EP0070555B1 - Installation pour ravitailler des véhicules, particulièrement en carburants cryogéniques liquides - Google Patents

Installation pour ravitailler des véhicules, particulièrement en carburants cryogéniques liquides Download PDF

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Publication number
EP0070555B1
EP0070555B1 EP82106519A EP82106519A EP0070555B1 EP 0070555 B1 EP0070555 B1 EP 0070555B1 EP 82106519 A EP82106519 A EP 82106519A EP 82106519 A EP82106519 A EP 82106519A EP 0070555 B1 EP0070555 B1 EP 0070555B1
Authority
EP
European Patent Office
Prior art keywords
pump
housing
assembly
pressure
unit
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
EP82106519A
Other languages
German (de)
English (en)
Other versions
EP0070555A2 (fr
EP0070555A3 (en
Inventor
Bruno Dipl.-Ing. Auchter
Peter Haidinger
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.)
Rheinhuette Vorm Ludwig Beck & Co
Siemens AG
RHEINHUTTE VORM LUDWIG BECK AND Co
Original Assignee
Rheinhuette Vorm Ludwig Beck & Co
Siemens AG
RHEINHUTTE VORM LUDWIG BECK AND Co
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 Rheinhuette Vorm Ludwig Beck & Co, Siemens AG, RHEINHUTTE VORM LUDWIG BECK AND Co filed Critical Rheinhuette Vorm Ludwig Beck & Co
Priority to AT82106519T priority Critical patent/ATE23028T1/de
Publication of EP0070555A2 publication Critical patent/EP0070555A2/fr
Publication of EP0070555A3 publication Critical patent/EP0070555A3/de
Application granted granted Critical
Publication of EP0070555B1 publication Critical patent/EP0070555B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/58—Arrangements of pumps
    • B67D7/68—Arrangements of pumps submerged in storage tank or reservoir
    • 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
    • F04C11/008—Enclosed motor pump units

Definitions

  • the invention relates to a system for refueling motor vehicles with liquid, in particular cryogenic, fuels, by means of a submersible pump unit consisting of a pump and an electric motor, which is arranged in a tubular housing that extends down to the bottom of a storage container and is connected to the cover flange that closes the housing. with a valve connecting the reservoir to the lower end of the tubular housing.
  • a submersible pump unit consisting of a pump and an electric motor
  • submersible pump units To pump fuels such as gasoline, diesel oil or liquid gas, it is known to install submersible pump units in a container at the lowest point in such a way that it can be pumped practically completely empty.
  • the submersible pump units are preferably equipped with centrifugal pumps with which large amounts of liquid can be pumped.
  • the submersible pump unit is additionally inserted into a tubular housing, which also serves as a pressure line, which extends down to the bottom of the storage container and at the foot end of which from the outside via a linkage or directly through the unit when installing or removing it actuatable valve is arranged.
  • a tubular housing which also serves as a pressure line, which extends down to the bottom of the storage container and at the foot end of which from the outside via a linkage or directly through the unit when installing or removing it actuatable valve is arranged.
  • a conically tapered shoulder on which the submersible pump unit is supported with an appropriately designed attachment.
  • the sealing seat formed in this way divides the housing into a suction chamber below and a pressure chamber above the unit.
  • an inert gas or another " oxygen-free gas, which pushes the fuel back into the storage container, is introduced into the housing above the liquid level, and after emptying the Because of the sealing seat, the fuel can only flow back through the unit. Emptying the housing is therefore a time-consuming process.
  • a lifting device is required to install and remove the unit that is connected to the cover flange by a cable (DE-C -16 53 684 and DE-C-27 07 042).
  • DE-B-30 22 089 describes a system for decanting liquids with a low boiling point from one container into another container, preferably into the tank of a motor vehicle.
  • a centrifugal pump for the submersible pump unit a multi-stage side channel pump is used, which is divided on both ends of the motor shaft.
  • the pressure chamber in the tubular housing above the unit is connected to the suction chamber below the unit via a compensating line that can be shut off by a valve.
  • This compensating line that bypasses the sealing seat more or less reduces the time required for emptying and filling the tubular housing, depending on the cross section of the compensating line.
  • the unit is connected to the cover flange by means of a chain. In particular, the installation of the unit in the housing is therefore difficult because the unit must be guided centrally to produce the sealing seat. In addition, the chain must be dimensioned so long that the electrical line connecting the unit to the cover flange is not subjected to tension.
  • centrifugal pumps are particularly suitable for pumping large quantities.
  • the delivery pressure decreases with increasing delivery volume. It can therefore not be ruled out even when using a multi-stage side channel pump that the delivery pressure is not sufficient to fill the tank of a motor vehicle if, for. B. there is excessive pressure in the tank as a result of a high ambient temperature.
  • the invention has for its object to equip the submersible pump unit with a pump, the performance of which, even under unfavorable conditions, is sufficient to deliver the fuel into the tank of a motor vehicle, and to make the installation and removal of the unit as simple as possible.
  • this object is achieved in that the pump of the submersible pump unit forming the lower ring channel connecting the upper end of the housing with the tubular housing is a positive displacement pump and in that the connection between the cover flange and the unit consists of a penetrating and with the cover flange this welded pressure pipe connected to the pressure side of the unit.
  • a positive displacement pump is characterized by a very steep characteristic. This means that a small throttling of the delivery rate results in a high pressure increase.
  • the use of a positive displacement pump thus ensures that a motor vehicle tank can be filled within a short time even against increased internal pressure. Since the cross section of the ring channel formed between the unit and the housing is relatively large and only the small amount of fuel present in the pressure line and in the unit itself has to be discharged through the unit, the emptying time practically depends only on the passage cross section of the foot valve. Due to the welded connection between the cover flange and the pressure pipe connected to the unit, the unit can be easily removed from the housing or built into the housing, since neither precise center guidance of the unit nor avoidance of the electrical Supply line acting tensile forces must be observed.
  • a lock-like, tubular housing 4 is inserted through the dome 2 of a storage container 1, which is filled with fuel, for example, up to the dash-dotted double line 3, which extends down to the bottom 5 of the storage container and is fastened to the container dome by means of a flange connection 6, 7 which tightly closes the storage container.
  • the free end of the housing carries a flange shoulder 8 and is closed by a cover flange 9.
  • An opening 10 in the cover flange is covered with a plate 11, in which pressure-resistant bushings 12 are used for connecting electrical conductors 13.
  • the conductors 13 are introduced via a cable entry 14 into a terminal box 15 closing the opening 10.
  • a pressure pipe 16 with a connecting flange 16a is guided through the cover flange 9 and welded to it.
  • the pressure pipe on the pressure side of a submersible pump assembly 17, which consists of an electric motor, for example a three-phase motor, and a pump, is connected by means of a screw connection 18 and equipped with an overflow valve 19.
  • An electrical feed line 20 connecting the feedthroughs 12 to the unit is fixed to the pressure pipe with clamps 21.
  • a valve 22 At the foot end of the housing 4 there is a valve 22 which can be actuated by a linkage 23 and connects the interior of the housing to the storage container 1.
  • the submersible pump unit forms with the housing an annular channel 24 of relatively large cross-section, so that the fuel contained in the housing in the event of a malfunction in the submersible pump unit when the valve 22 is open by means of a gas introduced into the housing, for. B. nitrogen or inert gas, can be quickly pushed back into the container.
  • a gas introduced into the housing for. B. nitrogen or inert gas
  • the comparatively small amount of fuel flowing out of the pressure pipe at the same time does not lead to an increase in the emptying time.
  • the time required for emptying and also for filling the housing therefore depends only on the flow cross section of the foot valve 22.
  • a pressure connection 25 with a shut-off valve 26 is introduced into the cover flange 9.
  • the gas can be discharged from the housing by means of a further pressure connection 27 with a shut-off valve 28 inserted into the housing.
  • the housing and the storage container are connected to one another via a pressure compensation line 29 which can be shut off by means of a valve 29a and which is passed through the flange 7.
  • the drive 30 for the foot valve 22 is also arranged, which is accessible after removing a cap 31.
  • the submersible pump unit 17 shown in section in FIG. 3 consists of an electric motor 32, for example a three-phase motor, and a pump which is arranged directly on the stub shaft 33 of the motor and is designed as a positive displacement pump 34.
  • the shaft 35 of the motor is mounted in two ball bearings 36, 37 in a special design in the housing 38 of the unit, which guarantees the long service life of the bearings even in non-lubricious liquids.
  • the ball bearing cage consists of a Teflon composite sintered mass, which provides a lubricating film while the balls run.
  • the ball bearings are axially preloaded by a corrugated washer 39.
  • the housing 38 of the submersible pump unit is equipped with channels 40 in the area of the engine. Through these channels and through the air gap 41 between the rotor 42 and the stator 43 of the motor, the liquid conveyed by the pump flows into the pressure pipe 16, which is screwed into a threaded bore 45 arranged in the housing cover 44. Part of the liquid flows through the ball bearings and prevents the lubricating film from being destroyed, which could result from an increase in temperature.
  • the lower end of the unit housing 38 is closed off by a base plate 47 provided on the outside with an annular recess 46.
  • the annular depression which is connected via a suction opening 48 to a lower, trough-shaped suction space 49 on the inside of the base plate, is covered by a filter 50 consisting of a sintered material.
  • a lower, trough-shaped pressure chamber 51 is also arranged on the inside of the base plate.
  • the suction chamber and the pressure chamber are closed off with a control disk 52 with control slots 53 on the suction side and control slots 54 on the pressure side.
  • Above the displacement pump 34 there is a further control disk 55 with control slots 56 and 57, which establish a connection to an upper suction chamber 58 and an upper pressure chamber 59, respectively.
  • the positive displacement pump is arranged, the inner rotor 60 of which is fixed in a sliding fit on the free end 33 of the motor shaft 35 during the External rotor 61 is mounted in a sleeve 62, for example made of Teflon bronze.
  • the sleeve 62 is inserted into an outer housing 63, which is equipped with an inlet slot 64 connecting the upper and lower suction chambers 49, 58 and an outlet slot 65 connecting the two pressure chambers 51, 57.
  • the inner rotor carries 60 an external toothing and the external rotor 61 an internal toothing. The number of teeth of the inner rotor is one less than that of the outer rotor.
  • the teeth are dimensioned and shaped so that all teeth of the inner rotor touch the outer rotor at any time and in any rotational position.
  • displacement chambers 66 are formed during a rotary movement, which are connected to the suction spaces or pressure spaces via the control slots 53 or 54 (partially shown in broken lines in FIG. 4).
  • the change in the size of the displacement chambers resulting from a rotary movement represents a change in volume which is essentially sinusoidal. Since the outer rotor is driven by the inner rotor, the relative speed between the two rotors is low and, as a result, the service life is long.
  • the flow rate of the displacement pump is proportional to the speed.
  • the positive displacement pump is acted upon from both sides with the liquid to be conveyed and the conveying liquid is discharged to both sides. This ensures smooth running, optimal filling and pressure equalization in the positive displacement pump.
  • the liquid delivered by the pump flows through a passage 67 from the upper pressure chamber 59 into the interior of the engine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)

Claims (3)

1. Installation de ravitaillement de véhicules automobiles en carburants liquides, notamment cryogéniques, au moyen d'un groupe de pompage immergé (17) qui est constitué d'une pompe (34) et d'un moteur électrique (32), qui est disposé dans une enveloppe (4) tubulaire, allant jusqu'au fond (3) d'un réservoir (1) et qui est reliée au couvercle (9) fermant l'enveloppe, une vanne (22) permettant la communication vers le réservoir étant prévue à l'extrémité inférieure de l'enveloppe, caractérisée en ce que la pompe (34) du groupe de pompage immergé (17) formant, avec l'enveloppe (4) tubulaire, un canal annulaire (24) mettant l'extrémité inférieure de l'enveloppe en communication avec l'extrémité supérieure de celle-ci, est une pompe volumétrique et en ce que la liaison entre le couvercle (9) et le groupe est constituée d'un tuyau de refoulement (16) raccordé au côté refoulement du groupe, traversant le couvercle et soudé à celui-ci.
2. Installation suivant la revendication 1, caractérisée en ce que la pompe volumétrique (34) est constituée d'un rotor intérieur (60), à denture extérieure, entraîné par l'arbre du moteur électrique (32) et d'un rotor extérieur (61), à denture intérieure, excentré par rapport au rotor intérieur et dont la denture contient une dent de plus que celle du rotor intérieur, et d'un corps extérieur (63) de réception des deux rotors.
3. Installation suivant la revendication 2, caractérisée en ce que des chambres d'aspiration (49 et 58) disposées en-dessous et au-dessus de la pompe communiquent entre elles par une fente d'admission (64), tandis que des chambres d'aspiration (51 et 69) disposées en-dessous et au-dessus de la pompe communiquent entre elles par une fente de sortie (65) ménagée dans le corps extérieur (63).
EP82106519A 1981-07-22 1982-07-19 Installation pour ravitailler des véhicules, particulièrement en carburants cryogéniques liquides Expired EP0070555B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106519T ATE23028T1 (de) 1981-07-22 1982-07-19 Anlage zum betanken von kraftfahrzeugen mit fluessigen, insbesondere kryogenen treibstoffen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3128995 1981-07-22
DE19813128995 DE3128995A1 (de) 1981-07-22 1981-07-22 Anlage zum betanken von kraftfahrzeugen mit fluessigen, insbesondere kryogenen treibstoffen

Publications (3)

Publication Number Publication Date
EP0070555A2 EP0070555A2 (fr) 1983-01-26
EP0070555A3 EP0070555A3 (en) 1984-07-18
EP0070555B1 true EP0070555B1 (fr) 1986-10-22

Family

ID=6137508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106519A Expired EP0070555B1 (fr) 1981-07-22 1982-07-19 Installation pour ravitailler des véhicules, particulièrement en carburants cryogéniques liquides

Country Status (3)

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EP (1) EP0070555B1 (fr)
AT (1) ATE23028T1 (fr)
DE (2) DE3128995A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320596A1 (de) * 1983-06-08 1984-01-05 Neudecker & Jolitz GmbH & Co KG, 4423 Gescher Motorpumpenkompakteinheit bestehend aus elektromotor und aussenverzahnter zahnradpumpe kompl. in einem gehaeuse
DE3502999A1 (de) * 1985-01-30 1986-07-31 LGA Gastechnik GmbH, 5480 Remagen Vorrichtung zur restentleerung eines fluessigkeitstanks
DE3619940A1 (de) * 1986-06-13 1987-12-23 Milchquelle Zapftechnik Vertri Zapfvorrichtung fuer milch und dgl.
DE4139844A1 (de) * 1991-02-03 1993-06-24 Fritz Curtius Verfahren zum entfernen des kondensates eines benzindampf/luftgemisches, welches in einer gasrueckfuehrleitung anfaellt
DE19758947B4 (de) * 1997-08-29 2010-04-08 Gardena Manufacturing Gmbh Transportabler Wasserhahn
JP6823432B2 (ja) 2016-11-18 2021-02-03 川崎重工業株式会社 低温液化ガスポンプ用断熱容器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1051301B (de) * 1955-12-31 1959-02-26 Distillers Co Yeast Ltd Pumpe fuer das Umpumpen von leicht verdampfbaren Fluessigkeiten
US2932310A (en) * 1957-09-16 1960-04-12 Allied Chem Apparatus for liquefied gas transfer
US3824047A (en) * 1973-03-23 1974-07-16 Dermott H Mc Floating rotary ring member of fluid displacement device
DE3022089C2 (de) * 1980-06-12 1986-07-31 Rheinhuette Vorm. Ludwig Beck & Co, 6200 Wiesbaden Anlage zum Umfüllen von Flüssigkeiten mit niedrigem Siedepunkt, insbesondere von kryogenen Flüssigkeiten, aus einem Behälter in einen anderen

Also Published As

Publication number Publication date
DE3128995A1 (de) 1983-02-10
DE3273887D1 (en) 1986-11-27
ATE23028T1 (de) 1986-11-15
EP0070555A2 (fr) 1983-01-26
EP0070555A3 (en) 1984-07-18

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