CN1140712C - a toothed screw - Google Patents
a toothed screw Download PDFInfo
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- CN1140712C CN1140712C CNB011074876A CN01107487A CN1140712C CN 1140712 C CN1140712 C CN 1140712C CN B011074876 A CNB011074876 A CN B011074876A CN 01107487 A CN01107487 A CN 01107487A CN 1140712 C CN1140712 C CN 1140712C
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Abstract
本发明是一种用于双螺杆泵或双螺杆压缩机的齿形螺杆。它通过用渐开线以及以其为基线的摆线包络线替代原有螺杆齿形的渐开线、阿基米德螺旋线或圆弧曲线段。使其用于双螺杆泵或双螺杆压缩机时，能达到严格(完全)的密封，并且不会发生干涉现象，是一种容积效率高，简单、实用、应用效果好，齿形是由摆线(B)、渐开线(J)、以及以其为基线的摆线包络线(B)和螺杆齿顶圆、螺杆齿根圆几组线段组成的齿型螺杆。
The invention is a toothed screw for a twin-screw pump or a twin-screw compressor. It replaces the involute, Archimedes spiral or arc curve segment of the original screw tooth shape with the involute and the cycloid envelope based on it. When it is used in twin-screw pumps or twin-screw compressors, it can achieve strict (complete) sealing without interference. It is a kind of high volume efficiency, simple, practical, and good application effect. A toothed screw consisting of line (B), involute (J), cycloidal envelope (B) based on it, screw addendum circle and screw root circle.
Description
技术领域Technical field
本发明是一种用于双螺杆泵或双螺杆压缩机的齿形螺杆，属于双螺杆泵或双螺杆压缩机所用螺杆的改进技术。The invention relates to a toothed screw used in a twin-screw pump or a twin-screw compressor, which belongs to the improvement technology of the screw used in the twin-screw pump or the twin-screw compressor.
背景技术 Background technique
现有用于双螺杆泵或双螺杆压缩机的螺杆齿形，如渐开线齿形螺杆，其齿形曲线是由摆线、齿根圆圆弧、齿顶圆圆弧、渐开线组合而成，这种螺杆用于双螺杆泵时，其存在的缺点是不能达到严格(完全)密封性，故容积效率不高。Existing screw tooth profiles for twin-screw pumps or twin-screw compressors, such as involute toothed screws, the tooth profile curve is formed by a combination of cycloid, dedendum arc, addendum arc, and involute As a result, when this screw is used in a twin-screw pump, its disadvantage is that it cannot achieve strict (complete) sealing, so the volumetric efficiency is not high.
发明内容Contents of Invention
本发明的目的在于提供一种通过改变其齿形曲线，以使其用于双螺杆泵或双螺杆压缩机时能达到严格(完全)密封，容积效率高，不会发生干涉现象的齿形螺杆。The purpose of the present invention is to provide a toothed screw that can achieve strict (complete) sealing, high volumetric efficiency, and no interference when it is used in a twin-screw pump or a twin-screw compressor by changing its tooth profile curve. .
本发明的齿形曲线如附图所示，曲线abcdefghij为螺杆横截面上的齿形曲线，acg在齿顶圆的一直径上，a在齿顶圆上，c在齿根圆上，g在齿面中径上，d、e在齿根圆上，i、j在齿顶圆上，曲线abc为摆线，cde为齿根圆的圆弧，ija为齿顶圆的圆弧，ghi为渐开线，efg是以ghi线段(渐开线)为基线的摆线包络线。The tooth profile curve of the present invention is as shown in the accompanying drawings, the curve abcdefghij is the tooth profile curve on the cross section of the screw rod, acg is on a diameter of the addendum circle, a is on the addendum circle, c is on the dedendum circle, and g is on the On the pitch diameter of the tooth surface, d and e are on the dedendum circle, i and j are on the dedendum circle, the curve abc is a cycloid, cde is the arc of the dedendum circle, ija is the arc of the dedendum circle, and ghi is The involute, efg is the cycloidal envelope with the ghi line segment (involute) as the baseline.
本发明的积极效果在通过改变其齿形曲线，用渐开线以及以其为基线的摆线包络线替代原有的渐开线或阿基米德螺旋线等曲线段，使该齿形螺杆用于双螺杆泵或双螺杆压缩机时能达到严格(完全)密封，并且不会发生干涉现象。是一种容积效率高，简单、实用，应用效果好的齿形螺杆。The positive effect of the present invention is that by changing its tooth profile curve, the curve sections such as original involute or Archimedes spiral line are replaced with involute line and the cycloid envelope line based on it, so that the tooth profile When the screw is used in a twin-screw pump or a twin-screw compressor, it can achieve strict (complete) sealing without interference. It is a toothed screw with high volumetric efficiency, simplicity, practicality and good application effect.
下面通过附图详细说明本发明的具体结构及其密封机理。The specific structure and sealing mechanism of the present invention will be described in detail below with reference to the accompanying drawings.
附图说明Description of drawings
图1为本发明的齿形曲线，图中abc为直齿面，efghi为斜齿面。Fig. 1 is the profile curve of the present invention, in which abc is a straight tooth surface, and efghi is a helical tooth surface.
图2为图1中螺杆直齿面上的密封线在轴截面上的投影图。Fig. 2 is a projected view of the sealing line on the shaft section of the straight tooth surface of the screw in Fig. 1 .
图3为图1中螺杆斜齿面的密封线在轴截面上的投影图。Fig. 3 is a projection view of the sealing line of the helical tooth surface of the screw in Fig. 1 on the shaft section.
图4为螺杆密封腔的状况图。Figure 4 is a status diagram of the screw sealing cavity.
图5为图4中密封腔的轴截面投影图。Fig. 5 is an axial cross-sectional projection view of the sealing cavity in Fig. 4 .
具体实施方式 Detailed ways
附图1为本发明的齿形曲线，图中abcdefghij为螺杆横截面上的齿形曲线，acg在齿顶圆的一直径上，a在齿顶圆上，c在齿根圆上，g在齿面中径上，d、e在齿根圆上，i、j在齿顶圆上，曲线abc为摆线，cde为齿根圆的园弧，ija为齿顶圆的圆弧，ghi渐开线，efg是以ghi曲线段为基线的摆线包络线。Accompanying
本发明可做成左旋螺杆，也可做成右旋螺杆。The present invention can be made into a left-handed screw or a right-handed screw.
本发明用于双螺杆泵或双螺杆压缩机时，相邻螺杆仅在螺纹方向不同，其齿形结构相同。When the present invention is used in twin-screw pumps or twin-screw compressors, the adjacent screw rods are only different in thread direction and have the same tooth profile.
本发明用于双螺杆泵或双螺杆压缩机时的密封机理如下：The sealing mechanism when the present invention is used for twin-screw pump or twin-screw compressor is as follows:
根据本发明的齿形曲线可得到图2及图3所示的螺杆齿面密封曲线，其中图2为本发明螺杆直齿面的密封线在轴截面上的投影，图中O1螺杆直齿面的密封线是O2螺杆齿顶缘划出的ac弧，而O1螺杆的齿顶缘与O2螺杆齿面同样形成一条密封线a’c’，且螺杆直齿面的密封线ac、a’c’都各自贯穿齿面与壳体和O1、O2线上的螺杆齿底相连。According to the tooth profile curve of the present invention, the screw tooth surface sealing curve shown in Fig. 2 and Fig. 3 can be obtained, wherein Fig. 2 is the projection of the sealing line of the straight tooth surface of the screw of the present invention on the shaft section, in the figure O1 straight tooth of the screw The sealing line of the surface is the ac arc drawn by the tooth top edge of the O 2 screw, and the top edge of the O 1 screw and the tooth surface of the O 2 screw also form a sealing line a'c', and the sealing line ac of the straight tooth surface of the screw , a'c' each pass through the tooth surface and connect with the housing and the bottom of the screw tooth on the O 1 , O 2 line.
图3为图1中螺杆斜齿面的密封线在轴截面上的投影，图中O2螺杆斜齿面的齿面母线与O1螺杆斜齿面的齿根齿形组成的密封曲线就是折线abg；同理，O1螺杆斜齿面齿顶缘与O2螺杆斜齿面根缘在齿面上的密封线是折线a’b’g，它与折线abg相接于g点。由此可见，螺杆斜齿面的密封线是折线abgb’a’，它贯穿于两螺杆的共同齿面，而与O1、O2线上的两螺杆齿底相连。Figure 3 is the projection of the sealing line of the helical tooth surface of the screw in Figure 1 on the shaft section. In the figure, the sealing curve composed of the tooth surface generatrix of the helical tooth surface of the O 2 screw and the root tooth profile of the helical tooth surface of the O 1 screw is the broken line abg; Similarly, the sealing line between the tooth top edge of the O 1 screw helical tooth surface and the O 2 screw helical tooth surface root edge on the tooth surface is the broken line a'b'g, which connects with the broken line abg at point g. It can be seen that the sealing line of the helical tooth surface of the screw is the broken line abgb'a', which runs through the common tooth surface of the two screws and connects with the tooth bottoms of the two screws on the O 1 and O 2 lines.
根据对螺杆齿面密封线的分析，再考虑到O1、O2螺杆齿顶面及齿底面相互相切而形成的密封线，则可得螺杆密封腔状况如图4所示，图4中密封腔的轴截面投影图如图5所示。从图4、图5可见：每级螺杆齿槽中的压液连通路线都形成一个单独的“8”字形封闭环。这个密封环的存在，已从应用本发明的双螺杆泵的实际检测中得到证实，它是完全满足螺杆泵第一、二类密封条件的。According to the analysis of the sealing line of the screw tooth surface, and considering the sealing line formed by the O 1 and O 2 screw tooth top surfaces and tooth bottom surfaces tangent to each other, the condition of the screw sealing chamber can be obtained as shown in Figure 4, and in Figure 4 The axial cross-sectional projection diagram of the sealing cavity is shown in Fig. 5 . It can be seen from Fig. 4 and Fig. 5 that the hydraulic communication route in the tooth groove of each stage forms a separate "8"-shaped closed loop. The existence of this sealing ring has been verified from the actual detection of the twin-screw pump of the present invention, and it fully meets the first and second sealing conditions of the screw pump.
综上所述，可见，本发明用于双螺杆泵或双螺杆压缩机时能达到严格(完全)密封，因此其容积效率高，且不会发生干涉现象。To sum up, it can be seen that when the present invention is used in a twin-screw pump or a twin-screw compressor, it can achieve strict (complete) sealing, so its volumetric efficiency is high and no interference occurs.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011074876A CN1140712C (en) | 2001-01-21 | 2001-01-21 | a toothed screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011074876A CN1140712C (en) | 2001-01-21 | 2001-01-21 | a toothed screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1299930A CN1299930A (en) | 2001-06-20 |
| CN1140712C true CN1140712C (en) | 2004-03-03 |
Family
ID=4656413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011074876A Expired - Fee Related CN1140712C (en) | 2001-01-21 | 2001-01-21 | a toothed screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1140712C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432434C (en) * | 2006-09-29 | 2008-11-12 | 中国船舶重工集团公司第七一一研究所 | Noval tooth-type screw rod |
| CN102465871B (en) * | 2010-11-17 | 2014-11-26 | 上海格什特螺杆科技有限公司 | Screw rotor end face tooth type |
| CN105697363A (en) * | 2016-03-11 | 2016-06-22 | 天津华科螺杆泵技术有限公司 | Asymmetric-tooth-shaped two-end spiral screw with involute force transmission side |
| CN109209864A (en) * | 2017-07-05 | 2019-01-15 | 袁道幸 | A kind of novel tooth form based on mixed transportation of oil and gas Quimby pump |
| CN108050061B (en) * | 2018-01-09 | 2023-08-29 | 中国石油大学(华东) | High-efficiency claw type rotor |
| DE202018000178U1 (en) * | 2018-01-12 | 2019-04-15 | Leybold Gmbh | compressor |
| CN108443145B (en) * | 2018-05-22 | 2020-04-21 | 天津华科螺杆泵技术有限公司 | Double-end spiral screw, double-screw pump adopting same and dry vacuum screw pump |
-
2001
- 2001-01-21 CN CNB011074876A patent/CN1140712C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1299930A (en) | 2001-06-20 |
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According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 1107487.6 of the invention patents in this issue as a notice of authorization, and at the same time corresponding to the 1215031.2 utility model patent to be given up, and in the 20 volume of the 9 issue of the new type of communique on the patent right to abandon the announcement. |
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