EP4136354A1 - Machine à engrenages intérieurs - Google Patents

Machine à engrenages intérieurs

Info

Publication number
EP4136354A1
EP4136354A1 EP21716271.8A EP21716271A EP4136354A1 EP 4136354 A1 EP4136354 A1 EP 4136354A1 EP 21716271 A EP21716271 A EP 21716271A EP 4136354 A1 EP4136354 A1 EP 4136354A1
Authority
EP
European Patent Office
Prior art keywords
pressure
internal gear
connection
gear machine
switching
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.)
Pending
Application number
EP21716271.8A
Other languages
German (de)
English (en)
Inventor
Thomas Pippes
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.)
Hydraulik Nord Technologies GmbH
Original Assignee
Hydraulik Nord Technologies GmbH
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 Hydraulik Nord Technologies GmbH filed Critical Hydraulik Nord Technologies GmbH
Publication of EP4136354A1 publication Critical patent/EP4136354A1/fr
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/101—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with a crescent-shaped filler element, located between the inner and outer intermeshing members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/04—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for reversible machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0046—Internal leakage control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0088—Lubrication
    • F04C15/0092—Control systems for the circulation of the lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C15/064—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086—Carter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings

Definitions

  • the invention relates to an internal gear machine for reversing operation with the features mentioned in the preamble of claim 1.
  • WO 2018/172059 A1 EP 1 110000 B1 and DE 4338875 C2 each disclose internal gear machines for reversing operation, in which an externally toothed pinion and an internally toothed ring gear are arranged in a meshing manner in a cavity of a housing.
  • the axes of rotation of the inner pinion and the ring gear are arranged parallel and spaced apart from one another, so that they are eccentric to one another.
  • a filler piece is arranged in a sickle-shaped cavity resulting between the pinion and the ring gear.
  • the cavity of the housing is also delimited axially.
  • the housing has fluid connections which are in communication with pressure pockets provided in the housing.
  • Such reversible internal gear machines can thus be used as a pump in both directions of rotation of the driven pinion.
  • so-called four-quadrant operation is also possible, that is, by applying a fluid to one of the pressure connections of the internal gear machine, it can also be operated as a hydraulic motor. Mutual operation is also possible here.
  • the invention is based on the object of creating an internal gear machine of the generic type in which leakage in the ring gear bearing is minimized in a simple manner during the zero crossing or when pressure is applied on both sides.
  • this object is achieved by an internal gear machine with the features mentioned in claim 1. Because in the connection between the pressure pocket and Pressure connection, i.e. in both connections between pressure pocket and pressure connection on each bearing side, a switching valve is arranged that opens or closes the connection depending on the pressure, it is advantageously possible to control the internal gear machine so that only one pressure pocket is always pressurized. As a result, the hydrostatic ring gear bearing can be switched very advantageously into a hydrodynamic ring gear bearing. Leakage between the two pressure sides, in particular when there is a zero crossing or pressure is applied on both sides, can thus be avoided, since pressure on both sides of the ring gear bearing is avoided.
  • the switching valves are hydraulically spring-loaded two-position valves.
  • the switchover function between the hydrostatic ring gear bearing and the hydrodynamic ring gear bearing can thus be easily integrated into the internal gear machine.
  • a spring side of a first switching valve is connected to a second pressure connection of the internal gear machine and a spring side of a second switching valve is connected to a first pressure connection of the internal gear machine.
  • a preferred embodiment of the invention provides that the switching sides of the switching valves are connected to the respective pressure connection of the internal gear unit assigned to the switching valve.
  • the pressure difference between the two pressure connections in the internal gear machine can be applied to the switching valves arranged in the connections between pressure pockets and pressure connection in a simple manner.
  • an opening pressure of the switching valves can be adjusted via a bias of switching springs of the switching valves.
  • an opening pressure of the switching valves is ⁇ 30 bar, in particular ⁇ 20 bar. This means that the ring gear bearings can be switched over from the hydrostatic to the hydrodynamic state very sensitively and quickly.
  • the internal gear machine can thus also be operated at high pressure applied to the pressure connections of, for example,> 300 bar without significant or without leakage.
  • control of the switching valves can also take place electromagnetically.
  • the pressures applied to the internal gear machine are then converted into control signals by means of a control device, which are used to control the corresponding switching magnets of the switching valves.
  • Figure 1 is a sectional view of an internal gear machine
  • Figures 2 and 3 a sectional view of the internal gear machine according to section line l-l and the section line II-II in Figure 1,
  • FIG. 4 shows an enlarged illustration of a switching valve
  • FIG. 5 shows a basic circuit diagram of the internal gear machine according to the invention.
  • FIG. 1 shows a sectional view of an internal gear machine designated as a whole by 10.
  • the internal gear machine 10 is designed for a so-called reversing operation, that is, it can be operated as a pump in both directions of rotation.
  • the internal gear machine 10 can also be operated in what is known as four-quadrant operation.
  • the internal gear machine 10 has a housing 12 within which a cavity 14 is formed.
  • An externally toothed pinion 16 and an internally toothed ring gear 18 are arranged in the cavity 14.
  • the pinion 16 is about a longitudinal axis 20 and the Ring gear 18 is arranged rotatably about a longitudinal axis 22.
  • the longitudinal axes 20 and 22 thus form axes of rotation on the one hand for the pinion 16 and on the other hand for the ring gear 18.
  • the axes of rotation are arranged parallel and spaced from one another.
  • Pinion 16 and ring gear 18 are arranged in such a way that they mesh with one another with their external toothing or internal toothing.
  • a filler piece 26 is arranged within a sickle-shaped free space 24 resulting between pinion 16 and ring gear 18.
  • the filler piece 26 has two filler piece parts 28 and 30, which are arranged on both sides of a stop pin 32. These filler piece parts 28 and 30 each consist of inner sealing segments 34 and outer sealing segments 36. The gap between inner sealing segments 32 and outer sealing segments 34 is sealed by sealing rollers 38.
  • pressure pockets 40 and 42 which are each connected to a fluid connection 44 and fluid connection 46 of the internal gear machine 10.
  • the pressure pockets 40 and 42 and thus the fluid connections 44 and 46 are connected to the cavity 14 via the control geometries 48 and 50.
  • FIGS. 2 and 3 sectional views are shown in a stepped section through several planes through the internal gear machine 10 along the section lines I-I and II-II, respectively.
  • the housing 12 is constructed in three parts and consists of a housing ring 52 and a flange cover 54 or connection cover 56.
  • the housing ring 52 here encloses the cavity 14 in which the pinion 16 and ring gear 18 as well as the filler piece 26 are arranged.
  • the pinion 16 is connected to a shaft 58 which is guided in a sealing manner through the flange cover 54 and which, depending on the operating mode, acts as a drive shaft or an output shaft in the internal gear machine.
  • the shaft 58 is preferably supported hydrodynamically by bearing bushes 59.
  • the cavity 14 is axially sealed by axial pressure plates 57 which are arranged in the axial direction between the ring gear 18 and the connection cover 56 or flange cover 54.
  • a switching valve 60 assigned to the pressure pocket 42 and a switching valve 62 assigned to the pressure pocket 40 are integrated within the housing 12.
  • the switching valves 60 and 62 are provided within the housing ring 52.
  • the switching valves 60 and 62 are hydraulically spring-loaded two-position valves.
  • the switching valves 60 and 62 comprise a control piston 68 and 70, respectively, which can be displaced within a cavity against the force of a spring element 64 and 66, respectively.
  • the spring side of the control piston 68 of the switching valve 60 is connected to the pressure connection 44 and thus to the fluid connection 44 via a connection 72.
  • the switching valve 60 is connected to the pressure connection 46 via a connection 74.
  • This connection takes place via a further connection 76, which connects the switching valve 60 to the displacement chamber 78 assigned to the pressure pocket 42 and thus also to the pressure connection 46 of the internal gear machine 10.
  • Another connection 77 connects the switching valve 62 to the pressure pocket 42.
  • the spring side of the switching valve 62 is connected to the pressure connection 46 via a connection 80.
  • the switching side of the switching valve 62 is connected to the pressure connection 44 via a connection 82.
  • the switching valve 62 is connected via a connection 84 to a displacement chamber 86 of the internal gear machine 10 assigned to the pressure connection 44.
  • Another connection 85 connects the switching valve 62 to the pressure pocket 40.
  • connection 72 opens into the interior 90 on the spring side and the connection 74 on the opposite switching side. Furthermore, the connection 77 opens into the interior 90, which is sealed by the control piston 68 in the illustration shown.
  • connection 74 exceeds the pressure applied to the connection 72 plus the compressive force of the spring 64, the control piston 68 is displaced to the right in the plane of the paper as shown in FIG. This will make over Passages 92 within the control piston 68 establish a continuous connection between the connections 74 and 77.
  • the switching valve 60 thus switches from its blocking division shown in FIG. 4 into the open position. There is then a continuous connection between the pressure pocket 42 and the pressure connection 46 and thus the displacement chamber 78.
  • Each pressure pocket is assigned a switching valve, here the pressure pocket 40 the switching valve 62 and the pressure pocket 42 the switching valve 60.
  • the respective spring side of the switching valves 60 and 62 is connected here via the connection 72 and 80 to the respectively opposite displacement chamber 86 and 78.
  • the switching side of the switching valves 60 and 62 is connected to the equilateral displacement chamber 78 and 86 via the connections 74/76 and connections 82/84, respectively.
  • the preload of the springs corresponds to an opening pressure of approx. 20 bar.
  • Both switching valves 60 and 62 are shown in their closed position in FIG. In this case, there is a pressure difference between the pressures present in the displacement chambers 86 and 78, which is less than the opening pressure of the switching valves 60 and 62, which is approximately 20 bar, for example.
  • the two pressure pockets 42 and 40 are therefore not supplied with pressure due to the closed position of the switching valves 60 and 62.
  • the ring gear 18 is thus mounted hydrodynamically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)
  • Rotary Pumps (AREA)

Abstract

L'invention concerne une machine à engrenages intérieurs (10) pour un fonctionnement réversible qui comporte un carter (12) doté d'un espace creux (14), espace creux (14) dans lequel sont montés un pignon (16) à denture extérieure et une couronne (18) à denture intérieure, qui sont en engrènement mutuel, dont les axes de rotation (20, 22) sont parallèles et à distance mutuelle. L'espace creux (14) du carter (12) est délimité axialement et communique avec des raccords de pression (44, 46) de la machine à engrenages intérieurs (10) par l'intermédiaire des poches de pression (40, 42) situées dans le carter (12). Selon l'invention, une soupape de permutation (60, 62) est montée dans chaque liaison entre les poches de pression (40, 42) et les raccords de pression (44, 46) ou des espaces de déplacement (78, 86), laquelle soupape ouvre ou ferme ladite liaison.
EP21716271.8A 2020-04-14 2021-03-18 Machine à engrenages intérieurs Pending EP4136354A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020110217.8A DE102020110217A1 (de) 2020-04-14 2020-04-14 Innenzahnradmaschine
PCT/EP2021/056926 WO2021209222A1 (fr) 2020-04-14 2021-03-18 Machine à engrenages intérieurs

Publications (1)

Publication Number Publication Date
EP4136354A1 true EP4136354A1 (fr) 2023-02-22

Family

ID=75377708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21716271.8A Pending EP4136354A1 (fr) 2020-04-14 2021-03-18 Machine à engrenages intérieurs

Country Status (5)

Country Link
US (1) US11905956B2 (fr)
EP (1) EP4136354A1 (fr)
CN (1) CN115380162A (fr)
DE (1) DE102020110217A1 (fr)
WO (1) WO2021209222A1 (fr)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB489955A (en) 1937-02-05 1938-08-05 Fluvario Ltd Improvements in or relating to rotary engines
US2420622A (en) 1942-04-15 1947-05-13 Borg Warner Pump with pressure loaded bushing
US5197869A (en) * 1991-03-22 1993-03-30 The Gorman-Rupp Company Rotary gear transfer pump having pressure balancing lubrication, bearing and mounting means
JP2541424Y2 (ja) 1992-04-24 1997-07-16 株式会社 神崎高級工機製作所 車両用油圧伝動装置の油圧制御装置
DE4338875C2 (de) 1993-11-13 2003-11-06 Eckerle Ind Elektronik Gmbh Reversierbare Innenzahnradmaschine (Pumpe oder Motor)
DE9404943U1 (de) 1994-03-23 1994-06-01 Wessel-Hydraulik Gmbh, 26384 Wilhelmshaven Bremsventilanordnung für einen reversierbaren hydraulischen Verbraucher
DE19930910C1 (de) 1999-07-06 2001-01-18 Voith Turbo Kg Innenzahnradpumpe für Reversierbetrieb im geschlossenen hydraulischen Kreislauf
DE102007054808A1 (de) * 2007-11-16 2009-05-20 Robert Bosch Gmbh Pumpenbaugruppe zur synchronen Druckbeaufschlagung von zwei Fluidkreisen
DE102008053318A1 (de) 2008-10-27 2010-04-29 Trw Automotive Gmbh Reversibel betreibbare Zahnradmaschine, sowie Fahrzeuglenksystem und Verfahren zur Steuerung eines Fahrzeuglenksystems
DE102011016309A1 (de) * 2011-04-07 2012-10-11 Robert Bosch Gmbh Innenzahnrad- oder Zahnringpumpe
DE102011100105A1 (de) * 2011-04-30 2012-10-31 Robert Bosch Gmbh Füllstücklose hydrostatischeInnenzahnradmaschine
DE102014103958A1 (de) * 2014-03-21 2015-09-24 Eckerle Industrie-Elektronik Gmbh Motor-Pumpen-Einheit
DE102017106140A1 (de) 2017-03-22 2018-09-27 Voith Patent Gmbh Innenzahnradmaschine
CN111005868A (zh) * 2018-10-05 2020-04-14 株式会社山田制作所 可变容量油泵

Also Published As

Publication number Publication date
CN115380162A (zh) 2022-11-22
WO2021209222A1 (fr) 2021-10-21
DE102020110217A1 (de) 2021-10-14
US11905956B2 (en) 2024-02-20
US20230193899A1 (en) 2023-06-22

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