CN102385653B - 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 has different structures 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 adjusting the 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 the maintenance pressure ratio constant substantially when design, according to the methods of 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 determined 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 deficiencies in the 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 determine the ex-meridian of pressure booster blower impeller, determine meridian molded lines and the diffuser leaf height of impeller cover then according to the ex-meridian of the impeller of determining.

Determine parameter Δ Η and the Δ h of the ex-meridian of above-mentioned pressure booster blower impeller by 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 Η represents the high seriation increment of compressor impeller import leaf, is determined by the flow that the coupling diesel engine is required;

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

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

H represents compressor impeller import leaf height;

H represents compressor impeller outlet leaf height;

r ₁Meridian radius in the import of expression compressor impeller;

r ₂The outer meridian radius of expression compressor impeller import;

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

The meridian molded lines of described impeller cover should satisfy formula with the distance of the ex-meridian of the impeller of determining

Wherein D represents 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 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 mates different cylinder numbers keeps the pressure ratio of coupling constant substantially 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 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 determining pressure booster blower impeller 1;

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

By satisfying parameter Δ Η and the Δ h that following formula comes the ex-meridian of pressure booster blower impeller 1 in the determining step one:

|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 Η represents the high seriation increment of compressor impeller 1 import leaf, is determined by the flow that the coupling diesel engine is required;

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

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

H represents compressor impeller import leaf height;

H represents compressor impeller outlet leaf height;

r ₁Meridian radius in the import of expression compressor impeller;

r ₂The outer meridian radius of expression compressor impeller import;

According to Δ Η and Δ h, the method for employing linear bias is determined 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 determined should satisfy formula

Wherein D represents 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 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 mates different cylinder numbers keeps the pressure ratio of coupling constant substantially 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 design and the manufacturing cost of the supercharger of coupling different capacity diesel engine have been reduced.

It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, 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 puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (2)

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

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

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

By satisfying parameter Δ Η and the Δ h:| Δ H that following formula comes the ex-meridian of pressure booster blower impeller in the determining step one (1) _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 Η represents the high seriation increment of compressor impeller (1) import leaf, is determined by the flow that the coupling diesel engine is required;

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

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

H represents compressor impeller import leaf height;

H represents compressor impeller outlet leaf height;

r ₁Meridian radius in the import of expression compressor impeller;

r ₂The outer meridian radius of expression compressor impeller import;

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 determined should satisfy formula

Wherein D represents 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.

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

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