EP1515041A1 - Groupe hydraulique avec un réservoir pour liquide hydraulique et une unité motopompe - Google Patents

Groupe hydraulique avec un réservoir pour liquide hydraulique et une unité motopompe Download PDF

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Publication number
EP1515041A1
EP1515041A1 EP04020525A EP04020525A EP1515041A1 EP 1515041 A1 EP1515041 A1 EP 1515041A1 EP 04020525 A EP04020525 A EP 04020525A EP 04020525 A EP04020525 A EP 04020525A EP 1515041 A1 EP1515041 A1 EP 1515041A1
Authority
EP
European Patent Office
Prior art keywords
hydraulic unit
unit according
interior
frame
pressure
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
Application number
EP04020525A
Other languages
German (de)
English (en)
Other versions
EP1515041B1 (fr
Inventor
Klaus-Dieter Pierzyna
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.)
Bosch Rexroth AG
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Bosch Rexroth AG
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 Bosch Rexroth AG filed Critical Bosch Rexroth AG
Publication of EP1515041A1 publication Critical patent/EP1515041A1/fr
Application granted granted Critical
Publication of EP1515041B1 publication Critical patent/EP1515041B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • 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
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors

Definitions

  • the invention relates to a hydraulic unit with a reservoir for hydraulic fluid and with one out a motor and a pump driven by this Motor-pump unit.
  • hydraulic units are used for various purposes produced in various embodiments.
  • the hydraulic units can in addition to the Reservoir and the engine-pump unit with more Components, such. Valves, filters, coolers or monitors, be equipped.
  • hydraulic units in which a series of measures to dampen the provided by the engine-pump unit outgoing sound are.
  • the invention is based on the object, a hydraulic unit to create the type mentioned, according to the requirements of the Atex Directive 94/9 / EC in potentially explosive atmospheres Fields is used. This is in particular be sure that by a bearing damage heated surface of the pump does not ignite an explosive Atmosphere triggers.
  • the invention makes of the type of protection overpressure encapsulation "p" use.
  • the invention makes it possible, in addition to the hydraulic unit further components in the Interior of the frame closed on all sides. There these components are also surrounded by protective gas, they do not need the requirements of the Atex Directive meet, so that inexpensive series versions of this Components can be used.
  • the invention trained hydraulic unit are from the outside electrical Energy and the protective gas supplied. Are they too Hydraulic pressure control valves in the interior of the Frame only need the leading to consumers Hydraulic lines led out of the frame to become.
  • the features of the subclaims 2 to 4 relate to the limitation of the pressure of the protective gas in the interior of the frame to an upper value. Through this Measures become those acting on the walls of the frame Limited forces, so that the design effort for Holding the walls of the frame within reasonable limits.
  • the claims 5 to 8 relate to the monitoring of the pressure in Interior of the frame to a lower value. This monitoring ensures that at a pressure drop of the protective gas in the interior of the frame under the for the type of protection Pressurized enclosure "p" required at least Value appropriate measures can be taken that z. B. in such a case, the energy supply to all Modules of the hydraulic unit immediately suppressed becomes.
  • the features of claims 9 to 16 relate to constructive design of the frame and the supply as well the leadership of Zündschutzgases in the interior of the frame.
  • FIG. 1 shows a schematic representation of a building 10, in which there is an explosive atmosphere.
  • FIG. 1 shows a building 10 set up in the building 10. also shown only schematically hydraulic unit 11 according to the invention.
  • the hydraulic unit 11 is of a enclosed on all sides closed frame 12.
  • a motor-pump unit 15 is arranged in the interior 13 of the frame 12.
  • the motor-pump unit 15 consists of an air-cooled Electric motor 16 and one of the electric motor 16th driven pump 17.
  • the pump 17 delivers hydraulic Pressure fluid from a reservoir 20 via hydraulic Lines 21, 22, 23 to a not shown in the figure 1 hydraulic consumer who is outside the Frame 12 is located.
  • the consumer may be z. B. to act a hydraulic cylinder or a hydraulic motor. From the consumer flows through the pressure medium via another line 25 back to the reservoir 20.
  • a in the interior 13th arranged valve 27 controls the consumer supplied Amount of pressure medium.
  • An outside of the building 10 arranged fan 30 leads to the interior 13 of the frame 12 serving as protective gas ambient air.
  • the protective gas is supplied to the inner space 13 via a supply channel 31.
  • the frame 12 is provided with a connecting piece 32 for the supply channel 31. In the region of the connecting piece 32 of the supply channel 31 is in a arranged in the interior 13 intake passage 33 via.
  • the intake passage 33 divides the air flow Q i supplied from the blower 30 into two partial flows Q 1 and Q 2 .
  • the partial flow Q 1 is fed to a frontal cooling air inlet 36 of the electric motor 16, while the partial flow Q 2 flows through the inner space 13.
  • the frame 12 is provided with a valve assembly 38 through which the protective gas exits the interior.
  • the valve assembly 38 is arranged in the frame 12, that the entire inner space 13 is flowed through by the protective gas. Details of the valve assembly 38 are described below with reference to FIG 2.
  • the air flow exiting the interior 13 via the valve arrangement 38 is designated by Q o . It is practically equal to the supplied air flow Q i , apart from any leakage.
  • two pressure sensors 40, 41 are arranged, which detect the pressure of the protective gas, which is also referred to as the barrier pressure p sp .
  • the output signals of the pressure sensors 40, 41 are supplied to an electrical circuit 43, which evaluates the output signals of the pressure sensors 40, 41 and forms a first switching signal when the pressure p sp falls below a minimum value p min , which for a proper function of the type of protection overpressure enclosure "p " is required.
  • This pressure is on the order of 1 mbar.
  • the pressure p sp is detected redundantly for security reasons.
  • the circuit arrangement 43 shuts off the supply of electrical energy to the assemblies arranged in the interior 13, in particular the motor 16.
  • the circuit arrangement 43 forms a second switching signal when the pressure p sp exceeds a maximum value p max1 .
  • the monitoring of the maximum value p max1 is nevertheless necessary in order not to mechanically overstress the frame 12 by the forces acting on its inner surfaces. So z. B. at a pressure p sp of 10 mbar on an area of 1 m 2, a force of 1000 N on this area.
  • the maximum value p max1 therefore results from the structural design of the frame 12, with a usual safety margin being taken into account. For reasons of mechanical safety must be provided for an effective limitation of the maximum value of the pressure p sp in the interior 13.
  • the valve arrangement 38 and the circuit arrangement 43 which evaluates the output signals of the pressure sensors 40, 41, are provided.
  • the valve arrangement 38 is dimensioned such that even under unfavorable operating conditions it limits the pressure p sp to a value p max0 which is smaller than the maximum value p max1 determined by the construction of the frame 12. If, in the event of a fault, the valve arrangement is no longer able to limit the pressure p sp to the value p max0 and the pressure p sp has increased so much that it exceeds the permissible maximum value p max1 , the circuit arrangement 43 forms a corresponding switching signal which either signals only a fault or z. B. via an electrical line 45 and a control device 46, the blower 30 is influenced in terms of a safe operating condition.
  • FIGS 2 and 3 show a second formed according to the invention hydraulic unit 50 with a rectangular frame 51. Components that match those of the hydraulic unit 11 shown in Figure 1, are provided with the same reference numerals.
  • FIG. 2 shows a side view corresponding to the illustration in FIG. 1, while FIG. 3 shows a plan view of the hydraulic unit 50.
  • To a bottom plate 52 eight perpendicular plates 54 to 61 are welded, which form a three areas 63 to 65 existing reservoir 66 with U-shaped cross-section.
  • the reservoir 66 is closed at its top by further, horizontally arranged sheets which are welded to the vertical sheets 54 to 61.
  • the areas 63 to 65 form three fixed side walls of the cuboid frame 51, wherein the plates 58, 59 and 60 together with the bottom plate 52 define the interior 13 of the frame 51.
  • the fourth side wall of the frame 51 forms a removable wall 68 inserted between the areas 63 and 65.
  • the frame 51 is closed by another removable wall 69.
  • the leakage losses arising in this way may only be so great that the minimum value p min required in the interior 13 for the type of protection overpressure "p" can still be set.
  • the walls 68 and 69 can, if necessary, for.
  • the valve assembly 38 is disposed in an outlet opening 71 in the wall 69.
  • the valve arrangement 38 is designed as a flutter valve.
  • a rotatably mounted about a horizontal axis 72 plate 73, which serves as a valve blade of the flutter valve closes in its rest position due to their weight, the outlet port 71.
  • Increases the pressure p sp in the interior 13 the plate 73 rotates according to the force acting on it about the axis 72 and releases the outlet port 71 until the pressure p sp is equal to the weight of the plate 73 divided by the pressure applied by the pressure p sp surface of the plate 73.
  • the opening angle of the plate 73 determines the size of the outlet cross section of the outlet opening 71.
  • the outlet opening 71 and the plate 73 are dimensioned so that adjusts the balance of power for the value p max0 .
  • a grille 75 surrounds the pivoting area of the plate 73 and prevents foreign matter from entering the valve assembly 38 and affecting the function of the valve assembly 38.
  • the electric motor 16 is held on the bottom plate 52 with four damping elements, of which only two damping elements 77, 78 are visible in FIG.
  • the connecting piece 32 in the region of the supply channel 31 merges into the intake passage 33, is held on the wall 69.
  • the intake passage 33 is in an advantageous manner - as well as the connecting piece 32 - held on the wall 69.
  • the intake passage 33 is provided with a series of openings which distribute the supplied air flow Q i so that the first partial flow Q 1 is supplied to the cooling air inlet 36 of the electric motor 16 and that the second partial flow Q 2 into a plurality of partial flows Q 21 , Q 22 , Q 23 is divided, which flow through the interior 13 and then leave together with the exiting from the electric motor 16 partial flow Q 1, the interior 13 via the valve assembly 38.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Braking Systems And Boosters (AREA)
EP04020525A 2003-09-09 2004-08-30 Groupe hydraulique avec un réservoir pour liquide hydraulique et une unité motopompe Expired - Lifetime EP1515041B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10341425A DE10341425A1 (de) 2003-09-09 2003-09-09 Hydraulikaggregat mit einem Vorratsbehälter für Hydraulik-Flüssigkeit und mit einer Motor-Pumpe-Einheit
DE10341425 2003-09-09

Publications (2)

Publication Number Publication Date
EP1515041A1 true EP1515041A1 (fr) 2005-03-16
EP1515041B1 EP1515041B1 (fr) 2009-11-25

Family

ID=34129701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04020525A Expired - Lifetime EP1515041B1 (fr) 2003-09-09 2004-08-30 Groupe hydraulique avec un réservoir pour liquide hydraulique et une unité motopompe

Country Status (3)

Country Link
EP (1) EP1515041B1 (fr)
AT (1) ATE449910T1 (fr)
DE (2) DE10341425A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004061366A1 (de) * 2004-12-21 2006-07-06 Ksb Aktiengesellschaft Explosionsschutz für ein nichtelektrisches Gerät
EP2101061A1 (fr) 2008-03-15 2009-09-16 Hoerbiger Automatisierungstechnik Holding GmbH Système hydromécanique
CN102639344A (zh) * 2009-12-01 2012-08-15 罗伯特·博世有限公司 用于维护车辆中的冷却系统的方法和装置
CN114294199A (zh) * 2021-12-28 2022-04-08 潘世群 爆炸性气体环境下一体化泵站

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB153912A (en) * 1914-11-06 1921-10-13 Josef Muchka Improvements in and relating to the storage and drawing off of highly inflammable liquids
US4183982A (en) * 1977-05-09 1980-01-15 Balzers Aktiengesellschaft Fur Hochvakuumtechnik Und Dunne Schichten Fluid protective wall cover in a vapor deposition chamber
DE3010689A1 (de) 1980-03-20 1981-09-24 Brunn GmbH & Co KG, 5300 Bonn Gekapseltes maschinenaggregat
EP0220512A1 (fr) 1985-10-08 1987-05-06 Hoechst Aktiengesellschaft Procédé pour actionner des installations hydrauliques avec des fluides à base de glycols
EP0424206A2 (fr) 1989-10-06 1991-04-24 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Enceinte pressurisée protégée contre les explosions
US5336064A (en) 1993-12-06 1994-08-09 Westinghouse Electric Corporation Electric motor driven pump
DE4337131A1 (de) 1993-02-02 1994-09-08 Rexroth Mannesmann Gmbh Hydraulikaggregat
US6086331A (en) 1995-04-24 2000-07-11 Svanehoj International A/S Safety pumping system for hazardous environments using pressurized gas in a plurality of chambers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4224659C1 (de) * 1992-07-25 1993-11-11 Knapp Mikrohydraulik Gmbh Elektrohydraulisches Antriebssystem für Geräte zur Personen- oder Patientenlagerung
DE19612582A1 (de) * 1996-03-29 1997-10-02 Miag Fahrzeugbau Gmbh Antriebseinheit für ein Fahrzeug

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB153912A (en) * 1914-11-06 1921-10-13 Josef Muchka Improvements in and relating to the storage and drawing off of highly inflammable liquids
US4183982A (en) * 1977-05-09 1980-01-15 Balzers Aktiengesellschaft Fur Hochvakuumtechnik Und Dunne Schichten Fluid protective wall cover in a vapor deposition chamber
DE3010689A1 (de) 1980-03-20 1981-09-24 Brunn GmbH & Co KG, 5300 Bonn Gekapseltes maschinenaggregat
EP0220512A1 (fr) 1985-10-08 1987-05-06 Hoechst Aktiengesellschaft Procédé pour actionner des installations hydrauliques avec des fluides à base de glycols
EP0424206A2 (fr) 1989-10-06 1991-04-24 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Enceinte pressurisée protégée contre les explosions
DE4337131A1 (de) 1993-02-02 1994-09-08 Rexroth Mannesmann Gmbh Hydraulikaggregat
US5336064A (en) 1993-12-06 1994-08-09 Westinghouse Electric Corporation Electric motor driven pump
US6086331A (en) 1995-04-24 2000-07-11 Svanehoj International A/S Safety pumping system for hazardous environments using pressurized gas in a plurality of chambers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004061366A1 (de) * 2004-12-21 2006-07-06 Ksb Aktiengesellschaft Explosionsschutz für ein nichtelektrisches Gerät
EP1674732A3 (fr) * 2004-12-21 2009-05-27 KSB Aktiengesellschaft Dispositif de prévention contre une explosion pour appareil non électrique
EP2101061A1 (fr) 2008-03-15 2009-09-16 Hoerbiger Automatisierungstechnik Holding GmbH Système hydromécanique
DE102008014539A1 (de) 2008-03-15 2009-09-17 Hoerbiger Automatisierungstechnik Holding Gmbh Hydromechanisches System
CN102639344A (zh) * 2009-12-01 2012-08-15 罗伯特·博世有限公司 用于维护车辆中的冷却系统的方法和装置
US8955341B2 (en) 2009-12-01 2015-02-17 Mahle Clevite Inc. Method and equipment for servicing cooling systems in vehicles
CN102639344B (zh) * 2009-12-01 2015-11-25 罗伯特·博世有限公司 用于维护车辆中的冷却系统的方法和装置
US9863676B2 (en) 2009-12-01 2018-01-09 Mahle International Gmbh Method and equipment for servicing cooling systems in vehicles
CN114294199A (zh) * 2021-12-28 2022-04-08 潘世群 爆炸性气体环境下一体化泵站

Also Published As

Publication number Publication date
EP1515041B1 (fr) 2009-11-25
DE10341425A1 (de) 2005-03-31
DE502004010413D1 (de) 2010-01-07
ATE449910T1 (de) 2009-12-15

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