CN218760606U - Fixed impeller assembly, dust collector motor and dust collector - Google Patents

Abstract

The utility model relates to a decide impeller subassembly, dust catcher motor and dust catcher. The fixed impeller assembly comprises a plurality of fixed impellers which are coaxially arranged, each fixed impeller comprises a wheel body and a plurality of blades arranged along the circumferential outer surface of the wheel body, each blade comprises a root part fixed to the wheel body, a top part spaced apart from the wheel body, a front edge extending between the root part and the top part, and a rear edge extending between the root part and the top part; the blades in each fixed impeller are arranged in a one-to-one correspondence mode, and in any two adjacent fixed impellers, the front edges and the rear edges of the two corresponding blades are connected, so that the corresponding blades in the fixed impellers form a continuous combined blade; in the projection of the fixed vane wheel assembly on a first plane, the projections of two adjacent combined vanes have an overlapping area, wherein the first plane is perpendicular to the axial direction of the fixed vane wheel assembly. The utility model provides a fixed impeller subassembly, dust catcher motor and dust catcher efficiency are higher.

Description

Fixed impeller assembly, dust collector motor and dust collector

Technical Field

The utility model relates to a dust catcher technical field especially relates to fixed impeller subassembly, dust catcher motor and dust catcher.

Background

The fixed impeller, also called as an inducer, mainly plays a role in more effectively releasing wind flow generated by the movable impeller.

The stator vane wheel in the related art may generally include an outer ring, an inner ring disposed inside the outer ring, and a plurality of vanes connected between the outer ring and the inner ring. Wherein, each blade is arranged outside the inner ring in a spiral shape to form an air guide channel between adjacent blades. The fixed impeller is generally manufactured by adopting a die forming mode due to the complex structure of the fixed impeller.

However, the stator vane wheel manufactured in the related art is limited by the die forming process, and is prone to have problems of high airflow velocity at the outlet side, insufficient conversion of dynamic pressure and static pressure, and low motor efficiency.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is necessary to provide a fixed impeller assembly, a vacuum cleaner motor, and a vacuum cleaner, which have sufficient dynamic pressure and static pressure conversion and high efficiency, in order to solve the problem of low efficiency of the motor in the prior art.

A first aspect of embodiments of the present application provides a fixed impeller assembly, including a plurality of fixed impellers arranged coaxially, each fixed impeller including a wheel body and a plurality of vanes provided along an outer surface of the wheel body in a circumferential direction, each vane including a root portion fixed to the wheel body, a tip portion spaced apart from the wheel body, a leading edge extending between the root portion and the tip portion, and a trailing edge extending between the root portion and the tip portion;

the blades in each fixed impeller are arranged in a one-to-one correspondence manner, and in any two adjacent fixed impellers, the front edges and the rear edges of the two corresponding blades are connected, so that the corresponding blades in the fixed impellers form a continuous combined blade;

in the projection of the fixed vane wheel assembly on a first plane, the projections of two adjacent combined vanes have an overlapping area, wherein the first plane is perpendicular to the axial direction of the fixed vane wheel assembly.

In one embodiment, the leading edge of each blade is located forward of the trailing edge in the circumferential direction of the wheel body;

the projections of two adjacent blades of each fixed impeller in a plane perpendicular to the axial direction of the fixed impeller assembly do not overlap with each other.

In one embodiment, in any two adjacent fixed impellers, one fixed impeller is provided with a clamping part, and the other fixed impeller is provided with a clamping matching part clamped with the clamping part, so that the two adjacent fixed impellers are limited to move relatively to each other along the axial direction of the fixed impeller assembly.

In one embodiment, the wheel body is configured as a ring;

each fixed impeller further comprises an annular cover coaxially sleeved on the outer side of the wheel body in the circumferential direction, and the tops of the blades are connected to the annular cover;

the wheel bodies of the fixed impellers are connected with each other to form a flow guide inner ring, and the annular covers of the fixed impellers are connected with each other to form a flow guide outer ring;

the combined blades are positioned between the flow guide inner ring and the flow guide outer ring, and a fluid channel is defined by any two adjacent combined blades, the flow guide inner ring and the flow guide outer ring.

In one embodiment, the annular cover of the fixed impeller, the wheel body, and the blades connected between the annular cover and the wheel body are integrally formed, and the material is PA +% GF.

In one embodiment, each of the blades has a thickness of mm to mm.

In one embodiment, in any two adjacent fixed impellers, the clamping portion is disposed on a radial inner side surface of the wheel body of one of the fixed impellers, and the clamping and matching portion is disposed on the other fixed impeller and extends out of the radial inner side surface of the wheel body of the one fixed impeller to be clamped with the clamping portion.

In one embodiment, the clamping part is constructed as a clamping hook piece, and the clamping matching part is provided with a clamping groove for the clamping part to be clamped and hung.

In one embodiment, the number of the fixed impellers is two;

defining the fixed impeller positioned at the upstream in the airflow flowing direction as a first fixed impeller, and defining the fixed impeller positioned at the downstream in the airflow flowing direction as a second fixed impeller; the annular cover for defining the first fixed impeller is a first annular cover, and the annular cover for defining the second fixed impeller is a second annular cover;

the first annular cover and the first wheel body are respectively provided with a first matching part and a second matching part which extend towards the second fixed impeller and are annular, and the second annular cover and the second wheel body are respectively provided with a third matching part and a fourth matching part which extend towards the first fixed impeller and are annular;

wherein the first mating portion and the third mating portion are in contact with each other; the second mating portion and the fourth mating portion are in contact with each other.

In one embodiment, an inner side surface of the first fitting portion in the radial direction of the fixed impeller assembly is in abutting fit with an outer side surface of the third fitting portion in the radial direction of the fixed impeller assembly;

the outer side face of the second matching portion along the radial direction of the fixed impeller assembly is in mutual abutting fit with the inner side face of the fourth matching portion along the radial direction of the fixed impeller assembly.

In one embodiment, an inner side surface of the first fitting portion in the radial direction of the fixed impeller assembly, and an outer side surface of the third fitting portion in the radial direction of the fixed impeller assembly are configured as conical surfaces that match each other;

an outer side surface of the second fitting portion in the radial direction of the fixed impeller assembly and an inner side surface of the fourth fitting portion in the radial direction of the fixed impeller assembly are configured as conical surfaces that match each other;

an inner side surface of the first matching part along the radial direction of the fixed impeller component is defined, and the distance between the inner side surface of the first matching part and the outer side surface of the second matching part along the radial direction of the fixed impeller component is d;

the distance d gradually increases in the direction of the airflow.

In one embodiment, the first annular cover is provided with a first bearing part, and the first bearing part is used for abutting against the third matching part when the first matching part and the third matching part are matched;

the first wheel body is provided with a second bearing part, and the second bearing part is used for abutting against the fourth matching part when the second matching part and the fourth matching part are matched; and/or

The second annular cover is provided with a third bearing part, and the third bearing part is used for abutting against the first matching part when the first matching part and the third matching part are matched;

and a fourth bearing part is arranged on the second wheel body and is used for abutting against the second matching part when the second matching part and the fourth matching part are matched.

In one embodiment, one of the first fixed impeller and the second fixed impeller is provided with a positioning column, and the other is provided with a positioning groove matched with the positioning column;

the first matching portion and the third matching portion are in mutual contact, and when the second matching portion and the fourth matching portion are in mutual contact, the positioning column is inserted into the positioning groove.

In one embodiment, the outer side surface of the first annular cover along the radial direction is provided with a clamping convex structure.

In one embodiment, a base body is provided at an upstream side end surface of the first wheel body;

the fixed impeller component further comprises a baffle arranged on the base body, and the baffle is annular and is arranged on the radial inner side of the flow guide inner ring in a blocking mode.

In one embodiment, the profile of at least one combined blade is provided with a flow disturbing structure, so that the pressure distribution of the fluid channel at different positions in the airflow flowing direction is layered.

In one embodiment, the spoiler structure is configured as a concave structure or a convex structure formed on the profile of the composite blade;

and/or

The turbulent flow structure is located at the junction position of two adjacent blades forming the same combined blade.

In one embodiment, the fixed impellers are arranged in a staggered manner in the axial direction of the fixed impeller assembly to form a stepped structure on the inner wall of the fluid channel, and the stepped structure forms the turbulent flow structure.

In one embodiment, each of the combined blades is configured to have an airfoil shape, the leading edge of the combined blade is defined as a first leading edge, and the trailing edge of the combined blade is defined as a first trailing edge; the first leading edge is upstream in the airflow direction relative to the first trailing edge.

In one embodiment, the thickness of all the blades in the fixed blade wheel assembly is the same.

In a second aspect, an embodiment of the present application provides a vacuum cleaner motor, including a movable impeller and the above-mentioned fixed impeller assembly, the movable impeller and the fixed impeller assembly are coaxially disposed, and along an airflow flowing direction, the movable impeller is located upstream of the fixed impeller assembly.

In one embodiment, the motor of the dust collector further comprises an impeller cover, wherein the impeller cover is connected to the fixed impeller assembly and covers one side of the movable impeller, which is far away from the fixed impeller assembly; and/or

The vacuum cleaner motor further comprises a motor body, the motor body is located on one side, away from the movable impeller, of the fixed impeller component, and an output shaft of the motor body penetrates through the fixed impeller component and is in transmission connection with the movable impeller.

A third aspect of the embodiments of the present application provides a vacuum cleaner including the vacuum cleaner motor described above.

The fixed impeller component, the dust collector motor and the dust collector have the beneficial effects that:

by enabling the fixed impeller assembly to comprise a plurality of fixed impellers which are coaxially arranged, corresponding blades in the fixed impellers form a continuous combined blade, and projections of two adjacent combined blades on a first plane have an overlapping area.

Drawings

FIG. 1 is a schematic structural view of a vacuum cleaner motor according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of the cooperation between the impeller cover and the fixed impeller assembly in the motor of the vacuum cleaner provided in the embodiment of the present application;

FIG. 3 is an exploded view of the vacuum cleaner motor according to the embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a fixed impeller assembly provided in an embodiment of the present application;

FIG. 5 is a schematic view of another configuration of a fixed impeller assembly provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a fixed impeller assembly provided in an embodiment of the present application;

FIG. 7a is a schematic structural diagram of a fixed impeller assembly according to an embodiment of the present disclosure after partial cutting of an outer contour;

FIG. 7b is an enlarged view of a portion of FIG. 7 a;

FIG. 8 is another schematic structural diagram of the fixed impeller assembly according to the embodiment of the present disclosure after the outer contour is partially cut;

FIG. 9 is a simulation of pressure distribution in a prior art vacuum cleaner motor;

FIG. 10 is a simulation of pressure distribution in the motor of the vacuum cleaner provided in the embodiment of the present application;

FIG. 11 is a schematic diagram illustrating a process for constructing a fixed impeller assembly according to an embodiment of the present disclosure;

FIG. 12 is a cross-sectional view of a fixed impeller assembly provided in accordance with an embodiment of the present application;

fig. 13 is a partial enlarged view at B of fig. 12;

fig. 14 is a schematic structural diagram of a first fixed impeller in a fixed impeller assembly provided in an embodiment of the present application;

fig. 15 is a schematic structural view of a second fixed impeller in the fixed impeller assembly provided in the embodiment of the present application;

FIG. 16 is a schematic cross-sectional structural view of a combined blade in a fixed blade wheel assembly according to an embodiment of the present disclosure;

fig. 17 is a schematic structural view of a vacuum cleaner according to an embodiment of the present disclosure.

The reference numbers indicate:

100. a fixed impeller component; 110. combining the blades; 1101. a first leading edge; 1102. a first trailing edge; 120. a fluid channel; 130. an overlap region; 140. spacing; 150. a flow guide inner ring; 160. a flow guide outer ring;

10. fixing an impeller; 11. a wheel body; 12. a blade; 13. a fastening part; 14. a clamping fit part; 141. a clamping groove; 16. an annular cover; 121. a leading edge; 122. a trailing edge; 123. a root portion; 124. a top portion;

20. a first fixed impeller; 21. a first wheel body; 211. a second fitting portion; 2111. a second bearing part; 212. A fourth mating portion; 22. a first annular cover; 221. a first mating portion; 2211. a first bearing part; 222. A third mating portion; 23. a positioning column; 24. positioning a groove;

30. a second fixed impeller; 31. a second wheel body; 311. a fourth bearing part; 32. a second annular shield; 321. a third bearing part;

40. a snap-in projection structure; 41. a buckle structure; 42. a substrate; 50. a baffle plate; 60. a flow disturbing structure;

200. a cleaner motor; 210. a movable impeller; 220. an impeller housing; 230. a motor body;

300. a vacuum cleaner; 310. brushing the ground; 320. a dust cup; 330. a fuselage.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

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 at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

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 intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The stationary impeller assembly, the motor of the vacuum cleaner, and the vacuum cleaner according to the embodiments of the present application will be described with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a vacuum cleaner motor according to an embodiment of the present application, fig. 2 is a schematic structural view of a matching structure of a wheel cover and a fixed impeller assembly in the vacuum cleaner motor according to the embodiment of the present application, and fig. 3 is a schematic exploded structural view of the vacuum cleaner motor according to the embodiment of the present application.

Referring to fig. 1, 2 and 3, an embodiment of the present application provides a vacuum cleaner motor 200, including a movable impeller 210 and a fixed impeller assembly 100, where the movable impeller 210 is disposed coaxially with the fixed impeller assembly 100, and the movable impeller 210 is located on an upstream side S of the fixed impeller assembly 100 along an airflow flowing direction (as indicated by a dotted arrow in fig. 2).

Further, the motor 200 of the vacuum cleaner further includes an impeller cover 220, and the impeller cover 220 is connected to the fixed impeller assembly 100 and covers a side of the movable impeller 210 facing away from the fixed impeller assembly 100.

In some examples, the motor 200 further includes a motor body 230, the motor body 230 is located on a side of the fixed impeller assembly 100 facing away from the movable impeller 210, and an output shaft of the motor body passes through the fixed impeller assembly 100 and is in transmission connection with the movable impeller 210.

The operation of the cleaner motor 200 will be described, as shown in fig. 2 and 3, and the flow path of air is indicated by the dotted arrows. When the motor body 230 drives the movable impeller 210 to rotate, the airflow flows into the impeller cover 220 from the external environment, passes through the blades of the movable impeller 210, and flows into the blades of the fixed impeller assembly 100, in other words, the movable impeller 210 and the fixed impeller assembly 100 guide the airflow in the direction of the motor body 230 and then flow out of the cleaner motor.

In the embodiment of the present application, for convenience of description, the side of the fixed impeller assembly 100 facing the movable impeller 210 is defined as the upstream side S of the fixed impeller assembly 100, and the side of the fixed impeller assembly 100 facing away from the movable impeller 210 is defined as the downstream side X of the fixed impeller assembly 100. A plane perpendicular to the axial direction O of the fixed impeller member 100 is defined as a first plane N.

Fig. 4 is a schematic structural diagram of a fixed impeller assembly provided in an embodiment of the present application.

The fixed impeller assembly 100 of the present embodiment includes a plurality of fixed impellers 10 coaxially arranged, and the plurality of fixed impellers 10 may be stacked.

It should be noted that, in fig. 4, the fixed impeller assembly 100 is described by taking an example that two fixed impellers 10 are included, of course, the number of the fixed impellers 10 in the fixed impeller assembly 100 may also be set according to actual needs, and it is understood that the number of the fixed impellers 10 is similar to that in other cases, and is not described again here.

Each stator blade 10 includes a wheel body 11 and a plurality of blades 12 provided along an outer surface of the wheel body 11 in a circumferential direction, each blade 12 including a root portion 123 fixed to the wheel body 11, a tip portion 124 spaced apart from the wheel body 11, a leading edge 121 extending between the root portion 123 and the tip portion 124, and a trailing edge 122 extending between the root portion 123 and the tip portion 124. Note that, here, the leading edge 121 actually refers to the end of the blade 12 near the upstream side S, and the trailing edge 122 refers to the end of the blade 12 near the downstream side.

The blades 12 in each fixed impeller 10 are arranged in a one-to-one correspondence manner, and in any two adjacent fixed impellers 10, the front edges 121 and the rear edges 122 of the two corresponding blades 12 are connected, so that all the corresponding blades 12 in the plurality of fixed impellers 10 form a continuous combined blade. Wherein, a fluid passage for guiding flow is formed between any two adjacent combination blades 110.

In addition, the thickness of all the blades 12 included in the fixed blade assembly 100 may be the same to facilitate demolding.

Fig. 5 is a schematic view of another structure of the fixed impeller component provided in the embodiment of the present application, fig. 6 is a schematic view of a structure of the fixed impeller component provided in the embodiment of the present application, fig. 7a is a schematic view of a structure of the fixed impeller component provided in the embodiment of the present application after the outer contour is partially cut, fig. 7b is a partial enlarged view of a point a in fig. 7a, and fig. 8 is another schematic view of the structure of the fixed impeller component provided in the embodiment of the present application after the outer contour is partially cut.

Referring to fig. 5 and 6, in the projection of the fixed blade assembly 100 on the first plane N, the projections of two adjacent combined blades 110 have an overlapping region 130 (shown by hatching in fig. 6). Here, in the fixed vane assembly 100, the projections of any two adjacent combined vanes 110 on the first plane N each have an overlapping region 130, which makes the length of the combined vane 110 longer.

In the above-mentioned solution, by making the fixed impeller assembly 100 include a plurality of fixed impellers 10 coaxially arranged, the corresponding blades 12 in the plurality of fixed impellers 10 form a continuous combined blade 110, and the projections of two adjacent combined blades on the first plane N have the overlapping region 130, compared with the case that the projections of two adjacent combined blades are spaced from each other in the prior art, the length of the fluid passage formed between the adjacent combined blades 110 in the present application is longer, so that the flow velocity of the air flow at the outlet of the fixed impeller assembly 100 on the downstream side of the air flow can be lower, the dynamic pressure and static pressure conversion is sufficient, and the efficiency of the vacuum cleaner motor is improved.

In the embodiment of the present application, referring to fig. 6, 7a, and 7b, in the circumferential direction of the wheel body 11, the front edge 121 of each blade 12 is located in front of the rear edge 122, and the projections of two adjacent blades 12 of each stator blade 10 in the first plane N do not overlap each other. In other words, each stator blade 10 includes a projection of the blade 12 on the first plane N, a space is provided between projections of two adjacent blades 12, or projections of two adjacent blades 12 of each stator blade 10 on the first plane N, of the leading edge 121 and the trailing edge 122 adjacent to each other, meet each other. Thus, the molding difficulty of a single-layer fixed impeller 10 can be reduced, a plurality of fixed impellers 10 are laminated, and each fixed impeller 10 participates in the forming process of the fluid passage 120, so that the length of the fluid passage 120 is longer, and the efficiency of the dust collector motor 200 is improved.

In the present embodiment, with continued reference to fig. 7a, 7b, and 8, the wheel body 11 is configured as a ring-shaped member; each impeller 10 further includes an annular shroud 16 coaxially fitted around the circumferential outer side of the impeller body 11, and the tips 124 of the blades 12 are connected to the annular shroud 16. In other words, the annular cover 16 surrounds the outer side of the wheel body 11 with a space from the outer side surface of the wheel body 11 in the circumferential direction, and the vanes 12 may be located in the space.

The wheel bodies 11 of the fixed impellers 10 are connected with each other to form a guide inner ring 150, and the annular covers 16 of the fixed impellers 10 are connected with each other to form a guide outer ring 160;

the combination blades 110 are located between the inner guide ring 150 and the outer guide ring 160, and any two adjacent combination blades 110, the inner guide ring 150 and the outer guide ring 160 define a fluid passage 120. The air flow from the automotive impeller enters the fluid passageway 120. As described above, compared with the existing blades, the combined blades 110 are longer in length in the air flowing direction, so that the length of the fluid channel 120 defined by any two adjacent combined blades 110 together with the inner guide ring 150 and the outer guide ring 160 is longer, which can make the airflow velocity at the outlet of the fixed impeller assembly 100 on the downstream side of the airflow flow lower, and make the dynamic pressure and static pressure conversion sufficient, thus improving the efficiency of the vacuum cleaner motor.

In the embodiment of the present application, referring to fig. 7b and 8, a turbulence structure 60 is disposed on the profile of at least one of the combined blades 110, so that the pressure distribution of the fluid channel 120 at different positions in the airflow flowing direction is layered, which can decompose the vortex in the fluid channel 120, quickly dissipate energy, reduce turbulence noise formed by the vortex in the fluid channel 120, reduce vibration of the vacuum cleaner motor, and reduce noise.

The turbulator structure 60 may be located at the interface of two adjacent blades 12 that comprise the same composite blade 110.

In some embodiments, the turbulator structure 60 is configured as a recessed structure or a raised structure (not shown) formed on the profile of the composite blade 110.

Referring to fig. 7b and 8, as a possible embodiment, a plurality of fixed impellers 10 are arranged in a staggered manner in the axial direction of the fixed impeller assembly 100 to form a stepped structure on the inner wall of the fluid passage 120, and the stepped structure forms the spoiler structure 60.

The staggered arrangement enables the pressure distribution from the upstream side S to the downstream side X in the fluid channel 120 to be layered, pressure can be quickly released at the outlet of the fluid channel 120 due to the fall of the fluid channel 120, pressure pulsation can be reduced, meanwhile, the staggered structure can also affect the vortex at the inlet of the fluid channel 120, vortex disturbance at the inlet is increased, vortex micro-aggregates formed by airflow can be effectively crushed, energy transfer is accelerated, energy accumulation is reduced, and accordingly turbulence noise formed by the vortex is reduced.

Fig. 9 is a simulation diagram of pressure distribution in a vacuum cleaner motor according to the related art, and fig. 10 is a simulation diagram of pressure distribution in a vacuum cleaner motor according to an embodiment of the present application.

A flow disturbing structure is not arranged in a fluid channel of an existing dust collector motor, referring to fig. 9, airflow enters from a high-pressure area on the left side of a drawing of fig. 9, and because the air is in a turbulent flow state, large eddy currents are generated in a flow guide flow channel, the eddy currents are accumulated in an impeller, energy cannot be dissipated quickly, the dust collector motor is unstable, pressure fluctuation is caused, and vibration noise and eddy current noise of the dust collector motor are caused.

Specifically, the region 43 corresponds to the region of the fixed impeller in the prior art, and the pressure therein is approximately between-4.457e +03Pa and-2.914e +03Pa, which is relatively large.

The fluid channel 120 of the vacuum cleaner motor according to the embodiment of the present application is provided with the spoiler structure 60, and particularly, the fluid channels 120 of the adjacent fixed impellers 10 are arranged in a staggered manner in design, referring to fig. 10, the vortex at the fixed impeller assembly 100 is significantly improved, the vortex amount is significantly reduced, and the noise is improved.

Specifically, region 44 corresponds to the region of fixed impeller assembly 100 in which the pressure is approximately in the region of-1.036 e +03Pa to-2.564e +03Pa, which is significantly reduced as compared to region 43 of the prior art.

In the embodiment of the present application, the stator vane wheel 10 may be manufactured by injection molding, the material is generally a plastic material, and the stator vane wheel may select a metal material with higher strength because of the need of higher rotation speed in the working process, and the stator vane wheel is a stationary component and may adopt an injection molded plastic part, so that not only the processing technology may be saved, but also the weight of the stator vane wheel 10 is lighter.

Specifically, the annular cover 16, the wheel body 11, and the vanes 12 connected between the annular cover 16 and the wheel body 11 of the stator vane wheel 10 are formed integrally with PA66+30% gf, so that the annular cover 16, the wheel body 11, and the vanes 12 connected between the annular cover 16 and the wheel body 11 of the stator vane wheel 10 have high strength.

Illustratively, each blade has a thickness of 1mm to 5mm.

Fig. 11 is a schematic diagram illustrating a construction process of a fixed impeller assembly according to an embodiment of the present application.

Referring to fig. 11, in the circumferential direction of the wheel body 11, the leading edge 121 of each blade 12 is located in front of the trailing edge 122; and the projections of the adjacent two blades 12 of each fixed impeller 10 in the first plane N do not overlap with each other, that is, the projections of the adjacent leading edge 121 and trailing edge 122 in the projection of the adjacent two blades 12 of each fixed impeller 10 on the first plane N meet each other, or the projections of the adjacent leading edge 121 and trailing edge 122 in the first plane N do not overlap with each other, with a space 140. After the two fixed impellers 10 shown in fig. 11 are stacked on each other, it can be seen that the space 140 generated in plan view of the fixed impeller 10 on the left side of the drawing of fig. 11 is filled with the fixed impeller 10 on the right side of the drawing of fig. 11, that is, the present application realizes an increase in the length of the fluid passage 120 of the fixed impeller assembly 100 while making mold opening (during injection molding) of the single fixed impeller 10 simpler.

Fig. 12 is a sectional view of a fixed impeller assembly provided in an embodiment of the present application, fig. 13 is a partially enlarged view of a portion B of fig. 12, fig. 14 is a schematic structural view of a first fixed impeller in the fixed impeller assembly provided in the embodiment of the present application, and fig. 15 is a schematic structural view of a second fixed impeller in the fixed impeller assembly provided in the embodiment of the present application.

As mentioned above, the number of the fixed impellers 10 can be set as required, in the following drawings and descriptions, the number of the fixed impellers 10 is taken as two for the description of the present application, and the description is omitted here for the case where the number of the fixed impellers 10 is otherwise the same.

As for the connection of the adjacent fixed impellers 10, for example, the connection and the separation prevention of the adjacent fixed impellers 10 in the axial direction of the fixed impeller assembly 100, as shown in fig. 12 and 13, one fixed impeller 10 of any two adjacent fixed impellers 10 is provided with an engaging portion 13, and the other fixed impeller 10 is provided with a snap-fit portion 14 which is engaged with the engaging portion 13, so as to restrict the movement of the two adjacent fixed impellers 10 relative to each other in the axial direction O of the fixed impeller assembly.

In a specific implementation, referring to fig. 13, 14, and 15, in any two adjacent fixed impellers 10, the engaging portion 13 is disposed on a radial inner side surface of the wheel body 11 of one of the fixed impellers 10, and the snap-fit portion 14 is disposed on the other fixed impeller 10 and extends to a radial inner side surface of the wheel body 11 of one of the fixed impellers 10 to be engaged with the engaging portion 13.

Illustratively, the engaging portion 13 is configured as a hook, and the snap-fit portion 14 is provided with a snap groove 141 for the engaging portion 13 to be snapped. The number of the engaging portions 13 and the snap-fit portions 14 may be set as needed, and in the present embodiment, two sets of the engaging portions 13 and the snap-fit portions 14 are provided, and the two sets of the engaging portions 13 and the snap-fit portions 14 are provided oppositely, and the number thereof may be other, as illustrated with reference to fig. 12.

Referring to fig. 13, 14, and 15, when the number of the fixed vanes 10 is two, for convenience of description, the fixed vane wheel located on the upstream side S in the airflow direction is defined as the first fixed vane wheel 20, and the fixed vane wheel located on the downstream side X in the airflow direction is defined as the second fixed vane wheel 30. The annular shroud defining the first stator impeller 20 is a first annular shroud 22 and the annular shroud defining the second stator impeller 30 is a second annular shroud 32. The wheel body defining the first stator vane wheel 20 is the first wheel body 21, and the wheel body defining the second stator vane wheel 30 is the second wheel body 31.

For the radial positioning between two adjacent fixed impellers 10, the first annular cover 22 and the first wheel body 21 are respectively provided with a first matching portion 221 and a second matching portion 211 which extend towards the second fixed impeller 30 and are annular, and the second annular cover 32 and the second wheel body 31 are respectively provided with a third matching portion 222 and a fourth matching portion 212 which extend towards the first fixed impeller 20 and are annular. Here, the first, second, third and fourth engaging portions 221, 211, 222 and 212 are all ring-shaped members.

Wherein the first mating portion 221 and the third mating portion 222 contact each other; the second fitting portion 211 and the fourth fitting portion 212 contact each other. This prevents the leakage of the air flow at the interface between the two stator vanes, and provides the fluid passage 120 with better air tightness.

In a specific implementation, the inner side surface of the first fitting portion 221 in the radial direction of the fixed impeller assembly 100 and the outer side surface of the third fitting portion 222 in the radial direction of the fixed impeller assembly 100 may be fitted to each other;

the inner side surface of the second fitting portion 211 in the radial direction of the fixed vane wheel assembly 100 is fitted in abutment with the outer side surface of the fourth fitting portion 212 in the radial direction of the fixed vane wheel assembly 100.

It can be understood that, during the process of the fixed impeller 10, there is inevitably a problem that the processing precision is not accurate enough, and there is a possibility that the first matching portion 221 and the third matching portion 222, or the second matching portion 211 and the fourth matching portion 212 cannot contact each other, and in order to avoid this, the radial matching precision of two adjacent fixed impellers 10 is improved, it may be considered that the inner side surface of the first matching portion 221 along the radial direction of the fixed impeller assembly 100, and the outer side surface of the third matching portion 222 along the radial direction of the fixed impeller assembly 100 are configured as conical surfaces matching each other. In this way, even if the machining accuracy of the first engagement portion 221 and the third engagement portion 222 is slightly poor, the first engagement portion 221 and the third engagement portion 222 can be brought into contact with each other by adjusting the relative positions thereof in the axial direction.

Further, the outer side surface of the second fitting portion 211 in the radial direction of the stator-impeller assembly 100 and the inner side surface of the fourth fitting portion 212 in the radial direction of the stator-impeller assembly 100 are configured as conical surfaces that match each other, so that even if the machining accuracy of the second fitting portion 211 and the fourth fitting portion 212 is slightly poor, the contact of the second fitting portion 211 and the fourth fitting portion 212 can be achieved by adjusting the relative positions thereof in the axial direction.

Note that the inner side surface of the first engagement portion 221 in the radial direction of the fixed impeller assembly 100 needs to be inclined in the opposite direction to the outer side surface of the second engagement portion 211 in the radial direction of the fixed impeller assembly 100.

Specifically, a distance d is defined between an inner side surface of the first matching portion 221 in the radial direction of the fixed impeller assembly 100 and an outer side surface of the second matching portion 211 in the radial direction of the fixed impeller assembly 100;

the spacing d gradually increases in the direction of the airflow, i.e., the direction from the upstream side S toward the downstream side X. That is, the third fitting portion 222 and the fourth fitting portion 212 are fitted with the first fitting portion 221 and the second fitting portion 211 in a wedge-shaped manner, so that the radial deviation of fitting is small, air leakage around the fitting is not easy, and noise can be reduced.

As described above, the third mating portion 222 and the fourth mating portion 212 define mating surfaces of a substantially inverted cone shape, and the end portions are small in size and easily fit into the large grooves defined by the first mating portion 221 and the second mating portion 211, so that the fitting process is simple and easy.

With reference to fig. 13, the first annular cover 22 is provided with a first bearing portion 2211, and the first bearing portion 2211 is configured to abut against the third matching portion 222 when the first matching portion 221 and the third matching portion 222 are matched. Here, the first receiving portion 2211 may be a receiving surface provided on the first annular cover 22, and the first receiving portion 2211 is further located inside the first fitting portion 221.

A second bearing portion 2111 is arranged on the first wheel body 21, and the second bearing portion 2111 is used for abutting against the fourth matching portion 212 when the second matching portion 211 is matched with the fourth matching portion 212; specifically, the second bearing portion 2111 may be a bearing surface provided on the first wheel body 21, and the second bearing portion 2111 is further located outside the second matching portion.

In some embodiments, a third bearing portion 321 is disposed on the second annular cover 32, and the third bearing portion 321 is configured to abut against the first matching portion 221 when the first matching portion 221 and the third matching portion 222 are matched; specifically, the third bearing portion 321 may be a bearing surface disposed on the second annular cover 32, and the third bearing portion 321 is also located outside the third matching portion 222.

The second wheel body 31 is provided with a fourth bearing portion 311, and the fourth bearing portion 311 is used for abutting against the second matching portion 211 when the second matching portion 211 and the fourth matching portion 212 are matched. Specifically, the fourth bearing portion 311 may be a bearing surface disposed on the second wheel 31, and the fourth bearing portion 311 is further located inside the fourth matching portion 212.

This further improves the sealing performance between the first stator blade wheel 20 and the second stator blade wheel 30.

In addition, since the first fixed impeller 20 and the second fixed impeller 30 are both annular members, anti-rotation structures are required to be arranged on the first fixed impeller 20 and the second fixed impeller 30.

In a specific implementation, referring to fig. 14 and 15, one of the first fixed impeller 20 and the second fixed impeller 30 is provided with a positioning column 23, and the other is provided with a positioning groove 24 matched with the positioning column 23; for example, the first stator blade wheel 20 is provided with a stator column 23, and the second stator blade wheel 30 is provided with a stator slot 24.

When the first matching portion 221 is in contact fit with the third matching portion 222, and the second matching portion 211 is in contact fit with the fourth matching portion 212, the positioning column 23 is inserted into the positioning slot 24.

Here, the number of positioning columns 23 and positioning grooves 24 may be set in one set, for example, the positioning columns 23 and the positioning grooves 24 are provided at positions offset from each other with respect to the snap-fit portion 14 and the click portion 13.

In addition, referring to fig. 14 and 3, a radial outer side surface of the first annular cover 22 is provided with a snap structure 40, a position of the impeller cover 220 corresponding to the snap structure 40 is further provided with a snap structure 41, and the impeller cover 220 can be fixed on the fixed impeller assembly 100 by the cooperation of the snap structure 40 and the snap structure 41. Here, the number of the locking structures 41 and the locking protrusions 40 can be set in multiple groups according to actual needs, and the setting positions can be, for example, uniformly distributed in the circumferential direction of the cleaner motor 200.

In the embodiment of the present application, referring to fig. 14, 2, and 3, the fixed impeller assembly 100 further includes a baffle 50, and the baffle 50 is configured in an annular shape and is positioned radially inside the inner flow guiding ring 150. Thus, when moisture is present in the fluid passage 120 of the fixed impeller assembly 100, the moisture is blocked by the baffle 50 and does not enter the motor body 230.

In concrete implementation, the base 42 is provided at the upstream-side end surface of the first wheel 21, and the damper 50 may be attached to the base 42. In addition, a sealing ring can be arranged between the baffle 50 and the motor body 230 for better sealing isolation.

Fig. 16 is a schematic cross-sectional structural view of a combined blade in a fixed blade and blade wheel assembly provided in an embodiment of the present application.

In the present embodiment, referring to fig. 16, each of the composite blades 110 is configured to have an airfoil shape, the leading edge of the composite blade 110 is defined as a first leading edge 1101, and the trailing edge of the composite blade 110 is defined as a first trailing edge 1102, so that the first leading edge 1101 is located on the upstream side S in the airflow direction with respect to the first trailing edge 1102. Therefore, the noise on the pressure surface and the suction surface of the combined blade can be effectively reduced, and the noise of the separated flow is inhibited.

Fig. 17 is a schematic structural view of a vacuum cleaner according to an embodiment of the present disclosure. Referring to fig. 17, the present embodiment further provides a vacuum cleaner 300 including the vacuum cleaner motor 200 described above. It is understood that the structure, function, operation principle, etc. of the motor 200 of the cleaner have been described in detail, and thus, will not be described herein.

In a specific implementation, the vacuum cleaner 300 may include a main body 330, and a floor brush 310 and a dust cup 320 disposed on the main body 330, and the vacuum cleaner motor 200 is also disposed on the main body 330. Wherein, the floor brush 310 is used for cleaning the surface to be cleaned, and the floor brush 310, the dust cup 320 and the motor 200 of the dust collector are in fluid connection.

For example, dirt on the surface to be cleaned can enter the dirt cup 320 through the suction opening of the floor brush 310, and the fluid filtered in the dirt cup 320 enters the cleaner motor 200 through the air inlet side of the cleaner motor 200 and flows out of the room through the air outlet side of the cleaner motor 200.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (23)

1. A fixed impeller assembly, characterized by comprising a plurality of fixed impellers (10) arranged coaxially, each fixed impeller (10) comprising a wheel body (11) and a plurality of blades (12) provided along an outer surface of the wheel body (11) in a circumferential direction, each blade (12) comprising a root portion fixed to the wheel body (11), a tip portion spaced apart from the wheel body (11), a leading edge (121) extending between the root portion and the tip portion, and a trailing edge (122) extending between the root portion and the tip portion;

the blades (12) in each fixed impeller (10) are arranged in a one-to-one correspondence manner, in any two adjacent fixed impellers (10), the front edges (121) and the rear edges (122) of the two corresponding blades (12) are connected, so that the corresponding blades (12) in the fixed impellers (10) form a continuous combined blade (110);

in the projection of the fixed vane wheel assembly (100) on a first plane, the projections of two adjacent combined vanes (110) have an overlapping region (130), wherein the first plane is perpendicular to the axial direction of the fixed vane wheel assembly (100).

2. Stationary vane wheel assembly according to claim 1, characterized in that the leading edge (121) of each vane (12) is located in front of the trailing edge (122) in the circumferential direction of the wheel body (11);

the projections of two adjacent blades (12) of each fixed impeller (10) in a plane perpendicular to the axial direction of the fixed impeller assembly (100) do not overlap with each other.

3. The fixed impeller assembly according to claim 1, wherein any two adjacent fixed impellers (10) are provided with a clamping part (13) on one fixed impeller (10), and a clamping matching part (14) clamped with the clamping part (13) is provided on the other fixed impeller (10) so as to limit the movement of the two adjacent fixed impellers (10) relative to each other along the axial direction of the fixed impeller assembly.

4. Stationary vane wheel assembly according to claim 3, characterized in that the wheel body (11) is configured as a ring-shaped piece;

each fixed impeller (10) further comprises an annular cover (16) coaxially sleeved on the circumferential outer side of the impeller body (11), and the tops (124) of the blades (12) are connected to the annular cover (16);

the wheel bodies (11) of the fixed impellers (10) are connected with each other to form a flow guide inner ring (150), and the annular covers (16) of the fixed impellers (10) are connected with each other to form a flow guide outer ring (160);

the combined blades (110) are positioned between the flow guide inner ring (150) and the flow guide outer ring (160), and any two adjacent combined blades (110), the flow guide inner ring (150) and the flow guide outer ring (160) jointly define a fluid channel (120).

5. Stationary vane wheel assembly according to claim 4, characterized in that the annular shroud (16) of the stationary vane wheel (10), the wheel body (11) and the vanes (12) connected between the annular shroud (16) and the wheel body (11) are formed integrally.

6. A fixed impeller assembly according to claim 4 wherein each of the vanes has a thickness of 1mm to 5mm.

7. The fixed impeller assembly of claim 4, wherein, in any two adjacent fixed impellers (10), the clamping part (13) is arranged on the radial inner side surface of the impeller body (11) of one of the fixed impellers (10), and the clamping matching part (14) is arranged on the other fixed impeller (10) and extends to the radial inner side surface of the impeller body (11) of the fixed impeller (10) to be clamped with the clamping part (13).

8. Stationary impeller assembly according to claim 7, characterized in that the engaging portion (13) is configured as a hook, and the snap-fit portion (14) is provided with a snap groove (141) for the engaging portion (13) to be snapped in.

9. Stationary impeller assembly according to claim 4, characterized in that the number of stationary impellers (10) is two;

-defining said fixed impeller upstream in the direction of flow of the gas stream as a first fixed impeller (20), -defining said fixed impeller downstream in the direction of flow of the gas stream as a second fixed impeller (30), -defining said annular shroud of said first fixed impeller (20) as a first annular shroud (22), -defining said annular shroud of said second fixed impeller (30) as a second annular shroud (32); the wheel body defining the first fixed impeller (20) is a first wheel body (21), and the wheel body defining the second fixed impeller (30) is a second wheel body (31);

a first annular matching part (221) and a second annular matching part (211) which extend towards the second fixed impeller (30) and are annular are respectively arranged on the first annular cover (22) and the first wheel body (21), and a third matching part (222) and a fourth matching part (212) which extend towards the first fixed impeller (20) and are annular are respectively arranged on the second annular cover (32) and the second wheel body (31);

wherein the first mating portion (221) and the third mating portion (222) are in contact with each other; the second fitting portion (211) and the fourth fitting portion (212) are in contact with each other.

10. The fixed vane wheel assembly according to claim 9, wherein an inner side surface of the first engaging portion (221) in the radial direction of the fixed vane wheel assembly (100) is in abutting engagement with an outer side surface of the third engaging portion (222) in the radial direction of the fixed vane wheel assembly (100);

the outer side surface of the second matching part (211) along the radial direction of the fixed impeller component (100) is matched with the inner side surface of the fourth matching part (212) along the radial direction of the fixed impeller component (100) in an abutting mode.

11. The fixed impeller assembly according to claim 9, wherein an inner side surface of the first fitting portion (221) in the radial direction of the fixed impeller assembly (100), and an outer side surface of the third fitting portion (222) in the radial direction of the fixed impeller assembly (100) are configured as conical surfaces that match each other;

an outer side surface of the second fitting portion (211) in the radial direction of the fixed impeller assembly (100), and an inner side surface of the fourth fitting portion (212) in the radial direction of the fixed impeller assembly (100) are configured as conical surfaces that are fitted to each other;

an inner side surface of the first matching portion (221) along the radial direction of the fixed impeller assembly (100) is defined, and the distance between the inner side surface of the first matching portion (221) and an outer side surface of the second matching portion (211) along the radial direction of the fixed impeller assembly (100) is d;

the distance d gradually increases in the direction of the airflow.

12. Fixed impeller assembly according to claim 9, characterized in that the first annular cover (22) is provided with a first bearing portion (2211), the first bearing portion (2211) being intended to abut against the third fitting portion (222) when the first fitting portion (221) and the third fitting portion (222) are fitted;

a second bearing portion (2111) is arranged on the first wheel body (21), and the second bearing portion (2111) is used for abutting against the fourth matching portion (212) when the second matching portion (211) and the fourth matching portion (212) are matched; and/or

A third bearing part (321) is arranged on the second annular cover (32), and the third bearing part (321) is used for abutting against the first matching part (221) when the first matching part (221) and the third matching part (222) are matched;

a fourth bearing portion (311) is arranged on the second wheel body (31), and the fourth bearing portion (311) is used for abutting against the second matching portion (211) when the second matching portion (211) and the fourth matching portion (212) are matched.

13. The fixed impeller assembly as claimed in any one of claims 9 to 12, wherein one of the first fixed impeller (20) and the second fixed impeller (30) is provided with a positioning column (23), and the other is provided with a positioning groove (24) matched with the positioning column (23);

when the first matching part (221) and the third matching part (222) are in contact with each other, and the second matching part (211) and the fourth matching part (212) are in contact with each other, the positioning column (23) is inserted into the positioning groove (24).

14. Stationary vane assembly according to any of claims 9-12, characterized in that the radially outer side of the first annular shield (22) is provided with a snap-in structure (40).

15. The fixed impeller assembly as claimed in any one of claims 9 to 12, wherein a base body (42) is provided at an upstream side end face of the first impeller body (21);

the fixed impeller component (100) further comprises a baffle plate (50) arranged on the base body (42), and the baffle plate (50) is annular and is arranged on the radial inner side of the flow guide inner ring (150).

16. Stationary vane assembly according to any of claims 9-12, characterized in that at least one of the composite vanes (110) is provided with a flow perturbation structure (60) in the profile to stratify the pressure distribution of the fluid channel (120) at different positions in the flow direction of the air stream.

17. Stationary vane assembly according to claim 16, characterized in that the flow perturbation structure (60) is configured as a concave or convex structure formed on the profile of the combined vane (110);

and/or

The flow disturbing structure (60) is positioned at the junction position of two adjacent blades (12) forming the same combined blade (110).

18. The fixed impeller assembly according to claim 16, wherein a plurality of fixed impellers (10) are arranged in a staggered manner in the axial direction of the fixed impeller assembly (100) to form a stepped structure on the inner wall of the fluid passage (120), the stepped structure forming the spoiler structure (60).

19. -fixed vane wheel assembly according to any of claims 1 to 12, characterized in that each of said combined vanes (110) is configured in the shape of an airfoil, the leading edge of said combined vane (110) being defined as a first leading edge (1101), the trailing edge of said combined vane (110) being defined as a first trailing edge (1102); the first leading edge (1101) is upstream in the airflow direction relative to the first trailing edge (1102).

20. Stationary vane wheel assembly according to any of claims 1-12, characterized in that the thickness of all the vanes (12) in the stationary vane wheel assembly (100) is the same.

21. A vacuum cleaner motor, comprising a stationary impeller assembly (100) as claimed in any one of claims 1 to 20 and an impeller (210), wherein the impeller (210) is arranged coaxially with the stationary impeller assembly (100) and the impeller (210) is located upstream of the stationary impeller assembly (100) in an airflow direction.

22. The vacuum cleaner motor according to claim 21, wherein the vacuum cleaner motor (200) further comprises an impeller housing (220), the impeller housing (220) is connected to the fixed impeller assembly (100) and is housed on a side of the impeller (210) facing away from the fixed impeller assembly (100); and/or

The vacuum cleaner motor (200) further comprises a motor body (230), the motor body (230) is located on one side, away from the movable impeller (210), of the fixed impeller assembly (100), and an output shaft of the motor body (230) penetrates through the fixed impeller assembly (100) and is in transmission connection with the movable impeller (210).

23. A vacuum cleaner, characterized in that it comprises a vacuum cleaner motor (200) according to claim 21 or 22.

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