US3685927A - Liquid pump, particularly a fuel-oil pump - Google Patents

Liquid pump, particularly a fuel-oil pump Download PDF

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Publication number
US3685927A
US3685927A US89638A US3685927DA US3685927A US 3685927 A US3685927 A US 3685927A US 89638 A US89638 A US 89638A US 3685927D A US3685927D A US 3685927DA US 3685927 A US3685927 A US 3685927A
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US
United States
Prior art keywords
pump
passage
suction
nondecreasing
liquid
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
US89638A
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English (en)
Inventor
Jorgen Hartvig Petersen
Ingvard Mosby Madsen
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.)
Danfoss AS
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Danfoss AS
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
Priority claimed from DE19691957654 external-priority patent/DE1957654C3/de
Application filed by Danfoss AS filed Critical Danfoss AS
Application granted granted Critical
Publication of US3685927A publication Critical patent/US3685927A/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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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

Definitions

  • ABSTRACT relates to a pump of a type commonly used for oil burners having kidney shaped inlet and exhaust passages formed in a wall adjacent the pumping elements of the pump.
  • inlet passage means are provided having nondecreasing cross sections so as to maintain nondecreasing velocities of liquids flowing therein.
  • the invention relates to a liquid pump, particularly a fuel oil pump, in which a suction system is provided in front of the intake orifice, said system comprising at least two passages extending inwardly from a suction chamber and, optionally, an ante-chamber at their ends.
  • a liquid pump in which a suction system is provided in front of the intake orifice, which systemis formed between the end wall of the pump and a coverplate applied to said end wall.
  • the suction system' consists of three passages which extend radially inwards and are offset from each other at the same angular distances, these passages terminating at a circular antechamber, which in turn communicates with. the offcenter suction orifice.
  • a further advantage resides in the fact that the pump can be installed in virtually any position, if the pump-shaft is approximately horizontal, since even when the pump housing is turned, the mouth of at least one passage is submerged in the oil and the mouth of at least one further passage is immersed in any air that may be present.
  • the object of the invention is to eliminate as far as possible the causeof these oscillations and to suppress noise.
  • this object is achieved in accordance with the invention by so dimensioning the cross-sections of the suction system that the drawn-in liquid undergoes noappreciable reduction in velocity as compared with the velocity at which it enters the passages.
  • the ante-chamber is constituted by a passage which takes the form of part of an annulus.
  • the annularform offers the advantage that the cross-section is limited.
  • the form consisting of part of an annulus enables a definite direction of flow and a definite velocity to be imparted to the liquid. It isparticularly advantageous if the intake opening is located at the end of the passage of part-annular form. The liquid then flows through said passage to its end and is there received by the suctionorifice. No reversal of direction or stagnation are therefore to be expected.
  • Also of particular advantage is an arrangement of the suction system in which the direction of flow in the part-annular passage is the same as that in which the pump rotates. In this way, the change in the direction of flow of the liquidis kept at a low level; in particular, the passage of part-annular form can run. very closely alongside the pump, e.g. in theendfplate of the pump itself.
  • the passages enter the part-annular passage tangentially. This prevents a sudden change of direction in the flow of the liquid and thus the associated change'in velocity.
  • the first passage enters the part-annular passage at its beginning and the second passage enters at a point before the intake'orifice. The increase in velocity occurring near thesecond passage-mouth is permissible.
  • the suction orifice is of arcuate form, and a further passage terminates at a point roughly midway along'the arc.
  • the arcuate form of the suction orifice results in a large cross-section which enables the liquid to passinto the pump chambers with relatively little flow-resistance.
  • the large cross-section however means that a drop in pressure and velocity would occur in the part-annular passage towards the end of thearc. This is compensated by the liquid passed. in by'the further passage.
  • Manufacture is very considerably simplifiedby the shape of the suction orifice being substantially the same as a portion of the part-annular'passage, and by its length being substantially thev same as thelength of thesuction groove normally present in geared pumps.
  • FIG. 1 shows part of a longitudinal section through a fuel-oilpu'mp in accordance with the invention
  • FIG. 2. shows, on a greater scale, a plan view of the end-plate of the pump'on the line AA of FIG. 1.
  • the suction system 10 is shown in more detail in FIG. 2. It consists of a part-annular passage 19 and three passages 20, 21 and 22 which are connected tangentially to the part-annular passage 19and extend inwards from orifices 23, 24 and 25 respectively on the outer periphery of the end-plate 6.
  • the passages are formed by channels in the end-plate 6 which channels are closed ofi by the cover-plate 30 as far as the orifices 23 25 and the intake orifice 11.
  • the part-annular passage 19 begins at the mouth 26 of the first passage .20; its end 27 coincides with the intake orifice 11.
  • the mouth 28 of the second passage 21 is located between the mouth 26 and the intake orifice 11.
  • the mouth 29 of the third passage 22 is located midway along the arcuate intake orifice l 1.
  • the present embodiment the
  • a pump comprising a casing, fluid pumping elements rotatably mounted in saidcasing and having a suction inlet region, wall means adjacent said fluid pumping elements and having a recess adjacent to and in fluid communication with said suction inlet region, said casing defining a suction chamber, passage means to said recess, said passage means having substantially nondecreasing cross sections throughout to maintain nondecreasing velocities of fluids travelling from said suction chamber to said suction inlet regitm saidpassage means including a partial annular passage and t ree line ,exte di 'ons in tan e tial relation ereto,str lrnear l ye 8 38318 sections mg symmetrically arranged in equiangularly ,spaced relation to each other.
  • a pump according to claim 1 including a drive shaft connected to one of said elements, said partial annular passage being positioned so that the fluid flow therethrough is in the same direction of rotation as said drive shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Reciprocating Pumps (AREA)
US89638A 1969-11-17 1970-11-16 Liquid pump, particularly a fuel-oil pump Expired - Lifetime US3685927A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691957654 DE1957654C3 (de) 1969-11-17 Rotationskolbenpumpe für Flüssigkeiten, insbesondere Heizölpumpe

Publications (1)

Publication Number Publication Date
US3685927A true US3685927A (en) 1972-08-22

Family

ID=5751292

Family Applications (1)

Application Number Title Priority Date Filing Date
US89638A Expired - Lifetime US3685927A (en) 1969-11-17 1970-11-16 Liquid pump, particularly a fuel-oil pump

Country Status (13)

Country Link
US (1) US3685927A (de)
AT (1) AT305037B (de)
BE (1) BE758282A (de)
CA (1) CA930610A (de)
CH (1) CH525390A (de)
CS (1) CS173574B2 (de)
DK (1) DK127522B (de)
ES (1) ES384746A1 (de)
FR (1) FR2069570A5 (de)
GB (1) GB1337007A (de)
NL (1) NL7016305A (de)
RO (1) RO60518A (de)
SE (1) SE374806B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2937569A3 (de) * 2014-04-01 2015-12-30 Panasonic Intellectual Property Management Co., Ltd. Flüssigkeitspumpe und rankine-kreislaufvorrichtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499651B1 (fr) * 1981-02-11 1986-09-05 Poclain Hydraulics Sa Mecanisme hydraulique a carter muni d'un amortisseur des variations de pression a l'interieur du carter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474009A (en) * 1948-06-02 1949-06-21 Filtors Inc Oil filter and pump combination
US3008425A (en) * 1960-06-13 1961-11-14 Chambers George Harold Gear pump seal
US3162129A (en) * 1962-07-13 1964-12-22 Sundstrand Corp Two-stage fuel unit
US3291060A (en) * 1966-03-21 1966-12-13 Lucas Industries Ltd Gear pumps
US3427983A (en) * 1966-05-31 1969-02-18 Robert W Brundage Pressure balanced bearing loads in hydraulic devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474009A (en) * 1948-06-02 1949-06-21 Filtors Inc Oil filter and pump combination
US3008425A (en) * 1960-06-13 1961-11-14 Chambers George Harold Gear pump seal
US3162129A (en) * 1962-07-13 1964-12-22 Sundstrand Corp Two-stage fuel unit
US3291060A (en) * 1966-03-21 1966-12-13 Lucas Industries Ltd Gear pumps
US3427983A (en) * 1966-05-31 1969-02-18 Robert W Brundage Pressure balanced bearing loads in hydraulic devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2937569A3 (de) * 2014-04-01 2015-12-30 Panasonic Intellectual Property Management Co., Ltd. Flüssigkeitspumpe und rankine-kreislaufvorrichtung
US9850783B2 (en) 2014-04-01 2017-12-26 Panasonic Intellectual Property Management Co., Ltd. Liquid pump including a gas accumulation area and rankine cycle device including a liquid pump
EP3534003A3 (de) * 2014-04-01 2020-01-08 Panasonic Intellectual Property Management Co., Ltd. Flüssigkeitspumpe und rankine-kreislaufvorrichtung

Also Published As

Publication number Publication date
DE1957654B2 (de) 1976-04-15
DK127522B (da) 1973-11-19
BE758282A (fr) 1971-04-01
CS173574B2 (de) 1977-02-28
RO60518A (de) 1976-09-15
FR2069570A5 (de) 1971-09-03
SE374806B (de) 1975-03-17
CH525390A (de) 1972-07-15
DE1957654A1 (de) 1971-05-27
CA930610A (en) 1973-07-24
ES384746A1 (es) 1975-07-01
NL7016305A (de) 1971-05-19
AT305037B (de) 1973-02-12
GB1337007A (en) 1973-11-14

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