CN115758629B - Special high-speed centrifugal fan for sweeping robot and design method and device thereof - Google Patents
Special high-speed centrifugal fan for sweeping robot and design method and device thereof Download PDFInfo
- Publication number
- CN115758629B CN115758629B CN202310034093.9A CN202310034093A CN115758629B CN 115758629 B CN115758629 B CN 115758629B CN 202310034093 A CN202310034093 A CN 202310034093A CN 115758629 B CN115758629 B CN 115758629B
- Authority
- CN
- China
- Prior art keywords
- line
- impeller
- dimensional
- centrifugal fan
- leaf
- 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.)
- Active
Links
- 238000010408 sweeping Methods 0.000 title claims abstract description 68
- 238000013461 design Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 57
- 230000003068 static effect Effects 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000009466 transformation Effects 0.000 claims description 9
- 101100056029 Staphylococcus aureus (strain NCTC 8325 / PS 47) arcC2 gene Proteins 0.000 claims description 3
- 101150089779 arcC gene Proteins 0.000 claims description 3
- 101150089858 arcC1 gene Proteins 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002245 particle Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000012938 design process Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 238000011960 computer-aided design Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241001417527 Pempheridae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of centrifugal fans, in particular to a special high-speed centrifugal fan for a sweeping robot and a design method and a device thereof. A design method of a special high-speed centrifugal fan for a sweeping robot comprises the following steps: step a1, determining the radius of an impeller inlet according to the installation size of the high-speed centrifugal fanR 1 Radius of impellerR 3 And blade widthBDetermining hub radius based on a given motor sizeR 2 The method comprises the steps of carrying out a first treatment on the surface of the Step a2, according to the inlet radius of the impellerR 1 Radius of impellerR 3 And blade widthBAnd respectively controlling the shell molded line and the hub molded line of the impeller by a four-point control method. The design method of the high-speed centrifugal fan special for the sweeping robot has the advantages of high efficiency, high static pressure, low noise and high vacuum degree, is applied to the sweeping robot, has a good dust collection effect, and solves the problems of low efficiency, high noise and low vacuum degree of the high-speed centrifugal fan in the existing sweeping robot.
Description
Technical Field
The invention relates to the technical field of centrifugal fans, in particular to a special high-speed centrifugal fan for a sweeping robot and a design method and a device thereof.
Background
Along with the improvement of living standard, the sweeping robot has the advantages of simple operation and convenient use, more and more consumers select the sweeping robot, and the sweeping robot enters the life of people and is connected with families and offices, so that the sweeping robot becomes an important member in small household appliances and is popular. In the robot for sweeping floor, the main function is the high-speed centrifugal fan inside the robot for sweeping floor, and along with the great improvement of the living standard and health consciousness of people, how the high-speed centrifugal fan operates efficiently, stably and quietly in the robot for sweeping floor is a key problem in product design and engineering optimization.
In the impeller design of the traditional centrifugal fan of the sweeping robot, a certain height is usually axially stretched according to a designed two-dimensional blade profile, but the inside of the centrifugal fan is complicated three-dimensional flow, so that the molded line of the impeller is a complicated three-dimensional space curve. Therefore, most of the centrifugal fans of the sweeping robot adopt an original design method, and have the advantages of low efficiency, high noise and small vacuum degree. The energy consumption is large in the operation process, the surrounding environment is influenced, the energy is wasted greatly, and the sustainable development is not facilitated.
Disclosure of Invention
Aiming at the problems of the background technology, the invention aims to provide a design method of a special high-speed centrifugal fan for a sweeping robot, and the designed high-speed centrifugal fan has the advantages of high efficiency, high static pressure, low noise and high vacuum degree, has good dust collection effect when being applied to the sweeping robot, and solves the problems of low efficiency, high noise and low vacuum degree of the high-speed centrifugal fan in the existing sweeping robot.
The invention further aims to provide the design device for executing the design method of the high-speed centrifugal fan special for the sweeping robot, wherein parameter optimization can be performed according to specific working conditions in the design process, and the whole design process adopts computer-aided design, so that manual errors are reduced, design efficiency is improved, and parameter adjustment is conveniently achieved.
The invention also aims to provide the high-speed centrifugal fan designed by the design method for realizing the special high-speed centrifugal fan for the sweeping robot, which has the advantages of high efficiency, high static pressure, low noise and high vacuum degree, and is applied to the sweeping robot, and the sweeping robot has good dust collection effect.
To achieve the purpose, the invention adopts the following technical scheme:
a design method of a special high-speed centrifugal fan for a sweeping robot comprises the following steps:
step a1, determining the radius of an impeller inlet according to the installation size of the high-speed centrifugal fanR 1 Radius of impellerR 3 And blade widthBDetermining hub radius based on a given motor sizeR 2 ；
Step a2, according to the inlet radius of the impellerR 1 Radius of impellerR 3 And blade widthBThe shell molded line and the hub molded line of the impeller are respectively controlled by a four-point control method so as to draw molded lines of the shell and the hub of the impeller on meridian flow surfaces;
step a3, cutting a plurality of blade high sections between a shell molded line and a hub molded line of the impeller;
step a4, converting the cut three-dimensional leaf high sections into two-dimensional planes through angle-preserving transformation, and converting the coordinate system into a three-dimensional coordinate system
Conversion to two dimensions->
A flow surface coordinate system; />
Step a5, at
Under the flow surface coordinate system, independently designing leaf shapes on two-dimensional planes corresponding to each leaf height;
step a6, passing each designed leaf pattern through two dimensions
The coordinates of the flow surface are converted into three-dimensional Cartesian coordinates, namely three-dimensional leaf shapes at different leaf heights, and the maximum wrap angle is set according to +.>
Is a square of (2)Placing in a formula to obtain a three-dimensional leaf profile;
step a7, combining the designed three-dimensional blade profile with a shell molded line and a hub molded line of the impeller to obtain the impeller;
and a8, carrying out matching design on the spiral casing according to a flow field in a spiral involute mode according to the designed impeller to obtain the spiral casing.
In step a2, the meridian flow surface profile is formed by a shell profile and a hub profile on the z-r plane, wherein the shell profile and the hub profile are controlled by three-time B spline curves of two four control points respectively;
the control points of the shell molded lines are respectivelyA 1 、A 2 、A 3 AndA 4 wherein the line segmentA 1 A 2 Keep level, line segmentA 3 A 4 Keep vertical, trace lineA 1 A 2 Length of (2)L 1 Line segmentA 3 A 4 Length of (2)L 2 ；
The control points of the hub molded lines are respectivelyA 5 、A 6 、A 7 AndA 8 wherein the line segmentA 5 A 6 Keep level, line segmentA 7 A 8 Keep vertical, trace lineA 5 A 6 Length of (2)L 3 Line segmentA 7 A 8 Length of (2)L 4 ；
Wherein the control pointA 1 And control pointA 5 Is the same as the abscissa of the control pointA 4 And control pointA 8 Is the same as the ordinate of (c);
control pointA 1 Is the longitudinal coordinate value of (2)R 1 Value of (2), control pointA 5 Is the longitudinal coordinate value of (2)R 2 Value of (2), control pointA 4 Control pointA 8 Is the longitudinal coordinate value of (2)R 3 Value of (2), control pointA 4 And control pointA 8 The difference between the abscissa of (2) and the abscissa of (2) is the width of the bladeB；
L 1 The range of (2) is 0.3%R 1 -R 2 )~0.6(R 1 -R 2 )，L 2 Is in the range of 0.9B to 1.1B，L 3 The range of (2) is 1.2%R 1 -R 2 )~1.4(R 1 -R 2 )，L 4 The range of (2) is 1.2B-1.4B.
Further, in the step a3, 1-15 blade high sections are taken between the shell molded line and the hub molded line by adopting an interpolation method.
Further, in the step a3, interpolation is adopted to construct leaf height sections of 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% respectively according to a 10% height gradient between the shell molded line and the hub molded line.
Further, in the step a4, a two-dimensional leaf pattern is defined as
Under the flow surface coordinate system, < >>
The flow surface coordinate system is obtained by three-dimensional cylindrical coordinate system through angle-preserving transformation:
wherein ,zis thatzThe coordinate value of the axial direction,rfor the coordinate value of the radial direction, definemFor the length of the meridian,m’is a dimensionless meridian length;
for leaf-type discrete points in a three-dimensional Cartesian coordinate system, two-dimensional integration is obtained through the following trapezoidal rule
Flow surface coordinates:
wherein ,θis a circumference angle, an angle markiIs the sequence number of discrete points, andzthe plane perpendicular to the axis beingxoyA plane surface of the glass fiber reinforced plastic plate,xis thatxoyPlanar surfacexThe coordinate value of the direction,yis thatxoyPlanar surfaceyThe coordinate value of the direction,zis thatzThe coordinate value of the axial direction,ris the coordinate value of the radial direction, wherein
。
Further, in the step a5, the blade profile is formed by the leading edgeP 1 S 1 Trailing edgeP 4 S 4 Curve of suction surfaceS 1 S 2 S 3 S 4 Curve of pressure surfaceP 1 P 2 P 3 P 4 Four sections of curves, wherein the suction surface curve and the pressure surface curve are 3 times B spline curves with four control points, the leading edge and the trailing edge are respectively circular arcs,P 1 、P 2 、P 3 andP 4 are all control points of the pressure surface curve,S 1 、S 2 、S 3 andS 4 control points of the suction surface curves;
wherein, the line segmentP 1 P 2 And line segmentS 1 S 2 Parallel, line segmentP 2 P 3 And line segmentS 2 S 3 Parallel, line segmentP 3 P 4 And line segmentS 3 S 4 Parallel to each other;
definition of the definitionβ 1 For the inlet air flow angle,β 1 is a line segmentS 1 S 2 And line segmentS 1 S 4 The included angle of (2) is less than or equal to 25 degreesβ 1 ≤45°；
Definition of the definitionβ 2 As the angle of the outlet air flow,β 2 is a line segmentS 3 S 4 And line segmentS 1 S 4 The included angle of (2) is less than or equal to 25 degreesβ 2 ≤45°；
Definition of the definitionS 1 And (3) withP 1 Distance of (2)R l And line segmentS 1 S 4 Is the leading edge coefficientχ l ，0.01≤χ l ≤0.04；
Definition of the definitionS 4 And (3) withP 4 Distance of (2)R t And line segmentS 1 S 4 Is the trailing edge coefficientχ t ，0.005≤χ t ≤0.02；
Define a suction surface curve distance line segmentS 1 S 4 Maximum value of (2) is the camber
，0.05≤/>
≤0.2。
Further, in the step a6
Under the flow surface coordinate system, < >>
Abscissa of flow surface coordinate systemθIs expressed in radian, the two-dimensional leaf profile is placed, and the maximum wrap angle is defined>
Two dimensions +.>
The coordinates of the flow surface are converted into three-dimensional Cartesian coordinates, three-dimensional leaf shapes at different leaf heights are obtained, and the three-dimensional leaf shapes are obtained through boundary mixing.
Further to the description, in the step a8, the molded line of the volute is an involute, and the molded line of the volute is formed by five arc lines connected in sequenceC 1 、C 2 、C 3 、C 4 、C 5 And a section of straight lineD 1 Composition, straight lineD 1 Connected to an arcC 5 Is a terminal end of (2);
G 1 to the point ofG 2 The arc line between them is an arc lineC 1 Arc lineC 1 The corresponding circle center isO 1 ，O 1 Is the center of a circle of the impeller, an arc lineC 1 Corresponding radius isE 1 ；
G 2 To the point ofG 3 The arc line between them is an arc lineC 2 Arc lineC 2 The corresponding circle center isO 2 Arc lineC 2 Corresponding radius isE 2 ；
G 3 To the point ofG 4 The arc line between them is an arc lineC 3 Arc lineC 3 The corresponding circle center isO 3 Arc lineC 3 Corresponding radius isE 3 ；
G 4 To the point ofG 5 The arc line between them is an arc lineC 4 Arc lineC 4 The corresponding circle center isO 4 Arc lineC 4 Corresponding radius isE 4 ；
G 5 To the point ofG 6 The arc line between them is an arc lineC 5 Arc lineC 5 The corresponding circle center isO 5 Arc lineC 5 Corresponding radius isE 5 ；
For the center of circleO 1 Included angle of (2): angle of jointG 1 O 1 G 2 =85°～95°，∠G 2 O 1 G 3 =20°～30°，∠G 3 O 1 G 4 =90°，∠G 4 O 1 G 5 =90°, straight lineD 1 Included angle with vertical lineH8-15 degrees;
E 1 =32mm～35mm，E 2 =32mm～35mm，E 3 =34mm～37mm，E 4 =36mm～39mm， E 5 21 mm-23 mm, and center of circleO 2 Center of circleO 3 And center of a circleO 4 Form an isoscelesA right-angled triangle shape, wherein the right-angled triangle shape,O 2 O 3 =O 3 O 4 =2mm。
the design device of the special high-speed centrifugal fan of the sweeping robot is used for executing the design method of the special high-speed centrifugal fan of the sweeping robot, and comprises the following steps:
the molded line drawing module is used for drawing a molded line according to the radius of an inlet of the impellerR 1 Radius of impellerR 3 And blade widthBRespectively controlling a shell molded line and a hub molded line of the impeller by a four-point control method, and drawing molded lines of the shell and the hub of the impeller on meridian flow surfaces;
the blade high section intercepting module is used for taking a plurality of blade high sections between a shell molded line and a hub molded line of the impeller;
the coordinate system conversion module is used for converting the cut three-dimensional leaf high sections into two-dimensional planes through angle-preserving transformation, and converting the coordinate system into a three-dimensional coordinate system
Conversion to two dimensions->
A flow surface coordinate system; />
Blade design module for in
Under the flow surface coordinate system, independently designing leaf shapes on two-dimensional planes corresponding to each leaf height;
a three-dimensional leaf profile acquisition module for passing each designed leaf profile through two dimensions
The coordinates of the flow surface are converted into three-dimensional Cartesian coordinates, namely three-dimensional leaf shapes at different leaf heights, and the maximum wrap angle is set according to +.>
Placing in a manner of (a) to obtain a three-dimensional leaf profile;
the impeller acquisition module is used for combining the designed three-dimensional blade profile with the shell molded line and the hub molded line of the impeller to obtain the impeller;
the spiral case design module is used for carrying out matching design on the spiral case according to a flow field in a spiral involute mode according to the designed impeller to obtain the spiral case.
The design method of the special high-speed centrifugal fan for the sweeping robot is used for designing the special high-speed centrifugal fan for the sweeping robot, and the special high-speed centrifugal fan comprises a volute and impellers arranged in the volute, wherein the impellers comprise hubs, a shell and blades, the periphery of each hub is annularly provided with a plurality of the blades, and the shell is arranged on two sides of the rotation direction of each blade;
the static pressure efficiency of the high-speed centrifugal fan at the design rotating speed of 30000rpm is 36% -42%, the noise at the rated working point is 63% -68 db, and the vacuum degree is 5800-6400 pa.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the impeller and the volute of the high-speed centrifugal fan are designed based on basic parameters of the high-speed centrifugal fan, the blades are designed by adopting a full three-dimensional modeling method, after the designed three-dimensional blade profile is combined with a shell molded line and a hub molded line of the impeller to obtain the impeller, the impeller is subjected to matching design according to the wind wheel, and then is diffused, a part of dynamic pressure generated by the impeller is converted into static pressure to obtain higher vacuum degree, so that the requirement of the high vacuum degree of the sweeping robot can be met, the high-speed centrifugal fan is designed by adopting a ternary design method based on a primitive level concept, the performance of the fan can be effectively improved, and the designed high-speed centrifugal fan has the advantages of high efficiency, high static pressure, low noise and high vacuum degree, and has good dust collection effect when being applied to the sweeping robot.
Drawings
FIG. 1 is a flow chart of a method of designing a high-speed centrifugal fan dedicated to a sweeping robot according to one embodiment of the invention;
FIG. 2 is a meridian flow profile diagram of step a2 of a design method of a high speed centrifugal fan dedicated to a sweeping robot in accordance with one embodiment of the present invention;
FIG. 3 is a schematic view of different blade heights of step a3 of a design method of a high-speed centrifugal fan dedicated to a sweeping robot according to an embodiment of the present invention;
FIG. 4 is a schematic view of blade profile parameters of step a5 of a design method of a high-speed centrifugal fan dedicated to a sweeping robot according to an embodiment of the present invention;
FIG. 5 is a schematic view of the configuration of the leading edge of the blade profile of step a5 of the design method of the high-speed centrifugal fan dedicated to the sweeping robot according to an embodiment of the present invention;
FIG. 6 is a schematic view of the configuration of the trailing edge of the blade profile of step a5 of the design method of the high-speed centrifugal fan dedicated to the sweeping robot according to an embodiment of the present invention;
FIG. 7 shows a two-dimensional profile of a blade of the high-speed centrifugal fan for the sweeping robot according to an embodiment of the present invention
Schematic diagram on flow surface coordinates;
FIG. 8 is a schematic view of different blade heights and blade shapes of step a6 of a design method of a high-speed centrifugal fan special for a sweeping robot according to an embodiment of the invention;
FIG. 9 is a schematic diagram of a space curve of a two-dimensional coordinate blade profile of step a6 of a design method of a high-speed centrifugal fan special for a sweeping robot according to an embodiment of the invention after the two-dimensional coordinate blade profile is converted into a three-dimensional Cartesian coordinate blade profile;
FIG. 10 is a schematic diagram of an axial plane curve of a two-dimensional coordinate blade profile of step a6 of a design method of a high-speed centrifugal fan special for a sweeping robot after the blade profile is converted into a three-dimensional Cartesian coordinate blade profile at a corresponding blade height according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a three-dimensional blade profile obtained by mixing different blade high section profile boundaries in step a6 of a design method of a special high speed centrifugal fan for a sweeping robot according to an embodiment of the present invention;
FIG. 12 is a parametric schematic of the volute molded lines of step a8 of the design method of the high-speed centrifugal fan dedicated to the sweeping robot according to one embodiment of the invention;
FIG. 13 is a schematic perspective view of a high-speed centrifugal fan dedicated to a sweeping robot according to an embodiment of the present invention;
FIG. 14 is a schematic perspective view of an impeller of a high-speed centrifugal fan dedicated to a sweeping robot according to an embodiment of the present invention;
FIG. 15 is a flow chart of example 1 of the present invention at 50% leaf height cross section at 5000Pa back pressure;
FIG. 16 is a flow chart of example 2 of the present invention at 50% leaf height cross section at 5000Pa back pressure;
FIG. 17 is a flow chart of example 3 of the present invention at 50% leaf height cross section at 5000Pa back pressure;
FIG. 18 is a flow chart of example 4 of the present invention at 50% leaf height cross section at 5000Pa back pressure;
in the accompanying drawings: volute 1, impeller 2, hub 21, casing 22, blades 23.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly, for distinguishing between the descriptive features, and not sequentially, and not lightly.
In the description of the present invention, unless otherwise indicated, the meaning of "plurality" is two or more.
As shown in fig. 1, a design method of a special high-speed centrifugal fan for a sweeping robot comprises the following steps:
step a1, determining the radius of an impeller inlet according to the installation size of the high-speed centrifugal fanR 1 Radius of impellerR 3 And blade widthBDetermining hub radius based on a given motor sizeR 2 ；
Step a2, according to the inlet radius of the impellerR 1 Radius of impellerR 3 And blade widthBThe shell molded line and the hub molded line of the impeller are respectively controlled by a four-point control method so as to draw molded lines of the shell and the hub of the impeller on meridian flow surfaces;
step a3, cutting a plurality of blade high sections between a shell molded line and a hub molded line of the impeller;
step a4, converting the cut three-dimensional leaf high sections into two-dimensional planes through angle-preserving transformation, and converting the coordinate system into a three-dimensional coordinate system
Conversion to two dimensions->
A flow surface coordinate system;
step a5, at
Under the flow surface coordinate system, independently designing leaf shapes on two-dimensional planes corresponding to each leaf height;
step a6, passing each designed leaf pattern through two dimensions
The coordinates of the flow surface are converted into three-dimensional Cartesian coordinates, namely three-dimensional leaf shapes at different leaf heights,and according to the maximum wrap angle>
Placing in a manner of (3) to obtain a three-dimensional leaf profile;
step a7, combining the designed three-dimensional blade profile with a shell molded line and a hub molded line of the impeller to obtain the impeller;
and a8, carrying out matching design on the spiral casing according to a flow field in a spiral involute mode according to the designed impeller to obtain the spiral casing.
The invention discloses a high-speed centrifugal fan special for a sweeping robot based on basic parameters of the high-speed centrifugal fan, wherein an impeller and a volute of the high-speed centrifugal fan are rapidly molded, the blades are combined with a shell molded line and a hub molded line of the impeller to obtain the impeller by adopting a full three-dimensional molding method, the impeller is subjected to matching design according to the volute of the impeller and then is diffused, a part of dynamic pressure generated by the impeller is converted into static pressure to obtain higher vacuum degree, the requirement of the high vacuum degree of the sweeping robot can be met, the high-speed centrifugal fan is designed by adopting a ternary design method based on a primitive level concept, the performance of the fan can be effectively improved, the designed high-speed centrifugal fan has the advantages of high efficiency, high static pressure, low noise and high vacuum degree, and good dust collection effect, and the high-speed centrifugal fan can be effectively applied to the sweeping robot.
As shown in fig. 2, in the step a2, the meridian flow surface profile is formed by a shell profile and a hub profile on the z-r plane, wherein the shell profile and the hub profile are controlled by three times of B spline curves of two four control points respectively;
the control points of the shell molded lines are respectivelyA 1 、A 2 、A 3 AndA 4 wherein the line segmentA 1 A 2 Keep level, line segmentA 3 A 4 Keep vertical, trace lineA 1 A 2 Length of (2)L 1 Line segmentA 3 A 4 Length of (2)L 2 ；
The control points of the hub molded lines are respectivelyA 5 、A 6 、A 7 AndA 8 wherein the line segmentA 5 A 6 Keep level, line segmentA 7 A 8 Keep vertical, trace lineA 5 A 6 Length of (2)L 3 Line segmentA 7 A 8 Length of (2)L 4 ；
Wherein the control pointA 1 And control pointA 5 Is the same as the abscissa of the control pointA 4 And control pointA 8 Is the same as the ordinate of (c);
control pointA 1 Is the longitudinal coordinate value of (2)R 1 Value of (2), control pointA 5 Is the longitudinal coordinate value of (2)R 2 Value of (2), control pointA 4 Control pointA 8 Is the longitudinal coordinate value of (2)R 3 Value of (2), control pointA 4 And control pointA 8 The difference between the abscissa of (2) and the abscissa of (2) is the width of the bladeB。
L 1 The range of (2) is 0.3%R 1 -R 2 )~0.6(R 1 -R 2 )，L 2 Is in the range of 0.9B to 1.1B，L 3 The range of (2) is 1.2%R 1 -R 2 )~1.4(R 1 -R 2 )，L 4 The range of (2) is 1.2B-1.4B. By defining control pointsA 1 And control pointA 5 Is the same as the abscissa of the control pointA 4 And control pointA 8 The vertical coordinates of the blades are the same, and the axial air inlet and radial air outlet of the centrifugal fan are ensured, specifically, the width of the blades, namely the width of the impeller outlet.
Preferably, in the step a3, 1-15 blade high sections are taken between the shell molded line and the hub molded line by adopting an interpolation method.
Specifically, the interpolation method is a Lagrange interpolation method, and because the flow fields at different blade heights are different, blade profile interception is carried out between the shell profile and the hub profile by the interpolation method according to the determined shell profile and the hub profile, and each blade height is independently designed to be attached to an actual flow field.
In the present embodiment, as shown in fig. 3, in the step a3, interpolation is used to construct leaf height sections of 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% respectively, with a 10% height gradient between the shell profile and the hub profile.
The number of interpolation methods is 1-15, in this embodiment, according to the height gradient change of 10%, the more the interpolation number is, the more the blade profile of the impeller is attached to the actual flow field, the higher the efficiency is, and the smaller the loss is. When the number of the designed blade height sections is larger, the number of the corresponding design variables is larger, and when the number of the designed blade height sections is smaller, the blade profile is distorted, and the surface is not continuous enough.
Each high-section leaf needs to independently design a three-dimensional primitive-level molded line, converts a three-dimensional space curve into a two-dimensional curve through angle-preserving transformation, and expands the three-dimensional cross-section molded line into a two-dimensional plane to form a three-dimensional coordinate system
Conversion to two dimensions->
Flow surface coordinate system. Further, in the step a4, the two-dimensional leaf profile is defined as +.>
Under the flow surface coordinate system, < >>
The flow surface coordinate system is obtained by three-dimensional cylindrical coordinate system through angle-preserving transformation:
wherein ,zis thatzThe coordinate value of the axial direction,rfor the coordinate value of the radial direction, definemFor the length of the meridian,m’is a dimensionless meridian length;
for leaf-type discrete points in a three-dimensional Cartesian coordinate system, two-dimensional integration is obtained through the following trapezoidal rule
Flow surface coordinates:
wherein ,θis a circumference angle, an angle markiIs the sequence number of discrete points, andzthe plane perpendicular to the axis beingxoyA plane surface of the glass fiber reinforced plastic plate,xis thatxoyPlanar surfacexThe coordinate value of the direction,yis thatxoyPlanar surfaceyThe coordinate value of the direction,zis thatzThe coordinate value of the axial direction,ris the coordinate value of the radial direction, wherein
。
As shown in FIGS. 4 to 6, in step a5, the blade profile is defined by the leading edgeP 1 S 1 Trailing edgeP 4 S 4 Curve of suction surfaceS 1 S 2 S 3 S 4 Curve of pressure surfaceP 1 P 2 P 3 P 4 Four sections of curves, wherein the suction surface curve and the pressure surface curve are 3 times B spline curves with four control points, the leading edge and the trailing edge are respectively circular arcs,P 1 、P 2 、P 3 andP 4 are all control points of the pressure surface curve,S 1 、S 2 、S 3 andS 4 control points of the suction surface curves;
wherein, the line segmentP 1 P 2 And line segmentS 1 S 2 Parallel, line segmentP 2 P 3 And line segmentS 2 S 3 Parallel, line segmentP 3 P 4 And line segmentS 3 S 4 Parallel to each other;
definition of the definitionβ 1 For the inlet air flow angle,β 1 is a line segmentS 1 S 2 And line segmentS 1 S 4 The included angle of (2) is less than or equal to 25 degreesβ 1 ≤45°；
Definition of the definitionβ 2 As the angle of the outlet air flow,β 2 is a line segmentS 3 S 4 And line segmentS 1 S 4 The included angle of (2) is less than or equal to 25 degreesβ 2 ≤45°；
Definition of the definitionS 1 And (3) withP 1 Distance of (2)R l And line segmentS 1 S 4 Is the leading edge coefficientχ l ，0.01≤χ l ≤0.04；
Definition of the definitionS 4 And (3) withP 4 Distance of (2)R t And line segmentS 1 S 4 Is the trailing edge coefficientχ t ，0.005≤χ t ≤0.02；
Define a suction surface curve distance line segmentS 1 S 4 Maximum value of (2) is the camber
，0.05≤/>
≤0.2。
The front edge coefficient and the tail edge coefficient directly influence the thickness of the blade profile, and if the front edge coefficient and the tail edge coefficient are too large and the blade profile is too thick, the mass of the impeller can be heavy, so that the high-speed centrifugal fan is difficult to start; if the leading edge coefficient and the trailing edge coefficient are too small and the blade profile is too thin, the structural strength of the impeller is insufficient and the impeller is easy to break; in addition, by defining the camber of the blade profile, if the camber is too large, the air flow is easily separated, resulting in an increase in air flow loss; and too small a camber of the blade profile may result in insufficient work capacity of the blade.
As shown in fig. 7 and 11, in step a6, further explanation is provided
In the coordinate system of the flow surface,
abscissa of flow surface coordinate systemθIs expressed in radian, the two-dimensional leaf profile is placed, and the maximum wrap angle is defined>
Two dimensions +.>
The coordinates of the flow surface are converted into three-dimensional Cartesian coordinates, three-dimensional leaf shapes at different leaf heights are obtained, and the three-dimensional leaf shapes are obtained through boundary mixing.
As shown in FIG. 12, further advancedIn the step a8, the molded line of the volute is an involute spiral line, and the molded line of the volute is formed by five arc lines which are connected in sequenceC 1 、C 2 、C 3 、C 4 、C 5 And a section of straight lineD 1 Composition, straight lineD 1 Connected to an arcC 5 Is a terminal end of (2);
G 1 to the point ofG 2 The arc line between them is an arc lineC 1 Arc lineC 1 The corresponding circle center isO 1 ，O 1 Is the center of a circle of the impeller, an arc lineC 1 Corresponding radius isE 1 ；
G 2 To the point ofG 3 The arc line between them is an arc lineC 2 Arc lineC 2 The corresponding circle center isO 2 Arc lineC 2 Corresponding radius isE 2 ；
G 3 To the point ofG 4 The arc line between them is an arc lineC 3 Arc lineC 3 The corresponding circle center isO 3 Arc lineC 3 Corresponding radius isE 3 ；
G 4 To the point ofG 5 The arc line between them is an arc lineC 4 Arc lineC 4 The corresponding circle center isO 4 Arc lineC 4 Corresponding radius isE 4 ；
G 5 To the point ofG 6 The arc line between them is an arc lineC 5 Arc lineC 5 The corresponding circle center isO 5 Arc lineC 5 Corresponding radius isE 5 ；
In the present embodiment, the center of circleO 1 Included angle of (2): angle of jointG 1 O 1 G 2 =85°～95°，∠G 2 O 1 G 3 =20°～30°，∠G 3 O 1 G 4 =90°，∠G 4 O 1 G 5 =90°, straight lineD 1 Included angle with vertical lineH8-15 degrees;
E 1 =32mm～35mm，E 2 =32mm～35mm，E 3 =34mm～37mm，E 4 =36mm～39mm， E 5 21 mm-23 mm, and center of circleO 2 Center of circleO 3 And center of a circleO 4 An isosceles right triangle is formed,O 2 O 3 =O 3 O 4 =2mm。
the molded line of the volute is an involute spiral line, diffuser is carried out after the matching design of the volute is carried out according to the wind wheel, and a part of dynamic pressure generated by the impeller is converted into static pressure so as to obtain higher vacuum degree and meet the requirement of high vacuum degree of the sweeper.
The design device of the special high-speed centrifugal fan of the sweeping robot is used for executing the design method of the special high-speed centrifugal fan of the sweeping robot, and comprises the following steps:
the molded line drawing module is used for drawing a molded line according to the radius of an inlet of the impellerR 1 Radius of impellerR 3 And blade widthBRespectively controlling a shell molded line and a hub molded line of the impeller by a four-point control method, and drawing molded lines of the shell and the hub of the impeller on meridian flow surfaces;
the blade high section intercepting module is used for taking a plurality of blade high sections between a shell molded line and a hub molded line of the impeller;
the coordinate system conversion module is used for converting the cut three-dimensional leaf high sections into two-dimensional planes through angle-preserving transformation, and converting the coordinate system into a three-dimensional coordinate system
Conversion to two dimensions->
A flow surface coordinate system;
blade design module for in
Under the flow surface coordinate system, independently designing leaf shapes on two-dimensional planes corresponding to each leaf height;
a three-dimensional leaf profile acquisition module for passing each designed leaf profile through two dimensions
The coordinates of the flow surface are converted into three-dimensional Cartesian coordinates, namely three-dimensional leaf shapes at different leaf heights, and the maximum wrap angle is set according to +.>
Placing in a manner of (a) to obtain a three-dimensional leaf profile;
the impeller acquisition module is used for combining the designed three-dimensional blade profile with the shell molded line and the hub molded line of the impeller to obtain the impeller;
the spiral case design module is used for carrying out matching design on the spiral case according to a flow field in a spiral involute mode according to the designed impeller to obtain the spiral case.
The design device of the high-speed centrifugal fan special for the sweeping robot is used for carrying out the design of the high-speed centrifugal fan special for the sweeping robot, parameter optimization can be carried out according to specific working conditions in the design process, and the whole design process adopts computer-aided design, so that the manual error is reduced, the design efficiency is improved, and the parameter is conveniently adjustable. The designer determines the blade according to the installation size of the high-speed centrifugal fan according to the actual situationRadius of wheel inletR 1 Radius of impellerR 3 And blade widthBAnd determining hub radius based on a given motor sizeR 2 Then input into a computer, and then generate the leaf profile in three dimensions.
As shown in fig. 13 and 14, a special high-speed centrifugal fan for a sweeping robot is designed by using a design method of the special high-speed centrifugal fan for the sweeping robot, and comprises a volute 1 and an impeller 2 arranged in the volute 1, wherein the impeller 2 comprises a hub 21, a casing 22 and blades 23, a plurality of blades 23 are annularly arranged on the periphery of the hub 21, and the casing 22 is arranged on two sides of the rotation direction of the blades 23;
the static pressure efficiency of the high-speed centrifugal fan at the design rotating speed of 30000rpm is 36% -42%, the noise at the rated working point is 63% -68 db, and the vacuum degree is 5800-6400 pa.
Example 1
For +.G 1 O 1 G 2 =88°，∠G 2 O 1 G 3 =24.8°，∠G 3 O 1 G 4 =90°，∠G 4 O 1 G 5 =90°, straight lineD 1 Included angle with vertical lineHAt 12,E 1 =33.8mm，E 2 =33.3mm，E 3 =35.3mm，E 4 =37.3mm，E 5 =22 mm. Impeller inlet radius R 1 =12 mm, impeller radius R 3 30mm, blade width b=6mm, hub radius R 2 =4mm。L 1 The diameter of the particles is 2.6mm,L 2 the diameter of the particles is 5.4mm,L 3 the diameter of the particles is 10.0mm,L 4 7.8mm. An outer rotor brushless direct current motor is adopted, and the motor design rotating speed is 30000rpm. The two-dimensional leaf profile parameters are:β 1 =30°，β 2 =25°，
=25°, camber->
=0.12，Leading edge coefficientχ l =2%, trailing edge coefficientχ t =0.4%。
Example 2
For +.G 1 O 1 G 2 =88°，∠G 2 O 1 G 3 =24.8°，∠G 3 O 1 G 4 =90°，∠G 4 O 1 G 5 =90°, straight lineD 1 Included angle with vertical lineHAt 12,E 1 =33.8mm，E 2 =33.3mm，E 3 =35.3mm，E 4 =37.3mm，E 5 =22 mm. Impeller inlet radius R 1 =12 mm, impeller radius R 3 30mm, blade width b=6mm, hub radius R 2 =4mm。L 1 The diameter of the particles is 2.6mm,L 2 the diameter of the particles is 5.4mm,L 3 the diameter of the particles is 10.0mm,L 4 7.8mm. An outer rotor brushless direct current motor is adopted, and the motor design rotating speed is 30000rpm. The two-dimensional leaf profile parameters are:β 1 =35°，β 2 =30°，
=35°, camber->
=0.12，Leading edge coefficientχ l =2%, trailing edge coefficientχ t =0.4%。
Example 3
For +.G 1 O 1 G 2 =88°，∠G 2 O 1 G 3 =24.8°，∠G 3 O 1 G 4 =90°，∠G 4 O 1 G 5 =90°, straight lineD 1 Included angle with vertical lineHAt 12,E 1 =33.8mm，E 2 =33.3mm，E 3 =35.3mm，E 4 =37.3mm，E 5 =22 mm. Impeller inlet radius R 1 =12 mm, impeller radius R 3 30mm, blade width b=6mm, hub radius R 2 =4mm。L 1 The diameter of the particles is 2.6mm,L 2 the diameter of the particles is 5.4mm,L 3 the diameter of the particles is 10.0mm,L 4 7.8mm. An outer rotor brushless direct current motor is adopted, and the motor design rotating speed is 30000rpm. The two-dimensional leaf profile parameters are:β 1 =40°，β 2 =35°，
=40°, camber->
=0.12，Leading edge coefficientχ l =2%, trailing edge coefficientχ t =0.4%。
Example 4
In the example, the high-speed centrifugal fan has fixed volute size, and the ratio of the volute to the volute is as followsG 1 O 1 G 2 =88°，∠G 2 O 1 G 3 =24.8°，∠G 3 O 1 G 4 =90°，∠G 4 O 1 G 5 =90°, straight lineD 1 Included angle with vertical lineHAt 12,E 1 =33.8mm，E 2 =33.3mm，E 3 =35.3mm，E 4 =37.3mm，E 5 =22 mm. Impeller inlet radius R 1 =12 mm, impeller radius R 3 30mm, blade width b=6mm, hub radius R 2 =4mm。L 1 The diameter of the particles is 2.6mm,L 2 the diameter of the particles is 5.4mm,L 3 the diameter of the particles is 10.0mm,L 4 7.8mm. An outer rotor brushless direct current motor is adopted, and the motor design rotating speed is 30000rpm. The two-dimensional leaf profile parameters are:β 1 =45°，β 2 =40°，
=50°, camber->
=0.12，Leading edge coefficientχ l =2%, trailing edge coefficientχ t =0.4%。
Examples 1 to 4 employed volutes of the same size.
Comparative example 1
The volute is adopted in the comparative example as in the example, the vane profile of the impeller is a double-arc vane profile, the geometric inlet angle of the vane profile is 60 degrees, the outlet angle is 45 degrees, the connecting position of two sections of arcs is 30% chord length, the tangential angle of the connecting position is 45 degrees, the two-dimensional vane profile is stretched for 6mm along the radial direction to generate a three-dimensional vane profile, and 13 vane profiles are formed along the circumferential array to generate a three-dimensional centrifugal impeller model. The impeller has an outer diameter of 30mm and an inner diameter of 12mm.
Air volume, static pressure efficiency and noise were tested for examples 1 to 4 and comparative examples, and the test results are shown in table 1 below:
table 1 test results of examples 1 to 4 and comparative example
Fig. 15 to 18 are flow charts of the present invention at 50% of the high-section of the blade at a back pressure of 5000pa in examples 1 to 4, and the numerical simulation results of the comparative examples and examples 1, 2, 3 and 4 show that the fan efficiency is effectively improved by changing the blade profile parameters in examples 1 to 4 without changing the volute. The fan of example 3 performs optimally given the operation being compressed 5000. Compared with other embodiments, embodiment 3 changes the maximum wrap angle of the blade, improves the efficiency of the fan and reduces the working noise of the fan.
The high-speed centrifugal fan designed by the design method of the special high-speed centrifugal fan for the sweeping robot has the advantages of high efficiency, high static pressure, low noise and high vacuum degree, and is applied to the sweeping robot, and the sweeping robot has good dust collection effect.
The technical principle of the present invention is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the invention and should not be taken in any way as limiting the scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (9)
1. The design method of the special high-speed centrifugal fan for the sweeping robot is characterized by comprising the following steps of:
step a1, determining the radius of an impeller inlet according to the installation size of the high-speed centrifugal fanR 1 Radius of impellerR 3 And blade widthBDetermining hub radius based on a given motor sizeR 2 ；
Step a2, according to the inlet radius of the impellerR 1 Radius of impellerR 3 And blade widthBThe shell molded line and the hub molded line of the impeller are respectively controlled by a four-point control method so as to draw molded lines of the shell and the hub of the impeller on meridian flow surfaces;
step a3, cutting a plurality of blade high sections between a shell molded line and a hub molded line of the impeller;
step a4, converting the cut three-dimensional high-section of each leaf into two through angle-preserving transformationDimensional plane, the coordinate system is changed from three-dimensional coordinate system
Conversion to two dimensions->
A flow surface coordinate system;
step a5, at
Under the flow surface coordinate system, independently designing leaf shapes on two-dimensional planes corresponding to each leaf height;
step a6, passing each designed leaf pattern through two dimensions
The coordinates of the flow surface are converted into three-dimensional Cartesian coordinates, namely three-dimensional leaf shapes at different leaf heights, and the maximum wrap angle is set according to +.>
Placing in a manner of (3) to obtain a three-dimensional leaf profile;
step a7, combining the designed three-dimensional blade profile with a shell molded line and a hub molded line of the impeller to obtain the impeller;
step a8, matching design is carried out on the spiral casing according to a flow field in a spiral involute mode according to the designed impeller, and the spiral casing is obtained;
in the step a4, a two-dimensional leaf pattern is defined in
Under the flow surface coordinate system, < >>
The flow surface coordinate system is obtained by three-dimensional cylindrical coordinate system through angle-preserving transformation:
wherein ,zis thatzAxial directionIs a coordinate value of (a),rfor the coordinate value of the radial direction, definemFor the length of the meridian,m’is a dimensionless meridian length;
for leaf-type discrete points in a three-dimensional Cartesian coordinate system, two-dimensional integration is obtained through the following trapezoidal rule
Flow surface coordinates:
wherein ,θis a circumference angle, an angle markiIs the sequence number of discrete points, andzthe plane perpendicular to the axis beingxoyA plane surface of the glass fiber reinforced plastic plate,xis thatxoyPlanar surfacexThe coordinate value of the direction,yis thatxoyPlanar surfaceyThe coordinate value of the direction,zis thatzThe coordinate value of the axial direction,ris the coordinate value of the radial direction, wherein
。
2. The method for designing a high-speed centrifugal fan special for a sweeping robot according to claim 1, wherein in the step a2, meridian flow surface molded lines are respectively formed by a shell molded line and a hub molded line on a z-r plane, and the shell molded line and the hub molded line are respectively controlled by three-time B spline curves of two four control points;
the control points of the shell molded lines are respectivelyA 1 、A 2 、A 3 AndA 4 wherein the line segmentA 1 A 2 Keep level, line segmentA 3 A 4 Keep vertical, trace lineA 1 A 2 Length of (2)L 1 Line segmentA 3 A 4 Length of (2)L 2 ；
The control points of the hub molded lines are respectivelyA 5 、A 6 、A 7 AndA 8 wherein the line segmentA 5 A 6 Keep level, line segmentA 7 A 8 Keep vertical, trace lineA 5 A 6 Length of (2)L 3 Line segmentA 7 A 8 Length of (2)L 4 ；
Wherein the control pointA 1 And control pointA 5 Is the same as the abscissa of the control pointA 4 And control pointA 8 Is the same as the ordinate of (c);
control pointA 1 Is the longitudinal coordinate value of (2)R 1 Value of (2), control pointA 5 Is the longitudinal coordinate value of (2)R 2 Value of (2), control pointA 4 Control pointA 8 Is the longitudinal coordinate value of (2)R 3 Value of (2), control pointA 4 And control pointA 8 The difference between the abscissa of (2) and the abscissa of (2) is the width of the bladeB；
L 1 The range of (2) is 0.3%R 1 -R 2 )~0.6(R 1 -R 2 )，L 2 In the range of 0.9B to 1.1B,L 3 the range of (2) is 1.2%R 1 -R 2 )~1.4(R 1 -R 2 )，L 4 The range of (2) is 1.2B-1.4B.
3. The method for designing a high-speed centrifugal fan special for a sweeping robot according to claim 1, wherein in the step a3, 1-15 blade high sections are taken between a shell molded line and a hub molded line by adopting an interpolation method.
4. The method for designing a high-speed centrifugal fan dedicated to a sweeping robot according to claim 3, wherein in the step a3, an interpolation method is adopted to construct leaf high sections of 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% respectively according to a 10% height gradient change between a shell molded line and a hub molded line.
5. The method for designing a high-speed centrifugal fan dedicated to a sweeping robot according to claim 1, wherein in the step a5, the blade profile is formed by a front edgeP 1 S 1 Trailing edgeP 4 S 4 Curve of suction surfaceS 1 S 2 S 3 S 4 Curve of pressure surfaceP 1 P 2 P 3 P 4 Four sections of curves, wherein the suction surface curve and the pressure surface curve are 3 times B spline curves with four control points, the leading edge and the trailing edge are respectively circular arcs,P 1 、P 2 、P 3 andP 4 are all control points of the pressure surface curve,S 1 、S 2 、S 3 andS 4 control points of the suction surface curves;
wherein, the line segmentP 1 P 2 And line segmentS 1 S 2 Parallel, line segmentP 2 P 3 And line segmentS 2 S 3 Parallel, line segmentP 3 P 4 And line segmentS 3 S 4 Parallel to each other;
definition of the definitionβ 1 For the inlet air flow angle,β 1 is a line segmentS 1 S 2 And line segmentS 1 S 4 The included angle of (2) is less than or equal to 25 degreesβ 1 ≤45°；
Definition of the definitionβ 2 As the angle of the outlet air flow,β 2 is a line segmentS 3 S 4 And line segmentS 1 S 4 The included angle of (2) is less than or equal to 25 degreesβ 2 ≤45°；
Definition of the definitionS 1 And (3) withP 1 Distance of (2)R l And line segmentS 1 S 4 Is the leading edge coefficientχ l ，0.01≤χ l ≤0.04；
Definition of the definitionS 4 And (3) withP 4 Distance of (2)R t And line segmentS 1 S 4 Is the trailing edge coefficientχ t ，0.005≤χ t ≤0.02；
Define a suction surface curve distance line segmentS 1 S 4 Maximum value of (2) is the camber
，0.05≤/>
≤0.2。
6. The method for designing a high-speed centrifugal fan dedicated to a sweeping robot according to claim 5, wherein in step a6
Under the flow surface coordinate system, < >>
Abscissa of flow surface coordinate systemθIs expressed in radian, the two-dimensional leaf profile is placed, and the maximum wrap angle is defined>
Two dimensions +.>
The coordinates of the flow surface are converted into three-dimensional Cartesian coordinates, three-dimensional leaf shapes at different leaf heights are obtained, and the three-dimensional leaf shapes are obtained through boundary mixing.
7. The method for designing a high-speed centrifugal fan special for a sweeping robot according to claim 1, wherein in the step a8, the molded line of the volute is an involute spiral line, and the molded line of the volute is formed by five arc lines which are sequentially connectedC 1 、C 2 、C 3 、C 4 、C 5 And a section of straight lineD 1 Composition, straight lineD 1 Connected to an arcC 5 Is a terminal end of (2);
G 1 to the point ofG 2 The arc line between them is an arc lineC 1 Arc lineC 1 The corresponding circle center isO 1 ，O 1 Is the center of a circle of the impeller, an arc lineC 1 Corresponding radius isE 1 ；
G 2 To the point ofG 3 The arc line between them is an arc lineC 2 Arc lineC 2 The corresponding circle center isO 2 Arc lineC 2 Corresponding radius isE 2 ；
G 3 To the point ofG 4 The arc line between them is an arc lineC 3 Arc lineC 3 The corresponding circle center isO 3 Arc lineC 3 Corresponding radius isE 3 ；
G 4 To the point ofG 5 The arc line between them is an arc lineC 4 Arc lineC 4 The corresponding circle center isO 4 Arc lineC 4 Corresponding radius isE 4 ；
G 5 To the point ofG 6 The arc line between them is an arc lineC 5 Arc lineC 5 The corresponding circle center isO 5 Arc lineC 5 Corresponding radius isE 5 ；
For the center of circleO 1 Included angle of (2): angle of jointG 1 O 1 G 2 =85°～95°，∠G 2 O 1 G 3 =20°～30°，∠G 3 O 1 G 4 =90°，∠G 4 O 1 G 5 =90°, straight lineD 1 Included angle with vertical lineH8-15 degrees;
E 1 =32mm～35mm，E 2 =32mm～35mm，E 3 =34mm～37mm，E 4 =36mm～39mm，E 5 21 mm-23 mm, and center of circleO 2 Center of circleO 3 And center of a circleO 4 An isosceles right triangle is formed,O 2 O 3 =O 3 O 4 =2mm。
8. a design apparatus for a high-speed centrifugal fan dedicated for a sweeping robot, characterized by performing the design method for a high-speed centrifugal fan dedicated for a sweeping robot according to any one of claims 1 to 7, comprising:
the molded line drawing module is used for drawing a molded line according to the radius of an inlet of the impellerR 1 Radius of impellerR 3 And blade widthBRespectively controlling a shell molded line and a hub molded line of the impeller by a four-point control method, and drawing molded lines of the shell and the hub of the impeller on meridian flow surfaces;
the blade high section intercepting module is used for taking a plurality of blade high sections between a shell molded line and a hub molded line of the impeller;
the coordinate system conversion module is used for converting the cut three-dimensional leaf high sections into two-dimensional planes through angle-preserving transformation, and converting the coordinate system into a three-dimensional coordinate system
Conversion to two dimensions->
A flow surface coordinate system;
blade design module for in
Under the flow surface coordinate system, independently designing leaf shapes on two-dimensional planes corresponding to each leaf height;
a three-dimensional leaf profile acquisition module for passing each designed leaf profile through two dimensions
The coordinates of the flow surface are converted into three-dimensional Cartesian coordinates, namely three-dimensional leaf shapes at different leaf heights, and the maximum wrap angle is set according to +.>
Placing in a manner of (a) to obtain a three-dimensional leaf profile;
the impeller acquisition module is used for combining the designed three-dimensional blade profile with the shell molded line and the hub molded line of the impeller to obtain the impeller;
the spiral case design module is used for carrying out matching design on the spiral case according to a flow field in a spiral involute mode according to the designed impeller to obtain the spiral case.
9. The special high-speed centrifugal fan for the sweeping robot is characterized by comprising a volute and impellers arranged in the volute, wherein the impellers comprise a hub, a shell and blades, the plurality of blades are annularly arranged on the periphery of the hub, and the shell is arranged on two sides of the rotation direction of the blades;
the static pressure efficiency of the high-speed centrifugal fan at the design rotating speed of 30000rpm is 36% -42%, the noise at the rated working point is 63% -68 db, and the vacuum degree is 5800-6400 pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310034093.9A CN115758629B (en) | 2023-01-10 | 2023-01-10 | Special high-speed centrifugal fan for sweeping robot and design method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310034093.9A CN115758629B (en) | 2023-01-10 | 2023-01-10 | Special high-speed centrifugal fan for sweeping robot and design method and device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115758629A CN115758629A (en) | 2023-03-07 |
| CN115758629B true CN115758629B (en) | 2023-05-16 |
Family
ID=85348886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310034093.9A Active CN115758629B (en) | 2023-01-10 | 2023-01-10 | Special high-speed centrifugal fan for sweeping robot and design method and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115758629B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117094181B (en) * | 2023-10-19 | 2024-02-06 | 广东顺威精密塑料股份有限公司 | Unequal-thickness twisted backward centrifugal fan and design method and device thereof |
| CN117709026A (en) * | 2024-02-05 | 2024-03-15 | 广东顺威精密塑料股份有限公司 | Design method and design device for long and short blade type backward centrifugal impeller |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN218062787U (en) * | 2022-03-02 | 2022-12-16 | 广州雷辰机电技术有限公司 | Impeller, fan and dust catcher |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9581170B2 (en) * | 2013-03-15 | 2017-02-28 | Honeywell International Inc. | Methods of designing and making diffuser vanes in a centrifugal compressor |
| CN108119402A (en) * | 2017-09-06 | 2018-06-05 | 广东顺威精密塑料股份有限公司 | A kind of spiral case inlet pressure structure of centrifugal blower |
| CN108256185B (en) * | 2018-01-03 | 2019-05-28 | 西安交通大学 | A kind of radial velocity component methods of exhibiting for multi-wing centrifugal fan impeller inlet face |
| CN108153998B (en) * | 2018-01-25 | 2021-09-03 | 哈尔滨工业大学 | Full three-dimensional pneumatic optimization design method for centrifugal blower impeller |
| CN111859556B (en) * | 2020-06-17 | 2022-08-09 | 中国航发湖南动力机械研究所 | Centrifugal impeller design method and system based on double-quartic Bezier curved surface |
| CN113090580B (en) * | 2021-04-16 | 2023-04-14 | 中国科学院工程热物理研究所 | Centrifugal impeller blade with S-shaped front edge and modeling method thereof |
| CN114519238B (en) * | 2022-01-18 | 2022-12-02 | 中国航发湖南动力机械研究所 | Full three-dimensional modeling method and device for high-performance impeller mechanical blade and electronic equipment |
| CN114483648B (en) * | 2022-01-27 | 2024-04-09 | 杭州老板电器股份有限公司 | Blade design the method is blade and centrifugal fan |
-
2023
- 2023-01-10 CN CN202310034093.9A patent/CN115758629B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN218062787U (en) * | 2022-03-02 | 2022-12-16 | 广州雷辰机电技术有限公司 | Impeller, fan and dust catcher |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115758629A (en) | 2023-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115758629B (en) | Special high-speed centrifugal fan for sweeping robot and design method and device thereof | |
| CN113153773B (en) | Bionic multi-wing centrifugal fan impeller and preparation method thereof | |
| CN204532956U (en) | Centrifugal impeller, centrifugal blower assembly and air-conditioner set | |
| CN112464413A (en) | Circumferential bending type axial flow fan and design method thereof | |
| CN106939902B (en) | Energy-saving straight-wall front and rear disk variable-curvature curve element ternary impeller and centrifugal fan adopting same | |
| CN111156198A (en) | Volute with stepped variable-radius volute tongue and centrifugal ventilator | |
| CN113309736A (en) | Blade, impeller, centrifugal fan, range hood and blade design method | |
| CN117150818B (en) | Diagonal flow fan and design method and design device thereof | |
| CN113090580B (en) | Centrifugal impeller blade with S-shaped front edge and modeling method thereof | |
| CN108980103B (en) | Design method of forward multi-wing centrifugal ventilator impeller with inlet winglet | |
| CN117094181B (en) | Unequal-thickness twisted backward centrifugal fan and design method and device thereof | |
| CN110552910A (en) | Wind wheel and centrifugal fan | |
| CN210769513U (en) | Wind wheel and centrifugal fan | |
| CN2045433U (en) | Mixed-flow type fan | |
| CN115596707B (en) | Axial-flow impeller with vortex generator | |
| CN205714857U (en) | A kind of antecurvature multiple wing type centrifugal blower fan | |
| CN215293004U (en) | Blade, impeller, centrifugal fan and range hood | |
| CN212297021U (en) | Blade of ventilator and axial flow ventilator thereof | |
| CN211715409U (en) | Structure of volute wind wheel air duct system | |
| CN203098386U (en) | Axial fan blade | |
| CN111536075A (en) | Blade of ventilator and axial flow ventilator thereof | |
| CN110566501A (en) | Forward-bending type fan blade, impeller and centrifugal fan | |
| CN201281043Y (en) | Axial fan | |
| CN201843798U (en) | Wind tunnel type fan | |
| CN205937224U (en) | Impeller device and be equipped with this impeller device's axial -flow blower |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |