CN101793263A - Design method of double-blade stamped non-clogging impeller - Google Patents

Abstract

The invention relates to a design method of a double-blade stamped non-clogging impeller. Compared with the double-blade non-block impeller designed by the traditional design method, the double-blade non-block impeller designed by the invention has the advantages of high non-block performance and high efficiency, and can meet the requirements of the stamping process for the geometric parameters of the impeller.

Description

A kind of design method of double-blade stamped non-clogging impeller

Technical field

The present invention relates to a kind of design method of non-varactor pump major part, refer in particular to a kind of design method of double-blade stamped non-clogging impeller.

Background technique

The Non-blinding pump impeller mainly is divided into common list (two) blade type, rotary flow type, list (two) flow channel type, helico-centrifugal pump formula, and the Non-blinding pump impeller of double leaf chip has the efficient height, and operating conditions is stable, and the processing and fabricating cost is low.At present, mainly there are following two problems in double-leaf non-clogging impeller design method: 1. it is poor that the non-clogging impeller of designing does not have plugging performance, can not satisfy and carry the demanding fluid of no plugging performance; 2. when the satisfied no plugging performance of impeller design required, the decrease in efficiency of impeller was a lot.Because the existence of design problem makes that double-leaf non-clogging impeller utilization scope is not extensive, only is used for carrying the less demanding fluid of no plugging performance.

Perfect along with stamping process, its utilization is in extensive range, and clear water punching type centrifugal pump design method is more perfect, and in the design of double-leaf punching press non-clogging impeller, does not have unified design method.

Summary of the invention

For addressing the above problem, the invention provides a kind of design method of double-blade stamped non-clogging impeller, it is good not have plugging performance with the double-blade stamped non-clogging impeller of the present invention design, the efficient height; Geometric parameter can satisfy the demand of impeller stamping process.

Realize that the above-mentioned purpose technological scheme is:

According to the centrifugal pump design theory, in conjunction with the test data of pump, the major parameter of impeller has been carried out statistical analysis, set up the formula of following impeller main geometric parameters design.

1. impeller inlet diameter D ₀

Formula is: D ₀=K ₀(Q/n) ^1/3

Its coefficient is: K ₀=3.5～4.0

2. impeller outer diameter D ₂

Formula is: $D_2=K_{D2}\sqrt{2\mathrm{gH}}/n$

Its coefficient is: K _D2=11.064 * n _s ^0.1242

3. impeller outlet width b ₂

Formula is: $b_2=K_{b2}\sqrt{2\mathrm{gH}}/n$

Its coefficient is: K _B2=0.03122 * n _s ^1.069

4. subtended angle of blade

Subtended angle of blade

Be generally: 170 °～190 °

In the above-mentioned formula: the flow of Q-design conditions, rice ³/ second;

The lift of H-design conditions, rice;

The n-wheel speed, rev/min;

n _sThe specific speed of-design pump;

D ₀-impeller inlet diameter, rice;

D ₂-impeller outer diameter, rice;

b ₂-impeller outlet width, rice.

It is good to the invention has the beneficial effects as follows that the double-blade stamped non-clogging impeller that designs with the present invention does not have plugging performance, and efficiency value also can reach requirement simultaneously.

Description of drawings

Fig. 1 is double-leaf non-clogging impeller axial plane figure among the embodiment.

Fig. 2 removes front shroud blade figure for double-leaf non-clogging impeller among the embodiment.

Among the figure: 1. front shroud of impeller, 2. back shroud of impeller, 3. impeller outlet width, 4. blade, 5. impeller outer diameter, 6. front side of vane, 7. vacuum side of blade, 8. subtended angle of blade, 9. impeller inlet diameter.

Embodiment

Embodiment

Fig. 1 and Fig. 2 have determined this embodiment's impeller shape jointly.It is the same with most of double-leaf non-clogging impellers, has front shroud of impeller (1) and back shroud of impeller (2), the time a kind of double shrouded wheel.If do not have front shroud of impeller and back shroud of impeller very little, promptly make half-opened impeller and unshrouded impeller, do not influence enforcement of the present invention yet.In the drawings, the convex surface of blade (4) is front side of vane (6), and the concave surface of blade (4) is vacuum side of blade (7), the impeller inlet diameter (9) in the present embodiment, and impeller outlet width (3), impeller outer diameter (5) is tried to achieve according to following relation.

Impeller inlet diameter D ₀Formula is: D ₀=K ₀(Q/n) ^1/3K ₀=3.5～4.0

The impeller outer diameter formula is: $D_2=K_{D2}\sqrt{2\mathrm{gH}}/n$ K _D2＝11.064×n _s ^0.1242

Impeller outlet width b ₂Formula is: $b_2=K_{b2}\sqrt{2\mathrm{gH}}/n$ K _b2＝0.03122×n _s ^1.069

In an embodiment, subtended angle of blade

(8) be designed to about 180 °.

Claims (1)

1. design method of double-blade stamped non-clogging impeller, it is characterized in that: the main geometric parameters of impeller has following formula to come calculation Design:

Impeller inlet diameter D ₀Formula is: D ₀=K ₀(Q/n) ^1/3K ₀=3.5～4.0

The impeller outer diameter formula is: $D_2=K_{D2}\sqrt{2\mathrm{gH}}/n$ K _D2＝11.064×n _s ^0.1242

Impeller outlet width b ₂Formula is: $b_2=K_{b2}\sqrt{2\mathrm{gH}}/n$ K _b2＝0.03122×n _s ^1.069

In the formula: the flow of Q-design conditions, rice ³/ second;

The lift of H-design conditions, rice;

The n-wheel speed, rev/min;

n _sThe specific speed of-design pump;

D ₀-impeller inlet diameter, rice;

D ₂-impeller outer diameter, rice;

b ₂-impeller outlet width, rice.

Images