EP2013423A2 - Method of reducing the load of one or more engines in a large hydraulic excavator - Google Patents

Method of reducing the load of one or more engines in a large hydraulic excavator

Info

Publication number
EP2013423A2
EP2013423A2 EP07724512A EP07724512A EP2013423A2 EP 2013423 A2 EP2013423 A2 EP 2013423A2 EP 07724512 A EP07724512 A EP 07724512A EP 07724512 A EP07724512 A EP 07724512A EP 2013423 A2 EP2013423 A2 EP 2013423A2
Authority
EP
European Patent Office
Prior art keywords
engine
load
flow rate
reducing
consumer
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.)
Withdrawn
Application number
EP07724512A
Other languages
German (de)
French (fr)
Inventor
Wilfried Busse
Reinhard Emminger
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.)
Terex Germany GmbH and Co KG
Original Assignee
Terex Germany GmbH and Co KG
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 Terex Germany GmbH and Co KG filed Critical Terex Germany GmbH and Co KG
Publication of EP2013423A2 publication Critical patent/EP2013423A2/en
Withdrawn legal-status Critical Current

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
    • E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • E02F9/2235—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/06—Motor parameters of internal combustion engines
    • F04B2203/0604—Power
    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/06—Motor parameters of internal combustion engines
    • F04B2203/0605—Rotational speed

Definitions

  • the invention relates to a method for reducing the load of at least one arranged in a large hydraulic excavator engine, in particular an internal combustion engine.
  • DE 699 20 452 T2 describes a mobile working machine with a hydraulic circuit, the hydraulic circuit comprising one of the cylinders arranged in a lifting device which is suitable for handling a variable load. Further, an accumulator for recovering or returning decreasing load energy is provided.
  • the invention has for its object to provide a method for reducing the load of at least one arranged in a large hydraulic excavator engine, in particular an internal combustion engine, in overload situations, through which the described negative effects can be largely compensated.
  • This object is achieved by a method for reducing the load of at least one arranged in a large hydraulic excavator engine, in particular an internal combustion engine by at least one hydraulic auxiliary load, in particular a pump is lowered so far in its flow rate in a rotational overload situation of the respective motor until the respective engine is returned to its proper speed range.
  • At least one main hydraulic consumer such as a main working pump, be its flow rate is reduced by a predetermined amount of flow. This Förde / volume reduction is carried out until the respective engine is returned to its operating speed range.
  • Speed reduction can be initially reduced at least one hydraulic secondary consumer (secondary consumer) in its capacity.
  • controllable axial piston pumps for example for the fan drives of oil and water cooling, which are often assigned constant pumps.
  • the main work pumps are also advantageously formed by controllable high-pressure axial piston pumps, the flow rate control is analogous to the Mauworkingem by proportional or servo valves. They are reduced in their flow rate only when the fine control has taken place on the first-time reduction of the secondary consumers.
  • Figures 1 and 2 are graphical representations of different load spectra of an engine mounted in a large hydraulic excavator.
  • the engine can be returned to the area of its installed power.
  • auxiliary hydraulic consumer eg a pump
  • Motor power 2 x 900 kW installed working pumps: 4 x 920 l / min, corresponding to 3,680 l / min.
  • the secondary consumers are reduced by 500 l / min, in their flow rate.
  • the diagram shows that only a reduction of up to 1,900 kW is possible here, which still exceeds the installed engine power of 1,800 kW.

Abstract

Method of reducing the load of at least one engine, in particular an internal combustion engine, arranged in a large hydraulic excavator by at least one hydraulic secondary consumer, in particular a feed pump, in an overload speed situation of the respective engine, being reduced in its delivery quantity until the respective engine is returned again to its operational speed range.

Description

Verfahren zur Lastminderung eines oder mehrerer Motore in einem Groß- Method for reducing the load of one or more motors in a large
Hydraulikbaggerhydraulic excavators
Die Erfindung betrifft ein Verfahren zur Lastminderung mindestens eines in einem Groß-Hydraulikbagger angeordneten Motors, insbesondere eines Verbrennungsmotors.The invention relates to a method for reducing the load of at least one arranged in a large hydraulic excavator engine, in particular an internal combustion engine.
In der DE 699 20 452 T2 wird eine mobile Arbeitsmaschine mit hydraulischem Kreislauf beschrieben, wobei der hydraulische Kreislauf einen der Zylinder umfasst, der in einer Hebevorrichtung angeordnet ist, die geeignet ist, eine variable Last zu handhaben. Ferner ist ein Akkumulator zur Gewinnung oder Rückführung abnehmender Lastenergie vorgesehen.DE 699 20 452 T2 describes a mobile working machine with a hydraulic circuit, the hydraulic circuit comprising one of the cylinders arranged in a lifting device which is suitable for handling a variable load. Further, an accumulator for recovering or returning decreasing load energy is provided.
Die Überlastung eines Antriebsmotors zeigt sich unter anderem am Drehzahlabfall. Wird diesem Drehzahlabfall nicht durch Reduzierung der Last entgegengewirkt, bricht die Drehzahl des Antriebsmotors weiter ein und zwar bis zum Stillstand des Motors.The overload of a drive motor is reflected among other things in the speed drop. If this reduction in speed is not counteracted by reducing the load, the speed of the drive motor continues to break until the motor stops.
Groß-Hydraulikbagger mit einem Einsatzgewicht > 100 Tonnen sind üblicherweise mit installierten Motorleistuqgen in der Größenordnung von 500 bis 3.000 kW ausgestattet. Der Hubraum dieser Motoren liegt in der Regel zwischen 15 und 60 1. Die Hubraumklassen entsprechen hierbei ihrer abnehmbaren Leistung.Large hydraulic excavators with an operating weight> 100 tons are usually equipped with installed motor power units in the order of 500 to 3,000 kW. The displacement of these engines is usually between 15 and 60 1. The capacity classes correspond to their removable power.
Die Bereitstellung noch größer dimensionierter Motoren, die jeglichen Überlastbetrieb kompensieren können, ist mit derart hohen Kosten verbunden, dass sie unwirtschaftlich ist. Demzufolge kommen aus den genannten Gründen Motoren zum Einsatz, die bei bestimmten Betriebszuständen in den Überlastbereich gelangen und, wie dargelegt, mit Drehzahleinbrüchen reagieren.The provision of even larger sized motors that can compensate for any overload operation is associated with such high costs that it is uneconomical. Consequently, for the reasons mentioned, motors are used which, in the case of certain operating states, reach the overload range and, as explained, react with speed reductions.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Lastminderung mindestens eines in einem Groß-Hydraulikbagger angeordneten Motors, insbesondere eines Verbrennungsmotors, bei Überlastsituationen bereitzustellen, durch welche die dargelegten negativen Effekte weitestgehend kompensiert werden können.The invention has for its object to provide a method for reducing the load of at least one arranged in a large hydraulic excavator engine, in particular an internal combustion engine, in overload situations, through which the described negative effects can be largely compensated.
Dieses Ziel wird erreicht durch ein Verfahren zur Lastminderung mindestens eines in einem Groß-Hydraulikbagger angeordneten Motors, insbesondere eines Verbrennungsmotors, indem in einer drehzahlmäßigen Überlastsituation des jeweiligen Motors mindestens ein hydraulischer Nebenverbraucher, insbesondere eine Pumpe, in seiner Fördermenge so weit abgesenkt wird, bis der jeweilige Motor wieder in seinen betriebsgemäßen Drehzahlbereich zurückgeführt ist.This object is achieved by a method for reducing the load of at least one arranged in a large hydraulic excavator engine, in particular an internal combustion engine by at least one hydraulic auxiliary load, in particular a pump is lowered so far in its flow rate in a rotational overload situation of the respective motor until the respective engine is returned to its proper speed range.
Vorteilhafte Weiterbildungen des Erfindungsgegenstandes sind den Unteransprüchen zu entnehmen.Advantageous developments of the subject invention can be found in the dependent claims.
Reicht die angestrebte Reduzierung der Fördermenge des/der Nebenverbraucher (s) nicht aus, um den jeweiligen Motor wieder in seinen betriebsgemäßen Drehzahlbereich zurückzuführen, wird darüber hinaus vorgeschlagen, dass nach Erreichen der Absenkfördermenge des Nebenverbrauchers mindestens ein hydraulischer Hauptverbraucher, wie beispielsweise eine Hauptarbeitspumpe, bezüglich seiner Fördermenge um einen vorgebbaren Fördermengenanteil reduziert wird. Diese Förde/mengenreduzierung wird so lange durchgeführt, bis der jeweilige Motor wieder in seinen betriebsgemäßen Drehzahlbereich zurückgeführt ist.If the desired reduction of the delivery rate of the secondary consumer (s) is not sufficient to return the respective engine to its operating speed range, it is also proposed that after reaching the secondary delivery flow rate, at least one main hydraulic consumer, such as a main working pump, be its flow rate is reduced by a predetermined amount of flow. This Förde / volume reduction is carried out until the respective engine is returned to its operating speed range.
Groß-Hydraulikbagger mit einem Einsatzgewicht > 100 Tonnen sind mit einer Vielzahl von hydraulischen Verbrauchern (Haupt- und Nebenverbrauchern) ausgerüstet, die vielfach durch fördermengenverstellbare Axial-Kolben pumpen gebildet sind, deren Leistungsaufnahme aufaddiert wird und somit die Gesamtlast des oder der Motore ausmacht.Large hydraulic excavators with an operating weight> 100 tons are equipped with a large number of hydraulic consumers (main and secondary consumers), which are often formed by adjustable displacement axial piston pumps, the power consumption is added and thus the total load of the motor or makes.
Um möglichst mit der kleinsten wirtschaftlich rechenbaren Hubraumklasse bezüglich der Motore auszukommen und, wie dargelegt, die Antriebsmotore schon bei relativ geringer Überlast, z. B. beim Eindringen einer Schaufel ins Material, in Drehzahldrückung kommen können, wird zunächst mindestens ein hydraulischer Nebenverbraucher (Sekundärverbraucher) in seiner Förderleistung reduziert.In order to get along as possible with the smallest economically calculable displacement class with respect to the motors and, as stated, the drive motors even at relatively low overload, z. B. in the penetration of a blade into the material, in Speed reduction can be initially reduced at least one hydraulic secondary consumer (secondary consumer) in its capacity.
Dies erfolgt, einem weiteren Gedanken der Erfindung gemäß, dadurch, dass bei Einsatz von Axial-Kolben pumpen deren Verstellung durch Druckproportional- oder Servoventile erfolgt.This is done, according to a further idea of the invention, in that when using axial piston pump whose adjustment is done by pressure proportional or servo valves.
Angesprochen sind hierbei unter anderem regelbare Axial-Kolbenpumpen, beispielsweise für die Lüfterantriebe der Öl- und Wasserkühlung, denen vielfach Konstantpumpen zugeordnet werden.This includes, among other things, controllable axial piston pumps, for example for the fan drives of oil and water cooling, which are often assigned constant pumps.
Die Hauptarbeitspumpen werden ebenfalls in vorteilhafter Weise durch regelbare Hochdruck-Axial-Kolbenpumpen gebildet, deren Fördermengenregelung analog zu den Nebenverbrauchem durch Proportional- oder Servoventile erfolgt. Sie werden in ihrer Fördermenge erst dann reduziert, wenn die Feinsteuerung über die zunächst erfolgende Reduzierung der Nebenverbraucher stattgefunden hat.The main work pumps are also advantageously formed by controllable high-pressure axial piston pumps, the flow rate control is analogous to the Nebenverbrauchem by proportional or servo valves. They are reduced in their flow rate only when the fine control has taken place on the first-time reduction of the secondary consumers.
Der Erfindungsgegenstand ist in der Zeichnung dargestellt und wird wie folgt beschrieben. Es zeigen:The subject invention is illustrated in the drawing and is described as follows. Show it:
* Figuren 1 und 2 graphische Darstellung unterschiedlicher Lastkollektive eines in einem Groß-Hydraulikbagger angeordneten Motors.Figures 1 and 2 are graphical representations of different load spectra of an engine mounted in a large hydraulic excavator.
Im Folgenden werden zwei Beispiele abgehandelt:Here are two examples:
Beispiel 1 :Example 1 :
Motorleistung: 2 x 900 kWMotor power: 2 x 900 kW
Installierte Arbeitspumpen: 4 x 920 l/min, entsprechend 3.680 l/min.Installed working pumps: 4 x 920 l / min, corresponding to 3,680 l / min.
Arbeitsdruck: 280 bar. Dem zugehörigen Schaubild ist entnehmbar, dass bei gegebener Motorleistung (1.800 kW) und gegebenem Pumpenarbeitsdruck (280 bar) sich eine Pumpenarbeitslast von 1.900 kW einstellt, die die installierte Motorleistung (1.800 kW) übersteigt.Working pressure: 280 bar. It can be seen from the accompanying diagram that for a given engine power (1,800 kW) and given pump operating pressure (280 bar), a pump working load of 1,900 kW is set, which exceeds the installed engine power (1,800 kW).
Durch Reduzierung der Fördermenge mindestens eines nicht weiter angegebenen hydraulischen Nebenverbrauchers (z. B. einer Pumpe), beispielsweise um 100 kW, kann der Motor wieder in den Bereich seiner installierten Leistung zurückgeführt werden.By reducing the delivery rate of at least one auxiliary hydraulic consumer (eg a pump), for example by 100 kW, which is not further specified, the engine can be returned to the area of its installed power.
Beispiel 2:Example 2:
Motorleistung: 2 x 900 kW installierte Arbeitspumpen: 4 x 920 l/min, entsprechend 3.680 l/min.Motor power: 2 x 900 kW installed working pumps: 4 x 920 l / min, corresponding to 3,680 l / min.
Arbeitsdruck: 320 bar.Working pressure: 320 bar.
Bei gegebener installierter Motorleistung (1.800 kW) in Verbindung mit dem ebenfalls gegebenen Arbeitsdruck (320 bar) würde sich eine benötigte Last der Arbeitspumpen von 2.200 kW einstellen.With a given installed engine power (1,800 kW) in conjunction with the also given working pressure (320 bar), a required work pump load of 2,200 kW would be set.
In einer ersten Phase werden die Nebenverbraucher um 500 l/min, in ihrer Fördermenge reduziert. Dem Schaubild ist zu entnehmen, dass hier lediglich eine Reduzierung bis auf 1.900 kW möglich ist, die die installierte Motorleistung von 1.800 kW immer noch übersteigt.In a first phase, the secondary consumers are reduced by 500 l / min, in their flow rate. The diagram shows that only a reduction of up to 1,900 kW is possible here, which still exceeds the installed engine power of 1,800 kW.
Durch Reduzierung der Leistung eines Hauptverbrauchers um 100 kW kann der Motor nunmehr wieder in den Bereich seiner installierten Leistung von 1.800 kW zurückgeführt werden. Drehzahldrückungen sind somit nicht mehr gegeben. By reducing the power of a main consumer by 100 kW, the engine can now be returned to its installed capacity of 1,800 kW. Speed cancellations are thus no longer given.

Claims

Patentansprüche claims
1. Verfahren zur Lastminderung mindestens eines in einem Groß- Hydraulikbagger angeordneten Motors, insbesondere eines Verbrennungsmotors, indem in einer drehzahlmäßigen Überlastsituation des jeweiligen Motors mindestens ein hydraulischer Nebenverbraucher, insbesondere eine Arbeitspumpe, in seiner Fördermenge soweit abgesenkt wird, bis der jeweilige Motor wieder in seinen betriebsgemäßen Drehzahlbereich zurückgeführt ist.1. A method for reducing the load of at least one arranged in a large hydraulic excavator engine, in particular an internal combustion engine by at least one hydraulic auxiliary load, in particular a work pump, is lowered in its flow rate in a speed overload situation of the respective engine until the respective engine back into his operating speed range is returned.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass der jeweilige Nebenverbraucher um einen vorgebbaren Fördermengenanteil, bezogen auf seine Gesamtfördermenge, abgesenkt wird, und dass nach Erreichen dieser Absenkfördermenge mindestens ein hydraulischer Hauptverbraucher, insbesondere eine Hauptarbeitspumpe, bezüglich seiner Fördermenge um einen vorgebbaren Fördermengenanteil reduziert wird.2. The method according to claim 1, characterized in that the respective auxiliary load is lowered by a predeterminable flow rate proportion, based on its total delivery, and that after reaching this Absenkfördermenge at least one main hydraulic consumer, in particular a main working pump, reduced in terms of its delivery rate by a predetermined flow rate becomes.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der jeweilige Nebenverbraucher durch eine fördermengenverstellbare Axialkolbenpumpe gebildet ist, deren Fördermenge um einen vorgebbaren Fördermengenanteil abgesenkt wird.3. The method according to claim 1 or 2, characterized in that the respective auxiliary consumers is formed by a variable-displacement axial piston pump, the flow rate is lowered by a predetermined delivery rate.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der jeweilige Hauptverbraucher durch eine Hochdruck- Axialkolbenpumpe gebildet ist, die in ihrer Förderleistung zurückgeschwenkt wird.4. The method according to any one of claims 1 to 3, characterized in that the respective main consumer is formed by a high-pressure axial piston pump, which is pivoted back in its capacity.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass für die Ansteuerung des jeweiligen Verbrauchers Proportional- oder Servoventile eingesetzt werden. 5. The method according to any one of claims 1 to 4, characterized in that proportional or servo valves are used for the control of the respective consumer.
EP07724512A 2006-05-03 2007-04-24 Method of reducing the load of one or more engines in a large hydraulic excavator Withdrawn EP2013423A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006020441.7A DE102006020441B4 (en) 2006-05-03 2006-05-03 Method for reducing the load of one or more engines in a large hydraulic excavator
PCT/EP2007/003582 WO2007124892A2 (en) 2006-05-03 2007-04-24 Method of reducing the load of one or more engines in a large hydraulic excavator

Publications (1)

Publication Number Publication Date
EP2013423A2 true EP2013423A2 (en) 2009-01-14

Family

ID=38222681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07724512A Withdrawn EP2013423A2 (en) 2006-05-03 2007-04-24 Method of reducing the load of one or more engines in a large hydraulic excavator

Country Status (6)

Country Link
EP (1) EP2013423A2 (en)
AU (1) AU2007245841B8 (en)
CA (1) CA2651029C (en)
DE (1) DE102006020441B4 (en)
WO (1) WO2007124892A2 (en)
ZA (1) ZA200808927B (en)

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DE2331617A1 (en) * 1973-06-22 1975-01-16 Bosch Gmbh Robert CONTROL DEVICE FOR HYDROPUMPS
DE3176207D1 (en) * 1980-10-09 1987-06-25 Hitachi Construction Machinery Method for controlling a hydraulic power system
DE3611553C1 (en) * 1986-04-07 1987-07-23 Orenstein & Koppel Ag Arrangement for operating a diesel-hydraulic drive
DE4102621A1 (en) * 1991-01-30 1992-08-06 Orenstein & Koppel Ag HYDROSTATIC DRIVE FOR WORKING MACHINES
AU4943699A (en) * 1998-06-27 2000-01-17 Lars Bruun Mobile working machine
DE10307190A1 (en) * 2003-02-20 2004-09-16 O & K Orenstein & Koppel Gmbh Method for controlling a hydraulic system of a mobile work machine
DE102005017127B4 (en) * 2005-04-14 2021-09-16 Linde Material Handling Gmbh Combustion engine powered industrial truck with overload protection

Non-Patent Citations (1)

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Title
See references of WO2007124892A3 *

Also Published As

Publication number Publication date
ZA200808927B (en) 2009-07-29
CA2651029C (en) 2014-01-28
AU2007245841A1 (en) 2007-11-08
CA2651029A1 (en) 2007-11-08
AU2007245841B8 (en) 2013-12-12
WO2007124892A3 (en) 2008-03-20
WO2007124892A2 (en) 2007-11-08
DE102006020441B4 (en) 2017-01-26
DE102006020441A1 (en) 2007-11-15
AU2007245841B2 (en) 2013-11-28

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