EP2828520A1 - Intern drainierter hydraulikmotor - Google Patents

Intern drainierter hydraulikmotor

Info

Publication number
EP2828520A1
EP2828520A1 EP13715290.6A EP13715290A EP2828520A1 EP 2828520 A1 EP2828520 A1 EP 2828520A1 EP 13715290 A EP13715290 A EP 13715290A EP 2828520 A1 EP2828520 A1 EP 2828520A1
Authority
EP
European Patent Office
Prior art keywords
hydraulic motor
hydraulic
port
intermediate pipe
motor according
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
EP13715290.6A
Other languages
English (en)
French (fr)
Other versions
EP2828520B1 (de
Inventor
François 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 Leduc SAS
Original Assignee
Hydro Leduc SAS
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 Leduc SAS filed Critical Hydro Leduc SAS
Publication of EP2828520A1 publication Critical patent/EP2828520A1/de
Application granted granted Critical
Publication of EP2828520B1 publication Critical patent/EP2828520B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F04B1/20—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 rotary cylinder block
    • F04B1/22—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 rotary cylinder block having two or more sets of cylinders or pistons
    • F04B1/24—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 rotary cylinder block having two or more sets of cylinders or pistons inclined to the main shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • 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
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0639—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • F03C1/0642—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons inclined on main shaft axis
    • 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
    • F03C1/08—Distributing valve-gear peculiar thereto
    • F03C1/14—Distributing valve-gear peculiar thereto by driving liquid of engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/15—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor with special provision for automatic return
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves

Definitions

  • the drive motor M which may be an electric motor, an internal combustion engine or the like, drives a pump P, the high pressure output of which is connected to a distributor D, which allows to selectively realize several types of hydraulic connections between the output of the pump P and two supply lines A and B connected to the hydraulic motor H.
  • the distributor D In the neutral position shown, the distributor D connects the two pipes A and B to the tarpaulin 99. The hydraulic motor H is therefore not powered.
  • the other two positions of the distributor D allow:
  • a drainage pipe 98 connects the housing of the hydraulic motor H to the tarpaulin 99.
  • the motor must be the drive element of tools that equip sets to be connected to the gear arms.
  • the present invention aims to eliminate this disadvantage.
  • the invention provides a hydraulic motor that can be actuated in both directions, the hydraulic motor comprising two bidirectional hydraulic ports each of which can be connected, selectively according to the direction of rotation in which the motor is to be actuated, ie to a source of pressurized liquid to serve as a hydraulic motor supply port, ie at a device for collecting the liquid at a lower pressure to serve as a return port for the hydraulic motor, the hydraulic motor comprising a drainage orifice communicating with an interior space of the motor housing, characterized in that it comprises:
  • a second non-return valve disposed between the intermediate pipe and a second bidirectional hydraulic port and able to open under the effect of a positive pressure differential between the intermediate pipe and the second bidirectional hydraulic port.
  • the return pipe of the motor also serves as a drainage pipe, which makes it possible to eliminate the separate drainage pipes usually used.
  • the invention further comprises all or part of the following provisions.
  • the intermediate pipe communicates between the two check valves with an accumulator responsible for absorbing the pressure peaks each time there is a reversal of the direction of the fluid and therefore, the direction of rotation of the hydraulic motor.
  • the hydraulic motor further comprises an output shaft accessible from outside the housing and, inside the housing:
  • a plate integral with the motor shaft and comprising a plurality of spherical housings
  • a cylinder mounted to rotate on a pivot whose axis is at an angle with the axis of the motor shaft
  • each piston sliding in cylindrical bores formed axially in the barrel, each piston comprising a spherical head received in one of the spherical housing of the plateau, and
  • the casing comprises a yoke on which are arranged the two bidirectional hydraulic ports of the engine.
  • the intermediate pipe and the two non-return valves are arranged in the cylinder head.
  • the bidirectional hydraulic ports comprise orifices formed in the cylinder head.
  • the cylinder head comprises the accumulator responsible for absorbing the pressure peaks connected to the intermediate pipe.
  • the drainage orifice extends through the cylinder head to connect the intermediate pipe to a zone of the housing located behind the ice distribution.
  • FIG. 1 is a block diagram of a hydraulic motor according to one embodiment of the invention.
  • FIG. 1 is a longitudinal sectional view of an exemplary embodiment of the hydraulic motor of Figure 1.
  • FIG. 3 is a view of a detail, in section along the line D-D of FIG. 2.
  • FIG. 4 is a block diagram of a hydraulic system according to the state of the art.
  • FIG. 1 represents a hydraulic motor 1 according to the invention that can be arranged in the hydraulic system of FIG. 4 in place of the motor H of FIG. 4.
  • the valve 3 When the line A is the supply line and the line B the return line, the valve 3 is kept closed by the high pressure; while the valve 4 is subjected to the pressure back to the tarpaulin.
  • the internal leaks occurring inside the engine 1 are collected by the pipe 5. When the pressure of these internal leaks increases, the liquid in the line 5 opens the valve 4 and joins the return line B to the tank.
  • This arrangement makes it possible to absorb the pressure peaks that may occur during a sudden change in the direction of rotation of the motor, that is to say a sudden reversal of the high pressure and low pressure sides.
  • FIGS 2 and 3 illustrate an embodiment of the invention.
  • a housing 10 is disposed a shaft 11 carrying a plate 12 having a plurality of spherical housings 13 in which are disposed the spherical heads 14 of pistons 15, which slide in cylinders 16 formed in a cylinder 17.
  • the barrel 17 is mounted in pivoting on a pivot 19 whose axis is at an angle to the axis of the shaft 1.
  • the rear face of the cylinder 17 rests against a dispensing window 18. This type of hydraulic motor broken axis is known.
  • the yoke 20 of the casing 10 comprises the means described with reference to FIG.
  • Line A of FIG. 1 arrives at the motor via port 21 and line B through port 22 (FIG. 3).
  • the pipe 23, which corresponds to the pipe 2 of FIG. 1, comprises two non-return valves 25 and 26, which correspond to the valves 3 and 4 of FIG. 1. Between these two valves 25 and 26 arrives the pipe 27, which corresponds to the conduct 5.
  • a passage 28 ( Figure 2), corresponding to the pipe 6 of Figure 1 communicates the conduit 23 with an accumulator capable of absorbing the pressure peaks at the change of direction of rotation of the hydraulic motor.
  • the accumulator 29 is made by a piston pushed by compression springs but this choice is not limiting. In particular, the accumulator 29 prevents the pressure exceeding the sealing limit of the front seal of the housing 10 during a sudden reversal of the direction of rotation of the motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Motors (AREA)
EP13715290.6A 2012-03-19 2013-03-08 Intern drainierter hydraulikmotor Not-in-force EP2828520B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1252426A FR2988143B1 (fr) 2012-03-19 2012-03-19 Moteur hydraulique a drainage interne
PCT/FR2013/050499 WO2013140064A1 (fr) 2012-03-19 2013-03-08 Moteur hydraulique a drainage interne

Publications (2)

Publication Number Publication Date
EP2828520A1 true EP2828520A1 (de) 2015-01-28
EP2828520B1 EP2828520B1 (de) 2016-03-02

Family

ID=48083470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13715290.6A Not-in-force EP2828520B1 (de) 2012-03-19 2013-03-08 Intern drainierter hydraulikmotor

Country Status (4)

Country Link
US (1) US20150059326A1 (de)
EP (1) EP2828520B1 (de)
FR (1) FR2988143B1 (de)
WO (1) WO2013140064A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3012181A1 (fr) * 2013-10-22 2015-04-24 Hydro Leduc Pompe hydraulique a pistons a distribution par glace bi-directionnelle

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504987B1 (fr) * 1981-05-04 1986-04-18 Poclain Hydraulics Sa Mecanisme a fluide sous pression comportant des galets de reaction portes par des pistons
KR900003793B1 (ko) * 1986-08-25 1990-05-31 가부시키가이샤 히타치세이사쿠쇼 액셜피스톤기계의 스러스트 정압베어링 지지장치
JP2000199479A (ja) * 1998-10-30 2000-07-18 Toyota Autom Loom Works Ltd 可変容量型圧縮機
DE10210877A1 (de) * 2002-03-12 2003-11-27 Wabco Gmbh & Co Ohg Ventileinrichtung für Stellzylinder
FI118233B (fi) * 2003-04-01 2007-08-31 Sampo Hydraulics Oy Radiaalimäntähydraulimoottori ja menetelmä radiaalimäntähydraulimoottorin säädössä
JP4365870B2 (ja) * 2007-03-30 2009-11-18 三菱重工業株式会社 流体圧アクチュエータ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013140064A1 *

Also Published As

Publication number Publication date
US20150059326A1 (en) 2015-03-05
FR2988143B1 (fr) 2014-04-11
FR2988143A1 (fr) 2013-09-20
WO2013140064A1 (fr) 2013-09-26
EP2828520B1 (de) 2016-03-02

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