EP1156220A2 - Pompe à engrenages internes - Google Patents

Pompe à engrenages internes Download PDF

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Publication number
EP1156220A2
EP1156220A2 EP01111179A EP01111179A EP1156220A2 EP 1156220 A2 EP1156220 A2 EP 1156220A2 EP 01111179 A EP01111179 A EP 01111179A EP 01111179 A EP01111179 A EP 01111179A EP 1156220 A2 EP1156220 A2 EP 1156220A2
Authority
EP
European Patent Office
Prior art keywords
pump according
duct
fuel oil
selection device
holes
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.)
Withdrawn
Application number
EP01111179A
Other languages
German (de)
English (en)
Other versions
EP1156220A3 (fr
Inventor
Alessandro Granzotto
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.)
Elettromeccanica Delta SpA
Original Assignee
Elettromeccanica Delta SpA
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 Elettromeccanica Delta SpA filed Critical Elettromeccanica Delta SpA
Publication of EP1156220A2 publication Critical patent/EP1156220A2/fr
Publication of EP1156220A3 publication Critical patent/EP1156220A3/fr
Withdrawn legal-status Critical Current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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods

Definitions

  • the present invention relates to a pump particularly usable for burners which use fuel oil and therefore, such as gas oil and kerosene.
  • the combustion process entails that the flame is started and sustained by a mix of air and oil, which are appropriately metered and proportioned.
  • the fuel is thus drawn from a tank and pressurized by a pump, the function of which is to propel the fuel through a mechanical element, known as nozzle, which nebulizes it inside a stream of air coming for example from a fan.
  • a pump the function of which is to propel the fuel through a mechanical element, known as nozzle, which nebulizes it inside a stream of air coming for example from a fan.
  • the mix is formed inside a combustion chamber and therefore the pump, arranged inside the burner, must be capable of drawing the fuel from the tank, priming itself at startup and creating the necessary degree of suction in order to overcome the difference in level between the pump and the tank as well as the load losses along the piping.
  • the pump must bring the fuel to the intended pressure, which depends on the operating conditions, by way of an internal regulator, and then interrupt the inflow of fuel to the combustion chamber by means of a safety device which is built into the pump and is therefore, for example, an electric valve.
  • pumps having the most disparate constructive geometries are known.
  • the market offers burners which are manufactured so that they can be associated with a pump arranged on the right side or on the left side as well as burners which use pumps which rotate clockwise and pumps which rotate counterclockwise.
  • first pumps which rotate clockwise and have right-side delivery
  • second pumps which rotate clockwise and have left-side delivery
  • third pumps which rotate counterclockwise and have right-side delivery
  • fourth pumps which rotate counterclockwise and have left-side delivery.
  • a single inlet is present in the body of the pump and is connected to a plurality of ducts for conveying the fuel oil, with which user-activatable means interact selectively, such means being suitable to preset the path of the fuel oil toward two separate outlets according to the intended direction of rotation of the gears.
  • the user-activatable means are conveniently constituted by two pairs of screws which interact with respective complementarily threaded cavities being connected to suitable paths for the fuel oil and suitable to be arranged in pairs so as to divert the path of the fuel oil, thus changing the direction of the rotation of the pump.
  • the aim of the present invention is to solve the noted technical problems, and eliminate the drawbacks of the prior art by providing a pump which can be adapted rapidly and simply to any known kind of fuel oil burner.
  • an object of the present invention is to provide a pump which can be used in all known kinds of fuel oil burner and whose direction of rotation can be adjusted rapidly and with no possibility of error.
  • Another object of the invention is to provide a pump which is constructively very simple, reducing the number of components, with a consequent saving in terms of costs related to production, assembly and maintenance.
  • Another object of the present invention is to provide a pump which can be used with the known types of fuel oil burners.
  • Another object is to provide a pump in which the pressure regulator is advantageously arranged above the pump so that it is easily accessible to the user.
  • Another object is to provide a pump which is structurally simple and has low manufacturing costs.
  • a pump particularly for fuel oil burners, comprising a body provided with internal gears and with an external electric valve and a cover which has connectors for a pressure gauge and a vacuum gauge, characterized in that said body has at least two outlets and a single inlet which are connected to a plurality of ducts for conveying said fuel oil with which a user-activatable selection device interacts which is suitable to switch the direction of the circulation of the flow of said fuel oil as a function of the direction of rotation of said gears.
  • the reference numeral 1 designates a pump which is particularly usable for burners using fuel oil such as gas oil and kerosene.
  • the pump is constituted by a body 2 which is partially hollow and internally comprises suitable gears, such as a rotor, designated by the reference numeral 3 and keyed on a motor shaft 4 which protrudes from the rear of the body 2, and a driven ring gear 5.
  • suitable gears such as a rotor, designated by the reference numeral 3 and keyed on a motor shaft 4 which protrudes from the rear of the body 2, and a driven ring gear 5.
  • the ring gear 5 within which the rotor 3 is located in an eccentric position, is arranged inside an auxiliary plate, designated by the reference numeral 6, which is perforated and arranged at right angles to the motor shaft 4.
  • a main plate 7 can be arranged in front of the auxiliary plate 6 and associated with the auxiliary plate 6 and with the body 2 by means of appropriate first threaded screws, which in this embodiment are three in number, are designated by the reference numerals 8a, 8b and 8c, and pass through respective first holes 9a, 9b and 9c, and second holes 10a, 10b and 10c formed respectively in the main plate 7 and in the auxiliary plate 6.
  • the first screws 8a, 8b and 8c can be fastened, for example, within complementarily threaded first dead holes formed on the body 2, only one of which being shown at 11a in Figure 5.
  • a cover 12 which is advantageously box-like and hollow and is suitable to cover the main plate 7 and the auxiliary plate 6, can be conveniently arranged in front of the main plate.
  • the cover 12 is associable with the body 2, for example by means of a plurality of second screws: in the pump shown in the accompanying figures and described herein, the cover 12 is associable by means of four second screws, each designated by the reference numeral 13, which are threaded so as to interact with complementarily threaded second dead holes 14 which are illustrated in Figure 4.
  • a first connector designated by the reference numeral 15, is provided in the cover 12 and a device for measuring the vacuum generated by the rotation of the gear, such as a vacuum gauge, is associable at the connector.
  • a second connector 16 for connecting a pressure measurement device, for example a pressure gauge.
  • the inlet 17 is connected to a first duct 19 for recovering the fuel oil that escapes from the gears of the pump along the motor shaft 4, both of which are connected to a second duct, designated by the reference numeral 20, for connection to the cavity, designated by the reference numeral 21, provided between the cover 12 and the body 2.
  • the fuel oil that flows within the cavity 21 advantageously flows through a filter, designated by the reference numeral 22, which is preferably cylindrical and is arranged between the body 2 and the cover 12, as shown in Figures 5, 9 and 10.
  • the main plate 7 has a pair of first holes, designated by the reference numerals 23a and 23b, for the passage of the fuel oil from the cavity 21 respectively to a third duct 24a and a fourth duct 24b formed on the rear surface of the plate 7.
  • a selection device designated by the reference numeral 25, interacts with the pair of first holes 23a and 23b and with a third hole 26 which is also formed in the plate 7 proximate to the pair of first holes 23a and 23b, so as to connect the third hole 26 selectively with either hole of the pair of first holes 23a and 23b.
  • the selection device 25 allows the passage of the fuel oil from the cavity 21 only within the hole, of the pair of first holes 23a and 23b, that does not interact with the selection device 25: in Figures 5 to 9, the free hole is the first hole 23a, while the first hole 23b is connected to the third hole 26.
  • the selection device 25 can be accessed at a first end 27, which is advantageously cylindrical and conveniently protrudes through the cover 12, so that it can be activated by the user through a rotation of the selection device 25 with respect to an axis which is perpendicular to the cover 12.
  • the selection device 25 has, at the perimetric edge 28 of a second end 29, which lies opposite the first end 27 and is advantageously oval, a sealing gasket 30 which is arranged in contact with the main plate 7.
  • a recess designated by the reference numeral 31, is formed which is suitable to allow the passage of fuel oil from one of the two holes of the pair of first holes 23a and 23b to the third hole 26.
  • the direction of circulation of the flow of fuel oil is varied inside the gears and therefore between the rotor 3 and the ring 5.
  • the fifth duct 32 is connected to a fourth hole, designated by the reference numeral 33, which is formed in the main plate 7, advantageously in a symmetrical position with respect to the third hole 26, at the second connector 16 for measuring the pressure at the delivery.
  • the fifth duct 32 is also connected to a sixth duct 34 which is conveniently controlled by an electric valve 35 for the opening and closing thereof; the sixth duct 34 is suitable to convey the pressurized fuel oil into a seventh duct, designated by the reference numeral 36.
  • the seventh duct 36 advantageously arranged horizontally along the entire width of the body 2, can be accessed from outside by means of two outlets, designated by the reference numerals 37a and 37b, which are advantageously threaded and arranged on the opposite faces of the pump 1, in order to allow to choose which of the two to use to send the fuel oil to the burner according to the arrangement and convenience of installation on the part of the engineer.
  • the outlet of the pair of outlets 37a and 37b that is not used can be easily closed, during installation, for example by using a complementarily threaded screw, designated by the reference numeral 38 in Figure 2.
  • the sixth duct 34 for conveying the fuel oil toward the seventh duct 36, is conveniently connected, between the fifth duct 32 and the electric valve 35, to an eighth duct 38 which is in turn controlled by a pressure regulator of a known type, designated by the reference numeral 39.
  • the pressure regulator 39 which advantageously protrudes upward from the body 2, so that it can be easily accessed from outside, is adjustable to reduce or increase the choke formed along the eighth duct 38, thus facilitating or hindering the return of the excess fuel oil toward the outlet 18.
  • the selection device 25 has, at its surface that faces the internal surface of the cover 12, appropriate means for selective and temporary locking, so as to facilitate the use of the selection device 25.
  • the locking means are advantageously constituted by a ball, designated by the reference numeral 40, which partially protrudes from a respective seat 41 which is formed inside the selection device 25, so that it can optionally slide, in contrast with an underlying spring 42, fully into the seat 41.
  • Two hollows 43a and 43b are formed on the internal surface of the cover 12 so as to allow to temporarily accommodate the ball 40 at the connection between the third hole 26 and, respectively, the first hole 23a or 23b of the pair of first holes.
  • the selection device 25 can be accessed by removing the closure screw of the first connector 15 and by inserting therein a tool, such as a screwdriver, which is suitable to turn the selection device 25.
  • the pump 1 While the pump 1 is running idle, it is possible to measure from the outside the degree of vacuum that can be obtained, simply by connecting to the first connector 15, which is connected to the cavity 21, an appropriate measurement instrument, for example a vacuum gauge.
  • the user can furthermore measure the delivery pressure during operation, advantageously by means of a pressure gauge which is connected to the second connector 16 and is connected, at its other end, to the fourth hole 33 of the main plate 7.
  • the personnel assigned to the installation of the pump 1, or the spare parts dealer, can switch the direction of circulation of the flow of the fuel oil according to the direction of rotation of the gears simply by acting from the outside on the first end of the selection device 25, so as to connect the third hole 26 respectively to the first hole 23b, with a clockwise rotation of the rotor 3, or to the first hole 23a, with a counterclockwise rotation.
  • the pressurized fuel oil is diverted by the recess 31 formed in the second end 29 of the selection device 25 toward the third hole 26 and from there along the fifth duct 32 and the sixth duct 34.
  • part of the fuel oil can be diverted toward the eighth duct 38 and from there toward the outlet 18, by virtue of the passage through the pressure regulator 39.
  • connection for sending the fuel oil to the burner can be performed, as convenient, at one of the pair of outlets 37a and 37b, which are connected to the sixth duct 34 by means of a seventh connecting duct 36.
  • the pump is constructively very simple, since the selection device is constituted by a single component, with consequent low costs for production, assembly and maintenance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Feeding And Controlling Fuel (AREA)
EP01111179A 2000-05-16 2001-05-11 Pompe à engrenages internes Withdrawn EP1156220A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTV20000022 IT251476Y1 (it) 2000-05-16 2000-05-16 Pompa particolarmente per bruciatori di olio combustibile
ITTV000022U 2000-05-16

Publications (2)

Publication Number Publication Date
EP1156220A2 true EP1156220A2 (fr) 2001-11-21
EP1156220A3 EP1156220A3 (fr) 2003-03-05

Family

ID=11459783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01111179A Withdrawn EP1156220A3 (fr) 2000-05-16 2001-05-11 Pompe à engrenages internes

Country Status (2)

Country Link
EP (1) EP1156220A3 (fr)
IT (1) IT251476Y1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018173826A1 (fr) * 2017-03-23 2018-09-27 日本電産トーソク株式会社 Pompe à huile
WO2018173823A1 (fr) * 2017-03-23 2018-09-27 日本電産トーソク株式会社 Dispositif de type pompe à huile
JPWO2018173828A1 (ja) * 2017-03-23 2020-01-23 日本電産トーソク株式会社 オイルポンプ

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781726A (en) * 1952-11-29 1957-02-19 Tuthill Pump Co Reversible fuel pump for oil burners
DE1192054B (de) * 1957-09-21 1965-04-29 Bosch Gmbh Robert Zahnradpumpe
US4247267A (en) * 1978-10-18 1981-01-27 Sid Harvey, Inc. Valve controlled reversible pump
DE3924096C1 (fr) * 1989-07-20 1990-09-13 Danfoss A/S, Nordborg, Dk
CA2078931A1 (fr) * 1992-09-23 1994-03-24 Antonio Sanz Perez Un systeme automatique d'alimentation de bruleurs en diesel ou mazout leger
US6017202A (en) * 1997-12-11 2000-01-25 New Venture Gear, Inc. Bi-directional gerotor-type fluid pump

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018173826A1 (fr) * 2017-03-23 2018-09-27 日本電産トーソク株式会社 Pompe à huile
WO2018173823A1 (fr) * 2017-03-23 2018-09-27 日本電産トーソク株式会社 Dispositif de type pompe à huile
JPWO2018173823A1 (ja) * 2017-03-23 2020-01-23 日本電産トーソク株式会社 オイルポンプ装置
JPWO2018173828A1 (ja) * 2017-03-23 2020-01-23 日本電産トーソク株式会社 オイルポンプ
JPWO2018173826A1 (ja) * 2017-03-23 2020-01-30 日本電産トーソク株式会社 オイルポンプ

Also Published As

Publication number Publication date
ITTV20000022U1 (it) 2001-11-16
EP1156220A3 (fr) 2003-03-05
IT251476Y1 (it) 2003-11-19

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