CN114412837A - Diffuser, fan assembly with diffuser and dust collector - Google Patents
Diffuser, fan assembly with diffuser and dust collector Download PDFInfo
- Publication number
- CN114412837A CN114412837A CN202210082138.5A CN202210082138A CN114412837A CN 114412837 A CN114412837 A CN 114412837A CN 202210082138 A CN202210082138 A CN 202210082138A CN 114412837 A CN114412837 A CN 114412837A
- Authority
- CN
- China
- Prior art keywords
- diffuser
- edge
- circumferential
- blades
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000428 dust Substances 0.000 title abstract description 17
- 238000004891 communication Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 abstract description 17
- 238000009434 installation Methods 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of dust collectors, and particularly provides a diffuser, a fan assembly with the diffuser and a dust collector. The diffuser has a diffuser body and a plurality of diffuser blades, the diffuser body has a first surface and a second surface that faces away from the first surface. The diffuser blades are arranged on the circumferential outer wall of the diffuser body at intervals in the circumferential direction, the circumferential outer wall is provided with a first edge and a second edge opposite to the first edge, the diffuser blades are located between the first edge and the second edge, and the distance from the front edges of the diffuser blades to the first edge is equal to the distance from the rear edges of the diffuser blades to the second edge. The diffuser can reduce the loss of high-speed fluid entering the diffuser, thereby improving the efficiency of the whole machine, particularly remarkably reducing the influence of the nonuniformity of a flow field at the outlet of an impeller in a fan assembly of a dust collector on the diffuser, and remarkably improving the performance of the fan assembly.
Description
Technical Field
The invention relates to the technical field of dust collectors, in particular to a diffuser, a fan assembly with the diffuser and a dust collector.
Background
Diffusers are widely used in various industries, such as in aircraft engines, vacuum cleaners, and ventilation equipment. In a broad sense, a diffuser is any conduit that reduces the incoming flow velocity at its outlet, and functions as a means to increase the pressure of the fluid as it reduces its velocity. The diffuser of the existing dust collector has large loss in the process of diffusing fluid, and is easy to interfere with a movable impeller in a fan assembly in the dust collector to influence the flow guide efficiency of the impeller.
Disclosure of Invention
The invention aims to provide a diffuser, a fan assembly with the diffuser and a dust collector, and aims to solve the technical problems that in the prior art, the diffuser is large in loss and low in diffusion efficiency, and the flow guide efficiency of a movable impeller in the fan assembly in the dust collector is influenced.
In order to achieve the purpose, the invention adopts the technical scheme that:
in a first aspect, there is provided a diffuser comprising:
a diffuser body;
the diffuser comprises a diffuser body, a plurality of diffuser blades and a plurality of vanes, wherein the diffuser blades are circumferentially arranged on the circumferential outer wall of the diffuser body at intervals;
the circumferential outer wall has a first edge and a second edge facing away from the first edge; the diffuser vane is between the first edge and the second edge.
In some embodiments, the diffuser body has a first surface and a second surface facing away from the first surface, the diffuser body further comprising an outer ring having a first circumferential inner wall and a second circumferential outer wall; the diffuser blade is positioned between the circumferential outer wall and the outer ring, the distance from the front edge of the diffuser blade to the first edge is equal to the distance from the rear edge of the diffuser blade to the second edge, and the outer edge of the diffuser blade is fixedly connected with the first circumferential inner wall; the diffuser blade is surrounded by the outer ring for 360 degrees.
In some embodiments, the diffuser vane wrap angle is 30-45 °, the inlet setting angle is 10-25 °, and the outlet setting angle is 25-30 °.
In some embodiments, a shaft hole penetrating through the diffuser body is arranged between the first surface and the second surface, and a circular accommodating groove is arranged on the first surface, and the shaft hole is located at the position of the center of the circular accommodating groove.
In some embodiments, a circular mounting groove is provided on the second surface, the circular mounting groove being in communication with the axle bore.
In some embodiments, the number of diffuser blades is odd or even.
In some embodiments, the circular mounting groove is positioned at the center of the second surface; a plurality of grooves are uniformly formed in the second surface and are uniformly arranged on the periphery of the circular mounting groove.
In some embodiments, the circumferential flange of the outer race is provided with a circumferential groove, the circumferential groove being between the first surface and the second surface and adjacent to the first surface;
alternatively, the circumferential flange of the outer ring is provided with an external thread, the external thread being located between the first surface and the second surface and adjacent to the first surface.
In a second aspect, the present invention also provides a fan assembly, comprising:
a diffuser;
the movable impeller is provided with a through hole and a plurality of movable blades, and the movable blades are circumferentially arranged on the circumferential outer wall of the movable impeller around the through hole;
the moving blade has a leading edge and a trailing edge;
the motor comprises an output shaft connected with the movable impeller; the output shaft passes through the circular mounting groove and the axle center hole and is connected with the through hole of the movable impeller;
the output shaft is fixedly connected with a bearing, and the bearing can be fixedly arranged in the circular mounting groove;
the fan cover is provided with an air inlet and an inner surface facing the movable impeller and an outer surface back to the inner surface; the fan cover is sleeved outside the circumference of the diffuser and wraps the movable impeller and the diffuser, or the fan cover is buckled on a circumferential groove of the outer ring and wraps the movable impeller.
In a third aspect, the present invention provides a vacuum cleaner, comprising a fan assembly, wherein the fan assembly is the fan assembly of the present invention.
The diffuser provided by the invention has the beneficial effects that: the diffuser provided by the embodiment can reduce the loss of high-speed fluid entering the diffuser, thereby improving the efficiency of the whole machine. In addition, the diffuser can obviously reduce the influence of the nonuniformity of the flow field of the impeller outlet in the fan assembly of the dust collector on the diffuser, and the performance of the fan assembly is obviously improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic perspective view of a diffuser according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of another diffuser according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a diffuser applied to a fan assembly according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an exploded structure of a diffuser applied to a fan assembly according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an exploded view of another diffuser according to an embodiment of the present invention;
FIG. 6 is a schematic view of an exploded configuration of a diffuser for use in a fan assembly according to the embodiment of the present invention shown in FIG. 5;
fig. 7 is a schematic perspective view of an impeller in the fan assembly shown in fig. 6 according to the present invention.
Fig. 8 is a schematic perspective view of the fan housing of the fan assembly shown in fig. 6 according to the present invention.
Wherein, in the figures, the respective reference numerals:
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention 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 invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
Example 1:
referring to fig. 1, the present embodiment provides a diffuser, which includes a diffuser body 10 and a plurality of diffuser blades 20. A plurality of diffuser vanes 20 are circumferentially arranged at intervals on a circumferential outer wall 103 of the diffuser body 10. A flow passage is formed between the diffuser blade 20 and the diffuser blade 20. The diffuser body 10 and the diffuser blades 20 are integrally formed, specifically manufactured by die casting or injection molding. The number of diffuser blades 20 is odd or even. In some embodiments, the number of diffuser blades 20 may be set as desired, for example, may be 6, 7, 8, 9, 10, etc. The diffuser blades 20 may be selected from any one of forward curved blades, backward curved blades, radial blades, or airfoil blades, depending on the nature or condition of operation of the diffuser blades 20. Further, the diffuser body 10 can be made of plastic material or metal material according to different working mediums. Such as engineering plastics, cast aluminum, etc. Referring to fig. 1 and 2, the diffuser body 10 is of cylindrical configuration. Diffuser blade 20 has an inner edge, a leading edge 201, a trailing edge 202, and an outer edge 203. The diffuser body 10 has a height greater than that of the diffuser blades 20. In some embodiments, the diffuser vanes 20 may have a height that is less than or equal to the height of the diffuser body 10. The diffuser body 10 has a first surface 101 and a second surface 102 facing away from the first surface 101. The plurality of diffuser vanes 20 are circumferentially arranged on the circumferential outer wall 103 of the diffuser body 10 between the first surface 101 and the second surface 102 at intervals and in an inclined manner. Further, the distance between the leading edge 201 of the diffuser blade 20 and the first surface 101 is equal to the distance between the trailing edge 202 of the diffuser blade 20 and the second surface 102. Through the structural design, the technical problems that the diffuser loss is large, the diffusion efficiency is low, and the flow guide efficiency of the movable impeller in the fan assembly in the dust collector is influenced can be effectively solved. The diffuser can obviously reduce the influence of the nonuniformity of the flow field at the outlet of the impeller in the fan assembly of the dust collector on the diffuser, obviously improve the performance of the fan assembly, improve the isentropic efficiency by 2.35-4.25% under the design working condition and improve the total pressure ratio by at least 2.5%.
The inner edge of each diffuser vane 20 is fixedly connected to the circumferential outer wall 103. The circumferential outer wall 103 has a first edge 1031 and a second edge 1032 facing away from the first edge 1031. Further, the diffuser vane 20 is located on the circumferential outer wall 103 between the first edge 1031 and the second edge 1032.
In some embodiments, diffuser vanes 20 have a wrap angle of 30-45 °, an inlet setting angle of 10-25 °, and an outlet setting angle of 25-30 °. The wrap angle of diffuser blades 20 may be set as desired. For example, any one of 35 °, 38 °, 40 °, 45 °. In addition, the inlet installation angle of the diffuser blade 20 may be set as desired. For example, it may be 10 °, 18 °, 20 °, 23 °, or 25 °. The exit setting angle of diffuser vanes 20 may be set as desired. E.g., 26 °, 28 °, 29 °, etc. The diffuser body 10 has the advantages that the wrap angle of the diffuser blades 20 arranged on the circumferential outer wall 103 of the diffuser body 10 is 30-45 degrees, the inlet installation angle is 10-25 degrees, and the outlet installation angle is 25-30 degrees, so that the loss of fluid entering the diffuser body 10 can be obviously reduced, and the diffuser efficiency of the diffuser is improved. In addition, by adopting the structural design mode, the inosculation between the inlet fluid of the diffuser body 10 and the diffuser blades 20 is better, the phenomenon of fluid separation is not easy to occur, and the efficiency of the whole machine is improved.
In some embodiments, a hub hole 104 is provided through the diffuser body 10 between the first surface 101 and the second surface 102 of the diffuser body 10. A circular receiving groove 105 is provided on the first surface 101. The diameter of the circular receiving groove 105 is larger than the diameter of the axle hole 104 and the axle hole 104 is located at the center of the circular receiving groove 105.
In some embodiments, a circular mounting slot 106 and a connecting rod 107 are provided on the second surface 102. The connecting rod 107 is parallel to the axis of the axle hole 104 and the circular mounting groove 106. The connecting rod 107 is used for connecting the diffuser body 10 with a motor (not shown). The number of the connecting rods 107 can be set according to the requirement, and for example, the number can be 3, 4, 5, 6, and the like. The provision of the plurality of connection rods 107 can significantly improve the reliability of the connection between the diffuser body 10 and the motor (not shown in the drawings). The circular mounting groove 106 is in communication with the axial bore 104. The diameter of the circular mounting groove 106 is greater than the diameter of the spindle bore 104. The diameter of the circular receiving groove 105 is larger than that of the circular mounting groove 106. The axle hole 104 is located at the upper portion of the circular mounting groove 106 and near the first surface 101. One end of the connecting rod 107 is vertically and fixedly installed on the second surface 102 at the periphery of the circular installation groove 106. Alternatively, the second surface 102 is provided with a slot 108, and one end of the connecting rod 107 is fixedly inserted into the slot 108. In the present embodiment, the number of the connecting rods 107 is two. The two connecting rods 107 are parallel to each other and one end of the connecting rod 107 is fixedly mounted on the second surface 102. As another alternative, the number of the slots 108 is two, and the two connecting rods 107 are respectively fixedly and vertically fixedly inserted into the slots 108. The number of slots 108 is set according to the number of connection bars 107. The circular mounting groove 106 is located at the center of the second surface 102.
In some embodiments, a plurality of grooves 109 are uniformly disposed on the second surface 102, and the plurality of grooves 109 are uniformly disposed on the circumference of the circular mounting groove 106. In this embodiment, the number of the grooves 109 is 4. The shape of the recess 109 may be adjusted as desired to match the specific shape or area of the end face of the motor (not shown) to which it is attached.
Fig. 3 is a schematic perspective view of a diffuser applied to a fan assembly according to this embodiment. Fig. 4 is an exploded view of the diffuser of the embodiment shown in fig. 3 applied to a fan assembly. The fan assembly includes a diffuser including a diffuser body 10, a fan housing 40, an impeller 50, and a motor (not shown). The rotor blade 50 has a through hole 501 and a plurality of rotor blades 502. The wrap angle of the rotor blade 502 ranges from 120 degrees to 150 degrees, the inlet installation angle of the rotor blade 502 ranges from 20 degrees to 30 degrees, and the outlet installation angle of the rotor blade 502 ranges from 15 degrees to 40 degrees. In one or more embodiments, the number of moving blades 502 can be set as desired, and can be, for example, 6, 7, 8, 9, etc. A flow guide channel is formed between the moving blades 502 and the moving blades 502, and the width of the flow guide channel can be adjusted according to needs. In some embodiments, the width of the flow leader may be equal to the height of the rotor blade 502. In other embodiments, the width of the flow leader is greater than or less than the height of the rotor blade 502.
In some embodiments, the impeller 50 is generally conical in configuration. The moving impeller 50 having a conical structure can significantly increase the inflow rate at the tip of the moving impeller 50. The top of the impeller 50 has an axially projecting cylindrical boss 505. The through hole 501 penetrates through the cylindrical boss 505. A plurality of moving blades 502 are circumferentially arranged on the circumferential outer wall of the moving blade 50 around the through hole 501. The rotor blade 502 has a leading edge 503 and a trailing edge 504. In this embodiment, the leading edge 503 of the rotor blade 502 has a sloped structure. The inclined structure of the leading edge 503 increases the length of the leading edge of the moving blade 502, reduces the harmonic loss of the leading edge of the moving blade 502, and further reduces the load concentrated at the front end of the moving blade 50, thereby further reducing the loss and improving the efficiency of the moving blade 50.
The motor (not shown) includes an output shaft 70 connected to the movable impeller 50, and the output shaft 70 passes through the circular mounting groove 106 and the axial hole 104 to be connected with the through hole 501 of the movable impeller 50 so as to rotate in cooperation. An electric motor (not shown) drives the output shaft 70 to rotate and then the movable impeller 50 to rotate. The moving impeller 50 is rotatably placed on the circular receiving groove 105 through the output shaft 70. The bearing 701 is rotatably fixed to the middle portion of the output shaft 70. The number of bearings 701 is at least one. The bearing 701 is disposed in the circular mounting groove 106 of the diffuser body 10. Further, the number of the bearings 701 may be set as needed, and may be selected as one. When the number of the bearings 701 is plural, the plural bearings 701 are sequentially fitted to the output shaft 70. By providing a plurality of bearings 701, the load resistance and the service life of the impeller 50 can be significantly improved. The type of the bearing 701 may be set according to the need or working medium, and may be, for example, a ball bearing, a needle bearing, etc., and when the deep groove ball bearing has a large radial play, the deep groove ball bearing has the performance of an angular contact bearing and can bear a large axial load. In addition, the friction coefficient of the deep groove ball bearing is small, the limit rotating speed is high, and noise generated in the running process of the bearing roller can be obviously reduced.
The bearing 701 includes an outer ring and an inner ring, the inner ring is disposed in the outer ring, and a rolling body is filled between the inner ring and the outer ring to ensure that the inner ring and the outer ring can rotate relatively. In order to ensure that the output shaft 70 rotates relative to the outer ring in the rotating process, the outer ring of the bearing 701 is in interference fit with the circular mounting groove 106, at this time, the outer ring of the bearing 701 is relatively fixed with the diffuser body 10, and when the output shaft 70 rotates, the inner ring of the bearing 701 is driven to rotate relative to the outer ring of the bearing 701, and the movable impeller 50 is further driven to rotate.
The fan housing 40 has a circular structure and has an air inlet 401, and the diameter of the air inlet 401 is smaller than the opening diameter of the fan housing 40. Further, the diameter of the circumferential wall surface of the air inlet 401 of the hood 40 to the diameter of the circumferential wall surface of the opening end of the hood 40 is gradually increased. The cowl 40 also has an inner surface 402 facing the impeller 50 and an outer surface 403 facing away from the inner surface 402. The fan cover 40 is detachably disposed on the outer circumference of the diffuser body 10 and covers the impeller 50 and the diffuser body 10. Inner surface 402 is movable into abutment with outer edge 203. After entering the fan housing 40 through the inlet 401, the fluid is radially guided outward to the diffuser body 10 by the plurality of moving blades 502 of the moving impeller 50, and the fluid guided by the plurality of moving blades 502 decelerates the fluid by the plurality of diffuser blades 20 of the diffuser body 10 to increase the static pressure of the fluid.
Example 2:
the embodiment of the disclosure also provides a dust collector which comprises the fan assembly in the embodiment 1.
Example 3:
referring to fig. 5, the present embodiment provides a diffuser having a diffuser body 10 and a plurality of diffuser blades 20. A plurality of diffuser vanes 20 are circumferentially arranged at intervals on a circumferential outer wall 103 of the diffuser body 10. The diffuser body 10 and the plurality of diffuser blades 20 are of an integral structure. The inner edge of each diffuser vane 20 is fixedly connected to the circumferential outer wall 103. The circumferential outer wall 103 has a first edge 1031 and a second edge 1032 facing away from the first edge 1031. In the present embodiment, the diffuser vane 20 is on the circumferential outer wall 103 between the first and second edges 1031, 1032. Diffuser blade 20 also has a leading edge 201, a trailing edge 202, and an outer edge 203. The wrap angle of diffuser vanes 20 is 30-45 deg., preferably 35 deg.. The inlet setting angle is 10-25 degrees, preferably 25 degrees. The outlet mounting angle is 25-30 deg., preferably 18 deg.. In some embodiments, the number of diffuser blades 20 may be set as desired, for example, may be 6, 7, 8, 9, etc. The diffuser blades 20 may be selected as any one of forward curved blades, backward curved blades, radial blades, or airfoil blades, depending on the nature of operation or conditions. Further, the diffuser body 10 can be made of plastic material or metal material according to different working mediums. In some embodiments, the diffuser vanes 20 have a height that is less than the height of the diffuser body 10. The diffuser body 10 has a first surface 101 and a second surface 102 facing away from the first surface 101. In this embodiment, the diffuser body 10 further includes an outer ring 30. The height of the outer ring 30 is greater than the height of the diffuser body 10. The outer race 30 has a first circumferential inner wall 301 and a second circumferential outer wall 302 facing away from the first circumferential inner wall 301. The diffuser blades 20 are located between the circumferential outer wall 103 and the first circumferential inner wall 301 of the outer ring 30 and the outer edges 203 of the diffuser blades 20 are fixedly connected to the first circumferential inner wall 301. Outer band 30 may surround diffuser blades 20 through 360 °. Outer race 30 also has a first outer edge 303 and a second outer edge 304 facing away from first outer edge 303. The leading edge 201 of the diffuser blade 20 is axially lower than the first outer edge 303 and the trailing edge 202 of the diffuser blade 20 is axially higher than the second outer edge 304. In other words, the length of diffuser blades 20 is less than the height of outer band 30. The distance of the leading edge 201 of the diffuser blade 20 from the first outer edge 303 is equal to the distance of the trailing edge 202 of the diffuser blade 20 from the second outer edge 304. The diffuser adopting the structural design can obviously improve the diffusion efficiency of the diffuser.
The diffuser provided by the embodiment has the beneficial effects that: compared with the diffuser in embodiment 1, the diffuser with the outer ring 30 additionally arranged on the circumferential outer wall 103 of the diffuser body 10 has the advantages that the loss of fluid entering the diffuser body 10 can be reduced, the diffusion efficiency of the diffuser is improved, the influence of the nonuniformity of the flow field at the outlet of the impeller in the fan assembly of the dust collector on the diffuser is reduced, and the performance of the fan assembly can be improved. Further, due to the effect of the outer ring 30, the fluid entering between the diffuser blades 20 can be effectively rectified, and the diffuser diffusion and flow guide efficiency of the diffuser can be further improved. Compared with the diffuser in the embodiment 1, the isentropic efficiency is further improved by at least 1.35% under the design working condition, and the total pressure ratio is improved by at least 1.5%.
The diffuser body 10 has a disc-shaped structure. A hub hole 104 is provided through the diffuser body 10 between the first surface 101 and the second surface 102 of the diffuser body 10. A circular receiving groove 105 is provided on the first surface 101. The diameter of the circular receiving groove 105 is larger than the diameter of the axle hole 104 and the axle hole 104 is located at the center of the circular receiving groove 105. A circular mounting groove 106 and at least one connecting rod 107 are provided on the second surface 102. The connecting rod 107 is used for connecting the diffuser body 10 with a motor (not shown). The number of the connecting rods 107 can be set according to the requirement, and for example, the number can be 3, 4, 5, 6, and the like. The provision of the plurality of connection rods 107 can significantly improve the reliability of the connection between the diffuser body 10 and the motor (not shown in the drawings). The circular mounting groove 106 is in communication with the spindle bore 104 and the diameter of the circular mounting groove 106 is greater than the diameter of the spindle bore 104. The diameter of the circular receiving groove 105 is larger than that of the circular mounting groove 106. The axle hole 104 is located at the upper portion of the circular mounting groove 106 and is adjacent to the first surface 101, and the circular mounting groove 106 is adjacent to the second surface 102. One end of the connecting rod 107 is vertically and fixedly installed on the second surface 102 at the periphery of the circular installation groove 106. Alternatively, the second surface 102 is provided with a slot 108, and one end of the connecting rod 107 is fixedly inserted into the slot 108. In the present embodiment, the number of the connecting rods 107 is two. One ends of two connecting rods 107 are fixedly mounted on the second surface 102, respectively. As another alternative, the number of the slots 108 is two, and the two connecting rods 107 are respectively fixedly and vertically fixedly inserted into the slots 108. The number of slots 108 is set according to the number of connection bars 107. The circular mounting groove 106 is located at the center of the second surface 102. In some embodiments, a plurality of grooves 109 are uniformly disposed on the second surface 102, and the plurality of grooves 109 are uniformly disposed on the circumference of the circular mounting groove 106. The shape of the recess 109 may be adjusted as desired to match the particular shape of the end face of the motor (not shown) to which it is attached. In the present embodiment, the number of the grooves 109 is four and is uniformly distributed on the second surface 102. The four grooves 109 can significantly reduce the length of the fan assembly, reducing the volume of the fan assembly. Further, the connection firmness between the diffuser and the motor (not shown in the figure) can be ensured.
In this embodiment, different from embodiment 1, in order to facilitate the connection between the diffuser body 10 and the fan housing 40 of the fan assembly, a circumferential groove 305 is formed on the first outer edge 303 of the outer ring 30. A circumferential groove 305 is between the first surface 101 and the second surface 102 and is adjacent to the first surface 101. Alternatively, the outer rim 303 of the collar 30 is provided with an external thread between the first surface 101 and the second surface 102 and adjacent to the first surface 101. The circumferential groove 305 or the external thread is arranged, so that the connection reliability and the sealing performance between the diffuser body 10 and the fan cover 40 can be obviously improved, and the diffusion efficiency is further improved.
As shown in fig. 6, an explosion structure schematic diagram of the diffuser applied to the fan assembly according to the present embodiment is disclosed. The fan generally includes a diffuser body 10, a fan housing 40, an impeller 50, and a motor (not shown). The rotor blade 50 has a through hole 501 and a plurality of rotor blades 502, and the plurality of rotor blades 502 are arranged on the circumferential outer wall of the rotor blade 50 circumferentially around the through hole 501. The number of moving blades 502 can be adjusted as desired. For example, the number of moving blades 502 is 7, 9, or 11.
In some embodiments, as shown in FIG. 7, the impeller 50 has a cavity 506 with a conical configuration. A sleeve 507 is axially disposed within the cavity 506. The through hole 501 penetrates the loop bar 507. The movable impeller 50 is rotatably disposed on the circular receiving groove 105. The impeller 50 having a hollow structure can reduce the weight of the impeller 50. The rotor blade 502 has a leading edge 503 and a trailing edge 504. The leading edge 503 of the rotor blade 502 is a sloped structure. The inclined leading edge 503 can further reduce the loss and improve the efficiency of the movable impeller. Similarly, the angle of wrap of the rotor blade 502 is in the range of 120-150, preferably 150. The inlet stagger angle of the rotor blades 502 is 20-30 deg., preferably 28 deg.. The outlet setting angle of the rotor blade 502 is 15-40 deg., preferably 38 deg.. The wrap angle of the moving blade 502 is set to 150 degrees through calculation, the inlet installation angle is set to 28 degrees, and the outlet installation angle is 38 degrees, so that the efficiency of the moving blade 50 can be improved by 5-8%.
As shown in fig. 8, the hood 40 has an air inlet 401. The diameter of the air inlet 401 is smaller than the opening diameter of the hood 40. Further, the diameter of the circumferential wall surface of the air inlet 401 of the hood 40 to the diameter of the circumferential wall surface of the opening end of the hood 40 is gradually increased. The cowl 40 also has an inner surface 402 facing the impeller 50 and an outer surface 403 facing away from the inner surface 402. The inner surface 402 does not contact the outer edge of the rotor blade 502. In some embodiments, a circumferential groove 404 or internal threads are provided on the inner surface 402 at the opening of the hood 40. The fan housing 40 is sleeved on the circumferential groove 305 of the outer ring 30 through the circumferential slot 404 or the internal thread to wrap the movable impeller 50. The connection reliability between the fan cover 40 and the diffuser body 10 is improved through the connection mode, and the disassembly is convenient. In addition, the overall anti-seismic performance of the fan assembly can be obviously improved through the connection mode.
The motor (not shown) includes an output shaft 70 connected to the impeller 50. The output shaft 70 passes through the circular mounting groove 106 and the axle center hole 104 to be connected with a through hole 501 on the movable impeller 50. The bearing 701 is rotatably fixed to the middle portion of the output shaft 70. The bearing 701 is detachably disposed in the circular mounting groove 106 of the diffuser body 10. The bearing 701 includes an outer ring and an inner ring, the inner ring is disposed in the outer ring, and a rolling body is filled between the inner ring and the outer ring to ensure that the inner ring and the outer ring can rotate relatively. In order to ensure that the output shaft 70 rotates relative to the outer ring in the rotation process, the outer ring of the bearing 701 is in interference fit with the circular mounting groove 106, at this time, the outer ring of the bearing 701 is relatively fixed with the diffuser body 10, and when the output shaft 70 rotates, the inner ring of the bearing 701 is driven to rotate, and the movable impeller 50 is further driven to rotate. An electric motor (not shown) drives the output shaft 70 to rotate the impeller 50. After entering the fan housing 40 through the inlet 401, the fluid is radially guided outward into the diffuser body 10 by the plurality of moving blades 502 of the moving blade 50. The fluid guided by the plurality of moving blades 502 is decelerated by a flow passage between the plurality of diffuser blades 20 and the outer ring 30 of the diffuser body 10 to increase a static pressure of the fluid, and the decelerated and increased fluid is discharged through an outlet of the flow passage.
Example 4:
the embodiment of the disclosure also provides a dust collector which comprises the fan assembly in the embodiment 2.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A diffuser, comprising:
a diffuser body;
the diffuser comprises a diffuser body, a plurality of diffuser blades and a plurality of vanes, wherein the diffuser blades are circumferentially arranged on the circumferential outer wall of the diffuser body at intervals;
the circumferential outer wall has a first edge and a second edge facing away from the first edge, the diffuser vane being between the first edge and the second edge.
2. The diffuser of claim 1, wherein the diffuser body has a first surface and a second surface facing away from the first surface, the diffuser body further including an outer ring having a first circumferential inner wall and a second circumferential outer wall; the diffuser blade is located between the circumferential outer wall and the outer ring, and the distance from the front edge of the diffuser blade to the first edge is equal to the distance from the rear edge of the diffuser blade to the second edge.
3. The diffuser of claim 1 or 2, wherein the diffuser vanes have a wrap angle of 30-45 °, an inlet setting angle of 10-25 °, and an outlet setting angle of 25-30 °.
4. The diffuser of claim 2, wherein a central bore extending through the diffuser body is disposed between the first surface and the second surface, and a circular receiving groove is disposed in the first surface, the central bore being centered within the circular receiving groove.
5. A diffuser according to claim 2 or 4, wherein a circular mounting groove is provided on the second surface, the circular mounting groove being in communication with the axial bore.
6. The diffuser of claim 5 wherein the circular mounting slot is located at a center of the second surface.
7. The diffuser of claim 2 or 4, wherein the second surface is uniformly provided with a plurality of grooves, and the plurality of grooves are uniformly positioned on the circumference periphery of the circular mounting groove.
8. The diffuser of claim 2, wherein the circumferential flange of the outer ring has a circumferential groove disposed thereon, the circumferential groove being between the first surface and the second surface and proximate the first surface;
alternatively, the circumferential flange of the outer ring is provided with an external thread, which is located between the first surface and the second surface and close to the first surface.
9. A fan assembly, comprising:
the diffuser of any of claims 1 to 8;
a movable impeller having a through hole and a plurality of moving blades arranged on a circumferential outer wall of the movable impeller circumferentially around the through hole;
the moving blade has a leading edge and a trailing edge;
a motor including an output shaft connected to the impeller; the output shaft penetrates through the circular mounting groove and the axle center hole to be connected with the through hole of the movable impeller;
the output shaft is fixedly connected with a bearing, and the bearing can be fixedly arranged in the circular mounting groove;
the fan cover is provided with an air inlet, an inner surface facing the movable impeller and an outer surface facing away from the inner surface; the fan housing is sleeved outside the circumference of the diffuser and wraps the movable impeller and the diffuser, or the fan housing is buckled on the circumferential groove of the outer ring and wraps the movable impeller.
10. A vacuum cleaner comprising the fan assembly of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210082138.5A CN114412837A (en) | 2022-01-24 | 2022-01-24 | Diffuser, fan assembly with diffuser and dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210082138.5A CN114412837A (en) | 2022-01-24 | 2022-01-24 | Diffuser, fan assembly with diffuser and dust collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114412837A true CN114412837A (en) | 2022-04-29 |
Family
ID=81277371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210082138.5A Pending CN114412837A (en) | 2022-01-24 | 2022-01-24 | Diffuser, fan assembly with diffuser and dust collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114412837A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080193296A1 (en) * | 2007-02-12 | 2008-08-14 | Daido Castings Co., Ltd. | Turbine wheel of turbocharger |
| JP2013213442A (en) * | 2012-04-02 | 2013-10-17 | Honda Motor Co Ltd | Impeller and manufacturing method of the same |
| CN205136124U (en) * | 2015-11-12 | 2016-04-06 | 珠海格力电器股份有限公司 | Axial flow fan and axial flow fan blade thereof |
| CN206159110U (en) * | 2016-10-28 | 2017-05-10 | 广东威灵电机制造有限公司 | Mixed flow impeller, mixed flow fan and dust catcher |
| CN211398054U (en) * | 2020-01-06 | 2020-09-01 | 广东威灵电机制造有限公司 | Diffusion device, fan and dust catcher |
| CN212536246U (en) * | 2020-09-14 | 2021-02-12 | 北京石头世纪科技股份有限公司 | Fan and cleaning equipment |
| CN217462663U (en) * | 2022-01-24 | 2022-09-20 | 北京小狗吸尘器集团股份有限公司 | Diffuser, fan assembly with diffuser and dust collector |
-
2022
- 2022-01-24 CN CN202210082138.5A patent/CN114412837A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080193296A1 (en) * | 2007-02-12 | 2008-08-14 | Daido Castings Co., Ltd. | Turbine wheel of turbocharger |
| JP2013213442A (en) * | 2012-04-02 | 2013-10-17 | Honda Motor Co Ltd | Impeller and manufacturing method of the same |
| CN205136124U (en) * | 2015-11-12 | 2016-04-06 | 珠海格力电器股份有限公司 | Axial flow fan and axial flow fan blade thereof |
| CN206159110U (en) * | 2016-10-28 | 2017-05-10 | 广东威灵电机制造有限公司 | Mixed flow impeller, mixed flow fan and dust catcher |
| CN211398054U (en) * | 2020-01-06 | 2020-09-01 | 广东威灵电机制造有限公司 | Diffusion device, fan and dust catcher |
| CN212536246U (en) * | 2020-09-14 | 2021-02-12 | 北京石头世纪科技股份有限公司 | Fan and cleaning equipment |
| CN217462663U (en) * | 2022-01-24 | 2022-09-20 | 北京小狗吸尘器集团股份有限公司 | Diffuser, fan assembly with diffuser and dust collector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4395197A (en) | Centrifugal fluid machine | |
| CN217682449U (en) | Moving impeller, fan assembly with moving impeller and dust collector | |
| CN217462649U (en) | Impeller capable of reducing secondary flow on surface of moving blade, fan assembly and dust collector | |
| CN110513304B (en) | Centrifugal fan and dust collector | |
| CN114278576B (en) | Integrated impeller deposit prevention water pump | |
| JP5029024B2 (en) | Centrifugal compressor | |
| EP0602007B1 (en) | Vacuum cleaner having an impeller and diffuser | |
| CN217462663U (en) | Diffuser, fan assembly with diffuser and dust collector | |
| CN216842360U (en) | Impeller with inclined front edge moving blades, fan assembly and dust collector | |
| CN216812275U (en) | Impeller, fan assembly with impeller and dust collector | |
| CN114412831B (en) | Impeller, fan assembly with impeller and dust collector | |
| CN114321004A (en) | Impeller with inclined front edge moving blades, fan assembly and dust collector | |
| CN114658684A (en) | Moving impeller, fan assembly with moving impeller and dust collector | |
| CN114412837A (en) | Diffuser, fan assembly with diffuser and dust collector | |
| CN212177503U (en) | Axial flow fan with 0.5 hub ratio | |
| CN114412832A (en) | Impeller capable of reducing secondary flow on surface of moving blade, fan assembly and dust collector | |
| CN217152402U (en) | Multistage impeller structure and deep-well pump | |
| CN221723099U (en) | Backward centrifugal wind wheel with concave hole structure and centrifugal fan | |
| US4531887A (en) | Continuous blade multi-stage pump | |
| CN219509861U (en) | High-ventilation low-noise centrifugal ventilator | |
| JPS63183204A (en) | Stall prevention structure of axial flow rotary device | |
| CN212593499U (en) | Centrifugal blood pump | |
| CN215860960U (en) | Centrifugal fan impeller and centrifugal fan applying same | |
| CN220015580U (en) | Axial flow cooling fan | |
| CN221896826U (en) | Turbine fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |