WO1995014175A1 - Ölkühlung im arbeitskreislauf einer baumaschine, insebsondere eines hydraulikbaggers - Google Patents
Ölkühlung im arbeitskreislauf einer baumaschine, insebsondere eines hydraulikbaggers Download PDFInfo
- Publication number
- WO1995014175A1 WO1995014175A1 PCT/EP1993/003235 EP9303235W WO9514175A1 WO 1995014175 A1 WO1995014175 A1 WO 1995014175A1 EP 9303235 W EP9303235 W EP 9303235W WO 9514175 A1 WO9514175 A1 WO 9514175A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic oil
- oil
- hydraulic
- pump
- cooling
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
Definitions
- Oil cooling in the working cycle of a construction machine especially one
- the invention relates to a method for cooling the hydraulic oil present in the working circuit of a construction machine, in particular a hydraulic excavator, in that the hydraulic oil is at least partially passed over an oil cooler and then flows into a hydraulic oil tank .
- the object of the invention is to bring about an optimization of the efficiency of the hydraulic oil cooler in order in this way to ensure in any case that the temperature given in the collecting container cannot reach critical values.
- the cooling surface of the oil cooler should be reduced.
- This goal is achieved according to the invention in that the hydraulic oil flowing back from the work area or work areas, in particular the working cylinders, and having a high temperature level, is temporarily stored before it enters the hydraulic oil tank, ie is spatially separated from the oil in the hydraulic oil tank, and is sucked in from here via a pump is that supplies the hydraulic oil to the high temperature level having the oil ⁇ cooler before it flows back at a correspondingly lower temperature into the hydraulic oil tank, and is mixed there with the existing walls a ⁇ res temperature level having hydraulic oil.
- the pump sucks hydraulic oil from the hydraulic oil tank, if necessary in the bypass, as soon as the oil quantity in the intermediate store falls below a predetermined filling quantity or a predetermined filling level. This measure prevents the intake of false air.
- the pump sucks automatically when exceeding the load capacity or the filling level again at the hotter hydraulic oil from the intermediate storage.
- a device for cooling the hydraulic oil present in the working circuit of a construction machine is characterized in that a further container in the form of an intermediate storage device is provided in the region of the hydraulic oil container, the container, according to a further concept of the invention, forming part of the hydraulic oil container. Accordingly, separate and space-consuming components are unnecessary, especially since the total oil quantity does not change, but is only provided at different locations on the hydraulic oil tank.
- the hot hydraulic oil provided in the intermediate store is supplied to the oil cooler via a separate suction pump designed as a cooling oil pump, this suction pump automatically drawing oil from the hydraulic oil tank if the filling quantity or filling level in the intermediate storage is too low, if necessary via a bypass.
- At least one measuring device is preferably provided in the area of the intermediate store, which cooperates with a corresponding switching device for deflecting the oil flows from the intermediate store or the hydraulic oil tank. If, however, no bypass line be employed, as can arranged in the hydraulic oil tank container that are on the bottom side provided in the oil of the hydraulic oil ⁇ container protrudes with at least one opening to the chamber of the hydraulic oil tank through which the suction pump is too low, the hot oil in the intermediate storage colder oil can suck from the hydraulic oil tank. In this way, the intake of false air or the creation of a vacuum in the buffer can be prevented in a simple manner.
- the inlet temperature difference of the oil cooler can be approximately 10 K larger than could be achieved by the previous measures.
- the cooler area can be reduced by up to 40%, depending on the design of the construction machine, which results in a not inconsiderable cost saving through reduced coolers and a single suction system for pumps.
- the single figure shows a schematic diagram in top view of the method and object features of the invention.
- a partial area of the working hydraulics 1 is shown, which in this example is formed by a plurality of working cylinders 2, 3, 4, 5.
- the hydraulic oil is fed into the area of the working cylinders 2, 3, 4, 5 via the only indicated supply lines 6, 7, 8, 9 and discharged again via the discharge lines 10, 11, 12, 13.
- the discharge lines 10, 11, 12, 13 become a collective discharge line
- the intermediate store 15 forms a partial area of a central hydraulic oil tank 16 and is equipped with elongated filter cartridges 17, 18. Further return lines from other areas of the hydraulic system (not shown in further detail) are indicated by the lines 19 and 20, which, however, do not bring the hydraulic oil flowing in, respectively, into the intermediate store 15 but directly into the sump of the hydraulic oil tank 16 via further filter elements 21.
- the hydraulic oil coming from the working hydraulics 1 into the intermediate store 15 is fed via a cooling oil pump 22 through the line 23 sucked in and fed to a downstream oil cooler 24.
- the oil cooled here is now fed via a further line 25 through the filter 21 to the sump of the hydraulic oil tank 16.
- the cooling oil pump 22 sucks continuously in accordance with their originallylei ⁇ stung oil from the buffer memory 15 and supplies it through the cooler 24 to the sump of the hydraulic oil tank 16 to. If the intended filling level should not be reached due to the non-constant use of the working hydraulics or when starting the construction machine, oil is sucked directly out of the sump of the hydraulic oil tank 16, for example through openings (not shown) present in the lower region of the intermediate store 15. Thus, the cooling oil pump 22 can not suck in the wrong air, but is constantly supplied with oil.
- the filling level in the buffer store 15 has again reached its predetermined value.
- the figure also shows suction lines 29, 30, 31, 32 which lead on the one hand to main working pumps 33, 34 and on the other hand to a pilot pump 35 and a swivel pump 36, which in turn interact with consumers (not shown).
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4232542A DE4232542C1 (de) | 1993-11-19 | 1992-09-29 | Verfahren und Einrichtung zur Kühlung des im Arbeitskreislauf einer Baumaschine, insbesondere eines Hydraulikbaggers, vorhandenen Hydrauliköles |
US08/648,053 US5709085A (en) | 1993-11-19 | 1993-11-19 | Method of cooling the hydraulic fluid in the working circuit of a construction machine, in particular a hydraulic excavator |
EP94901819A EP0728263B1 (de) | 1993-11-19 | 1993-11-19 | Ölkühlung im arbeitskreislauf einer baumaschine, insbesondere eines hydraulikbaggers |
DE59308483T DE59308483D1 (de) | 1993-11-19 | 1993-11-19 | Ölkühlung im arbeitskreislauf einer baumaschine, insbesondere eines hydraulikbaggers |
JP7514169A JPH09505131A (ja) | 1993-11-19 | 1993-11-19 | 建設機械、特に油圧式掘削機の作業回路内の油圧オイルを冷却する方法 |
PCT/EP1993/003235 WO1995014175A1 (de) | 1993-11-19 | 1993-11-19 | Ölkühlung im arbeitskreislauf einer baumaschine, insebsondere eines hydraulikbaggers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1993/003235 WO1995014175A1 (de) | 1993-11-19 | 1993-11-19 | Ölkühlung im arbeitskreislauf einer baumaschine, insebsondere eines hydraulikbaggers |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995014175A1 true WO1995014175A1 (de) | 1995-05-26 |
Family
ID=8165793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1993/003235 WO1995014175A1 (de) | 1993-11-19 | 1993-11-19 | Ölkühlung im arbeitskreislauf einer baumaschine, insebsondere eines hydraulikbaggers |
Country Status (5)
Country | Link |
---|---|
US (1) | US5709085A (de) |
EP (1) | EP0728263B1 (de) |
JP (1) | JPH09505131A (de) |
DE (2) | DE4232542C1 (de) |
WO (1) | WO1995014175A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4176967B2 (ja) * | 2001-02-13 | 2008-11-05 | 株式会社前川製作所 | 液圧駆動システム |
EP1888924A4 (de) * | 2005-01-28 | 2012-05-09 | Titan Res And Innovations Pty Ltd | Hydraulikfluidkühlvorrichtung und -verfahren |
DE102005043110B4 (de) * | 2005-09-10 | 2010-07-29 | Terex Gmbh | Verfahren und Einrichtung zur Regelung der Temperatur von Hydrauliköl |
US20110139270A1 (en) * | 2009-12-11 | 2011-06-16 | Veilleux Jr Leo J | Thermal switched cooling orifice for actuation systems |
WO2013064564A1 (en) | 2011-11-01 | 2013-05-10 | Nadiro A/S | A cooled hydraulic system |
US9518594B1 (en) * | 2012-04-30 | 2016-12-13 | The Boeing Company | Hydraulic fluid heat dissipation control assembly and method |
US10030676B2 (en) | 2014-04-23 | 2018-07-24 | Hyster—Yale Group, Inc. | Hydraulic fluid supply apparatus and methods |
EP3306113A4 (de) * | 2015-05-26 | 2019-01-09 | Hitachi Construction Machinery Co., Ltd. | Baumaschine mit vorheizaggregat und verfahren zur vorwärmung dieser maschine |
CN106015188B (zh) * | 2016-06-08 | 2018-05-01 | 太原理工大学 | 一种液压油自动散热控制系统 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1396778A (en) * | 1972-03-28 | 1975-06-04 | Af Hydraulics | Fluid supply systems |
US3960174A (en) * | 1974-09-03 | 1976-06-01 | Caterpillar Tractor Co. | Hydraulic circuit with dual tank system and method for using the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3222865A (en) * | 1964-11-20 | 1965-12-14 | Case Co J I | Hydraulic apparatus and method |
US3976124A (en) * | 1974-11-21 | 1976-08-24 | Pettibone Corporation | Cooling-controlled tank for hydraulic fluid |
US4220015A (en) * | 1979-01-16 | 1980-09-02 | Johansing P G Jr | Hydraulic fluid cooling system |
SE8903739D0 (sv) * | 1989-11-08 | 1989-11-08 | Haakan Ingvast | Metod och anordning i en hydraulanlaeggning |
US5109672A (en) * | 1990-01-16 | 1992-05-05 | The Boeing Company | Method and apparatus for cooling and replenishing aircraft hydraulic actuators |
-
1992
- 1992-09-29 DE DE4232542A patent/DE4232542C1/de not_active Expired - Lifetime
-
1993
- 1993-11-19 DE DE59308483T patent/DE59308483D1/de not_active Expired - Lifetime
- 1993-11-19 JP JP7514169A patent/JPH09505131A/ja active Pending
- 1993-11-19 WO PCT/EP1993/003235 patent/WO1995014175A1/de active IP Right Grant
- 1993-11-19 EP EP94901819A patent/EP0728263B1/de not_active Expired - Lifetime
- 1993-11-19 US US08/648,053 patent/US5709085A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1396778A (en) * | 1972-03-28 | 1975-06-04 | Af Hydraulics | Fluid supply systems |
US3960174A (en) * | 1974-09-03 | 1976-06-01 | Caterpillar Tractor Co. | Hydraulic circuit with dual tank system and method for using the same |
Non-Patent Citations (1)
Title |
---|
DIECKMANN ET AL.: "Anlage zur Regelung der öltemperatur für Hydraulik-Versuchsstände", OLHYDRAULIK UND PNEUMATIK, vol. 20, no. 2, 1976, MAINZ DE, pages 74 - 75 * |
Also Published As
Publication number | Publication date |
---|---|
DE59308483D1 (de) | 1998-06-04 |
DE4232542C1 (de) | 1994-01-27 |
JPH09505131A (ja) | 1997-05-20 |
EP0728263A1 (de) | 1996-08-28 |
EP0728263B1 (de) | 1998-04-29 |
US5709085A (en) | 1998-01-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2761190B1 (de) | Hydrauliksystem mit saug-rücklauffilter | |
DE60113601T2 (de) | Kühlvorrichtung | |
EP0728263A1 (de) | Ölkühlung im arbeitskreislauf einer baumaschine, insbesondere eines hydraulikbaggers | |
EP2855945A1 (de) | Hydrauliksystem | |
DE19609800C1 (de) | Brennstoffeinspritzsystem für Emulsionsbetrieb | |
DE3324477A1 (de) | Druckluftanlage von fahrzeugen, insbesondere druckluftbremsanlage | |
EP1008746A2 (de) | Kraftstoffeinspritzsystem | |
DE102011110822A1 (de) | Schmiervorrichtung für eine Spritzgießmaschine | |
EP0446757B1 (de) | Hydrauliksystem zur Versorgung einer Verstellpumpe | |
EP1286058A2 (de) | Hydrauliksystem für Spritzgiessmaschinen | |
DE10310486A1 (de) | Obengeführtes Rückflussleitungssystem | |
AT409835B (de) | Hydraulischer steuerkreis für eine spritzgussmaschine | |
WO2005075833A1 (de) | Schaltungsanordnung | |
DE3823892C2 (de) | Hydraulikanlage mit zwei Pumpen | |
DE3931699C2 (de) | ||
DE2917863C2 (de) | Progressivverteiler | |
DE3237019C2 (de) | Hublader mit einer Lenkanlage mit hydrostatischer Lenkkraftunterstützungsanlage | |
DE3401775C2 (de) | Hydrostatische Einrichtung mit einer einstellbaren Pumpe | |
DE9213097U1 (de) | Einrichtung zur Kühlung des im Arbeitskreislauf einer Baumaschine, insbesondere eines Hydraulikbaggers, vorhandenen Hydrauliköles | |
DE7313038U (de) | Kolbenpumpe | |
DE2757840C2 (de) | Hydraulische Steuervorrichtung für zwei getrennte Hydraulikkreise, deren einer zumindest einen bevorzugten Verbraucher und deren anderer zumindest einen nachrangigen Verbraucher aufweist. | |
DE4130128A1 (de) | Verfahren und einrichtung zur druckoelversorgung | |
EP2918876B1 (de) | Verfahren zum Betrieb eines Hydrauliksystems eines selbstfahrenden Straßenfertigers, Hydrauliksystem, insbesondere zur Durchführung des Verfahrens, sowie Straßenfertiger mit einem solchen Hydrauliksystem | |
DE9411163U1 (de) | Einrichtung zur Kühlung mindestens einer Fahrpumpe und/oder mindestens eines Fahrmotors eines hydrostatischen Fahrantriebes | |
DE3146513A1 (de) | Steuereinrichtung fuer ein hydrostatisches antriebssystem |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1994901819 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 08648053 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1994901819 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1994901819 Country of ref document: EP |