EP1050680A2 - Wellendichtung für hydraulische Maschine - Google Patents
Wellendichtung für hydraulische Maschine Download PDFInfo
- Publication number
- EP1050680A2 EP1050680A2 EP00109429A EP00109429A EP1050680A2 EP 1050680 A2 EP1050680 A2 EP 1050680A2 EP 00109429 A EP00109429 A EP 00109429A EP 00109429 A EP00109429 A EP 00109429A EP 1050680 A2 EP1050680 A2 EP 1050680A2
- 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.)
- Granted
Links
Images
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 a Axial piston machine with a drive shaft, which by means of a Rolling bearing on a housing wall of the housing stored hydraulic machine and by means of a outside of the rolling bearing in an annular 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 roller bearing is provided.
- the Pump device has one on the inside of the Roller arranged on the conveyor disc, the annular gap of the rolling bearing axially opposite through holes has, which with respect to the axis of rotation of the shaft in Extend divergent direction towards the rolling bearing.
- acts on the conveyor disc which functions during operation at least partially in the hydraulic operating fluid, e.g. B. Hydraulic oil, like a centrifugal pump, is located that in the diverging through holes located fluid due to the centrifugal force in the direction of promotes the rolling bearing.
- a return channel is provided on the side of the roller bearing, which extends back into the interior of the housing and in which the delivered fluid flows back into the interior can.
- the first Sealing element lubricated by the flushing fluid and cooled, but there is also pressure fluctuations in the interior exposed to the machine housing, the Pressure fluctuations are essentially caused by the rolling bearing propagate undiminished to the first sealing element.
- a pressure difference acts on the first sealing element, which is due to the inside of the first sealing element pending internal pressure and the housing surrounding air pressure results. If this pressure difference is one exceeds a certain permissible value is a Desirably good sealing function of the first sealing element no longer exist.
- the sealing function can be performed by a sudden overuse or persistent Overuse can be affected. The latter are especially with such first sealing elements, the drive shaft of the machine with a sealing lip surrounded with increasing internal pressure against the Shell surface of the drive shaft is pressed. Unless already because of the high pressure in the interior basically impairments of the first sealing element arise, there is a risk of increased frictional wear on the sealing lip.
- the invention has for its object in a hydraulic machine of the type specified at the outset Improve sealing of the drive shaft.
- a second sealing element is arranged, the space in one the rolling bearing receiving interior and one between the first sealing element and the second sealing element arranged space separates, the space 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 is beneficial in two ways.
- the partition wall forms a barrier against the hydraulic fluid contained in the main room Solid contamination, 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 withstands the pressure fluctuations of the Interior is still exposed, is with a Leakage at the second sealing element can be expected, however this leakage does not affect the environment of the hydraulic Machine, because it is separated from the space by a Drainage line discharged. Since in the invention Design the first sealing element of the Pressure fluctuations or from increased pressures is exempt or the pressure fluctuations are reduced, a Leakage at the first sealing element avoided, so that the hydraulic machine is of clean function and also on Can be placed in locations where the avoidance of Leakage is required.
- the invention is distinguished Design through a simple and inexpensive manufacturable construction, which is also of small size and therefore with all common machine types can be realized.
- the configuration according to the invention comprises a pressure stage seal with a second sealing element that from the hydraulic fluid on the inside of it with a small amount of fluid is passed. With this amount of fluid it is a leakage amount or one Amount of fluid that bypasses the second sealing element happens.
- the second sealing element Configurations can e.g. B. a radial shaft seal, a mechanical seal or a gap or Act labyrinth seal.
- the the second sealing element passing amount of fluid is expelled through the drainage line drained the space, which on the one hand Lubrication of the first sealing element is guaranteed and on the other hand that which passes through the second sealing element Fluid causes no pressure increase 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 2a and a Circumferential wall 2b is formed, and with a lid 2c, the abuts the end of the peripheral wall 2b facing away from the end wall 2a and thus one at least partially with a hydraulic one Fluid-filled housing interior 3 closes and with the Circumferential wall 2b is screwed detachably.
- a den Housing interior 3 axially with respect to the peripheral wall 2b penetrating drive shaft 5 is in the cover 2c and in the End wall 2a in at least one rolling bearing 6, 7 rotatably supported, the end wall 2a in one Through hole 8 penetrates the present Embodiment through a three-stage stepped bore is formed, in the inner and largest bore step 8a the roller bearing 7 and in its outer and smallest Bore step 8b a sealing element 9 in the form of a sealing ring each appropriate cross-sectional size is arranged.
- pivot bearing 15 around a transverse to the drive shaft 5 extending pivot axis 15a is pivotally mounted, wherein the pistons 13 on one another by means of sliding shoes 17 support them facing inclined sliding surface 18.
- the cylinder block 11 on a control disc 19 At the end of the housing interior 3 facing away from the drive part 14 is the cylinder block 11 on a control disc 19, the is supported on the inside of the lid 2c and each other has radially opposite control kidneys 21 which in known the passage of an inlet and Outlet channel 22, 23 in the lid 2c to the respective associated hydraulic working chambers 24 in the piston bores 12 Taxes.
- an adjustment device 15b which the drive part 14 is adjustable, here pivotable, and can be determined in the respectively set position.
- the first sealing element or sealing ring 9 is preferably around a lip ring with a different from one Base body 9a extending axially or obliquely inwards Sealing lip 9b. To secure the sealing ring 9 against axial migration outwards, it lies on a shoulder surface 25, which limits it on the outside.
- a second sealing element 26 in the form of a locking or Sealing ring arranged on its the sealing ring 9 facing side a space 27 between it and the first sealing ring 9 axially limited.
- the sealing element 26 is arranged in a middle bore step 8c, which after is delimited on the outside by a shoulder surface 28 on which the Sealing element 26 rests.
- an axial lock provided in the present embodiment is formed in that the sealing ring 9 and that Sealing element 26 in the associated bore step 8b, 8c radial tension are pressed.
- the sealing element 26 by a locking ring, e.g. B. made of metal or plastic, which is preferably inside a play of movement to the radially adjacent component, here the drive shaft 5 or one firmly seated on it Drive shaft sleeve 5a.
- the movement game forms a throttle 29 or a throttled bypass 30 in the sense a compression seal 20, the function below is still explained.
- the drainage space 31a can be an area of the associated hydraulic system, in which one differs only slightly from the ambient pressure There is pressure.
- This can e.g. B. the suction line 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 sits and is driven by the latter.
- the drainage space 31a can also be a tank 33 for the hydraulic fluid of the machine 1 or one associated hydraulic system.
- the Sealing ring 9 and the sealing element 26 in a special Receiving ring 35 arranged in a matching Ring recess 36 of the end wall 2a is used, which for Outside of the end wall 2a is open.
- a securing element provided that by in the present embodiment a conventional locking ring 37 is formed, which in a Ring inner groove 38 sits in the ring recess wall and with its inside a the receiving ring 35 outside defining shoulder surface 39 forms.
- a Ring recess 41 in the area of the outer edge of the Recording ring 35 is the required space for the Circlip 37 created.
- the receiving ring 35 limits in its installed position with the inside of the outer ring 7a of the rolling bearing 7, which on its inside by a Shoulder surface 2d of the end wall 2a is limited.
- the above-described configuration with the receiving ring 35 allows on the one hand the arrangement of the sealing ring 9 and Sealing element 26 in an attachment, so that the receiving ring 35 and the sealing elements 9, 26 on the one hand are easy to use and interchangeable with the receiving ring 35 form a prefabricated attachment.
- the drive shaft sleeve 5a is in relation to the one that supports it Drive shaft section through an annular seal 42 sealed.
- a sealing ring 43 for. B. a O-ring, very advantageous, the drive shaft section 5b sealingly surrounds and in an inner ring groove 44 in the Drive shaft sleeve 5a sits.
- the drainage line 31 can partly in the housing 2 and inside of the machine 1 or through an external line 34, e.g. B. a pipe or hose can be formed.
- Fig. 1 shows an external line 34 connected to a z. B. radial running drainage channel 44 in the end wall 2a connected.
- the line 34 to the Extend tank 33 as indicated.
- the channel 44 extending from the intermediate space 27 exists from a channel section 44a, which extends to the cylindrical Shell surface of the receiving ring 35 extends in the Area one in the lateral surface of the receiving ring 35 or arranged in the inner wall of the annular recess 36 annular groove 45, of which there is a channel section 44b for line connection extends.
- Ring seals 46 are in themselves known manner each formed by a sealing ring, the in an annular groove in the inner wall of the annular recess 36 or in the lateral surface of the receiving ring (not shown) sits.
- a special channel 47 forming a bypass 30 arranged in the end wall 2a, which the roller bearing 7 or bypasses the bearing bore and the housing interior 3 with connects the space 27.
- This alternative Design can be exclusive or in addition to above-described bypass design on the second Sealing element 26 may be present. Even with the variant a throttle 29 is provided in the channel 47, preferably within a running in the receiving ring 35 Channel section 47a.
- Channel 47 preferably penetrates the radial dividing line between the receiving ring 35 and the end wall 2a, the throttle 29 in the inside channel section 47a emerging from the receiving ring 35 is arranged so that it is made from this side or processed or as a separate component in the form of a Nozzle 29a can be used, e.g. B. by a Screw connection or an adhesive connection.
- the channel 47 is preferably Z-shaped, the Central section 47b of the Z-shape runs radially and through a radial channel extension 47c is accessible from the outside, so that the individual channel sections are radial and axially parallel in each case from an associated outside End wall 2a can be drilled.
- the mouth of the with 47c denoted axially parallel channel section in the Housing interior 3 is because of a special one Breakline course not shown in Fig. 2.
- the Channel extension 47c may include a closure member 48, e.g. B. in Form of a pin that can be screwed into an internal thread 49 or nozzle can be formed, with which the channel 47 optionally is lockable or in terms of its cross-sectional size is adjustable.
- the closure element 48 has on its outer end of a lathe tool engaging member 51 to it to screw in or out.
- the channel extension 47c is preferably by a closure element 48 lockable, e.g. 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 ring, with one from a base body 26a to the interior 3a extending tubular sealing lip 26b.
- Sealing element 9 To increase the operational safety and service life of the Sealing element 9 are permissible values of the pressure difference on Sealing element 9 required. It is also used to increase the Operational safety and service life of the sealing elements 9 and / or 26 an adequate supply of lubricant required. It ensures lubrication and cooling the sealing lips of the sealing element or elements 9 and / or 26. Zu for this purpose the hydraulic fluid to be sealed by means of the bypass 30, in which a throttle 29 is located, past the sealing element 26 into the intermediate space 27 headed. This can be a leak or a leak act targeted continuous flow rate that the Bypass 30 in the above-described embodiments enables.
- Such a bypass 30 can also be used for exemplary embodiments a channel or a bore in the sealing element 26 itself or be formed in its sealing lip 26.
- the throttle set-up is preferably adjustable Lubricant quantity for the sealing elements 9 and / or 26 regulated.
- the set amount of lubricant is like this chosen that possibly occurring and in the course of Operating time may also have increasing leaks no significant effects on the sealing element 9 or 26 on the operation of the sealing system. That as Leakage or through the associated bypass 30 in the Intermediate space 47 fluid contributes to lubrication and Cooling of the sealing elements 9 and 26.
- the Pressure drop from the housing interior 3 or interior 3a to Interspace 27 or the drainage line 31 is the Lubricant supply to the sealing system ensured.
- the pressure in the Drainage line 31 or in the space 27 via a Injector can be lowered, the z. B. in the field of Suction line of the machine or the auxiliary pump 4, in particular is arranged in the area of the suction connection.
- the Drain opening 53 in the space 27 of the sealing system can be arranged so that the space is almost is completely filled with the hydraulic fluid.
- the compression seal 20 also design as a multi-stage compression seal.
- the entire pressure difference inside the machine becomes Environment degraded in several stages.
- the mode of action of individual stages is analogous to that described above single stage sealing system. That in the immediate vicinity of Surrounding sealing element, here sealing element 9, takes on the actual function of complete, dust-dry waterproofing. Only the one immediately before this Gasket lying gap 27 is beyond that described Drainage line 31 with a region of low pressure Machine 1 or an associated system connected. All further seals each run over one matched bypass 30.
- the multi-stage seal Compression seal self-venting.
Landscapes
- 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)
Abstract
Description
- Fig. 1
- eine erfindungsgemäße hydraulische Maschine in Form einer Axialkolbenmaschine im axialen Schnitt;
- Fig. 2
- die in Fig. 1 mit X gekennzeichneter Einzelheit in vergrößerter Darstellung und
- Fig. 3
- einen der Fig. 2 entsprechenden Teilschnitt der Axialkolbenmaschine in abgewandelter Ausgestaltung.
Claims (14)
- Hydraulische Maschine (1), insbesondere Kolbenmaschine, mit einem Gehäuse (2), in dem eine Triebwelle (5) drehbar gelagert ist, die eine Gehäusewand (2a) in einem Durchführungsloch (8) durchsetzt und durch ein Wälzlager (7) an der Gehäusewand (2a) gelagert sowie durch ein außenseitig vom Wälzlager (7) angeordnetes erstes Dichtelement (9) abgedichtet ist,
dadurch gekennzeichnet,
daß in dem sich zwischen dem ersten Dichtelement (9) und dem Wälzlager (7) erstreckenden Raum ein zweites Dichtelement (26) angeordnet ist, das den Raum in einen das Wälzlager (7) aufnehmenden Innenraum (3a) und einen zwischen dem ersten Dichtelement (9) und dem zweiten Dichtelement (26) angeordneten Zwischenraum (27) trennt, und daß der Zwischenraum (27) mit einer Drainageleitung (31) verbunden ist, in der ein Druck herrscht, der niedriger ist als der Druck im Innenraum (3a). - Hydraulische Maschine nach Anspruch 1,
dadurch gekennzeichnet,
daß das erste Dichtelement (9) und/oder das zweite Dichtelement (26) jeweils eine sich zum Innenraum (3a) hin erstreckende ringförmige Dichtlippe (9b, 26b) aufweist. - Hydraulische Maschine nach Anspruch 2,
dadurch gekennzeichnet,
daß das zweite Dichtelement (26) ein Ringkörper ist, der einen gedrosselten Bypass (30) als Strömungsdurchgang aufweist. - Hydraulische Maschine nach Anspruch 3,
dadurch gekennzeichnet,
daß der Bypass (30) durch einen Kanal (47) oder durch ein Bewegungsspiel am Außen- oder Innenumfang des Dichtelements (26) gebildet ist. - Hydraulische Maschine nach Anspruch 3 oder 4,
dadurch gekennzeichnet,
daß der Bypass (30) durch einen das Durchführungsloch (8) wenigstens in seinem das zweite Dichtelement (26) aufnehmenden Längsabschnitt umgehenden Kanal (47) gebildet ist. - Hydraulische Maschine nach Anspruch 5,
dadurch gekennzeichnet,
daß in dem Bypass (30) eine Drossel (29) angeordnet ist. - Hydraulische Maschine nach einem der Ansprüche 3 bis 6,
dadurch gekennzeichnet,
daß der Bypass (30) durch einen im zweiten Dichtelement (26) oder in der Gehäusewand (2a) verlaufenden Kanal (47) gebildet ist. - Hydraulische Maschine nach Anspruch 7,
dadurch gekennzeichnet,
daß der Kanal (47) durch einen aus der Gehäusewand (2a) ausmündenden Kanalabschnitt (47c) von außen zugänglich ist. - Hydraulische Maschine nach Anspruch 8,
dadurch gekennzeichnet,
daß in dem Kanal (47) ein Verschlußelement (48) angeordnet ist, das zwischen einer den Kanal (47) öffnenden und schließenden Stellung verstellbar ist. - Hydraulische Maschine nach Anspruch 6,
dadurch gekennzeichnet,
daß wenigstens das erste Dichtelement (9), vorzugsweise auch das zweite Dichtelement (26), in einem Aufnahmering (35) angeordnet sind, der an die Gehäusewand (2a) montierbar ist. - Hydraulische Maschine nach Anspruch 10,
dadurch gekennzeichnet,
daß die Drossel (29) in einem von außen zugänglichen Kanalabschnitt (47a) im Aufnahmering (35) angeordnet ist. - Hydraulische Maschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet,
daß die Drainageleitung (31) mit einer Saugleitung (4a) der Maschine (1) oder einer Hilfspumpe (4) oder mit einem Tank (33) einer der Maschine (1) zugehörigen hydraulischen Anlage verbunden ist. - Hydraulische Maschine nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet,
daß die Drainageleitung (31) bezüglich des Gehäuses (2) intern oder extern verläuft. - Hydraulische Maschine nach Anspruch 13,
dadurch gekennzeichnet,
daß die Drainageleitung (31) ein den Innenraum (3) des Gehäuses (2) zumindest annähernd achsparallel durchsetzendes Leitungsrohr aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999121501 DE19921501C2 (de) | 1999-05-07 | 1999-05-07 | Hydraulische Maschine mit einem außenseitig von einem Wälzlager angeordneten Dichtelement |
DE19921501 | 1999-05-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1050680A2 true EP1050680A2 (de) | 2000-11-08 |
EP1050680A3 EP1050680A3 (de) | 2001-03-28 |
EP1050680B1 EP1050680B1 (de) | 2005-10-19 |
Family
ID=7907584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20000109429 Expired - Lifetime EP1050680B1 (de) | 1999-05-07 | 2000-05-03 | Wellendichtung für hydraulische Maschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1050680B1 (de) |
DE (2) | DE19921501C2 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012003922A3 (de) * | 2010-07-06 | 2012-04-12 | Robert Bosch Gmbh | Hydrostatische maschine, insbesondere axialkolbenmaschine |
WO2014206714A1 (de) * | 2013-06-25 | 2014-12-31 | Robert Bosch Gmbh | Dichtung für axialkolbenmaschine mit vibrationsdämpfung |
WO2015018583A1 (de) * | 2013-08-08 | 2015-02-12 | Robert Bosch Gmbh | Schrägscheibenmaschine als axialkolbenpumpe und/oder axialkolbenmotor |
WO2015197403A1 (de) * | 2014-06-25 | 2015-12-30 | Robert Bosch Gmbh | Schrägscheibenmaschine |
WO2015197402A1 (de) * | 2014-06-25 | 2015-12-30 | Robert Bosch Gmbh | Schrägscheibenmaschine |
DE102014212201A1 (de) | 2014-06-25 | 2015-12-31 | Robert Bosch Gmbh | Hydrostatische Maschine |
Families Citing this family (3)
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 |
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 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19613609A1 (de) | 1996-04-04 | 1997-10-09 | Brueninghaus Hydromatik Gmbh | Axialkolbenmaschine mit internem Spülkreislauf |
Family Cites Families (4)
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 |
JPH07208327A (ja) * | 1993-12-06 | 1995-08-08 | Vickers Inc | 軸シールを備えた回転式流体圧力エネルギー変換装置 |
US5984315A (en) * | 1996-10-09 | 1999-11-16 | Denison Hydraulics Inc. | Reclamation system for a hydraulic pump system |
-
1999
- 1999-05-07 DE DE1999121501 patent/DE19921501C2/de not_active Expired - Fee Related
-
2000
- 2000-05-03 DE DE50011350T patent/DE50011350D1/de not_active Expired - Lifetime
- 2000-05-03 EP EP20000109429 patent/EP1050680B1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19613609A1 (de) | 1996-04-04 | 1997-10-09 | Brueninghaus Hydromatik Gmbh | Axialkolbenmaschine mit internem Spülkreislauf |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012003922A3 (de) * | 2010-07-06 | 2012-04-12 | Robert Bosch Gmbh | Hydrostatische maschine, insbesondere axialkolbenmaschine |
WO2014206714A1 (de) * | 2013-06-25 | 2014-12-31 | Robert Bosch Gmbh | Dichtung für axialkolbenmaschine mit vibrationsdämpfung |
WO2015018583A1 (de) * | 2013-08-08 | 2015-02-12 | Robert Bosch Gmbh | Schrägscheibenmaschine als axialkolbenpumpe und/oder axialkolbenmotor |
WO2015197403A1 (de) * | 2014-06-25 | 2015-12-30 | Robert Bosch Gmbh | Schrägscheibenmaschine |
WO2015197402A1 (de) * | 2014-06-25 | 2015-12-30 | Robert Bosch Gmbh | Schrägscheibenmaschine |
DE102014212201A1 (de) | 2014-06-25 | 2015-12-31 | Robert Bosch Gmbh | Hydrostatische Maschine |
Also Published As
Publication number | Publication date |
---|---|
EP1050680B1 (de) | 2005-10-19 |
DE19921501C2 (de) | 2003-05-08 |
EP1050680A3 (de) | 2001-03-28 |
DE50011350D1 (de) | 2006-03-02 |
DE19921501A1 (de) | 2000-11-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0245791B1 (de) | Vorrichtung zur relativen Drehlagenänderung zweier in Antriebsverbindung stehender Wellen, insbesondere zwischen in einem Maschinengehäuse einer Brennkraftmaschine gelagerten Kurbelwelle und Nockenwelle | |
DE2848208C2 (de) | Vorgesteuertes Druckbegrenzungsventil mit Einspeisefunktion | |
EP1477636A2 (de) | Nockenwellenversteller für Verbrennungskraftmaschinen | |
DE60027233T2 (de) | Einrichtung zum Bremsen eines Rotors gegenüber einem Stator | |
DE19921501C2 (de) | Hydraulische Maschine mit einem außenseitig von einem Wälzlager angeordneten Dichtelement | |
DE60300051T2 (de) | Wellendichtung | |
DE3516747C2 (de) | Steuereinrichtung für ein hydrostatisches Getriebe | |
DE3719354C2 (de) | ||
DE3145856A1 (de) | Uebertragungsvorrichtung | |
DE10333564B4 (de) | Öldichtungsanordnung | |
DE3321362A1 (de) | Kolben-zylinder-anordnung fuer hydraulische anlagen, insbesondere fuer kraftfahrzeuge | |
DE69318674T2 (de) | Vakuumpumpe mit einem ölgeregelten Einlass-Absperrventil | |
DE3926354C2 (de) | ||
EP1565652B1 (de) | Anschlussblock für eine hydrostatische kolbenmaschine | |
DE3117743C2 (de) | Ölpumpe | |
DE2137537A1 (de) | Drehende Flüssigkeitseinrichtung mit Drucksteuerung | |
DE3444850C1 (de) | Anordnung einer Einrichtung zur Druchfuehrung eines Druckmediums von einem feststehenden Gehaeuse zu einem drehbaren Bauteil | |
DE3490354T (de) | Dichtungseinrichtung für eine Hochdruck-Axialkolbenpumpe | |
DE1503309A1 (de) | Zahnradmotor | |
DE19902518C2 (de) | Hydraulische Maschine, insbesondere Kolbenmaschine, mit einem Gehäuse und einer darin angeordneten Trennwand | |
DE69820934T2 (de) | Hydraulische Servoeinrichtung | |
DE2833178C2 (de) | Hydraulisches Tandem-Bremsdruckmindererventil | |
DE2855566C3 (de) | Hydrostatische Arbeitsmaschine | |
DE1675495A1 (de) | UEberdruckventil | |
DE2333613A1 (de) | Oeldichtungseinrichtung fuer den rotor einer rotationskolben-brennkraftmaschine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB IT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
RIC1 | Information provided on ipc code assigned before grant |
Free format text: 7F 04B 1/12 A, 7F 04B 1/20 B, 7F 04B 53/04 B |
|
17P | Request for examination filed |
Effective date: 20010503 |
|
AKX | Designation fees paid |
Free format text: DE FR GB IT SE |
|
17Q | First examination report despatched |
Effective date: 20031027 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT SE |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
REF | Corresponds to: |
Ref document number: 50011350 Country of ref document: DE Date of ref document: 20060302 Kind code of ref document: P |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20060720 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20130522 Year of fee payment: 14 Ref country code: SE Payment date: 20130521 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20130524 Year of fee payment: 14 Ref country code: FR Payment date: 20130604 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20140724 Year of fee payment: 15 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20140503 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140504 |
|
REG | Reference to a national code |
Ref country code: SE Ref legal event code: EUG |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20150130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140503 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140602 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140503 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 50011350 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20151201 |