CN102808800A - Design method for impeller of stainless steel stamping type non-clogging pump - Google Patents

Abstract

The invention relates to a design method for an impeller of a stainless steel stamping type non-clogging pump. According to the design method, the design formulas for a diameter of an impeller inlet, an outlet width, an outer diameter of the impeller, a placing angle of an outlet angle of a blade and a wrapping angle of the blade are given. The impeller of the stainless steel stamping type non-clogging pump designed according to the design method can be used for improving the flowing of a non-clogging pump and increasing the lift, the efficiency and the running reliability of the stainless steel stamping type non-clogging pump.

Description

A kind of stainless steel punching type Non-blinding pump impeller design method

Technical field

The present invention relates to a kind of design method of major part of Non-blinding pump, particularly a kind of design method of stainless steel punching type Non-blinding pump impeller.

Background technique

When adopting general centrifugal pump design method to design the punching type centrifugal pump; The phenomenon of operating mode is comparatively obvious partially in the process of operation for pump, and this mainly is because the punching press pump blade is a corrosion resistant plate, and thickness is thinner more than 70% than the casting pump blade; The excretion coefficient of blade is very little; Blade surface is very smooth, and the boundary layer of medium is much little, make flow channels relatively characteristics such as increase determine.And impeller is the most crucial parts that influence the Non-blinding pump performance, therefore, in the time of design Non-blinding pump stainless steel punching type impeller, should improve mobilely as far as possible, improves lift, efficient and the operational reliability of stainless steel punching type Non-blinding pump.

Summary of the invention

For addressing the above problem, the invention provides a kind of design method of stainless steel punching type Non-blinding pump impeller.Through changing definite method of the several important design parameter of stainless steel punching type impeller, flow thereby improve Non-blinding pump, improve lift, efficient and the operational reliability of stainless steel punching type Non-blinding pump.

Realize the design method that above-mentioned purpose adopted:

1. impeller inlet diameter

Impeller inlet Diameter Calculation formula

D ₀＝k ₀(Q/n) ^1/3

D in the formula ₀-impeller inlet diameter, rice;

k ₀-inlet diameter coefficient is generally got between 3.8～4.5;

Q-sewage pump flow, cubic meter/hour;

The n-pump rotary speed, rev/min.

2. exit width

The exit width calculating formula

${\mathrm{<figure-callout\; id="2"\; label="b"\; filenames="DEST\_PATH\_HSB00000926382500011.png"\; state="\{\{state\}\}">b</figure-callout>}}_2=0.0312n_s^{1.075}\frac{\sqrt{2\mathrm{gH}}}{n}$

B in the formula ₂-exit width, rice;

G-gravity accleration, rice/quadratic power second;

The n-pump rotary speed, rev/min;

n _s-specific speed;

The H-pump head, rice.

3. impeller outer diameter

The impeller outer diameter calculating formula

${\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="DEST\_PATH\_HSB00000926382500011.png"\; state="\{\{state\}\}">D</figure-callout>}}_2={{\mathrm{kn}}_s}^{0.143}\frac{\sqrt{2\mathrm{gH}}}{n}$

K-external diameter coefficient gets 10.20～11.40 in the formula;

G-gravity accleration, rice/quadratic power second;

D ₂-impeller outer diameter, rice;

n _s-specific speed;

The H-pump head, rice.

4. blade outlet angle laying angle

Generally get β ₂=15 °～25 °, at specific speed hour, the blade exit laying angle is got big value, otherwise when specific speed was big, the blade exit laying angle got the small value.

5. subtended angle of blade

Subtended angle of blade φ=130 °～240 °.

The invention has the beneficial effects as follows: can improve Non-blinding pump according to the stainless steel punching type impeller of the design's method design and flow, improve lift, efficient and the operational reliability of stainless steel punching type Non-blinding pump.

The present invention is on probation through the user, and reaction effect is good, can reduce investment outlay effectively, energy saving.

Description of drawings

Fig. 1 is the impeller axis projection of one embodiment of the invention

Fig. 2 is same embodiment's impeller blade figure

Among the figure: 1. impeller inlet diameter, 2. exit width, 3. impeller outer diameter, 4. blade outlet angle laying angle, 5. subtended angle of blade.

Embodiment

Fig. 1 and Fig. 2 have confirmed the shape of this embodiment's stainless steel punching type Non-blinding pump impeller jointly.It can improve Non-blinding pump and flow lift, efficient and the operational reliability of raising stainless steel punching type Non-blinding pump.The present invention confirms impeller inlet diameter (1), exit width (2), impeller outer diameter (3), blade outlet angle laying angle (4), subtended angle of blade (5) through following relation.

D ₀＝k ₀(Q/n) ^1/3；

${\mathrm{<figure-callout\; id="2"\; label="b"\; filenames="DEST\_PATH\_HSB00000926382500011.png"\; state="\{\{state\}\}">b</figure-callout>}}_2=0.0312n_s^{1.075}\frac{\sqrt{2\mathrm{gH}}}{n};$

${\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="DEST\_PATH\_HSB00000926382500011.png"\; state="\{\{state\}\}">D</figure-callout>}}_2={{\mathrm{kn}}_s}^{0.143}\frac{\sqrt{2\mathrm{gH}}}{n};$

β ₂＝15°～25°；

φ＝130°～240°。

In the formula, at specific speed hour, blade exit laying angle β ₂Get big value, otherwise, when specific speed is big, blade exit laying angle β ₂Get the small value.

Claims (1)

1. stainless steel punching type Non-blinding pump impeller design method, the design formula of impeller main geometric parameters impeller inlet diameter, exit width, impeller outer diameter, blade outlet angle laying angle, subtended angle of blade.It is characterized in that: relation below being fit between Non-blinding pump impeller geometric parameter and the Non-blinding pump design conditions point performance parameter:

D ₀＝k ₀(Q/n) ^1/3；

$b_2=0.0312n_s^{1.075}\frac{\sqrt{2\mathrm{gH}}}{n};$

$D_2={{\mathrm{kn}}_s}^{0.143}\frac{\sqrt{2\mathrm{gH}}}{n};$

β ₂＝15°～25°；

φ＝130°～240°。

In the formula: D ₀-impeller inlet diameter, rice;

k ₀-inlet diameter coefficient is generally got between 3.8～4.5;

Q-sewage pump flow, cubic meter/hour;

b ₂-exit width, rice;

The n-pump rotary speed, rev/min;

n _s-specific speed;

K-external diameter coefficient gets 10.20～11.40;

G-gravity accleration, rice/quadratic power second;

D ₂-impeller outer diameter, rice;

The H-pump head, rice.

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