TW200508575A - Non-circular gear and positive displacement flow meter using it - Google Patents
Non-circular gear and positive displacement flow meter using itInfo
- Publication number
- TW200508575A TW200508575A TW093116754A TW93116754A TW200508575A TW 200508575 A TW200508575 A TW 200508575A TW 093116754 A TW093116754 A TW 093116754A TW 93116754 A TW93116754 A TW 93116754A TW 200508575 A TW200508575 A TW 200508575A
- Authority
- TW
- Taiwan
- Prior art keywords
- tooth
- teeth
- mark
- curve
- engagement
- Prior art date
Links
Landscapes
- Measuring Volume Flow (AREA)
- Rotary Pumps (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Gears, Cams (AREA)
- Hydraulic Motors (AREA)
Abstract
The number of teeth is set to 4n + 2 (n is a natural number), both the ends on a long axis are set to be teeth grooves (tooth space, or the like between tooth marks 34, 35), both the ends on a short axis are set to be tips (tips, or the like of a tooth mark 31), a pitch curve is set to be, for example, an ellipse, and tooth marks 31-37, 41-47 are set to be basic tooth mark curves. With the tooth mark curve, the engagement teeth surface (teeth surface 33a, or the like) is set to be an involute curve, a non-engagement tooth surface (tooth surface 33b, or the like) is set to be a cycloid curve, and the tool pressure angle of each tooth mark is set by an undercut limit and a point limit. The non-circular gears 30, 50 bury the recess between two tooth marks (tooth marks 34, 35, and the like), holding the tooth space located at both the ends on the long axis, based on the basic tooth mark curve, and have a shape, where the tooth section including the tip (the tip, or the like of the tooth mark 31) at both the ends on the short axis are scraped off, and the number of teeth completed is finally set to 4n-2. Accordingly, it is able to obtain a non-circular gear that reduces the change in an engagement pressure angle, is advantageous for setting the tool pressure angle of an engagement teeth surface, can reduce the number of teeth without forming an overhang section, and can fully secure the sealing performance with the inner wall of a casing to be installed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003178925A JP3827655B2 (en) | 2003-06-24 | 2003-06-24 | Volumetric flow meter using non-circular gear and non-circular gear |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200508575A true TW200508575A (en) | 2005-03-01 |
TWI257476B TWI257476B (en) | 2006-07-01 |
Family
ID=34180371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW93116754A TWI257476B (en) | 2003-06-24 | 2004-06-10 | Non-circular gear and positive displacement flow meter using it |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP3827655B2 (en) |
KR (1) | KR100556014B1 (en) |
CN (1) | CN1324307C (en) |
TW (1) | TWI257476B (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI119298B (en) * | 2006-05-12 | 2008-09-30 | Osakeyhtioe Skf Aktiebolag | The oval gear meter |
JP4252614B1 (en) * | 2008-03-03 | 2009-04-08 | 株式会社オーバル | Volumetric flow meter and helical gear |
US8312785B2 (en) * | 2008-06-20 | 2012-11-20 | Graco Minnesota Inc. | Involute gear teeth for fluid metering device |
KR101024119B1 (en) * | 2008-10-08 | 2011-03-22 | 주식회사 삼한 | Automatic Plan System for Gerotor Oil Pump |
CN101413818B (en) * | 2008-12-05 | 2010-06-09 | 胡平 | Volume type high order elliptic gear flowmeter |
JP4599454B1 (en) * | 2009-09-07 | 2010-12-15 | 株式会社オーバル | Volumetric gas-liquid two-phase flow meter and multi-phase flow measurement system |
CN101846072B (en) * | 2010-04-23 | 2012-11-14 | 重庆大学 | Egg shape conical gear pump |
CN101975599B (en) * | 2010-05-24 | 2012-05-02 | 上海神舟汽车节能环保有限公司 | Four-steel magnet oval gear flowmeter |
WO2015006539A1 (en) * | 2013-07-10 | 2015-01-15 | Liquid Controls Group, A Unit Of Idex Corporation | Flow meters with improved blocking and displacement rotors |
CN103758754B (en) * | 2014-01-27 | 2015-11-18 | 浙江水利水电学院 | The quaterfoil differential pump that a kind of Bath main officer of Tibet noncircular gear drives |
US9441998B2 (en) * | 2014-07-21 | 2016-09-13 | Ecolab Usa Inc. | Oval gear meter |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57133320A (en) * | 1981-02-12 | 1982-08-18 | Oval Eng Co Ltd | Non-circular gear and flowmeter thereby |
JPS60166775A (en) * | 1984-02-09 | 1985-08-30 | Kinmon Seisakusho:Kk | Noncircular gear |
JPS623885A (en) * | 1985-06-27 | 1987-01-09 | Sumitomo Metal Mining Co Ltd | Electrode material for resistance welding |
JPH0781895B2 (en) * | 1986-11-21 | 1995-09-06 | オ−バル機器工業株式会社 | Volumetric flow meter |
JPS6439052A (en) * | 1987-08-05 | 1989-02-09 | Matsushita Electric Works Ltd | Pin grid array |
JPH0670574B2 (en) * | 1990-03-08 | 1994-09-07 | トキコ株式会社 | Flowmeter |
CN2210386Y (en) * | 1994-08-18 | 1995-10-18 | 王树波 | Flow meter with kidney shaped teeth gear |
ATE217689T1 (en) * | 1995-01-11 | 2002-06-15 | Micropump Inc | SYSTEM WITH BUILT-IN PUMP AND FLUID FLOW METER |
JPH08201135A (en) * | 1995-01-31 | 1996-08-09 | Akitoshi Kitano | Capacity type flowmeter |
CN1132002C (en) * | 1996-01-02 | 2003-12-24 | 株式会社椭圆 | Positive displacement flowmeter |
JPH1089443A (en) * | 1996-09-13 | 1998-04-07 | Akitoshi Kitano | Elliptic gear |
JP3620997B2 (en) * | 1999-06-09 | 2005-02-16 | 株式会社オーバル | Improvement of non-circular gear and non-circular gear type flow meter using the same |
-
2003
- 2003-06-24 JP JP2003178925A patent/JP3827655B2/en not_active Expired - Fee Related
-
2004
- 2004-06-10 TW TW93116754A patent/TWI257476B/en not_active IP Right Cessation
- 2004-06-23 KR KR20040047204A patent/KR100556014B1/en not_active IP Right Cessation
- 2004-06-24 CN CNB2004100694644A patent/CN1324307C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP3827655B2 (en) | 2006-09-27 |
TWI257476B (en) | 2006-07-01 |
KR100556014B1 (en) | 2006-03-03 |
KR20050001379A (en) | 2005-01-06 |
JP2005017001A (en) | 2005-01-20 |
CN1324307C (en) | 2007-07-04 |
CN1573302A (en) | 2005-02-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |