US3661480A - Housing for gear pumps or motors - Google Patents

Housing for gear pumps or motors Download PDF

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Publication number
US3661480A
US3661480A US889280A US3661480DA US3661480A US 3661480 A US3661480 A US 3661480A US 889280 A US889280 A US 889280A US 3661480D A US3661480D A US 3661480DA US 3661480 A US3661480 A US 3661480A
Authority
US
United States
Prior art keywords
housing
bar
peripheral surface
section
outer peripheral
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
US889280A
Other languages
English (en)
Inventor
Friedrich Forschner
Hans Kurzhals
Karl-Heinz Muller
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 US3661480A publication Critical patent/US3661480A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49242—Screw or gear type, e.g., Moineau type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material
    • Y10T29/49996—Successive distinct removal operations

Definitions

  • the housing has a substantially cylindrical outer contour and a [52] Cl substantially oval cross section and an inner chamber which l 264/155 constitutes at least one longitudinal cylinder having at least 1 Int Cl B23 15/00 Bzlc 23/00 F010 1/18 one open end and surface lines which extend parallel with the [58] Fieid p 218/179 206 270 surface lines of the outer contour and perpendicular to the original line threads or flow lines of the extrusion profile section so as to improve the fatigue resistance and especially the tensile fatigue resistance of the housing.
  • the present invention relates; to a housing especially adapted for accommodating a gear pump or gear motor, and a method of manufacturing such a housing, the latter being made from a section of an extrusion profile and having, in essence, a cylindrical outer contour and, in particular, an oval cross section, and being formed with an inner chamber constituting at least one longitudinal cylinder with at least one open end and surface lines extending in parallelism with the surface lines of the outer contour.
  • a housing made from an aluminum alloy and used for accommodating a gear pump or a gear motor and is made as an unfinished casting from a section of an extrusion profile.
  • This housing has an inner chamber constituted by two, each other partly overlapping circularcylindrical bores, with the surface lines ofthe inner chamber extending in parallelism with the original line threads or flow lines of the section of the extrusion profile.
  • This housing which, during operation of the pump or motor, is subject to a strong continuous load of interval pressure, has the disadvantage that the greatest load of tensile stress is applied transversely to the direction of flow in the structure.
  • transverse resistance values" of the structure are less than the longitudinal resistance values" of the same, in particular as regards the fatigue resistance pattern or behavior.
  • Object of the present invention is to provide a housing especially for use for accommodating a gear pump or a gear motor and which, compared with conventional housings of such type and with the same material expenditure, has a considerably increased fatigue resistance, in particular the tensile fatigue resistance.
  • this is accomplished by arranging the surface lines of the inner chamber of the housing such that they extend perpendicular relative to the original line threads or flow lines of the extrusion profile section from which the housing is made.
  • the original line threads are flow lines of the extrusion profile section extend in direction of one of the main axes of the curve which bounds the cross section of the housing, in particular the novel cross section of the housing according to the invention.
  • Such a housing according to the invention is manufactured by producing the outer contour of the housing in a noncutting conventional pressing or molding device and with the pressing or molding direction oriented perpendicular to the original line threads or flow lines of the extrusion profile section.
  • FIG. 1 shows a final pressed housing according to the present invention
  • FIG. 2 shows a further embodiment of a further housing according to thepresent invention.
  • FIG. 3 shows a section of a blank of an extrusion profile from which the respective housings of FIGS. 1 and 2 are formed.
  • the outer contour of the housing 1, in cross section, is substantially oval, and the straight major-lateral surfaces of the housing are provided with outwardly projecting flange portions 5, 6. Seen in cross-sectional view, both ends of the flange portions 5, 6 are provided with convex transition faces.
  • the housing 1 is seen to comprise the schematically shown line-threads 7 which originate from the border zones of the heterogeneities of the (former) cast center of the structure.
  • the line threads 7 in the finished housing I extend in direction of the empirically formed maximum tensile stressesa Z max I,illustrated by the double arrow and which-occur during operation of the pump or motor.
  • This pattern of the line threads 7 results from the reshaping process by which the outer contour of the housing I is constituted.
  • FIG. 2 A further embodiment of the present invention is shown in FIG. 2.
  • the shape of the housing 11 is similar to that of FIG. 1, however, the individual dimensions of the respective lines have an inter relationship which is different from their counterparts shown in FIG. I.
  • FIG. 2 Shown in FIG. 2 are the line threads 17 whose main direction, in this embodiment, is parallel with the minor center axis 19.
  • FIG. 3 Shown in FIG. 3 is a blank 20 which is used for the manufacture of the respective housings shown in FIGS. 1, 2, and which is cut from a strand of extrusion profile at a desired length.
  • the schematically shown line threads 24 extend in direction in which the strand is extruded.
  • the blank 20 is introduced into a desired and conventionally constituted matrix, not shown, in such a manner that the line threads are oriented in a required direction.
  • the inner chamber 2 of the housing of FIG. 1 is then formed, without cutting, by applying and pressing with a punch which has a cross section corresponding to that of the inner chamber 2.
  • the excess material is pressed outwardly such that the originally rectangular blank is formed with the two round minor surfaces 10, 11 and the transition surfaces between the two flange portions 5 and 6.
  • the blank 20 is introduced into the matrix with the line threads 24 extending in the required direction, upon which the punch is again perpendicularly applied to the upper surface and the original line threads in the blank and is compelled to form the inner chamber 2 and thereby the outer contour of the housing.
  • the housing in solid condition, i.e., without the inner chamber 2.
  • first the pressing of the outer contour of the housing isinitiated and effected in a conventional matrix with the extrusion profile section and the line threads 24 embedded therein, oriented in the desired direction.
  • the pressing step proceeds and is directed in a .direction perpendicular to the original line threads 24 of the extrusion profile.
  • the inner chamber 2 is then machined in the solid housing blank.
  • a housing particularly for gear pumps or gear motors said housing comprising a metal shell having an internal flow line structure in which the flow lines extend substantially in one direction, said shell having. an outer peripheral surface and an inner peripheral surface bounding an inner cavity of said housing and open at least at one end thereof, the generatrices of said surfaces extending transversely to said flow lines.
  • said inner cavity comprises a substantially cylindrical surface of non-circular cross section having a major and a minor axis with one of said axes coincident with the original direction of said flow lines.
  • a method of making a housing comprising the steps of, extruding an elongated bar of material characteristic; forming in said bar an interval cavity having an inner peripheral surface, and forming at the exterior of said bar an outer peripheral surface of desiredcontour, with the generatrices of both of said surfaces extending transversely to the elongation of said bar and thereby to the original direction of extrusion of said bar.
  • step of forming said outer peripheral surface comprises exerting pressure on the outer side of said bar in direction normal to said elongation to thereby deform the material of said bar to the shape of the desired outer peripheral surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)
US889280A 1969-01-16 1969-12-30 Housing for gear pumps or motors Expired - Lifetime US3661480A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691901964 DE1901964A1 (de) 1969-01-16 1969-01-16 Gehaeuse,insbesondere fuer eine Zahnradmaschine,und Verfahren zu dessen Herstellung

Publications (1)

Publication Number Publication Date
US3661480A true US3661480A (en) 1972-05-09

Family

ID=5722520

Family Applications (1)

Application Number Title Priority Date Filing Date
US889280A Expired - Lifetime US3661480A (en) 1969-01-16 1969-12-30 Housing for gear pumps or motors

Country Status (8)

Country Link
US (1) US3661480A (de)
JP (1) JPS4819122B1 (de)
AT (1) AT306493B (de)
CH (1) CH511393A (de)
DE (1) DE1901964A1 (de)
FR (1) FR2028417A1 (de)
GB (1) GB1285141A (de)
RO (1) RO55221A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785028A (en) * 1971-02-10 1974-01-15 Haas C Fa Process for the production of hubs for spiral springs of timepieces
US4055978A (en) * 1975-04-10 1977-11-01 Talleres Diesel, S.A. Procedure for manufacturing hydraulic plunger-type pump bodies
US4636146A (en) * 1985-06-04 1987-01-13 Kraenzle Josef Axial plunger pump
US4864705A (en) * 1988-11-04 1989-09-12 Tecumseh Products Company Method of making a carburetor
US5100046A (en) * 1989-04-21 1992-03-31 Kihn S.A.R.L. Monobloc points for grooved rails and method for making same
US5154867A (en) * 1988-06-27 1992-10-13 Edwards Billy J Method of constructing an ultra-high molecular weight polyethylene sucker rod guide
US5163825A (en) * 1991-04-03 1992-11-17 Oetting Roy E Articulated vane fluid driven motor
USRE34224E (en) * 1988-11-04 1993-04-20 Tecumseh Products Company Method of making a carburetor
US6092283A (en) * 1995-10-18 2000-07-25 Caterpillar Inc. Method and apparatus for producing a gear pump
US6158997A (en) * 1999-06-30 2000-12-12 Fluid Management Gear pump
US6493922B2 (en) * 2000-05-09 2002-12-17 Metolius Mountain Products, Inc. Climbing nut
US6877260B1 (en) * 1999-07-31 2005-04-12 Rowenta-Werke Gmbh Iron skirt
WO2006069868A1 (de) * 2004-12-23 2006-07-06 Robert Bosch Gmbh Flüssigkeitspumpe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018111059A1 (de) * 2018-05-08 2019-11-14 Speck-Kolbenpumpenfabrik Otto Speck Gmbh & Co Kg Antrieb für eine kolbenpumpe oder einen -kompressor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133506A (en) * 1961-08-15 1964-05-19 Luciani Louis Gear pump having internal bearings and seals
US3376824A (en) * 1965-07-01 1968-04-09 Turolla Marco Gear pump
US3463089A (en) * 1966-10-07 1969-08-26 Plessey Co Ltd High-pressure gear pumps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133506A (en) * 1961-08-15 1964-05-19 Luciani Louis Gear pump having internal bearings and seals
US3376824A (en) * 1965-07-01 1968-04-09 Turolla Marco Gear pump
US3463089A (en) * 1966-10-07 1969-08-26 Plessey Co Ltd High-pressure gear pumps

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785028A (en) * 1971-02-10 1974-01-15 Haas C Fa Process for the production of hubs for spiral springs of timepieces
US4055978A (en) * 1975-04-10 1977-11-01 Talleres Diesel, S.A. Procedure for manufacturing hydraulic plunger-type pump bodies
US4636146A (en) * 1985-06-04 1987-01-13 Kraenzle Josef Axial plunger pump
US5154867A (en) * 1988-06-27 1992-10-13 Edwards Billy J Method of constructing an ultra-high molecular weight polyethylene sucker rod guide
USRE34224E (en) * 1988-11-04 1993-04-20 Tecumseh Products Company Method of making a carburetor
US4864705A (en) * 1988-11-04 1989-09-12 Tecumseh Products Company Method of making a carburetor
US5100046A (en) * 1989-04-21 1992-03-31 Kihn S.A.R.L. Monobloc points for grooved rails and method for making same
US5163825A (en) * 1991-04-03 1992-11-17 Oetting Roy E Articulated vane fluid driven motor
US6092283A (en) * 1995-10-18 2000-07-25 Caterpillar Inc. Method and apparatus for producing a gear pump
US6158997A (en) * 1999-06-30 2000-12-12 Fluid Management Gear pump
US6877260B1 (en) * 1999-07-31 2005-04-12 Rowenta-Werke Gmbh Iron skirt
US6493922B2 (en) * 2000-05-09 2002-12-17 Metolius Mountain Products, Inc. Climbing nut
WO2006069868A1 (de) * 2004-12-23 2006-07-06 Robert Bosch Gmbh Flüssigkeitspumpe

Also Published As

Publication number Publication date
CH511393A (de) 1971-08-15
GB1285141A (en) 1972-08-09
JPS4819122B1 (de) 1973-06-11
RO55221A (de) 1973-05-17
AT306493B (de) 1973-04-10
DE1901964A1 (de) 1970-08-27
FR2028417A1 (de) 1970-10-09

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