EP0180510A1 - Hydraulische Kolbenpumpe mit zwangsläufig angetriebenen Einlassventilen - Google Patents

Hydraulische Kolbenpumpe mit zwangsläufig angetriebenen Einlassventilen Download PDF

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Publication number
EP0180510A1
EP0180510A1 EP85402018A EP85402018A EP0180510A1 EP 0180510 A1 EP0180510 A1 EP 0180510A1 EP 85402018 A EP85402018 A EP 85402018A EP 85402018 A EP85402018 A EP 85402018A EP 0180510 A1 EP0180510 A1 EP 0180510A1
Authority
EP
European Patent Office
Prior art keywords
cam
valve
piston
spring
suction
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.)
Granted
Application number
EP85402018A
Other languages
English (en)
French (fr)
Other versions
EP0180510B1 (de
Inventor
Louis Claude Porel
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.)
Hydro Rene Leduc SA
Original Assignee
Hydro Rene Leduc SA
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 Hydro Rene Leduc SA filed Critical Hydro Rene Leduc SA
Publication of EP0180510A1 publication Critical patent/EP0180510A1/de
Application granted granted Critical
Publication of EP0180510B1 publication Critical patent/EP0180510B1/de
Expired 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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0042—Piston machines or pumps characterised by having positively-driven valving with specific kinematics of the distribution member
    • F04B7/0053—Piston machines or pumps characterised by having positively-driven valving with specific kinematics of the distribution member for reciprocating distribution members
    • 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
    • F04B1/14—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 having stationary cylinders
    • F04B1/18—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 having stationary cylinders having self-acting distribution members, i.e. actuated by working fluid
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • F04B53/1022—Disc valves having means for guiding the closure member axially

Definitions

  • the present invention relates to improvements in hydraulic piston pumps and controlled suction valves.
  • Hydraulic piston pumps generally comprise a plurality of reciprocating pistons by means of a cam; this cam can be connected to the drive shaft, the pistons sliding in cylinders hollowed out in the pump body, or the cam is fixed and the pistons slide in cylinders hollowed out in a rotating barrel driven by the shaft d 'training.
  • the cam can be of any suitable shape, for example an eccentric, the pistons being radial or a bias plate, the pistons then being parallel to the drive shaft of the pump.
  • the first drawback stems from the fact that the direction of rotation of the pump drive shaft must always be the same, without which suction and delivery can no longer take place.
  • French patent n . 77.18715 of 06/17/1977 to place the front face of the bias plate, without the lunula, a plate that can pivot 180 ', this plate being it, provided with a lunula: it is then possible by a simple rotation of the plate on the front face of the bias plate to reverse the suction and discharge phases and therefore d '' reverse the direction of rotation of the pump.
  • this rotation of the plate on the face of the bias plate cannot be done automatically and requires manual intervention each time.
  • the second drawback stems from the fact that hydraulic liquids having a non-negligible compressibility at these high pressures (200 bars and beyond), it is necessary to angularly offset the start of the lunula relative to the line of greatest slope of the face of the bias plate so as to prevent the admissions phase from starting before the liquid inside the piston has finished relaxing. If such a precaution is not taken, the pressurized liquid flows back into the suction circuit, which lowers the efficiency of the pump.
  • the magnitude of this offset is a function of the speed of rotation of the pump and the compressibility rate of the fluid conveyed. The latter depends on the pressure, the temperature, the quantity of air dissolved in the fluid etc ...
  • the Applicant has replaced the supply system by means of a lunula and sliding pads with suction valves.
  • a bias plate pump comprising for each piston an intake valve subjected to the action of two opposing springs: a first spring pushing it towards closing and a second spring pushing it towards the opening, this second spring being associated with a cam linked in rotation to the drive shaft of the pump so that the force exerted by this second spring becomes substantially equal to that exerted in the opposite direction by the first at the start of the suction phase.
  • the cam is constructed so that it can be placed in two positions offset from each other by 180 °, which makes it possible to reverse the direction of rotation of the pump.
  • the pump according to the present invention is a pump comprising at least one piston, each piston being associated with a suction valve, these valves being returned to the closed position by a spring, characterized in that the return spring of the valve d suction is associated on the one hand with said valve and on the other hand with a pusher actuated cyclically by a cam driven by the drive shaft of the pump so that the action of said spring on the valve is canceled at the start from the suction phase and restored at the end of said suction phase.
  • FIG. 1 shows a hydraulic pump with axial pistons and bias plate.
  • This pump is constituted by a drive shaft 1 carrying a bias plate 2 on the front face 2a of which bear a plurality of pistons 3, each piston 3 resting against said front face 2a of the bias plate 2 by a sliding pad 4.
  • Each piston 3 is held in abutment on its shoe 4 by a spring 5 and moves in a cylinder 6.
  • Each cylinder 6 communicates by an orifice 7 with an intake chamber 8 which, itself, communicates with the reservoir 9 by a pipe 10.
  • Each orifice 7 is provided with a suction valve 11.
  • Each valve 11 has a rod 12 which slides freely in a bearing 13 and which projects into a bore 14 inside which a hollow piston 15 which can be pushed back can slide by a spring 16.
  • the rod 12 of the valve 11 penetrates inside the hollow piston 15 through an orifice 17 in which it slides.
  • the rod 12 of the valve 11 has a stop 18 which in FIG. 1 is constituted by a circlip and which in FIGS. 2 and 3 is schematically represented by a disc integral with the end of the rod 12.
  • a housing 19 in which is disposed, with a certain clearance, a ball 20 which bears against a cam 21 carried by a rod 22 driven by the shaft 1.
  • valve 11 is pushed at the end of the suction phase in the closed position by a spring 16 which is determined so as to exert a forceful closing reminder; but that from the start of the suction phase, the effect of this return spring 16 is eliminated by the cam 21, the valve 11 then being a free valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP19850402018 1984-10-19 1985-10-18 Hydraulische Kolbenpumpe mit zwangsläufig angetriebenen Einlassventilen Expired EP0180510B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8416051 1984-10-19
FR8416051A FR2572138B1 (fr) 1984-10-19 1984-10-19 Pompe hdraulique a pistons et a clapets d'aspiration commandes

Publications (2)

Publication Number Publication Date
EP0180510A1 true EP0180510A1 (de) 1986-05-07
EP0180510B1 EP0180510B1 (de) 1988-11-30

Family

ID=9308834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850402018 Expired EP0180510B1 (de) 1984-10-19 1985-10-18 Hydraulische Kolbenpumpe mit zwangsläufig angetriebenen Einlassventilen

Country Status (3)

Country Link
EP (1) EP0180510B1 (de)
DE (1) DE3566569D1 (de)
FR (1) FR2572138B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004106735A1 (fr) * 2003-05-28 2004-12-09 Claude Albert Waudoit Systeme de transformation d'energie a appareil volumetrique
US10107279B2 (en) 2012-12-10 2018-10-23 Kongsberg Automotive Ab Unitary fluid flow apparatus for inflating and deflating a device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19708922B4 (de) * 1996-03-13 2006-05-18 Volkswagen Ag Hydraulische Axialkolbenpumpe mit einem Gehäuse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB581735A (en) * 1942-09-23 1946-10-23 Oliver Bevir Improvements in and relating to hydraulic pumps
DE3044363A1 (de) * 1979-11-26 1981-06-04 Hydro René Leduc, S.A., Azerailles, Baccarat Pumpe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB581735A (en) * 1942-09-23 1946-10-23 Oliver Bevir Improvements in and relating to hydraulic pumps
DE3044363A1 (de) * 1979-11-26 1981-06-04 Hydro René Leduc, S.A., Azerailles, Baccarat Pumpe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004106735A1 (fr) * 2003-05-28 2004-12-09 Claude Albert Waudoit Systeme de transformation d'energie a appareil volumetrique
BE1015545A3 (fr) * 2003-05-28 2005-06-07 Waudoit Claude Albert Systeme de transformation d'energie a appareil volumetrique.
US10107279B2 (en) 2012-12-10 2018-10-23 Kongsberg Automotive Ab Unitary fluid flow apparatus for inflating and deflating a device

Also Published As

Publication number Publication date
FR2572138A1 (fr) 1986-04-25
EP0180510B1 (de) 1988-11-30
DE3566569D1 (en) 1989-01-05
FR2572138B1 (fr) 1987-01-23

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