EP1050680B1 - Joint d'arbre pour machine hydraulique - Google Patents

Joint d'arbre pour machine hydraulique Download PDF

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Publication number
EP1050680B1
EP1050680B1 EP20000109429 EP00109429A EP1050680B1 EP 1050680 B1 EP1050680 B1 EP 1050680B1 EP 20000109429 EP20000109429 EP 20000109429 EP 00109429 A EP00109429 A EP 00109429A EP 1050680 B1 EP1050680 B1 EP 1050680B1
Authority
EP
European Patent Office
Prior art keywords
sealing element
hydraulic machine
machine according
channel
sealing
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.)
Expired - Lifetime
Application number
EP20000109429
Other languages
German (de)
English (en)
Other versions
EP1050680A3 (fr
EP1050680A2 (fr
Inventor
Steven Donders
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.)
Brueninghaus Hydromatik GmbH
Original Assignee
Brueninghaus Hydromatik 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 Brueninghaus Hydromatik GmbH filed Critical Brueninghaus Hydromatik GmbH
Publication of EP1050680A2 publication Critical patent/EP1050680A2/fr
Publication of EP1050680A3 publication Critical patent/EP1050680A3/fr
Application granted granted Critical
Publication of EP1050680B1 publication Critical patent/EP1050680B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F04B1/2014—Details or component parts
    • 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
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • 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
    • F04B1/2014—Details or component parts
    • F04B1/2078—Swash plates
    • F04B1/2085—Bearings for swash plates or driving axles
    • 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
    • F04B53/04—Draining

Definitions

  • the invention relates to a hydraulic machine according to the preamble of claim 1.
  • Hydraulic machine is one Axial piston machine with a drive shaft, by means of a Rolling bearing on a housing wall of the housing of stored by a hydraulic machine and by means of a on the outside of the rolling bearing in a ring joint between the Drive shaft and the housing wall arranged sealing ring is sealed.
  • Hydraulic machine is also a pump device for an internal Forced flushing of the rolling bearing provided.
  • the Pumping device has a on the inside of the Rolling arranged on the conveyor disc, the annular gap the rolling bearing axially opposite through holes having, with respect to the axis of rotation of the shaft in Direction of the rolling bearing divergent extend.
  • the conveyor disc acting in functional operation acts at least partially in the hydraulic operating fluid, e.g. B. Hydraulic oil, located as a centrifugal conveyor ring, the that in the divergently extending through holes located fluid due to the centrifugal force towards the rolling bearing promotes.
  • a return channel is provided, which extends back into the interior of the housing and in which the pumped fluid flow back into the interior can.
  • the first Although sealing element lubricated by the flushing fluid and cooled, but it is also pressure fluctuations in the interior the machine housing exposed, the Pressure fluctuations are essentially due to the rolling bearing propagate unimpeded to the first sealing element. As a result, a pressure difference acts on the first sealing element, extending through the inside of the first sealing element each pending housing internal pressure and the housing surrounding air pressure results. If this pressure difference is a certain permissible value is one desirable good sealing function of the first sealing element not given anymore.
  • the sealing function by a sudden overuse or persistent Overstress be affected. The latter are especially with such first sealing elements considerably, the drive shaft of the machine with a sealing lip surrounded, which with increasing the housing internal pressure against the Lateral surface of the drive shaft is pressed. Unless already due to the high pressure in the interior Basically impairments of the first sealing element arise, then there is the danger of a functional operation increased friction wear on the sealing lip.
  • the document EP 0 836 005 A1 describes a hydraulic pump system with a recovery unit for the leaked equipment (fluid), the Recovery unit with a steam jet pump Suction device comprising, with hydraulic lines is connected to the area of the drive shaft of the Pump system spilled hydraulic fluid again the Supply reservoir of the hydraulic pump.
  • the invention is based on the object at a Hydraulic machine of the type specified in the To improve sealing of the drive shaft.
  • a second sealing element arranged, which the space in a the rolling bearing receiving interior and one between the first sealing element and the second sealing element arranged space separates, with the gap with a drainage line is connected, in which a pressure prevails, which is lower than the pressure in the interior.
  • the second sealing element thus forms a barrier that in advantageous in two respects.
  • the partition forms a barrier against the hydraulic fluid contained in the main room Solid contaminants, especially from abrasion resulting particles, thus, neither in the adjoining room can still reach the sealing surface on the sealing ring can affect.
  • the second sealing element Since the second sealing element the pressure fluctuations of the Interior is still exposed, although with a Leakage to count on the second sealing element, however, passes this leakage is not in the environment of the hydraulic Machine, because it gets out of the gap by one Drained drainage line.
  • the first sealing element of the Pressure fluctuations or exempted from elevated pressures or the pressure fluctuations are reduced, becomes a Leakage avoided on the first sealing element, so that the hydraulic machine is of clean function and also on Places can be placed where the avoidance of Leaks is required.
  • the invention is characterized Design by a simple and inexpensive manufacturable construction, which is also of small size and therefore for all common machine types let realize.
  • the embodiment according to the invention comprises a pressure stage seal with a second sealing element, of the on the inside of him pending hydraulic fluid with a small amount of fluid is passed. With this amount of fluid can it is a leakage quantity or such Fluid quantity, which is a bypass of the second sealing element happens.
  • the second sealing element are more suitable Configurations. It can be z. B. a radial shaft seal, a mechanical seal or a gap or Trade labyrinth seal.
  • the second sealing element passing amount of fluid is through the drainage line drained the space, creating a Lubrication of the first sealing element is ensured and on the other hand passing the second sealing element Fluid causes no increase in pressure in the space.
  • the hydraulic machine 1 preferably has one two-part housing 2 on, with a cup-shaped Housing part that through an end wall 2 a and a Peripheral wall 2b is formed, and with a lid 2c, the on the end wall 2a facing away from the end of the peripheral wall 2b rests and thus at least partially with a hydraulic Fluid-filled housing interior 3 closes and with the Circumferential wall 2b is releasably screwed.
  • a the Housing interior 3 with respect to the peripheral wall 2b axially penetrating drive shaft 5 is in the lid 2c and in the End wall 2a each in at least one rolling bearing 6, 7th rotatably mounted, wherein the end wall 2a in a Through-hole 8 passes through, the present Embodiment by a three-stage stepped bore is formed, in its inner and largest hole stage 8a the rolling bearing 7 and in the outer and smallest Bore stage 8b a sealing element 9 in the form of a sealing ring each matching cross-sectional size is arranged.
  • a Cylinder block 11 stored, the more, on the perimeter distributed, approximately axially extending piston bores 12, in which piston 13 is mounted longitudinally displaceable are the cylinder block 11 in the direction of the end wall Overhang 2a and with these free piston ends on a between the end wall 2a and the cylinder block 11th arranged drive part 14 are hinged, the at each known construction and operation of the so-called formed axial piston rotatable or non-rotatable can be stored.
  • the drive part 14 non-rotatably mounted which is a Axial piston machine optionally enlargeable and reducible throughput volume, in which the Drive part 14 formed by a swash plate 14a, which in a z. B.
  • pivot bearing 15 about a transverse to the drive shaft 5 extending pivot axis 15a is pivotally mounted, wherein the piston 13 by means of sliding shoes 17 at a support them facing inclined sliding surface 18.
  • the cylinder block 11 is applied to a control disk 19 which is supported on the inside of the lid 2c and each other radially opposed control kidneys 21, which in in known manner the passage of an inlet and Outlet channel 22, 23 in the lid 2c respectively associated hydraulic working chambers 24 in the piston bores 12 Taxes.
  • an adjusting device 15 b To set a desired passage volume of Machine 1 is provided an adjusting device 15 b, with the drive part 14 adjustable, here swiveling, and can be detected in the set position.
  • the first sealing element or sealing ring 9 is preferably around a lip ring with a one from one Base body 9a extending axially or obliquely inwardly Sealing lip 9b.
  • a shoulder surface 25 which limits it on the outside.
  • a second sealing element 26 in the form of a barrier or Arranged sealing ring on his the sealing ring. 9 side facing a gap 27 between him and the first sealing ring 9 axially limited.
  • the sealing element 26 is arranged in a middle hole stage 8c, which after is bounded on the outside by a shoulder surface 28 at which the Sealing element 26 abuts.
  • an axial lock provided in the present embodiment is formed by the fact that the sealing ring 9 and the Sealing element 26 in the associated bore stage 8b, 8c with radial stress are pressed.
  • the sealing element 26 by a locking ring, z. B. made of metal or plastic, preferably inside a movement play to the radially adjacent component, here the drive shaft 5 or a firmly seated on her Drive shaft sleeve 5a, has.
  • the movement play forms a throttle 29 and a throttled bypass 30 in the sense a compression stage seal 20, whose function below is still explained.
  • the drainage space 31a may be an area of the associated hydraulic system, in which one of the ambient pressure only slightly different Pressure is present. This can z. B. the suction line of Machine or a feed pump or auxiliary pump 4, the in the present embodiment in the lid 2c is arranged and with an associated pump element the drive shaft 5 is seated and driven by the latter.
  • the drainage space 31 a may also be a tank 33 for the hydraulic fluid of the machine 1 or a associated hydraulic system act.
  • the drainage chamber 31 a through the Suction channel 4a of the feed or auxiliary pump 4 may be formed, with the drainage line 31 as externally extending Hose or pipe 34 or as internally extending Hose or pipe 34a to be formed.
  • the latter can next to the cylinder drum 11 longitudinally through the Housing interior 3 extend and through a Plug-in joint to be connected to the lid 2c.
  • Both lines 34, 34a can with the purpose of injector a correspondingly designed section 4b of Be connected suction channel 4a.
  • the Sealing ring 9 and the sealing element 26 in a special Pick-up ring 35 arranged in a matching Ring recess 36 of the end wall 2a is inserted, the Outside of the end wall 2a is open.
  • a securing element provided, in the present embodiment by a conventional locking ring 37 is formed, which in a Ring groove 38 sits in the Ringaus originallyungswandung and with its inside a receiving ring 35 on the outside defining shoulder surface 39 forms.
  • a Ring recess 41 in the region of the outer edge of Take-up ring 35 is the required clearance for the Circlip 37 created.
  • the receiving ring 35 limited in its installed position with its inside the outer ring 7a of the rolling bearing 7, on its inside by a Shoulder surface 2d of the end wall 2a is limited.
  • the above-described embodiment with the receiving ring 35th allows for a the arrangement of the sealing ring 9 and the Sealing element 26 in an attachment, so that the receiving ring 35 and the sealing elements 9, 26 for a manageable and interchangeable with others the receiving ring 35 form a prefabricated attachment.
  • the drive shaft sleeve 5a is with respect to the carrying them Drive shaft section through a ring seal 42nd sealed.
  • the drainage line 31 can partly in the housing 2 and within run the machine 1 or by an external line 34, z. B. a pipe or hose, be formed.
  • Fig. 1 shows an external line 34 which is connected to a z. B. radially extending drainage channel 44 in the end wall 2a connected.
  • the conduit 34 may be for Tank 33 extend, as it is indicated.
  • the extending from the gap 27 channel 44 is made from a channel portion 44a, which extends to the cylindrical
  • the lateral surface of the receiving ring 35 extends in the Area one in the lateral surface of the receiving ring 35 or in the inner wall of the annular recess 36 arranged annular groove 45, from which a channel section 44b to the line connection extends.
  • a special channel 47 forming a bypass 30 arranged in the end wall 2 a, the rolling bearing 7 and whose bearing bore bypasses and the housing interior 3 with connects the gap 27.
  • a throttle 29 is provided in the channel 47, preferably within a receiving ring 35 extending Channel section 47a.
  • the channel 47 passes through the radial pitch between the receiving ring 35 and the end wall 2a, wherein the throttle 29 in the inside from the receiving ring 35 exiting channel portion 47a is arranged so that they are made from this side or machined or as a separate component in the form of a Nozzle 29a can be used, for. B.
  • the channel 47 is preferably Z-shaped, with the Center section 47b of the Z-shape extends radially and through a radial channel extension 47c is accessible from outside, so that the individual channel sections radially and axially parallel each from an associated outside in the End wall 2a can be drilled.
  • the mouth of the with 47 c designated axially parallel channel portion in the Housing interior 3 is because of a special Bruchkantenverlaufs not shown in Fig. 2.
  • the Channel extension 47c may include a closure member 48, e.g. In Shape of a screw into an internal thread 49 pin or nozzle, with which the channel 47 is optional is lockable or in terms of its cross-sectional size is adjustable.
  • the closure element 48 has at its outer end of a rotary tool-engaging element 51 to it to screw in or out.
  • the channel extension 47c is by a closure element 48th lockable, z. B. by means of a screw plug 52nd
  • the second sealing element 26 is preferably also around a sealing ring, in particular Radial shaft seal, with one extending from a base body 26a to the interior 3a extending tubular sealing lip 26b.
  • such a bypass 30 also by a channel or a bore in the sealing element 26 itself or be formed in its sealing lip 26.
  • the adjustable throttle adjustment will be the Lubricant quantity for the sealing elements 9 and / or 26 regulated.
  • the set lubricant quantity is the same chosen that possibly occurring and in the course of the Operating time may also be increasing leaks on sealing element 9 or 26 no significant effects on the operation of the sealing system have. That as Leakage or through the associated bypass 30 in the Interspace 47 reaching fluid contributes to lubrication and Cooling of the sealing elements 9 and 26 at.
  • the Pressure drop from the housing interior 3 or interior 3a to Interspace 27 and the drainage line 31 is the Lubricant supply to the sealing system ensured.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Claims (12)

  1. Machine hydraulique, en particulier machine à piston, avec un carter (2) dans lequel est monté avec capacité de rotation un arbre d'entraínement (5) qui traverse une paroi de carter (2a) dans un trou de traversée (8) et est monté par un palier à roulement (7) sur la paroi de carter (7), et est en outre étanché par un premier élément d'étanchéité (9) disposé du côté extérieur du palier à roulement (7), dans laquelle est disposé, dans l'espace qui s'étend entre le premier élément d'étanchéité (9) et le palier à roulement (7), un deuxième élément d'étanchéité (26) qui sépare l'espace en un espace intérieur (3a) logeant le palier à roulement (7) et un espace intermédiaire (27) disposé entre le premier élément d'étanchéité (9) et le deuxième élément d'étanchéité (26), et dans laquelle l'espace intermédiaire (27) est relié à un conduit de drainage (31) où règne une pression qui est plus faible que la pression régnant dans l'espace intérieur (3a), un bypass (30) étant formé par un canal (47), caractérisée en ce qu'un élément de fermeture est disposé (48) dans ce canal (47), lequel élément de fermeture peut être réglé entre une position ouvrant le canal (47) et une position le fermant.
  2. Machine hydraulique selon la revendication 1, caractérisée en ce que le premier élément d'étanchéité (9) et/ou le deuxième élément d'étanchéité (26) présentent chacun une lèvre d'étanchéité annulaire (9b, 26b) s'étendant vers l'espace intérieur (3a).
  3. Machine hydraulique selon la revendication 2, caractérisée en ce que le deuxième élément d'étanchéité (26) est un corps annulaire qui présente un bypass étranglé (30) comme passage d'écoulement.
  4. Machine hydraulique selon la revendication 3, caractérisée en ce que le bypass (30) est formé par un canal (47) contournant le trou de traversée (8) au moins dans son segment longitudinal logeant le deuxième élément d'étanchéité (26).
  5. Machine hydraulique selon la revendication 4, caractérisée en ce qu'un dispositif d'étranglement (29) est disposé dans le bypass (30).
  6. Machine hydraulique selon l'une des revendications 3 à 5, caractérisée en ce que le bypass (30) est formé par un canal (47) s'étendant dans le deuxième élément d'étanchéité (26) ou dans la paroi de carter (2a).
  7. Machine hydraulique selon la revendication 6, caractérisée en ce que le canal (47) est accessible de l'extérieur par un segment de canal (47c) débouchant de la paroi de carter (2a).
  8. Machine hydraulique selon la revendication 5, caractérisée en ce qu'au moins le premier élément d'étanchéité (9), de préférence aussi le deuxième élément d'étanchéité (26), sont disposés dans un anneau de logement (35) qui peut être monté sur la paroi de carter (2a).
  9. Machine hydraulique selon la revendication 8, caractérisée en ce que le dispositif d'étranglement (29) est disposé dans l'anneau de logement (35) dans un segment de canal (47a) accessible de l'extérieur.
  10. Machine hydraulique selon l'une quelconque des revendications précédentes, caractérisée en ce que le conduit de drainage (31) est relié à une tuyauterie d'aspiration (4a) de la machine (1) ou d'une pompe auxiliaire (4) ou à un réservoir (33) d'une installation hydraulique associée à la machine (1).
  11. Machine hydraulique selon l'une quelconque des revendications précédentes, caractérisée en ce que le conduit de drainage (31) s'étend à l'intérieur ou à l'extérieur par rapport au carter (2).
  12. Machine hydraulique selon la revendication 11, caractérisée en ce que le conduit de drainage (31) présente un tuyau traversant l'espace intérieur (3) du carter (2) de manière au moins sensiblement parallèle à l'axe.
EP20000109429 1999-05-07 2000-05-03 Joint d'arbre pour machine hydraulique Expired - Lifetime EP1050680B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19921501 1999-05-07
DE1999121501 DE19921501C2 (de) 1999-05-07 1999-05-07 Hydraulische Maschine mit einem außenseitig von einem Wälzlager angeordneten Dichtelement

Publications (3)

Publication Number Publication Date
EP1050680A2 EP1050680A2 (fr) 2000-11-08
EP1050680A3 EP1050680A3 (fr) 2001-03-28
EP1050680B1 true EP1050680B1 (fr) 2005-10-19

Family

ID=7907584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000109429 Expired - Lifetime EP1050680B1 (fr) 1999-05-07 2000-05-03 Joint d'arbre pour machine hydraulique

Country Status (2)

Country Link
EP (1) EP1050680B1 (fr)
DE (2) DE19921501C2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006038073A1 (de) * 2006-08-16 2008-02-21 Robert Bosch Gmbh Kolbenmaschineneinheit mit einer hydrostatischen Kolbenmaschine und einer Hilfspumpe
DE102007020298A1 (de) * 2007-04-20 2008-10-23 Alfred Kärcher Gmbh & Co. Kg Kolbenpumpe für ein Hochdruckreinigungsgerät
DE102010026157A1 (de) * 2010-07-06 2012-01-12 Robert Bosch Gmbh Hydrostatische Maschine, insbesondere Axialkolbenmaschine
DE102010031154B4 (de) * 2010-07-09 2018-05-17 Continental Automotive Gmbh Pumpe zur Förderung eines Fluids, umfassend eine erste und eine zweite in Kontakt stehende Antriebswellendichtung, die einen variabel einstellbaren Drosselkanal zwischen der ersten und zweiten Antriebswellendichtung aufweist
DE102013211987A1 (de) * 2013-06-25 2015-01-22 Robert Bosch Gmbh Dichtung für Axialkolbenmaschine mit Vibrationsdämpfung
DE102013215680A1 (de) * 2013-08-08 2015-02-12 Robert Bosch Gmbh Schrägscheibenmaschine
DE102014212180A1 (de) * 2014-06-25 2015-12-31 Robert Bosch Gmbh Schrägscheibenmaschine
DE102014212183A1 (de) * 2014-06-25 2015-12-31 Robert Bosch Gmbh Schrägscheibenmaschine
DE102014212201A1 (de) 2014-06-25 2015-12-31 Robert Bosch Gmbh Hydrostatische Maschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02283870A (ja) * 1989-04-05 1990-11-21 Zahnradfab Friedrichshafen Ag 軸方向ピストンポンプ
US5199718A (en) * 1992-04-13 1993-04-06 Vickers, Incorporated Rotary machine shaft seal
EP0661450A1 (fr) * 1993-12-06 1995-07-05 Vickers Incorporated Dispositif transformateur d'énergie d'un fluide à mouvement rotatoire avec un joint d'arbre
DE19613609C2 (de) * 1996-04-04 2000-02-17 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine mit internem Spülkreislauf
US5984315A (en) * 1996-10-09 1999-11-16 Denison Hydraulics Inc. Reclamation system for a hydraulic pump system

Also Published As

Publication number Publication date
DE19921501C2 (de) 2003-05-08
EP1050680A3 (fr) 2001-03-28
DE50011350D1 (de) 2006-03-02
DE19921501A1 (de) 2000-11-16
EP1050680A2 (fr) 2000-11-08

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