WO2019011047A1

WO2019011047A1 - Brushless turbine

Info

Publication number: WO2019011047A1
Application number: PCT/CN2018/085606
Authority: WO
Inventors: 佟威
Original assignee: 苏州华铭威智能科技有限公司
Priority date: 2017-07-10
Filing date: 2018-05-04
Publication date: 2019-01-17
Also published as: CN107196427B; CN107196427A

Abstract

Disclosed is a brushless turbine (1). The brushless turbine (1) comprises a front cover (3), a main body (2), a turbine blade (4), a controller assembly (7), a rotor assembly (5) and a stator assembly (6), wherein the stator assembly (6) comprises a bearing bracket (49), an electrical winding (55) and a silicon steel sheet magnetic conductor (45); a bearing sleeve (50) is axially arranged in the middle of the bearing bracket (49), and the rotor assembly (5) is axially mounted inside the bearing sleeve (50); one or more magnetic conduction legs (65) projecting inwardly are arranged on an inner side of the magnetic conductor (45), and the plurality of magnetic conduction legs (65) radially surround the bearing sleeve (50) to fix same; and a plurality of radially projecting winding support arms (47) are arranged on an outer side of the bearing sleeve (50), and each of the magnetic conduction legs (65) is located inside one of the winding support arms (47). The brushless turbine (1) integrates a plurality of components onto the bearing bracket (49), has a compact structure and a small volume, and can realize multiple functions by means of only one bearing bracket (49) component. During operation, a relatively high air flow and vacuum degree can be produced. The brushless turbine has a good operation performance, while making the product miniaturized and lightweight.

Description

Brushless turbine

Technical field

The present invention relates to a brushless turbine, and more particularly to a brushless turbine for use in a vacuum cleaner.

Background technique

Engineers and technicians are now continually striving to design smaller vacuum cleaner brushless turbines. The stator assembly is designed to have a plurality of extension functions for a part, so that a smaller vacuum cleaner brushless turbine is realized, and the overall lightweight design of the product is realized, and a high-speed brushless turbine will be realized through a higher rotation speed. Achieve higher flow and vacuum.

Summary of the invention

The technical problem to be solved by the present invention is to provide a brushless turbine which integrates a plurality of structures, has a compact structure, a small volume, and can generate a high air flow rate and a vacuum degree during operation, thereby miniaturizing the product. It has good working performance while being lightweight.

In order to solve the above technical problem, the technical solution adopted by the present invention is to provide a brushless turbine including a front cover, a main body, a turbine blade, a controller assembly, a rotor assembly and a stator assembly, the stator assembly including a bearing bracket And an electric winding and a silicon carbide guide magnet, wherein a bearing sleeve is axially disposed at a center of the bearing bracket, wherein the rotor assembly is axially mounted in the bearing sleeve, and the inner side of the magnetizer is provided with one or more inward convexities The magnetic guiding leg and the plurality of magnetic guiding legs radially surround the fixed bearing sleeve.

In a preferred embodiment of the invention, the interior of the winding arm is a cavity for receiving a magnetically conductive leg that extends into the wall of the bearing sleeve or through the inner wall of the bearing sleeve.

In a preferred embodiment of the invention, the outer side of the bearing sleeve is provided with a plurality of radially projecting winding arms, each of which is located in a winding arm. The plurality of magnetically conductive legs are arranged in a "+" shape, a "-" shape, an "x" shape, a "*" shape or a "C" shape around the bearing sleeve.

In a preferred embodiment of the present invention, the rotor assembly includes a pair of bearings, a central shaft, and a permanent magnet, wherein the permanent magnet and the pair of bearings are each mounted on the central shaft, and the pair of bearings are respectively located in the permanent magnet axial direction. end.

In a preferred embodiment of the invention, the central shaft and the surface of the permanent magnet contact portion are provided with external threads or knurls.

In a preferred embodiment of the invention, a wave washer is disposed between the rotor assembly and the bearing sleeve axially.

In a preferred embodiment of the invention, the bearing bracket is provided with a Hall bracket, and the Hall bracket is located outside the bearing sleeve.

In a preferred embodiment of the invention, the Hall bracket is mounted with a Hall sensor, and the front surface of the Hall sensor faces the permanent magnet.

In a preferred embodiment of the present invention, the bearing bracket is provided with a conductive sheet bracket, and the conductive sheet bracket is located outside the bearing sleeve.

In a preferred embodiment of the present invention, the bearing bracket is mounted with a conductive sheet, and the conductive sheet is electrically connected to the controller assembly and the electrical winding at the same time.

The invention has the beneficial effects that the brushless turbine of the invention integrates multiple components into one bearing bracket, is compact and small in size, and a bearing bracket component realizes multiple functions, and can generate higher air during operation. The flow rate and vacuum degree make the product compact and lightweight while having good working performance.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained according to these drawings without any creative work, wherein:

1 is a first isometric view of a main body of a brushless turbine of the present invention:

2 is a second isometric view of the main body of the brushless turbine of the present invention:

Figure 3 is an exploded view of the brushless turbine:

Figure 4 is a first isometric view of the main body of the brushless turbine:

Figure 5 is a second isometric view of the main body of the brushless turbine:

Figure 6 is a top view of the main body of the brushless turbine:

Figure 7 is a cross-sectional view of the main body of the brushless turbine:

Figure 8 is a partial cross-sectional view of the upper cover of the brushless turbine:

Figure 9 is an isometric view of the top cover of a brushless turbine:

Figure 10 is an isometric view of the turbine blade of a brushless turbine:

Figure 11 is a top view of the turbine blade of a brushless turbine:

Figure 12 is an isometric view of the rotor assembly of a brushless turbine:

Figure 13 is an exploded view of the rotor assembly of a brushless turbine:

Figure 14 is a first isometric view of the stator assembly of a brushless turbine:

Figure 15 is a second isometric view of the stator assembly of a brushless turbine:

Figure 16 is a first isometric cross-sectional view of a stator assembly of a brushless turbine:

17 is a second isometric cross-sectional view of a stator assembly of a brushless turbine:

Figure 18 is a first isometric view of the bearing bracket of a brushless turbine:

Figure 19 is a second isometric view of the bearing bracket of a brushless turbine:

Figure 20 is a cross-sectional side view of the bearing bracket of a brushless turbine:

Figure 21 is a cross-sectional isometric view of a bearing bracket of a brushless turbine:

Figure 22 is an isometric view of a conductive sheet of a brushless turbine:

Figure 23 is a top plan view of the magnetizer of a brushless turbine:

Figure 24 is a cross-sectional side view of the assembly of the brushless turbine:

Figure 25 is a cross-sectional side view of the assembly of the brushless turbine, the arrows indicating the direction of movement of the air fluid in the brushless turbine.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIGS. 1 through 25, the brushless turbine 1 includes a main body 2, a front cover 3, a rotor assembly 5, a stator assembly 6, and a controller assembly 7. The main body 2 has a cylindrical shape and includes (shown by a broken line in the cross section) the turbine chamber 30 and the side wall 31. The turbine chamber 30 and the side wall 31 are connected and fixed by a plurality of air guiding blades 26, and the three form a plurality of air guiding openings 25, among which many The outer side of the air guiding vane 26 is provided with a step smaller than the side wall 31. The outer side of the step is provided with a positioning groove 28 and a plurality of latching positions 27, and the end surface 20 at the center of the turbine chamber 30 is provided with a hole in the center, and the counter surface hole 21 is provided. And a pair of screw posts 22 and a plurality of reinforcing ribs 23, a chamfer 24 positioned outside the turbine cavity 30, wherein the inner side behind the side wall 31 is provided with a limiting collar 29.

The front cover 3 has a cylindrical shape and includes a positioning rib 32 positioned below the end of the cylindrical outer wall and a plurality of card slots 31 on the inner side of the cylindrical outer wall.

The turbine blade 4 is a spiral semi-open type comprising a plurality of helical blades 33 and a plurality of semi-helical blades 34 positioned on the wheel 37, the angle between the top end face 36 of the semi-helical blade 34 and the central axis 38 being greater than or equal to 88 degrees A hole 35 through which the center shaft 41 is axially penetrated is provided at the center of the turbine blade 4.

The rotor assembly 5 includes a central shaft 41, a permanent magnet 42 and a permanent magnet sleeve 43. The permanent magnet sleeve 43 is sleeved on the permanent magnet 42. The permanent magnet 42, the pair of

bearings

39, 40 and the turbine blade 4 are axially fixed to the center. On the shaft 41. The surface of the central shaft 41 is provided with an external thread 44 or a knurling process, the purpose of which is to make the surface of the central shaft 41 more accommodating the adhesive, and the permanent magnet 42 is axially fitted and fixed to the central shaft 41 with the external thread 44. On a segment, more adhesive can secure the permanent magnet 42 to the central shaft 41. A pair of

bearings

39, 40 are respectively distributed on both sides of the permanent magnet 42, and a pair of bearings spaced apart along the shaft provide stability of the rotor assembly, and a relatively compact rotor assembly can be realized. As a result, the

bearings

39, 40 located on both sides of the permanent magnet 42 can be axially fixed to a relatively high coaxial part, which will solve the different shaft problems caused by the fixing of a pair of bearings to the two parts. , thereby increasing the life of the bearing while compressing the axial space. The pair of

bearings

39, 40 of the rotor assembly 4 are mounted in the primary molded bearing sleeve 50, which provides good control of the coaxial accuracy, so that the life of the bearing can be effectively ensured.

The stator assembly 6 includes a bearing bracket 49, a silicon steel sheet magnet 45, an electrical winding 55, a Hall sensor 52, and a conductive sheet 54.

The bearing bracket 49 includes a bearing sleeve 50 in the form of a sleeve. The bearing sleeve 50 has an end cap 51 at one end and a hole in the center. Both the bearing sleeve 50 and the end cap 51 form a bearing sleeve assembly with an end cap. The assembly 5 is axially mounted in the bearing sleeve 50, and a wave washer 67 is disposed between a bearing 40 of the rotor assembly 5 and the inner side of the end cover 51. The wave washer 67 can effectively control the preload of the rotor assembly and cause the bearing to move. The problem is that good control and the life of the bearing can be well guaranteed.

The bearing bracket 49 includes a Hall bracket 46 located outside the bearing sleeve 50. The Hall sensor 52 is axially loaded into the Hall bracket 46, which is positioned over the bearing 40 and adjacent to the permanent magnet 42 of the rotor assembly, specifically mounted to receive the Hall signal. quasi. At the same time, the Hall sensor 52 and the controller assembly 7 are fixedly connected, because the Hall bracket 46 and the bearing bracket 49 are molded once, which can precisely control the angle, position, and distance of the Hall sensor 52 and the permanent magnet 42. This provides a good guarantee of the stability of the received signal and a more compact structure.

The bearing bracket 49 includes

conductive sheet brackets

53, 57 at the outer ends of the bearing sleeve 50. The end cover 51 is provided with a plurality of limiting ribs 56. The structural components are molded once, which can reduce the installation link and improve the assembly. The efficiency and the component size are precisely controlled and the strength is good, and a pair of conductive sheets 54 can be well fixed. The pair of conductive sheets 54 are simultaneously connected to the electric winding 55 and the controller assembly 7. The

conductive sheet holders

53, 57 and the outer side are provided with a cable slot. 58, the purpose is to locate the electric winding 55, which can well control the positive and negative poles of the electric winding 55 to not contact, the electric wire 55 is wound around the bearing sleeve 50 when the positive and negative poles are changed, and is positioned in the card slot Inside the 58, the above scheme uses the radial space, and the overall axial dimension of the machine does not increase, so a relatively compact structure is realized.

The bearing bracket 49 includes a plurality of winding arms 47 that surround the outside of the bearing sleeve 50. The plurality of winding arms 47 are "+" shaped, "-" shaped, "x" shaped, "*" shaped around the bearing sleeve 50. Or a "C"-shaped arrangement, both the winding arm 47 and the bearing sleeve 50 are molded once, while the silicon steel sheet magnets 45 are formed into the inside of the plurality of winding arms 47, and the winding arms 47 are formed. The upper and lower ends are provided with process holes 60 for preventing the axial movement of the magnets 45 during the molding process, and the electric windings 55 are wound around the plurality of winding arms 47.

The method of assembling the stator assembly 6 will be described below.

Since most of the structure and function of the stator assembly 6 are integrated on the bearing bracket 49, this is done to achieve a relatively compact structure while avoiding the cumulative tolerance problem of multiple parts, achieving a relatively compact structure and accuracy of the main parts.

The method of assembling the stator assembly 6 will be described below.

The bearing bracket 49 is molded, and a plurality of magnetic guiding legs 65 of the silicon steel sheet magnet 45 are loaded into the mold, and a plurality of silicon steel sheet magnetic guiding legs 65 are disposed on the winding arm 47 after molding. The inside, in which the winding arm 47 is provided with the process hole 60 above and below, is intended to prevent the steel sheet magnetic guiding leg 65 from swaying inside the mold during molding.

A pair of conductive sheets 54 are tightly fitted into a plurality of limiting ribs 56 of the bearing bracket 49, wherein the latching posts 63 of the conductive sheets 54 are simultaneously tightly press-fitted into the

conductive sheet holders

53, 57, three of which are A small amount of adhesive is applied to the mating position, and the three will be bonded together at intervals of several hours. It is also possible to use a relatively high-duty tooling fixture to hold the three tightly together so that no adhesive is needed.

The bearing bracket 49 is now machined into the stator assembly 6, but this is also a semi-finished product comprising a bearing bracket 49, a silicon steel sheet magnet 45, and a pair of conductive sheets 54, each of which is wound around a plurality of winding arms 47. . The conductive sheet 54 is provided with a plurality of corners 62 connected to the electric winding 55. Before the electric winding 55 is wound, it is in a semi-open form, and after the winding is completed, the corner 62 encloses the electric winding 55 in the inner space bent by the corner 62. And the tooling fixture is used to flatten the corner 62. Thereafter, the electric windings 55 are welded and fixed in the bending space inside the corners 62 by welding.

The Hall sensor 52 is axially loaded into the Hall bracket 46 with a small amount of adhesive to be fixedly bonded. The controller 7 simultaneously connects the Hall sensor 52 and the conductive sheet 54, wherein the end portion 61 of the conductive sheet 54 and the controller assembly 7 are soldered and fixed, and the three signal legs of the Hall sensor 52 are soldered and fixed to the controller 7. A stator assembly is assembled.

The assembly method of the brushless turbine will now be described:

The rotor assembly 5 and the wave washer 67 are axially mounted inside the bearing sleeve 50 of the stator assembly 6. The stator assembly 6 is axially mounted to the main body 2 and terminates in a limit collar 29, and the outer circumference of the bearing sleeve 50 is fitted into the positioning hole 21 to terminate inside the end face 20. The screw cap 48 and the screw post 21 are locked and fixed by screws.

At the center of the turbine blade 4 is provided a hole 35, and the central shaft 41 is axially pressed into the hole 35, and the edge plane of the wheel 37 is aligned with the top surface of the chamfer 24 at the center of the main body 2, which will be used for machining. The press fitting is completed, and a small amount of adhesive is fixed at the joint of the hole 35 and the shaft 41.

The front cover 3 is set on the main body 2, and the positioning ribs 32 of the front cover 3 are assembled and fixed with the positioning grooves 28 of the main body 2. The plurality of card slots 66 of the front cover 3 are assembled on the plurality of card positions 27 of the main body 2. Upper, at the same time, the joint of the front cover 3 and the main body 2 is fixed by applying a small amount of adhesive.

The controller assembly 7 is located behind the machine and is fixed to a plurality of parts of the stator assembly 6, including soldering and fixing to a pair of conductive sheets 54, and soldering to the Hall sensor 52, and electrically conducting therebetween. So far, a brushless turbine has been completed.

The working principle of a brushless turbine will be described below:

The power supply supplies power to the controller assembly 7, the controller assembly 7 identifies the current rotor assembly 5 position by the Hall sensor 52, then the controller assembly 7 supplies power to the conductive strips 54, and the conductive strips 54 power the electrical windings 55 through the controller assembly 7. Control, the electric winding 55 starts to excite the magnetic guiding leg 65, the magnetic guiding leg 65 drives the rotor assembly 5 by magnetic field conversion, the starting rotor assembly 5 rotates 360 degrees, and the turbine blade 4 at the front end of the rotor assembly 5 also rotates. The rotation of the turbine blade 4 in the cavity generates a negative pressure, and the state of the air fluid at this time is the airflow from the turbine port and the wind flow through the turbine blade 4 at the air outlet 25 of the body 2. Negative pressure has been generated before this, and then the airflow cools the stator assembly 6 and the controller assembly 7, and the airflow exits the brushless turbine 1 between the periphery of the controller assembly 7 and the body 2.

The above is only the embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification of the present invention, or directly or indirectly applied to other related technical fields, The same is included in the scope of patent protection of the present invention.

Claims

A brushless turbine includes: a front cover, a main body, a turbine blade, a controller assembly, a rotor assembly, and a stator assembly, the stator assembly including a bearing bracket, an electrical winding, and a silicon carbide magnet, characterized in that A bearing sleeve is axially disposed at a center of the bearing bracket, wherein the rotor assembly is axially mounted in the bearing sleeve, and the inner side of the magnetizer is provided with one or more inwardly projecting magnetic guiding legs, and a plurality of magnetic guiding legs Radially surround the fixed bearing sleeve.
A brushless turbine according to claim 1 wherein the outer side of the bearing sleeve is provided with a plurality of radially projecting winding arms, each of which is located within a winding arm.
A brushless turbine according to claim 2, wherein the inside of the winding arm is a cavity for accommodating the magnetically conductive leg, the cavity extending into the wall of the bearing sleeve or penetrating into the inner wall of the bearing sleeve.
A brushless turbine according to claim 1, wherein the plurality of magnetically conductive legs are arranged in a + shape.
A brushless turbine according to claim 1 wherein the plurality of magnetically conductive legs are arranged in a shape.
A brushless turbine according to claim 1 wherein the plurality of magnetically conductive legs are arranged in an x-shape.
A brushless turbine according to claim 1, wherein the plurality of magnetically conductive legs are arranged in a * shape.
A brushless turbine according to claim 1, wherein the plurality of magnetizers are arranged in a C shape.
A brushless turbine according to any one of claims 1 to 8, wherein the rotor assembly comprises a pair of bearings, a central shaft and a permanent magnet, wherein the permanent magnet and the pair of bearings are fitted on the central shaft, And a pair of bearings are respectively located at the axial ends of the permanent magnet.
A brushless turbine according to claim 9, wherein said central shaft and the surface of the permanent magnet contact portion are provided with external threads or knurls.
A brushless turbine according to claim 9, wherein a wave washer is provided between the rotor assembly and the bearing sleeve axially.
A brushless turbine according to any one of claims 1 to 8, wherein the bearing bracket is provided with a Hall bracket, and the Hall bracket is located outside the bearing sleeve.
A brushless turbine according to claim 12, wherein a Hall sensor is mounted on the Hall bracket, and a front surface of the Hall sensor faces the permanent magnet.
A brushless turbine according to any one of claims 1 to 8, wherein the bearing holder is provided with a conductive sheet holder, and the conductive sheet holder is located outside the bearing sleeve.
A brushless turbine according to claim 14, wherein said bearing holder is provided with a conductive sheet, and the conductive sheet is electrically connected to both the controller assembly and the electrical winding.