CN102385653A - Supercharger compressor serialization design method - Google Patents

Abstract

The invention discloses a supercharger compressor serialization design method which comprises two steps: determining an external meridian line of an impeller 1 of a supercharger compressor, and determining a meridian molded line of an impeller housing 2 and the height of blades of a diffuser 3 according to the external meridian line of the impeller 1 determined by the step 1. The design method of the invention keeps interfaces and the overall dimensions of a supercharger and a diesel engine constant, the local dimensions of the compressor impeller, the diffuser and the impeller housing are changed only, so that the design and the manufacturing cost of the supercharger matched with the diesel engine with different powers can be lowered.

Description

The supercharger air compressor Design Methods for Series

Technical field:

The present invention relates to a kind of method for designing of pneumatic plant seriation, relate in particular to a kind of method for designing of supercharger air compressor seriation.

Background technology:

At present, diesel engine is widely used in transportation and energy fields such as railway, boats and ships, generating, and along with the development of industry, the kind of diesel engine, series increase fast, and the diesel engine of each model all has various structure and performance parameter.Present stage same model diesel engine (cylinder bore is identical) is mainly constant with the single cylinder structure, and the method for adjustment cylinder number changes the power of diesel engine, thereby carries out the seriation design of diesel engine.The single cylinder structure is constant to make the variation of the required air pressure ratio of diesel engine very little.Therefore, supporting with it supercharger air compressor adopts when design and keeps pressure ratio constant basically, according to the method for the different selected pneumatic plant flows that match of cylinder of diesel engine number.In the design process of supercharger air compressor, constant down in other condition, the pneumatic plant pressure ratio is confirmed by air compressor wheel footpath and vane type line.Therefore, comparatively loaded down with trivial details for the work of the diesel engine of different structure and performance parameter design supercharger air compressor, efficient is lower, its manufacturing cost is also higher.

Summary of the invention:

The objective of the invention is to overcome the deficiency of prior art, the partial structurtes that provide a kind of need to change pneumatic plant just can be to the method for supercharger air compressor seriation design.

Technical scheme of the present invention is: a kind of supercharger air compressor Design Methods for Series,

At first confirm the ex-meridian of pressure booster blower impeller, confirm the meridian molded lines and the diffuser leaf height of impeller cover then according to the ex-meridian of the impeller of confirming.

Through satisfy following formula confirm above-mentioned pressure booster blower impeller ex-meridian parameter Δ H and

Δh：

|ΔH _max|≤30％H

H＝r ₂-r ₁

$\mathrm{\&Delta;h}=(\frac{\mathrm{\&Delta;<figure-callout\; id="2"\; label="H\; r"\; filenames="HDA0000101727910000011.png"\; state="\{\{state\}\}">H</figure-callout>}}{r_{}}+\frac{\mathrm{\&Delta;H}}{r_2-r_1})/2=\mathrm{\&Delta;H}\left(\frac{H+{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000101727910000011.png"\; state="\{\{state\}\}">r</figure-callout>}}_2}{2r_{2}H}\right)h$

Wherein, Δ H representes the high seriation increment of compressor impeller import leaf, is confirmed by the flow that the coupling diesel engine is required;

Δ H _MaxExpression meets the high seriation increment of maximum compressor impeller import leaf of requirement of strength;

Δ h representes the high seriation increment of compressor impeller outlet leaf;

H representes that compressor impeller import leaf is high;

H representes that compressor impeller outlet leaf is high;

R1 representes meridian radius in the compressor impeller import;

R2 representes the outer meridian radius of compressor impeller import;

According to Δ H and Δ h, the method for employing linear bias is confirmed the ex-meridian of pressure booster blower impeller.

The distance of the meridian molded lines of described impeller cover and the ex-meridian of the impeller of confirming should satisfy formula

wherein D represent the gas compressor blade wheel diameter.

The high b of described diffuser leaf should satisfy formula b ≈ 1h～0.9h.

Supercharger air compressor Design Methods for Series provided by the invention; Be exactly not change air compressor wheel footpath and vane type line; Only change the leaf height and the ex-meridian of blade, and diffuser leaf associated therewith is high and the meridian molded lines of impeller cover, to regulate the pneumatic plant flow; The seriation diesel engine that matees different cylinder numbers keeps the pressure ratio of coupling constant basically simultaneously.The interface of supercharger and diesel engine can remain unchanged like this; The physical dimension of supercharger is constant; And only change the local size of these three parts of compressor impeller, diffuser and impeller cover, thereby the design and the manufacturing cost of the supercharger air compressor of coupling different capacity diesel engine have been reduced.

Description of drawings:

Fig. 1 is the air compressor structure synoptic diagram of supercharger air compressor Design Methods for Series of the present invention.

Embodiment:

Below in conjunction with accompanying drawing technical scheme of the present invention is further described.

Be illustrated in figure 1 as the air compressor structure synoptic diagram of supercharger air compressor Design Methods for Series of the present invention.

A kind of supercharger air compressor Design Methods for Series may further comprise the steps:

Step 1: the ex-meridian of confirming pressure booster blower impeller 1;

Step 2: meridian molded lines and the diffuser 3 leaves height of confirming impeller cover 2 according to the ex-meridian of the definite impeller 1 of step 1.

Confirm the parameter Δ H and the Δ h of the ex-meridian of pressure booster blower impeller 1 in the step 1 through satisfying following formula:

|ΔH _max|≤30％H

H＝r ₂-r ₁

$\mathrm{\&Delta;h}=(\frac{\mathrm{\&Delta;<figure-callout\; id="2"\; label="H\; r"\; filenames="HDA0000101727910000011.png"\; state="\{\{state\}\}">H</figure-callout>}}{r_{}}+\frac{\mathrm{\&Delta;H}}{r_2-r_1})/2=\mathrm{\&Delta;H}\left(\frac{H+{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000101727910000011.png"\; state="\{\{state\}\}">r</figure-callout>}}_2}{2r_{2}H}\right)h$

Wherein, Δ H representes the high seriation increment of compressor impeller 1 import leaf, is confirmed by the flow that the coupling diesel engine is required;

Δ H _MaxExpression meets the high seriation increment of maximum compressor impeller import leaf of requirement of strength;

Δ h representes the high seriation increment of compressor impeller 1 outlet leaf;

H representes that compressor impeller import leaf is high;

H representes that compressor impeller outlet leaf is high;

R1 representes meridian radius in the compressor impeller import;

R2 representes the outer meridian radius of compressor impeller import;

According to Δ H and Δ h, the method for employing linear bias is confirmed the ex-meridian of pressure booster blower impeller 1.

The distance of the ex-meridian of the impeller 1 that the meridian molded lines of the impeller cover 2 described in the step 2 and step 1 are confirmed should satisfy formula

wherein D represent the gas compressor blade wheel diameter.

The high b of diffuser described in the step 2 (3) leaf should satisfy formula b ≈ 1h～0.9h.

This programme does not change air compressor wheel footpath and vane type line; Only change the leaf height and the ex-meridian of blade, and diffuser leaf associated therewith is high and the meridian molded lines of impeller cover, to regulate the pneumatic plant flow; The seriation diesel engine that matees different cylinder numbers keeps the pressure ratio of coupling constant basically simultaneously.The interface of supercharger and diesel engine can remain unchanged like this; The physical dimension of supercharger is constant; And only change the local size of these three parts of compressor impeller, diffuser and impeller cover, thereby the design and the manufacturing cost of the supercharger of coupling different capacity diesel engine have been reduced.

What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.

Claims (5)

1. supercharger air compressor Design Methods for Series may further comprise the steps:

Step 1: the ex-meridian of confirming pressure booster blower impeller (1);

Step 2: meridian molded lines and diffuser (3) the leaf height of confirming impeller cover (2) according to the ex-meridian of the definite impeller (1) of step 1.

2. supercharger air compressor Design Methods for Series according to claim 1 is characterized in that: confirm the parameter Δ H and the Δ h of the ex-meridian of pressure booster blower impeller in the step 1 (1) through satisfying following formula:

|ΔH _max|≤30％H

H＝r ₂-r ₁

$\mathrm{\&Delta;h}=(\frac{\mathrm{\&Delta;H}}{r_2}+\frac{\mathrm{\&Delta;H}}{r_2-r_1})/2=\mathrm{\&Delta;H}\left(\frac{H+r_2}{2r_{2}H}\right)h$

Wherein, Δ H representes the high seriation increment of compressor impeller (1) import leaf, is confirmed by the flow that the coupling diesel engine is required;

Δ H _MaxExpression meets the high seriation increment of maximum compressor impeller import leaf of requirement of strength;

Δ h representes the high seriation increment of compressor impeller (1) outlet leaf;

H representes that compressor impeller import leaf is high;

H representes that compressor impeller outlet leaf is high;

R1 representes meridian radius in the compressor impeller import;

R2 representes the outer meridian radius of compressor impeller import;

3. supercharger air compressor Design Methods for Series according to claim 2 is characterized in that: according to Δ H and Δ h, the method for employing linear bias is confirmed the ex-meridian of pressure booster blower impeller (1).

4. supercharger air compressor Design Methods for Series according to claim 1 is characterized in that: the distance of the ex-meridian of the impeller (1) that the meridian molded lines of the impeller cover described in the step 2 (2) and step 1 are confirmed should satisfy formula wherein D represent the gas compressor blade wheel diameter.

5. supercharger air compressor Design Methods for Series according to claim 1 is characterized in that: the high b of the diffuser described in the step 2 (3) leaf should satisfy formula b ≈ 1h～0.9h.

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