EP0018265A1 - Machine, such as pump, of which at least some moving parts are in contact with sea-water - Google Patents

Machine, such as pump, of which at least some moving parts are in contact with sea-water Download PDF

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Publication number
EP0018265A1
EP0018265A1 EP80400461A EP80400461A EP0018265A1 EP 0018265 A1 EP0018265 A1 EP 0018265A1 EP 80400461 A EP80400461 A EP 80400461A EP 80400461 A EP80400461 A EP 80400461A EP 0018265 A1 EP0018265 A1 EP 0018265A1
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EP
European Patent Office
Prior art keywords
pump
parts
coating
machine
contact
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Withdrawn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
EP80400461A
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German (de)
French (fr)
Inventor
Jean-François Bonnin
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.)
Bronzavia SA
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Bronzavia SA
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Filing date
Publication date
Application filed by Bronzavia SA filed Critical Bronzavia SA
Publication of EP0018265A1 publication Critical patent/EP0018265A1/en
Withdrawn legal-status Critical Current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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/04—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being hot or corrosive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0466—Nickel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0469—Other heavy metals
    • F05C2201/0475—Copper or alloys thereof
    • F05C2201/0478—Bronze (Cu/Sn alloy)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/12—Coating

Definitions

  • the present invention relates to equipment intended in particular to operate in an underwater environment and of which at least certain moving parts are in contact with sea water. More particularly, but not exclusively, the invention relates to a hydraulic pump, the pumped liquid is sea water. Such pumps are currently used in particular for oil drilling platforms and other petroleum installations of this kind.
  • the object of the present invention is to propose a machine intended for working in an underwater environment and of which at least certain parts in relative movement are in contact with sea water, this machine having a life - significantly longer than that stainless steel machines used so far.
  • a machine such as a pump or the like, of which at least certain parts in relative movement are in contact with sea water
  • the body of the machine is made of a metal chosen from titanium and nickel or the alloys of these metals and in that the contact surfaces of the parts of each pair of parts in relative motion are covered with a coating with a low coefficient of friction, not forming with said metal or alloy no galvanic coupling in the presence of sea water,
  • said coating is made from tungsten carbide applied to moving parts by spraying a plasma of this material.
  • FIG. A pump. high pressure barrel to illustrate a particular application of the invention. However, it is understood that this applies to any other machine or equipment having to work in a marine environment and of which at least certain parts in relative movement are in permanent contact with sea water.
  • the pump shown in FIG. is from classic mechanical design and its very construction is not part of the invention and therefore will not be described in detail here.
  • this pump comprises a body 1 which is tightly secured by a flange 2 with a drive motor (not shown) coupled to a rotary member 3 with an oblique end face acting in turn so conventional, on a swash plate 4.
  • the compartment 5 in which these parts are housed is sealed against sea water and preferably filled with oil, so that the parts themselves can be made of materials usually used for this effect.
  • this cavity 6 comprises a number of cylinders 7 in which as many pistons 8 are movable, driven by the swash plate 4
  • the seal between the cavity 6 and the compartment 5 is ensured at each pair of piston-cylinder by an annular seal 9 arranged in a groove of the piston.
  • all of the parts of the pump are made of a metal chosen from titanium, nickel or alloys of these metals.
  • this metal is used for the entire body 1 of the pump, all the parts housed in the cavity 6 and subjected to sea water being also produced.
  • a metal titanium alloy no TA6V, Inconel 625 or Hastelloy C276 can be used as the metal.
  • each cylinder 7 is delimited by a sheath 10 which is housed in a cylindrical chamber 11 of a mounting block 12 placed in the cavity 6.
  • the sheath 10 and the piston 8 are made of a material of the type defined above. above and therefore have a coefficient of friction with respect to each other such that they cannot, without special measures, move relative to the normal rate of a pump of the kind described.
  • the surfaces in contact with the parts in question namely the wall 13 of the bore of the sheath 10 and the external surface 14 of the piston 8 are covered with respective coatings 15 and 16 which have coefficients of low friction and which do not form with the metal coated parts any galvanic coupling.
  • a preferred coating for the scabbard is a mixture of tungsten carbide and chromium oxide which is preferably applied by vacuum spraying using a plasma gun to obtain at the surface interface 13 and the coating 15, sufficient crystal cohesion. 11 it should be noted that the chromium oxide is mixed with the tungsten carbide to improve the coefficient of friction.
  • the outer coating 6 of the piston 8 is also applied under vacuum using a plasma gun and it preferably consists of tungsten carbide.
  • the thickness of the coatings is chosen from a range from 2 to 3 mm.
  • a high pressure seawater pump produced by the Applicant was able to operate for 300 hours during a test without it being possible to detect traces, no pitting or "cracks" in the contact surfaces. parts in relative motion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The housing (1) of the machine is produced from a metal selected from titanium and nickel or the alloys of these metals, and the contact surfaces (13, 14) of the parts (8, 10) of each pair of parts in relative movement are covered with a coating (15, 16) of low coefficient of friction, forming no galvanic coupling with the said metal or alloy in the presence of seawater. <IMAGE>

Description

La présente invention est relative à des équipements destinés en particulier à fonctionner en milieu sous-marin et dont au moins certaines parties mobiles sont en contact avec l'eau de mer. Plus particulièrement, mais non exclusivement, l'invention concerne une pompe hydraulique dont le liquide pompé est l'eau de mer. De telles pompes sont actuellement utilisées notamment pour les plates-formes de forage pétrolier et autres installations pétrolières de ce genre.The present invention relates to equipment intended in particular to operate in an underwater environment and of which at least certain moving parts are in contact with sea water. More particularly, but not exclusively, the invention relates to a hydraulic pump, the pumped liquid is sea water. Such pumps are currently used in particular for oil drilling platforms and other petroleum installations of this kind.

Pour pouvoir résister à l'effet extrêmement corrosif de l'eau de mer, de telles machines sont fabriquées en acier inoxydable, du type 316 L par exemple, mais même en prenant cette mesure, la machine n'est plus utilisable après une ou deux années d'utilisation en milieu sous-marin, car l'eau de mer attaque l'acier inoxydable de manière à y former des fissures. En outre, l'acier perd la plupart de ses caractéristiques mécaniques.To be able to resist the extremely corrosive effect of sea water, such machines are made of stainless steel, of the 316 L type for example, but even when taking this measure, the machine is no longer usable after one or two years of use in underwater environments, because seawater attacks stainless steel so as to form cracks. In addition, steel loses most of its mechanical characteristics.

On a déjà pensé à remplacer l'acier inoxydable par des matériaux dont on sait qu'ils résistent mieux à la corrosion de l'eau de mer, mais on se heurte alors à une difficulté supplémentaire. En effet, ces matériaux présentent en général un coefficient de frottement élevé de sorte que les pièces destinées à éxécuter des mouvements relatifs ne peuvent être faites en ces matériaux. Il serait alors possible de réaliser l'une des pièces d'un ensemble donné en un matériau classique à coefficient de frottement faible, tels que le bronze, l'acier inoxydable ou l'aluminium, mais on rencontre alors des effets de couplage galvanique ou de très forts potentiels électro-chimiques, effets qui sont renforcés considérablement par l'eau de mer.We have already thought of replacing stainless steel with materials which we know are more resistant to corrosion of seawater, but we come up against an additional difficulty. Indeed, these materials generally have a high coefficient of friction so that the parts intended to execute relative movements cannot be made of these materials. It would then be possible to make one of the parts of a given assembly from a conventional material with a low coefficient of friction, such as bronze, stainless steel or aluminum, but we then encounter galvanic coupling effects or very high electro-chemical potentials, effects which are considerably reinforced by sea water.

La présente invention a pour but de proposer une machine destinée à travailler en milieu sous-marin et dont au moins certaines pièces en mouvement relatif sont en contact avec l'eau de mer, cette machine ayant une durée - de vie nettement plus grande que celle des machines en acier inoxydable utilisées jusqu'à présent.The object of the present invention is to propose a machine intended for working in an underwater environment and of which at least certain parts in relative movement are in contact with sea water, this machine having a life - significantly longer than that stainless steel machines used so far.

Elle à donc pour objet une machine, telle qu'une pompe ou autre, dont au moins certaines pièces en mouvement relatif sont en contact avec de l'eau de mer, caractérisée en ce que le corps de la.machine est réalisé en un métal choisi parmi le titane et le nickel ou les alliages de ces métaux et en ce que les surfaces de contact des pièces de chaque couple de pièces en mouvement relatif sont recouvertes d'un revêtement à faible coefficient de frottement, ne formant avec ledit métal ou alliage aucun couplage galvanique en présence de l'eau de mer,It therefore relates to a machine, such as a pump or the like, of which at least certain parts in relative movement are in contact with sea water, characterized in that the body of the machine is made of a metal chosen from titanium and nickel or the alloys of these metals and in that the contact surfaces of the parts of each pair of parts in relative motion are covered with a coating with a low coefficient of friction, not forming with said metal or alloy no galvanic coupling in the presence of sea water,

De préférence, ledit revêtement est réalisé à base de carbure de tungstène appliqué sur les pièces en mouvement par projection d'un plasma de ce matériau.'Preferably, said coating is made from tungsten carbide applied to moving parts by spraying a plasma of this material.

D'autres caractéristiques de l'invention ap- paraitront au cours de la description qui va suivre, donnée unique à titre d'exemple et faite en référence au dessin annexé sur lequel :

  • - la Fig. Unique montre une vue en coupe axiale d'une pompe à haute pression à eau de mer.
Other characteristics of the invention will appear during the description which follows, given by way of example only and with reference to the appended drawing in which:
  • - Fig. Unique shows an axial section view of a high pressure seawater pump.

On a représenté sur la Fig., une pompe à . barillet à haute pression pour illustrer une application particulière de l'invention. Cependant, il est entendu que celle-ci s'applique à toute autre machine ou équipement devant travailler en milieu marin et dont au moins certaines pièces en mouvement relatif sont en contact permanent avec l'eau de mer.There is shown in Fig., A pump. high pressure barrel to illustrate a particular application of the invention. However, it is understood that this applies to any other machine or equipment having to work in a marine environment and of which at least certain parts in relative movement are in permanent contact with sea water.

La pompe représentée sur la Fig. est d'une conception mécanique classique et sa construction même ne fait pas partie de l'invention et elle ne sera donc pas décrite en détail ici.The pump shown in FIG. is from classic mechanical design and its very construction is not part of the invention and therefore will not be described in detail here.

Il suffit de noter que cette pompe comporte un corps 1 qui est solidaire de façon étanche par un flasque 2 avec un moteur d'entraînement (non représenté) accouplé à un organe rotatif 3 à face d'extrémité oblique agissant à son tour, de façon classique, sur un plateau oscillant 4. Le compartiment 5 dans lequel ces pièces sont logées est étanche à l'eau de mer et rempli d'huile de préférence, de sorte que les pièces elles-mêmes peuvent être réalisées en des matériaux habituellement utilisés à cet effet.It suffices to note that this pump comprises a body 1 which is tightly secured by a flange 2 with a drive motor (not shown) coupled to a rotary member 3 with an oblique end face acting in turn so conventional, on a swash plate 4. The compartment 5 in which these parts are housed is sealed against sea water and preferably filled with oil, so that the parts themselves can be made of materials usually used for this effect.

Par contre, la cavité restante 6 du corps de la pompe est soumise à l'eau de mer. De façon classique également, cette cavité 6 comporte un certain nombre de cylindres 7 dans lesquels sont déplaçables autant de pistons 8 entraînés par le plateau oscillant 4. L'étanchéité entre la cavité 6 et le compartiment 5 est assurée au niveau de chaque paire de cylindre-piston par une garniture d'étanchéité annulaire 9 disposée dans une gorge du piston.On the other hand, the remaining cavity 6 of the pump body is subjected to seawater. Also conventionally, this cavity 6 comprises a number of cylinders 7 in which as many pistons 8 are movable, driven by the swash plate 4 The seal between the cavity 6 and the compartment 5 is ensured at each pair of piston-cylinder by an annular seal 9 arranged in a groove of the piston.

Suivant l'invention, l'ensemble des pièces de la pompe, c'est-à-dire toutes ses parties qui sont normalement en contact avec l'eau de mer sont réalisées en un métal choisi parmi le titane, le nickel ou les alliages de ces métaux. Dans le cas représenté, où la pompe est destinée à travailler en étant totalement immergée, ce métal est utilisé pour la totalité du corps 1 de la pompe, toutes les pièces logées dans la cavité 6 et soumises à l'eau de mer étant également réalisées en ce même métal. A titre d'exemple, on peut utiliser comme métal un alliage de titane n° TA6V, l'Inconel 625 ou le Hastelloy C276.According to the invention, all of the parts of the pump, that is to say all of its parts which are normally in contact with seawater, are made of a metal chosen from titanium, nickel or alloys of these metals. In the case shown, where the pump is intended to work while being completely submerged, this metal is used for the entire body 1 of the pump, all the parts housed in the cavity 6 and subjected to sea water being also produced. in the same metal. For example, a metal titanium alloy no TA6V, Inconel 625 or Hastelloy C276 can be used as the metal.

En particulier, chaque cylindre 7 est délimité par un fourreau 10 qui est logé dans une chambre cylindrique 11 d'un bloc de montage 12 placé dans la cavité 6. Le fourreau 10 et le piston 8 sont réalisés en un matériau du type défini ci-dessus et présentent donc un coefficient de frottement l'un par rapport à l'autre tel qu'ils ne peuvent, sans mesures particulières se déplacer relativement à la cadence normale d'une pompe du genre décrit.In particular, each cylinder 7 is delimited by a sheath 10 which is housed in a cylindrical chamber 11 of a mounting block 12 placed in the cavity 6. The sheath 10 and the piston 8 are made of a material of the type defined above. above and therefore have a coefficient of friction with respect to each other such that they cannot, without special measures, move relative to the normal rate of a pump of the kind described.

Suivant une caractéristique essentielle de l'invention, les surfaces en contact des pièces en question à savoir, la paroi 13 de l'alésage du fourreau 10 et la surface extérieure 14 du piston 8 sont recouvertes de revêtements respectifs 15 et 16 qui ont des coefficients de frottement faibles et qui ne forment avec le métal des pièces revêtues aucun couplage galvanique. Un revêtement 15 préféré pour le fourreau est un mélange de carbure de tungstène et d'oxyde de chrome que l'on applique de préférence par projection sous vide à l'aide d'un pistolet à plasma pour obtenir à l'interface de la surface 13 et du revêtement 15, une cohésion cristalline suffisante..11 est à noter que l'oxyde de chrome est mélangé au carbure de tungstène pour améliorer le coefficient de frottement.According to an essential characteristic of the invention, the surfaces in contact with the parts in question, namely the wall 13 of the bore of the sheath 10 and the external surface 14 of the piston 8 are covered with respective coatings 15 and 16 which have coefficients of low friction and which do not form with the metal coated parts any galvanic coupling. A preferred coating for the scabbard is a mixture of tungsten carbide and chromium oxide which is preferably applied by vacuum spraying using a plasma gun to obtain at the surface interface 13 and the coating 15, sufficient crystal cohesion. 11 it should be noted that the chromium oxide is mixed with the tungsten carbide to improve the coefficient of friction.

Le revêtement extérieur 6 du piston 8 est également appliqué sous vide à l'aide d'un pistolet à plasma et il est constitué de préférence de carbure de tungstène.The outer coating 6 of the piston 8 is also applied under vacuum using a plasma gun and it preferably consists of tungsten carbide.

L'épaisseur des revêtements est choisie dans une gamme allant de 2 à 3 mm.The thickness of the coatings is chosen from a range from 2 to 3 mm.

Une pompe à eau de mer à haute pression réalisée par la Demanderesse a pu fonctionner pendant 300 H au cours d'un essai sans que l'on ait pu déceler des traces, ni de piqûres, ni de "criques" dans les surfaces de contact des pièces en mouvement relatif.A high pressure seawater pump produced by the Applicant was able to operate for 300 hours during a test without it being possible to detect traces, no pitting or "cracks" in the contact surfaces. parts in relative motion.

Claims (6)

1. Machine, telle qu'une pompe ou autre, dont au moins certaines pièces en mouvement relatif sont en contact avec l'eau de mer, caractérisée en ce que le corps (1) de la machine est réalisé en un métal choisi parmi le titane et le nickel ou les alliages de ces métaux et en ce que les surfaces de contact (13,14) des pièces (8,10) de chaque couple de pièces en mouvement relatif sont recouvertes d'un revêtement (15,16) à faible coefficient de frottement ne formant avec ledit métal ou alliage aucun couplage galvanique en présence de l'eau de mer,1. Machine, such as a pump or the like, of which at least certain parts in relative movement are in contact with sea water, characterized in that the body (1) of the machine is made of a metal chosen from titanium and nickel or the alloys of these metals and in that the contact surfaces (13,14) of the parts (8,10) of each pair of parts in relative movement are covered with a coating (15,16) to low coefficient of friction forming no galvanic coupling with said metal or alloy in the presence of sea water, 2. Machine suivant la revendication 1, caractérisée en ce que ledit revêtement est en.carbure de tungstène.2. Machine according to claim 1, characterized in that said coating is en.carbure de tungstène. 3. Machine suivant la revendication 2, dans laquelle la surface d'au moins une des pièces est la paroi intérieure d'un alésage, caractérisée en ce que le revêtement est constitué par un mélange de carbure de tungstène et d'oxyde de chrome,3. Machine according to claim 2, in which the surface of at least one of the parts is the internal wall of a bore, characterized in that the coating consists of a mixture of tungsten carbide and chromium oxide, 4. Machine suivant l'une quelconque des revendications 1 à 3, caractérisée en ce que ledit revêtement est obtenu par projection d'un plasma.4. Machine according to any one of claims 1 to 3, characterized in that said coating is obtained by spraying a plasma. 5. Machine suivant l'une quelconque des revendications 1 à 5, caractérisée en ce qu'elle constitue une pompe du type à barillet.5. Machine according to any one of claims 1 to 5, characterized in that it constitutes a pump of the barrel type. 6. Machine suivant la revendication 5, caractérisée en ce que le corps (1) de la pompe est divisé en une cavité de pompage (6) soumise à l'eau de mer, dans laquelle sont logés les cylindres (7) et les pistons (8) et un compartiment d'entraînement (5) dans lequel sont disposés le plateau oscillant (4) et l'organe d'entraînement (3) de la pompe, la cavité (6) et le compartiment (5) étant étanche l'un par rapport à l'autre par l'intermédiai- .re de joints (9) logés dans des gorges des pistons (8) et en contact avec le revêtement (15) déposé sur la surface intérieure (13) du cylindre.6. Machine according to claim 5, characterized in that the body (1) of the pump is divided into a pumping cavity (6) subjected to seawater, in which are housed the cylinders (7) and the pistons (8) and a drive compartment (5) in which are arranged the swash plate (4) and the drive member (3) of the pump, the cavity (6) and the compartment (5) being sealed. relative to each other by means of seals (9) housed in grooves of the pistons (8) and in contact with the coating (15) deposited on the inner surface (13) of the cylinder.
EP80400461A 1979-04-19 1980-04-08 Machine, such as pump, of which at least some moving parts are in contact with sea-water Withdrawn EP0018265A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7909019 1979-04-19
FR7909919A FR2454543A1 (en) 1979-04-19 1979-04-19 MACHINE, SUCH AS A PUMP, OF WHICH AT LEAST CERTAIN MOBILE PARTS ARE IN CONTACT WITH SEA WATER

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EP0018265A1 true EP0018265A1 (en) 1980-10-29

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EP80400461A Withdrawn EP0018265A1 (en) 1979-04-19 1980-04-08 Machine, such as pump, of which at least some moving parts are in contact with sea-water

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FR2635830A1 (en) * 1988-08-23 1990-03-02 Commissariat Energie Atomique Volumetric (positive displacement) machine of the pump or compressor type which does not have lubrication
US5645896A (en) * 1995-05-30 1997-07-08 Kudu Industries Inc. Method of applying a filled in metal carbide hard facing to the rotor of a progressing cavity pump
EP0844389A1 (en) * 1996-11-25 1998-05-27 Sanden Corporation Piston mechanism of fluid displacement apparatus
EP1063428A3 (en) * 1999-06-21 2001-10-31 Hitachi, Ltd. High pressure fuel pump
WO2017177936A1 (en) * 2016-04-13 2017-10-19 武汉钜威天数字化机械制造有限公司 Axial plunger pump

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FR3086703B1 (en) * 2018-09-27 2020-11-06 Agence Nat Pour La Gestion Des Dechets Radioactifs WATER HYDRAULIC MOTOR

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CH361478A (en) * 1957-10-17 1962-04-15 Dow Chemical Co Pump part made up of piston and piston drive part
US3209701A (en) * 1962-10-05 1965-10-05 Sundstrand Corp Pump
US3212448A (en) * 1963-04-22 1965-10-19 Clevite Corp Fluid apparatus
FR1449397A (en) * 1965-10-07 1966-08-12 Berkenhoff & Co Method of manufacturing wire mesh with improved wear resistance
US3507584A (en) * 1968-03-27 1970-04-21 Us Navy Axial piston pump for nonlubricating fluids

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2635830A1 (en) * 1988-08-23 1990-03-02 Commissariat Energie Atomique Volumetric (positive displacement) machine of the pump or compressor type which does not have lubrication
US5645896A (en) * 1995-05-30 1997-07-08 Kudu Industries Inc. Method of applying a filled in metal carbide hard facing to the rotor of a progressing cavity pump
EP0844389A1 (en) * 1996-11-25 1998-05-27 Sanden Corporation Piston mechanism of fluid displacement apparatus
US5934170A (en) * 1996-11-25 1999-08-10 Sanden Corporation Piston mechanism of fluid displacement apparatus
EP1063428A3 (en) * 1999-06-21 2001-10-31 Hitachi, Ltd. High pressure fuel pump
US6471491B1 (en) 1999-06-21 2002-10-29 Hitachi, Ltd. High pressure fuel pump
US6488478B2 (en) 1999-06-21 2002-12-03 Hitachi, Ltd. High pressure fuel pump
WO2017177936A1 (en) * 2016-04-13 2017-10-19 武汉钜威天数字化机械制造有限公司 Axial plunger pump

Also Published As

Publication number Publication date
FR2454543A1 (en) 1980-11-14
FR2454543B1 (en) 1982-05-21

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