TW200508575A - Non-circular gear and positive displacement flow meter using it - Google Patents

Non-circular gear and positive displacement flow meter using it

Info

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
Application number
TW093116754A
Other languages
Chinese (zh)
Other versions
TWI257476B (en
Inventor
Seigo Ono
Original Assignee
Oval Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oval Corp filed Critical Oval Corp
Publication of TW200508575A publication Critical patent/TW200508575A/en
Application granted granted Critical
Publication of TWI257476B publication Critical patent/TWI257476B/en

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.
TW93116754A 2003-06-24 2004-06-10 Non-circular gear and positive displacement flow meter using it TWI257476B (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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

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MM4A Annulment or lapse of patent due to non-payment of fees