WO1985003979A1 - Pompe hydraulique - Google Patents

Pompe hydraulique Download PDF

Info

Publication number
WO1985003979A1
WO1985003979A1 PCT/EP1985/000078 EP8500078W WO8503979A1 WO 1985003979 A1 WO1985003979 A1 WO 1985003979A1 EP 8500078 W EP8500078 W EP 8500078W WO 8503979 A1 WO8503979 A1 WO 8503979A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
hydraulic
pump
hydraulic fluid
pistons
Prior art date
Application number
PCT/EP1985/000078
Other languages
German (de)
English (en)
Inventor
Frank Stelzer
Original Assignee
Frank Stelzer
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
Priority claimed from DE19848406908 external-priority patent/DE8406908U1/de
Priority claimed from DE19848417535 external-priority patent/DE8417535U1/de
Application filed by Frank Stelzer filed Critical Frank Stelzer
Publication of WO1985003979A1 publication Critical patent/WO1985003979A1/fr

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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B71/00—Free-piston engines; Engines without rotary main shaft
    • F02B71/04—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby
    • F02B71/045—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby with hydrostatic transmission
    • 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
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • 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
    • F04B9/109—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 plural pumping chambers
    • F04B9/117—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 plural pumping chambers the pumping members not being mechanically connected to each other
    • F04B9/1176—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 plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Definitions

  • the invention relates to a hydraulic pump which can be actuated by an internal combustion engine and "comprises a plurality of the hydraulic fluid promotional interacting piston springs pump piston.
  • Hydraulics are technical processes and systems for power transmission by means of liquids in closed line systems.
  • This power transmission and its devices can be referred to as hydraulic or hydrostatic drives.
  • special hydraulic fluids such as oil are used as transmission media.
  • Each hydraulic or hydrostatic drive is basically built up from the basic elements connected to a circuit, such as pumps, pressure lines, control and regulating elements and consumers, as well as auxiliary devices.
  • For the generation of hydraulic energy and its re-transformation into mechanical displacement pumps of various designs are used, mainly gear, vane, radial and axial pistons, pump and hydraulic motors as well as hydraulic cylinders. Many of these types allow the volume flow to be adjusted continuously.
  • the object of the present invention is to design a hydraulic pump of the type described above in such a way that, with a simple construction and drive, it is ensured that the hydraulic fluid is conveyed sufficiently steadily, as a result of which the rectilinear, pivoting or rotating mechanical energy taken from the hydraulic energy has the desired continuity. In particular, it should be ensured that the delivery pressure caused by the pump pistons is constant or almost constant.
  • the internal combustion engine is a piston engine with symmetrically free-floating step pistons, the outer piston steps of which each have at least three cylinder sections of different diameters, in which the inner section has the largest and the middle section the smallest show that the walls surrounding the piston have at least one step in the region of the three cylinder sections, whereby the volume enclosed between the facing end walls of the inner and outer cylinder sections can be changed when the step piston is reciprocated, and that in the step piston surrounding wall in the area of the outer cylinder section, that is to say in the range of motion of the (further ⁇ step) openings between the outer and inner cylinder section, in which the pump pistons acted upon by the piston springs are slidably arranged, w obei the relation of the hydraulic fluid to be acted upon surfaces of the openings associated pump piston whose position along the reciprocates reciprocating further stages from the outer to the inner 'grow out.
  • the teaching according to the invention accordingly provides a hydraulic pump with simple means, which pumps a large number of the hydraulic fluid in one Circulation-promoting pump pistons, which in turn can be inserted on a helical line in the wall surrounding the stepped piston and can be moved back and forth as a function of the stroke of the stepped piston, as a result of which the fluid flow rate is also regulated, with the ' Acceleration of the stepped piston is taken into account in such a way that the pump piston surfaces vary in order to produce a constant or almost constant delivery pressure via the pump piston itself.
  • the axially offset arrangement of the pump pistons ensures that a fluid, preferably also a hydraulic fluid such as oil, is applied to them in succession, so that there is a uniform delivery of the hydraulic fluid. Furthermore, the supply and delivery to the individual pump pistons. Drain lines of the hydraulic fluid are connected to one another, which results in structural advantages in terms of structure.
  • step in the wall surrounding the step piston in the region of the central cylinder section which results in a change in the volume between the end faces to the desired extent.
  • the pump pistons are then pressed radially outwards when the liquid located between the end faces can be pressed into the opening assigned to the respective pump piston.
  • the step between the central and outer cylinder section must reach in the region of a respective opening in order to establish a fluid connection. Accordingly, if the stepped piston is moved outwards, a successive radially outward movement of the stepped piston takes place at the same time. If this is moved inward, a vacuum is generated in the region of the opening having the pump pistons due to the increase in volume between the end faces, which means that the latter is radial be moved inwards. This ultimately ensures that the hydraulic fluid which is intended to drive a motor or the like is evenly conveyed by the pump piston.
  • the hydraulic pump according to the invention is preferably actuated by a free-flight piston engine which comprises a symmetrical free-floating stage piston which has three stage pistons, of which the outer piston stages each in one combustion chamber and the middle piston stage in a further chamber dividing them into two separate pre-compressor chambers are arranged, and that, depending on the stage piston division between a pre-compression chamber and the adjacent combustion chamber, a connection channel for fuel mixtures runs along the (middle " * piston section between the piston stages).
  • a free-flight piston engine which comprises a symmetrical free-floating stage piston which has three stage pistons, of which the outer piston stages each in one combustion chamber and the middle piston stage in a further chamber dividing them into two separate pre-compressor chambers are arranged, and that, depending on the stage piston division between a pre-compression chamber and the adjacent combustion chamber, a connection channel for fuel mixtures runs along the (middle " * piston section between the piston stages).
  • the teaching according to the invention consequently proposes a hydraulic pump which is hydraulically driven and controlled.
  • Fig. 1 shows a detail of a hydraulic pump with free-flight piston engine in a perspective view
  • FIG. 2 shows an enlarged illustration of a detail from FIG. 1 and
  • a motor 10 in the form of a two-stroke internal combustion engine is shown purely schematically, which comprises a stepped piston 14 which is exposed in a motor block 12 and which is axially freely movable.
  • the stepped piston 14 has a middle piston step 16 and two outer piston steps arranged symmetrically to it, of which only the outer left one is shown (reference numeral 18 ⁇ .
  • the outer piston steps have the same diameter, whereas the middle piston steps 16 have a larger diameter
  • a piston section 20 which can have a stage and / or piston rings 22.
  • the free-flight piston engine 10 comprises two combustion chambers, of which only the left combustion chamber is indicated in the exemplary embodiment and with the reference symbol 24.
  • the combustion chambers are arranged axially on the inside at the outer piston stages
  • the middle piston stage 16 is located in a further chamber 26, which is divided into two separate pre-compression chambers 28 and 30.
  • the connection is made possible by the fact that a channel, which is arranged cylindrically around the piston section 20, is no longer designated the stage or the piston ring 22. Is the piston stage 18 in the bottom dead center position, then the opposite symmetrically arranged piston stage is in the top dead center position, that is, in the compression position.
  • the channel also present there is closed the piston stage 18 is moved to the right according to the exemplary embodiment, the channel between the pre-compression chamber 30 and the combustion chamber (not shown on the right) is opened.
  • the intake of the fuel mixture is controlled by the position of the middle piston stage 16, which, depending on the position of the stage piston 14, establishes a connection between an opening 32 in the engine block wall and one of the pre-compression chambers 28 or 30.
  • the opening 32 is located in the middle between the end walls of the middle chamber 26.
  • the ignition in the combustion chambers 24 themselves can take place via a spark plug * 34 or a mantle, not shown.
  • the combustion chambers 24 finally have exhaust ducts 36, which extend from outlet slots which open into the combustion chambers 24 essentially tangentially.
  • the outer piston stage in the exemplary embodiment the outer piston stage 18 continues beyond the engine block 12 and has three cylindrical end sections 38, 40 and 42 which have different diameters.
  • the diameter of the inner cylinder section 38 is am largest, the smallest of the central cylinder section 40.
  • the wall surrounding the cylinder sections 38, 40, 42 has a step 44, which has the transition between cylindrical wall sections 46 and 48, which in turn corresponds to the diameter of the section 38 or . of section 42.
  • the step 44- is located in the area of the central cylinder section 40, regardless of whether the step piston 14 is in the top or bottom dead center position.
  • Step 44 makes it evident that the volume V, that between the facing end faces 50 and 52 of the inner and outer Cylinder 38 and 42 is enclosed, is changed depending on the position of the stepped piston 14. If the stepped piston 14 is in the right end position, the volume V is at a maximum, whereas the volume decreases the more the stepped piston 14 is moved to the left (a corresponding geometry and design of the right stepped piston, which is not shown in the drawings) ⁇ is also given, so that there is a completely symmetrical structure of the arrangement according to the invention There is now preferably a hydraulic fluid in the volume V, which acts on pump pistons 54 to 62 arranged on a helical line.
  • the piston surface acted upon by the hydraulic fluid is selected differently depending on the position of the pump piston along the region in which the end surface 52 moves back and forth as the step formed between the cylinder sections 40 and 42.
  • the areas of the pump pistons present in the middle movement area of the end face 52 are selected to be largest and the smallest in the area of the reversal points of stage 52. This is the schematic representation according to FIG. 3 can be seen. It can be seen that the areas to be pressurized are largest in the central region (110) and smallest in the peripheral regions (112, 114 ⁇ ).
  • the pump pistons 56 to 62 are located in radially extending openings 64, 66 which extend from the inner wall 48, the diameter of which is matched to that of the outer cylinder section 42.
  • Section 68 may be attached to engine block 10 by screws or the like. Accordingly, if the stepped piston 14 and thus the section 42 moves to the left, each pump piston, starting with the innermost pump piston 54, is acted upon by the hydraulic fluid which is located between the end walls 50 and 52. As a result, the pump pistons 54 to 62 are moved counter to the spring force acting on them, which is caused by coil springs 70 to 78 or similarly acting elements.
  • an inlet or outlet line 80, 84 or 82, 86 go above each pump piston which are connected to one another via ring channels 88 and 90 running in section 68, in order to be supplied via the main inlet and outlet lines 92 and 94 to the above-mentioned unit, which can also be referred to as a secondary part of a hydraulic system is used to convert the hydraulic energy into straight-line, pivoting or rotating mechanical energy.
  • one-way valves 96, 98, 100 and 102 are of course arranged in the inlet and outlet lines 80, 84 and 82, 86, via which the direction of flow of the hydraulic fluid is predetermined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Pompe hydraulique où le liquide hydraulique à refouler est déplacé au moyen du piston (14) d'un moteur à piston libre (10). Le liquide s'écoule grâce à des pistons plongeurs (56, 58, 60, 62) disposés dans la paroi (48) délimitant latéralement le piston (14) et placés sur une ligne hélicoïdale.
PCT/EP1985/000078 1984-03-07 1985-03-06 Pompe hydraulique WO1985003979A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19848406908 DE8406908U1 (de) 1984-03-07 1984-03-07 Hydraulikpumpe
DEG8406908.2U 1984-03-07
DE19848417535 DE8417535U1 (de) 1984-06-08 1984-06-08 Hydraulikpumpe
DEG8417535.4U 1984-06-08

Publications (1)

Publication Number Publication Date
WO1985003979A1 true WO1985003979A1 (fr) 1985-09-12

Family

ID=25949865

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1985/000078 WO1985003979A1 (fr) 1984-03-07 1985-03-06 Pompe hydraulique

Country Status (2)

Country Link
EP (1) EP0208683A1 (fr)
WO (1) WO1985003979A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006019791B4 (de) * 2005-06-18 2009-07-02 Oleg Tchebunin Kolbenmotoren in Modul-Elemente-Bauweise mit der kettenartigen Struktur
CN102287352A (zh) * 2011-07-28 2011-12-21 唐忠盛 直燃式柱塞液压泵
DE102006019756B4 (de) * 2006-04-28 2012-11-29 Oleg Tchebunin Ummanteltes Schaufelwerk mit hybridem kolbenhydraulischem Antrieb
DE102012001827A1 (de) 2012-01-26 2014-06-12 Oleg Tchebunin Antriebsanlage für ein Flugzeug mit hybridem kolbenhydraulischem Antrieb

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933283A1 (de) * 1979-08-17 1981-02-26 Alois Miggisch Hydraulik-turbinen-motor
DE2946529A1 (de) * 1979-11-17 1981-05-27 Frieseke & Hoepfner Gmbh, 8520 Erlangen Druckgeregelte mehrzylinder-kolbenpumpe
EP0045472A1 (fr) * 1980-08-05 1982-02-10 Regie Nationale Des Usines Renault Générateur hydraulique à moteur à piston libre
DE3327334A1 (de) * 1983-07-29 1985-02-07 Dieter 8940 Memmingen Schneeweiß Zweitakt-brennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933283A1 (de) * 1979-08-17 1981-02-26 Alois Miggisch Hydraulik-turbinen-motor
DE2946529A1 (de) * 1979-11-17 1981-05-27 Frieseke & Hoepfner Gmbh, 8520 Erlangen Druckgeregelte mehrzylinder-kolbenpumpe
EP0045472A1 (fr) * 1980-08-05 1982-02-10 Regie Nationale Des Usines Renault Générateur hydraulique à moteur à piston libre
DE3327334A1 (de) * 1983-07-29 1985-02-07 Dieter 8940 Memmingen Schneeweiß Zweitakt-brennkraftmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006019791B4 (de) * 2005-06-18 2009-07-02 Oleg Tchebunin Kolbenmotoren in Modul-Elemente-Bauweise mit der kettenartigen Struktur
DE102006019756B4 (de) * 2006-04-28 2012-11-29 Oleg Tchebunin Ummanteltes Schaufelwerk mit hybridem kolbenhydraulischem Antrieb
CN102287352A (zh) * 2011-07-28 2011-12-21 唐忠盛 直燃式柱塞液压泵
DE102012001827A1 (de) 2012-01-26 2014-06-12 Oleg Tchebunin Antriebsanlage für ein Flugzeug mit hybridem kolbenhydraulischem Antrieb

Also Published As

Publication number Publication date
EP0208683A1 (fr) 1987-01-21

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