EP2761190B1 - Système hydraulique à filtre de retour et aspiration - Google Patents

Système hydraulique à filtre de retour et aspiration Download PDF

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Publication number
EP2761190B1
EP2761190B1 EP12746359.4A EP12746359A EP2761190B1 EP 2761190 B1 EP2761190 B1 EP 2761190B1 EP 12746359 A EP12746359 A EP 12746359A EP 2761190 B1 EP2761190 B1 EP 2761190B1
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EP
European Patent Office
Prior art keywords
suction
return
line
pump
filter
Prior art date
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Active
Application number
EP12746359.4A
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German (de)
English (en)
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EP2761190A2 (fr
Inventor
Jan-Martin VEIT
Markus STASS
Werner MÜNZENMAIER
Hans-Peter RENZ
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Putzmeister Engineering GmbH
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Putzmeister Engineering GmbH
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Publication of EP2761190A2 publication Critical patent/EP2761190A2/fr
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    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
    • 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
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/46—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing and placing the materials, e.g. slurry seals
    • E01C19/47—Hydraulic cement concrete mixers combined with distributing means specially adapted for road building
    • E01C19/475—Distributing means therefor, e.g. boom-and-bucket arrangements
    • 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
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices

Definitions

  • the invention relates to a slurry pump with a hydraulic system for driving and operating the same.
  • the state of the art DE 195 42 258 A1 discloses a slurry pump with a hydraulic system for driving and actuating the same with two delivery cylinders each containing a delivery cylinders, which open into a material feed container with frontal openings and are alternately connected during a pressure stroke of their delivery piston via a diverter valve or a slide valve of the slurry pump with a delivery line with two in each case a drive piston-containing hydraulic drive cylinders whose drive pistons are connected via a respective common piston rod with the delivery piston and actuated by a Reversierpumpe drive hydraulics of the hydraulic system and controllable, wherein the drive hydraulic forms a primary circuit, and further with a tank under atmospheric pressure for Intake of hydraulic oil.
  • the invention differs from conventional sludge pumps essentially in that the suction line to the primary pump and the returns from the primary circuit do not open into the tank, but that the suction line communicates with the output side of the suction-return filter, while the return lines to the inlet side of the suction Return filters are connected.
  • This so-called suction-return filter system requires an excess amount of oil to z. B. compensate for leakage oil, which led directly to the tank or to compensate for short-term missing oil volumes in the return due to the compressibility of the hydraulic oil on the pressure side.
  • a secondary circuit which has at least one motor-driven, acted upon by a second suction line with hydraulic oil, output connected to at least one second return line hydraulic secondary pump, the second suction preferably communicates via a suction filter with the tank and the second return line either flows into the tank or the input side is connected to the suction-return filter.
  • the remaining one Excess oil in the suction-return filter system is fed to the tank via the preload valve.
  • a preferred embodiment of the invention provides that in at least one of the return lines, an oil cooler is arranged. This is especially important when it comes to heating the hydraulic oil during operation. It is further proposed according to a preferred embodiment of the invention that in at least one of the input side connected to the suction-return filter return lines, a check valve is arranged.
  • the invention provides that at least one of the primary pumps in the primary circuit is designed as a filling and feed pump of a two-cylinder slurry pump driven by a reversing pump. It is a guided over the reversing pump closed hydraulic circuit, which forms the consumer in the terminology of the present invention together with the reversing pump.
  • one of the return lines is designed as a drain line of the reversible pump. If, to increase the cooling capacity, the reversing pump leakage oil must be routed through an oil cooler, it may be necessary to provide a non-return valve in the return line concerned in order to protect the reversing pump against pressure peaks from the other recirculation. In addition, a check valve must then be provided, which is connected on the outlet side directly to the suction-return filter or leads directly into the tank.
  • a further advantageous embodiment of the invention provides that one of the return lines is designed as a flushing oil line connected on the output side to an alternating flush valve of the reversing pump, which is preferably returned to the suction / return filter via the oil cooler.
  • one of the hydraulic primary pumps is connected to the drive hydraulics of a distribution mast as a consumer whose return line is connected on the input side to the suction-return filter.
  • one of the primary pumps or secondary pumps is connected to a hydraulic agitator drive whose return line is connected on the input side to the suction-return filter.
  • one of the secondary pumps in the secondary circuit can be connected to the drive hydraulics of a diverter valve or a slide valve of the slurry pump, whose return line opens into the tank.
  • a separate hydraulic secondary pump to be provided in the secondary circuit is, which is connected with its pressure side on the input side to the suction-return filter and supplies at least a portion of the required excess oil.
  • a check valve or by-pass valve is arranged between the inlet side of the suction / return filter and the tank.
  • the in the Fig. 1 and 2 hydraulic circuits shown are intended for a slurry pump, the two delivery cylinder 10,10 ', the frontal openings 12,12' open into a material feed container, not shown, and alternately during the pressure stroke via a diverter valve 14 with a delivery line, not shown, are connectable.
  • the delivery cylinders 10, 10 ' are driven in push-pull fashion via hydraulic drive cylinders 16, 16' and the hydraulic reversing pumps 18, 20 designed as swash plate axial piston pumps in the embodiment shown.
  • Between the delivery cylinders 10,10 'and the drive cylinders 16,16' is a water tank 28 through which the piston rods 26,26 'reach through.
  • the drive cylinder 16,16 ' are in the embodiments shown on the bottom side via hydraulic lines 30,30', 32,32 'of a closed Main circuit using the reversing 18.20 charged with hydraulic oil and are hydraulically connected to each other at their rod-side ends via a swing oil pipe 34.
  • the direction of movement of the drive piston 24,24 'and thus the delivery piston 22,22' is reversed, that the swash plates 18 ', 20' of the Reversierpumpen 18,20 triggered by a Um tenusignal swing through its zero position and thus the conveying direction of the hydraulic oil in the hydraulic lines Change 30,30 ', 32,32' of the main circuit.
  • the primary pumps 36,38 are arranged in a suction-return system having an output side 40 "connected to a suction-return filter 40 first suction line 42 and its coming from the reversing 18.20 Lecköltechnischen as return lines 44,44 'input side 40' to the A further return line 46 is branched off from the drive hydraulic system AH via an alternating purge valve 48 and a low-pressure limiting valve 50 and returned via the oil cooler 52 and the line 54 to the inlet side 40 'of the suction / return filter 40.
  • an excess amount of oil is required to z.
  • the surplus oil quantity is generated at least partially via a hydraulic secondary pump 60, 62 which is arranged in a secondary circuit and is driven by a motor and pressurized with hydraulic oil via at least one second suction line 58.
  • the second suction line 58 communicates either directly or via a suction filter 66 with the tank 68.
  • the secondary circuit is connected to at least one return line, which either opens into the tank 68 or is connected to the input side 40 'of the suction-return filter 40.
  • the suction-return filter system also includes a check valve on the input side 40 'of the suction-return filter 40, which protects as a bypass valve 72, the filter element of the suction return filter 40 from excessive pressure difference.
  • the advantages of the suction / return filter system consist in the fact that the excess amount of oil in conjunction with the preload valve 70 results in optimum suction conditions for the primary pumps in the primary circuit. Furthermore, the cold start behavior of the primary pumps is improved and the amount of oil circulating through the tank 68 is reduced. The latter means that the tank volume, for example, reduced to less than half the usual size and thus the tank and oil weight and to be exchanged at an oil change amount of oil.
  • the circuit for operating and controlling the distribution boom MH is a consumer of the primary circuit.
  • the supply of the mast control via the further primary pump 71, the suction side is connected via the line 73 to the first suction line 42 at the output 40 "of the suction-return filter 40 and the return line 74 via the oil cooler 52 and the line 54 to the input side of the suction
  • the outrigger control can be integrated, which ensures that the mobile concrete pump with its hydraulically actuated support legs is supported on the underground. as for example for extending the support legs and for extending used in the mast, come to a significant undersupply in the suction-return filter system. This is partially compensated in the embodiment shown by a large amount of excess oil, which is recycled in the secondary circuit with a large secondary pump 60,62 which is connected to the tank 68 to the suction-return filter 40.
  • the secondary pump 60 which serves to drive a stirrer RS arranged in the material feed container as a consumer, whose return line 76 is recirculated via the oil cooler 52 and the output line 54 to the inlet 40 'of the suction / return filter 40, is used for this purpose.
  • the embodiment according to Fig. 2 differs in this regard from Fig. 1 in that the agitator control RS is supplied with a primary pump 61 via the suction-return filter 40 and the first suction line 42 with hydraulic oil and is therefore part of the primary circuit.
  • a dedicated for the provision of the surplus oil amount secondary pump 62 is provided, the suction side 62 'communicates via the second suction line 58 and the suction filter 66 to the tank 68 and the pressure side 62 "either via the oil cooler 52 and the line 54 or via the check valve 78 and the line 80 to the input side 40 'of the suction-return filter 40 is guided.
  • Another special feature of the invention is that at least part of the excess oil quantity is made available via a separate, adequately dimensioned suction line 86.
  • This Nachsaugetechnisch 86 is connected to the suction filter 66 in the embodiment shown, from which the primary pumps 36,38,61,70 of the primary circuit suck in hydraulic oil via a Nachsaugeventil 88 and the first suction line 42.
  • the Nachsaugetechnisch 86 must be at least so dimensioned that at maximum Nachsaugemenge the flow rate in the Nachsaugetechnisch does not rise above 0.8 m / s and the negative pressure does not fall below the permissible minimum value of the priming primary pump, for example, 0.8 bar.
  • the Nachsaugetechnisch 86 and the Nachsaugeventil 88 must be sufficiently large, because there may be an operating condition in which only the primary pump 71 of the mast hydraulic MH is in operation and the drive for the other hydraulic pumps is turned off. In this case, then the secondary pump 60 and 62 for the excess oil amount out of service.
  • the differential cylinders extend or retract in the mast hydraulic MH or in the support hydraulics, there is either an excess of oil at the suction return filter 40, which is conducted via the biasing valve 70 to the tank 68, or an oil shortage results, which then via the Nachsauge effet 86 and the Nachsaugeventil 88 and the suction filter 66 from the tank 68 must be compensated.
  • the embodiment according to Fig. 1 additionally contains the special feature that the leakage oil of the reversing 18.20 is at least partially passed through the oil cooler 52, thereby obtaining an increase in the cooling capacity.
  • a check valve 90 is provided to protect the reversing pumps 18,20 of the consumer AH against pressure peaks from the other returns.
  • a check valve 92 must be provided, which is the outlet side connected directly to the input 40 'of the suction-return filter 40 or leads directly into the tank 68.
  • the invention relates to a slurry pump with a hydraulic system for driving and operating the same.
  • the hydraulic system includes a tank 68 for receiving hydraulic oil, a primary circuit having at least one hydraulic consumer AH, MH, which has at least one acted upon by a first suction line 42 with hydraulic oil primary pump 36,38,61,70 and the output side connected to at least one first return line and the one output side Having the first suction line 42 communicating and the input side with return oil from the at least one return line acted upon suction-return filter 40.
  • a special feature of the invention is that the first suction line 42 communicates via a separate Nachsauge effet 86 and a suction filter 66 to the tank 68, wherein in the Nachsauge effet 86 a biased toward suction filter 66 Nachsaugeventil 88 is arranged.

Claims (6)

  1. Pompe pour matières épaisses comprenant un système hydraulique pour commander et actionner celle-ci, avec deux cylindres de refoulement (10, 10') contenant chacun un piston de refoulement (22, 22'), qui débouchent avec des ouvertures frontales (12, 12') dans un récipient d'alimentation de matière et qui sont connectés en alternance à une conduite de refoulement pendant une course de pression de leur piston de refoulement (22, 22') par le biais d'un aiguillage tubulaire (14) ou d'une soupape à tiroir de la pompe pour matières épaisses, avec deux cylindres d'entraînement hydrauliques (16, 16') contenant chacun un piston d'entraînement (24, 24'), dont les pistons d'entraînement (24, 24') sont connectés à chaque fois par le biais d'une tige de piston commune (26, 26') aux pistons de refoulement (22, 22') et peuvent être actionnés et commandés par le biais d'une hydraulique d'entraînement (AH) du système hydraulique contenant une pompe d'inversion (18, 20), et avec un mât de distribution pouvant être actionné et commandé par le biais d'une hydraulique de mât (MH) du système hydraulique, l'hydraulique d'entraînement (AH) et l'hydraulique de mât (MH) formant un circuit primaire commun et en outre avec un réservoir (68) à la pression atmosphérique pour recevoir de l'huile hydraulique,
    le circuit primaire
    - présentant au moins une pompe primaire (36, 38, 61, 71) entraînée par un moteur, sollicitée avec de l'huile hydraulique par le biais d'une première conduite d'aspiration (42),
    - étant raccordé du côté de la sortie à au moins une première conduite de retour,
    - et présentant un filtre de retour d'aspiration (40) communiquant du côté de la sortie avec la première conduite d'aspiration (42) et sollicité du côté de l'entrée avec de l'huile de retour provenant de l'au moins une conduite de retour,
    - au moins l'une des pompes primaires (36, 38) étant réalisée en tant que pompe de remplissage et d'alimentation de l'hydraulique d'entraînement (AH) et une autre des pompes primaires (71) étant connectée à l'hydraulique de mât (MH), dont la conduite de retour (74) est raccordée du côté de l'entrée au filtre de retour d'aspiration (40),
    une conduite de dérivation partant de la première conduite d'aspiration (42), débouchant dans le réservoir (68) par le biais d'une soupape de précontrainte (70) étant prévue,
    un circuit secondaire étant prévu,
    - lequel présente au moins une pompe secondaire (60, 62) entraînée par un moteur, sollicitée avec de l'huile hydraulique par le biais d'une deuxième conduite d'aspiration (58),
    - et lequel est raccordé du côté de la sortie à au moins une deuxième conduite de retour,
    - la deuxième conduite d'aspiration (58) communiquant directement par le biais d'un filtre d'aspiration supplémentaire (66) avec le réservoir (68),
    - la deuxième conduite de retour soit débouchant dans le réservoir (68) soit étant raccordée du côté de l'entrée au filtre de retour d'aspiration (40),
    - l'une des pompes secondaires (62) étant raccordée par son côté pression du côté de l'entrée au filtre de retour d'aspiration (40) et/ou l'une des pompes secondaires (60) étant connectée à un entraînement d'agitateur hydraulique (RS), dont la conduite de retour (76) est raccordée du côté de l'entrée au filtre de retour d'aspiration (40),
    - la première conduite d'aspiration (42) communiquant par le biais d'une conduite de réaspiration séparée (86) et d'un filtre d'aspiration supplémentaire (66) avec le réservoir (68),
    - et une soupape de réaspiration (88) précontrainte dans la direction du filtre d'aspiration supplémentaire (66) étant disposée dans la conduite de réaspiration (86), laquelle est dimensionnée de telle sorte qu'un manque d'huile dans le circuit primaire puisse être compensé avec celle-ci.
  2. Pompe pour matières épaisses selon la revendication 1, caractérisée en ce qu'une autre des conduites de retour est réalisée sous forme de conduite d'huile de rinçage (46) raccordée du côté de la sortie à une soupape de rinçage alternative (48) du circuit primaire.
  3. Pompe pour matières épaisses selon la revendication 1 ou 2, caractérisée en ce que dans au moins l'une des conduites de retour conduisant au filtre de retour d'aspiration (40) est disposé un refroidisseur d'huile (52).
  4. Pompe pour matières épaisses selon l'une quelconque des revendications 1 à 3, caractérisée en ce que dans au moins l'une des conduites de retour raccordées du côté de l'entrée au filtre de retour d'aspiration (40) est disposé un clapet antiretour (78, 90, 92).
  5. Pompe pour matières épaisses selon l'une quelconque des revendications 1 à 4, caractérisée en ce qu'une pompe hydraulique (64) est connectée à une hydraulique d'entraînement de l'aiguillage tubulaire (RW) ou de la soupape à tiroir, dont la conduite de retour (80) débouche dans le réservoir (68).
  6. Pompe pour matières épaisses selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'entre le côté d'entrée (40') du filtre de retour d'aspiration (40) et le réservoir (68) est disposé un clapet antiretour ou une soupape de dérivation (72).
EP12746359.4A 2011-09-30 2012-08-15 Système hydraulique à filtre de retour et aspiration Active EP2761190B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011083874A DE102011083874A1 (de) 2011-09-30 2011-09-30 Hydrauliksystem mit Saug-Rücklauffilter
PCT/EP2012/065931 WO2013045167A2 (fr) 2011-09-30 2012-08-15 Système hydraulique à filtre de retour par aspiration

Publications (2)

Publication Number Publication Date
EP2761190A2 EP2761190A2 (fr) 2014-08-06
EP2761190B1 true EP2761190B1 (fr) 2017-03-08

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EP12746359.4A Active EP2761190B1 (fr) 2011-09-30 2012-08-15 Système hydraulique à filtre de retour et aspiration

Country Status (8)

Country Link
US (1) US9551362B2 (fr)
EP (1) EP2761190B1 (fr)
JP (1) JP6082745B2 (fr)
KR (1) KR101968787B1 (fr)
CN (1) CN103890411B (fr)
BR (1) BR112014007470B1 (fr)
DE (1) DE102011083874A1 (fr)
WO (1) WO2013045167A2 (fr)

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DE102004015419A1 (de) * 2004-03-26 2005-10-13 Putzmeister Ag Vorrichtung und Verfahren zur Steuerung einer Dickstoffpumpe
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US7553408B2 (en) * 2006-03-07 2009-06-30 Deere & Company Hydraulic lubrication filter circuit
DE102006051821A1 (de) * 2006-11-03 2008-05-08 Hydac Filtertechnik Gmbh Versorgungseinrichtung
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DE102009008517B4 (de) * 2009-02-11 2018-01-04 Götz Hudelmaier Hydraulischer Antrieb einer Dickstoffpumpe mit Ladedruckeinrichtung

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EP2761190A2 (fr) 2014-08-06
DE102011083874A1 (de) 2013-04-04
KR101968787B1 (ko) 2019-04-12
US9551362B2 (en) 2017-01-24
CN103890411B (zh) 2016-11-02
JP6082745B2 (ja) 2017-02-15
WO2013045167A2 (fr) 2013-04-04
CN103890411A (zh) 2014-06-25
BR112014007470B1 (pt) 2021-01-19
KR20140078635A (ko) 2014-06-25
US20140230424A1 (en) 2014-08-21
JP2014530330A (ja) 2014-11-17
BR112014007470A2 (pt) 2017-04-04
WO2013045167A3 (fr) 2013-06-27

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