US3841804A - Floating plate for end clearance seal on gear pumps - Google Patents

Floating plate for end clearance seal on gear pumps Download PDF

Info

Publication number
US3841804A
US3841804A US00330867A US33086773A US3841804A US 3841804 A US3841804 A US 3841804A US 00330867 A US00330867 A US 00330867A US 33086773 A US33086773 A US 33086773A US 3841804 A US3841804 A US 3841804A
Authority
US
United States
Prior art keywords
gear
pressure
pump
plate
cavity
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
US00330867A
Other languages
English (en)
Inventor
G Drutchas
P Spencer
J Hovanchak
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.)
Northrop Grumman Space and Mission Systems Corp
Original Assignee
TRW 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23291643&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US3841804(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by TRW Inc filed Critical TRW Inc
Priority to US00330867A priority Critical patent/US3841804A/en
Priority to CA191,417A priority patent/CA1001897A/en
Priority to GB497174A priority patent/GB1451535A/en
Priority to IT20243/74A priority patent/IT1007264B/it
Priority to FR7404110A priority patent/FR2217569B1/fr
Priority to JP1612974A priority patent/JPS5326681B2/ja
Priority to DE19742406100 priority patent/DE2406100C3/de
Publication of US3841804A publication Critical patent/US3841804A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023—Axial sealings for working fluid
    • F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps

Definitions

  • a floating plate presents a flat flexible plate interface to the registering gear faces and a sealing pack means conforms elastically to bridge the drop-off between the gear height and the depth of the gear pocket in the housing gap between the edge of the pump casing axially adjacent the pumping chamber and a floating pressure plate so that a mechanical translation of pressure force may be uniformly applied to the floating pressure plate.
  • This invention relates generally to a pressure loaded pump and more particularly to an improved pressure loaded pump wherein a pressure plate is hydraulically loaded by means of a sealing pack.
  • the present invention eliminates the major objections of the prior art by utilizing a floating pressure plate which presents a flat, flexible plate interface to the adjoining registering gear faces.
  • a bimetal floating pressure plate is entered into the cavity adjacent to the gear faces and freely floats in the cavity with peripheral clearance between the plate perimeter and the cavity wall.
  • Sealing pack means are utilized and energized by means of pump generated pressure so that the drop-off between the gear height and the depth of the gear pocket gap between the edge of the pump casing axially adjacent the pumping chamber and a floating pressure plate is bridged to permit a mechanical translation of pressure force to be uniformly applied to the bimetallic pressure plate.
  • FIG. 1 is a cross-sectional view taken through a gear pump incorporating the principles of the present invention.
  • FIG. 2 is taken on the plane of line II-II of FIG. 1 and illustrates additional details of construction of the sealing means of the present invention.
  • FIG. 3 is a view taken on line III-III of FIG. I and illustrates additional details of the pressure sealing plate in its relationship to the pump cavity as provided in accordance with the principles of the present inventron.
  • FIG. 4 is an enlarged fragmentary cross sectional view generally similar in orientation to the view of FIG. I but illustrating additional details of the present invention.
  • the pump of the present invention has a housing 10 in which is formed a gear pocket cavity 11 having a depth indicated at H. There is received within the cavity 11 two external gears 12 and 13 which are in meshing relationship with one another and each of which has corresponding shaft portions 14 and 15 respectively which are appropriately journaled in shaft sleeve bearings 16.
  • the gears have a gear height indicated at H which is somewhat less than the height of the gear pocket 11 and indicated at H,, thereby leaving a socalled drop off represented by the dimension A D.
  • the pump of FIG. 1 is provided with the usual inlet and outlet and the gears 12 and 13 are rotatably driven and mesh with one another, thereby to carry fluid through the pumping cavity formed by the gear cavity 11 from the inlet to the outlet.
  • a floating plate is provided to overcome the major objections of the prior art.
  • the bimetal floating plate is indicated generally at 21 and it will be noted that the plate is received in the cavity 11 adjacent to the gear side faces shown at 22 and 23 respectively.
  • the plate 21 freely floats in the cavity 11, i.e., there is peripheral clearance between the plate 21 perimeter and the cavity wall 11.
  • the plate 21 may be a bimetallic plate including a sealing face 21a and a main backing body 21b.
  • the gear cavity 11 is closed by a cover member 24.
  • the cover member 24 has a radial wall 26 which engages against an adjoining radial wall 27 of the housing 10.
  • a three-piece pump composed of two headers and a center section tied together by bolts may be used in lieu of the two-piece pump shown in the embodiment.
  • the cover member 24 is recessed for accommodating a seal pack in accordance with the principles of the present invention.
  • there is generally ovaloidal-shaped recess 28 which is somewhat larger than the adjoining gear cavity 11.
  • the outer wall of the ovaloidal recess 28 is shown at 29 and extends generally axially to the deepest point of the recess, terminating in a generally radially extending wall 30. Spaced inwardly of the wall 29 is another generally axially extending wall 31.
  • the walls 29, 30 and 31 together form a channel which is peripherally continuous with respect to the ovaloidal recess 30.
  • the wall 31 is terminated by a radial wall 32 which is spaced inwardly of both the walls 29 and 31.
  • the cover 24 is additionally recessed as at 33, which recess 33 has a side wall 34 and an end wall 36.
  • a flexible paper-type member 40 Using the orientation of FIG. 4 and in ascending order from the pressure plate 21, there is first of all provided a flexible paper-type member 40.
  • One satisfactory form of material which can be used for the member 40 is that manufactured and sold under the trade name Nomex.
  • a steel plate 41 there is a steel plate 41.
  • a molded form of paper shown at 42 which may also be made of Nomex and completes the complement of parts that constitutes the sealing pack arrangement.
  • a rubber diaphragm is received in the recesses 30 and 33.
  • the diaphragm constitutes a sealing web which may be made of a suitable resilient material and is identified at 43.
  • the overall configuration of the diaphragm is similar to that of the pressure plate. Pressure from an opening 44 (FIG. I) connected to the pump outlet port enters a cavity provided by the recess 28, thereby energizing the molded legs L, and L of the rubber diaphragm 43 to seal it.
  • the rubber diaphragm 43 is constrained from extruding, or bulging out of its form through the supporting effect of the molded paper form 42.
  • the steel element 41 creates a deformable firm base for direct mechanical pressure on the element 40 which conforms elastically to bridge the gap or drop-off between the gear height H, and the depth of the pocket H represented by the dimension A D, so that a mechanical translation of pressure force may be uniformly applied to the bimetal plate 21.
  • the plate 21 is forced towards the low pressure cavity wall perimeter, thus stopping leakage around the perimeter surface designated at 5,.
  • the floating plate 21 can be loosely fit to the cavity 11 contour without inducing leakage around the perimeter of the plate 21 from the outlet to the inlet.
  • a housing having a radial wall and having a gear pocket cavity with a cavity wall of depth H a pair of gears in said gear pocket cavity having a gear height 1-1 of lesser height than H thereby leaving a drop-off A D between said radial wall and the side faces of the gears,
  • deformable firm base means in said channel conforming in shape to said channel and forming an elastically deformable bridging means to bridge the drop-off gap and A between the housing radial wall and the floating plate,
  • said deformable firm base means comprising a deflectable metal plate to bridge the gap and drop-off A 3.
  • a flexible paper member underlying said base means to help seal the bridging action of said base means.
  • said pressure means comprising a rubber diaphragm sealing web having legs responsive to pressure energization to seal the channel and acting as a motive surface for receiving pressure loading from the pump-generated pressure.
  • a molded paper form supporting and constraining the rubber diaphragm from extruding or bulging out of its form.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
US00330867A 1973-02-08 1973-02-08 Floating plate for end clearance seal on gear pumps Expired - Lifetime US3841804A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00330867A US3841804A (en) 1973-02-08 1973-02-08 Floating plate for end clearance seal on gear pumps
CA191,417A CA1001897A (en) 1973-02-08 1974-01-31 Floating plate for end clearance seal on gear pumps
GB497174A GB1451535A (en) 1973-02-08 1974-02-04 Externally-meshing gear pumps
IT20243/74A IT1007264B (it) 1973-02-08 1974-02-06 Piastra a movimento flottante per la tenuta ermetica nei con fronti di giochi di estremita in pompe ad ingranaggi
FR7404110A FR2217569B1 (enrdf_load_stackoverflow) 1973-02-08 1974-02-07
JP1612974A JPS5326681B2 (enrdf_load_stackoverflow) 1973-02-08 1974-02-08
DE19742406100 DE2406100C3 (de) 1973-02-08 1974-02-08 Dichtungspackung an einer Zahnradpumpe oder einem -motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00330867A US3841804A (en) 1973-02-08 1973-02-08 Floating plate for end clearance seal on gear pumps

Publications (1)

Publication Number Publication Date
US3841804A true US3841804A (en) 1974-10-15

Family

ID=23291643

Family Applications (1)

Application Number Title Priority Date Filing Date
US00330867A Expired - Lifetime US3841804A (en) 1973-02-08 1973-02-08 Floating plate for end clearance seal on gear pumps

Country Status (6)

Country Link
US (1) US3841804A (enrdf_load_stackoverflow)
JP (1) JPS5326681B2 (enrdf_load_stackoverflow)
CA (1) CA1001897A (enrdf_load_stackoverflow)
FR (1) FR2217569B1 (enrdf_load_stackoverflow)
GB (1) GB1451535A (enrdf_load_stackoverflow)
IT (1) IT1007264B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5961309A (en) * 1997-04-24 1999-10-05 Trw Inc. Gear pump with noise attenuation
US20060140811A1 (en) * 2003-07-14 2006-06-29 Josef Bachmann Gear pump having optimal axial play
CN103032313A (zh) * 2013-01-11 2013-04-10 徐州科源液压股份有限公司 超高压齿轮泵的浮动侧板
US8820433B2 (en) 2011-08-30 2014-09-02 Black & Decker Inc. Axially compact power tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6329181Y2 (enrdf_load_stackoverflow) * 1980-02-29 1988-08-05

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029739A (en) * 1958-07-09 1962-04-17 John L Nagely Gear pump or motor with radial pressure balancing means
US3050010A (en) * 1960-02-23 1962-08-21 Thompson Ramo Wooldridge Inc Pressure loaded pump
US3213800A (en) * 1965-05-04 1965-10-26 Webster Electric Co Inc Unitary wear plate and seal
US3336035A (en) * 1965-08-03 1967-08-15 Flexitallic Company Multiple passage gasket
US3482524A (en) * 1968-06-12 1969-12-09 Gen Signal Corp Pump or motor
US3499390A (en) * 1968-04-11 1970-03-10 Parker Hannifin Corp Rotary pump
US3679218A (en) * 1969-03-03 1972-07-25 Farnam Co F D Unitized valve plate, gaskets and the like

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE749529C (de) * 1938-12-22 1944-11-30 Zahnradpumpe als Benzineinspritzpumpe fuer Brennkraftmaschinen
FR1328621A (fr) * 1962-06-15 1963-05-31 Thompson Ramo Wooldridge Inc Pompe de direction assistée et cartouche d'étanchéité pour ladite pompe
US3294029A (en) * 1965-08-20 1966-12-27 Trw Inc Pressure balanced seal-pack for reversible pumps and motors
DE1958936C3 (de) * 1969-11-24 1979-03-08 Parker-Hannifin Corp., Cleveland, Ohio (V.St.A.) Druckausgleichsanordnung für eine mit zwei Zahnrädern versehene Außeneingriffszahnradpumpe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029739A (en) * 1958-07-09 1962-04-17 John L Nagely Gear pump or motor with radial pressure balancing means
US3050010A (en) * 1960-02-23 1962-08-21 Thompson Ramo Wooldridge Inc Pressure loaded pump
US3213800A (en) * 1965-05-04 1965-10-26 Webster Electric Co Inc Unitary wear plate and seal
US3336035A (en) * 1965-08-03 1967-08-15 Flexitallic Company Multiple passage gasket
US3499390A (en) * 1968-04-11 1970-03-10 Parker Hannifin Corp Rotary pump
US3482524A (en) * 1968-06-12 1969-12-09 Gen Signal Corp Pump or motor
US3679218A (en) * 1969-03-03 1972-07-25 Farnam Co F D Unitized valve plate, gaskets and the like

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5961309A (en) * 1997-04-24 1999-10-05 Trw Inc. Gear pump with noise attenuation
US20060140811A1 (en) * 2003-07-14 2006-06-29 Josef Bachmann Gear pump having optimal axial play
US7713041B2 (en) * 2003-07-14 2010-05-11 Gkn Sinter Metals Holding Gmbh Gear pump having optimal axial play
US20100239449A1 (en) * 2003-07-14 2010-09-23 Gkn Sinter Metals Holding Gmbh Gear Pump Having Optimal Axial Play
US7887309B2 (en) 2003-07-14 2011-02-15 Gkn Sinter Metals Holding Gmbh Gear pump having optimal axial play
US8820433B2 (en) 2011-08-30 2014-09-02 Black & Decker Inc. Axially compact power tool
CN103032313A (zh) * 2013-01-11 2013-04-10 徐州科源液压股份有限公司 超高压齿轮泵的浮动侧板
CN103032313B (zh) * 2013-01-11 2016-04-06 徐州科源液压股份有限公司 超高压齿轮泵的浮动侧板

Also Published As

Publication number Publication date
CA1001897A (en) 1976-12-21
FR2217569A1 (enrdf_load_stackoverflow) 1974-09-06
IT1007264B (it) 1976-10-30
GB1451535A (en) 1976-10-06
JPS5326681B2 (enrdf_load_stackoverflow) 1978-08-03
JPS49106604A (enrdf_load_stackoverflow) 1974-10-09
FR2217569B1 (enrdf_load_stackoverflow) 1978-06-30
DE2406100A1 (de) 1974-08-29
DE2406100B2 (de) 1977-02-17

Similar Documents

Publication Publication Date Title
US3050010A (en) Pressure loaded pump
US5316391A (en) Squeeze film damper seal
US2380783A (en) Pump structure
US2956512A (en) Hydraulic pump or motor
US2932254A (en) Gear pump
JPS5825876B2 (ja) 軸推力平衡装置
US5006049A (en) Peristaltic pump
US4453899A (en) Scroll type fluid displacement apparatus with reinforced wrap seals
US2824522A (en) Pump, pressure loaded with offset loading
US2540903A (en) Rubber seal for hydraulic motors
US4058321A (en) Oil seal construction for rotary mechanisms
US3841804A (en) Floating plate for end clearance seal on gear pumps
US4909714A (en) Pressure balanced external gear pump or motor of floating shaft type
US2923249A (en) Gear pump with pressure loaded end plate and with pressure loaded peripheral tooth sealing means
US4464101A (en) Seizure-free, highly fluid tight and lightweight vane compressor
US2756681A (en) Pressure loaded pump
US4443166A (en) Scroll fluid apparatus with an arcuate recess adjacent the stationary wrap
US3083645A (en) Gear pump or the like
US3309997A (en) Gear pump or motor
US3586465A (en) Internally toothed gear pump
US3068804A (en) Pressure loaded pump seal
US3433168A (en) Gear pump with takeup for wear
US3976407A (en) Fluid power converter side seal
US3097610A (en) Pump and motor construction
JPS6350556B2 (enrdf_load_stackoverflow)