CN113675984B

CN113675984B - Rotating electrical machine and fan

Info

Publication number: CN113675984B
Application number: CN202010411911.9A
Authority: CN
Inventors: 左亚军; 迟闯; 李虎
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2022-08-26
Anticipated expiration: 2040-05-15
Also published as: CN113675984A

Abstract

The application provides a rotating electrical machine and a fan. According to the rotating motor, the strip-shaped iron core is bent and installed on the supporting frame to form the frame-shaped stator yoke; the supporting frame is formed by the first bearing seat, the second bearing seat and the plurality of supporting rods for connecting the first bearing seat and the second bearing seat, so that the coaxiality of the first bearing seat and the second bearing seat can be well guaranteed, further, when the rotor and the supporting frame are assembled, the good coaxiality of the first bearing and the second bearing can be guaranteed, the accumulated assembly tolerance is reduced, the rotor and the supporting frame can be assembled at first, then, the stator is installed, the dynamic balance of the rotor can be conveniently adjusted, and the problems of vibration, noise and the like are reduced; the supporting frame-shaped stator yoke is positioned and supported by the supporting rod of the supporting frame, so that the assembly precision of the stator can be well ensured, and the electromagnetic air gap between the stator and the rotor is ensured, so that the working performance and the reliability of the rotating motor are ensured.

Description

Rotating electrical machine and fan

Technical Field

The application belongs to the technical field of motors, and more specifically relates to a rotating electrical machine and a fan.

Background

Along with the increasing demand on the rotating speed of the rotating motor, if the rotating speed is required to be from ten thousand to hundreds of thousands of revolutions, even from hundreds of thousands of revolutions per minute, the corresponding manufacturing precision requirement on the rotating motor is also increased, and if the coaxiality of a rotor and a stator of the rotating motor, the coaxiality of a bearing and a rotating shaft, the coaxiality between two bearing seats corresponding to the bearings at two ends of the rotating shaft, and the coaxiality of parts such as the stator, the rotor and the bearing seats must ensure higher precision, so that the requirement on the high rotating speed of the rotating motor can be met. Meanwhile, in order to improve the efficiency of the rotating motor, the air gap between the stator and the rotor is reduced, and the assembly precision requirement among all parts is further improved.

However, in most of the current rotating electrical machines, there are many components of the rotating electrical machine, for example, the stator supporting structure, each component in the rotor, and the supporting structure of the rotor are generally multiple components, and when any two adjacent components are assembled, there is a certain allowable tolerance, and the tolerance accumulated by assembling multiple components is high, so that the working performance and reliability of the rotating electrical machine will be reduced.

Disclosure of Invention

An object of the embodiment of the present application is to provide a rotating electrical machine, so as to solve the problem that the working performance and reliability of the rotating electrical machine are reduced due to a high tolerance accumulated by assembling a plurality of parts in the rotating electrical machine in the prior art.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions: there is provided a rotary electric machine including a stator, a rotor, and a support frame; the rotor comprises a rotating shaft, a permanent magnet arranged on the rotating shaft, and a first bearing and a second bearing which are respectively arranged at two opposite ends of the rotating shaft; the stator comprises a frame-shaped stator yoke which is formed by bending a strip-shaped iron core and is arranged on the supporting frame, a plurality of stator teeth which are arranged on the frame-shaped stator yoke and coils which are respectively wound on the stator teeth; the support frame comprises a first bearing seat, a second bearing seat and a plurality of support rods for supporting the frame-shaped stator yoke, two opposite ends of each support rod are respectively connected with the first bearing seat and the second bearing seat, a spacing space for the stator teeth to be placed is arranged between every two adjacent support rods, the first bearing is installed in the first bearing seat, and the second bearing is installed in the second bearing seat.

In one embodiment, an inner diameter of the first bearing seat or/and an inner diameter of the second bearing seat is larger than an inner diameter of the inner circular hole of the stator tooth.

In one embodiment, the frame-shaped stator yoke is adhesively fixed to the support rod.

In one embodiment, at least one of the support rods is provided with a slot, the slot extends along the length direction of the support rod, and the slot is located on one surface of the support rod close to the frame-shaped stator yoke.

In one embodiment, a length of the slot in an axial direction of the rotating shaft is smaller than a length of the frame-shaped stator yoke in the axial direction.

In one embodiment, the inner side surface of the frame-shaped stator yoke is provided with at least one positioning protrusion for positioning in cooperation with the support rod.

In one embodiment, the frame-shaped stator yoke is provided with the positioning protrusions corresponding to two sides of each supporting rod, and a positioning groove for the supporting rod to be inserted is formed between two adjacent positioning protrusions.

In one embodiment, a soft washer is mounted in the first bearing seat, and the first bearing is supported in the soft washer.

In one embodiment, a plurality of receiving grooves are spaced apart from each other on the inner surface of the first bearing seat in the radial direction, and the soft washer includes soft arc-shaped lobes respectively disposed in each of the receiving grooves, and an inner diameter of each of the soft arc-shaped lobes is smaller than an inner diameter of the first bearing seat.

In an embodiment, each accommodating groove axially penetrates through the first bearing seat, and at least one side of each soft arc-shaped flap protrudes outwards along the radial direction of the soft arc-shaped flap to form a flange.

In one embodiment, the plurality of ribs on at least one side of the soft arc-shaped flap are connected in a ring shape.

In one embodiment, the bar-shaped iron core includes a plurality of first iron core bars and a plurality of second iron core bars, which are alternately arranged in sequence, each first iron core bar is provided with the stator teeth, two adjacent first iron core bars are respectively connected with two opposite ends of one second iron core bar, two adjacent second iron core bars are respectively connected with two opposite ends of one first iron core bar, a groove is arranged between each first iron core bar and the adjacent second iron core bar, and each groove is located on one surface of the bar-shaped iron core close to the stator teeth.

It is another object of an embodiment of the present application to provide a fan, including the rotating electrical machine and an impeller as described in any of the above embodiments, where the impeller is mounted on an end of the rotating shaft adjacent to the first bearing.

One or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

according to the rotating motor provided by the embodiment of the application, the strip-shaped iron core is bent and installed on the supporting frame to form the frame-shaped stator yoke; the supporting frame is formed by the first bearing seat, the second bearing seat and the plurality of supporting rods for connecting the first bearing seat and the second bearing seat, so that the coaxiality of the first bearing seat and the second bearing seat can be well guaranteed, further, when the rotor and the supporting frame are assembled, the good coaxiality of the first bearing and the second bearing can be guaranteed, the accumulated assembly tolerance is reduced, the rotor and the supporting frame can be assembled at first, then, the stator is installed, the dynamic balance of the rotor can be conveniently adjusted, and the problems of vibration, noise and the like are reduced; the supporting rod of the supporting frame is used for positioning the supporting frame-shaped stator yoke, so that the assembly precision of the stator can be well ensured, the electromagnetic air gap between the stator and the rotor is ensured, and the working performance and the reliability of the rotating motor are ensured.

The fan that this application embodiment provided has used the rotating electrical machines of above-mentioned arbitrary embodiment, can guarantee rotating electrical machines's performance and reliability, and then guarantees that this fan is steady, good operation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a fan provided in an embodiment of the present application;

FIG. 2 is an exploded view of the blower of FIG. 1;

fig. 3 is a schematic cross-sectional structural view of a rotating electrical machine provided in an embodiment of the present application, the cross-sectional view being perpendicular to an axial direction of the rotating electrical machine;

FIG. 4 is a schematic cross-sectional view of a stator according to an embodiment of the present disclosure;

fig. 5 is a schematic cross-sectional structural view of a rotary electric machine provided in an embodiment of the present application along an axial direction thereof;

fig. 6 is a schematic structural diagram of an initial state of a stator according to an embodiment of the present application.

FIG. 7 is a schematic structural diagram of a support frame according to an embodiment of the present disclosure;

FIG. 8 is a schematic exploded view of a support frame and a soft gasket according to an embodiment of the present disclosure;

FIG. 9 is a cross-sectional view of the support frame of FIG. 8 assembled with a soft gasket at a location of a first bearing seat;

FIG. 10 is a schematic structural view of a first soft gasket according to an embodiment of the present disclosure;

fig. 11 is a schematic structural view of a second soft gasket according to an embodiment of the present application.

Wherein, in the drawings, the reference numerals are mainly as follows:

100-a fan;

10-a rotating electrical machine;

20-a rotor; 21-a rotating shaft; 211-an output terminal; 212-a sensing terminal; 22-a permanent magnet; 23-a first bearing; 24-a second bearing; 25-a gimbal ring; 26-an induction magnet ring;

30-a stator; 31-frame-shaped stator yoke; 31 a-a bar core; 311-a first core bar; 312-a second core bar; 313-positioning convex; 314-a positioning slot; 315-groove; 32-stator teeth; 33-a coil;

40-a support frame; 41-a first bearing seat; 411-a receiving groove; 42-a second bearing block; 43-a support bar; 431-slotting; 44-separation space;

50-soft gasket; 51-soft arc petals; 52-a rib;

61-impeller.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be a mechanical connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Reference throughout this specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to fig. 1 and 2, a fan 100 and a rotating electrical machine 10 provided in the present application will now be described. The fan 100 includes a rotating electric machine 10 and an impeller 61.

Referring to fig. 2, the rotary electric machine 10 includes a stator 30, a rotor 20, and a support frame 40.

Referring to fig. 2 and 5, the rotor 20 includes a rotating shaft 21, a permanent magnet 22, a first bearing 23 and a second bearing 24, and 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 two opposite ends of the rotating shaft 21, and the first bearing 23 and the second bearing 24 are respectively located at two opposite ends of the permanent magnet 22; to stably support the rotary shaft 21 and ensure the flexible rotation of the rotary shaft 21.

Referring to fig. 3 and 6, the stator 30 includes a frame-shaped stator yoke 31, a plurality of stator teeth 32, and coils 33 respectively wound on the stator teeth 32; the frame-shaped stator yoke 31 is attached to the support frame 40, and the frame-shaped stator yoke 31 is supported by the support frame 40, and the frame-shaped stator yoke 31 is formed by bending a bar-shaped iron core 31 a. The frame-shaped stator yoke 31 is formed by bending the strip-shaped iron core 31a, the initial state of the stator 30 is in a strip shape, coils 33 can be conveniently wound in each stator tooth 32, the full slot rate is improved, the performance of the rotating electric machine 10 is improved, and particularly the performance of the rotating electric machine 10 can be better ensured for small-sized rotating electric machines 10 of fans 100.

Referring to fig. 2 and 7, the supporting frame 40 includes a first bearing seat 41, a second bearing seat 42 and a plurality of supporting rods 43, wherein opposite ends of each supporting rod 43 are respectively connected to the first bearing seat 41 and the second bearing seat 42, that is, the supporting frame 40 includes a plurality of supporting rods 43, the first bearing seat 41 is connected to one end of each supporting rod 43, the second bearing seat 42 is connected to the other end of each supporting rod 43, and two adjacent supporting rods 43 are spaced apart from each other. The support rods 43 are used for supporting the frame-shaped stator yoke 31, and two adjacent support rods 43 are spaced apart from each other so that a space 44 is formed between the two adjacent support rods 43, and the stator teeth 32 can be inserted into the space 44 formed between the two adjacent support rods 43. And a plurality of support rods 43 connect the first bearing seat 41 and the second bearing seat 42, so that good coaxiality of the first bearing seat 41 and the second bearing seat 42 can be ensured.

Referring to fig. 2 and 5, the first bearing 23 is installed in the first bearing housing 41, and the second bearing 24 is installed in the second bearing housing 42, thereby installing the rotor 20 in the support frame 40.

Referring to fig. 3 and 6, when the stator 30 is mounted, the bar-shaped iron core 31a in an initial state may be bent and supported on the supporting rod 43, and the plurality of stator teeth 32 may be respectively disposed in the plurality of spacing spaces 44 to support the stator 30 by the supporting frame 40.

Referring to fig. 2, 3 and 6, since the stator 30 is in an elongated shape in an initial state, the stator 30 may be bent into a frame shape to be mounted on the support frame 40 when being mounted on the support frame 40. When the rotating electrical machine 10 is assembled, the rotor 20 and the supporting frame 40 may be assembled first, so that the dynamic balance calibration of the integral structure formed by the rotor 20 and the supporting frame 40 may be performed, good coaxiality of the rotating shaft 21, the first bearing 23, the second bearing 24, the first bearing seat 41, and the second bearing seat 42 may be ensured, and the assembly accumulated tolerance may be reduced. After the stator 30 is installed, the frame-shaped stator yoke 31 can be positioned through the support rod 43, and then each stator tooth 32 is positioned, so that the assembly precision of the stator 30 is well ensured, and the electromagnetic air gap between the stator 30 and the rotor 20 is ensured.

In this embodiment, the impeller 61 is mounted on the rotating shaft 21 so that the rotating electrical machine 10 forms a fan 100 structure. In other embodiments, the rotating electrical machine 10 may also be used in other devices that require the rotating electrical machine 10, that is, the rotating shaft 21 may also be connected with other loads, such as a grinding wheel, to form an electric grinding wheel; the rotary electric machine 10 can also be applied to a shaver or the like.

The rotating electrical machine 10 according to the embodiment of the present application is mounted on the support frame 40 by bending using the bar-shaped iron core 31a to form the frame-shaped stator yoke 31; the supporting frame 40 is formed by arranging the first bearing seat 41, the second bearing seat 42 and the plurality of supporting rods 43 for connecting the first bearing seat 41 and the second bearing seat 42, so that the coaxiality of the first bearing seat 41 and the second bearing seat 42 can be well ensured, further, when the rotor 20 is assembled with the supporting frame 40, the good coaxiality of the first bearing 23 and the second bearing 24 can be ensured, the accumulated assembly tolerance is reduced, the rotor 20 and the supporting frame 40 can be assembled at first, then the stator 30 is installed, the dynamic balance of the rotor 20 can be conveniently adjusted, and the problems of vibration, noise and the like are reduced; the support frame-shaped stator yoke 31 is positioned and supported by the support rods 43 of the support frame 40, so that the assembly accuracy of the stator 30 can be well ensured, and the electromagnetic air gap between the stator 30 and the rotor 20 can be ensured, thereby ensuring the working performance and reliability of the rotating electrical machine 10.

The fan 100 provided by the embodiment of the application uses the rotating motor 10, so that the performance and reliability of the rotating motor 10 can be ensured, and the fan 100 is ensured to run stably and well.

In one embodiment, referring to fig. 3, the frame-shaped stator yoke 31 of the stator 30 may have a polygonal shape. In some embodiments, the frame-shaped stator yoke 31 may also be ring-shaped.

In one embodiment, referring to fig. 2 and 5, a balance ring 25 is further installed on the rotating shaft 21 for performing dynamic balance calibration to better adjust the balance of the rotor 20 and ensure the rotor 20 rotates at a high speed in a balanced manner.

In one embodiment, referring to fig. 2 and 5, the two ends of the permanent magnet 22 are respectively provided with a balance ring 25 to better calibrate the dynamic balance, so that the rotating shaft 21 can smoothly rotate at a high speed.

In one embodiment, referring to fig. 2, an induction magnet ring 26 is installed on the rotating shaft 21 to induce the rotating speed and angle of the rotating shaft 21. In an embodiment, referring to fig. 2, the rotating shaft 21 has an induction end 212 and an output end 211, the output end 211 is used for connecting a load, the output end 211 and the induction end 212 are two ends of the rotating shaft 21, respectively, and the induction magnetic ring 26 is disposed at the induction end 212 of the rotating shaft 21, which can facilitate the layout of the position of the induction magnetic ring 26.

In one embodiment, referring to fig. 3 and 6, at least one positioning protrusion 313 is formed on an inner side surface of the frame-shaped stator yoke 31. The positioning projection 313 is used for positioning in cooperation with the support rod 43 so that the bar-shaped iron core 31a can be positioned on the support rod 43 when the bar-shaped iron core 31a is bent, so that the bar-shaped iron core 31a can be bent conveniently, the assembly accuracy of the stator 30 is ensured, and circumferential movement of the frame-shaped stator yoke 31 can be avoided.

In one embodiment, referring to fig. 3 and 6, the inner side surface of the frame-shaped stator yoke 31 is provided with positioning protrusions 313 corresponding to the positions of the support rods 43, respectively. The inner side surface of the frame-shaped stator yoke 31 is provided with positioning protrusions 313, and since the frame-shaped stator yoke 31 is in an initial state of a long iron core, the long iron core forming the frame-shaped stator yoke 31 is provided with the positioning protrusions 313 on a side close to the stator teeth 32, and when the bar-shaped iron core 31a is bent, each support rod 43 can be matched with the corresponding positioning protrusions 313 to position the bar-shaped iron core 31a, so that the assembly accuracy of the stator 30 is ensured. Of course, in some embodiments, only one positioning protrusion 313 may be provided on the frame-shaped stator yoke 31, and when bending the bar-shaped iron core 31a, the positioning protrusion 313 and one support rod 43 may be positioned first, and then the bar-shaped iron core 31a may be bent. In still other embodiments, a plurality of positioning projections 313 may be provided on the frame-shaped stator yoke 31.

In one embodiment, referring to fig. 3 and 6, the frame-shaped stator yoke 31 is provided with positioning protrusions 313 corresponding to both sides of each supporting rod 43, and a positioning groove 314 is formed between two adjacent positioning protrusions 313, and the supporting rods 43 are inserted into the corresponding positioning grooves 314 in a fitting manner when the bar-shaped iron core 31a is bent. The positioning protrusions 313 are respectively arranged on the two sides of each supporting rod 43 on the frame-shaped stator yoke 31, so that the frame-shaped stator yoke 31 can be better positioned and fixed on the supporting frame 40, and the supporting rods 43 and the bar-shaped iron cores 31a can be better positioned when the bar-shaped iron cores 31a are bent, and the assembly precision is improved. In some embodiments, only one pair of positioning protrusions 313 may be provided on the frame-shaped stator yoke 31, and the positioning groove 314 is formed between the pair of positioning protrusions 313, so that when the stator 30 is installed, the end of one of the support rods 43 may be inserted into the positioning groove 314, and then the strip core may be bent. In still other embodiments, a plurality of pairs of positioning projections 313 may be provided on the frame-shaped stator yoke 31.

In one embodiment, the support rods 43 may be inserted into the detents 314 with an interference or clearance fit to provide good positioning of the stator 30 against radial and circumferential movement. In one embodiment, glue may be further provided to adhesively fix the side surfaces of the supporting rods 43 in the positioning grooves 314 to better fix the stator 30.

In one embodiment, referring to fig. 3 and 6, two ends of the bar-shaped iron core 31a are welded or bonded to each other after the bar-shaped iron core 31a is bent to form the frame-shaped stator yoke 31, that is, after the bar-shaped iron core 31a is bent to be frame-shaped, two ends of the bar-shaped iron core 31a are welded or bonded to be an integral body, so as to ensure that the formed frame-shaped stator yoke 31 has a stable structure and ensure that a magnetic circuit in the frame-shaped stator yoke 31 is smooth. In some embodiments, the bar-shaped iron core 31a may be bent and fixed on the supporting frame 40 so that the two ends of the bar-shaped iron core 31a are connected in an abutting manner, and the magnetic circuit in the frame-shaped stator yoke 31 may be ensured to be smooth.

In an embodiment, referring to fig. 6, the strip-shaped iron core 31a includes a plurality of first iron core bars 311 and a plurality of second iron core bars 312 that are alternately arranged in sequence, each first iron core bar 311 is provided with a stator tooth 32, two adjacent first iron core bars 311 are respectively connected to two opposite ends of one second iron core bar 312, two adjacent second iron core bars 312 are respectively connected to two opposite ends of one first iron core bar 311, a groove 315 is provided between each first iron core bar 311 and the adjacent second iron core bar 312, each groove 315 is located on one surface of the strip-shaped iron core 31a close to the stator tooth 32, when the strip-shaped iron core 31a is bent, the first iron core bar 311 and the second iron core bar 312 are bent inward, and the strip-shaped iron core 31a can be bent at the groove 315 to facilitate bending of the strip-shaped iron core 31 a.

In one embodiment, each groove 315 may have a V-shape to better bend the bar core 31 a. In other embodiments, each groove 315 may be configured in other shapes, such as a U-shape.

In one embodiment, referring to fig. 6, when the bar-shaped core 31a is provided with the positioning protrusion 313, the positioning protrusion 313 is provided on the second core bar 312. In still other embodiments, the positioning protrusions 313 may be integrally formed with the bar-shaped iron core 31a to facilitate the manufacturing process and ensure the strength of the manufactured frame-shaped stator yoke 31.

In one embodiment, the stator teeth 32 and the bar core 31a are integrally formed to facilitate manufacturing, ensure strength of the frame-shaped stator yoke 31, and ensure smooth magnetic path between the frame-shaped stator yoke 31 and the stator teeth 32.

In one embodiment, referring to fig. 5, the first bearing 23 is installed in the first bearing seat 41 with a clearance fit, so as to facilitate the fitting of the first bearing 23 with the first bearing seat 41, facilitate the installation of the first bearing 23 in the first bearing seat 41, facilitate the ensuring of the coaxiality of the first bearing 23 with the first bearing seat 41, and facilitate the calibration of the dynamic balance of the rotor 20.

In one embodiment, the outer diameter of the first bearing 23 may be set equal to the inner diameter d1 of the first bearing seat 41, allowing for some clearance fit tolerance, of course, allowing for good clearance fit installation of the first bearing 23 in the first bearing seat 41.

In one embodiment, 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 with the first bearing seat 41.

In one embodiment, the first bearing 23 may be fixed on the rotating shaft 21 by bonding or interference fit to ensure a good connection between the first bearing 23 and the rotating shaft 21.

In one embodiment, referring to fig. 5, second bearing 24 is mounted in second bearing housing 42 in a clearance fit to facilitate the mating of second bearing 24 with second bearing housing 42, to facilitate the mounting of second bearing 24 in second bearing housing 42, to facilitate the ensuring of the coaxiality of second bearing 24 with second bearing housing 42, and to facilitate the dynamic balance calibration of rotor 20.

In one embodiment, the outer diameter of second bearing 24 may be set equal to inner diameter d2 of second bearing housing 42, although some clearance fit tolerance is allowed, which may allow second bearing 24 to fit well into second bearing housing 42 with a clearance fit.

In one embodiment, the second bearing 24 is adhesively secured in the second bearing housing 42 to secure the outer race of the second bearing 24 to the second bearing housing 42.

In one embodiment, the second bearing 24 may be fixed to the rotating shaft 21 by bonding or interference fit to ensure a good connection between the second bearing 24 and the rotating shaft 21.

In one embodiment, referring to fig. 2 and 5, the outer diameter of the first bearing 23 is equal to the outer diameter of the second bearing 24, so that the types and specifications of the bearings can be unified, the types of materials of the rotating electrical machine 10 can be reduced, the cost can be reduced, and the assembly of the bearings can be facilitated.

In one embodiment, referring to fig. 5, the inner diameter d1 of the first bearing seat 41 is equal to the inner diameter d2 of the second bearing seat 42, the outer diameter of the first bearing 23 is equal to the outer diameter of the second bearing 24, and the inner diameter d1 of the first bearing seat 41 is equal to the outer diameter of the first bearing 23, and during assembly, the first bearing 23 and the second bearing 24 may be fixed on the rotating shaft 21, i.e. the whole rotor 20 may be assembled first, and then the rotor 20 is subjected to dynamic balance calibration to reduce the accumulated assembly tolerance; the rotor 20 is then inserted from one end of the support frame 40 to integrally mount the rotor 20 in the support frame 40, thereby simplifying the assembly process and reducing the assembly tolerance stack-up.

In one embodiment, referring to fig. 4 and 5, the inner hole of the stator teeth 32 is an inner hole surrounded by a plurality of stator teeth 32 in the stator 30, and the inner diameter d4 of the inner hole of the stator teeth 32 is smaller than the inner diameter d1 of the first bearing seat 41, so as to prevent the stator 20 from being sleeved or disassembled from the end of the support frame 40 close to the first bearing seat 41, and during assembly, the rotor 20 and the support frame 40 can be assembled first, the stator 30 can be assembled, and the gap between the stator teeth 32 and the permanent magnet 22 on the rotor 20 can be reduced.

In one embodiment, the inner diameter d4 of the inner circular hole of the stator teeth 32 may be smaller than the inner diameter d2 of the second bearing seat 42, so as to avoid the assembly or disassembly of the stator 20 from the end of the supporting frame 40 close to the second bearing seat 42, and during the assembly, the rotor 20 and the supporting frame 40 may be assembled first, and then the stator 30 may be assembled, and the gap between the stator teeth 32 and the permanent magnets 22 on the rotor 20 may be reduced.

In one embodiment, the inner diameter d4 of the inner circular hole of the stator teeth 32 may be smaller than the inner diameter d1 of the first bearing seat 41, and the inner diameter d4 of the inner circular hole of the stator teeth 32 is smaller than the inner diameter d2 of the second bearing seat 42, preventing the stator 20 from being nested or removed from both ends of the support frame 40.

In one embodiment, referring to fig. 3 to 6, the frame-shaped stator yoke 31 is adhesively fixed to the support rod 43 to fix the stator 30 to the support frame 40. If glue is applied to the corresponding position on the long iron core or glue is applied to the outer surface of the support rod 43 in the radial direction, the formed frame-shaped stator yoke 31 is bonded to the support rod 43 after the long iron core is bent.

In one embodiment, referring to fig. 3, 7 and 8, a slot 431 is formed on the supporting rod 43 of the supporting frame 40, and the slot 431 is located on a surface of the supporting rod 43 close to the frame-shaped stator yoke 31, that is, the slot 431 is located on an outer side surface of the supporting rod 43 along the radial direction of the rotating shaft 21, and the slot 431 is extended along the length direction of the supporting rod 43. The supporting rod 43 is provided with a slot 431, and when the frame-shaped stator yoke 31 is bonded to the supporting rod 43, glue can be filled into the slot 431 to ensure good bonding fixation of the frame-shaped stator yoke 31 and the supporting rod 43. Of course, the slot 431 may also accommodate excess glue, preventing the glue from overflowing or seeping out of the end of the stator 30, avoiding affecting other parts, and thus avoiding affecting the reliability of the rotating electrical machine 10 and deteriorating the airflow noise of the rotating electrical machine 10. In addition, when the rotary electric machine 10 is applied to the fan 100, the glue overflowing between the frame-shaped stator yoke 31 and the support rod 43 may affect the flow path of the air to obstruct the flow of the air and generate turbulence, thereby affecting the performance, efficiency, and noise of the fan 100. The supporting rod 43 is provided with the slot 431 for accommodating the surplus glue, so that the air flow is effectively prevented from being blocked, the generation of turbulence is reduced, the performance of the fan 100 is ensured, the efficiency of the fan 100 is improved, and the running noise is reduced.

In an embodiment, referring to fig. 3 and 7, a slot 431 may be formed on each supporting rod 43, that is, the supporting rods 43 and the frame-shaped stator yoke 31 may be better bonded and fixed by using glue, so as to ensure the connection strength between the stator 30 and the supporting frame 40, and the glue at the supporting rods 43 may be well prevented from overflowing or seeping out of the end of the stator 30, so as to avoid affecting other parts, and further avoid affecting the reliability of the rotating electrical machine 10 and deteriorating the airflow noise of the rotating electrical machine 10. In some embodiments, the slots 431 may be provided on one support rod 43 or several support rods 43.

In one embodiment, referring to fig. 5, the length L2 of the slot 431 on the supporting rod 43 indicates the length of the slot 431 along the axial direction of the rotating shaft 21. The axial length L1 of the frame-shaped stator yoke 31 refers to the axial length of the frame-shaped stator yoke 31 along the rotating shaft 21, and the length L2 of the slot 431 on the supporting rod 43 is smaller than the axial length L1 of the frame-shaped stator yoke 31, i.e., L2< L1, which can better prevent the glue from overflowing from the end of the stator 30, so as to prepare for ensuring the performance and reliability of the rotating electrical machine 10 and avoiding the noise deterioration.

In one embodiment, referring to fig. 7, the supporting frame 40 may be integrally formed by injection molding or die-casting, so as to ensure good strength of the supporting frame 40, and to effectively ensure coaxiality of the first bearing seat 41 and the second bearing seat 42, simplify assembly times, and reduce assembly tolerance stack. And can also promote the axiality between support frame 40 and rotor 20, guarantee that rotor 20 is nimble, steady rotation in support frame 40 to can promote the assembly precision of stator 30, be favorable to guaranteeing the electromagnetic air gap between stator 30 and rotor 20.

In one embodiment, referring to fig. 5, 8 and 9, the first bearing seat 41 is installed with a soft washer 50 therein, and the first bearing 23 is supported in the soft washer 50. The soft washer 50 is disposed in the first bearing seat 41, and the soft washer 50 supports the first bearing 23, so as to absorb the load of the rotating electrical machine 10, such as the radial force in any direction generated by the impeller 61, the grinding wheel, the blade, etc., so as to improve the stress of the first bearing 23, to prolong the service life of the first bearing 23, and to reduce the vibration, thereby ensuring the stable and good rotation of the rotating shaft 21. And the soft gasket 50 supports the first bearing 23, so that a certain binding force can be formed between the soft gasket 50 and the first bearing 23, and the rotating electrical machine 10 can bear a certain axial force and effectively absorb the axial acting force generated by the load along the rotating shaft 21. And through the good elastic action of the soft gasket 50, when the rotor 20 rotates at a high speed, the relative position of the inner ring and the outer ring of the first bearing 23 can be adjusted, and a certain self-adaptive centering action can be achieved, so that the running stability and reliability of the rotating motor 10 are ensured.

In an embodiment, the soft washer 50 may be configured to be an annular shape, and the soft washer 50 is disposed between the first bearing 23 and the first bearing seat 41, so as to better combine the soft washer 50 and the first bearing 23 in a diffusion manner, so that a certain combining force is provided between the soft washer 50 and the first bearing 23, and a radial elastic force is provided, so as to better improve axial and radial stresses of the first bearing 23, improve the service life of the first bearing 23, and ensure the running stability and reliability of the rotating electrical machine 10.

In an embodiment, referring to fig. 8, 9 and 10, a plurality of receiving grooves 411 are disposed on a radial inner surface of the first bearing seat 41, two adjacent receiving grooves 411 are disposed at intervals, the soft gasket 50 includes a plurality of soft arc-shaped petals 51, the soft arc-shaped petals 51 are disposed in the receiving grooves 411 respectively, that is, the soft arc-shaped petals 51 are mounted in the receiving grooves 411, an inner diameter d3 of each soft arc-shaped petal 51 is smaller than an inner diameter d1 of the first bearing seat 41, so that the soft arc-shaped petals 51 elastically support the first bearing 23, and a certain binding force is provided between each soft arc-shaped petal 51 and the first bearing 23, so as to improve axial and radial forces of the first bearing 23, prolong a service life of the first bearing 23, and ensure smoothness and reliability of operation of the rotating electrical machine 10. And this structure also enables the area between two adjacent receiving grooves 411 in the first bearing housing 41 to be well connected with the first bearing 23, thereby more stably mounting the first bearing 23 in the first bearing housing 41.

In one embodiment, the receiving slots 411 are uniformly formed in the first bearing seat 41, so that the first bearing 23 is uniformly stressed in the circumferential direction.

In an embodiment, referring to fig. 8 and 9, each receiving groove 411 axially penetrates through the first bearing seat 41 to facilitate the installation and fixation of the soft arc-shaped petals 51, and also facilitate the processing and manufacturing of the first bearing seat 41, so as to ensure the processing precision, and further, each soft arc-shaped petal 51 can partially wrap the first bearing 23, so that each soft arc-shaped petal 51 and the first bearing 23 can be better combined. In some embodiments, each receiving groove 411 may also be located at a middle position of the radial inner surface of the first bearing seat 41, so as to better position each soft arc-shaped flap 51.

In an embodiment, referring to fig. 8 and fig. 10, two sides of each soft arc-shaped flap 51 are respectively provided with a retaining edge 52, and each retaining edge 52 extends outward along the radial direction of the soft arc-shaped flap 51, so that when the soft arc-shaped flap 51 is installed, the retaining edges 52 at two sides of the soft arc-shaped flap 51 can respectively cling to two axial end surfaces of the first bearing seat 41, so as to prevent the soft arc-shaped flap 51 from sliding or falling off along the axial direction of the first bearing seat 41. Of course, in one embodiment, the rib 52 may be disposed on only one side of each soft arcuate flap 51 to position one side of the soft arcuate flap 51. Referring to fig. 5, for example, in some applications, the force applied by the load to the rotating electrical machine 10 will be directed from the first bearing seat 41 to the permanent magnet 22, a rib 52 may be disposed only on one side of the soft arc-shaped flap 51 away from the second bearing seat 42 to prevent the soft arc-shaped flap 51 from slipping or falling off along the axial direction of the first bearing seat 41. In some applications, the force applied by the load to the rotating electrical machine 10 is in a direction away from the permanent magnet 22 by the first bearing seat 41, and the rib 52 may be disposed only on one side of the soft arc-shaped flap 51 close to the second bearing seat 42 to prevent the soft arc-shaped flap 51 from slipping or falling off along the axial direction of the first bearing seat 41.

In one embodiment, referring to fig. 10, the plurality of ribs 52 on one side of the soft arc-shaped petals 51 are connected to form a ring shape so as to connect the soft arc-shaped petals 51, so that the soft arc-shaped petals 51 are installed in the receiving slots 411 of the first bearing seat 41.

In an embodiment, referring to fig. 10, when the soft arc-shaped flaps 51 are provided with the retaining edges 52 on both sides, the retaining edges 52 on one side of the soft arc-shaped flaps 51 can be connected to form a ring, that is, the retaining edge 52a on one side of the soft washer 50 is an annular whole, and the retaining edge 52b on the other side of the soft washer 50 is a spaced multi-flap structure, so as to connect and support the soft arc-shaped flaps 51 and facilitate the soft arc-shaped flaps 51 to be placed in the receiving groove 411 in the first bearing seat 41. In an embodiment, referring to fig. 11, when both sides of each soft arc-shaped flap 51 are provided with the retaining edges 52, the retaining edges 52 on both sides of the soft arc-shaped flap 51 may be connected to form a ring shape, respectively, that is, the retaining edges 52 on each side of the soft arc-shaped flap 51 are connected to form a ring shape, respectively, so as to better connect and support each soft arc-shaped flap 51. In some embodiments, when only one side of each soft arc flap 51 is provided with the rib 52, the ribs 52 on the side of the soft arc flap 51 may be connected in a ring shape.

In one embodiment, the soft gasket 50 can be made of a material with a lower hardness, such as a rubber material or a thermoplastic elastomer material, to ensure good elasticity of the soft gasket 50.

In one embodiment, referring to fig. 2 and fig. 5, the rotating shaft 21 has an output end 211, the output end 211 is used for connecting to a load, and the first bearing 23 and the first bearing seat 41 are located at the output end 211 of the rotating shaft 21, that is, the first bearing 23 and the first bearing seat 41 are located at an end of the rotating shaft 21 close to the load. As in the present embodiment, 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. When the rotating shaft 21 rotates, the soft washer 50 in the first bearing seat 41 can more effectively absorb the axial and radial acting forces along the rotating shaft 21, so as to ensure the running stability and reliability of the rotating electrical machine 10.

The rotating electrical machine 10 of the embodiment of the application can assemble the rotating shaft 21, the permanent magnet 22, the first bearing 23 and the second bearing 24 into the whole rotor 20, and then perform dynamic balance calibration on the rotor 20, so that the whole flexibility of the rotor 20 is ensured, and the whole assembly accumulated tolerance of the rotor 20 is smaller. The whole rotor 20 is inserted into the supporting frame 40 from one end of the supporting frame 40 and is installed in the supporting frame 40, and the assembling structure formed by the rotor 20 and the supporting frame 40 can be adjusted, so that the stable rotation of the rotating shaft 21 is ensured, and the assembly accumulated tolerance is reduced. Then, the bar-shaped stator 30 is mounted on the support frame 40 by bending from the radial direction of the support frame 40, and then the stator 30 is formed into a closed frame-shaped integral structure by welding or gluing, so that the inner side surface of the frame-shaped stator yoke 31 is fixed on the support frame 40. Therefore, the rotating motor 10 can be divided into the rotor 20, the stator 30 and the support frame 40, the three parts are assembled, the direct and integral assembly processes of parts are reduced, the assembly accumulated tolerance is reduced, the coaxiality between the first bearing seat 41 and the second bearing seat 42 on the rotor 20 and the support frame 40 and the inner circular holes of the stator teeth 32 can be effectively improved, the electromagnetic air gap between the stator 30 and the rotor 20 is effectively ensured, and the reliability and the stability of the operation of the rotating motor 10 are ensured.

The rotating electrical machine 10 of the embodiment of the application can realize balanced high-speed operation, and ensures a good service life. The rotating electrical machine 10 of the embodiment of the present application can be applied to a household electrical appliance, such as the blower 100, and can also be applied to a device such as an electric grinding wheel. The fan 100 of the embodiment of the present application can maintain the impeller 61 to rotate at a high speed, and can be applied to a blower 100, a vacuum cleaner, a compressor, and the like.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rotating electrical machine including a stator, a rotor, and a support frame; the rotor comprises a rotating shaft, a permanent magnet arranged on the rotating shaft, and a first bearing and a second bearing which are respectively arranged at two opposite ends of the rotating shaft; the method is characterized in that: the stator comprises a frame-shaped stator yoke which is formed by bending a strip-shaped iron core and is arranged on the supporting frame, a plurality of stator teeth which are arranged on the frame-shaped stator yoke and coils which are respectively wound on the stator teeth; the supporting frame comprises a first bearing seat, a second bearing seat and a plurality of supporting rods for supporting the frame-shaped stator yoke, two opposite ends of each supporting rod are respectively connected with the first bearing seat and the second bearing seat, a spacing space for the stator teeth to be placed is arranged between every two adjacent supporting rods, the first bearing is installed in the first bearing seat, and the second bearing is installed in the second bearing seat; the inner diameter of the inner circular holes of the stator teeth is smaller than that of the first bearing seat, and/or the inner diameter of the inner circular holes of the stator teeth is smaller than that of the second bearing seat.

2. The rotating electric machine according to claim 1, characterized in that: the frame-shaped stator yoke is fixedly bonded to the support rod.

3. The rotating electric machine according to claim 2, characterized in that: at least one of the support rods is provided with a slot, the slot extends along the length direction of the support rod, and the slot is positioned on one surface of the support rod close to the frame-shaped stator yoke.

4. A rotating electric machine according to claim 3, characterized in that: the length of the slot along the axial direction of the rotating shaft is smaller than the axial length of the frame-shaped stator yoke.

5. A rotating electric machine according to any one of claims 1 to 4, characterized in that: and at least one positioning protrusion used for being matched and positioned with the supporting rod is arranged on the inner side surface of the frame-shaped stator yoke.

6. The rotating electric machine according to claim 5, characterized in that: the two sides of the frame-shaped stator yoke corresponding to the support rods are respectively provided with the positioning protrusions, and a positioning groove for the support rods to be inserted in a matched mode is formed between every two adjacent positioning protrusions.

7. A rotating electric machine according to any one of claims 1 to 4, characterized in that: a soft gasket is arranged in the first bearing seat, and the first bearing is supported in the soft gasket.

8. The rotating electric machine according to claim 7, characterized in that: the inner surface of the first bearing seat in the radial direction is provided with a plurality of accommodating grooves at intervals, the soft gasket comprises soft arc-shaped flaps respectively arranged in the accommodating grooves, and the inner diameter of each soft arc-shaped flap is smaller than that of the first bearing seat.

9. The rotating electric machine according to claim 8, characterized in that: each accommodating groove axially penetrates through the first bearing seat, and at least one side of each soft arc-shaped flap radially protrudes outwards along the soft arc-shaped flap to form a flange.

10. The rotating electric machine according to claim 9, characterized in that: the flanges on at least one side of the soft arc-shaped flap are connected in a ring shape.

11. The rotating electric machine according to any one of claims 1 to 4, wherein: the bar-shaped iron core comprises a plurality of first iron core strips and a plurality of second iron core strips which are sequentially and alternately arranged, each first iron core strip is provided with the stator teeth, every two adjacent first iron core strips are respectively connected with two opposite ends of the second iron core strip, every two adjacent second iron core strips are respectively connected with two opposite ends of the first iron core strips, every two first iron core strips are adjacent to every two second iron core strips, and every groove is formed between every two first iron core strips and every two adjacent second iron core strips and is located on one surface, close to the stator teeth, of the bar-shaped iron core.

12. The fan, its characterized in that: comprising a rotating electric machine according to any of claims 1-11 and an impeller mounted on the shaft at an end adjacent the first bearing.