US3502033A - Gear pump - Google Patents

Gear pump Download PDF

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Publication number
US3502033A
US3502033A US786263A US3502033DA US3502033A US 3502033 A US3502033 A US 3502033A US 786263 A US786263 A US 786263A US 3502033D A US3502033D A US 3502033DA US 3502033 A US3502033 A US 3502033A
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US
United States
Prior art keywords
gear
passage
gears
shaft
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.)
Expired - Lifetime
Application number
US786263A
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English (en)
Inventor
Felix Kaczrowski
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.)
Oerlikon Barmag AG
Original Assignee
Barmag Barmer Maschinenfabrik AG
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 Barmag Barmer Maschinenfabrik AG filed Critical Barmag Barmer Maschinenfabrik AG
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Publication of US3502033A publication Critical patent/US3502033A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms

Definitions

  • Patent 2,818,023 a gear pump is shown, in the casing of which the fluid outlet passage of the pump in FIG. leads through the back wall up to the cover plate. Here it turns parallel to this cover plate in the form of a channel formed in the back wall and directed away from the outlet side. It ultimately leads to a tubular journal.
  • the medium conveyed by the right set of pumps covers a very long distance in the pump casing. This results in decomposition of heat-sensitive plastic material, and, in any case, in denier differences in the filaments emerging from the nozzels.
  • a gear pump consisting of two sets of pumps is described. The two driven gear wheels are respectively set up on a shaft.
  • Both shafts are set up in a bore of the pump casing.
  • the fluid entrance takes place from the surface opposite to the driving side through a blind-end bore which is placed into the hollow shaft facing this surface.
  • a radial bore in this shaft connects the blind-end bore with the further passage in the middle portion of the pump casing. The manufacture and assembly of this shaft is very expensive.
  • the primary objects of this invention concern gear pumps having a casing with discharge passages wherein the routes of the pumped liquid are short for all sets of gears and wherein the parts can be easily produced and assembled.
  • This discharge lines of at least one set of gears in the pump casing are. set up in such a manner that they are oriented relative to the respective discharges into an intermediate plate of the casing in the direction of the outlet opening and from this intermediate plate, in passages completely separated from the gears, rectilinearly to the casing bores which receive the hollow journal shafts.
  • the hollow shafts of the driven gears are mounted in bores in the casing and are stub shafts extending an axial distance in the. bores which are at least equal to the diameter or the width of the respective discharge lines immediately preceding such bores. In this manner, without expensive machining, a very short connection is provided between the outlet or discharge side of each pair and the respective discharge opening in the casing.
  • FIG. 1 and FIG. 2 are section views of a first embodiment, taken respectively on section planes 11 of FIG. 2 and 22 of FIG. 1;
  • FIG. 3 and FIG. 4 are section views of a second embodiment, taken respectively on section planes 33 of FIG. 4 and 4-4 of FIG-3;
  • FIG. 5 and FIG. 6 are section views of a third embodiment of the invention, taken respectively on section planes 55 of FIG. 6 and 66 of FIG. 5.
  • FIGS. 1 and 2 is a gear pump 10 having a front, discharge plate 11 and a rear, feed plate 12. A plurality of intermediate plates 13, 14, 15 and 16 are sandwiched between plates 11 and 12. The six plates 1116 are tightly pressed together in face-to-face relationship by four bolts 17 extending transversely therethrough.
  • the intermediate plate 13 has a pair of intersecting, substantially circular openings 18 and 19 which respectively receive a gear pair set later described.
  • the intermediate plate 16 has a similar pair of intersecting, circular holes 20 and 21 which receive a second gear pair set, also later described.
  • the plates 11-16 are provided with axially aligned holes providing an axial passage 22, which receives and rotatably journals therein the drive shaft 23. These plates also have a second series of axially aligned holes which together form an axial passage 24, parallel to the passage 22.
  • the portion of the passage 24 in the plates 12, 13 and 14 receive a stub shaft 25, which may be tightly seated therein or may be rotatably journaled therein.
  • the portion of the passage .24 in the plates 11, 15 and 16 receives a tubular or hollow shaft 26, which preferably is tightly seated therein.
  • the drive shaft 23 rotatably drives the gears 27 and 29, which are splined thereon by the adjusting springs 28 and 30, respectively.
  • the gear teeth 31 of the gears 27 and 29 mesh with the gear teeth 32 of the driven gears 33 and 34, which are rotatably journaled on or by the stub shaft 25 and 26.
  • the gear pump of FIGS. 1 and 2 comprises a casing containing two gear pair sets.
  • the gear pair sets have their discharge passages below the central, intermeshing section thereof.
  • the fluid enters the pump through an inlet passage 35 which extends through the rear plate 12, intersects laterally the holes 18 and 19, extends through the intermediate plates 14 and 15 and intersects the holes 20 and 21 laterally.
  • the passage 35 is an inlet manifold passage for both gear pair sets. It is impelled from this passage by the teeth of the respective gears around the outer peripheries of the holes 18-21 to the discharge passages.
  • the fluid on the discharge side of the gear pair set 29 and 34 is discharged into the outlet passage 38.
  • the shallow depressions 36 and 37 extending from the discharge outlet 38 function as pressure relief clearances for fluid entrapped between meshing gear teeth.
  • the fluid on the discharge side of the gear pair set 27 and 33 is discharged into the passage 41 and flows into a radial passage 42 formed by machining a recess or groove in the face 46 of the intermediate plate 14.
  • the shallow d:- pressions 32 and 40 extending from the discharge outlet 41 again function as pressure relief clearances for fluid entrapped between meshing gear teeth.
  • the recess or groove machined into the intermediate plate 14, together with the opposing face 47 of intermediate plate 15 forms the endosed passage 42.
  • the passage 42 intersects at the opening 43 the free space 44 located between the stub shaft 25 and the hollow stub shaft 26.
  • the free space 44 in turn communicates with the discharge passage 45 formed by the tubular stub shaft 26.
  • the shallow depressions 36, 37, 39, 40, the passages 38, 40, 41, 42, space 44 and passage 45 can be made by simple machining operations in the appropriate plates forming the casing 10.
  • FIGS. 3 and 4 The embodiment of FIGS. 3 and 4 is similar in most respects to the embodiment of FIGS. 1 and 2. Where applicable, like numerals designate like parts.
  • the gear pump 10a illustrated in FIGS. 3 and 4 differs primarily in the orientation of the passage connecting the fluid outlet passage 40 with the space 44.
  • the connecting passage 48 is a diagonal bore which intersects the space 44 at the opening 49 and intersects the passage 40 at the opposite end thereof.
  • FIGS. and 6 The embodiment illustrated in FIGS. and 6 is similar in most respects to the embodiment of FIGS. 1 and 2.
  • the pump b has within its casing four gear pair sets instead of two, all of which are driven from the common drive shaft 23a.
  • like numerals designate like parts and in the remainder of instances the numerals followed by the letters a and b find their counterpart in the parts designated by numerals only in FIGS. 1 and 2.
  • a gear pump comprising a pump housing formed by juxtaposed plates in face-to-face relationship, means in two, separate intermediate plates forming at least two pumping chambers, a pair of intermeshed gears in each chamber, a drive shaft extending transversely through said plates and connected to one gear of each pair of gears for rotatably driving said gears, a tubular stud shaft extending transversely from an outer face of said casing through one chamber, the driven gear in said one chamber being rotatably journalled on said tubular shaft, liquid discharge passage means communicating with the other chamber and extending transversely across the intermediate plate containing said other chamber, a solid stub shaft axially aligned with said tubular stub shaft and exdriven gear in said other chamber being rotatably mounted on said solid stub shaft, the opposed ends of said shafts having a space therebetween, and additional passage means in an intermediate plate between said pumping chambers and connecting said liquid discharge passage means and said space to provide a path of flow of pumped liquid from said other chamber via said additional
  • a gear pump comprising a pump housing formed by juxtaposed plates in face-to-face relationship, means in two, separate intermediate plates forming at least two pumping chambers, a pair of additional intermediate plates between said separate intermediate plates, a pair of intermeshed gears in each chamber, a drive shaft extending transversely through said plates and connected to one gear of each pair of gears for rotatably driving said gears, a tubular shaft extending transversely from an outer face of said casing through one chamber, the driven gear in said one chamber being rotatably journalled thereon, a liquid discharge passage communicating with the other chamber and extending transversely across the intermediate plate containing said other chamber, a groove in only one of the contacting faces of said additional intermediate plates, said groove extending from said liquid discharge passage to said tubular shaft and thereby providing a passage for pumped liquid from said other chamber into said tubular shaft.
  • a gear pump as claimed in claim 6, a solid stub shaft axially aligned with said tubular stub shaft and extending transversely through said other chamber, the driven gear in said other chamber being rotatably mounted on said solid stub shaft, the opposed ends of said shafts having a space therebetween, and said groove communicating with said space to provide a passage for flow of pumped liquid from said other chamber via said groove and said space into said tubular shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • External Artificial Organs (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US786263A 1967-12-23 1968-12-23 Gear pump Expired - Lifetime US3502033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0073964 1967-12-23

Publications (1)

Publication Number Publication Date
US3502033A true US3502033A (en) 1970-03-24

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ID=6978060

Family Applications (1)

Application Number Title Priority Date Filing Date
US786263A Expired - Lifetime US3502033A (en) 1967-12-23 1968-12-23 Gear pump

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Country Link
US (1) US3502033A (enrdf_load_stackoverflow)
GB (1) GB1252746A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020354A4 (en) * 1978-12-26 1980-11-14 Caterpillar Tractor Co HYDRAULIC PUMP STRUCTURE WITH MANIFOLD ASSEMBLY.
DE4305905C1 (de) * 1993-02-26 1994-07-28 Barmag Barmer Maschf Spinnpumpe mit Mischer
US5637331A (en) * 1993-02-18 1997-06-10 Barmag Ag Spin system for thermoplastic yarns
US6824733B2 (en) 2002-06-20 2004-11-30 3M Innovative Properties Company Meltblowing apparatus employing planetary gear metering pump
WO2011076172A3 (de) * 2009-12-21 2012-08-02 Schaeffler Technologies AG & Co. KG Hydrauliksteuerung
WO2011146099A3 (en) * 2010-05-18 2013-03-21 Illinois Tool Works Inc. Metering pump or segment, and metering pump assembly comprising a plurality of metering pumps or segments
US20160108914A1 (en) * 2014-10-16 2016-04-21 Johnson Electric S.A. Gear pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE169307T1 (de) * 1984-05-18 1986-07-24 Nordson Corp., Amherst, Ohio Pumpe fuer heissschmelzklebstoffe mit durchlaesse aufweisenden zahnraedern.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2207493A (en) * 1936-07-09 1940-07-09 Deutsche Waffen & Munitionsfab Means for feeding a continuously uniform quantity of fluids
US2533320A (en) * 1949-01-04 1950-12-12 Du Pont Rotary gear-type metering pump
US2685839A (en) * 1950-11-01 1954-08-10 American Viscose Corp Pump
US2818023A (en) * 1954-06-17 1957-12-31 Nichols Co W H Metering pump
US3314369A (en) * 1965-10-05 1967-04-18 Kawasaki Kokuki Kogyo Kabushik Dual gear pumps

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2207493A (en) * 1936-07-09 1940-07-09 Deutsche Waffen & Munitionsfab Means for feeding a continuously uniform quantity of fluids
US2533320A (en) * 1949-01-04 1950-12-12 Du Pont Rotary gear-type metering pump
US2685839A (en) * 1950-11-01 1954-08-10 American Viscose Corp Pump
US2818023A (en) * 1954-06-17 1957-12-31 Nichols Co W H Metering pump
US3314369A (en) * 1965-10-05 1967-04-18 Kawasaki Kokuki Kogyo Kabushik Dual gear pumps

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020354A4 (en) * 1978-12-26 1980-11-14 Caterpillar Tractor Co HYDRAULIC PUMP STRUCTURE WITH MANIFOLD ASSEMBLY.
US5637331A (en) * 1993-02-18 1997-06-10 Barmag Ag Spin system for thermoplastic yarns
DE4305905C1 (de) * 1993-02-26 1994-07-28 Barmag Barmer Maschf Spinnpumpe mit Mischer
US6824733B2 (en) 2002-06-20 2004-11-30 3M Innovative Properties Company Meltblowing apparatus employing planetary gear metering pump
CN102713296B (zh) * 2009-12-21 2015-11-25 舍弗勒技术股份两合公司 液压控制设备
CN102713296A (zh) * 2009-12-21 2012-10-03 舍弗勒技术股份两合公司 液压控制设备
WO2011076172A3 (de) * 2009-12-21 2012-08-02 Schaeffler Technologies AG & Co. KG Hydrauliksteuerung
WO2011146099A3 (en) * 2010-05-18 2013-03-21 Illinois Tool Works Inc. Metering pump or segment, and metering pump assembly comprising a plurality of metering pumps or segments
JP2013528256A (ja) * 2010-05-18 2013-07-08 イリノイ トゥール ワークス インコーポレイティド 歯車式計量ポンプセグメント、および、複数の歯車式計量ポンプセグメントを備えた歯車式計量ポンプ組立体
CN103249951A (zh) * 2010-05-18 2013-08-14 伊利诺斯工具制品有限公司 计量泵或计量段以及包括多个计量泵或计量段的计量泵总成
CN103249951B (zh) * 2010-05-18 2016-06-08 伊利诺斯工具制品有限公司 计量泵或计量段以及包括多个计量泵或计量段的计量泵总成
US20160108914A1 (en) * 2014-10-16 2016-04-21 Johnson Electric S.A. Gear pump
US10415566B2 (en) * 2014-10-16 2019-09-17 Johnson Electric International AG Gear pump
US10612545B2 (en) 2014-10-16 2020-04-07 Johnson Electric International AG Gear pump

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Publication number Publication date
GB1252746A (enrdf_load_stackoverflow) 1971-11-10

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