CN103161755A

CN103161755A - Industrial blower impeller

Info

Publication number: CN103161755A
Application number: CN2011104255241A
Authority: CN
Inventors: 詹卢卡·阿根蒂尼; 斯特法诺·贝尔纳迪
Original assignee: RIELLO HEATING EQUIPMENT (SHANGHAI) CO Ltd
Current assignee: RIELLO HEATING EQUIPMENT (SHANGHAI) CO Ltd
Priority date: 2011-12-16
Filing date: 2011-12-16
Publication date: 2013-06-19
Anticipated expiration: 2031-12-16
Also published as: CN103161755B

Abstract

The invention discloses an industrial blower impeller. The industrial blower impeller (10) is provided with a plurality of vanes (13) between a discoid piece (11) and an annular ring (14). A contour of each vane (13) is confirmed by two cubic spline curves ((S1), (S2)), and each spline curves is defined through four datum points. The two spline curves ((S1), (S2)) share a point ((P)), and the two spline curves ((S1), (S2)) are built to enable a tangent (first derivative of interpolation function) value and a curvature (second derivative) value on the shared point to be continuous.

Description

The industrial use fan impeller

Technical field

The present invention relates to a kind of industrial use fan impeller (industrial fan impeller).

The present invention advantageously but be not to can be used on uniquely in the fan of working together with burner (burner).

Background technique

As everyone knows, the industrial use fan impeller is provided with a plurality of blades that are contained between two end members (for example discoid and ring part).

Yet, belonging to the defective that the blast fan of prior art exists and be, there is micro-turbulence in the incorrect design due to blade profile in blade path, and this micro-turbulence affects the efficient of fan.

Summary of the invention

Therefore, main purpose of the present invention is, a kind of industrial use fan impeller that greatly reduces the micro-turbulence in blade path is provided.

An object of the present invention is to provide a kind of blast fan with efficient blade profile, and described blast fan is cheap simultaneously and is easy to make.

According to the present invention, a kind of industrial use fan impeller is provided, it is characterized in that, comprise at least one blade, the profile of described blade determines by two cubic spline curves, every batten curve all defines by four reference points; Described two batten curves have a point, and are built into that to make tangent line value and curvature value be continuous at described some place, and described tangent line value is the first derivative of interpolation function, and described curvature value is the second dervative of interpolation function.

Further, impeller according to the present invention is characterised in that, comprises discoid and a plurality of blades between the ring part at the other end place being contained at an end place; Described discoid has hub.

Further, impeller according to the present invention is characterised in that, the first straight line and the second lineal shape at an angle of 90, described the first straight line is through intermediate point, tangent and top described blade is located thereon with the circle that limits by the outer leafs radius, described outer leafs radius is positioned on described the second straight line.

Further, impeller according to the present invention is characterised in that, the 3rd straight line that is located thereon by the intra vane radius with and the crossing formed angle of tangent the 4th straight line of the profile of described blade be 45 °; And the bottom of described blade is positioned on the blade camber line vertical with described the 3rd straight line substantially.

Further, impeller according to the present invention is characterised in that, for the laminar flow effect of the best, described intra vane radius equals 3/4ths of described outer leafs radius.

Further, impeller according to the present invention is characterised in that, the sum of described blade is a prime number.

Further, impeller according to the present invention is characterised in that, described impeller is made by metal or plastics.

Description of drawings

In the mode of example, embodiment of the present invention preferred, indefiniteness is described with reference to accompanying drawing, in accompanying drawing:

Fig. 1 shows according to the outline drawing of the blast fan of instruction of the present invention (overall drawing);

Fig. 2 shows the perspective view of the impeller blade of Fig. 1;

Fig. 3 shows the front view of the blade of Fig. 2;

Fig. 4 shows the profilogram of the blade of Fig. 1, Fig. 2 and Fig. 3;

Fig. 5 shows the method for end of the blade of depiction 1, Fig. 2, Fig. 3 and Fig. 4.

Embodiment

Label 10 in Fig. 1 represents on the whole according to blast fan of the present invention.

Impeller 10 comprises:

(a) discoid (disk) 11, how much pedestals of other parts are supported in this discoid representative, and are by being fixed to the mechanical rotary device that makes its rotation with the live axle (not shown) of discoid 11 all-in-one-piece hubs (hub) 12;

(b) a plurality of blades 13, when they rotated, described a plurality of blades produced from central suction district to impeller the air-flow of 10 outside;

(c) annular ring (annular ring) 14, the annular ring support blade with discoid 11 relative ends, and structurally reinforce impeller 10 simultaneously.That is to say, blade 13 dress (pack) is at discoid 11 on the first side and between the annular ring 14 on the second side.

As Fig. 1, Fig. 2 and shown in Figure 3, impeller 10 rotates (ROT) in the counterclockwise direction.

Impeller 10 is characterised in that blade 13 makes as a whole distribution and geometrical construction.Shown example has nineteen blade 13, and this is a prime number, compares with the blade 13 of non-prime number, produces still less intrinsic sound and mesomerism frequency.

The shape of blade 13 (Fig. 4) is determined by the hydrokinetics numerical analysis, with the laminar flow in the blade path of improvement between adjacent blades 13 and the energy efficiency of ventilation system; And the profile of each blade 13 all comes definite by two cubic spline curves (third-degree spline curve), every batten curve all defines by four reference points, as shown in Figure 4.Article two, curve (S ₁) and (S ₂) have a point (P), and be built into that to make tangent line (first derivative of interpolation function) value and curvature (second dervative) value locate at point (P) be continuous, and geometric profile track and laminar flow track do not have to cause the interruption of micro-turbulence in blade path.

As shown in Figure 5, advantageously, through intermediate point (P1), straight line (σ) shape that be located thereon with the straight line (t1) that circle is tangent and top 13A blade 13 is located thereon of describing by outer leafs radius (R) and outer leafs radius (R) (α) at an angle of 90.

The straight line (γ) that is located thereon by intra vane radius (r) with and the crossing formed angle (β) of the tangent straight line (t2) of the profile of blade 13 be advantageously 45 °; And the bottom 13B of blade 13 is positioned on the blade camber line vertical with straight line (γ) substantially.

Test shows, when intra vane radius (r) approximate outer leafs radius (R) 3/4ths the time obtain best laminar flow effect.

Impeller 10 can be made by metal or plastics.

Be according to the major advantage of impeller of the present invention, greatly reduced the micro-turbulence in the blade path, otherwise this will reduce the efficient of fan.

Claims

1. an industrial use fan impeller (10), is characterized in that, comprises at least one blade (13), and the profile of described blade is by two cubic spline curve ((S ₁), (S ₂)) determine, every batten curve all defines by four reference points; Described two batten curve ((S ₁), (S ₂)) have a point ((P)), and be built into that to make tangent line value and curvature value locate at described point ((P)) be continuous, described tangent line value is the first derivative of interpolation function, described curvature value is the second dervative of described interpolation function.

2. impeller according to claim 1 (10), is characterized in that, comprises a plurality of blades (13) between the ring part (14) that is contained in discoid (11) that are positioned at an end place and is positioned at the other end place; Described discoid (11) have hub (12).

3. according to the described impeller of any one (10) in aforementioned claim, it is characterized in that, the first straight line ((t1)) and the second straight line ((σ)) shape be ((α)) at an angle of 90, described the first straight line is through intermediate point ((P1)), be located thereon with the top (13A) of the tangent and described blade of circle (13) by outer leafs radius ((R)) restriction, and described outer leafs radius ((R)) is positioned on described the second straight line ((σ)).

4. according to the described impeller of any one (10) in aforementioned claim, it is characterized in that, the 3rd straight line ((γ)) that is located thereon by intra vane radius ((r)) with and the crossing formed angle ((β)) of tangent the 4th straight line ((t2)) of the profile of described blade (13) be 45 °; And the bottom (13B) of described blade (13) is positioned on the blade camber line vertical with described the 3rd straight line ((γ)) substantially.

5. according to claim 3 or 4 described impellers (10), is characterized in that, for the laminar flow effect of the best, described intra vane radius ((r)) equals 3/4ths of described outer leafs radius ((R)).

6. according to the described impeller of any one (10) in aforementioned claim, it is characterized in that, the sum of described blade (13) is a prime number.

7. according to the described impeller of any one (10) in aforementioned claim, it is characterized in that, described impeller is made by metal or plastics.