EP0528718A1 - Hydraulischer Motor mit abwechselnder Bewegungsrichtung - Google Patents

Hydraulischer Motor mit abwechselnder Bewegungsrichtung Download PDF

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Publication number
EP0528718A1
EP0528718A1 EP92402240A EP92402240A EP0528718A1 EP 0528718 A1 EP0528718 A1 EP 0528718A1 EP 92402240 A EP92402240 A EP 92402240A EP 92402240 A EP92402240 A EP 92402240A EP 0528718 A1 EP0528718 A1 EP 0528718A1
Authority
EP
European Patent Office
Prior art keywords
chamber
pistons
piston
exhaust
inlet
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Withdrawn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
EP92402240A
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English (en)
French (fr)
Inventor
Philippe Cloup
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0528718A1 publication Critical patent/EP0528718A1/de
Withdrawn legal-status Critical Current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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
    • F04B9/1035—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber the movement of the pump piston in the two directions being obtained by two single-acting liquid motors each acting in one direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L23/00—Valves controlled by impact by piston, e.g. in free-piston machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/03—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with movement in two directions being obtained by two single-acting piston liquid engines, each acting in one direction
    • F03C1/035—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with movement in two directions being obtained by two single-acting piston liquid engines, each acting in one direction one single-acting piston being always under the influence of the liquid under pressure

Definitions

  • the present invention relates to a reciprocating hydraulic motor disposed between a fluid inlet pipe at a pressure P1 and a fluid exhaust pipe at a pressure P2 lower than P1.
  • Differential hydraulic motors which use pistons of different cross section slidably mounted in a stepped cylinder and various mechanisms for putting in communication the different chambers delimited by the pistons and the stepped cylinder.
  • energy is drawn from the main fluid, as a direct function of the flow of fluid passing through the engine, and of the pressure difference between the inlet and its exhaust.
  • These motors generally have pistons whose surface area is usually 1 to 2. They are mainly used to drive external pumps for secondary fluid and in particular metering devices.
  • the object of the present invention is to propose a different alternative hydraulic motor.
  • the alternative hydraulic motor proposed comprises: a movable coupling having first and second pistons linked together by a piston rod, first and second cylinder bodies placed end to end and in the respective bores from which said first and second pistons can slide in leaktight manner, said piston rod sliding in leaktight manner in an orifice formed in a wall common to said cylinder bodies, said first piston sharing the bore of said first cylinder body in an inlet chamber into which opens said fluid inlet pipe at pressure P1, and in a first intermediate chamber, said second piston sharing the bore of said second body cylinder into an exhaust chamber in which opens the fluid exhaust duct at pressure P2 and into a second intermediate chamber, means for permanently communicating said first intermediate chamber with said second intermediate chamber, and means for alternating said inlet chamber and said exhaust chamber in communication with said intermediate chambers.
  • Said inlet chamber and said exhaust chamber are situated on the same side with respect to their respective piston.
  • the sections of the two pistons of the movable coupling have substantially equal dimensions.
  • the purpose of the particular distribution of the main fluid is, in each direction of movement, to cancel the effect of one of the two pistons, and to use the pressure difference between the faces of the other piston to cause the displacement of this one.
  • the means for alternating between said inlet chamber and said exhaust chamber in communication with said intermediate chambers comprise a three-way distributor mounted in the wall common to said cylinder bodies and means for actuating said distributor.
  • Pipes connecting the inlet conduit and the exhaust conduit with said distributor are formed in said common wall.
  • said distributor comprises a sleeve mounted to slide and seal in a cavity formed in said common wall, said cavity being coaxial with said piston rod and opening into the intermediate chamber adjacent to said common wall.
  • the means for actuating said dispenser comprise trigger rods carried by said sleeve and capable of cooperating with the internal walls of said pistons.
  • said motor is intended to actuate a metering pump of the type comprising a pump piston slidably mounted in a metering chamber
  • said metering chamber is advantageously formed by a bore formed in said piston rod and passing through one pistons of said movable coupling, and the pump piston is disposed in said bore and is fixed relative to said cylinder bodies.
  • the drawing shows an alternative hydraulic motor 1 comprising two coaxial cylinder bodies 2 and 3, placed end to end and linked by a common wall 4.
  • first piston 6 In the bore 5 of the first cylinder body 2 is slidably mounted a first piston 6 sharing the bore 5 in an inlet chamber 7 located between the piston 6 and the end wall 8 of the cylinder body 2 and in a first intermediate chamber 9 located between the piston 6 and the common wall 4.
  • a second piston 11 sharing the bore 10 in an exhaust chamber 12 located between the piston 11 and the common wall 4 and in a second intermediate chamber 13 located between the piston 11 and the end wall 14.
  • Seals 14a, 14b are mounted on the pistons 6 and 11.
  • the pistons 6 and 11 are linked together by means of a piston rod 15 which slides in an orifice 16 provided in the common wall 4 with interposition of a seal 17.
  • the inlet chamber 7 communicates permanently with an inlet conduit 18 of fluid at pressure P1.
  • the exhaust chamber 12 is in permanent communication with an exhaust duct 19 for fluid at a pressure P2 lower than P1.
  • the intermediate chamber 9 and the second intermediate chamber 13 are placed in permanent communication by a conduit 20, and are always at the same pressure.
  • the inlet chamber 7 and the exhaust chamber 12 are alternately placed in communication with the intermediate chambers 9 and 13 by means 21 described below.
  • the conduit 20 which connects the intermediate chambers 9 and 13 is arranged in the piston rod 15 and in the piston 11. It opens into the intermediate chamber 9 by a first orifice 22 and in the intermediate chamber 13 by a second orifice 23.
  • the conduit 20 also passes through the piston 6.
  • the means 21, making it possible to alternate between the inlet chamber 7 and the exhaust chamber with the intermediate chambers 9 and 13, comprise a trigger rod 24 and valves 25 and 26.
  • the trigger rod 24 is slidably mounted in the duct 20.
  • the end of the trigger rod 24 which is located in the inlet chamber 7 has a valve 25 capable of cooperating with a valve seat 27 formed at the mouth of the conduit 20.
  • the other end of the trigger rod 24 is provided with a rod 28 supporting at least one valve 26 capable of cooperating with a valve seat 29 provided in the wall of the piston 11 at the mouth of a conduit 30 connecting the exhaust chamber 12 and the second intermediate chamber 13.
  • the diameter of the trigger rod 24 is less than the diameter of the conduit 20, so that the intermediate chambers communicate with each other permanently.
  • Figure 1 shows the engine 1 when the movable coupling moves to the right (arrow D); the valve 25 is closed and the valves 26 are open.
  • the inlet chamber 7 is always at pressure P1.
  • the exhaust chamber 12 is always at pressure P2.
  • the intermediate chambers 9 and 13 communicate with the exhaust chamber 12 via the orifice 22, the conduit 20, the orifice 23 and the orifices 30.
  • the pressure difference P1-P2 which is exerted on the two faces of the piston 6 causes the movable coupling to move to the right, and a discharge of fluid towards the exhaust duct 19.
  • the conduit 20 is formed in the common wall 4.
  • the conduit 20 communicates the first intermediate chamber 9 with a first annular chamber 31 surrounding the second cylinder body 3 and communicating with the second bedroom intermediate 13.
  • a second annular chamber 32 communicating with the inlet chamber 7 also surrounds the first cylinder body 2.
  • the inlet 18 and exhaust 19 conduits are connected to the common wall 4.
  • This common wall has a cavity 33 coaxial with the piston rod 15 and opening into the first intermediate chamber 9.
  • a sleeve 34 is slidably and sealingly mounted in the cavity 33.
  • This sleeve 34 is provided with axial trigger rods 35a and 35b capable of cooperating respectively with the internal faces of the pistons 6 and 11 for axially displacing the sleeve 34.
  • the sleeve 34 has in its wall distribution passages 36 capable of coming opposite annular cavities 37a and 37b surrounding the sleeve 34 and communicating respectively with the conduits inlet 18 and exhaust 19.
  • the sleeve 34 forms with the cavities 37a and 37b and the cavity 33 a three-way distributor.
  • FIGs 3 and 4 show a metering device 40 driven by the motor 1.
  • This metering device 40 consists of a three-way valve 41, a pump piston 42 and a metering chamber 43.
  • the metering chamber 43 of variable volume is formed by a bore 44 formed in the piston rod 15 and passing through the piston 6.
  • the pump piston 42 is fixed.
  • a conduit 46 is formed in the pump piston 42 and its rod 47 to put the metering chamber 43 into communication with the three-way valve 41.
  • the movement to the left of the movable coupling constituted by two pistons 6 and 11 and the piston rod 15 (arrow G in FIG. 3), causes the metering chamber 43 to be filled with a dose of additional product drawn into the bottle 48.
  • the displacement of the movable coupling to the right causes the evacuation of the dose of additional product contained in the metering chamber 43 to the discharge conduit 49 of the dose of additional product.
  • FIG 3 shows the engine when the movable hitch moves to the left.
  • the sleeve 34 is positioned to the right of the common wall 4, the trigger rod 35a is located in the first intermediate chamber 9.
  • the annular cavity 37b is in communication with the cavity 33.
  • the intermediate chambers 9 and 13 are therefore at pressure P2.
  • the exhaust chamber 12 is at pressure P2.
  • the inlet chamber 7 is alone at the pressure P1.
  • a force is exerted on the piston 6 which moves the movable coupling to the left.
  • the internal face of the piston 6 abuts on the trigger rod 35a, which causes the displacement of the sleeve 34 to the left.
  • the cavity 37b is insulated.
  • the cavity 37a is in communication with the cavity 33 via the distribution passage 36.
  • the intermediate chambers 9 and 13 are at pressure P1.
  • the trigger rod 35b is located in the exhaust chamber 12. A pressure result is exerted on the piston 11 which displaces the movable coupling to the right (arrow D in FIG. 4). Finally the internal face of the piston 11 abuts on the trigger rod 35b, which causes the displacement of the sleeve 34 to the right, and a reversal of the movement of the engine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP92402240A 1991-08-08 1992-08-06 Hydraulischer Motor mit abwechselnder Bewegungsrichtung Withdrawn EP0528718A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9110142 1991-08-08
FR9110142A FR2680204B1 (fr) 1991-08-08 1991-08-08 Moteur hydraulique alternatif.

Publications (1)

Publication Number Publication Date
EP0528718A1 true EP0528718A1 (de) 1993-02-24

Family

ID=9416069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402240A Withdrawn EP0528718A1 (de) 1991-08-08 1992-08-06 Hydraulischer Motor mit abwechselnder Bewegungsrichtung

Country Status (2)

Country Link
EP (1) EP0528718A1 (de)
FR (1) FR2680204B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE258157C (de) *
US2370068A (en) * 1943-11-01 1945-02-20 Stewart Warner Corp Air motor for lubricating pumps
US3628419A (en) * 1969-08-21 1971-12-21 Doughton Mfg Co Inc Fluid-operated motor
FR2438740A1 (fr) * 1978-10-13 1980-05-09 Mirkovic Radivoje Moteur axial pneumatique
WO1986007118A1 (en) * 1985-05-24 1986-12-04 Ethan Silva Fluid pressure intensifier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE258157C (de) *
US2370068A (en) * 1943-11-01 1945-02-20 Stewart Warner Corp Air motor for lubricating pumps
US3628419A (en) * 1969-08-21 1971-12-21 Doughton Mfg Co Inc Fluid-operated motor
FR2438740A1 (fr) * 1978-10-13 1980-05-09 Mirkovic Radivoje Moteur axial pneumatique
WO1986007118A1 (en) * 1985-05-24 1986-12-04 Ethan Silva Fluid pressure intensifier

Also Published As

Publication number Publication date
FR2680204B1 (fr) 1993-11-19
FR2680204A1 (fr) 1993-02-12

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