CN209494760U - A kind of draught fan impeller - Google Patents

Abstract

The utility model discloses a kind of draught fan impellers, including substrate, the side of the substrate is vertically installed with blade, the blade is provided with several pieces along the center of circle circumference array of the substrate, the blade is arc-shaped, the arc core of the blade is in the substrate, the proximal part of the blade is inlet angle, the distal end of the blade is the angle of outlet, the line in the angle of outlet to the substrate center of circle is telecentricity radius, it is A that the vertical line of the tangent line of the angle of outlet and the telecentricity radius, which is formed by angle, the range of the A is 148 degree to 152 degree, the arc radius of the blade is R, the arc length of the blade is L, the diameter of the substrate is D, the distance in the arc core of the blade to the substrate center of circle is r, R:D=0.45~0.47, L:D=0.4~0.42, r:D=0 .225~0.235, the utility model uses long runner, mellow and fullization blade, and structure configuration is more reasonable between adjacent blades, effectively improves the outlet air efficiency of blade, reduces noise.

Description

A kind of draught fan impeller

Technical field

The utility model relates to a kind of draught fan impellers.

Background technique

Existing fan blade mostly uses straight-plate-type to design, or designs for small arc panel, and the runner that blade is formed is shorter, Intake is difficult to improve, and the structure setting between blade is unreasonable, is easy to cause the gas-flow resistance of blade larger, after outlet Blade is easy to happen " surge " phenomenon, caused by noise it is larger, long-term work connection structure is easy to produce loosening, needed for reach It is more powerful under air quantity.

Utility model content

Technical problem to be solved by the utility model is: need a kind of draught fan impeller, it can reduce generating when blade rotation Resistance improves working efficiency, and reduces the noise generated when operation, improves the stability of structure.

The solution that the utility model solves its technical problem is: a kind of draught fan impeller, including substrate, the substrate Side is vertically installed with blade, and the blade is provided with several pieces along the center of circle circumference array of the substrate, and the blade is circle Arcuation, for the arc core of the blade in the substrate, the proximal part of the blade is inlet angle, and the distal end of the blade is The line of bicker, the angle of outlet to the substrate center of circle is telecentricity radius, and the telecentricity radius is fitted the fitting circle to be formed Diameter is less than the diameter of the substrate, and it is A that the vertical line of the tangent line of the angle of outlet and the telecentricity radius, which is formed by angle, institute The range for stating A is 148 degree to 152 degree, and the arc radius of the blade is R, and the arc length of the blade is L, the substrate it is straight Diameter is D, and the distance in arc core to the substrate center of circle of the blade is r, R:D=0.45~0.47, L:D=0.4~0.42, r: D=0.225~0.235.

As a further improvement of the above technical scheme, the tangent line of the inlet angle of blade described in any block blade adjacent thereto The distance between the tangent line of the angle of outlet be runner exit width, the value of the runner exit width is d, L:d=2.96.

As a further improvement of the above technical scheme, A is 152 degree.

As a further improvement of the above technical scheme, R:D=0.466.

As a further improvement of the above technical scheme, L:D=0.415.

As a further improvement of the above technical scheme, r:D=0.233.

As a further improvement of the above technical scheme, the blade is provided with shroud far from one end of the substrate, institute Stating shroud is rotary structure, and the bus of the shroud is arc-shaped, and the outer diameter of the shroud is along the shroud to the substrate Direction be gradually increased.

As a further improvement of the above technical scheme, the arc radius of the shroud bus is M, R:M=2.74.

The beneficial effects of the utility model are: effectively reducing blower resistance, and extend using the fan blade of spherical arc shape Runner increase gas energizer can, avoid the phenomenon that outlet hypsokinesis blade generates " surge ", production when reducing blower operating Raw noise reduces power consumption, and the shroud of blower equally uses circular-arc-shaped design, further reduced blower resistance, it is ensured that Air-flow through in air inlet space it is unobstructed efficiently, it is mating and useless to can be applied to environment protection ventilating, spraying spray painting dedusting, oil smoke staticizer Gas disposal etc..

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described.Obviously, described attached drawing is a part of the embodiment of the utility model, rather than complete Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it His design scheme and attached drawing.

Fig. 1 is the substrate of the utility model, blade schematic elevation view.

Fig. 2 is the whole schematic side view of the utility model.

In figure: 1- substrate, 2- blade, 3- shroud, 4- enter the wind cylinder.

Specific embodiment

It is carried out below with reference to technical effect of the embodiment and attached drawing to the design of the utility model, specific structure and generation It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field Art personnel other embodiments obtained without creative efforts belong to the model of the utility model protection It encloses.In addition, all connection relationships being previously mentioned in text, not singly refer to that component directly connects, and referring to can be according to specific implementation feelings Condition, by adding or reducing connection auxiliary, Lai Zucheng more preferably connection structure.Each technical characteristic in the invention, It can be with combination of interactions under the premise of not conflicting conflict.

Referring to Fig.1, Fig. 2, a kind of draught fan impeller, including substrate 1, the side of the substrate 1 are vertically installed with blade 2, institute It states blade 2 and the center of circle circumference array of the substrate 1 is provided with several pieces, the blade 2 is arc-shaped, the arc of the blade 2 For the heart in the substrate 1, the proximal part of the blade 2 is inlet angle, and the distal end of the blade 2 is the angle of outlet, the outlet The line in angle to 1 center of circle of substrate is telecentricity radius, and the telecentricity radius is fitted the fitting diameter of a circle to be formed less than described It is A that the vertical line of the diameter of substrate 1, the tangent line of the angle of outlet and the telecentricity radius, which is formed by angle, and the range of the A is 148 degree to 152 degree, the arc radius of the blade 2 is R, and the arc length of the blade 2 is L, and the diameter of the substrate 1 is D, institute The distance for stating arc core to 1 center of circle of substrate of blade 2 is r, R:D=0.45~0.47, L:D=0.4~0.42, r:D= 0.225~0.235, the utility model is in the arc-shaped by the design of 2 full wafer of blade, and the design position for blade 2 on substrate 1 It sets also required by having, it is A that the tangent line of the angle of outlet, which is formed by angle with the vertical line of telecentricity radius, and the arc radius of blade 2 is R, The arc length of blade 2 is L, and the diameter of substrate 1 is D, and the distance in arc core to the center of circle of substrate 1 of blade 2 is r, these numerical definiteness In, length unit is unified, according to the ratio of the arc radius R of blade 2 and 1 diameter D of substrate in the range of 0.45~0.47, The value that can determine the arc radius R of blade 2, according to the ratio of the arc length L of the blade 2 and diameter D of substrate 1 in 0.4~0.42 model In enclosing, it may be determined that the arc length of blade 2 is limited according to the ratio of distance r and 5 diameter of substrate in the range of 0.225~0.235 The position of blade 2 on substrate 1, telecentricity radius is fitted the diameter that the fitting diameter of a circle to be formed is less than substrate 1, so that outlet Angle is formed by included angle A in 148 to 152 degree in substrate 1, then through the vertical line of restriction angle of outlet tangent line and telecentricity radius always In the range of, it may be determined that the swing angle of blade 2 on substrate 1 so far can determine the structure setting of blade 2 on substrate 1, circle The blade 2 of arc reduces gas-flow resistance, avoids outlet hypsokinesis blade 2 and generates " surge " phenomenon, when reducing fan operation Noise, lengthening blade 2 design increase gas energizer can, make gas intake increase, it can be achieved that being gone out on an equal basis In the case where air quantity, power required for blower is less, realizes efficient outlet air.

It is further used as preferred embodiment, the blade 2 adjacent thereto of the tangent line of the inlet angle of blade 2 described in any block The distance between tangent line of the angle of outlet is runner exit width, and the value of the runner exit width is d, L:d=2.96, according to L With the ratio of d, that is, it can determine the quantity that blade 2 is arranged, blade 2 is provided with 8 pieces under this ratio, and structure is more reasonable, further Improve intake.

It is further used as preferred embodiment, A is 152 degree, R:D=0.466, L:D=0.415, r:D=0.233, this It is designed for optimal structure.

It is further used as preferred embodiment, the blade 2 is provided with shroud 3 far from one end of the substrate 1, described Shroud 3 is rotary structure, and the bus of the shroud 3 is arc-shaped, and the outer diameter of the shroud 3 arrives the base along the shroud 3 The direction of plate 1 is gradually increased, and the shroud 3 of arc keeps gas-flow resistance smaller.

It is further used as preferred embodiment, the shroud 3 is provided with air inlet cylinder 4, institute far from one end of the blade 2 Stating air inlet cylinder 4 is rotary structure, the arc that the bus of the air inlet cylinder 4 includes flat segments, is connected with described flat segments one end Shape section, the center of circle of the segmental arc are set to the outside of the air inlet cylinder 4, and the segmental arc is stretched far from one end of the flat segments Enter in the shroud 3, the structure design of flat segments may make air inlet cylinder 4 more easily to install, can using the air inlet cylinder 4 of arc Further decrease inflow noise, reduce gas-flow resistance, reduce vortex and return loss so that air-flow enter it is more unobstructed when impeller Efficiently.

It is further used as preferred embodiment, the arc radius of 3 bus of shroud is M, R:M=2.74, the arc The arc radius of shape section is N, R:N=2.74, this is designed for optimal structure.

In order to further verify the working effect of blower, carry out first group of experiment test, to it is existing using straight-plate-type and The draught fan impeller of short runner is tested, it is connect with 8 kinds of air ducts, 8 kinds of different operating conditions is obtained, obtains experimental data such as table Shown in 1:

Table 1:

Using arc-shaped blade, and R:D=0.45 is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, It is as shown in table 2 to obtain experimental data:

Table 2:

Using arc-shaped blade, and R:D=0.46 is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, It is as shown in table 3 to obtain experimental data:

Table 3:

Using arc-shaped blade, and R:D=0.466 is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different works It is as shown in table 4 to obtain experimental data for condition:

Table 4:

Using arc-shaped blade, and R:D=0.47 is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, It is as shown in table 3 to obtain experimental data:

Table 5:

By upper 1~table of table 5 it is found that with straight-plate-type, short runner fan blade compared with, using after arc-shaped blade, The quiet efficiency of the axis of blower is opposite to be improved, and impeller power, than A sound level relative reduction, therefore circular arc vane is more straight than traditional Plate blade it is more efficient, under identical air output, power consumption is lower, and noise is less, then 2~table of contrast table 5 it is found that It is between 0.45~0.466 in R:D, the quiet efficiency of axis is in the trend risen, and impeller power is in downward trend, under being in than A sound level The trend of drop, but when R:D is 0.47, when opposite R:D is 0.466, the quiet efficiency relative drop of axis, impeller power relative increase, It is held essentially constant than A sound level, is at this time the optimal value of structure when R:D is 0.466 therefore.

On the basis of keeping R:D is 0.466, change the ratio of L and D, carries out second group of experiment measurement, take L:D= 0.4, it is connect with 8 kinds of air ducts, 8 kinds of different operating conditions is obtained, it is as shown in table 6 to obtain experimental data:

Table 6:

L:D=0.41 is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, obtains experimental data such as 7 institute of table Show:

Table 7:

L:D=0.415 is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, obtains experimental data such as 8 institute of table Show:

Table 8:

L:D=0.42 is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, obtains experimental data such as 9 institute of table Show:

Table 9:

By 6~table of table 9 it is found that being between 0.4~0.415 in L:D, the quiet efficiency of axis is in the trend risen, impeller power Downward trend is in downward trend than A sound level, and the efficiency of blower is in the trend being continuously improved, but when L:D is 0.42, phase When being 0.415 to L:D, the quiet efficiency relative drop of axis, impeller power relative increase is held essentially constant than A sound level, therefore, when It is at this time the optimal value of structure when L:D is 0.415.

On the basis of holding R:D is 0.466, L:D is 0.415, change the ratio of R and r, carries out the experiment of third group and survey Amount, takes r:D=0.225, it is connect with 8 kinds of air ducts, 8 kinds of different operating conditions is obtained, it is as shown in table 10 to obtain experimental data:

Table 10:

R:D=0.23 is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, obtains experimental data such as 11 institute of table Show:

Table 11:

R:D=0.233 is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, obtains experimental data such as 12 institute of table Show:

Table 12:

R:D=0.235 is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, obtains experimental data such as 13 institute of table Show:

Table 13:

By table 10~13 it is found that in r:D between 0.225~0.235, the quiet efficiency of axis is in the trend risen, impeller power It is in downward trend than A sound level in downward trend, the efficiency of blower theoretically takes r:D=in the trend being continuously improved When 0.235, fan efficiency is optimal value, but in actual production, when taking r:D=0.235, due to blade basal disc more The position at edge, in impeller high-speed rotation, the centrifugal force of blade is larger, is easy to cause the unstable of structure, and works as and take r:D= When 0.233, blade had both kept higher outlet air efficiency, and did not influenced the stability of structure, and when wheel rotation is maintained at steady State be therefore optimal value when taking r:D=0.233 from the aspect of Comprehensive service life and structural stability.

To keep R:D be 0.466, L:D 0.415, on the basis of taking r:D=0.233, change the tangent line of the angle of outlet and remote The vertical line of heart radius is formed by the range of included angle A, carries out the 4th group of experiment measurement, takes A=148 degree, it is connected with 8 kinds of air ducts It connects, obtains 8 kinds of different operating conditions, it is as shown in table 14 to obtain experimental data:

Table 14:

A=150 degree is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, obtains experimental data such as 15 institute of table Show:

Table 15:

A=152 degree is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, obtains experimental data such as 16 institute of table Show:

Table 16:

A=153 degree is taken, it is connect with 8 kinds of air ducts, obtains 8 kinds of different operating conditions, obtains experimental data such as 17 institute of table Show:

Table 17:

By 14~table of table 17 it is found that in A between 148~152 degree, the quiet efficiency of axis is in the trend risen, impeller power Downward trend is in downward trend than A sound level, and the efficiency of blower is in the trend being continuously improved, but when A is 153 degree, relatively When A is 152 degree, since total pressure is in downward trend in impeller, also relative reduction, the quiet efficiency relative drop of axis cause shaft efficiency Impeller power relative increase, is held essentially constant than A sound level, is at this time the optimal value of structure when A is 152 degree therefore.

The length unit of above four groups of experiments is unified for CM.

In conclusion the experiment in conjunction with first group to the 4th group measures, by change the radian of blade, blade arc length, Position of the blade on substrate, blade swing angle, obtain and work as R:D=0.466, L:D=0.415, r:D=0.233, A= At 152 degree, the structure of draught fan impeller is optimal, and effectively reduces blower resistance, and extend runner, makes gas energizer It can increase, avoid the phenomenon that outlet hypsokinesis blade generates " surge ", reduce the noise generated when blower operating, reduce function Consumption, and the shroud of blower, air inlet cylinder equally use circular-arc-shaped design, and R:M 2.74, R:N 2.74 further reduced wind Machine resistance not only reduces inflow noise, also reduces vortex and return loss, it is ensured that air-flow passes through the unobstructed height for entering the wind interior space Effect, more other same model centrifugal fan products, increase blower is directly proportional per hour, and fan efficiency reaches 88%, mating electricity The power of machine is small, and lower than the noise of similar blower 10~15%, it can be applied to environment protection ventilating, spraying spray painting dedusting, oil smoke staticize Device is mating and exhaust-gas treatment etc..

The better embodiment of the utility model is illustrated above, but the invention be not limited to it is described Embodiment, those skilled in the art can also make various equivalent changes without departing from the spirit of the present invention Type or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.

Claims (8)

1. a kind of draught fan impeller, it is characterised in that: including substrate (1), the side of the substrate (1) is vertically installed with blade (2), The blade (2) is provided with several pieces along the center of circle circumference array of the substrate (1), and the blade (2) is arc-shaped, the leaf The arc core of piece (2) is in the substrate (1), and the proximal part of the blade (2) is inlet angle, and the distal end of the blade (2) is The line of the angle of outlet, the angle of outlet to the substrate (1) center of circle is telecentricity radius, and the telecentricity radius is fitted the fitting to be formed Diameter of a circle is less than the diameter of the substrate (1), and the tangent line of the angle of outlet and the vertical line of the telecentricity radius are formed by folder Angle is A, and the range of the A is 148 degree to 152 degree, and the arc radius of the blade (2) is R, and the arc length of the blade (2) is L, the diameter of the substrate (1) are D, and the distance in arc core to the substrate (1) center of circle of the blade (2) is r, R:D=0.45 ~0.47, L:D=0.4~0.42, r:D=0.225~0.235.

2. a kind of draught fan impeller according to claim 1, it is characterised in that: the inlet angle of blade described in any block (2) The distance between tangent line of the angle of outlet of tangent line blade adjacent thereto (2) is runner exit width, the runner exit width Value is d, L:d=2.96.

3. a kind of draught fan impeller according to claim 2, it is characterised in that: A is 152 degree.

4. a kind of draught fan impeller according to claim 2, it is characterised in that: R:D=0.466.

5. a kind of draught fan impeller according to claim 2, it is characterised in that: L:D=0.415.

6. a kind of draught fan impeller according to claim 2, it is characterised in that: r:D=0.233.

7. a kind of draught fan impeller according to claim 1, it is characterised in that: the blade (2) is far from the substrate (1) One end is provided with shroud (3), and the shroud (3) is rotary structure, and the bus of the shroud (3) is arc-shaped, the shroud (3) outer diameter is gradually increased along the direction of the shroud (3) to the substrate (1).

8. a kind of draught fan impeller according to claim 7, it is characterised in that: the arc radius of shroud (3) bus is M, R:M=2.74.