CN206681977U - A kind of tooth shape of screw molded line structure - Google Patents
A kind of tooth shape of screw molded line structure Download PDFInfo
- Publication number
- CN206681977U CN206681977U CN201720383512.XU CN201720383512U CN206681977U CN 206681977 U CN206681977 U CN 206681977U CN 201720383512 U CN201720383512 U CN 201720383512U CN 206681977 U CN206681977 U CN 206681977U
- Authority
- CN
- China
- Prior art keywords
- curvature
- easement curve
- tooth
- camber line
- oval
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Rotary Pumps (AREA)
Abstract
A kind of tooth shape of screw molded line structure, tooth-shaped molded line is continuously made up of addendum circle arc, oval camber line, easement curve, tooth root circular arc, wherein, connected between addendum circle arc and easement curve using oval camber line, oval major radius and short radius determine according to the curvature of addendum circle arc and the curvature of easement curve.The utility model is because easement curve is using the original cycloid of the envelope substitution of oval camber line, engagement so between screw rod is by the contact between being cambered surface, fundamentally solve the problems, such as that a contact is easy to wear, elliptic arc curvature of a curve in consecutive variations on whole camber line simultaneously, the easement curve at two contact points, circular arc, the curvature of the cylindrical three of tooth top can realize consecutive variations, therefore when screw rod contact engages, will smooth transition, without vibrations and noise, significantly reduce abrasion during screw rod operation, so as to improve the service life of screw pump.
Description
Technical field
The present invention relates to a kind of screw pump molded line to optimize structure, including the optimization of various multiscrew type screw rod of screw pump molded line,
Especially to the improvement of dual-screw pump screw molded line structure.
Background technology
The most important parts of screw pump are exactly screw rod, and its tooth shape of screw molded line plays conclusive to the overall performance of pump
Effect.Tooth shape of screw molded line is usually to be made up of addendum circle arc, easement curve, tooth root circular arc, and wherein easement curve is typically by putting
Based on line.As shown in figure 1, easement curve can typically use with outside circle junction into certain sharp degree, wedge angle screw pump
Abrasion is easy in journey, screw pump leakage increase is caused after abrasion, the efficiency of screw pump is influenceed, even with the life-span.Therefore
Just there is the optimization to tooth shape of screw wedge angle, as shown in Fig. 2 a kind of optimization method is to use straight line modified tooth profile wedge angle, but
It is that this kind of method is that wedge angle is relatively blunt, revised tooth form still has wedge angle, simply relatively original more more resistant,
But still fundamentally do not solve the problems, such as that wedge angle is easy to wear.As shown in figure 3, another optimization method is to use circular arc amendment
Tooth form wedge angle, although this method solves the problems, such as wedge angle, but easement curve is also required to larger amendment after circular arc amendment, have impact on
The engagement of whole tooth form, and the cylindrical three's curvature jerk value of easement curve, circular arc, tooth top is very big at two contact points,
When screw rod contact engages, it may appear that larger vibrations and noise, or even the performance and service life of screw rod can be influenceed.
The content of the invention
The purpose of this invention is, a kind of optimal tooth shape of screw molded line structure is provided for screw pump.
What the technology of this invention was realized in.A kind of tooth shape of screw molded line structure, it is characterised in that tooth-shaped molded line by
Addendum circle arc, oval camber line, easement curve, tooth root circular arc continuously form, wherein, using ellipse between addendum circle arc and easement curve
Circular arc line connects, and oval major radius and short radius determine according to the curvature of addendum circle arc and the curvature of easement curve.
The present invention is because easement curve using the envelope of oval camber line substitutes original cycloid, nibbling between such screw rod
It will be contact between cambered surface to close, and fundamentally solves the problems, such as that a contact is easy to wear, while elliptic arc curvature of a curve is whole
All be in consecutive variations on individual camber line, at two contact points easement curve, circular arc, the cylindrical three of tooth top curvature can be real
Existing consecutive variations, therefore when screw rod contact engages, it will smooth transition, without vibrations and noise, greatly drop
Abrasion during low screw rod operation, so as to improve the service life of screw pump.
Brief description of the drawings
Accompanying drawing 1 is prior art easement curve and addendum circle arc is in wedge angle；
Accompanying drawing 2 is prior art straight line modified tooth profile wedge angle；
Accompanying drawing 3 is prior art circular arc modified tooth profile wedge angle；
Accompanying drawing 4 is the oval camber line modified tooth profile wedge angle of the present invention；
Accompanying drawing 5 is three kinds of optimization method comparison diagrams；
Accompanying drawing 6 is three kinds of optimization method contrast partial enlarged drawings.
1 addendum circle arc, 2 oval camber lines, 3 easement curves, 4 tooth root circular arcs.
Embodiment
The implementation of the present invention is further elaborated below in conjunction with brief description of the drawings.
Referring to accompanying drawing 4, a kind of tooth shape of screw molded line structure, tooth-shaped molded line is by addendum circle arc 1, oval camber line 2, easement curve
3rd, tooth root circular arc 4 continuously forms, wherein, connected between addendum circle arc and easement curve using oval camber line, oval major radius
Determined with short radius according to the curvature of addendum circle arc and the curvature of easement curve.Easement curve of the present invention is using oval camber line
Envelope substitutes original cycloid.Oval curvature is continuously changing on whole oval camber line, oval major radius and short by half
Footpath determines the curvature according to addendum circle arc and the curvature of easement curve, to realize addendum circle arc, oval camber line, easement curve
The consecutive variations of curvature between three.Engagement so between screw rod fundamentally solves the contact between being cambered surface a little
The problem of easy to wear is contacted, while elliptic arc curvature of a curve in consecutive variations on whole camber line, in two contacts
Easement curve, oval camber line, the curvature of addendum circle arc three realize consecutive variations at point, therefore when screw rod contact engages,
Will smooth transition, without shake and noise, significantly reduce screw rod operation when abrasion, so as to improve screw rod
The service life of pump.
Referring to Fig. 5, Fig. 6, the comparing result of three kinds of modification methods is listed, it can be seen that：Straight line modified tooth profile wedge angle, no
The defects of tooth form wedge angle is easy to wear is not only inherently eliminated, at the same it is big to easement curve correction, cause larger leakage
Triangle；Circular arc modified tooth profile wedge angle, the defects of tooth form wedge angle is easy to wear can be eliminated, but easement curve correction is also compared
Greatly, larger leakage triangle, while easement curve, circular arc, the cylindrical three's curvature of tooth top at two contact points of tooth shape of screw are caused
Jerk value is very big, when screw rod contact engages, it may appear that larger vibrations and noise, or even the usability of screw rod can be influenceed
Energy and service life；From the point of view of being analyzed more than, oval camber line amendment tooth shape of screw wedge angle is optimum structure.
Claims (1)
1. a kind of tooth shape of screw molded line structure, it is characterised in that tooth-shaped molded line is by addendum circle arc, oval camber line, easement curve, tooth
Root circular arc continuously forms, wherein, connected between addendum circle arc and easement curve using oval camber line, oval major radius and short by half
Footpath determines according to the curvature of addendum circle arc and the curvature of easement curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720383512.XU CN206681977U (en) | 2017-04-13 | 2017-04-13 | A kind of tooth shape of screw molded line structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720383512.XU CN206681977U (en) | 2017-04-13 | 2017-04-13 | A kind of tooth shape of screw molded line structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206681977U true CN206681977U (en) | 2017-11-28 |
Family
ID=60400118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720383512.XU Active CN206681977U (en) | 2017-04-13 | 2017-04-13 | A kind of tooth shape of screw molded line structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206681977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019348A (en) * | 2018-01-22 | 2018-05-11 | 中国石油大学(华东) | A kind of screw rotor for including elliptic arc |
-
2017
- 2017-04-13 CN CN201720383512.XU patent/CN206681977U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019348A (en) * | 2018-01-22 | 2018-05-11 | 中国石油大学(华东) | A kind of screw rotor for including elliptic arc |
| CN108019348B (en) * | 2018-01-22 | 2023-11-24 | 中国石油大学(华东) | Screw rotor comprising elliptical arcs |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100404791C (en) | Compressor rotor blade | |
| CN206681977U (en) | A kind of tooth shape of screw molded line structure | |
| CN106122092B (en) | A kind of novel blade and the impeller using the fan blade | |
| CN108730178A (en) | Tooth shape of screw molded line structure | |
| CN203641003U (en) | 45-degree pitch pressure angle involute type rotor of roots pump | |
| CN110374706A (en) | Engine symmetrical expression Valve-train Cam | |
| CN207178203U (en) | Deform scraping blade displacement pump | |
| CN206092674U (en) | Shaft | |
| CN201771859U (en) | Electric fan blade | |
| CN209324734U (en) | A kind of air vane | |
| CN205324161U (en) | Sieve separator is transfer line for drive mechanism | |
| CN205503915U (en) | Machine horn gear | |
| CN2771521Y (en) | Optimized model line of dual-screw pump screw | |
| CN208546427U (en) | A kind of high intensity curved surface transmission shaft | |
| CN208816576U (en) | A kind of starting whirling spring for chain saw | |
| CN206878207U (en) | Connection terminal for medical treatment | |
| CN203765366U (en) | Rotating disc type air valve machining conveyor | |
| CN208058188U (en) | A kind of alloy aluminum flange | |
| CN204082480U (en) | Bar linkage structure and comprise the reciprocating type refrigeration compressor of this bar linkage structure | |
| CN202883384U (en) | Stator of electric vacuum pump | |
| CN203374319U (en) | Twin-screw expander | |
| CN206360886U (en) | A kind of impeller pump abrasion-proof structure | |
| CN203297381U (en) | Mechanical connection block | |
| CN108035819A (en) | The wide arc gap side through hole of cylinder cover of automobile engine tappet bore | |
| CN104088812B (en) | Axial-flow fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |