CN118517434B - High-efficient low noise material retrieves environmental protection fan - Google Patents
High-efficient low noise material retrieves environmental protection fan Download PDFInfo
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- CN118517434B CN118517434B CN202410968618.0A CN202410968618A CN118517434B CN 118517434 B CN118517434 B CN 118517434B CN 202410968618 A CN202410968618 A CN 202410968618A CN 118517434 B CN118517434 B CN 118517434B
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- 239000000463 material Substances 0.000 title claims abstract description 44
- 230000007613 environmental effect Effects 0.000 title claims description 5
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 238000009792 diffusion process Methods 0.000 claims description 46
- 238000000576 coating method Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000011056 performance test Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- -1 sawdust Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- 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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal 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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- 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
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials 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
- F04D29/26—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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
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- 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
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- 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
-
- 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
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- 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 fans, in particular to an efficient low-noise material recycling environment-friendly fan, wherein an impeller comprises a plurality of blades and a rear disc connected to the rear sides of the blades; the blades comprise high blades and low blades, the high blades and the low blades are all arranged on a shaft disc of the impeller in a straight line and at equal intervals, and the number of the high blades and the number of the low blades are equal to at least three; an axial gap exists between the current collector and the impeller, and the axis of the air inlet and the axis of the impeller are arranged in a non-collinear way. The high-efficiency low-noise material recovery environment-friendly fan provided by the invention has higher flow, full pressure, fan efficiency and lower fan pneumatic noise, and solves the problem that the material is blocked at the impeller.
Description
Technical Field
The invention relates to the technical field of fans, in particular to an environment-friendly fan for recycling high-efficiency low-noise materials.
Background
The material recovery environment-friendly fan is environment-friendly matched equipment widely applied to industries such as paper, wood, chemical raw materials and the like, is suitable for discharging air mixtures containing paper, wood dust, sawdust, wood dust, powdery or granular chemical raw materials, dust and the like, conveying the materials to a designated place or equipment, improving the working environment, improving the recovery rate and the regeneration rate of waste materials and waste resources, solving the problem of difficult treatment and recovery of waste resources, reducing manpower and places, and achieving the aim of energy-saving, environment-friendly and high-efficiency production. However, the existing environment-friendly fans for material recovery in the market have the problems of small flow pressure, low efficiency, large noise, easy blockage and abrasion of impellers, and are difficult to meet the requirements of society and users.
Therefore, it is necessary to design an environment-friendly fan for recycling high-efficiency low-noise materials, which has the advantages of large flow, high total pressure, wear resistance of impellers and difficult blockage.
Disclosure of Invention
The invention aims to provide an efficient low-noise environment-friendly material recovery fan, and aims to solve the problems of low flow pressure, low efficiency, large noise, easy blockage of impellers and abrasion of the environment-friendly material recovery fan in the prior art.
In order to achieve the aim, the invention provides a high-efficiency low-noise material recycling environment-friendly fan, which comprises a volute, an impeller arranged in the volute and a current collector fixedly connected with the volute, wherein the volute comprises a coaming, a front side plate and a rear side plate which are connected with the front side and the rear side of the coaming, the current collector is provided with an air inlet, two ends of the coaming, part of the front side plate and part of the rear side plate jointly enclose an air outlet, and the impeller comprises a plurality of blades and a rear disc connected with the rear side of the blades;
The blades comprise tall blades and short blades, the direction parallel to the shaft disc of the impeller is the height direction, the direction perpendicular to the shaft disc of the impeller is the length direction, the length of the tall blades is L11, the height is L5, the thickness of the blades is t1, the length of the short blades is L12, the height is L4, the thickness of the blades is t2, the L11 and the L12 are equal and are 280-290mm, and 1.34< L5: l4<1.43, t1 and t2 are equal and are each 7.5-8.5mm;
the high blades and the low blades are arranged on the shaft disc of the impeller in a straight line and uniformly spaced manner, each high blade and each low blade comprises a first side, an air outlet side and a second side which are sequentially connected, the first side is parallel to the second side, the first side is far away from the rear disc, the second side is connected with the rear disc, the first side is parallel to the rear disc and extends along the radial direction of the rear disc, the air outlet side is perpendicular to the rear disc, the outermost ends of the air outlet sides of the high blades and the low blades are co-rounded, the diameter phi 3 of the circle is 670-690mm, the outlet angles of the high blades and the low blades are equal and are 90 degrees, and the number of the high blades and the number of the low blades are equal and are at least three;
an axial gap exists between the current collector and the impeller, and the axis of the air inlet and the axis of the impeller are arranged in a non-collinear way.
Further, L11 and L12 are equal and all are 284 mm, t1 and t2 are equal and all are 8mm, and Φ3 is 680mm;
L5 is 180mm and L4 is 130mm;
The number of tall and short blades is three.
Further, the current collector comprises an air inlet flange, a linear part and a fixing plate, wherein the air inlet flange is in a circular shape, the fixing plate is circular, the linear part is connected to the inner periphery of the air inlet flange and extends into the volute, the air inlet flange and the linear part are enclosed to form an air inlet, and the current collector is fixedly connected with the volute through the fixing plate;
the straight line part comprises a first straight line section and a second straight line section which are arranged on two sides of the fixed plate, the first straight line section is positioned outside the volute, and the second straight line section stretches into the inner cavity of the volute;
the air inlet flange and the fixing plate are arranged in a non-common circle.
Further, the current collector is cut by a plane passing through the central axis of the current collector, on the section, the flange of the air inlet is vertical to the straight line part, the diameter phi 1 of the air inlet is 348-352mm, the diameter phi 2 of the fixed plate is 770-780mm, and the distance L1 between the circle center O6 of the flange of the air inlet and the circle center O5 of the fixed plate is 33-37mm;
the ratio of the length L2 of the first straight line segment to the length L3 of the second straight line segment is greater than 2.2.
Further, Φ1 was 350mm, Φ2 was 775mm, L1 was 35mm, L2 was 131mm, and L3 was 59mm.
Further, the molded line of the volute comprises a first diffusion section, a first circular arc section, a second circular arc section, a third circular arc section, a fourth circular arc section, a volute tongue section and a second diffusion section which are sequentially connected; when the circle center of the impeller is used as a coordinate origin O, a rectangular coordinate system is established, the first diffusion section is positioned in the second quadrant and parallel to the Y axis, the first diffusion section is parallel to the second diffusion section, the first circular arc section is tangential to the first diffusion section, the volute tongue section is tangential to the second diffusion section, the circle center O2 of the first circular arc section is (-32.25 mm,32.25 mm), the radius R5 is 570-574mm and the arc length is 895-901mm, the circle center O3 of the second circular arc section is (-32.25 mm ), the radius R4 is 505-509mm and the arc length is 794-799mm, the circle center O4 of the third circular arc section is (32.25 mm, -32.25 mm), the radius R3 is 441-445mm and the arc length is 693-698mm, the circle center O1 of the fourth circular arc section is (32.25 mm ), the radius R2 is 376-380mm and the arc length is 260-264mm.
Further, when the center of the impeller is used as an origin of coordinates O, a rectangular coordinate system is established, the first diffusion section is parallel to the second diffusion section when the first diffusion section is located in the second quadrant and parallel to the Y axis, the first circular arc section is tangent to the first diffusion section, the volute tongue section is tangent to the second diffusion section, the center of the circle O2 coordinate of the first circular arc section is (-32.25 mm,32.25 mm), the radius R5 is 572mm and the arc length is 898.1mm, the center of the circle O3 coordinate of the second circular arc section is (-32.25 mm ), the radius R4 is 507mm and the arc length is 796.8mm, the center of the circle O4 coordinate of the third circular arc section is (32.25 mm, -32.25 mm), the radius R3 is 443mm and the arc length is 695.5mm, the center of the circle O1 coordinate of the fourth circular arc section is (32.25 mm ), the radius R2 is 378mm and the arc length is 262.2mm.
Further, the included angle 2 between the fourth circular arc section and the second diffusion section is 49-52 degrees, the radius R1 of the volute tongue section is 14-16mm, the arc length is 33-35mm, the length L7 of the first diffusion section is 402-412mm, and the length L6 of the second diffusion section is 100-110mm;
The width L9 of the air outlet is 279-281mm, and the height L8 of the air outlet is 368-372mm;
The width L10 of the coaming is the same as the width L9 of the air outlet.
Further, the included angle 2 between the fourth circular arc section and the second diffusion section is 50.29 degrees, the radius R1 of the volute tongue section is 15mm, the arc length is 34mm, the length L7 of the first diffusion section is 407.7mm, and the length L6 of the second diffusion section is 105mm;
the width L9 of the air outlet is 280mm, and the height L8 of the air outlet is 370mm;
The distance of the axial gap between the current collector and the first side of the tall blade was 41mm and the distance of the axial gap between the current collector and the first side of the short blade was 91mm.
Further, the device also comprises a motor, the output end of the motor is connected with the impeller, the axis of the impeller is collinear with the axis of the fixed plate, the current collector, the impeller and the volute are made of wear-resistant steel plates, and the inside of the current collector, the impeller and the volute are coated with metal wear-resistant coatings.
The invention provides a high-efficiency low-noise material recycling environment-friendly fan which comprises:
(1) The impeller structure without the impeller front disc is adopted, so that the problem that materials are blocked on the impeller is solved;
(2) Through the design of combining the height of the high-pressure radial blades and arranging six blades at intervals, the purposes of improving the inlet blockage of the impeller and inhibiting the separation and backflow in the impeller flow passage are achieved by combining the non-collinear arrangement of the axis of the air inlet and the axis of the impeller in the form of the high-low split blades, and the pressure loss between the blades is optimized, so that the performance of the centrifugal fan is improved, the efficiency of the fan is improved, and the problems of large total pressure loss and small wind pressure of the eight-blade backward impeller commonly adopted by a conventional material recycling environment-friendly fan are avoided;
(3) The spiral case adopts an equilateral primitive molded line design, so that the smoothness of the air flow in the spiral case is ensured, the spiral case molded line is suitable for an impeller structure with high and low radial blades, the flow loss is reduced, the speed distribution of all flow mass points in the spiral case can be controlled, the optimal flow state in the fan is obtained, and the efficiency of fluid conveying is ensured;
(4) Adopt high strength wear-resisting material and inside all coating metal wear-resisting coating, improved wear resistance, shock resistance and the life of blade, can effectively promote the life of fan.
Drawings
FIG. 1 is a schematic side view of an environment-friendly fan for recycling high-efficiency low-noise materials;
FIG. 2 is a schematic top view of the efficient low noise material recovery environmental protection fan of the present invention;
FIG. 3 is a schematic illustration of the profile of the volute;
FIG. 4 is a schematic structural view of an impeller;
FIG. 5 is a side cross-sectional view of the impeller;
FIG. 6 is a schematic perspective view of an impeller;
Fig. 7 is a schematic view of the structure of a current collector;
fig. 8 is a side cross-sectional view of a current collector;
Fig. 9 is a schematic perspective view of a current collector;
fig. 10 is a schematic diagram of a three-dimensional structure of a current collector
FIG. 11 is a graph of performance of a comparative example;
FIG. 12 is a graph of performance of a test case.
Reference numerals illustrate:
The spiral case 1, the first diffusion section 11, the first circular arc section 12, the second circular arc section 13, the third circular arc section 14, the fourth circular arc section 15, the volute tongue section 16, the second diffusion section 17 and the air outlet 18;
impeller 2, tall blades 21, first side 211, air outlet side 212, short blades 22, rear disk 23;
The air inlet flange 31, the straight line part 32, the first straight line section 321, the second straight line section 322, the fixing plate 33, the air inlet 34 and the reinforcing rib 35;
And a motor 4.
Detailed Description
The present invention will be described in detail with reference to specific examples.
In the present invention, unless explicitly stated and limited otherwise, when terminology such as "disposed," "connected," or "connected" is intended to be interpreted broadly, such as, for example, a fixed connection, a removable connection, or an integral connection; may be directly connected or connected through one or more intermediaries. The specific meaning of the terms described above in the present invention can be understood by those skilled in the art according to the specific circumstances. The direction words appearing in the invention are used for better explaining the characteristics of the features and the relation among the features, and it is understood that when the arrangement direction of the invention is changed, the characteristics of the features and the directions of the relation among the features are correspondingly changed, so that the direction words do not form absolute limiting effect on the characteristics of the features and the relation among the features in space, and only play a role in relative limiting. And, the size data in the present invention is not limited to the present invention, and any reasonable scaling based on the size data of the present invention does not depart from the essence of the present invention.
As shown in fig. 1-12, the invention provides a high-efficiency low-noise material recycling environment-friendly fan, which comprises a volute 1, an impeller 2 arranged in the volute 1 and a current collector 3 fixedly connected with the volute 1, wherein the volute 1 comprises a coaming, a front side plate and a rear side plate which are connected with the front side and the rear side of the coaming, the current collector 3 is provided with an air inlet 34, two ends of the coaming, part of the front side plate and part of the rear side plate jointly enclose an air outlet 18, and the impeller 2 comprises a plurality of blades and a rear disc 23 connected with the rear side of the blades;
The blades include a tall blade 21 and a short blade 22, the direction parallel to the axis of the impeller 2 is the height direction, the direction perpendicular to the axis of the impeller 2 is the length direction, the length of the tall blade 21 is L11, the height is L5, the thickness of the blade is t1, the length of the short blade 22 is L12, the height is L4, the thickness of the blade is t2, L11 and L12 are equal and are 280-290mm,1.34< L5: l4<1.43, t1 and t2 are equal and are each 7.5-8.5mm;
The high blades 21 and the low blades 22 are arranged on the shaft disc of the impeller 2 in a straight line and uniformly spaced manner, each of the high blades 21 and the low blades 22 comprises a first side 211, an air outlet side 212 and a second side which are sequentially connected, the first side 211 is parallel to the second side, the first side 211 is a side far away from the rear disc 23, the second side is a side connected with the rear disc 23, the first side 211 is parallel to the rear disc 23 and extends along the radial direction of the rear disc 23, the air outlet side 212 is perpendicular to the rear disc 23, the outermost ends of the air outlet sides 212 of the high blades 21 and the low blades 22 are co-rounded, the diameter phi 3 of the circle is 670-690mm, the outlet angles of the high blades 21 and the low blades 22 are equal and are 90 DEG, and the number of the high blades 21 and the low blades 22 are equal and are at least three;
an axial gap exists between the collector 3 and the impeller 2, and the axis of the air inlet 34 is arranged non-collinearly with the axis of the impeller 4. Preferably, L11 and L12 are equal and are all 284 mm, t1 and t2 are equal and are all 8mm, and Φ3 is 680mm; l5 is 180mm and L4 is 130mm; the number of tall blades 21 and short blades 22 is three.
Through the technical scheme, the high-efficiency low-noise material recycling environment-friendly fan solves the problem that materials are blocked on the impeller 2 by adopting the impeller 2 structure without the impeller front disc; through the design of combining the height of the high-pressure radial blades and arranging six blades at intervals, the blocking of materials can be reduced in the form of high-low split blades, namely, the arrangement of the high blades 21 and the low blades 22 at intervals, the materials can be smoothly sent out of the fan in the rotating process of the blades, and compared with the arrangement that the wind inlet edges of the blades and the front disc form a certain included angle in the prior art, the material stacking caused by the fact that the materials are blocked at the included angle position can be effectively prevented; the axial line of the air inlet 34 and the axial line of the impeller 2 are combined to realize the purposes of improving the inlet blockage of the impeller 2 and inhibiting the internal separation and backflow of the runner of the impeller 2, optimizing the pressure loss between the blades, solving the problem that the air inlet is easy to block during material conveying, improving the efficiency of the fan, reducing the pneumatic noise of the fan, and avoiding the problems of large total pressure loss and small air pressure existing in the eight-blade backward impeller commonly adopted by the conventional material recovery environment-friendly fan.
In this embodiment, the current collector 3 includes an air inlet flange 31, a linear portion 32 and a fixing plate 33, the air inlet flange 31 is in a ring shape, the fixing plate 33 is circular, the linear portion 32 is connected to the inner periphery of the air inlet flange 31 and extends into the volute 1, the air inlet flange 31 and the linear portion 32 are enclosed to form an air inlet 34, and the current collector 3 is fixedly connected with the volute 1 through the fixing plate 33;
The straight line part 32 comprises a first straight line section 321 and a second straight line section 322 which are arranged at two sides of the fixed plate 33, the first straight line section 321 is positioned outside the volute 1, and the second straight line section 322 stretches into the inner cavity of the volute 1;
The air inlet flange 31 and the fixing plate 33 are arranged in a non-common circle. Preferably, the current collector 3 is provided with reinforcing ribs 35 to improve wind pressure resistance of the current collector 3 and to improve the service life of the current collector 3.
In the embodiment, the current collector 3 is cut by a plane passing through the central axis of the current collector 3, on the section, the air inlet flange 31 is perpendicular to the straight line part 32, the diameter phi 1 of the air inlet 34 is 348-352mm, the diameter phi 2 of the fixed plate 33 is 770-780mm, and the distance L1 between the circle center O6 of the air inlet flange 31 and the circle center O5 of the fixed plate 33 is 33-37mm; preferably, Φ1 is 350mm, Φ2 is 775mm, and L1 is 35mm;
the ratio of the length L2 of the first straight line segment 321 to the length L3 of the second straight line segment 322 is greater than 2.2. Preferably L2 is 129-133mm and L3 is 57.5-60.5mm; further preferably, L2 is 131mm and L3 is 59mm.
In this embodiment, the molded line of the volute 1 includes a first diffuser 11, a first arc segment 12, a second arc segment 13, a third arc segment 14, a fourth arc segment 15, a volute tongue segment 16, and a second diffuser 17 that are sequentially connected; when the center of the impeller 2 is used as an origin of coordinates O, a rectangular coordinate system is established, the first diffusion section 11 is positioned in the second quadrant and is parallel to the Y axis, the first diffusion section 11 and the second diffusion section 17 are parallel, the first circular arc section 12 is tangent to the first diffusion section 11, the volute tongue section 16 is tangent to the second diffusion section 17, the center of the circle O2 of the first circular arc section 12 is (-32.25 mm,32.25 mm), the radius R5 is 570-574mm and the arc length is 895-901mm, the center of the circle O3 of the second circular arc section 13 is (-32.25 mm ), the radius R4 is 505-509mm and the arc length is 794-799mm, the center of the circle O4 of the third circular arc section 14 is (32.25 mm, -32.25 mm), the radius R3 is 441-445mm and the arc length is 693-698mm, the center of the circle O1 of the fourth circular arc section 15 is (32.25 mm ), the radius R2 is 376-380mm and the length is 260-260 mm.
Preferably, when the center of the impeller 2 is used as the origin O of coordinates to establish a rectangular coordinate system, the first diffuser 11 is located in the second quadrant and parallel to the Y axis, the first diffuser 11 and the second diffuser 17 are parallel, the first arc 12 is tangential to the first diffuser 11, the volute tongue 16 is tangential to the second diffuser 17, the center O2 of the first arc 12 is (-32.25 mm,32.25 mm), the radius R5 is 572mm and the arc length is 898.1mm, the center O3 of the second arc 13 is (-32.25 mm ), the radius R4 is 507mm and the arc length is 796.8mm, the center O4 of the third arc 14 is (32.25 mm, -32.25 mm), the radius R3 is 443mm and the arc length is 695.5mm, the center O1 of the fourth arc 15 is (32.25 mm ), the radius R2 is 378mm and the arc length is 262.2mm.
In the embodiment, the included angle 2 between the fourth circular arc section 15 and the second diffusion section 17 is 49-52 degrees, the radius R1 of the volute tongue section 16 is 14-16mm, the arc length is 33-35mm, the length L7 of the first diffusion section 11 is 402-412mm, and the length L6 of the second diffusion section 17 is 100-110mm; preferably, the included angle ∈2 between the fourth circular arc section 15 and the second diffuser section 17 is 50.29 °, the radius R1 of the volute tongue section 16 is 15mm and the arc length is 34mm, the length L7 of the first diffuser section 11 is 407.7mm, and the length L6 of the second diffuser section 17 is 105mm;
The width L9 of the air outlet 18 is 279-281mm, and the height L8 of the air outlet 18 is 368-372mm; preferably, the width L9 of the air outlet 18 is 280mm, and the height L8 of the air outlet 18 is 370mm;
The width L10 of the shroud is the same as the width L9 of the air outlet 18.
In this embodiment, the distance of the axial gap between the current collector 3 and the first side 211 of the tall blade 21 is 41mm, and the distance of the axial gap between the current collector 3 and the first side 211 of the short blade 22 is 91mm.
Through the technical scheme, the spiral case 1 adopts the equilateral primitive molded line design, so that the smoothness of the air flow in the spiral case 1 is ensured, the molded line of the spiral case 1 is suitable for the impeller 2 structure with high and low radial blades, the flow loss is reduced, the speed distribution of all flow mass points in the spiral case can be controlled, the optimal flow state in the fan is obtained, and the efficiency of fluid conveying is ensured.
In this embodiment, the utility model also includes motor 4, and motor 4's output is connected with impeller 2, and the axis of impeller 2 and the axis collineation of fixed plate 33, current collector 3, impeller 2 and spiral case 1 all adopt wear-resisting steel plate material and inside all coating metal wear-resisting coating. Through adopting high strength wear-resisting material (preferably wear-resisting steel) and inside all coating metal wear-resisting coating, improved wear resistance, shock resistance and the life of blade, can effectively promote the life of fan.
For verification of this example, a material recovery environmental protection fan of model Y200L-2-30kW was used as a comparative example, with an impeller diameter of 670mm. Meanwhile, based on the preferred structural parameters provided by the embodiment, the high-efficiency low-noise material recovery environment-friendly fan is manufactured by taking the diameter of the impeller 2 (namely the diameter of the peripheral circle formed by the outermost ends of a plurality of blades) as 670mm as a test example. The comparative example and the test example were subjected to performance test, the test results were converted into test data under the test conditions of an atmospheric pressure of 101325Pa, an atmospheric temperature of 20 ℃, a fan rotation speed of 2550r/min, a medium density of 1.2 kg/m 3, the test data shown in Table 1 and the performance curve shown in FIG. 11 were obtained by the comparative example, the test data shown in Table 2 and the performance curve shown in FIG. 12 were obtained by the test example, the performance curve was in the form of a horizontal coordinate with a volume flow, qvsglGu in the performance curve was a volume flow, LAGu was a sound level, ηr was fan efficiency, prGu was impeller power, pFGu was full pressure, and psFGu was static pressure.
TABLE 1
TABLE 2
From the test data and performance curves, the comparative example was inferior to the test example in volume flow, full pressure, static pressure, fan efficiency and a sound level. For the comparative example, the overall performance trend is that with increased impeller power, increased volumetric flow, decreased both total and static pressure, increased A sound level, fan efficiency at a peak of 49.144% after increasing. For the test example, the overall performance trend is that the volumetric flow is improved, the total pressure and the static pressure are both reduced, and the A sound level is increased under the condition that the impeller power is improved; the fan efficiency also rises and then falls, but the highest point of the fan efficiency is 56.049 percent.
In contrast, the test cases can achieve the following preferable performances: the flow rate is 5647-11627m, the total pressure is 4836.8-5770.8Pa, and the fan efficiency is about 56%; the fan efficiency of the test example is generally about 7 percent higher than that of the comparative example, the full pressure is increased by about 31 percent, and the flow is increased by about 12 percent, and the sound level A of the test example is generally reduced by about 5dB compared with that of the comparative example. Compared with the prior art, the material recovery rate of the fan of the test example is improved by 25-35 percent.
In summary, the high-efficiency low-noise material recovery environment-friendly fan provided by the invention has higher flow, full pressure, fan efficiency and lower fan pneumatic noise, and solves the problem that the material is blocked on the impeller.
The above-described embodiments and features of the embodiments may be combined with each other without conflict.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides a high-efficient low noise material recovery environmental protection fan, includes the spiral case, sets up impeller and the current collector with spiral case fixed connection in the spiral case, the spiral case include the bounding wall and connect preceding curb plate and the posterior lateral plate in the front and back both sides of bounding wall, the current collector is provided with the air intake, the air outlet is enclosed jointly to the both ends of bounding wall, partial preceding curb plate and partial posterior lateral plate, the impeller includes multi-disc blade and connects the posterior disc at the rear side of multi-disc blade, its characterized in that:
The blades comprise tall blades and short blades, the direction parallel to the shaft disc of the impeller is the height direction, the direction perpendicular to the shaft disc of the impeller is the length direction, the length of the tall blades is L11, the height is L5, the thickness of the blades is t1, the length of the short blades is L12, the height is L4, the thickness of the blades is t2, the L11 and the L12 are equal and are 280-290mm, and 1.34< L5: l4<1.43, t1 and t2 are equal and are each 7.5-8.5mm;
the high blades and the low blades are arranged on the shaft disc of the impeller in a straight line and uniformly spaced manner, each high blade and each low blade comprises a first side, an air outlet side and a second side which are sequentially connected, the first side is parallel to the second side, the first side is far away from the rear disc, the second side is connected with the rear disc, the first side is parallel to the rear disc and extends along the radial direction of the rear disc, the air outlet side is perpendicular to the rear disc, the outermost ends of the air outlet sides of the high blades and the low blades are co-rounded, the diameter phi 3 of the circle is 670-690mm, the outlet angles of the high blades and the low blades are equal and are 90 degrees, and the number of the high blades and the number of the low blades are equal and are at least three;
An axial gap exists between the current collector and the impeller, and the axis of the air inlet and the axis of the impeller are arranged in a non-collinear way;
The current collector comprises an air inlet flange, a linear part and a fixing plate, wherein the air inlet flange is circular, the linear part is connected to the inner periphery of the air inlet flange and extends into the volute, the air inlet flange and the linear part are enclosed to form an air inlet, and the current collector is fixedly connected with the volute through the fixing plate;
the straight line part comprises a first straight line section and a second straight line section which are arranged on two sides of the fixed plate, the first straight line section is positioned outside the volute, and the second straight line section stretches into the inner cavity of the volute;
Air inlet flange and fixing the plates are arranged in a non-co-circle manner;
The method comprises the steps of intercepting a current collector by a plane passing through the central axis of the current collector, wherein on the section, an air inlet flange is vertical to a straight line part, the diameter phi 1 of an air inlet is 348-352mm, the diameter phi 2 of a fixed plate is 770-780mm, and the distance L1 between the circle center O6 of the air inlet flange and the circle center O5 of the fixed plate is 33-37mm;
the ratio of the length L2 of the first straight line segment to the length L3 of the second straight line segment is greater than 2.2;
The molded line of the volute comprises a first diffusion section, a first circular arc section, a second circular arc section, a third circular arc section, a fourth circular arc section, a volute tongue section and a second diffusion section which are sequentially connected; when the circle center of the impeller is used as a coordinate origin O, a rectangular coordinate system is established, the first diffusion section is positioned in the second quadrant and parallel to the Y axis, the first diffusion section is parallel to the second diffusion section, the first circular arc section is tangential to the first diffusion section, the volute tongue section is tangential to the second diffusion section, the circle center O2 of the first circular arc section is (-32.25 mm,32.25 mm), the radius R5 is 570-574mm and the arc length is 895-901mm, the circle center O3 of the second circular arc section is (-32.25 mm ), the radius R4 is 505-509mm and the arc length is 794-799mm, the circle center O4 of the third circular arc section is (32.25 mm, -32.25 mm), the radius R3 is 441-445mm and the arc length is 693-698mm, the circle center O1 of the fourth circular arc section is (32.25 mm ), the radius R2 is 376-380mm and the arc length is 260-264mm.
2. The efficient low-noise material recovery environment-friendly fan according to claim 1, wherein:
L11 and L12 are equal and are all 284 mm, t1 and t2 are equal and are all 8mm, and phi 3 is 680mm;
L5 is 180mm and L4 is 130mm;
The number of tall and short blades is three.
3. The efficient low-noise material recovery environment-friendly fan according to claim 1, wherein: phi 1 is 350mm, phi 2 is 775mm, L1 is 35mm, L2 is 131mm, and L3 is 59mm.
4. The efficient low-noise material recovery environment-friendly fan according to claim 1, wherein: when the circle center of the impeller is used as a coordinate origin O, a rectangular coordinate system is established, the first diffusion section is parallel to the second diffusion section when the first diffusion section is positioned in the second quadrant and parallel to the Y axis, the first circular arc section is tangent to the first diffusion section, the volute tongue section is tangent to the second diffusion section, the circle center O2 coordinate of the first circular arc section is (-32.25 mm,32.25 mm), the radius R5 is 572mm and the arc length is 898.1mm, the circle center O3 coordinate of the second circular arc section is (-32.25 mm ), the radius R4 is 507mm and the arc length is 796.8mm, the circle center O4 coordinate of the third circular arc section is (32.25 mm, -32.25 mm), the radius R3 is 443mm and the arc length is 695.5mm, the circle center O1 coordinate of the fourth circular arc section is (32.25 mm ), the radius R2 is 378mm and the arc length is 262.2mm.
5. The efficient low-noise material recovery environment-friendly fan according to claim 4, wherein:
The included angle 2 between the fourth circular arc section and the second diffusion section is 49-52 degrees, the radius R1 of the volute tongue section is 14-16mm, the arc length is 33-35mm, the length L7 of the first diffusion section is 402-412mm, and the length L6 of the second diffusion section is 100-110mm;
The width L9 of the air outlet is 279-281mm, and the height L8 of the air outlet is 368-372mm;
The width L10 of the coaming is the same as the width L9 of the air outlet.
6. The efficient low-noise material recovery environment-friendly fan according to claim 5, wherein:
the included angle 2 between the fourth circular arc section and the second diffusion section is 50.29 degrees, the radius R1 of the volute tongue section is 15mm, the arc length is 34mm, the length L7 of the first diffusion section is 407.7mm, and the length L6 of the second diffusion section is 105mm;
the width L9 of the air outlet is 280mm, and the height L8 of the air outlet is 370mm;
The distance of the axial gap between the current collector and the first side of the tall blade was 41mm and the distance of the axial gap between the current collector and the first side of the short blade was 91mm.
7. The efficient low-noise material recovery environment-friendly fan according to claim 1, wherein: the motor is also included, the output end of the motor is connected with the impeller, the axis of the impeller is collinear with the axis of the fixed plate, a current collector the impeller and the volute both adopt high-strength wear-resistant materials the material and the inner parts are coated with metal wear-resistant coatings.
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