[go: up one dir, main page]

CN216044614U - An integrally formed curved and swept combined blade, impeller and axial flow fan - Google Patents

An integrally formed curved and swept combined blade, impeller and axial flow fan Download PDF

Info

Publication number
CN216044614U
CN216044614U CN202120313080.1U CN202120313080U CN216044614U CN 216044614 U CN216044614 U CN 216044614U CN 202120313080 U CN202120313080 U CN 202120313080U CN 216044614 U CN216044614 U CN 216044614U
Authority
CN
China
Prior art keywords
blade
impeller
swept
curved
motor
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
Application number
CN202120313080.1U
Other languages
Chinese (zh)
Inventor
师岗
王荣泉
张旭辉
周华荣
万翔
行江艳
薛旭升
郭辰平
万继成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xi'an Reshipment Hancheng Coal Mine Machinery Co ltd
Xian University of Science and Technology
Original Assignee
Xi'an Reshipment Hancheng Coal Mine Machinery Co ltd
Xian University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xi'an Reshipment Hancheng Coal Mine Machinery Co ltd, Xian University of Science and Technology filed Critical Xi'an Reshipment Hancheng Coal Mine Machinery Co ltd
Priority to CN202120313080.1U priority Critical patent/CN216044614U/en
Application granted granted Critical
Publication of CN216044614U publication Critical patent/CN216044614U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

本实用新型公开了一种整体成型的弯掠组合叶片及矿用轴流通风机，多个弯掠组合叶片沿轮毂周向均匀安装构成叶轮，所述的控制弯掠组合叶片的叶身形状的重心积叠线是二次Bezier曲线，矿用轴流通风机的一级叶轮和二级叶轮相对设置，按相反方向旋转。本实用新型采用的控制弯掠组合叶片的叶身形状的重心积叠线是二次Bezier曲线的弯掠组合叶片，有效控制了叶片径向力梯度和沿叶高的二次流分布，消除附面层堆积及避免漩涡的汇合，降低涡流噪声，增加矿用轴流通风机的气动性能，提高矿用轴流通风机的工作效率。通过实验证明本实用新型提供的矿用轴流通风机全压效率为87％，比传统矿用轴流通风机全压效率提高了5％以上。

Figure 202120313080

The utility model discloses an integrally formed curved and swept combined blade and a mining axial flow fan. A plurality of curved and swept combined blades are evenly installed along the circumferential direction of a hub to form an impeller. The center of gravity stacking line is a quadratic Bezier curve. The primary and secondary impellers of the mine axial flow fan are set opposite each other and rotate in opposite directions. The center-of-gravity stacking line that controls the shape of the blade body of the curved and swept composite blade adopted by the utility model is the curved and swept composite blade of the quadratic Bezier curve, which effectively controls the radial force gradient of the blade and the secondary flow distribution along the blade height, and eliminates attachment Surface layer accumulation and avoiding the confluence of vortices, reduce eddy current noise, increase the aerodynamic performance of the mine axial flow fan, and improve the working efficiency of the mine axial flow fan. It is proved by experiments that the full pressure efficiency of the mine axial flow fan provided by the utility model is 87%, which is more than 5% higher than the full pressure efficiency of the traditional mine axial flow fan.

Figure 202120313080

Description

Integrally formed curved and swept combined blade, impeller and axial flow fan
Technical Field
The utility model belongs to the field of ventilation of coal mines, and relates to an axial flow fan for a mine, in particular to an integrally formed curved and swept combined blade, an impeller and an axial flow fan.
Background
The mining fan is used as main technical equipment for mine safety production, is an important component of a mine ventilation system, and is the basis for mine safety production and disaster prevention and control. The problems of high and low operating efficiency and reliability of the mining fan are the focus of concern in coal mines. As the local old mine fan is aged and has low operating efficiency and is gradually replaced by the high-efficiency energy-saving fan, various fans are produced at the same time, and the counter-rotating fan is an updated product of the mine fan which is developed and produced by introducing a new technology of 80 years abroad after digestion and absorption. The coal mine air-conditioning system is deeply favored by coal mines due to the characteristics of high pressure, large flow, high efficiency, compact structure and easy air reversing. However, temporary practices prove that the counter-rotating axial flow mining fan has the defects of large noise and the like.
The energy consumption and noise of the ventilator are directly related to the core component of the ventilator, namely the fan blades, and the blade technology determines the final performance of the ventilator. Besides the torsion along the spanwise direction, the swept blade has the inclination (bending) along the circumferential rotation direction and the inclination (sweeping) along the incoming flow direction between the blade body top and the blade shank, and is a blade with a complex three-dimensional space structure. At present, the sweepback blades are widely applied to impeller machinery, and a large number of experimental researches and numerical calculations show that reasonable blade sweepback can change the radial component force of the acting force of the blades and airflow, control the pressure gradient distribution on the surfaces of the blades, reduce the flow loss and achieve the aim of improving the aerodynamic performance of the impeller machinery. The study on the sweep blade mainly focuses on sweep in the top and stem regions of the blade body, while the study on sweep in the whole blade height range, namely the specific shape of the gravity center stacking line, is not discussed much, and no consensus is obtained on what type of gravity center stacking line is selected and how to control the gravity center stacking line.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide an integrally formed curved and swept combined blade, an impeller and an axial flow fan, and solve the technical problem that the working efficiency of the axial flow fan for the mine is improved while the aerodynamic performance of the axial flow fan for the mine is reduced in the prior art.
In order to solve the technical problems, the utility model adopts the following technical scheme:
an integrally formed swept combined blade comprises an integrally formed blade body and a blade handle; the blade body comprises a blade body root, a blade body middle part and a blade body top; a petiole clamping groove is formed in the petiole, and a gravity center stacking line for controlling the shape of the blade body of the swept combined blade is a secondary Bezier curve; wherein,
the gravity center stacking line for controlling the shape of the blade body of the swept combined blade is projected in a circumferential plane to form a blade forward-bending control line, an x-y plane rectangular coordinate system is established in the circumferential plane, and x and y are respectively a horizontal coordinate and a vertical coordinate in the x-y plane rectangular coordinate system; in an x-y plane rectangular coordinate system, taking the intersection point of the gravity center of the root of the blade body and the blade shank as a coordinate origin, taking the tangential direction of an impeller where the blade is located as a horizontal coordinate x, and taking the radial direction of the blade as a vertical coordinate y;
in an x-y plane rectangular coordinate system, a blade forward-bending control line control equation is as follows:
Figure DEST_PATH_GDA0003393303160000021
Pxcontrolling the x-direction coordinate of the curve for the forward bending of the blade;
Pythe y-direction coordinate of the blade forward curve control curve is obtained;
r is the radial length of the blade;
alpha is a bending angle with the value range of 5-20 degrees;
t1is a Bezier function independent variable in a forward control line;
kxthe control parameter of the forward curve of the blade in the x direction is a value range of 0<kx<1.5；
kyThe value range of the y-direction control parameter of the blade forward bending control curve is 0<ky<1；
The gravity center stacking line for controlling the shape of the blade body of the swept combined blade is projected in an axial plane to form a blade forward-bending control line, a z-r plane rectangular coordinate system is established in the axial plane, and z and r are respectively a horizontal coordinate and a vertical coordinate in the z-r plane rectangular coordinate system; in a rectangular coordinate system of a z-r plane, taking the intersection point of the gravity center of the root of the blade body and the blade handle as a coordinate origin, taking the axial direction of the rotation center of the impeller in which the blade is parallel to as a horizontal coordinate z, and taking the radial direction of the blade as a vertical coordinate r;
in a rectangular coordinate system of a z-r plane, namely an axial plane, a control equation of a forward-swept control line of the blade is as follows:
Figure DEST_PATH_GDA0003393303160000031
in the formula,
Pza Z-direction coordinate of a forward-swept control curve of the blade;
Prthe direction coordinate of the forward-swept control curve r of the blade is shown;
r is the radial length of the blade;
beta is a sweep angle, and the value range is 5-15 degrees;
t2is a Bezier function independent variable in a forward sweep control line;
kzthe value range of the Z-direction control parameter of the forward-swept control curve of the blade is-1<kz<1；
krThe forward sweep control curve r direction control parameter of the blade is a value range of 0<kr<1。
The utility model also has the following technical characteristics:
for a swept combined blade with a blade length of 532mm,
the three parameters of the control equation of the forward bending control line of the blade are as follows:
α＝10°；
kx＝1.4；
ky＝0.6；
the three parameters of the control equation of the forward-swept control line of the blade are as follows:
β＝15°；
kz＝-0.6；
kr＝0.8。
the middle part of the blade body of the sweep-curved combined blade is positioned at 0.4 part of the blade body.
The sweep-bending combined blade is specifically an integrally formed aluminum alloy sweep-bending combined blade.
The thickness of the blade body of the curved and swept combined blade is gradually reduced from the front edge of the blade body to the rear edge of the blade body.
An impeller is formed by uniformly installing a plurality of curved and swept combined blades along the circumferential direction of a hub, a hub rotating shaft installation disc protruding forwards and backwards is arranged in the center of the hub, a hub rotating shaft installation hole is formed in the center of the hub rotating shaft installation disc, an annular web plate is arranged on the end face of the hub rotating shaft installation disc, and blade installation grooves are uniformly distributed in the annular web plate; the blade mounting disc is provided with a blade mounting hole which runs through the blade mounting disc and corresponds to the blade mounting groove towards the center of the hub, and a pin-shaped notch is formed in the blade mounting hole.
The sweep-bending combined blade is fixedly installed in the blade mounting hole through a hoop, the hoop comprises a first sub-hoop and a second sub-hoop, the first sub-hoop and the second sub-hoop are connected through a bolt, and a pin-shaped boss is arranged on the end face of the first sub-hoop.
An axial flow fan comprises an air duct, a motor and an impeller, wherein the air duct comprises an air inlet duct and an air outlet duct, the motor comprises a primary motor and a secondary motor, and the impeller comprises a primary impeller and a secondary impeller; the primary impeller is connected with a primary motor, the primary motor is arranged in a primary motor barrel, and the primary motor barrel is arranged in an air inlet barrel; the secondary impeller is connected with a secondary motor, the secondary motor is arranged in a secondary motor barrel, and the secondary motor barrel is arranged in the air outlet barrel; the secondary motor barrel is connected with the conical transition section motor barrel, the primary impeller and the secondary impeller are the impellers, and the primary impeller and the secondary impeller are arranged oppositely and rotate in opposite directions.
The number of the blades of the first-stage impeller is 10, and the number of the blades of the second-stage impeller is 9.
The hub rotating shaft mounting holes at the centers of the hubs of the first-stage impeller and the second-stage impeller are respectively and rotatably mounted on the first-stage motor and the second-stage motor; the primary motor and the secondary motor are both explosion-proof motors, and the primary motor barrel and the secondary motor barrel are connected with the air duct through rib plates.
Compared with the prior art, the utility model has the following technical effects:
the gravity center stacking line for controlling the blade body shape of the curved and swept combined blade is the curved and swept combined blade with the secondary Bezier curve, so that the radial force gradient of the blade and the secondary flow distribution along the blade height are effectively controlled, the boundary layer stacking is eliminated, the vortex convergence is avoided, the vortex noise is reduced, the pneumatic performance of the mining axial flow fan is improved, and the working efficiency of the mining axial flow fan is improved. Experiments prove that the full-pressure efficiency of the mining axial-flow fan provided by the utility model is 87%, and is improved by more than 5% compared with the full-pressure efficiency of the traditional mining axial-flow fan.
According to the utility model, the blade adopts the integrally formed swept combined blade, the swept combined orthogonal three-dimensional optimization design theoretical design is applied, the cross section of the blade is of a wing type, and the front edge of the blade is designed with a fillet, so that the reduction of the fatigue resistance of the blade caused by the sharp top of the blade body is avoided, the strength and the rigidity of the blade are improved, and the service life of the blade is prolonged.
(III) the blades of the swept-curved combined blade can be swept forward by 15 degrees to adjust the static pressure distribution of the suction surface at the top of the movable blade body, so that the pressure difference between the pressure surface and the suction surface is reduced, and the loss caused by the leakage vortex at the top of the blade body is reduced; by changing the static pressure distribution of the suction surface, the static pressure gradient from the middle part of the blade body to the top of the blade body is reduced, the radial secondary flow on the surface of the blade is weakened, the low-energy fluid at the top of the blade body is prevented from being accumulated, and the pneumatic performance and efficiency of the blade are improved.
(IV) the forward bending of the blades of the swept-curved combined blade changes the static pressure distribution at the lower end wall of the blade, reduces the suction surface adverse pressure gradient of the root part of the blade body, weakens the loss caused by circumferential secondary flow at the end wall of the root part of the blade body, enables the low-energy fluid at the root part of the blade body to migrate to the middle part of the blade body in advance, reduces the loss and airflow blockage caused by the accumulation of the low-energy fluid at the tail edge of the root part of the blade body, and improves the pneumatic performance and efficiency of the blade.
Drawings
Fig. 1 is a schematic structural view of an impeller.
Fig. 2 is a schematic view of a blade structure.
FIG. 3 is a schematic top view of a blade.
Fig. 4 is a schematic view of a clip structure.
FIG. 5 is a curve diagram of the x-y plane forward curvature of a swept combined blade.
FIG. 6 is a curve diagram of the z-r plane forward sweep of a swept combined blade.
Fig. 7 is a schematic structural diagram of a mining axial-flow fan.
The meaning of the individual reference symbols in the figures is: 1-blade body, 2-blade handle, 3-blade handle clamping groove, 4-sweep combined blade, 5-hub, 6-impeller, 7-hub rotating shaft mounting disc, 8-hub rotating shaft mounting hole, 9-annular web plate, 10-blade mounting groove, 11-blade mounting disc, 12-blade mounting hole, 13-pin-shaped notch, 14-hoop, 15-wind cone, 16-motor, 17-primary motor barrel, 18-secondary motor barrel, 19-conical transition section motor barrel and 20-ribbed plate.
101-blade root, 102-blade middle, 103-blade top, 104-blade leading edge, and 105-blade trailing edge.
601-first-stage impeller, 602-second-stage impeller.
1401-first sub-band, 1402-second sub-band, 1403-bolt, 1404-pin boss.
1501-air inlet cylinder, 1502-air outlet cylinder.
1601-primary motor, 1602-secondary motor.
The present invention will be explained in further detail with reference to examples.
Detailed Description
The gravity center stacking line for controlling the shape of the blade body of the curved and swept combined blade is a secondary Bezier curve; the gravity center stacking line for controlling the blade body shape of the sweep combined blade is projected in a circumferential plane to form a blade forward-bending control line, the gravity center stacking line for controlling the blade body shape of the sweep combined blade is projected in an axial plane to form a blade forward-sweeping control line, an x-y plane rectangular coordinate system is established in the circumferential plane, and x and y are respectively a horizontal coordinate and a vertical coordinate in the x-y plane rectangular coordinate system; in an x-y plane rectangular coordinate system, taking the intersection point of the gravity center of the root of the blade body and the blade shank as a coordinate origin, taking the tangential direction of an impeller where the blade is located as a horizontal coordinate x, and taking the radial direction of the blade as a vertical coordinate y; establishing a z-r plane rectangular coordinate system in an axial plane, wherein z and r are respectively an abscissa and an ordinate in the z-r plane rectangular coordinate system; in a rectangular coordinate system of a z-r plane, the intersection point of the gravity center of the root of the blade body and the blade shank is taken as a coordinate origin, the axial direction parallel to the rotation center of the impeller where the blade is located is taken as an abscissa z, and the radial direction of the blade is taken as an ordinate r.
The center of gravity stacking line, the circumferential plane and the axial plane are common knowledge in the art.
The line of the center of gravity is defined as a curve formed by the root of the blade body to the center of gravity of each section of the blade body top.
The circumferential plane is defined as a circumferential plane formed by the circumferential tangent of the impeller and the radial direction of the impeller, namely a plane which is perpendicular to the rotating central axis of the impeller and divides the thickness of the impeller.
The axial plane is defined as the axial plane formed by the axial direction of the impeller and the radial direction of the impeller, namely the plane which is parallel to the rotation central axis of the impeller and bisects the impeller.
As shown in fig. 5 and 6, the gravity center stacking line for controlling the blade body shape of the swept-curved composite blade is a quadratic Bezier curve, the starting point P1 of the gravity center stacking line is the intersection point of the blade body root gravity center and the blade shank, i.e. the starting point P1 is located at the coordinate origin on the x-y plane rectangular coordinate system, the point a is the middle part of the blade body, P2 is the gravity center at the top part of the blade body, P3 is the blade forward-curved control point, k is the blade forward-curved control pointxControl parameter, k, for the blade camber control point P3 in the x-directionyThe control parameter of the blade forward bending control point P3 in the y direction; p4 is the blade sweep forward control point, kzControl parameter, k, for the blade sweep forward control point P4 in the z-directionrIs the control parameter of the blade forward-swept control point P4 in the direction r. Introducing specific parameters of the blade: blade length R, bend angle alpha, sweep angle beta.
Under an x-y plane rectangular coordinate system, the coordinates of each point P1, P2 and P3 of the forward-curved blade are respectively as follows: p1(0, 0), P2(R sin alpha, R cos alpha), P3 (k)x R sinα、kyR cos α); under the rz-r plane rectangular coordinate system, the coordinates of each point P1, P2 and P4 of the forward-swept blade are respectively as follows: p1(0, 0), P2(R sin beta, R cos beta), P4 (k)z R sinβ、kzR cosβ)。
In an x-y plane rectangular coordinate system, a blade forward-bending control line control equation is as follows:
Figure DEST_PATH_GDA0003393303160000081
in a rectangular coordinate system of a z-r plane, the control equation of the forward-swept control line of the blade is as follows:
Figure DEST_PATH_GDA0003393303160000082
in the formula,
Pxcontrolling the x-direction coordinate of the curve for the forward bending of the blade;
Pythe y-direction coordinate of the blade forward curve control curve is obtained;
Pza Z-direction coordinate of a forward-swept control curve of the blade;
Prthe direction coordinate of the forward-swept control curve r of the blade is shown;
r is the radial length of the blade;
alpha is a bending angle with the value range of 5-20 degrees;
beta is a sweep angle, and the value range is 5-15 degrees;
t1is a Bezier function independent variable in a forward control line;
t2is a Bezier function independent variable in a forward sweep control line;
kxthe control parameter of the forward curve of the blade in the x direction is a value range of 0<kx<1.5；
kyThe value range of the y-direction control parameter of the blade forward bending control curve is 0<ky<1；
kzThe value range of the Z-direction control parameter of the forward-swept control curve of the blade is-1<kz<1；
krThe forward sweep control curve r direction control parameter of the blade is a value range of 0<kr<1。
All parts in the present invention are those known in the art, unless otherwise specified.
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
Example 1:
the embodiment provides an integrally formed swept combined blade, as shown in fig. 1 to 4, which comprises an integrally formed blade body 1 and a blade handle 2; the blade body 1 comprises a blade body root 101, a blade body middle part 102 and a blade body top part 103; a petiole clamping groove 3 is formed in the petiole 2, and a gravity center stacking line of the shape of the blade body 1 of the sweep-controlling combined blade 4 is a quadratic Bezier curve; wherein,
the gravity center stacking line for controlling the shape of the blade body 1 of the sweep combined blade 4 is projected in a circumferential plane to form a blade forward-bending control line, an x-y plane rectangular coordinate system is established in the circumferential plane, and x and y are respectively a horizontal coordinate and a vertical coordinate in the x-y plane rectangular coordinate system; in an x-y plane rectangular coordinate system, taking the intersection point of the gravity center of the root of the blade body and the blade shank as a coordinate origin, taking the tangential direction of an impeller where the blade is located as a horizontal coordinate x, and taking the radial direction of the blade as a vertical coordinate y;
in an x-y plane rectangular coordinate system, a blade forward-bending control line control equation is as follows:
Figure DEST_PATH_GDA0003393303160000101
Pxcontrolling the x-direction coordinate of the curve for the forward bending of the blade;
Pythe y-direction coordinate of the blade forward curve control curve is obtained;
r is the radial length of the blade;
alpha is a bending angle with the value range of 5-20 degrees;
t1is a Bezier function independent variable in a forward control line;
kxthe control parameter of the forward curve of the blade in the x direction is a value range of 0<kx<1.5；
kyThe value range of the y-direction control parameter of the blade forward bending control curve is 0<ky<1；
The gravity center integral line for controlling the shape of the blade body 1 of the sweep combined blade 4 is projected in an axial plane to form a blade forward-bending control line, a z-r plane rectangular coordinate system is established in the axial plane, and z and r are respectively an abscissa and an ordinate in the z-r plane rectangular coordinate system; in a rectangular coordinate system of a z-r plane, taking the intersection point of the gravity center of the root of the blade body and the blade handle as a coordinate origin, taking the axial direction of the rotation center of the impeller in which the blade is parallel to as a horizontal coordinate z, and taking the radial direction of the blade as a vertical coordinate r;
in a rectangular coordinate system of a z-r plane, namely an axial plane, a control equation of a forward-swept control line of the blade is as follows:
Figure DEST_PATH_GDA0003393303160000102
in the formula,
Pza Z-direction coordinate of a forward-swept control curve of the blade;
Prthe direction coordinate of the forward-swept control curve r of the blade is shown;
r is the radial length of the blade;
beta is a sweep angle, and the value range is 5-15 degrees;
t2is a Bezier function independent variable in a forward sweep control line;
kzthe value range of the Z-direction control parameter of the forward-swept control curve of the blade is-1<kz<1；
krThe forward sweep control curve r direction control parameter of the blade is a value range of 0<kr<1。
As a preferable mode of the present embodiment, for the sweep-down combination vane 4 having a vane length of 532mm,
the three parameters of the control equation of the forward bending control line of the blade are as follows:
α＝10°；
kx＝1.4；
ky＝0.6；
the three parameters of the control equation of the forward-swept control line of the blade are as follows:
β＝15°；
kz＝-0.6；
kr＝0.8。
as a preferable solution of this embodiment, the midship 102 of the swept-curved combined blade 4 is at 0.4 of the blade body.
As a preferable solution of this embodiment, the swept-curved composite blade 4 is specifically an integrally formed aluminum alloy swept-curved composite blade.
As a preferable solution of this embodiment, the thickness of the blade body 1 of the swept-curved combined blade 4 gradually decreases from the blade body leading edge 104 to the blade body trailing edge 105.
An impeller is characterized in that a plurality of curved and swept combined blades 4 are uniformly arranged along the circumferential direction of a hub 5 to form an impeller 6, a hub rotating shaft mounting disc 7 protruding forwards and backwards is arranged at the center of the hub 5, a hub rotating shaft mounting hole 8 is arranged at the center of the hub rotating shaft mounting disc 7, an annular web plate 9 is arranged on the end face of the hub rotating shaft mounting disc 7, and blade mounting grooves 10 are uniformly distributed on the annular web plate 9; the outer circle of the annular web plate 9 is provided with a blade mounting disc 11 protruding from the front and the back, the blade mounting disc 11 is provided with a blade mounting hole 12 which runs through the blade mounting disc 11 and corresponds to the blade mounting groove 10 towards the center of the hub 5, and the blade mounting hole 12 is provided with a pin-shaped notch 13.
As a preferable scheme of this embodiment, the swept-curved combined blade 4 is fixedly installed in the blade mounting hole 12 through a hoop 14, the hoop 14 includes a first sub-hoop 1401 and a second sub-hoop 1402, the first sub-hoop 1401 and the second sub-hoop 1402 are connected through a bolt 1403, and an end face of the first sub-hoop 1401 is provided with a pin-shaped boss 1404.
An axial flow fan comprises an air duct 15, a motor 16 and an impeller 6, wherein the air duct 15 comprises an air inlet duct 1501 and an air outlet duct 1502, the motor 16 comprises a primary motor 1601 and a secondary motor 1602, and the impeller 6 comprises a primary impeller 601 and a secondary impeller 602; the primary impeller 601 is connected with a primary motor 1601, the primary motor 1601 is installed in a primary motor barrel 17, and the primary motor barrel 17 is installed in an air inlet barrel 1501; the secondary impeller 602 is connected with a secondary motor 1602, the secondary motor 1602 is installed in the secondary motor barrel 18, and the secondary motor barrel 18 is installed in the air outlet barrel 1502; the secondary motor barrel 18 is connected with the conical transition section motor barrel 19, the primary impeller 601 and the secondary impeller 602 are impellers, and the primary impeller 601 and the secondary impeller 602 are oppositely arranged and rotate in opposite directions.
As a preferable mode of the present embodiment, the number of the blades of the primary impeller 601 is 10, and the number of the blades of the secondary impeller 602 is 9.
As a preferable solution of this embodiment, the hub rotating shaft mounting holes 8 at the centers of the hubs 5 of the primary impeller 601 and the secondary impeller 602 are rotatably mounted on the primary motor 1601 and the secondary motor 1602 respectively; the primary motor 1601 and the secondary motor 1602 are explosion-proof motors, and the primary motor barrel 17 and the secondary motor barrel 18 are connected with the air duct 15 through a rib plate 20.
According to the technical scheme, as shown in fig. 7, the distance between the first-stage impeller and the second-stage impeller is 30mm, and the clearance between the swept-curved combined blades mounted on the first-stage impeller and the second-stage impeller and the air duct is 3 mm.
The flow analysis is carried out on the mining axial-flow fan, the numerical simulation of the mining axial-flow fan is carried out in a standard atmospheric state, the flowing medium is air, the atmospheric pressure PA is 101325Pa, the ambient temperature TA is 25 ℃, the gas density rho is 1.185kg/m3, the altitude A is 0m, and the rotating speed n of the simulated fan is 590 rpm.
Compared with the existing mining axial-flow fan, the pneumatic noise caused by the blades is measured and tested under the condition that the silencer is not additionally arranged. Table 1 and table 2 show the sound pressure level test results of the integrally formed curved and swept combined blade axial flow fan for mine and the conventional axial flow fan for mine respectively:
TABLE 1 integrally formed axial-flow ventilator with curved and swept combined blades for mine (dB)
Figure DEST_PATH_GDA0003393303160000131
TABLE 2 Sound pressure level data (dB) of traditional mine axial-flow fan
Figure DEST_PATH_GDA0003393303160000132
Figure DEST_PATH_GDA0003393303160000141
The above tests can be compared, and under the condition that no silencer is additionally arranged, the noise of the traditional mining axial-flow fan with the integrally formed curved and swept combined blades is obviously reduced by about 10 decibels compared with the noise of the traditional mining axial-flow fan with the traditional blades.

Claims (10)

1.一种整体成型的弯掠组合叶片，包括整体成型的叶身(1)和叶柄(2)；所述的叶身(1)包括叶身根部(101)、叶身中部(102)和叶身顶部(103)；所述的叶柄(2)上设置有叶柄卡槽(3)，其特征在于，控制弯掠组合叶片(4)的叶身(1)形状的重心积叠线是二次Bezier曲线；其中，1. An integrally formed curved and swept combined blade, comprising an integrally formed blade body (1) and a petiole (2); the blade body (1) comprises a blade body root (101), a blade body middle (102) and The top of the blade body (103); the blade handle (2) is provided with a blade handle slot (3), characterized in that the center of gravity stacking line of the shape of the blade body (1) of the control blade (4) is two secondary Bezier curve; where, 控制弯掠组合叶片(4)的叶身(1)形状的重心积叠线在周向平面内投影为叶片前弯控制线，在周向平面内建立x-y平面直角坐标系，x和y分别为x-y平面直角坐标系内的横坐标和纵坐标；在x-y平面直角坐标系内，以叶身根部重心与叶柄的交点为坐标原点，以叶片所在的叶轮切向作为横坐标x，以叶片径向作为纵坐标y；The barycenter product line that controls the shape of the blade body (1) of the swept-sweep composite blade (4) is projected in the circumferential plane as the blade forward curve control line, and the x-y plane Cartesian coordinate system is established in the circumferential plane, where x and y are respectively The abscissa and ordinate in the x-y plane Cartesian coordinate system; in the x-y plane Cartesian coordinate system, take the intersection of the center of gravity of the blade body root and the petiole as the coordinate origin, take the tangential direction of the impeller where the blade is located as the abscissa x, and take the radial direction of the blade as the abscissa x as the ordinate y; 在x-y平面直角坐标系内，叶片前弯控制线控制方程为：In the x-y plane Cartesian coordinate system, the governing equation of the blade forward curve control line is:
Figure DEST_PATH_FDA0003393303150000011
Figure DEST_PATH_FDA0003393303150000011
 Px为叶片前弯控制曲线x方向坐标；P x is the x-direction coordinate of the blade forward curve control curve; Py为叶片前弯控制曲线y方向坐标；P y is the y-direction coordinate of the blade forward curve control curve; R为叶片径向长度；R is the radial length of the blade; α为弯角，取值范围为5°～20°；α is the bending angle, the value range is 5°～20°; t1为前弯控制线中Bezier函数自变量；t 1 is the independent variable of the Bezier function in the forward curve control line; kx为叶片前弯控制曲线x方向控制参数，取值范围为0<kx<1.5；k x is the control parameter of the blade forward bending control curve x direction, the value range is 0<k x <1.5; ky为叶片前弯控制曲线y方向控制参数，取值范围为0<ky<1；k y is the y-direction control parameter of the blade forward curve control curve, and the value range is 0<k y <1; 控制弯掠组合叶片(4)的叶身(1)形状的重心积叠线在轴向平面内投影为叶片前弯控制线，在轴向平面内建立z-r平面直角坐标系，z和r分别为z-r平面直角坐标系内的横坐标和纵坐标；在z-r平面直角坐标系内，以叶身根部重心与叶柄的交点为坐标原点，以平行于叶片所在叶轮的旋转中心轴向作为横坐标z，以叶片径向作为纵坐标r；The center of gravity stacking line of the shape of the blade body (1) of the control blade (4) is projected in the axial plane as the blade forward curve control line, and the z-r plane Cartesian coordinate system is established in the axial plane, where z and r are respectively The abscissa and ordinate in the z-r plane Cartesian coordinate system; in the z-r plane Cartesian coordinate system, take the intersection of the center of gravity of the blade body root and the petiole as the coordinate origin, and take the axis parallel to the rotation center of the impeller where the blade is located as the abscissa z, Take the radial direction of the blade as the ordinate r; 在z-r平面直角坐标系即轴向平面内，叶片前掠控制线控制方程为：In the Cartesian coordinate system of the z-r plane, that is, the axial plane, the governing equation of the blade forward sweep control line is:
Figure DEST_PATH_FDA0003393303150000021
Figure DEST_PATH_FDA0003393303150000021
 式中，In the formula, Pz为叶片前掠控制曲线z方向坐标；P z is the z-direction coordinate of the blade forward sweep control curve; Pr为叶片前掠控制曲线r方向坐标；P r is the coordinate of blade forward sweep control curve r direction; R为叶片径向长度；R is the radial length of the blade; β为掠角，取值范围为5°～15°；β is the sweep angle, the value range is 5°～15°; t2为前掠控制线中Bezier函数自变量；t 2 is the independent variable of the Bezier function in the forward sweep control line; kz为叶片前掠控制曲线z方向控制参数，取值范围为-1<kz<1；k z is the z-direction control parameter of the blade forward sweep control curve, the value range is -1<k z <1; kr为叶片前掠控制曲线r方向控制参数，取值范围为0<kr<1。k r is the control parameter of the blade forward sweep control curve r direction, and the value range is 0<k r <1. 2.如权利要求1所述的整体成型的弯掠组合叶片，其特征在于，对于叶片径向长度为532mm的弯掠组合叶片(4)，2. The integrally formed curved and swept composite blade according to claim 1, characterized in that, for the curved and swept composite blade (4) with a radial length of 532 mm, 所述的叶片前弯控制线控制方程的三个参数为：The three parameters of the control equation of the blade forward curve control line are: α＝10°；α=10°; kx＝1.4；k x = 1.4; ky＝0.6； ky = 0.6; 所述的叶片前掠控制线控制方程的三个参数为：The three parameters of the control equation of the blade forward sweep control line are: β＝15°；β=15°; kz＝-0.6；k z = -0.6; kr＝0.8。k r =0.8. 3.如权利要求2所述的整体成型的弯掠组合叶片，其特征在于，所述的弯掠组合叶片(4)的叶身中部(102)在叶身(1)的0.4处。3. The integrally formed curved and swept combined blade according to claim 2, characterized in that, the middle part (102) of the blade body of the said curved and swept combined blade (4) is at 0.4 of the blade body (1). 4.如权利要求3所述的整体成型的弯掠组合叶片，其特征在于，所述的弯掠组合叶片(4)具体为整体成型的铝合金弯掠组合叶片。4. The integrally formed curved and swept composite blade according to claim 3, characterized in that, the said curved and swept composite blade (4) is specifically an integrally formed aluminum alloy curved and swept composite blade. 5.如权利要求4所述的整体成型的弯掠组合叶片，其特征在于，所述的弯掠组合叶片(4)的叶身(1)厚度由叶身前缘(104)到叶身后缘(105)逐渐递减。5. The integrally formed curved and swept composite blade according to claim 4, wherein the thickness of the blade body (1) of the said curved and swept composite blade (4) is from the blade body leading edge (104) to the blade body trailing edge (105) gradually decrease. 6.一种叶轮，其特征在于，由多个如权利要求5所述的弯掠组合叶片(4)沿轮毂(5)周向均匀安装构成叶轮(6)，轮毂(5)的中心设置有前后凸出的轮毂转动轴安装盘(7)，轮毂转动轴安装盘(7)的中心设置有轮毂转动轴安装孔(8)，轮毂转动轴安装盘(7)的端面上设置有环形腹板(9)，环形腹板(9)上设置有均匀分布的叶片安装槽(10)；所述的环形腹板(9)外圆设置有前后凸出的叶片安装盘(11)，所述的叶片安装盘(11)上向轮毂(5)中心开设有贯通叶片安装盘(11)并与叶片安装槽(10)相对应的叶片安装孔(12)，叶片安装孔(12)上设置有销形缺口(13)。6. An impeller, characterized in that the impeller (6) is formed by a plurality of curved and swept composite blades (4) as claimed in claim 5, which are evenly installed along the circumferential direction of the hub (5), and the center of the hub (5) is provided with The hub rotating shaft mounting plate (7) protruding from the front and the rear, the center of the hub rotating shaft mounting plate (7) is provided with a hub rotating shaft mounting hole (8), and the end face of the wheel hub rotating shaft mounting plate (7) is provided with an annular web plate (9), the annular web (9) is provided with evenly distributed blade installation grooves (10); the outer circumference of the annular web (9) is provided with front and rear protruding blade installation discs (11), the The blade mounting plate (11) is provided with a blade mounting hole (12) extending through the blade mounting disk (11) and corresponding to the blade mounting groove (10) toward the center of the hub (5), and the blade mounting hole (12) is provided with a pin shaped notch (13). 7.如权利要求6所述的叶轮，其特征在于，所述的弯掠组合叶片(4)通过卡箍(14)固定安装在叶片安装孔(12)内，所述的卡箍(14)包括第一子箍(1401)和第二子箍(1402)，第一子箍(1401)和第二子箍(1402)通过螺栓(1403)连接，第一子箍(1401)的端面上设置有一个销形凸台(1404)。7. The impeller according to claim 6, wherein the curved and swept combined blade (4) is fixedly installed in the blade mounting hole (12) through a clamp (14), and the clamp (14) It includes a first sub-clamp (1401) and a second sub-clamp (1402), the first sub-clamp (1401) and the second sub-clamp (1402) are connected by bolts (1403), and the end surface of the first sub-clamp (1401) is provided with There is a pin boss (1404). 8.一种轴流通风机，包括风筒(15)、电机(16)和叶轮(6)，所述的风筒(15)包括进风筒(1501)和出风筒(1502)，所述的电机(16)包括一级电机(1601)和二级电机(1602)，所述的叶轮(6)包括一级叶轮(601)和二级叶轮(602)；所述的一级叶轮(601)和一级电机(1601)相连接，所述的一级电机(1601)安装在一级电机筒(17)内，一级电机筒(17)安装在进风筒(1501)内；所述的二级叶轮(602)和二级电机(1602)相连接，所述的二级电机(1602)安装在二级电机筒(18)内，二级电机筒(18)安装在出风筒(1502)内；其特征在于，所述的二级电机筒(18)与圆锥形过渡段电机筒(19)相连接，所述的一级叶轮(601)和二级叶轮(602)为如权利要求7所述的叶轮(6)，所述的一级叶轮(601)和二级叶轮(602)相对设置，按相反方向旋转。8. An axial flow fan, comprising an air duct (15), a motor (16) and an impeller (6), the air duct (15) comprising an air inlet duct (1501) and an air outlet duct (1502), so The motor (16) includes a primary motor (1601) and a secondary motor (1602), and the impeller (6) includes a primary impeller (601) and a secondary impeller (602); the primary impeller ( 601) is connected with the primary motor (1601), the primary motor (1601) is installed in the primary motor cylinder (17), and the primary motor cylinder (17) is installed in the air inlet cylinder (1501); The secondary impeller (602) is connected with the secondary motor (1602), the secondary motor (1602) is installed in the secondary motor barrel (18), and the secondary motor barrel (18) is installed in the air outlet. (1502); it is characterized in that the secondary motor cylinder (18) is connected with the conical transition motor cylinder (19), and the primary impeller (601) and secondary impeller (602) are as follows The impeller (6) according to claim 7, wherein the first stage impeller (601) and the second stage impeller (602) are arranged opposite to each other and rotate in opposite directions. 9.如权利要求8所述的轴流通风机，其特征在于，所述的一级叶轮(601)的叶片数为10个，所述的二级叶轮(602)的叶片数为9个。9 . The axial flow fan according to claim 8 , wherein the number of blades of the primary impeller ( 601 ) is 10, and the number of blades of the secondary impeller ( 602 ) is 9. 10 . 10.如权利要求9所述的轴流通风机，其特征在于，所述的一级叶轮(601)和二级叶轮(602)的轮毂(5)中心的轮毂转动轴安装孔(8)分别转动式安装在一级电机(1601)和二级电机(1602)上；所述的一级电机(1601)和二级电机(1602)均为隔爆电动机，一级电机筒(17)和二级电机筒(18)通过肋板(20)与风筒(15)连接。10. The axial flow fan according to claim 9, characterized in that, the hub rotating shaft mounting holes (8) in the center of the hub (5) of the primary impeller (601) and the secondary impeller (602) are respectively The primary motor (1601) and the secondary motor (1602) are rotatably mounted on the primary motor (1601) and the secondary motor (1602); the primary motor (1601) and the secondary motor (1602) are both flameproof motors, and the primary motor barrel (17) and the secondary motor (1602) are all flameproof motors. The stage motor drum (18) is connected with the air drum (15) through the rib plate (20).
CN202120313080.1U 2021-02-03 2021-02-03 An integrally formed curved and swept combined blade, impeller and axial flow fan Active CN216044614U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120313080.1U CN216044614U (en) 2021-02-03 2021-02-03 An integrally formed curved and swept combined blade, impeller and axial flow fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120313080.1U CN216044614U (en) 2021-02-03 2021-02-03 An integrally formed curved and swept combined blade, impeller and axial flow fan

Publications (1)

Publication Number Publication Date
CN216044614U true CN216044614U (en) 2022-03-15

Family

ID=80596021

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120313080.1U Active CN216044614U (en) 2021-02-03 2021-02-03 An integrally formed curved and swept combined blade, impeller and axial flow fan

Country Status (1)

Country Link
CN (1) CN216044614U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112814943A (en) * 2021-02-03 2021-05-18 西安重装韩城煤矿机械有限公司 Integrally formed curved and swept combined blade, impeller and axial flow fan

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112814943A (en) * 2021-02-03 2021-05-18 西安重装韩城煤矿机械有限公司 Integrally formed curved and swept combined blade, impeller and axial flow fan
CN112814943B (en) * 2021-02-03 2024-11-12 西安重装韩城煤矿机械有限公司 An integrally formed curved and swept combined blade, impeller and axial flow fan

Similar Documents

Publication Publication Date Title
CN107061321B (en) Using the compressor of the variable asymmetric vaned diffuser of established angle and consistency coupling
CN106438470A (en) Axial-flow fan and refrigeration equipment
CN112814943B (en) An integrally formed curved and swept combined blade, impeller and axial flow fan
CN113175443B (en) High-efficiency, low-noise, volute-free, backward-facing centrifugal fan with three-way impeller
CN101598138A (en) Secondary splitter blade type centrifugal impeller
CN107061329A (en) A kind of axial flow blower
CN203783965U (en) Large-flow high-load axial-flow compressor used for 300MW F-grade heavy-duty gas turbine
CN106939902B (en) Energy-saving straight-wall front and rear disk variable-curvature curve element ternary impeller and centrifugal fan adopting same
CN113719471A (en) Noise-reduction centrifugal impeller with bionic type trailing edge blades for breathing machine
CN112974734B (en) Manufacturing method of integrally formed swept combined blade
CN113309736B (en) Blade, impeller, centrifugal fan, range hood and blade design method
CN111878455B (en) Centrifugal impeller, centrifugal fan and refrigeration equipment
CN110939601A (en) Turbocharger compressor impeller with high-performance blades
CN207554416U (en) A kind of centrifugal impeller of splitterr vanes
CN216044614U (en) An integrally formed curved and swept combined blade, impeller and axial flow fan
CN110608196B (en) Wedge-shaped diffuser with half-blade high and small blades
CN108953222B (en) Centrifugal impeller
CN215293004U (en) A blade, impeller, centrifugal fan and range hood
CN108757568B (en) Axial fan blade
CN203584898U (en) Low-noise high-efficiency central air conditioner outdoor machine cooling axial-flow fan
CN114909325A (en) Low-noise axial flow fan blade and axial flow fan
CN101092970A (en) New type single stage transonic axial fan
CN114607641B (en) Guide vane structure of axial flow fan and axial flow fan
CN117605707A (en) A centrifugal fan impeller with a vortex generator structure
CN204553344U (en) Double-sucking type centrifugal blower

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant