CN113719473A - Low-noise fan assembled by special-shaped stator and rotor - Google Patents

Low-noise fan assembled by special-shaped stator and rotor Download PDF

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Publication number
CN113719473A
CN113719473A CN202111047550.5A CN202111047550A CN113719473A CN 113719473 A CN113719473 A CN 113719473A CN 202111047550 A CN202111047550 A CN 202111047550A CN 113719473 A CN113719473 A CN 113719473A
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CN
China
Prior art keywords
ring
blade
stator
special
rotor
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
Application number
CN202111047550.5A
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Chinese (zh)
Inventor
马宝发
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changchun Ri Yong Jea Gate Electric Co ltd
Shanghai Riyong Jea Gate Electric Co ltd
Shanghai Malu Ri Yong Jea Gate Electric Co ltd
Original Assignee
Changchun Ri Yong Jea Gate Electric Co ltd
Shanghai Riyong Jea Gate Electric Co ltd
Shanghai Malu Ri Yong Jea Gate Electric Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changchun Ri Yong Jea Gate Electric Co ltd, Shanghai Riyong Jea Gate Electric Co ltd, Shanghai Malu Ri Yong Jea Gate Electric Co ltd filed Critical Changchun Ri Yong Jea Gate Electric Co ltd
Priority to CN202111047550.5A priority Critical patent/CN113719473A/en
Publication of CN113719473A publication Critical patent/CN113719473A/en
Pending legal-status Critical Current

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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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially 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
    • F04D29/663—Sound attenuation
    • 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
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or 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 a low-noise fan assembled by a special-shaped stator and a rotor, which comprises a rotor, a stator and a rotating machine, wherein a supporting ring of the rotating machine is connected with an air protecting ring of an air cover in a spoke shape through special-shaped ribs; the geometric center of the wind shield wind protection ring is positioned on the rotating axis of the blade, so that the gravity center stacking line of the stator and the gravity center stacking line of the blade are on the same straight line; a housing of the rotary machine is fixed in a rotary machine support ring, and a rotary block of the rotary machine is fixed to the hub; the rotating block drives the vanes to direct the airflow in the direction of the stator. The invention has the beneficial effect that the noise intensity of the cooling fan in the motor vehicle is reduced by the special arrangement of the special-shaped stator and the special-shaped rotor.

Description

Low-noise fan assembled by special-shaped stator and rotor
Technical Field
The invention relates to a heat radiation fan structure for an automobile, in particular to a low-noise fan with an assembled special-shaped stator and a rotor.
Background
A radiator fan is indispensable in a vehicle radiator module. The heat radiation fan is composed of a rotor part and a stator part. The rotor is as the essential element that drives the air flow and do work, and prior art promotes radiator fan output performance through the optimal design rotor part generally, and the stator part generally plays the effect of support intensity and direction export air current, and whole noise intensity is uncontrollable.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and solve the problem that the noise intensity of a cooling fan in a motor vehicle is uncontrollable.
In order to achieve the above object, the invention provides a low noise fan with a special-shaped stator and a rotor, comprising a rotor, a stator and a rotating machine;
the rotor comprises a hub and a blade wind protection ring, and the hub and the blade wind protection ring are connected in a spoke shape through a plurality of blades;
the stator comprises an inner rotating machine support ring and an outer fan cover wind protection ring, and a rotating machine is fixed in the rotating machine support ring; the rotating machine support ring is connected with the fan cover wind protection ring in a spoke shape through special-shaped ribs; the geometric center of the wind shield wind protection ring is positioned on the rotating axis of the blade, so that the gravity center stacking line of the stator and the gravity center stacking line of the blade are on the same straight line;
a housing of the rotary machine is fixed in a rotary machine support ring, and a rotary block of the rotary machine is fixed to the hub; the rotating block drives the vanes to direct the airflow in the direction of the stator.
The rotating center of the blade is positioned in the hub, and the hub is fixedly connected with the rotating block on the output shaft of the rotating machine, so that the blade rotates around the output shaft of the rotating machine, and the blade directly applies work to the airflow.
Preferably, the hub extends in a direction of the stator to form a cylindrical circumferential wall, and the circumferential wall has a fin rib on an inner surface thereof, the fin rib generating an air flow in a direction of the rotor when rotating.
The hub referred to herein may be provided as a through-section in the inter-fin-gap region of the circumferential wall, allowing the air flow to pass directly. Of course, the penetrating part may not be provided, and the foreign matter prevention effect thereof is improved.
Preferably, the gap between the inside of the rotating machine support ring and the rotating machine is filled with a plurality of ribs extending in the radial direction.
Gaps for air flow to pass through are reserved among all the ribs.
Preferably, the ribs are distributed in an involute manner, and the involute direction of the ribs is opposite to the rotation direction of the rotor; the rotary machine support ring at the rib root is arc-shaped concave for guiding wind to the rotary machine.
Along the airflow flowing direction, a tapered annular flow passage is formed in the axial direction of the rotating machine support ring rib, the concave surface below the rib and the rotating machine stator.
Preferably, the blade wind guard ring is positioned in the fan cover wind guard ring, a convex ring radially extends outwards from one end of the blade wind guard ring axially far away from the special-shaped rib, and the inner side of the fan cover wind guard ring is in a stepped shape matched with the convex ring axially; a gap is reserved between the blade wind protection ring and the fan cover wind protection ring, and the projection of the convex ring of the blade wind protection ring and the step of the fan cover wind protection ring are overlapped in the radial direction.
The blade wind protection ring is matched with the fan cover wind protection ring at the blade top, and an annular groove is formed through a gap.
Preferably, the special-shaped rib is formed by stacking a plurality of wing profiles in the axial direction and the circumferential direction; the airfoil profile adopts a sweepback mode, is stacked along the axial flow direction of airflow, adopts the stacking mode which is the same as the circumferential direction of the trailing edge of the blade in the circumferential direction, and adopts the same gravity center stacking line equation from the blade root to the blade top as well as the blade; the special-shaped ribs are arranged in the circumferential direction of the support ring of the rotating machine centripetally according to different angles.
Preferably, the barycentric stacking line equation is: 156.2x3-329.1x2+54.67x，
Wherein x is a cross-sectional diameter (m), and y is a bending angle (°) of the cross-section.
Preferably, the number of the blades is odd, and the number of the ribs of the special-shaped ribs and the number of the blades are relatively prime numbers.
Preferably, the number of the ribs of the shaped rib is slightly larger than the number of the blades.
The blade cooperates special-shaped muscle, can realize the adjustment to the vorticity disturbance close to air-out cross-section department to reduce fan noise at the stator end.
The blades and the hub rotate at a high speed along with the rotating block, gas continuously flows into the hub, and the airflow passes through the rotating inner fin ribs, so that the speed of the airflow towards the direction of the rotor is increased, and the heat dissipation effect of the airflow on the rotating machine is enhanced.
The ribs are arranged to form gaps, so that the heat exchange area between the surface of the rotary machine and air flow and the air flow speed on the surface are increased, and the low-energy air flow at the position is fully utilized.
The supporting ring of the rotary machine is matched with the hub, a tapered annular flow channel can be formed in the axial direction, and the low-speed fluid close to the supporting ring of the rotary machine is accelerated, so that the heat dissipation effect of the supporting ring of the rotary machine is enhanced.
The rotor rotates at a high speed, the air flow speed at the position with the largest blade diameter is the largest, the corresponding air flow separation loss is also large, and the structure of the special ring groove can reduce the impact of secondary flowing air flow and the influx of the secondary flowing air flow into a main flow area, influence on the air flow effect and reduce the whole wind noise.
The special-shaped ribs of the stator are assembled at the blade outlet of the rotor, and meanwhile, the gravity stacking line of the stator is the same as that of the rotor blade. When the airflow passes through the special-shaped ribs, the disturbance of larger vorticity exists at the position close to the air outlet section, and the disturbance is smaller at the position close to the blades, so that the influence of the stator on the noise performance of the fan is weakened, and the total sound pressure level of the aerodynamic noise of the cooling fan is favorably reduced.
The blades are distributed in the circumferential direction of the hub in an unequal-distance mode, and the special-shaped ribs are distributed in the circumferential direction of the fan cover support ring in an unequal-angle mode, so that the discrete noise of the cooling fan is optimized.
The number of the ribs is set to be larger, the overall strength and the air quantity of the fan are comprehensively arranged, and the overall supporting strength of the fan is ensured.
The invention has the beneficial effect that the noise intensity of the cooling fan in the motor vehicle is reduced by the special arrangement of the special-shaped stator and the special-shaped rotor.
Drawings
FIG. 1 is a schematic view of an exploded assembly of a low noise fan with a profiled stator and rotor assembly according to the present invention;
FIG. 2 is a schematic front view of the rotor of the low noise fan with the profiled stator and rotor assembly of the present invention;
FIG. 3 is a schematic view of the hub of the low noise fan of the present invention with the profiled stator and rotor assembled;
FIG. 4 is a schematic front view of a stator of the low noise fan with a profiled stator and rotor assembly of the present invention;
FIG. 5 is a schematic view of a rotating machine support ring of the low noise fan with the profiled stator and rotor assembly of the present invention;
FIG. 6 is a schematic partial cross-sectional view of a gap between a blade wind-protecting ring and a wind-shield wind-protecting ring of the low-noise fan assembled by a special-shaped stator and a special-shaped rotor according to the present invention;
FIG. 7 is a schematic partial cross-sectional view of a rotating block and hub of the low noise fan with a profiled stator and rotor assembly according to the present invention;
FIG. 8 is a schematic partial cross-sectional view of a rotating machine support ring and rotating machine housing of the low noise fan with a profiled stator and rotor assembly of the present invention;
FIG. 9 is a comparative schematic view of 11 sections of a single blade and a single shaped rib of a profiled stator and rotor assembled low noise fan of the present invention;
wherein:
1-blade 11-hub 111-circumferential wall
112-wing rib 12-blade wind protection ring 121-convex ring
2-special-shaped rib 21-rotary machine support ring 211-rib
22-wind shield wind protection ring 221-step 3-rotary machine
Detailed Description
The invention is further described below with reference to the following figures and specific examples.
The low-noise fan assembled by the special-shaped stator and the rotor shown in fig. 1 to 9 comprises a rotor, a stator and a rotating machine, wherein the rotor comprises a hub 11 and a blade wind-protecting ring 12, and the hub 11 and the blade wind-protecting ring 12 are connected in a spoke shape through a plurality of blades 1; the stator comprises an inner rotating machine support ring 21 and an outer fan cover wind protection ring 22, and the motor type rotating machine 3 is fixed in the rotating machine support ring 21; the rotating machine support ring 21 and the fan cover wind protection ring 22 are connected in a spoke shape through special-shaped ribs 2; the geometric center of the wind shield wind-protecting ring 22 is positioned on the rotation axis of the blade 1, so that the gravity center stacking line of the stator and the gravity center stacking line of the blade 1 are on the same straight line; the housing of the rotary machine 3 is fixed in a rotary machine support ring 21, the rotary block of the rotary machine 3 is fixed to the hub 11; the rotating block drives the vanes 1 to direct the airflow in the stator direction.
The hub 11 extends from a cylindrical circumferential wall 111 toward a stator, a fin rib 112 is provided on an inner surface of the circumferential wall 111, and the fin rib 112 generates an air flow toward the rotor when rotating.
The gap between the inside of the rotary machine support ring 21 and the rotary machine 3 is filled with a plurality of ribs 211 extending in the radial direction.
The ribs 211 are distributed in an involute shape, and the involute direction is opposite to the rotation direction of the rotor; the rotary machine support ring 21 at the root of the rib 211 is arc-shaped and concave for guiding wind to the rotary machine 3.
The blade wind guard ring 12 is positioned in the fan cover wind guard ring 22, a convex ring 121 radially extends outwards from one end, which is far away from the special-shaped rib 2, of the blade wind guard ring 12 in the axial direction, and the inner side of the fan cover wind guard ring 22 is in a step 221 shape matched with the convex ring 121 in the axial direction; a gap is reserved between the blade air protecting ring 12 and the fan housing air protecting ring 22, and the convex ring 121 of the blade air protecting ring 12 and the step 221 of the fan housing air protecting ring 22 are projected and overlapped in the radial direction.
The special-shaped rib 2 is composed ofA plurality of airfoils are stacked in the axial direction and the circumferential direction; the airfoils are stacked in a sweepback mode along the axial flow direction of airflow, the stacking mode which is the same as that of the circumferential direction of the tail edge of the blade 1 is adopted in the circumferential direction, and the gravity center stacking line equation which is the same as that of the blade 1 is adopted from the blade root to the blade top; the special-shaped ribs 2 are arranged centripetally in the circumferential direction of the support ring 21 of the rotary machine according to different angles. The gravity integration line equation is: 156.2x3-329.1x2+54.67x，
Wherein x is a cross-sectional diameter (m), and y is a bending angle (°) of the cross-section.
The number of the blades 1 is odd, and the number of the special-shaped ribs 2 and the number of the blades are relatively prime numbers. The number of the special-shaped ribs 2 is slightly larger than that of the blades.
In describing this embodiment in more detail:
as shown in fig. 2, the rotor is composed of a hub 11, a plurality of blades 1 and a blade wind-guard ring 12. Wherein, the blades 1 have seven blades, and the included angles among the blades are 49 degrees, 52 degrees, 55 degrees, 47 degrees, 51 degrees, 55 degrees and 51 degrees. Sixteen fin ribs 112 are unevenly distributed on the hub 11 as shown in fig. 3. After the rotor is assembled with the rotating block of the motor (i.e. the rotating machine 3), the rotating block and the fin rib 112 in the hub 11 form a structure as shown in fig. 7, and the fin rib 112 and the rotor rotate together at a high speed, so that the heat dissipation effect of the airflow on the motor is enhanced.
As shown in fig. 4, the stator is composed of a plurality of special-shaped ribs 2, a rotating machine support ring 21 and a fan cover wind protection ring 22. Wherein, the number of the special-shaped ribs 2 is ten, and the included angle between the special-shaped ribs 2 is 34 degrees and 33.5 degrees. 32.7 °, 31.2 °, 30.3 °, 31.3 °, 32.4 °, 33.2 °, 34.4 °, 49.2 °, 34.8 °. A plurality of ribs 211 are arranged in the support ring 21 of the rotary machine in an involute counterclockwise direction as shown in fig. 5.
After the rotor and the stator are assembled, the wind shield wind protection ring 22 and the blade wind protection ring 12 have a certain distance in the axial direction and the radial direction of the fan, and an annular groove structure is formed at the blade top of the blade 1, as shown in fig. 6.
After the rotating machine support ring 21 is assembled with the motor housing, the rotating machine 3 and the rotating machine support ring 21 form a tapered annular flow passage in the axial direction, as shown in fig. 8.
The blades 1 and the special-shaped ribs 2 are in dynamic and static matching, and the same gravity-center stacking line equation is adopted. Eleven sections are evenly divided from the blade root to the blade top. As shown in fig. 9, the ratio of the chord length to the installation radius of eleven cross sections of the blade 1 is b 1-0.646, b 2-0.411, b 3-0.296, b 4-0.229, b 5-0.188, b 6-0.171, b 7-0.161, b 8-0.152, b 9-0.147, b 10-0.145, and b 11-0.142. The chord length and the installation radius d1 of eleven sections of the special-shaped rib 2 are 0.206, d2 is 0.103, d3 is 0.110, d4 is 0.09, d5 is 0.079, d6 is 0.076, d7 is 0.077, d8 is 0.080, d9 is 0.081, d10 is 0.0831, and d11 is 0.0749. As shown in fig. 9, the eleven cross sections of the blade 1 have an installation angle of a1 of 30 to 31 °, a2 of 26 to 27 °, a3 of 224 to 25 °, a4 of 21 to 22 °, a5 of 18 to 19 °, a6 of 19 to 20 °, a7 of 18 to 19 °, a8 of 18 to 19 °, a9 of 16 to 17 °, a10 of 18 to 19 °, and a11 of 19 to 20 °. The installation angle of eleven sections of the special-shaped rib 2 is c 1-43 degrees, c 2-43 degrees, c 3-43 degrees, c 4-45 degrees, c 5-45 degrees, c 6-46 degrees, c 7-43 degrees, c 8-39 degrees, c 9-34 degrees, c 10-31 degrees-33 degrees, and c 11-32 degrees-34 degrees.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is capable of numerous equivalents and substitutions, all of which are within the scope of the invention as defined by the appended claims.

Claims (8)

1. A low-noise fan with special-shaped stator and rotor assembly is composed of rotor, stator and rotary machine,
the rotor comprises a hub and a blade wind protection ring, and the hub and the blade wind protection ring are connected in a spoke shape through a plurality of blades;
the stator comprises an inner rotating machine support ring and an outer fan cover wind protection ring, and a rotating machine is fixed in the rotating machine support ring; the rotating machine support ring is connected with the fan cover wind protection ring in a spoke shape through special-shaped ribs; the geometric center of the wind shield wind protection ring is positioned on the rotating axis of the blade, so that the gravity center stacking line of the stator and the gravity center stacking line of the blade are on the same straight line; the special-shaped rib is formed by stacking a plurality of wing profiles in the axial direction and the circumferential direction; the airfoil profile adopts a sweepback mode, is stacked along the axial flow direction of airflow, adopts the stacking mode which is the same as the circumferential direction of the trailing edge of the blade in the circumferential direction, and adopts the same gravity center stacking line equation from the blade root to the blade top as well as the blade; the special-shaped ribs are arranged in the circumferential direction of the support ring of the rotating machine centripetally according to different angles.
A housing of the rotary machine is fixed in a rotary machine support ring, and a rotary block of the rotary machine is fixed to the hub; the rotating block drives the vanes to direct the airflow in the direction of the stator.
2. The low noise fan according to claim 1, wherein the hub projects in a stator direction from a cylindrical circumferential wall, and the circumferential wall is provided on an inner surface thereof with a fin rib that generates an air flow in a rotor direction when the fin rib rotates.
3. The low noise fan of claim 1, wherein a gap between the inside of the rotating machine support ring and the rotating machine is filled with a plurality of ribs extending in a radial direction.
4. The low noise fan in accordance with claim 3, wherein the ribs are arranged in an involute shape, and the involute direction is opposite to the rotation direction of the rotor; the rotary machine support ring at the rib root is arc-shaped concave for guiding wind to the rotary machine.
5. The low noise fan according to claim 1, wherein the blade shroud ring is located inside the fan housing shroud ring, a convex ring extends radially outwards from one end of the blade shroud ring axially away from the profiled rib, and the inner side of the fan housing shroud ring is in a stepped shape axially matching the convex ring; a gap is reserved between the blade wind protection ring and the fan cover wind protection ring, and the projection of the convex ring of the blade wind protection ring and the step of the fan cover wind protection ring are overlapped in the radial direction.
6. A low noise fan according to claim 1, wherein the barycentric stacking line equation is: 156.2x3-329.1x2+54.67x，
Wherein x is a cross-sectional diameter (m), and y is a bending angle (°) of the cross-section.
7. The low noise fan according to claim 1, wherein the number of the blades is an odd number, and the number of the ribs of the irregular rib and the number of the blades are mutually prime numbers.
8. The low noise fan of claim 7, wherein the ribs of the shaped ribs are slightly larger than the number of the blades.
CN202111047550.5A 2021-09-08 2021-09-08 Low-noise fan assembled by special-shaped stator and rotor Pending CN113719473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111047550.5A CN113719473A (en) 2021-09-08 2021-09-08 Low-noise fan assembled by special-shaped stator and rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111047550.5A CN113719473A (en) 2021-09-08 2021-09-08 Low-noise fan assembled by special-shaped stator and rotor

Publications (1)

Publication Number Publication Date
CN113719473A true CN113719473A (en) 2021-11-30

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CN202111047550.5A Pending CN113719473A (en) 2021-09-08 2021-09-08 Low-noise fan assembled by special-shaped stator and rotor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116871255A (en) * 2023-09-07 2023-10-13 沧州隆泰迪管道科技有限公司 Reducing type mechanical composite pipe machining production line and production method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116871255A (en) * 2023-09-07 2023-10-13 沧州隆泰迪管道科技有限公司 Reducing type mechanical composite pipe machining production line and production method
CN116871255B (en) * 2023-09-07 2023-12-12 沧州隆泰迪管道科技有限公司 Reducing type mechanical composite pipe machining production line and production method

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