GB578809A - Improvements in gear pumps - Google Patents

Improvements in gear pumps

Info

Publication number
GB578809A
GB578809A GB321744A GB321744A GB578809A GB 578809 A GB578809 A GB 578809A GB 321744 A GB321744 A GB 321744A GB 321744 A GB321744 A GB 321744A GB 578809 A GB578809 A GB 578809A
Authority
GB
United Kingdom
Prior art keywords
gears
gear
grooves
sleeves
teeth
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
Application number
GB321744A
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.)
PREC DEVELOPMENTS CO Ltd
Original Assignee
PREC DEVELOPMENTS CO Ltd
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 PREC DEVELOPMENTS CO Ltd filed Critical PREC DEVELOPMENTS CO Ltd
Priority to GB321744A priority Critical patent/GB578809A/en
Publication of GB578809A publication Critical patent/GB578809A/en
Expired legal-status Critical Current

Links

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
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0046—Internal leakage control
    • 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
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

578,809. Gear pumps. PRECISION DEVELOPMENTS CO., Ltd., and OLAH, G. Feb. 21, 1944, No. 3217. [Class 110 (ii)] Excessive hydraulic pressure due to trapping of fluid between gear teeth is avoided by arranging that, whenever two pairs of teeth are simultaneously in contact, the contact point on the entering pair of teeth is nearer to the pitch point than the point at which the teeth of the preceding pair are simultaneously in contact with each other. For involute gears the addendum of the driving gear is made greater than that of the driven gear. Hydraulic sealing between the non-driving tooth flanks is prevented by provision of backlash or by chamfering the edge of the flanks. The driving gear 11 is integral with a hollow shaft which is journalled in two central sleeves 10, 12. The driven gears 51, 52 rotate on stationary shafts 71, 72 located in sleeves 4, 6 and 14, 16 respectively. The sleeves are located in three interconnecting bores, in the main body 1, (which also serve as enveloping surfaces for the outer peripheries of the gears. Inlet slots I<1>-I<4> connected to an inlet hole 44 and outlet slots O<1>-O<4> connected to an outlet hole 45, equalize the fluid pressures on the gears. Neck portions on the sleeves and countersinks in the end covers 2, 21, together form annular spaces 42 which are interconnected by means of grooves 41 formed in the end covers, Fig. 7. Cross bores 43 connect the grooves in one end cover with the inlet slots I<1>, I<2> and the grooves in the other end cover with the outlet slots O<1>, O<2>. Leakage is collected into a hollow stud 18 from grooves 46 worked all round the gears in the main body. The driving shaft 31 is supported in a self-aligning ball-bearing 35 and is connected to gear 11 by means of a dog-clutch 37.
GB321744A 1944-02-21 1944-02-21 Improvements in gear pumps Expired GB578809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB321744A GB578809A (en) 1944-02-21 1944-02-21 Improvements in gear pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB321744A GB578809A (en) 1944-02-21 1944-02-21 Improvements in gear pumps

Publications (1)

Publication Number Publication Date
GB578809A true GB578809A (en) 1946-07-12

Family

ID=9754162

Family Applications (1)

Application Number Title Priority Date Filing Date
GB321744A Expired GB578809A (en) 1944-02-21 1944-02-21 Improvements in gear pumps

Country Status (1)

Country Link
GB (1) GB578809A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2845031A (en) * 1953-01-13 1958-07-29 Francis W Guibert Gear tooth construction for rotary fluid meters
US2988009A (en) * 1956-07-23 1961-06-13 Jr Frederick Kraissl External gear pump
US3076413A (en) * 1959-12-29 1963-02-05 Parker Hannifin Corp High pressure aircraft gear pump
US3164099A (en) * 1961-08-09 1965-01-05 Iyoi Hitosi Toothed profiles of rotors of gear pump
US3303792A (en) * 1964-04-20 1967-02-14 Roper Ind Inc Gear pump with trapping reliefs
US3439625A (en) * 1966-03-23 1969-04-22 Lucas Industries Ltd Gear pumps
US3981646A (en) * 1973-03-15 1976-09-21 Lucas Aerospace Limited Gear pumps and motors
US4233005A (en) * 1978-01-18 1980-11-11 Lucas Industries Limited Hydraulic gear pump with recesses in non-working gear flanks
WO1993011357A1 (en) * 1991-11-27 1993-06-10 John S. Barnes Gmbh Geared machine
EP0780575A1 (en) * 1995-12-23 1997-06-25 Robert Bosch Gmbh Gear machine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2845031A (en) * 1953-01-13 1958-07-29 Francis W Guibert Gear tooth construction for rotary fluid meters
US2988009A (en) * 1956-07-23 1961-06-13 Jr Frederick Kraissl External gear pump
US3076413A (en) * 1959-12-29 1963-02-05 Parker Hannifin Corp High pressure aircraft gear pump
US3164099A (en) * 1961-08-09 1965-01-05 Iyoi Hitosi Toothed profiles of rotors of gear pump
US3303792A (en) * 1964-04-20 1967-02-14 Roper Ind Inc Gear pump with trapping reliefs
US3439625A (en) * 1966-03-23 1969-04-22 Lucas Industries Ltd Gear pumps
US3981646A (en) * 1973-03-15 1976-09-21 Lucas Aerospace Limited Gear pumps and motors
US4233005A (en) * 1978-01-18 1980-11-11 Lucas Industries Limited Hydraulic gear pump with recesses in non-working gear flanks
WO1993011357A1 (en) * 1991-11-27 1993-06-10 John S. Barnes Gmbh Geared machine
EP0780575A1 (en) * 1995-12-23 1997-06-25 Robert Bosch Gmbh Gear machine

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