multiple parts, and there are certain parts when any two adjacent parts are assembled. The allowable tolerance is higher, and the cumulative tolerance of multiple parts assembly will be higher, resulting in a reduction in the working performance and reliability of the rotating electrical machine.
  • One of the objectives of the embodiments of the present application is to provide a rotating electric machine, which aims to solve the problem of high accumulated tolerances in the assembly of multiple parts in the rotating electric machine in the related art, which reduces the working performance and reliability of the rotating electric machine.
  • a rotating electric machine including a stator, a rotor, and a supporting frame;
  • the rotor includes a rotating shaft, a permanent magnet mounted on the rotating shaft, and a first bearing and a second bearing mounted on opposite ends of the rotating shaft. Two bearings, the first bearing and the second bearing are respectively located at opposite ends of the permanent magnet;
  • the stator includes a stator yoke sleeved on the support frame, and a plurality of Stator teeth and coils respectively wound on each of the stator teeth;
  • the support frame includes a first bearing seat, a second bearing seat, and a plurality of support rods supporting the stator yoke.
  • the ends are respectively connected with the first bearing seat and the second bearing seat, there is a space between the two adjacent support rods for the stator teeth to be inserted, and the first bearing is installed on the first bearing
  • the second bearing is installed in the second bearing seat, the outer diameter of the permanent magnet is greater than or equal to the outer diameter of the second bearing, and the outer diameter of the first bearing is greater than or equal to The outer diameter of the permanent magnet.
  • a fan including the rotating electric machine described in any of the above embodiments and an impeller, the impeller being mounted on the rotating shaft.
  • the beneficial effect of the rotary electric machine is that the first bearing seat, the second bearing seat, and a plurality of support rods connecting the first bearing seat and the second bearing seat form a support frame, which can ensure the first bearing
  • the coaxiality of the housing and the second bearing housing can ensure good coaxiality of the first bearing and the second bearing when assembling the rotor and the support frame, and reduce the cumulative tolerance of the assembly; set the outer diameter of the permanent magnet to be larger than or It is equal to the outer diameter of the second bearing, and the outer diameter of the first bearing is greater than or equal to the outer diameter of the permanent magnet, the rotor can be directly installed on the support frame from one end of the first bearing seat, which is convenient for assembly; Assemble the rotor as a whole, and then install it in the support frame, which can better adjust and calibrate the dynamic balance of the rotor, ensure that the rotor can rotate smoothly and at high speed, reduce vibration, and reduce noise to ensure the working performance and reliability of the rotating motor sex.
  • the beneficial effect of the fan provided by the embodiment of the present application is that the fan uses the rotating electric machine of any of the above embodiments, which can ensure the performance and reliability of the rotating electric machine, and thereby ensure the stable and good operation of the fan.
  • FIG. 1 is a schematic structural diagram of a fan provided in Embodiment 1 of the application;
  • Figure 2 is a schematic diagram of the explosive structure of the fan shown in Figure 1;
  • FIG. 3 is a schematic cross-sectional view of the rotating electric machine provided in the first embodiment of the application, which is perpendicular to its axial direction;
  • FIG. 4 is a schematic cross-sectional structure diagram of a stator provided by an embodiment of the application.
  • FIG. 5 is a schematic cross-sectional structure view along the axial direction of the rotating electric machine according to the first embodiment of the application;
  • FIG. 6 is a schematic cross-sectional structure diagram of the rotor provided in the first embodiment of the application.
  • FIG. 7 is a schematic structural diagram of a supporting frame provided by an embodiment of the application.
  • FIG. 8 is a schematic diagram of the explosive structure of the fan provided in the second embodiment of the application.
  • FIG. 9 is a schematic cross-sectional structure view along the axial direction of the rotating electric machine according to the second embodiment of the application.
  • FIG. 10 is a schematic diagram of the structure of the support frame and the soft gasket provided by the embodiment of the application when they are disassembled;
  • Fig. 11 is a schematic sectional view of the first bearing seat when the support frame and the soft washer are assembled in Fig. 10;
  • FIG. 12 is a schematic diagram of the structure of the first soft washer provided by an embodiment of the application.
  • FIG. 13 is a schematic structural diagram of a second type of soft gasket provided by an embodiment of the application.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features.
  • “multiple” means two or more than two, unless otherwise specifically defined.
  • the meaning of “several” is one or more than one, unless otherwise specifically defined.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection.
  • Connected or integrally connected it may be mechanically connected; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication between two elements or the interaction relationship between two elements.
  • connection should be understood according to specific circumstances.
  • the fan 100 includes a rotating electric machine 10 and an impeller 61.
  • the rotating electric machine 10 includes a stator 30, a rotor 20 and a supporting frame 40.
  • the stator 30 includes a stator yoke 31, a plurality of stator teeth 32, and a coil 33 wound on each stator tooth 32; each stator tooth 32 is provided on the stator yoke 31, and the stator yoke 31 is mounted on On the support frame 40, the stator yoke 31 is arranged around the support frame 40 to support the stator yoke 31 through the support frame 40, which is convenient for supporting and fixing the stator 30, and positioning the stator teeth 32 to ensure that the stator teeth 32 are identical. Axial degree to better ensure the performance of the rotating electric machine 10.
  • the support frame 40 includes a first bearing seat 41, a second bearing seat 42 and a plurality of support rods 43.
  • the opposite ends of each support rod 43 are respectively connected to the first bearing seat 41 and the second bearing seat 42. That is, the support frame 40 includes a plurality of support rods 43, a first bearing seat 41, and a second bearing seat 42.
  • the first bearing seat 41 is connected to one end of each support rod 43
  • the second bearing seat 42 is connected to the other end of each support rod 43.
  • Two adjacent support rods 43 are arranged at intervals.
  • the support rod 43 is used to support the stator yoke 31, and two adjacent support rods 43 are spaced apart, so that a space 44 is formed between two adjacent support rods 43, and the stator teeth 32 can be located between two adjacent support rods 43. Formed in the interval space 44.
  • the multiple support rods 43 connect the first bearing seat 41 and the second bearing seat 42 to ensure good coaxiality between the first bearing seat 41 and the second bearing seat 42.
  • the rotor 20 includes a rotating shaft 21, a permanent magnet 22, a first bearing 23, and a second bearing 24.
  • the permanent magnet 22 is mounted on the rotating shaft 21 so that the stator 30 drives the rotating shaft 21 to rotate.
  • the first bearing 23 and the second bearing 24 are respectively installed at opposite ends of the rotating shaft 21, and the first bearing 23 and the second bearing 24 are respectively located at opposite ends of the permanent magnet 22; to stably support the rotating shaft 21 and ensure that the rotating shaft 21 is flexible Rotate.
  • the outer diameter D1 of the first bearing 23 is set equal to the inner diameter d1 of the first bearing seat 41.
  • the first bearing 23 is installed in the first bearing seat 41 in a clearance fit to facilitate the fit between the first bearing 23 and the first bearing seat 41, to facilitate the installation of the first bearing 23 in the first bearing seat 41, and to ensure the first bearing
  • the coaxiality of the bearing 23 and the first bearing seat 41 is also convenient for calibrating the dynamic balance of the rotor 20.
  • the outer diameter D2 of the second bearing 24 is set to be equal to the inner diameter d2 of the second bearing seat 42.
  • the second bearing 24 can be installed in the second bearing seat 42 with a good clearance fit.
  • the second bearing 24 is installed in the second bearing housing 42 with clearance fit to facilitate the cooperation of the second bearing 24 and the second bearing housing 42 to facilitate the installation of the second bearing 24 in the second bearing housing 42 and to ensure the second bearing
  • the coaxiality of the bearing 24 and the second bearing seat 42 is also convenient for calibrating the dynamic balance of the rotor 20.
  • the outer diameter D3 of the permanent magnet 22 is greater than or equal to the outer diameter D2 of the second bearing 24, and the outer diameter D3 of the permanent magnet 22 is less than or equal to the first bearing 23
  • the outer diameter D1 is better to insert and install the rotor 20 from one end of the first bearing seat 41, which is convenient for assembly, and before assembling the rotor 20, the rotor 20 can be assembled separately into a whole, and then installed on the support frame 40 , The dynamic balance of the rotor 20 can be better adjusted.
  • this structure can make the end of the support frame 40 close to the first bearing seat 41 larger, ensure the strength of the support frame 40, and can reduce the size of the motor.
  • the impeller 61 is installed on the rotating shaft 21 so that the rotating electric machine 10 forms a fan 100 structure.
  • the rotating electric machine 10 can also be used in other devices that need to use the rotating electric machine 10, that is, the rotating shaft 21 can also be connected to other loads, such as connecting a grinding wheel, to form an electric grinding wheel; 10Apply to razor etc.
  • the support frame 40 is formed by arranging a first bearing seat 41, a second bearing seat 42 and a plurality of support rods 43 connecting the first bearing seat 41 and the second bearing seat 42, which can ensure a good guarantee
  • the coaxiality of the first bearing seat 41 and the second bearing seat 42 can ensure the good coaxiality of the first bearing 23 and the second bearing 24 when assembling the rotor 20 and the support frame 40, and reduce the cumulative tolerance of assembly;
  • Set the outer diameter D3 of the permanent magnet 22 to be greater than or equal to the outer diameter D2 of the second bearing 24, and set the outer diameter D1 of the first bearing 23 to be greater than or equal to the outer diameter D3 of the permanent magnet 22, then the first bearing seat 41
  • the rotor 20 is directly installed on the supporting frame 40 at one end of the, which is convenient for assembly; and the rotor 20 can be assembled as a whole, and then installed in the supporting frame 40, so that the dynamic balance of the rotor 20 can be better adjusted and calibrated. It is
  • the fan 100 provided by the embodiment of the present application uses the above-mentioned rotating electric machine 10, which can ensure the performance and reliability of the rotating electric machine 10, thereby ensuring the stable and good operation of the fan 100.
  • the inner circular hole of the stator tooth 32 specifies the inner circular hole surrounded by the plurality of stator teeth 32 in the sub 30; the inner diameter d4 of the inner circular hole of the stator tooth 32 It is larger than the outer diameter d3 of the second bearing housing 42, so that when the stator 30 is installed, the stator 30 can be sleeved on the support frame 40 from one end of the second bearing housing 42 to facilitate the positioning and fixing of the support frame 40 and the stator 30.
  • the stator teeth 32 of the stator 30 can be positioned to ensure the coaxiality of the plurality of stator teeth 32, thereby facilitating the rotation of the rotor 20.
  • the rotor 20 and the support frame 40 can be assembled first, so that the overall structure formed by the rotor 20 and the support frame 40 can be dynamically balanced and calibrated, and the shaft 21, the first bearing 23, and the first bearing 23 can be ensured.
  • the second bearing 24, the first bearing seat 41 and the second bearing seat 42 have good coaxiality, which reduces the accumulated tolerance of assembly.
  • the stator yoke 31 can be positioned by the support rod 43, and then the stator teeth 32 can be positioned to ensure the assembly accuracy of the stator 30 and the electromagnetic air gap between the stator 30 and the rotor 20.
  • the first bearing 23 is adhesively fixed in the first bearing seat 41 to ensure that the outer ring of the first bearing 23 is fixed to the first bearing seat 41.
  • the first bearing 23 may be fixed on the rotating shaft 21 by bonding or interference fit, so as to ensure a good connection between the first bearing 23 and the rotating shaft 21.
  • the second bearing 24 is adhesively fixed in the second bearing housing 42 to ensure that the outer ring of the second bearing 24 is fixed to the second bearing housing 42.
  • the second bearing 24 may be fixed on the rotating shaft 21 by bonding or interference fit, so as to ensure a good connection between the second bearing 24 and the rotating shaft 21.
  • a balance ring 25 is also installed on the rotating shaft 21 to perform dynamic balance calibration, so as to better adjust the balance of the rotor 20 and ensure that the rotor 20 rotates in a balanced manner at a high speed.
  • the outer diameter of the balance ring 25 is less than or equal to the outer diameter D1 of the first bearing 23 so as to insert and install the rotor 20 from one end of the first bearing seat 41.
  • balance rings 25 are respectively installed at both ends of the permanent magnet 22 to better calibrate the dynamic balance, so that the rotating shaft 21 rotates smoothly at a high speed.
  • the outer diameter D4 of the balance ring 25a near the first bearing 23 is greater than or equal to the outer diameter D3 of the permanent magnet 22, and the outer diameter D5 of the balance ring 25b away from the first bearing 23 is less than or equal to the permanent magnet 22
  • the outer diameter D3 is so as to insert and install the rotor 20 from one end of the first bearing housing 41.
  • an induction magnetic ring 26 is installed on the rotating shaft 21 to sense the speed and angle of the rotating shaft 21.
  • the shaft 21 has a sensing terminal 212 and an output terminal 211.
  • the output terminal 211 is used to connect a load.
  • the output terminal 211 and the sensing terminal 212 are the two ends of the rotating shaft 21.
  • the magnetic ring 26 is arranged at the sensing end 212 of the rotating shaft 21, and this structure can facilitate the layout of the position of the sensing magnetic ring 26.
  • the outer diameter D6 of the induction magnetic ring 26 is less than or equal to the outer diameter D2 of the second bearing 24, so that the rotor 20 can be inserted and installed from one end of the first bearing seat 41.
  • the inductive magnetic ring 26 may also be assembled last, that is, the outer diameter D6 of the inductive magnetic ring 26 may be set to be greater than the outer diameter D2 of the second bearing 24.
  • At least one positioning protrusion 311 is provided on the inner surface of the stator yoke 31.
  • the positioning protrusion 311 is used to coordinate with the support rod 43 for positioning, so that when the stator 30 is installed, the stator yoke 31 can be positioned, the assembly accuracy of the stator 30 can be ensured, and the circumferential movement of the stator yoke 31 can be avoided.
  • positioning protrusions 311 are respectively provided on the inner surface of the stator yoke 31 corresponding to the positions of the support rods 43, and multiple positions on the stator yoke 31 can be positioned for better positioning.
  • the stator 30 is well positioned to ensure the assembly accuracy of the stator 30.
  • only one positioning protrusion 311 may be provided on the stator yoke 31.
  • the positioning protrusion 311 and a supporting rod 43 are positioned first, and then the stator 30 is installed.
  • a plurality of positioning protrusions 311 may also be provided on the stator yoke 31.
  • the stator yoke 31 is provided with positioning protrusions 311 on both sides corresponding to each support rod 43, and positioning grooves 312 are formed between two adjacent positioning protrusions 311.
  • the support rod 43 can be inserted into the corresponding positioning slot 312 to better position the stator yoke 31.
  • the stator yoke 31 is provided with positioning protrusions 311 on both sides of each support rod 43, which can better position and fix the stator yoke 31 on the support frame 40, so as to better position the support rod 43 and the stator yoke 31, and improve Assembly accuracy.
  • only a pair of positioning protrusions 311 may be provided on the stator yoke 31.
  • the positioning grooves 312 are formed between the pair of positioning protrusions 311.
  • the end of a support rod 43 may be inserted first.
  • the stator 30 is positioned in the positioning slot 312.
  • multiple pairs of positioning protrusions 311 may also be provided on the stator yoke 31.
  • the support rod 43 can be inserted into the positioning slot 312 by using an interference fit or a clearance fit to position the stator 30 well and avoid radial and circumferential movement.
  • glue can also be provided to bond and fix the side surface of the support rod 43 in the positioning groove 312 to better fix the stator 30.
  • the stator yoke 31 has a ring-shaped or frame-shaped structure to ensure that the magnetic circuit in the stator yoke 31 is unblocked.
  • the stator yoke 31 may be sleeved on the support frame 40 with an interference fit to achieve a fixed connection between the stator 30 and the support frame 40.
  • stator teeth 32 and the stator yoke 31 are integrally formed to facilitate processing and manufacture, ensure the strength of the manufactured stator yoke 31, and ensure that the magnetic circuit between the stator yoke 31 and the stator teeth 32 is smooth.
  • stator yoke 31 is adhesively fixed to the support rod 43 to fix the stator 30 to the support frame 40.
  • the support rod 43 of the support frame 40 is provided with a slot 431, and the slot 431 is located on the support rod 43 on the side close to the stator yoke 31, that is, open
  • the slot 431 is located on the outer surface of the support rod 43 along the radial direction of the rotating shaft 21, and the slot 431 extends along the length direction of the support rod 43.
  • a slot 431 is provided on the support rod 43.
  • the slot 431 can also contain excess glue to prevent the glue from overflowing or seeping out of the end of the stator 30, and avoiding other parts from affecting the reliability of the rotating electric machine 10 and deteriorating the airflow noise of the rotating electric machine 10.
  • the glue overflowing between the stator yoke 31 and the support rod 43 will also affect the air flow path, hinder the flow of air and generate turbulence, thereby affecting the performance and efficiency of the fan 100. And worsening noise.
  • the support rod 43 is provided with a slot 431 to accommodate excess glue, which can effectively avoid obstructing the flow of air and reduce the generation of turbulence, ensuring the performance of the fan 100, improving the efficiency of the fan 100 and reducing operating noise.
  • a slot 431 can be provided on each support rod 43, that is, each support rod 43 can be better bonded and fixed with the stator yoke 31 with glue to ensure the stator
  • the strength of the connection between 30 and the support frame 40 can also prevent the glue at each support rod 43 from overflowing or seeping out of the end of the stator 30, and avoid affecting other parts, thereby avoiding affecting the reliability of the rotating electric machine 10 and deteriorating the rotating electric machine 10.
  • the airflow noise may be provided on one support rod 43 or several support rods 43.
  • the length L2 of the slot 431 on the support rod 43 refers to the length of the slot 431 along the axial direction of the rotating shaft 21.
  • the axial length L1 of the stator yoke 31 specifies the length of the sub-yoke 31 along the axial direction of the shaft 21.
  • the length L2 of the slot 431 on the support rod 43 is smaller than the axial length L1 of the stator yoke 31, that is, L2 ⁇ L1, which can be better This prevents the glue from overflowing from the end of the stator 30, so as to be prepared to ensure the performance and reliability of the rotating electric machine 10 and avoid noise deterioration.
  • the support frame 40 can be integrally formed by injection molding or die-casting molding process to ensure the good strength of the support frame 40, and can effectively ensure the first bearing seat 41 and the second bearing seat 42 Coaxiality simplifies the number of assembly and reduces the cumulative tolerance of assembly.
  • the coaxiality between the support frame 40 and the rotor 20 can be improved to ensure that the rotor 20 rotates flexibly and smoothly in the support frame 40, and the assembly accuracy of the stator 30 can be improved, which is beneficial to ensure the electromagnetic gas between the stator 30 and the rotor 20. Gap.
  • a soft washer 50 is installed in the first bearing seat 41, and the first bearing 23 is supported in the soft washer 50.
  • a soft washer 50 is provided in the first bearing seat 41, and the soft washer 50 supports the first bearing 23 and can absorb the load of the rotating electric machine 10, such as the radial force in any direction generated by the impeller 61, grinding wheel, blade, etc. To improve the force of the first bearing 23, to increase the service life of the first bearing 23, and to reduce vibration, to ensure the smooth and good rotation of the rotating shaft 21.
  • the first bearing 23 is supported by the soft washer 50, so that the soft washer 50 and the first bearing 23 can have a certain binding force, so that the rotating electric machine 10 can bear a certain axial force, and effectively absorb the load along the axis of rotation. 21 axial force.
  • the soft washer 50 when the rotor 20 rotates at high speed, the relative position of the inner ring and the outer ring of the first bearing 23 can also be adjusted, and it can have a certain self-adaptive centering effect to ensure the operation of the rotating electric machine 10 The stability and reliability of the system.
  • the soft washer 50 can be made into a ring shape, and the soft washer 50 can be arranged between the first bearing 23 and the first bearing seat 41, so as to better make the soft washer 50 and the first bearing 23.
  • the pressure diffusion combination makes the soft washer 50 and the first bearing 23 have a certain binding force, and provides elastic force along the radial direction, so as to better improve the axial and radial force of the first bearing 23, and improve
  • the service life of the first bearing 23 ensures the smoothness and reliability of the operation of the rotating electric machine 10.
  • a plurality of accommodating grooves 411 are provided on the radial inner surface of the first bearing housing 41, and two adjacent accommodating grooves 411 are arranged at intervals, and the soft washer 50 It includes a plurality of soft curved petals 51, and the plurality of soft curved petals 51 are respectively placed in a plurality of accommodating grooves 411, that is, each accommodating groove 411 is equipped with a soft curved petal 51, and each soft curved petal 51
  • the inner diameter d5 of the petals 51 is smaller than the inner diameter d1 of the first bearing seat 41, so that the soft arc-shaped petals 51 elastically abut the first bearing 23, and there is a certain amount between each soft arc-shaped petal 51 and the first bearing 23
  • the binding force is used to improve the axial and radial forces of the first bearing 23, increase the service life of the first bearing 23, and ensure the smoothness and reliability of the operation of the rotating electric machine 10. And this structure can also make the area between the two adjacent accommodating grooves 411 in
  • a plurality of accommodating grooves 411 are evenly provided in the first bearing seat 41 so that the circumferential force of the first bearing 23 can be uniform.
  • each accommodating groove 411 penetrates the first bearing seat 41 in the axial direction to facilitate the installation and fixation of the soft arc-shaped petal 51, and also facilitate the installation of the first bearing seat 41
  • the processing and manufacturing ensure the accuracy of processing, and the soft arc-shaped lobes 51 can better partially wrap the first bearing 23, so that the soft arc-shaped lobes 51 and the first bearing 23 can be better combined.
  • each accommodating groove 411 may also be located at the middle position of the radial inner surface of the first bearing seat 41 to better position the soft arc-shaped petals 51.
  • each side of each soft arc-shaped petal 51 is provided with ribs 52, and each rib 52 extends outwardly along the radial direction of the soft arc-shaped petal 51.
  • the ribs 52 on both sides of the soft arc-shaped petal 51 can be attached to both ends of the first bearing seat 41 in the axial direction to prevent the soft arc-shaped petal 51 Sliding or falling off along the axial direction of the first bearing seat 41.
  • a rib 52 may be provided only on one side of each soft arc-shaped petal 51 to locate one side of the soft arc-shaped petal 51. Please refer to FIG. 10 together.
  • the force of the load on the rotating electric machine 10 will move from the first bearing housing 41 to the direction of the permanent magnet 22, and the soft arc-shaped lobes 51 may be far away from the second bearing.
  • a rib 52 is provided on one side of the seat 42 to prevent the soft arc-shaped petal 51 from sliding or falling off along the axial direction of the first bearing seat 41.
  • the force of the load on the rotating electric machine 10 will be away from the permanent magnet 22 from the first bearing housing 41, and a rib can be provided only on the side of the soft arc-shaped petal 51 close to the second bearing housing 42. 52, to prevent the soft arc-shaped petal 51 from sliding or falling off along the axial direction of the first bearing seat 41.
  • a plurality of ribs 52 on one side of the soft arc-shaped petals 51 are connected in a ring shape, so as to connect the soft arc-shaped petals 51 and facilitate the installation of the soft arc-shaped petals 51.
  • each soft arc-shaped petal 51 when each soft arc-shaped petal 51 is provided with ribs 52 on both sides, the multiple ribs 52 on one side of the soft arc-shaped petal 51 can be connected to form a ring shape.
  • the rib 52a on one side of the soft washer 50 is a ring-shaped whole
  • the rib 52b on the other side of the soft washer 50 is a spaced multi-petal structure, which can connect and support the soft arc-shaped petals 51, and It is convenient for each soft arc-shaped petal 51 to be placed in the accommodating groove 411 in the first bearing seat 41.
  • FIG. 12 when each soft arc-shaped petal 51 is provided with ribs 52 on both sides, the multiple ribs 52 on one side of the soft arc-shaped petal 51 can be connected to form a ring shape.
  • the rib 52a on one side of the soft washer 50 is a ring-shaped whole
  • the rib 52b on the other side of the soft washer 50 is a spaced
  • each soft arc-shaped petal 51 when each soft arc-shaped petal 51 is provided with ribs 52 on both sides, multiple ribs 52 on both sides of the soft arc-shaped petal 51 may also be connected to form The ring shape, that is, the multiple ribs 52 on each side of the soft arc-shaped petal 51 are respectively connected in a ring shape to better connect and support the soft arc-shaped petals 51.
  • a plurality of ribs 52 on the side of the soft arc-shaped petal 51 may be connected in a ring shape.
  • the soft washer 50 may be made of a material with lower hardness, such as rubber material or thermoplastic elastomer material, so as to ensure good elasticity of the soft washer 50.
  • the rotating shaft 21 has an output end 211, and the output end 211 is used to connect the load.
  • the first bearing 23 and the first bearing seat 41 are located at the output end 211 of the rotating shaft 21, namely the first A bearing 23 and a first bearing seat 41 are located at one end of the rotating shaft 21 close to the load.
  • the first bearing 23 and the first bearing seat 41 are located at one end of the rotating shaft 21 close to the impeller 61.
  • the soft washer 50 in the first bearing seat 41 can more effectively absorb the axial and radial forces along the rotating shaft 21 to ensure the smoothness and reliability of the operation of the rotating electric machine 10.
  • the rotating shaft 21, the permanent magnet 22, the first bearing 23, and the second bearing 24 can be assembled into the rotor 20 as a whole, and then the rotor 20 is dynamically balanced and calibrated to ensure the overall flexibility of the rotor 20 , So that the overall assembly tolerance of the rotor 20 is smaller. Then, the rotor 20 as a whole is extended from one end of the support frame 40 and installed in the support frame 40, and the assembly structure formed by the rotor 20 and the support frame 40 can be adjusted to ensure the smooth rotation of the rotating shaft 21 and reduce the cumulative assembly tolerance.
  • the rotating electric machine 10 can be divided into three parts: the rotor 20, the stator 30 and the support frame 40, and the three parts can be assembled to reduce the direct and integral assembly process of parts, reduce the assembly tolerance, and effectively improve the rotor 20 and the support frame 40.
  • the rotating electric machine 10 of the embodiment of the present application can realize balanced high-speed operation and ensure a good service life.
  • the rotating electric machine 10 of the embodiment of the present application can be applied to household appliances, such as a fan 100, and can also be applied to equipment such as electric grinding wheels.
  • the fan 100 of the embodiment of the present application can keep the impeller 61 rotating at a high speed, and can be used in devices such as hair dryers, vacuum cleaners, and compressors.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

一种旋转电机(10)及具有其的风机(100)，所述旋转电机(10)，通过设置第一轴承座(41)、第二轴承座(42)和多条支撑杆(43)构成支撑框架(40)，以保证第一轴承座(41)与第二轴承座(42)的同轴度，进而保证第一轴承(23)与第二轴承(24)的同轴度，降低装配累积公差；将永磁体(22)的外径设置大于或等于第二轴承(24)的外径，并将第一轴承(23)的外径大于或等于永磁体(22)的外径，可以将转子(20)整体安装在支撑框架(40)上，方便装配，并且可以更好地调节与校准转子(20)的动平衡性，以保证旋转电机(10)的工作性能和可靠性。

Description

旋转电机及风机
本申请要求于2020年05月15日在中国专利局提交的、申请号为202010411896.8、发明名称为“旋转电机及风机”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
本申请涉及电机技术领域，具体涉及一种旋转电机及风机。
 背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然构成现有技术。随着对旋转电机的转速需求越来越高，如运转转速要求在上万转到十几万转，甚至几十万转每分钟，相应对旋转电机的制造精度要求也越来越高，如旋转电机的转子和定子的同轴度、轴承与转轴的同轴度、转轴两端轴承对应的两个轴承座之间的同轴度，以及定子、转子和轴承座等零部件的同轴度必须保证较高的精度，才能满足旋转电机高转速的要求。同时，为提高旋转电机效率，减小了定子与转子之间的气隙，这进一步提升了各部件间的装配精度要求。
而当前大多数旋转电机中，旋转电机的零组件较多，如定子、定子支撑结构、转子中各零件、转子的支撑结构一般都是多个零件，而任意相邻两个零件装配时存在一定的允许公差，而多个零件装配累计的公差会较高，造成旋转电机工作性能和可靠性也将随之降低。
 技术问题
本申请实施例的目的之一在于：提供一种旋转电机，旨在解决相关技术中存在的旋转电机中多个零件装配累计的公差较高，而造成旋转电机工作性能和可靠性降低的问题。
 技术解决方案
为解决上述技术问题，本申请实施例采用的技术方案是：
第一方面，提供了一种旋转电机，包括定子、转子和支撑框架；所述转子包括转轴、安装于所述转轴上的永磁体和分别安装于所述转轴之相对两端的第一轴承与第二轴承，所述第一轴承与所述第二轴承分别位于所述永磁体的相对两端；所述定子包括套装于所述支撑框架上的定子轭、设于所述定子轭上的多个定子齿和分别绕制于各所述定子齿上的线圈；所述支撑框架包括第一轴承座、第二轴承座和多条支撑所述定子轭的支撑杆，各所述支撑杆的相对两端分别与所述第一轴承座和所述第二轴承座相连，相邻两条所述支撑杆之间具有供所述定子齿置入的间隔空间，所述第一轴承安装于所述第一轴承座中，所述第二轴承安装于所述第二轴承座中，所述永磁体的外径大于或等于所述第二轴承的外径，所述第一轴承的外径大于或等于所述永磁体的外径。
第二方面，提供了一种风机，包括如上任一实施例所述的旋转电机和叶轮，所述叶轮安装于所述转轴上。
 有益效果
本申请实施例提供的旋转电机的有益效果在于：通过设置第一轴承座、第二轴承座和连接第一轴承座与第二轴承座的多条支撑杆构成支撑框架，可以良好保证第一轴承座与第二轴承座的同轴度，进而在将转子与支撑框架装配时，可以保证第一轴承与第二轴承良好的同轴度，降低装配累积公差；将永磁体的外径设置大于或等于第二轴承的外径，并将第一轴承的外径大于或等于永磁体的外径，则可以从第一轴承座的一端将转子整体直接安装在支撑框架上，方便装配；并且还可以将转子装配为个整体，再安装在支撑框架中，可以更好的调节与校准转子的动平衡性，保证可以转子平稳高速转动，减小振动，降低噪音，以保证旋转电机的工作性能和可靠性。
本申请实施例提供的风机的有益效果在于：该风机使用了上述任一实施例的旋转电机，可以保证旋转电机的性能与可靠性，进而保证该风机平稳、良好运行。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或示范性技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本申请实施例一提供的风机的结构示意图；
图2为图1所示的风机的爆炸结构示意图；
图3为本申请实施例一提供的旋转电机的垂直于其轴向的剖视结构示意图；
图4为本申请实施例提供的定子的剖视结构示意图；
图5为本申请实施例一提供的旋转电机的沿其轴向的剖视结构示意图；
图6为本申请实施例一提供的转子的剖视结构示意图；
图7为本申请实施例提供的支撑框架的结构示意图；
图8为本申请实施例二提供的风机的爆炸结构示意图；
图9为本申请实施例二提供的旋转电机的沿其轴向的剖视结构示意图；
图10为本申请实施例提供的支撑框架与软质垫圈的分解时的结构示意图；
图11为图10中支撑框架与软质垫圈组装时第一轴承座处的剖视结构示意图；
图12为本申请实施例提供的第一种软质垫圈的结构示意图；
图13为本申请实施例提供的第二种软质垫圈的结构示意图。
其中，图中各附图主要标记：
100-风机；
10-旋转电机；
20-转子；21-转轴；211-输出端；212-感应端；22-永磁体；23-第一轴承；24-第二轴承；25-平衡环；26-感应磁环；
30-定子；31-定子轭；311-定位凸；312-定位槽；32-定子齿；33-线圈；
40-支撑框架；41-第一轴承座；411-容置槽；42-第二轴承座；43-支撑杆；431-开槽；44-间隔空间；
50-软质垫圈；51-软质弧形瓣；52-挡边；
61-叶轮。
 本发明的实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本申请。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者间接在该另一个元件上。当一个元件被称为是“连接于”另一个元件，它可以是直接连接到另一个元件或间接连接至该另一个元件上。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。“若干”的含义是一个或一个以上，除非另有明确具体的限定。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。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申请中的具体含义。
在本申请说明书中描述的参考“一个实施例”、“一些实施例”或“实施例”意味着在本申请的一个或多个实施例中包括结合该实施例描述的特定特征、结构或特点。由此，在本说明书中的不同之处出现的语句“在一个实施例中”、“在一些实施例中”、“在其他一些实施例中”、“在另外一些实施例中”等不是必然都参考相同的实施例，而是意味着“一个或多个但不是所有的实施例”，除非是以其他方式另外特别强调。此外，在一个或多个实施例中，可以以任何合适的方式组合特定的特征、结构或特性。
请参阅图1及图2，现对本申请提供的风机100及旋转电机10进行说明。所述风机100包括旋转电机10和叶轮61。
请参阅图2，旋转电机10包括定子30、转子20和支撑框架40。
请参阅图3和图5，定子30包括定子轭31、多个定子齿32和分别绕制于各定子齿32上的线圈33；各定子齿32设于定子轭31上，定子轭31安装于支撑框架40上，定子轭31围绕支撑框架40设置，以通过支撑框架40来支撑住定子轭31，便于对定子30进行支撑固定，并对各定子齿32进行定位，保证各定子齿32的同轴度，以更好的保证旋转电机10性能。
请参阅图2，支撑框架40包括第一轴承座41、第二轴承座42和多条支撑杆43，各支撑杆43的相对两端分别与第一轴承座41和第二轴承座42相连，即支撑框架40包括若干支撑杆43、第一轴承座41和第二轴承座42，第一轴承座41连接各支撑杆43的一端，第二轴承座42连接各支撑杆43的另一端，相邻两个支撑杆43间隔设置。支撑杆43用于支撑定子轭31，相邻两个支撑杆43间隔设置，以使相邻两个支撑杆43之间形成间隔空间44，而定子齿32可以相邻两个支撑杆43之间形成的间隔空间44中。而多个支撑杆43连接第一轴承座41和第二轴承座42，可以保证第一轴承座41与第二轴承座42良好的同轴度。
请参阅图2和图6，转子20包括转轴21、永磁体22、第一轴承23和第二轴承24，永磁体22安装于转轴21上，以便定子30驱动转轴21转动。第一轴承23与第二轴承24分别安装于转轴21的相对两端，且第一轴承23与第二轴承24分别位于永磁体22的相对两端；以稳定支撑转轴21，并保证转轴21灵活转动。
请参阅图5和图6，第一轴承23的外径D1设置与第一轴承座41的内径d1相等，当然允许一定的间隙配合公差，可以使第一轴承23良好地间隙配合安装在第一轴承座41中。第一轴承23间隙配合安装于第一轴承座41中，以方便第一轴承23与第一轴承座41的配合，便于将第一轴承23安装在第一轴承座41中，也便于保证第一轴承23与第一轴承座41的同轴度，同时也方便校准转子20的动平衡。第二轴承24的外径D2设置与第二轴承座42的内径d2相等，当然允许一定的间隙配合公差，可以使第二轴承24良好地间隙配合安装在第二轴承座42中。第二轴承24间隙配合安装于第二轴承座42中，以方便第二轴承24与第二轴承座42的配合，便于将第二轴承24安装在第二轴承座42中，也便于保证第二轴承24与第二轴承座42的同轴度，同时也方便校准转子20的动平衡。
在一个实施例中，请参阅图2、图5和图6，永磁体22的外径D3大于或等于第二轴承24的外径D2，永磁体22的外径D3小于或等于第一轴承23的外径D1，以更好的从第一轴承座41的一端插入安装转子20，方便组装，并且在组装转子20前，可以将转子20先单独装配为一个整体，再安装在支撑框架40上，可以更好的调节转子20的动平衡性。并且该结构可以将支撑框架40靠近第一轴承座41的一端制作较大，保证支撑框架40的强度，并且可以减小电机的尺寸。
本实施例中，叶轮61安装在转轴21上，以使该旋转电机10形成风机100结构。在其他一些实施例中，该旋转电机10也可以用在其他需要使用旋转电机10的装置中，即转轴21上也可以连接其他负载，如连接砂轮，以形成电动砂轮；还可以将该旋转电机10应用在剃须刀中等。
本申请实施例提供的旋转电机10，通过设置第一轴承座41、第二轴承座42和连接第一轴承座41与第二轴承座42的多条支撑杆43构成支撑框架40，可以良好保证第一轴承座41与第二轴承座42的同轴度，进而在将转子20与支撑框架40装配时，可以保证第一轴承23与第二轴承24良好的同轴度，降低装配累积公差；将永磁体22的外径D3设置大于或等于第二轴承24的外径D2，并将第一轴承23的外径D1大于或等于永磁体22的外径D3，则可以从第一轴承座41的一端将转子20整体直接安装在支撑框架40上，方便装配；并且还可以将转子20装配为个整体，再安装在支撑框架40中，可以更好的调节与校准转子20的动平衡性，保证可以转子20平稳高速转动，减小振动，降低噪音，以保证旋转电机10的工作性能和可靠性。
本申请实施例提供的风机100，使用了上述旋转电机10，可以保证旋转电机10的性能与可靠性，进而保证该风机100平稳、良好运行。
在一个实施例中，请参阅图3、图4和图6，定子齿32的内圆孔指定子30中多个定子齿32围成的内圆孔；定子齿32的内圆孔的内径d4大于第二轴承座42的外径d3，从而在安装定子30时，可以将定子30从第二轴承座42的一端套在支撑框架40上，方便支撑框架40与定子30的定位固定，并且在制作定子30时，即可以对定子30各定子齿32进行定位，以保证多个定子齿32的同轴度，进而便于驱动转子20转动。另外，该旋转电机10在组装时，可以先将转子20与支撑框架40组件，这样可以对转子20及支撑框架40形成的整体结构进行动平衡校准，并保证转轴21、第一轴承23、第二轴承24、第一轴承座41和第二轴承座42良好的同轴度，降低装配累积公差。之后安装定子30，可以通过支撑杆43来对定子轭31进行定位，进而对各定子齿32进行定位，良好保证定子30的装配精度，保证定子30与转子20间的电磁气隙。
在一个实施例中，第一轴承23粘接固定在第一轴承座41中，以保证第一轴承23之外圈与第一轴承座41固定。
在一个实施例中，第一轴承23可以粘接或过盈配合固定在转轴21上，以保证第一轴承23与转轴21的良好连接。
在一个实施例中，第二轴承24粘接固定在第二轴承座42中，以保证第二轴承24之外圈与第二轴承座42固定。
在一个实施例中，第二轴承24可以粘接或过盈配合固定在转轴21上，以保证第二轴承24与转轴21的良好连接。
在一个实施例中，请参阅图2和图6，转轴21上还安装有平衡环25，以便进行动平衡校准，以更好的调节转子20的平衡性，保证转子20平衡高速转动。
在一个实施例中，平衡环25的外径小于或等于第一轴承23的外径D1，以便从第一轴承座41的一端插入安装转子20。
在一个实施例中，请参阅图2和图6，永磁体22的两端分别安装有平衡环25，以更好的校准动平衡，以便转轴21平稳高速转动。
在一个实施例中，靠近第一轴承23之平衡环25a的外径D4大于或等于永磁体22的外径D3，而远离第一轴承23之平衡环25b的外径D5小于或等于永磁体22的外径D3，以便从第一轴承座41的一端插入安装转子20。当然，在一些实施例中，可以将两个平衡环25的外径设置相等，即D4=D5。
在一个实施例中，请参阅图2和图6，转轴21上安装有感应磁环26，以便感应转轴21转动的速度与角度。在一个实施例中，请参阅图2和图6，转轴21具有感应端212和输出端211，输出端211用于连接负载，输出端211和感应端212分别为转轴21的两端，则感应磁环26设于转轴21的感应端212，该结构可以方便对感应磁环26的位置进行布局。
在一个实施例中，请参阅图5和图6，感应磁环26的外径D6小于或等于第二轴承24的外径D2，以便从第一轴承座41的一端插入安装转子20。当然，一些实施例中，感应磁环26也可以最后装配，即感应磁环26的外径D6可以设置大于第二轴承24的外径D2。
在一个实施例中，请参阅图3和图4，定子轭31的内侧面上设有至少一个定位凸311。定位凸311用于与支撑杆43配合定位，以便在安装定子30时，可以对定子轭31进行定位，保证定子30的装配精度，并且可以避免定子轭31发生周向移动。
在一个实施例中，请参阅图3和图4，定子轭31的内侧面上对应于各支撑杆43的位置分别设有定位凸311，可以对定子轭31上多个位置进行定位，以更好的对定子30进行定位，以保证定子30的装配精度。当然，在一些实施例中，也可以在定子轭31上仅设置一个定位凸311，在组装定子30时，先将该定位凸311与一个支撑杆43定位，再安装定子30。还有一些实施例中，也可以在定子轭31上设置多个定位凸311。
在一个实施例中，请参阅图3和图4，定子轭31对应于各支撑杆43的两侧分别设有定位凸311，相邻两个定位凸311之间形成定位槽312，在安装定子30时，可以将支撑杆43配合插入对应的定位槽312中，以更好的对定子轭31进行定位。定子轭31上于各支撑杆43的两侧分别设置定位凸311，可以更好的将定子轭31定位固定在支撑框架40上，以更好的将支撑杆43与定子轭31进行定位，提高装配精度。在一些实施例中，也可以仅在定子轭31上设置一对定位凸311，该对定位凸311间形成定位槽312，则在安装定子30时，可以先将一个支撑杆43的端部插入该定位槽312中，以定位定子30。还有一些实施例中，也可以在定子轭31上设置多对定位凸311。
在一个实施例中，支撑杆43可以采用过盈配合或间隙配合置入定位槽312中，以良好的定位定子30，避免发生径向和周向移动。在一个实施例中，还可以设置胶水，以将支撑杆43的侧面粘接固定在定位槽312中，以更好的固定住定子30。
在一个实施例中，请参阅图3和图4，定子轭31呈环状或框状结构，以保证定子轭31中磁路畅通。在一个实施例中，可以将定子轭31过盈配合套在支撑框架40上，实现定子30与支撑框架40的固定连接。
在一个实施例中，定子齿32与定子轭31是一体成型，以方便加工制作，保证制作的定子轭31的强度，并保证定子轭31与定子齿32间的磁路畅通。
在一个实施例中，请参阅图3和图5，定子轭31粘接固定于支撑杆43上，以便将定子30固定在支撑框架40上。
在一个实施例中，请参阅图5、图6和图7，支撑框架40的支撑杆43上开设有开槽431，开槽431位于该支撑杆43上靠近定子轭31的一面上，即开槽431位于支撑杆43沿转轴21径向的外侧面上，开槽431沿该支撑杆43的长度方向延伸设置。在支撑杆43上设置开槽431，当将定子轭31粘接在支撑杆43上时，可以在开槽431中充入胶水，以保证定子轭31与支撑杆43的良好粘接固定。当然，开槽431还可以收容多余的胶水，防止胶水溢出或渗出定子30的端部，避免影响其他零件，进而避免影响旋转电机10的可靠性和恶化旋转电机10的气流噪音。另外，当该旋转电机10应用在风机100中时，定子轭31与支撑杆43间溢出的胶水还会影响空气的流道，而阻碍空气的流动和产生湍流，从而影响风机100的性能、效率和恶化噪音。而在支撑杆43上设置开槽431来收容多余胶水，可以有效避免阻碍空气的流动和降低湍流的产生，保证风机100的性能，提升风机100的效率和降低运转的噪音。
在一个实施例中，请参阅图3和图7，可以在每个支撑杆43上均设置开槽431，即可以更好的使用胶水将各支撑杆43与定子轭31粘接固定，保证定子30与支撑框架40的连接强度，还可以良好的防止各支撑杆43处的胶水溢出或渗出定子30的端部，避免影响其他零件，进而避免影响旋转电机10的可靠性和恶化旋转电机10的气流噪音。在一些实施例中，可以在一个支撑杆43或几个支撑杆43上设置开槽431。
在一个实施例中，请参阅图5，支撑杆43上开槽431的长度L2指该开槽431沿转轴21轴向的长度。定子轭31之轴向的长度L1指定子轭31沿转轴21轴向的长度，支撑杆43上开槽431的长度L2小于定子轭31之轴向的长度L1，即L2<L1，可以更好的避免胶水从定子30端部溢出，以有准备保证旋转电机10的性能与可靠性，避免噪音恶化。
在一个实施例中，请参阅图7，支撑框架40可以采用注塑成型或压铸成型工艺一体成型，以保证支撑框架40的良好强度，并且可以有效保证第一轴承座41与第二轴承座42的同轴度，简化装配次数，降低装配累积公差。并且还可以提升支撑框架40与转子20间的同轴度，保证转子20在支撑框架40中灵活、平稳转动，并且可以提升定子30的装配精度，有利于保证定子30与转子20间的电磁气隙。
在一个实施例中，请参阅图8、图9和图10，第一轴承座41中安装有软质垫圈50，第一轴承23支撑于软质垫圈50中。在第一轴承座41中设置软质垫圈50，而软质垫圈50支撑住第一轴承23，可以吸收旋转电机10负载，如叶轮61、砂轮、刀片等所产生的任意方向的径向力，以改善第一轴承23的受力，以提升第一轴承23的使用寿命，并且减小振动，保证转轴21平稳、良好的转动。并且通过软质垫圈50支撑第一轴承23，可使软质垫圈50与第一轴承23之间具有一定的结合力，使得旋转电机10可以承受一定的轴向力，有效吸收负载产生的沿转轴21轴向的作用力。并且通过软质垫圈50良好的弹性作用，转子20在高速转动时，还可以调节第一轴承23内圈与外圈的相对位置，并且可以具有一定的自适应调心作用，保证旋转电机10运行的平稳性及可靠性。
在一个实施例中，可以将软质垫圈50设为环状，将软质垫圈50设在第一轴承23与第一轴承座41之间，以更好的使软质垫圈50与第一轴承23扩压结合，使软质垫圈50与第一轴承23之间具有一定的结合力，并提供沿径向的弹力，以更好的改善第一轴承23的轴向及径向受力，提升第一轴承23的使用寿命，保证旋转电机10运行的平稳性及可靠性。
在一个实施例中，请参阅图10和图11，第一轴承座41之径向的内表面上设有多个容置槽411，相邻两个容置槽411间隔设置，软质垫圈50包括多个软质弧形瓣51，多个软质弧形瓣51分别置于多个容置槽411中，即各容置槽411中安装有软质弧形瓣51，各软质弧形瓣51之内径d5小于第一轴承座41之内径d1，以使软质弧形瓣51弹性抵持第一轴承23，并使各软质弧形瓣51与第一轴承23之间具有一定的结合力，以改善第一轴承23的轴向及径向受力，提升第一轴承23的使用寿命，保证旋转电机10运行的平稳性及可靠性。并且该结构还可以使第一轴承座41中于相邻两个容置槽411之间的区域与第一轴承23良好的连接，从而将第一轴承23更稳定地安装在第一轴承座41中。
在一个实施例中，多个容置槽411均匀设于第一轴承座41中，以便可以使第一轴承23周向受力均匀。
在一个实施例中，请参阅图10和图11，各容置槽411沿轴向贯穿第一轴承座41，以方便软质弧形瓣51的安装固定，同时也方便第一轴承座41的加工制作，保证加工的精度，并且可以使各软质弧形瓣51可以更好的部分包裹第一轴承23，使各软质弧形瓣51与第一轴承23更好的结合。在一些实施例中，也可以使各容置槽411位于第一轴承座41之径向的内表面的中部位置，以更好的定位各软质弧形瓣51。
在一个实施例中，请参阅图10和图12，各软质弧形瓣51的两侧分别设有挡边52，各挡边52沿该软质弧形瓣51的径向向外凸延伸设置，则在安装软质弧形瓣51时，可以使软质弧形瓣51两侧的挡边52分别贴于第一轴承座41轴向的两端面上，以防止软质弧形瓣51沿第一轴承座41的轴向滑移或脱落。当然，在一个实施例中，也可以仅在各软质弧形瓣51的一侧设置挡边52，以定位软质弧形瓣51的一侧。请一并参阅图10，例如，在一些应用中，负载对旋转电机10的作用力会由第一轴承座41朝向永磁体22的方向，则可以仅在软质弧形瓣51远离第二轴承座42的一侧设置挡边52，以防软质弧形瓣51沿第一轴承座41的轴向滑移或脱落。而在一些应用中，负载对旋转电机10的作用力会由第一轴承座41远离永磁体22的方向，则可以仅在软质弧形瓣51靠近第二轴承座42的一侧设置挡边52，以防软质弧形瓣51沿第一轴承座41的轴向滑移或脱落。
在一个实施例中，请参阅图12，软质弧形瓣51一侧的多个挡边52连接呈环状，以便连接各软质弧形瓣51，便于将各软质弧形瓣51安装在第一轴承座41中的各容置槽411中。
在一个实施例中，请参阅图12，当各软质弧形瓣51的两侧均设有挡边52时，可以将软质弧形瓣51一侧的多个挡边52连接呈环状，即软质垫圈50一侧的挡边52a呈一个环形的整体，软质垫圈50另一侧的挡边52b为间隔的多瓣结构，从而既可以连接支撑各软质弧形瓣51，又便于各软质弧形瓣51置于第一轴承座41中的容置槽411中。在一个实施例中，请参阅图11，当各软质弧形瓣51的两侧均设有挡边52时，也可以将软质弧形瓣51两侧的多个挡边52分别连接呈环状，即软质弧形瓣51各侧的多个挡边52分别连接呈环状，以更好的连接与支撑各软质弧形瓣51。还有一些实施例中，当各软质弧形瓣51仅一侧设有挡边52时，可以将软质弧形瓣51该侧的多个挡边52连接呈环状。
在一个实施例中，软质垫圈50可以采用橡胶材料或热塑性性弹性体材料等硬度较低的材料制作，以保证软质垫圈50良好的弹性。
在一个实施例中，请参阅图8和图9，转轴21具有输出端211，输出端211用于连接负载，则第一轴承23及第一轴承座41位于转轴21的输出端211，即第一轴承23及第一轴承座41位于转轴21靠近负载的一端。如本实施例中，第一轴承23及第一轴承座41位于转轴21靠近叶轮61的一端。在转轴21转动时，第一轴承座41中的软质垫圈50可以更为有效吸收沿转轴21轴向及径向的作用力，保证旋转电机10运行的平稳性及可靠性。
本申请实施例的旋转电机10，可以先将转轴21、永磁体22、第一轴承23与第二轴承24装配成转子20整体，再对转子20进行动平衡校准，保证转子20整体的灵活性，使转子20整体的装配累积公差较小。再将转子20整体从支撑框架40的一端伸入并安装在支撑框架40中，并可以对转子20与支撑框架40形成的组装结构进行调校，保证转轴21的平稳转动，降低装配累积公差。再将定子30从支撑框架40靠近第二轴承座42的一端套在支撑框架40上，使定子轭31的内侧面固定在支撑框架40上。从而可以将旋转电机10分成转子20、定子30和支撑框架40三部分，将该三部分进行装配，减少零件直接与整体装配工序，降低装配累积公差，可以有效提升了转子20、支撑框架40上的第一轴承座41与第二轴承座42及定子齿32之内圆孔之间的同轴度，并有效保证定子30与转子20间的电磁气隙，保证旋转电机10运行的可靠性与平稳性。
本申请实施例的旋转电机10，可以实现平衡高速运行，保证良好的使用寿命。本申请实施例的旋转电机10可以应用在家用电器，如风机100，还可以应用在如电动砂轮等设备中。本申请实施例的风机100可以保持叶轮61高速转动，可以应用在吹风机、吸尘器、压缩机等装置中。
以上仅为本申请的可选实施例而已，并不用于限制本申请。对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (20)

  1. 旋转电机，包括定子、转子和支撑框架；所述转子包括转轴、安装于所述转轴上的永磁体和分别安装于所述转轴之相对两端的第一轴承与第二轴承，所述第一轴承与所述第二轴承分别位于所述永磁体的相对两端；所述定子包括套装于所述支撑框架上的定子轭、设于所述定子轭上的多个定子齿和分别绕制于各所述定子齿上的线圈；其特征在于：所述支撑框架包括第一轴承座、第二轴承座和多条支撑所述定子轭的支撑杆，各所述支撑杆的相对两端分别与所述第一轴承座和所述第二轴承座相连，相邻两条所述支撑杆之间具有供所述定子齿置入的间隔空间，所述第一轴承安装于所述第一轴承座中，所述第二轴承安装于所述第二轴承座中，所述永磁体的外径大于或等于所述第二轴承的外径，所述第一轴承的外径大于或等于所述永磁体的外径。
  2. 如权利要求1所述的旋转电机，其特征在于：所述定子齿的内圆孔之内径大于所述第二轴承座之外径。
  3. 如权利要求1所述的旋转电机，其特征在于：所述转轴上还安装有用于进行动平衡校准的平衡环，所述平衡环的外径小于或等于所述第一轴承的外径。
  4. 如权利要求3所述的旋转电机，其特征在于：所述永磁体的两端分别安装有所述平衡环。
  5. 如权利要求4所述的旋转电机，其特征在于：靠近所述第一轴承的所述平衡环的外径大于或等于所述永磁体的外径，远离所述第一轴承的所述平衡环的外径小于或等于所述永磁体的外径。
  6. 如权利要求1-5任一项所述的旋转电机，其特征在于：所述转轴上安装有用于感应所述转轴转动的速度与角度的感应磁环。
  7. 如权利要求6所述的旋转电机，其特征在于：所述感应磁环的外径小于或等于所述第二轴承的外径。
  8. 如权利要求1-5任一项所述的旋转电机，其特征在于：所述定子轭的内侧面上设有至少一个用于与所述支撑杆配合定位的定位凸。
  9. 如权利要求8所述的旋转电机，其特征在于：所述定子轭对应于各所述支撑杆的两侧分别设有所述定位凸，相邻两个所述定位凸之间形成供所述支撑杆配合插入的定位槽。
  10. 如权利要求1-5任一项所述的旋转电机，其特征在于：所述定子轭粘接固定于所述支撑杆上。
  11. 如权利要求10所述的旋转电机，其特征在于：至少一条所述支撑杆上开设有开槽，所述开槽沿该支撑杆的长度方向延伸设置，且所述开槽位于该支撑杆上靠近所述定子轭的一面上。
  12. 如权利要求11所述的旋转电机，其特征在于：所述开槽沿所述转轴轴向的长度小于所述定子轭之轴向的长度。
  13. 如权利要求11所述的旋转电机，其特征在于：各所述支撑杆上均设置有所述开槽。
  14. 如权利要求1-5任一项所述的旋转电机，其特征在于：所述第一轴承座中安装有软质垫圈，所述第一轴承支撑于所述软质垫圈中。
  15. 如权利要求14所述的旋转电机，其特征在于：所述第一轴承座之径向的内表面上间隔开设有多个容置槽，所述软质垫圈包括分别配合置于各所述容置槽的软质弧形瓣，各所述软质弧形瓣之内径小于所述第一轴承座之内径。
  16. 如权利要求15所述的旋转电机，其特征在于：各所述容置槽沿轴向贯穿所述第一轴承座。
  17. 如权利要求16所述的旋转电机，其特征在于：各所述软质弧形瓣的至少一侧沿该软质弧形瓣的径向向外凸出有挡边。
  18. 如权利要求17所述的旋转电机，其特征在于：所述软质弧形瓣至少一侧的多个所述挡边连接呈环状。
  19. 如权利要求14所述的旋转电机，其特征在于：所述软质垫圈设为环状，所述软质垫圈设于所述第一轴承与所述第一轴承座之间。
  20. 风机，其特征在于：包括如权利要求1-19任一项所述的旋转电机和叶轮，所述叶轮安装于所述转轴上。
PCT/CN2020/135848 2020-05-15 2020-12-11 旋转电机及风机 Ceased WO2021227483A1 (zh)

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