EP1515041B1 - 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 PDFInfo
- Publication number
- EP1515041B1 EP1515041B1 EP04020525A EP04020525A EP1515041B1 EP 1515041 B1 EP1515041 B1 EP 1515041B1 EP 04020525 A EP04020525 A EP 04020525A EP 04020525 A EP04020525 A EP 04020525A EP 1515041 B1 EP1515041 B1 EP 1515041B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fact
- power unit
- hydraulic power
- interior space
- unit according
- 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.)
- Expired - Lifetime
Links
- 239000007788 liquid Substances 0.000 title description 2
- 230000001681 protective effect Effects 0.000 claims description 23
- 239000012530 fluid Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 claims 1
- 238000004880 explosion Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 239000003570 air Substances 0.000 description 10
- 239000002360 explosive Substances 0.000 description 10
- 101100083446 Danio rerio plekhh1 gene Proteins 0.000 description 8
- 238000005538 encapsulation Methods 0.000 description 7
- 238000013016 damping Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 231100001261 hazardous Toxicity 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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
- 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 a motor-pump unit formed by a motor and a pump driven by this.
- hydraulic units are manufactured for various applications in various embodiments.
- the hydraulic units can in addition to the reservoir and the motor-pump unit with other components such.
- hydraulic units are known in which a number of measures are provided for damping the noise emitted by the motor-pump unit sound.
- An electrically driven delivery unit for highly flammable liquids is in the US-A-6,086,331 specified.
- An electric motor is arranged with its housing within an additional casing.
- the shaft of the motor is led out of the casing via a seal.
- the shaft drives a pump located outside the casing.
- the jacket and the motor housing of the electric motor are flushed by a protective gas.
- a similar delivery unit shows the US 5,336,064 A ,
- the font DE 30 10 689 A1 proposes to supply aggregates - including motor-pump units - with encapsulation, which in addition to the sound insulation also has another function. For all machine units disclosed in the document, it is proposed to hermetically encapsulate them and to produce a protective gas atmosphere in the interior. The resulting waste heat should be dissipated via cooling surfaces.
- the DE 43 37 131 A1 proposes to arrange a motor-pump unit in a frame to achieve soundproofing.
- a part of the frame is formed by a tank container.
- the EP 0 220 512 A1 shows an open hydraulic circuit in which the hydraulic fluid in the tank is covered with an inert gas filling. Neither the pump nor an associated engine are encapsulated.
- the font EP 0 424 206 A2 discloses to dispose various electric motors within an airtight housing.
- Protective gas can be supplied to the housing from a protective gas source.
- the outlet is controlled by two switching valves.
- Volume flow sensors measure the amount of gas at the outlet.
- the switching valves are opened and protective gas supplied via a regulator. After the sensors confirm that sufficient shielding gas has been supplied, the valves are closed to hold the inert gas atmosphere. Excessive leakage is detected by pressure sensors.
- B. hydraulic pumps With hydraulic pumps, there is the risk, among other things, that in the event of bearing damage, overheating occurs in the area of the bearings, with the heated surface acting as a dangerous ignition source. Nevertheless, to be able to use hydraulic pumps in potentially explosive areas, other measures must be taken. One possibility for this is z. B.
- the invention has for its object to provide a hydraulic unit of the type mentioned, which can be used according to the requirements of Atex Directive 94/9 / EC in hazardous areas. This should in particular be ensured that the heated by a bearing damage surface of the pump does not trigger the ignition of an explosive atmosphere.
- the invention makes use of the type of protection overpressure encapsulation "p".
- the invention makes it possible to arrange additional components in the interior of the frame closed on all sides in addition to the hydraulic unit. Since these components are also surrounded by protective gas, they need not meet the requirements of the Atex directive, so that inexpensive series versions of this Components can be used.
- the inventively designed hydraulic unit from the outside electrical energy and the protective gas are supplied. If the valves controlling the hydraulic pressure medium are also arranged in the interior of the frame, only the hydraulic lines leading to the consumers need to be led out of the frame.
- the features of subclaim 2 relate to the limitation of the pressure of the protective gas in the interior of the frame to an upper value. By these measures, the forces acting on the walls of the frame forces are limited, so that keeps the design effort for holding the walls of the frame within reasonable limits.
- the claims 3 to 6 relate to the monitoring of the pressure in the 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 at least necessary value for the type of protection overpressure "p" appropriate measures can be taken that z. B. in such a case, the power supply to all modules of the hydraulic unit is immediately suppressed.
- the features of claims 7 to 14 relate to the structural design of the frame and the supply and 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 a set up in the building 10, also shown only schematically hydraulic unit 11 according to the invention.
- the hydraulic unit 11 is enclosed by a frame 12 closed on all sides.
- 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 a driven by the electric motor 16 pump 17.
- the pump 17 delivers hydraulic pressure fluid from a reservoir 20 via hydraulic lines 21, 22, 23 to a in the FIG. 1 hydraulic load, not shown, which is located outside of the frame 12.
- the consumer may be z. B. to act a hydraulic cylinder or a hydraulic motor. From the consumer, the pressure medium flows via a further line 25 back to the reservoir 20.
- a arranged in the interior 13 valve 27 controls the pressure medium supplied to the consumer.
- 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 described.
- 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 becomes redundant for safety reasons detected.
- 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 influenced in terms of a safe operating condition.
- FIG. 2 and 3 show a second formed according to the invention hydraulic unit 50 with a cuboid frame 51. Components that match those of the in the FIG. 1 match shown hydraulic unit 11 are provided with the same reference numerals.
- the FIG. 2 shows one of the illustration in the FIG. 1 corresponding side view while the FIG. 3 a plan view of the hydraulic unit 50 shows.
- 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, z.
- 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 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 provided with four damping elements, of which in the FIG. 2 only two damping elements 77, 78 are visible, held on the bottom plate 52.
- 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)
Claims (14)
- Centrale hydraulique dotée d'un réservoir de fluide hydraulique et dotée d'une groupe moto-pompe constitué d'un moteur et d'une pompe entraînée par celui-ci,
cependant que le groupe (15) moto-pompe est disposé dans la chambre (13) intérieure d'un bâti (12 ; 51) fermé de tous côtés,
la chambre (13) intérieure est constamment alimentée en gaz de protection,
le gaz de protection est guidé dans la chambre (13) intérieure, de façon à circuler librement autour de toutes les unités (15, 27, 40, 41, 43) constructives qui y sont disposées, et
la quantité (Qi) de gaz de protection, qui est apportée dans la chambre (13) intérieure, est choisie au moins suffisamment grande pour que règne, dans la chambre (13) intérieure, une surpression par rapport à la pression atmosphérique, qui règne à l'extérieur du bâti (12 ; 51),
caractérisée en ce que
une cloison (69) du bâti (12 ; 51) est dotée d'un orifice (71) d'évacuation pouvant être refermé par un dispositif (38) de valve à commande par pression et que le dispositif (38) de valve est conçu de façon à agrandir la section transversale d'évacuation lorsque la pression (psp) régnant dans la chambre (13) intérieure dépasse une valeur (pmaxo) donnée en consigne, afin de limiter la pression (psp) régnant dans la chambre (13) intérieure à la valeur (pmax0) donnée en consigne. - Centrale hydraulique selon la revendication n° 1, caractérisée en ce que le dispositif (38) de valve est conçu sous forme de valve à battant, dotée d'un battant de valve constitué d'une plaque (73) fixée de façon à pouvoir effectuer une rotation.
- Centrale hydraulique selon la revendication n° 1 ou n° 2, caractérisée en ce que le signal (up1) de sortie d'un capteur (40) de pression est ramené à un dispositif (43) de commutation électrique, qui évalue le signal de sortie et qui forme un signal approprié, si la pression régnant dans la chambre (13) intérieure est inférieure à une première pression (pmin) et/ou si la pression est supérieure à une deuxième pression (pmax1).
- Centrale hydraulique selon la revendication n° 3, caractérisée en ce que le signal de sortie d'un deuxième capteur (41) de pression disposé dans la chambre (13) intérieure est ramené vers le dispositif (43) de commutation électrique, que le dispositif (43) de commutation évalue le signal de sortie et forme un signal approprié, si la pression est inférieure à la première pression (pmin).
- Centrale hydraulique selon la revendication n° 3 ou la revendication n° 4, caractérisée en ce que, en cas de danger, le dispositif (43) de commutation coupe l'alimentation en énergie électrique vers les unités constructives disposées dans la chambre (13) intérieure.
- Centrale hydraulique selon une des revendications n° 3 à n° 5, caractérisée en ce que le dispositif (43) de commutation forme un signal, qui commande l'alimentation en gaz de protection.
- Centrale hydraulique selon une des revendications précédentes, caractérisée en ce que le bâti (51) est conçu sous forme de parallélépipède, que le réservoir (66) est maintenu au niveau d'une plaque (52) de fond et que le réservoir (66) est conçu de façon à former au moins deux des cloisons (63, 64, 65) latérales du bâti (51).
- Centrale hydraulique selon la revendication n° 7, caractérisée en ce que les autres cloisons (68, 69) du bâti (51) sont conçues sous forme de cloisons démontables, pouvant être insérées dans le bâti.
- Centrale hydraulique selon la revendication n° 8, caractérisée en ce que les autres cloisons (68, 69) sont conçues isolantes.
- Centrale hydraulique selon une des revendications précédentes, caractérisée en ce que le moteur (16) est un moteur électrique à refroidissement par air et qu'une partie (Q1) du flux de gaz de protection, correspondant au besoin en fluide de refroidissement de ce moteur (16), est ramenée vers l'entrée (36) d'air de refroidissement du moteur (16).
- Centrale hydraulique selon une des revendications n° 7 à n° 10, caractérisée en ce qu'une cloison (69) du bâti (51) est dotée d'un manchon (32) de raccordement pour un canal (31) d'alimentation, qui permet d'alimenter la chambre (13) intérieure en gaz de protection.
- Centrale hydraulique selon la revendication n° 11, caractérisée en ce que le canal (31) d'alimentation débouche dans un canal (33) d'aspiration, qui est disposé dans la chambre (13) intérieure, et que le canal (33) d'aspiration est conçu de façon à ramener un premier flux (Q1) partiel de gaz de protection vers l'entrée (36) d'air de refroidissement du moteur (16) et à ce qu'un deuxième flux (Q2) partiel parcoure la chambre (13) intérieure de part et d'autre.
- Centrale hydraulique selon la revendication n° 12, caractérisée en ce que le deuxième flux (Q2) partiel se divise en plusieurs flux (Q21, Q22, Q23) partiels.
- Centrale hydraulique selon la revendication n° 12 ou la revendication n° 13, caractérisée en ce que le canal (33) d'aspiration est maintenu contre une cloison (69) du bâti (51).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10341425 | 2003-09-09 | ||
| DE10341425A DE10341425A1 (de) | 2003-09-09 | 2003-09-09 | Hydraulikaggregat mit einem Vorratsbehälter für Hydraulik-Flüssigkeit und mit einer Motor-Pumpe-Einheit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1515041A1 EP1515041A1 (fr) | 2005-03-16 |
| EP1515041B1 true 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004061366A1 (de) * | 2004-12-21 | 2006-07-06 | Ksb Aktiengesellschaft | Explosionsschutz für ein nichtelektrisches Gerät |
| DE102008014539A1 (de) | 2008-03-15 | 2009-09-17 | Hoerbiger Automatisierungstechnik Holding Gmbh | Hydromechanisches System |
| 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 |
| CN114294199B (zh) * | 2021-12-28 | 2025-03-07 | 潘世群 | 爆炸性气体环境下一体化泵站 |
Family Cites Families (10)
| 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 |
| CH621366A5 (fr) * | 1977-05-09 | 1981-01-30 | Balzers Hochvakuum | |
| DE3010689A1 (de) * | 1980-03-20 | 1981-09-24 | Brunn GmbH & Co KG, 5300 Bonn | Gekapseltes maschinenaggregat |
| DE3535839A1 (de) * | 1985-10-08 | 1987-04-09 | Hoechst Ag | Verfahren zum betreiben von hydraulikanlagen mit fluessigkeiten auf der basis von glykolen |
| JPH074792B2 (ja) | 1989-10-06 | 1995-01-25 | 株式会社神戸製鋼所 | 内圧防爆システム |
| DE4224659C1 (de) * | 1992-07-25 | 1993-11-11 | Knapp Mikrohydraulik Gmbh | Elektrohydraulisches Antriebssystem für Geräte zur Personen- oder Patientenlagerung |
| 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 |
| ATE175006T1 (de) | 1995-04-24 | 1999-01-15 | Svanehoj International A S | Sicherheitspumpensystem |
| DE19612582A1 (de) * | 1996-03-29 | 1997-10-02 | Miag Fahrzeugbau Gmbh | Antriebseinheit für ein Fahrzeug |
-
2003
- 2003-09-09 DE DE10341425A patent/DE10341425A1/de not_active Withdrawn
-
2004
- 2004-08-30 AT AT04020525T patent/ATE449910T1/de not_active IP Right Cessation
- 2004-08-30 EP EP04020525A patent/EP1515041B1/fr not_active Expired - Lifetime
- 2004-08-30 DE DE502004010413T patent/DE502004010413D1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE502004010413D1 (de) | 2010-01-07 |
| EP1515041A1 (fr) | 2005-03-16 |
| ATE449910T1 (de) | 2009-12-15 |
| DE10341425A1 (de) | 2005-03-31 |
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