US3859014A - Gear pump - Google Patents

Gear pump Download PDF

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Publication number
US3859014A
US3859014A US267710A US26771072A US3859014A US 3859014 A US3859014 A US 3859014A US 267710 A US267710 A US 267710A US 26771072 A US26771072 A US 26771072A US 3859014 A US3859014 A US 3859014A
Authority
US
United States
Prior art keywords
housing
journalling
chamber
gears
end faces
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.)
Expired - Lifetime
Application number
US267710A
Other languages
English (en)
Inventor
Wilhelm Dworak
Wolfgang Talmon
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3859014A publication Critical patent/US3859014A/en
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
    • F04C2/086—Carter

Definitions

  • a gear pump or a gear motor has a housing of syn- July 20, 1971 Germany 2136214 thetic plastic material, an interior chamber of which there is mounted a pair of meshing gears.
  • the gears [52] U.S. Cl 418/135, 418/152, 418/178, are each mounted on a rotating shaft having journal- 418/179, 418/206 ling pins at opposite ends and these pins are journalled [51] Int.
  • a gear pump or gear motor which, briefly stated, comprises a housing of synthetic plastic material having an internal chamber.
  • a pair of meshing gears are provided in this chamber and they each include a mounting shaft having journalling pins at its opposite ends.
  • a plurality of cupped metallic journalling sleeves journal the respective journalling pins for rotation.
  • Each of these sleeves has an open side facing into the chamber and a closed side provided with a transverse wall which is exposed at least in part exteriorly of the housing to the ambient atmosphere.
  • the apparatus according to the present invention assures, due to the provision of the above-mentioned journalling sleeves and their at least partly exposed transverse end walls, that any frictional heat resulting during operation is conducted directly to the exterior of the housing by the metallic journalling sleeves which are good thermal conductors. This means that any build up of heat to levels which could cause damage to the apparatus such as uncontrolled deformations of the components of the apparatus is reliably avoided, and avoided in a simple manner.
  • the invention also proposes to mount on that journalling sleeve through which an end portion of the shaft for the driven or driving gear is journalled, a cupshaped of pot-shaped mount for a shaft seal with such mount having a transverse wall through which the shaft extends to the exterior of the housing, and with the circumferential wall of the mount being at least in part exposed (i.e. being uncovered by the plastic material of the housing) to the ambient atmosphere.
  • journalling sleeves are advantageously provided with radial-flanges surrounding the region of their open ends and clamp-shaped springs engage the exterior of the sleeves and maintain the flanges in sealing contact with the axial end faces of the gears.
  • FIG. 1 is an axial section through an apparatus according to the present invention.
  • FIG. 2 is an end view of the apparatus in FIG. 1.
  • reference numeral 1 identifies the housing of the novel hydrostatic apparatus that is the gear pump or gear motor, which housing is of synthetic plastic material and is of one-piece being produced in a single operation.
  • the housing 1 has an internal chamber composed of two overlapping portions 2, 3 in which there are mounted two gears 4, 5 which mesh with one another.
  • the gears are mounted on shafts l0 and 11, respectively, and the latter in turn are journalled in metallic journalling sleeves 6, 7, 8 and 9.
  • journalling sleeves 6, 7 and 8 are cupped, and have outer closed ends provided with transverse end walls 12, 13 and 14.
  • These end walls l2-l4 are so located that in the illustrated embodiment they form a part of the outer surface of the housing I; in other words, the end walls 1244 are exposed to the ambient atmosphere exteriorly of the housing and are not covered by the plastic material of the latter. in accordance with the invention it is essential that if not completely uncovered, the ends walls 12-14 are at least in part uncovered by the plastic material and exposed to the ambient atmosphere.
  • the additional journalling sleeve 9 is provided with a journalling bore and through the sleeve 9 the shaft 10 extends out of the housing 1, the shaft 10 serving either for input or output purposes, that is its associated gear being either driven by the shaft 10 or driven via the other gear.
  • a cup-shaped mount for a shaft seal 16 which seals the shaft 10 with respect to the chamber of the housing to prevent the escape of fluid from the latter.
  • the cylindrical portion of the mount 15 extends out of the housing 1.
  • Flanges l7, 18, 19 and 20 are provided on the sleeves 6 9, respectively at the inner ends thereof which face the interior of the chamber. These flanges 17-20 engage the respectively adjacent axial end faces of the gears 4 and 5 and define the interior space of the chamber, together with a cylindrical insert 21 of metallic sheet material strip which is formed to correspond to the contour of the inner cylindrical surface of the chamber. The width of the strip of which the insert 21 is composed corresponds to the width of the gears 4 and 5 except for a small amount of play.
  • Springs 22 of clamp-shaped configuration are embedded in the plastic material of the housing 1 and contact the outer sides of the flanges 17-20 urging them in at least substantially sealing contact with the respective axial end faces of the gears 4 and 5.
  • Two tubular sections are embedded in the material of the housing 1, constituting an inlet 23 and an outlet 24 for the fluid which is to pass through the apparatus.
  • the tubular portions extend outwardly beyond the housing 1 by the extent necessary to permit connection to them of the fluid conduits supplying and removing the fluid.
  • Two mounting lugs 25 and 26 are formed at the outside of the housing so that the latter can be mounted wherever necessary.
  • the housing by injection molding rather than by casting. If the mold is appropriately produced, with a view towards holding the various components in place, then the springs 22 can be omitted.
  • the sleeves 6 9 are advantageously, but not necessarily made of aluminum. This has the advantage that they can be produced in a simple and inexpensive deformation operation, for instance by flow-pressing. Moreover, aluminum has a high coefficient of thermal conductivity and has been found to be excellently suited as the material for the journal sleeves 6 9.
  • Plastic material suitable for making the housing 1 could be e. g. polyester resin, epoxy resin or silicon resin.
  • a gear pump or gear motor comprising a housing of synthetic plastic material having an internal chamber and an inlet and an outlet communicating with said chamber, a pair of meshing gears having opposite end faces provided in said chamber and each including a mounting shaft having journalling pins at its opposite ends; a plurality of cupped metallic journalling sleeves journalling the respective journalling pins for rotation, each of said sleeves having an open side facing into said chamber, a closed side providedwith a transverse wall extending at least in part exteriorly of said housing and exposed to the ambient atmosphere, and a transverse flange in engagement with said respective end faces of said gears so as to conduct heat from said gears via said transverse wall to the exterior of said housing; spring clamps having intermediate and transversely extending end portions embedded in the material of said housing, and said transversely extending end portions engaging said flanges at the sides thereof facing away from the respective end faces of said gears for pressing said flanges against said end faces.
  • a gear pump or gear motor as defined in claim 1 said chamber being in part bounded by a substantially cylindrical surface; and wherein said sleeves have respective flanges each encircling one of said open sides and bounding said chamber together with said substantially cylindrical surface.
  • a gear pump or gear motor as defined in claim 2 said gears having respective axial end faces; and wherein said flanges are in engagement with respective ones of said end faces.
  • a gear pump or gear motor as defined in claim 2 further comprising a substantially cylindrical metalstrip insert accommodated in said chamber and overlying said cylindrical surface; said insert having a length corresponding substantially to that of the respective gears.
  • a gear pump or gear motor as defined in claim 1 one of said shafts having a shaft portion extending to the exterior of said housing; and further comprising a cupped metallic retainer accommodating a shaft seal, said retainer having a transverse wall through which said shaft portion extends, and a circumferential wall which is at least in part exposed to the ambient atmosphere.
  • a gear pump or gear motor comprising an integral housing of plastic material having an internal chamber and an inlet and an outlet communicating with said chamber; a pair of meshing gears in said chamber and having opposite end faces and each including a mount ing shaft having journalling pins projecting outwardly from the respective end faces, one of said journalling pins projecting beyond the outer surface of said housing and the other of said journalling pins ending short of said outer surface; a plurality of metallic journalling sleeves journalling the respective journalling pins and each having an open side at the respective end face, and each of said sleeves for said other of said journalling pins having a side formed by a transverse wall at the outer surface of said housing and exposed to the ambient atmosphere to thereby dissipate heat, each of said sleeves having a transverse flange in engagement with the respective end face of said gears; substantially U-shaped spring clamps embedded in the material of said housing and engaging said flanges at the sides thereof facing away from the respective end faces of said gears for pressing said flanges against said end faces; and

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Hydraulic Motors (AREA)
US267710A 1971-07-20 1972-06-29 Gear pump Expired - Lifetime US3859014A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2136214A DE2136214C3 (de) 1971-07-20 1971-07-20 Zahnradpumpe oder -motor mit einem Kunststoffgehäuse und ein Verfahren zum Herstellen desselben

Publications (1)

Publication Number Publication Date
US3859014A true US3859014A (en) 1975-01-07

Family

ID=5814238

Family Applications (1)

Application Number Title Priority Date Filing Date
US267710A Expired - Lifetime US3859014A (en) 1971-07-20 1972-06-29 Gear pump

Country Status (6)

Country Link
US (1) US3859014A (it)
JP (1) JPS5536837B1 (it)
DE (1) DE2136214C3 (it)
FR (1) FR2146813A5 (it)
GB (1) GB1382624A (it)
IT (1) IT962848B (it)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747762A (en) * 1983-01-10 1988-05-31 Fairbairn International Pty. Ltd. Fluid machine
US4865517A (en) * 1988-07-11 1989-09-12 Heil-Quaker Corporation Blower with clam shell housing
US6325604B1 (en) * 2000-03-29 2001-12-04 Benjamin R. Du Plastic gear pump housing
US20060051230A1 (en) * 2003-02-17 2006-03-09 Martin Jordan Hydraulic pump for a power steering system
US20080038138A1 (en) * 2006-08-11 2008-02-14 Lee Bishop Rotary lobe pump
CN101994691A (zh) * 2010-09-30 2011-03-30 张良 一种齿轮泵液体增压设备及其生产工艺和用途
CN102808767A (zh) * 2011-06-02 2012-12-05 伊顿公司 简化的罗茨式鼓风机
US20140010697A1 (en) * 2012-05-15 2014-01-09 Sabic Innovative Plasticsip B.V. Polyetherimide pump
USD745056S1 (en) 2012-06-04 2015-12-08 Eaton Corporation Blower housing
CN105649975A (zh) * 2014-11-14 2016-06-08 北京航科发动机控制系统科技有限公司 一种一体式轴承
US11231033B2 (en) * 2017-05-10 2022-01-25 Kyb Corporation Cartridge vane pump and pump device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3541296A1 (de) * 1985-11-22 1987-05-27 Rudolf Bauer Pumpeinheit fuer fixierfluessigkeit
DE4214752C2 (de) * 1992-05-04 1994-04-07 Alexander Maute Ölpumpe
DE102007054401A1 (de) * 2007-11-14 2009-05-20 Robert Bosch Gmbh Flüssigkeitspumpe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2202913A (en) * 1938-03-18 1940-06-04 Pump Engineering Service Corp Gear pump
US2519588A (en) * 1943-12-24 1950-08-22 Borg Warner Pump housing
US2966860A (en) * 1957-04-03 1961-01-03 Lobee Pump & Machinery Co Pump for corrosive fluids
US3128710A (en) * 1960-09-19 1964-04-14 Oscar C Blomgren Gear pump
US3294028A (en) * 1964-12-23 1966-12-27 Borg Warner Pressure loaded gear pump
US3390638A (en) * 1966-08-08 1968-07-02 Power Engineering Inc Variable proportioning metering pump
US3433168A (en) * 1967-01-13 1969-03-18 Meyer Products Inc Gear pump with takeup for wear

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2202913A (en) * 1938-03-18 1940-06-04 Pump Engineering Service Corp Gear pump
US2519588A (en) * 1943-12-24 1950-08-22 Borg Warner Pump housing
US2966860A (en) * 1957-04-03 1961-01-03 Lobee Pump & Machinery Co Pump for corrosive fluids
US3128710A (en) * 1960-09-19 1964-04-14 Oscar C Blomgren Gear pump
US3294028A (en) * 1964-12-23 1966-12-27 Borg Warner Pressure loaded gear pump
US3390638A (en) * 1966-08-08 1968-07-02 Power Engineering Inc Variable proportioning metering pump
US3433168A (en) * 1967-01-13 1969-03-18 Meyer Products Inc Gear pump with takeup for wear

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747762A (en) * 1983-01-10 1988-05-31 Fairbairn International Pty. Ltd. Fluid machine
US4865517A (en) * 1988-07-11 1989-09-12 Heil-Quaker Corporation Blower with clam shell housing
US6325604B1 (en) * 2000-03-29 2001-12-04 Benjamin R. Du Plastic gear pump housing
US20060051230A1 (en) * 2003-02-17 2006-03-09 Martin Jordan Hydraulic pump for a power steering system
US7488162B2 (en) 2003-02-17 2009-02-10 Trw Automotive Gmbh Hydraulic pump for a power steering system
US20080038138A1 (en) * 2006-08-11 2008-02-14 Lee Bishop Rotary lobe pump
US7857607B2 (en) * 2006-08-11 2010-12-28 Itt Manufacturing Enterprises, Inc. Rotary lobe pump
CN101994691A (zh) * 2010-09-30 2011-03-30 张良 一种齿轮泵液体增压设备及其生产工艺和用途
CN102808767A (zh) * 2011-06-02 2012-12-05 伊顿公司 简化的罗茨式鼓风机
WO2012167248A3 (en) * 2011-06-02 2013-07-18 Eaton Corporation Simplified roots-type blower
CN102808767B (zh) * 2011-06-02 2017-09-01 伊顿公司 简化的罗茨式鼓风机
US20140010697A1 (en) * 2012-05-15 2014-01-09 Sabic Innovative Plasticsip B.V. Polyetherimide pump
US9429149B2 (en) * 2012-05-15 2016-08-30 Sabic Global Technologies B.V. Polyetherimide pump
USD745056S1 (en) 2012-06-04 2015-12-08 Eaton Corporation Blower housing
CN105649975A (zh) * 2014-11-14 2016-06-08 北京航科发动机控制系统科技有限公司 一种一体式轴承
US11231033B2 (en) * 2017-05-10 2022-01-25 Kyb Corporation Cartridge vane pump and pump device

Also Published As

Publication number Publication date
DE2136214A1 (de) 1973-02-01
DE2136214B2 (de) 1979-04-19
JPS5536837B1 (it) 1980-09-24
DE2136214C3 (de) 1979-12-13
IT962848B (it) 1973-12-31
FR2146813A5 (it) 1973-03-02
GB1382624A (en) 1975-02-05

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