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WO2018198801A1 - Rotor pour pompe à engrenages, et pompe à engrenages - Google Patents

Rotor pour pompe à engrenages, et pompe à engrenages Download PDF

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Publication number
WO2018198801A1
WO2018198801A1 PCT/JP2018/015406 JP2018015406W WO2018198801A1 WO 2018198801 A1 WO2018198801 A1 WO 2018198801A1 JP 2018015406 W JP2018015406 W JP 2018015406W WO 2018198801 A1 WO2018198801 A1 WO 2018198801A1
Authority
WO
WIPO (PCT)
Prior art keywords
edge
curve
rotor
tooth
gear pump
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.)
Ceased
Application number
PCT/JP2018/015406
Other languages
English (en)
Japanese (ja)
Inventor
小林　喜幸
孔二 樋口
裕 橋本
智一 池田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Powertrain Systems Corp
Original Assignee
Nidec Tosok 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
Priority claimed from JP2017154252A external-priority patent/JP6982780B2/ja
Application filed by Nidec Tosok Corp filed Critical Nidec Tosok Corp
Priority to CN201890000781.6U priority Critical patent/CN211370712U/zh
Publication of WO2018198801A1 publication Critical patent/WO2018198801A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member

Definitions

  • the pump unit 3 is provided below the motor unit 2.
  • the pump unit 3 includes a pump housing 31 and a gear pump rotor 4.
  • the pump housing 31 includes a pump body 32 and a pump cover 33.
  • the pump body 32 is attached to the lower part of the motor housing 21.
  • a recess 322 is provided on the lower surface of the pump body 32.
  • the recess 322 has a cylindrical shape and is recessed toward the motor unit 2.
  • the pump body 32 is provided with a through hole 321 centered on the rotation axis R1.
  • the through hole 321 opens on the bottom surface of the recess 322, that is, the upper surface in the recess 322.
  • the shaft 25 is inserted into the through hole 321.
  • the pump cover 33 is attached to the lower surface of the pump body 32.
  • the outer rotor 46 has an annular shape centering on the axis R2 parallel to the axial direction, and surrounds the inner rotor 41.
  • the outer rotor 46 is a gear having (n + 1) teeth 47 facing inward.
  • the teeth 47 of the outer rotor 46 are referred to as “inner teeth 47”.
  • the (n + 1) internal teeth 47 are provided on the inner circumference of the outer rotor 46 and are arranged at equal intervals in the circumferential direction around the axis R2.
  • the inner teeth 47 mesh with the outer teeth 42 of the inner rotor 41.
  • the number of inner teeth 47 in the outer rotor 46 is eight.
  • a line C1 connecting the tooth tip P1 and the rotation axis R1 is indicated by a one-dot chain line.
  • the line C ⁇ b> 1 is a center line of the outer teeth 42 of the inner rotor 41.
  • one tooth bottom portion 491 is disposed between the two tooth tip portions 481 adjacent to each other.
  • the tooth tip group 48 is arranged closer to the rotation axis R ⁇ b> 2 than the tooth bottom group 49.
  • the setting curve L4 of the tooth bottom portion 441 is located on the radially inner side of the inner rotor 41 with respect to the setting curve L3 of the tooth tip portion 431, and a portion including the position where the distance from the rotation axis R1 is minimum in the setting curve L4. It becomes the edge of the tooth bottom part 441.
  • the edge of the tooth bottom portion 441 is located between the rotation axis R1 and the setting curve L3 of the tooth tip portion 431. For example, by making the radius of the base circle for the setting curve L3 larger than the radius of the base circle for the setting curve L4, or by making the radius of the forming circle for the setting curve L3 smaller than the radius of the forming circle for the setting curve L4, etc.
  • the setting curves L3 and L4 as described above can be easily obtained.
  • the first clothoid curve portion 403 includes a portion indicating the inflection point M2 of the first clothoid curve V21. At the inflection point M2, the curvature of the first clothoid curve V21 is zero. In addition, the slope of the first clothoid curve V21 coincides with the slope of the boundary line C2 at the inflection point M2.
  • the other member has another tooth bottom group having an edge along the third setting curve and a fourth setting curve different from the third setting curve.
  • Another tooth tip group having an edge, and the edge of the other tooth tip group is located between the one member and the third setting curve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

Rotor pour une pompe à engrenages comprenant : un rotor intérieur qui comporte n dents (n étant un nombre entier supérieur ou égal à 2) tournées vers l'extérieur ; et un rotor extérieur qui est une forme annulaire entourant la périphérie du rotor intérieur, est positionné de manière excentrique par rapport au rotor intérieur, et comporte (n+1) dents tournées vers l'intérieur. Un premier élément du rotor intérieur et du rotor extérieur comprend un groupe de sections de fond de dents ayant chacune un bord le long d'une première courbe de réglage, et un groupe de sections de pointe de dents ayant chacune un bord le long d'une seconde courbe de réglage qui est différente de la première courbe de réglage, lesdites courbes de réglage étant des enveloppes qui sont obtenues par le déplacement d'un cercle de formage le long d'une courbe trochoïde sur la base d'un cercle de base, ledit cercle de formage étant plus petit que le cercle de base. Les bords du groupe de sections de pointe de dents sont positionnés entre la première courbe de réglage et l'autre élément du rotor intérieur et du rotor extérieur.
PCT/JP2018/015406 2017-04-28 2018-04-12 Rotor pour pompe à engrenages, et pompe à engrenages Ceased WO2018198801A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201890000781.6U CN211370712U (zh) 2017-04-28 2018-04-12 齿轮泵用转子和齿轮泵

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201762491405P 2017-04-28 2017-04-28
US62/491,405 2017-04-28
JP2017154252A JP6982780B2 (ja) 2017-04-28 2017-08-09 歯車ポンプ用ロータおよび歯車ポンプ
JP2017-154252 2017-08-09

Publications (1)

Publication Number Publication Date
WO2018198801A1 true WO2018198801A1 (fr) 2018-11-01

Family

ID=63919585

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/015406 Ceased WO2018198801A1 (fr) 2017-04-28 2018-04-12 Rotor pour pompe à engrenages, et pompe à engrenages

Country Status (1)

Country Link
WO (1) WO2018198801A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111425391A (zh) * 2020-05-08 2020-07-17 潍柴动力股份有限公司 转子泵

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007034888A1 (fr) * 2005-09-22 2007-03-29 Aisin Seiki Kabushiki Kaisha Rotor de pompe à huile
US20070220749A1 (en) * 2006-03-24 2007-09-27 Korea Sintered Metal Co., Ltd. Method of designing tooth profile for internal gear type pump
JP2010151068A (ja) * 2008-12-26 2010-07-08 Sumitomo Electric Sintered Alloy Ltd ポンプ用ロータとそれを用いた内接歯車式ポンプ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007034888A1 (fr) * 2005-09-22 2007-03-29 Aisin Seiki Kabushiki Kaisha Rotor de pompe à huile
US20070220749A1 (en) * 2006-03-24 2007-09-27 Korea Sintered Metal Co., Ltd. Method of designing tooth profile for internal gear type pump
JP2010151068A (ja) * 2008-12-26 2010-07-08 Sumitomo Electric Sintered Alloy Ltd ポンプ用ロータとそれを用いた内接歯車式ポンプ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111425391A (zh) * 2020-05-08 2020-07-17 潍柴动力股份有限公司 转子泵

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