CN1584337A - Screw tooth form of double-screw air compressor - Google Patents
Screw tooth form of double-screw air compressor Download PDFInfo
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- CN1584337A CN1584337A CN 200410025282 CN200410025282A CN1584337A CN 1584337 A CN1584337 A CN 1584337A CN 200410025282 CN200410025282 CN 200410025282 CN 200410025282 A CN200410025282 A CN 200410025282A CN 1584337 A CN1584337 A CN 1584337A
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- circular arc
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- 238000007789 sealing Methods 0.000 abstract description 3
- 229910052705 radium Inorganic materials 0.000 abstract 1
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
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Abstract
Profiles of screw rods of a double screw rod air compressor are involved. One of the said screw rods is of single-start thread and another is of three-start one. The top curve in radial section of the said rods is a part of circle with zero as extreme value. The root curve on the opposite of the said rods is a part of circle too. Between one end point of the top curve and one end point of the root curve a general cycloid line is formed symmetrically. The radium of the top curve is three times as one of the root curve. The guiding range of the three-start rod is three times as one of the single-start rod. This design has short sealing line, less leakage, higher pressure, and greater exhaust volume, working efficiently.
Description
Technical field
The present invention relates to a kind of air compressor, especially, the present invention relates to a kind of tooth shape of screw of double-screw air compressor.
Background technique
A number average of existing all double-screw air compressor screw rods is a bull, the profile of tooth complexity.Such as, have plenty of four teeth to six teeth, have plenty of five teeth to six teeth.Each tooth is formed by reaching seven sections curves, and minimum also will be made up of four sections curves, as the GHH molded lines of Germany and the multiple Sheng molded lines in Taiwan.Because its number is many, so the curve complexity is processed complex, amount of finish is big, and length of sealing line is very long, and the leakage triangle area is bigger, and sealing effect is not good enough, and the discharge capacity of all existing double-screw type air compressors is all little, though gas transmission continuously, flow pulsation is little, and pressure is less than low discharge eventually, cost is higher, and overall efficiency is lower.
Summary of the invention
The tooth shape of screw that the purpose of this invention is to provide a kind of double-screw air compressor, the profile of tooth of one root screw rod be single head, and another root is three.
In order to achieve the above object, the technical solution used in the present invention is as follows: a kind of tooth shape of screw of screw-rod air compressor, air compressor comprise two screw rods, it is characterized in that, the profile of tooth of a screw rod is a single head, and the profile of tooth of another root screw rod is three; Being shaped as of single-head screw radial cross section: the top circle curve is that the center of circle is θ
2Circular arc line jk, the root circle curve of the opposite side of top circle is that the center of circle is o
2Circular arc line hi, generalized cycloidal hk forms between top circle camber line jk 1 end k point and root circle camber line hi 1 end h point, be made up of generalized cycloidal ij between root circle camber line hi the other end i point and the top circle camber line jk the other end j point, the radius of top circle camber line jk is three times of radius of root circle camber line hi.
Being shaped as of three screw rod radial cross sections: the profile of tooth of every screw rod of three screw rods is all equal, and is uniformly distributed along the circumference, and the top circle curve is that the center of circle is o
1Circular arc line, wherein the circular arc at two is respectively circular arc ab and circular arc ef, the root circle curve of the opposite side of top circle is that the center of circle is o
1Circular arc line cd, form by generalized cycloidal bc between top circle camber line ab 1 end b point and root circle camber line cd 1 end c point, be made up of generalized cycloidal de between root circle camber line cd the other end d point and the top circle camber line ef the other end e point, the radius of top circle camber line ab is three times of radius of root circle camber line cd; The helical pitch of three tooth shape of screw is three times of single-head screw helical pitch, and the tip diameter of two screw rods equates that root diameter equates.
Advantage of the present invention is: a number is few, and the leakage triangle area is little; Potted line is shorter, good seal performance; Output flow is big, the delivery pressure height, and the efficient height, noise is little; Screw curve is simple, and is easy to process, and processing cost is low.
Description of drawings
Fig. 1 is the longitudinal section view of three screw rods of the present invention;
Fig. 2 is the longitudinal section view of single-head screw of the present invention;
Fig. 3 is two screw rods illustrated in figures 1 and 2 engagement figure when making pure rolling;
Fig. 4 is two screw rods illustrated in figures 1 and 2 pitch curve figure when making pure rolling;
Fig. 5 is the side view of two screw rods illustrated in figures 1 and 2 pitch curve of single-head screw when making pure rolling;
Fig. 6 is the side view of two screw rods illustrated in figures 1 and 2 pitch curve of three screw rods when making pure rolling.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done detailed explanation.
Fig. 1 shows the shape of three screw rod radial cross sections of the present invention, and the profile of tooth of every screw rod of three screw rods all equates, and is uniformly distributed along the circumference.The top circle curve is that the center of circle is o
1Circular arc line, wherein the circular arc at two is respectively circular arc ab and circular arc ef, the root circle curve of the opposite side of top circle is that the center of circle is o
1Circular arc line cd (radian of this circular arc is adjustable, limiting value is zero), form by generalized cycloidal bc between top circle camber line ab 1 end b point and root circle camber line cd 1 end c point, form by generalized cycloidal de between root circle camber line cd the other end d point and the top circle camber line ef 1 end e point.The radius of top circle camber line ab is three times of radius of root circle camber line cd.
Fig. 2 shows the shape of single-head screw radial cross section of the present invention, and the top circle curve is that the center of circle is 0
2Circular arc line jk (radian of this circular arc is adjustable, limiting value be zero), the root circle curve of the opposite side of top circle is that the center of circle is 0
2Circular arc line hi, form by generalized cycloidal hk between top circle camber line jk 1 end k point and root circle camber line hi 1 end h point, form by generalized cycloidal ij between root circle camber line hi the other end i point and the top circle camber line jk the other end j point.The radius of top circle camber line jk is three times of radius of root circle camber line hi.
Generalized cycloidal bc and de be respectively when the single-head screw root circle when three screw rod top circles are made pure rolling, k point on the single-head screw and the conjugate curve that on three screw rods, formed in j o'clock; Generalized cycloidal hk and ji be respectively when the single-head screw root circle when three screw rod top circles are made pure rolling, the conjugate curve that b point on three screw rods and e point form on single-head screw.
The helical pitch of three tooth shape of screw is three times of single-head screw, the radian of circular arc jk is three times of radian of circular arc cd, and the radian of circular arc hi is three times of circular arc ab radian, and the length of screw rod is slightly larger than the helical pitch of single-head screw, the tip diameter of two screw rods equates that root diameter equates.
Fig. 3 shows the meshing relation of two screw rods correspondence of the present invention, the pitch curve of three screw rod top circle ab correspondences is root circle ih of single-head screw, the pitch curve of three screw rod root circle cd correspondences is top circle ik of single-head screw, point b is corresponding to generalized cycloidal hk, point e is corresponding to generalized cycloidal ij, generalized cycloidal bc is corresponding to a k, and some j is corresponding to generalized cycloidal de.
As Fig. 4, shown in Figure 5, when two screw rods rolled relatively, three head rods will form space pitch curve 1-2-3-4-5-6-7 on the single head bar.
Equally, as Fig. 4, shown in Figure 6, single-head screw also can form corresponding pitch curve on three screw rods.Because it is continuous rotating, two pitch curves have been blocked the input cavity and the output cavity of pump, and constantly push ahead, thereby produce pressurized gas.
The foregoing description is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (3)
1. the tooth shape of screw of a double-screw air compressor, air compressor comprises two screw rods, it is characterized in that,
The profile of tooth of a screw rod is single head, and the profile of tooth of another root screw rod is three.
Being shaped as of single-head screw radial cross section: the top circle curve is that the center of circle is θ
2Circular arc line jk, the root circle curve of the opposite side of top circle is that the center of circle is o
2Circular arc line hi, generalized cycloidal hk forms between top circle camber line jk 1 end k point and root circle camber line hi 1 end h point, be made up of generalized cycloidal ij between root circle camber line hi the other end i point and the top circle camber line jk the other end j point, the radius of top circle camber line jk is three times of radius of root circle camber line hi.
Being shaped as of three screw rod radial cross sections: the profile of tooth of every screw rod of three screw rods is all equal, and is uniformly distributed along the circumference, and the top circle curve is that the center of circle is o
1Circular arc line, wherein the circular arc at two is respectively circular arc ab and circular arc ef, the root circle curve of the opposite side of top circle is that the center of circle is o
1Circular arc line cd, form by generalized cycloidal bc between top circle camber line ab 1 end b point and root circle camber line cd 1 end c point, be made up of generalized cycloidal de between root circle camber line cd the other end d point and the top circle camber line ef the other end e point, the radius of top circle camber line ab is three times of radius of root circle camber line cd.
The helical pitch of three tooth shape of screw is three times of single-head screw helical pitch, and the tip diameter of two screw rods equates that root diameter equates.
2. the tooth shape of screw of double-screw air compressor according to claim 1 is characterized in that, the length of described screw rod is slightly larger than the helical pitch of single-head screw.
3. according to the tooth shape of screw of claim 1 and 2 described double-screw air compressors, it is characterized in that the radian of described circular arc jk and circular arc cd is adjustable, its limiting value is zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100252827A CN100406739C (en) | 2004-06-14 | 2004-06-14 | Screw tooth form of double-screw air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100252827A CN100406739C (en) | 2004-06-14 | 2004-06-14 | Screw tooth form of double-screw air compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1584337A true CN1584337A (en) | 2005-02-23 |
| CN100406739C CN100406739C (en) | 2008-07-30 |
Family
ID=34601199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100252827A Expired - Fee Related CN100406739C (en) | 2004-06-14 | 2004-06-14 | Screw tooth form of double-screw air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100406739C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100360809C (en) * | 2005-09-30 | 2008-01-09 | 陈光亮 | Unequal-tooth-number screw profile for high-flow high-pressure dual-screen pump |
| CN100360810C (en) * | 2005-09-30 | 2008-01-09 | 浙江大学 | Screw profile for high flow high-pressure dual-screw pump |
| CN100360808C (en) * | 2005-09-30 | 2008-01-09 | 陈行 | Unequal-tooth-number screw profile for high-flow high-pressure three-screw pump |
| CN100417816C (en) * | 2005-09-30 | 2008-09-10 | 浙江大学 | Screw profile for high-flow high-pressure three-screw pump |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2739873B2 (en) * | 1995-10-04 | 1998-04-15 | クムウオン カンパニー リミテッド | Tooth profile of screw rotor for compressor |
| JPH09264277A (en) * | 1996-03-27 | 1997-10-07 | Tochigi Fuji Ind Co Ltd | Roots type fluid machine |
| CN1337528A (en) * | 2001-09-12 | 2002-02-27 | 浙江大学 | New profile bolt |
| CN1363771A (en) * | 2002-02-08 | 2002-08-14 | 冯嫩妙 | Tooth-shaped screw bolt |
-
2004
- 2004-06-14 CN CNB2004100252827A patent/CN100406739C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100360809C (en) * | 2005-09-30 | 2008-01-09 | 陈光亮 | Unequal-tooth-number screw profile for high-flow high-pressure dual-screen pump |
| CN100360810C (en) * | 2005-09-30 | 2008-01-09 | 浙江大学 | Screw profile for high flow high-pressure dual-screw pump |
| CN100360808C (en) * | 2005-09-30 | 2008-01-09 | 陈行 | Unequal-tooth-number screw profile for high-flow high-pressure three-screw pump |
| CN100417816C (en) * | 2005-09-30 | 2008-09-10 | 浙江大学 | Screw profile for high-flow high-pressure three-screw pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100406739C (en) | 2008-07-30 |
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Granted publication date: 20080730 |