EP1055819A1 - Hydraulische Zahnradpumpe - Google Patents

Hydraulische Zahnradpumpe Download PDF

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Publication number
EP1055819A1
EP1055819A1 EP00401476A EP00401476A EP1055819A1 EP 1055819 A1 EP1055819 A1 EP 1055819A1 EP 00401476 A EP00401476 A EP 00401476A EP 00401476 A EP00401476 A EP 00401476A EP 1055819 A1 EP1055819 A1 EP 1055819A1
Authority
EP
European Patent Office
Prior art keywords
pinion
pump according
pump
polymer
pinions
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.)
Granted
Application number
EP00401476A
Other languages
English (en)
French (fr)
Other versions
EP1055819B1 (de
Inventor
François Fischer
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.)
Hydroperfect International Inc
Original Assignee
Hydroperfect International Inc
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 Hydroperfect International Inc filed Critical Hydroperfect International Inc
Publication of EP1055819A1 publication Critical patent/EP1055819A1/de
Application granted granted Critical
Publication of EP1055819B1 publication Critical patent/EP1055819B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels

Definitions

  • the invention relates to a hydraulic gear pump of the type comprising a driving pinion and a driven pinion meshing with each other, in a casing comprising a suction channel and a discharge channel of a hydraulic fluid.
  • gear pumps of this type which are known, the two pinions are made of steel and have the major drawback of producing significant noise emissions which increase with the speed of rotation of gables. As long as a maximum permissible noise level is fixed by standards, the field of use of hydraulic pumps gear is limited.
  • the object of the present invention is to reduce the noise level of the pumps. gear hydraulics of the type indicated above.
  • the hydraulic gear pump according to the invention is characterized in that at least one of the pinions is made of a material having, in addition to mechanical strength properties, properties vibration damping.
  • the material constituting said pinion has a relatively low coefficient of friction.
  • At least the pinion led is made of low friction material having vibration damping properties.
  • the constituent material said pinion is a polymeric material.
  • the polymer material is a semi-crystalline aromatic linear polymer such as the material marketed under the name of PEEK.
  • Figure 1 is an axial sectional view of a hydraulic pump standard gear.
  • Figure 2 is a sectional view along the line II-II of Figure 1, more large scale.
  • the improved hydraulic gear pump according to the invention has the standard structure known per se as shown in Figures 1 and 2.
  • These pumps essentially comprise a housing or casing 1 formed by a body central 2 and front and rear bodies 3 and 4 respectively which define a substantially cylindrical internal space in which two are mounted pinions meshing with each other, namely a driving pinion 6 driven in rotation by a drive shaft 7 and a driven pinion 8.
  • the pinions are carried by front and rear bearings indicated at 10 and 11 respectively.
  • the drawing further shows at 12 the assembly tie rods of the casing.
  • the latter has a suction path 13 of a hydraulic fluid and a discharge path 14 of pressurized fluid.
  • the particularity of the present invention resides in the fact that at least one of the pinions 6, 8, namely in particular the driven pinion 8, is produced in a material having in addition appropriate mechanical properties, namely a good resistance to wear and friction, damping properties vibrations induced in the pinion.
  • a particularly suitable material is formed from polymers or copolymers advantageously modified by carbon loads. But any other material that has both properties above can be used.
  • the material of the led gear could be semi-crystalline aromatic linear polymer marketed under the name PEEK.
  • a gear in polymer material, in accordance with the present invention can be manufactured by injection into a mold, which makes it possible to manufacture the pinion a low cost price.
  • the use of the polymer material in reducing the noise level extends the possible speed range of the pump.
  • the pump, rotating faster has a smaller displacement and is therefore less bulky, on the one hand, and at a price on the other hand, due to the gain in material. In this advantage adds a lighter weight.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP20000401476 1999-05-28 2000-05-25 Hydraulische Zahnradpumpe Expired - Lifetime EP1055819B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9906801A FR2794188B1 (fr) 1999-05-28 1999-05-28 Pompe hydraulique a engrenage
FR9906801 1999-05-28

Publications (2)

Publication Number Publication Date
EP1055819A1 true EP1055819A1 (de) 2000-11-29
EP1055819B1 EP1055819B1 (de) 2007-10-24

Family

ID=9546148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000401476 Expired - Lifetime EP1055819B1 (de) 1999-05-28 2000-05-25 Hydraulische Zahnradpumpe

Country Status (3)

Country Link
EP (1) EP1055819B1 (de)
DE (1) DE60036833T2 (de)
FR (1) FR2794188B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007028429A1 (de) * 2005-09-02 2007-03-15 Fresenius Medical Care Deutschland Gmbh Zahnradpumpe
WO2019211540A1 (fr) 2018-05-04 2019-11-07 Exoes Pompe a engrenages pour la circulation d'un fluide

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57151087A (en) * 1981-03-12 1982-09-18 Matsushita Electric Ind Co Ltd Gear pump
US4583924A (en) * 1983-11-10 1986-04-22 Fresenius Ag Gear pump, especially for medical purposes
US5163824A (en) * 1990-04-23 1992-11-17 Transcience Associates Inc. Rubber-geared pump with shaftless gear
JPH08247246A (ja) * 1995-01-11 1996-09-24 Mitsubishi Heavy Ind Ltd 搬送用ラックピニオンの潤滑装置
JPH1028930A (ja) * 1996-07-15 1998-02-03 Nkk Corp 樹脂被覆金属体
JPH1077974A (ja) * 1996-09-03 1998-03-24 Heishin Sobi Kk 一軸偏心ねじポンプ
US5865239A (en) * 1997-02-05 1999-02-02 Micropump, Inc. Method for making herringbone gears

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57151087A (en) * 1981-03-12 1982-09-18 Matsushita Electric Ind Co Ltd Gear pump
US4583924A (en) * 1983-11-10 1986-04-22 Fresenius Ag Gear pump, especially for medical purposes
US5163824A (en) * 1990-04-23 1992-11-17 Transcience Associates Inc. Rubber-geared pump with shaftless gear
JPH08247246A (ja) * 1995-01-11 1996-09-24 Mitsubishi Heavy Ind Ltd 搬送用ラックピニオンの潤滑装置
JPH1028930A (ja) * 1996-07-15 1998-02-03 Nkk Corp 樹脂被覆金属体
JPH1077974A (ja) * 1996-09-03 1998-03-24 Heishin Sobi Kk 一軸偏心ねじポンプ
US5865239A (en) * 1997-02-05 1999-02-02 Micropump, Inc. Method for making herringbone gears

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 256 (M - 179) 15 December 1982 (1982-12-15) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 01 31 January 1997 (1997-01-31) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 06 30 April 1998 (1998-04-30) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 08 30 June 1998 (1998-06-30) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007028429A1 (de) * 2005-09-02 2007-03-15 Fresenius Medical Care Deutschland Gmbh Zahnradpumpe
WO2019211540A1 (fr) 2018-05-04 2019-11-07 Exoes Pompe a engrenages pour la circulation d'un fluide
FR3080892A1 (fr) * 2018-05-04 2019-11-08 Exoes Pompe a engrenages pour la circulation d’un fluide

Also Published As

Publication number Publication date
EP1055819B1 (de) 2007-10-24
FR2794188B1 (fr) 2001-08-10
FR2794188A1 (fr) 2000-12-01
DE60036833T2 (de) 2008-07-31
DE60036833D1 (de) 2007-12-06

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