EP1979618B1 - Groupe de compresseurs à vis à plusieurs étages - Google Patents

Groupe de compresseurs à vis à plusieurs étages Download PDF

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Publication number
EP1979618B1
EP1979618B1 EP06754261.3A EP06754261A EP1979618B1 EP 1979618 B1 EP1979618 B1 EP 1979618B1 EP 06754261 A EP06754261 A EP 06754261A EP 1979618 B1 EP1979618 B1 EP 1979618B1
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EP
European Patent Office
Prior art keywords
drive gear
screw compressor
screw
compressor
gear
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.)
Active
Application number
EP06754261.3A
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German (de)
English (en)
Other versions
EP1979618A1 (fr
Inventor
Carsten Achtelik
Dieter HÜTTERMANN
Michael Besseling
Norbert Henning
Jürgen BRINGMANN
Robert Lewis Oppenheim
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.)
GHH Rand Schraubenkompressoren GmbH
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GHH Rand Schraubenkompressoren GmbH
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Publication of EP1979618A1 publication Critical patent/EP1979618A1/fr
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Publication of EP1979618B1 publication Critical patent/EP1979618B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2220/00—Application
    • F04C2220/40—Pumps with means for venting areas other than the working chamber, e.g. bearings, gear chambers, shaft seals

Definitions

  • the invention relates to a multi-stage screw compressor unit. It is preferably a dry-running screw compressor unit for high pressures, typically 40 bar and more. A preferred field of application is the production of compressed air for the blow molding of plastic bottles.
  • US-A-3,407,996 (corresponding DE-A-1628201 ) is a two-stage screw compressor known. It has a gearbox housing with a vertical mounting wall, on which two compressor stages are mounted cantilevered parallel to each other side by side. Each compressor stage includes a screw compressor with two intermeshing screw rotors. In the transmission housing is a gear with a drive gear, which is in engagement with two driven gears for the rotation of the rotors of the two screw compressors.
  • the document also states that the invention described therein can also be applied to multi-stage compressor units with more than two stages. How other compressor stages can be arranged, but is not specified, and in the concretely described construction is no place for other compressor stages.
  • a two-stage screw compressor unit of a similar kind is also out DE 299 22 878.9 U1 known. Also of interest are the screw compressor units described in the documents JP61-4889 . US-A-4,068,984 such as US-A-4,076,468 and EP 0582185 A1 are disclosed.
  • the invention has for its object to provide a three-stage screw compressor unit, the compressed gaseous fluid, in particular compressed air at a very high pressure, typically about 40 bar and more, can deliver and which is characterized by space-saving, simple and robust design.
  • the three-stage screw compressor unit according to the invention allow a simple change of the drive ratio and the speed ratio of the three compressor stages.
  • the screw compressor assembly according to the invention can gaseous fluid, in particular air, using only three compressor stages with a very high pressure ratio of e.g. 40: 1 and thus compressed air under high pressure, as used for industrial manufacturing operations, e.g. the blow molding of plastic bottles, needed, will be delivered.
  • the first and second stage forming screw compressors are arranged above the axis of rotation of the drive gear extending horizontal plane, while the screw compressor of the third stage below the screw compressors of the first and second stage and arranged below the plane passing through the axis of rotation of the drive gear horizontal plane and its driven gear meshes with the drive gear near its lowest point.
  • FIG. 1 shows in perspective a three-stage screw compressor unit with three screw compressors 60, 70, 80, which are flanged parallel to each other on a gear housing 90, which has the shape of a vertical disk substantially cantilevered.
  • a gear housing 90 which has the shape of a vertical disk substantially cantilevered.
  • the housing of each screw compressor 60, 70, 80 at its end facing the gear housing 90, a flange 64, 74 and 84, which is connected by screws with a mating flange of the gear housing 90.
  • the three screw compressors 60, 70, 80 are driven together by a transmission gear 90 mounted in the engine and driven by a drive gear, as will be explained in more detail.
  • the screw compressor 60 is the inlet stage (low pressure stage) with suction port 61 and outlet port 63
  • the screw compressor 70 is the second stage or intermediate pressure stage with inlet port 71 and outlet port 73
  • the screw compressor 80 is the final stage or high pressure stage with inlet port 81 and one in FIG. 1 invisible outlet opening on the side remote from the inlet opening 81 side.
  • FIG. 1 further shows an oil sump housing 76 flanged to the foot of the transmission housing 90, which is driven by oil lines 77 with the synchronized gears the screw compressors 60, 70, 80 and is connected to the arranged in the gear housing 90 drive gear.
  • FIG. 1 not shown are the inlets and outlets of the three screw compressors 60, 70, 80 interconnecting connecting lines for the medium to be compressed, in particular air. These are formed in a manner known to those skilled in the art and can, for. B. be equipped with filters, intercoolers and / or silencers.
  • the first and second stage screw compressors 60, 70 are arranged horizontally side by side while the third stage screw compressor 80 is located below the first and second stage screw compressors.
  • the oil sump housing 76 has at its top a recess 79 which provides additional space for housing the third stage screw compressor.
  • Each of the three screw compressors 60, 70, 80 from Fig. 1 has in the usual way two rotors, which are rotatably mounted parallel axis in a rotor housing and engage with helical ribs and grooves.
  • Fig. 2 the third stage of the three-stage compressor unit of Fig. 1 forming screw compressor 80, which is designed for particularly high pressures of preferably about 40 bar and more.
  • the in FIG. 2 shown screw compressor has a (shown in longitudinal section) rotor housing 1, in which two rotors 3 and 5 are mounted rotatably parallel axis.
  • the axes of rotation of the rotors 3, 5 lie in a common vertical plane.
  • Each rotor 3, 5 has a profile section 7 or 9, which has a profile with helically extending ribs or grooves, wherein the ribs and grooves of the two profile sections 7, 9 intermesh and sealingly engage each other.
  • At the profile sections 7, 9 close to both sides shaft journals 7a, 7b, 9a, 9b, with the peripheral surface seal assemblies 11, 12 cooperate to seal the rotor in the rotor housing 1.
  • the shaft journals 7a, 7b, 9a, 9b are also rotatably supported by bearings 13, 15 in the rotor housing 1.
  • the in FIG. 2 upper rotor 3 is the main rotor and has at its in FIG. 2 left end of an elongated shaft journal 7c, in the transmission housing 90 ( Fig. 1 protrudes there and carries a gear 85 which is in engagement with a transmission gear arranged in the gear housing to drive the rotor 3 for rotation.
  • the two rotors 3, 5, two intermeshing gears 17, 19 which form a synchronizing (Gleichlaufgetriebe), which transmits the rotation of the upper rotor 3 to the lower rotor 5, which is the Mauillonr, in the desired speed ratio, and ensures that the profile sections 7, 9 of the rotors 3, 5 engage without contact.
  • the rotor housing 1 is surrounded by a cooling jacket or cooling housing 21, which is formed predominantly in one piece with the rotor housing 1 and surrounds this at a distance.
  • the cooling housing 21 has large-area openings, which are closed by means of a cover plate 23 and a bottom plate 25, which are fastened by screws.
  • a cooling space 27 annularly surrounding the rotor housing 1, in which a liquid coolant, e.g. Water, circulates.
  • FIG. 2 shown screw compressor of the third stage, as well as the screw compressors 60, 70 of the first and second stage, a so-called dry runner, ie its compression space is kept oil-free.
  • Oil from the oil sump 76 which is circulated by an (not shown) oil pump, is only for the lubrication of the drive gear (gears 65, 75, 85, 95) and the bearings 13, 15 and the constant velocity gear (17, 19) of each of Screw compressors 60, 70, 80 (see 17, 19 in Fig. 2 ), but does not get into the compression space of the screw compressors.
  • a flange plate 84 which serves for fastening the screw compressor to the mounting wall 91 of the gear housing and for this purpose has holes for fastening screws.
  • Compressor unit shown at the inlet 61 of the first compressor stage 60 When operating the in Fig. 1 Compressor unit shown at the inlet 61 of the first compressor stage 60 sucked air from this to a pressure in the range of 3 to 6 bar, preferably about 3.5 bar, compressed and then from the second compressor stage 70 to an intermediate pressure in the range of 10 to 15 bar, preferably about 12 bar, compressed.
  • This precompressed air passes from the outlet 73 of the second stage 70 via a (not shown) connecting line to the inlet 81 of the third compressor stage 80 and is compressed in this to a final pressure in the range of 30 to 50 bar, preferably about 40 bar.
  • the pressure ratios in each of the three screw compressors 60, 70, 80 are approximately equal.
  • Fig. 3 shows in perspective, partially in section, the gear housing 90 with the gear arranged therein for driving the three screw compressors 60, 70, 80.
  • the gear housing 90 has on its one side a vertical mounting wall 91 to which the housing of the three compressor screws of the compressors 60th , 70, 80 (in Fig. 3 not shown) are fastened with Flanschverschraubungen.
  • the gear housing 90 is closed by a bearing cap 92, in which by means of a bearing ring 93, a drive shaft 94 is mounted, which carries a drive gear 95.
  • the projecting beyond the drive gear 95 end of the drive shaft 94 is in a bearing cup used in the mounting wall 91 (see Fig. 5 ) stored.
  • the drive gear 95 is engaged with three driven gears 65, 75, 85 distributed around the circumference of the drive gear 95 and associated with the three screw compressors 60, 70 for driving them.
  • Each of the driven gears 65, 75, 85 is seated on a rotor shaft journal of one of the three screw compressors 60, 70, 80 projecting through a corresponding opening in the mounting wall 91 into the gear housing 90.
  • Fig. 4 the arrangement of the three driven gears 65, 75, 85 with respect to the drive gear 95 is shown.
  • the driven gears 65, 75 of the screw compressors 60 or 70 of the first and second stages are located above the plane passing through the axis of rotation A of the drive gear 95 horizontal plane BB.
  • the driven gear 85 of the third stage screw compressor 80 is well below the horizontal plane BB passing through the axis A, preferably near the lowest point T of the drive gear 95.
  • the drive gear 65 for the first compressor stage is arranged to in that a straight line C connecting its axis 65 'to the axis A of the drive gear 95 encloses an angle ⁇ of not more than 30 ° with the horizontal straight line BB passing through the axis A of the drive gear 95.
  • the corresponding angle ⁇ is preferably not more than 20 °.
  • the driven gear 85 of the third compressor stage 80 is disposed so close to the lowest point T of the drive gear 95 that a line D connecting the axis of the driven gear 85 with the rotational axis A of the drive gear 95 with the vertical plane passing through the axis A of the drive gear 95 an angle ⁇ of not more than 20 °.
  • Fig. 5 shows a view of the mounting wall 91 of the gear housing 90. This is shown cut out in the upper area to show the drive gear behind arranged 95, which with the driven gears 65, 75, 85 of the three screw compressors 60, 70, 80 (in Fig. 5 omitted) is engaged.
  • the mounting wall 91 has openings 68, 78, 88, through which the gear wheels 65, 75, 85 bearing shaft journals (see 7b in Fig. 2 ) of the screw compressors 60, 70, 80 may enter the transmission housing 90.
  • the mounting wall 91 has rib-like raised, the openings 68, 78, 88 surrounding counter flanges 69, 79, 89, where the flanges 64, 74, 84 of the compressors 60, 70, 80 (see. Fig. 1 ) are fastened by means of screws and suitable seals.
  • a bearing cup 97 is used, in which the end of the drive gear 95 supporting drive shaft 94 (see Fig. 3 ) is stored.
  • Both the storage pot 97 and the in Fig. 3 shown bearing ring 93 for supporting the drive shaft 94 are formed eccentrically.
  • the third-stage screw compressor 80 is detachably connected to the rotor housing 21 thereof by means of screws and can be exchanged for a flange plate with a changed hole pattern, whereby the position of the screw compressor 80 and thus its driven gear 85 can be changed vertically, as by the vertical double-headed arrow 86 in Fig. 5 indicated.
  • This possibility of adjustment of the drive gear 95 in the horizontal direction 98 and the driven gear of the third stage in the vertical direction 86 allows the use of different sets of gear wheels forming the gear 95, 65, 75, 85, wherein by different, matched diameter the drive ratio in total and also the relative rotational speeds of the three compressor stages 60, 70, 80 can be changed.
  • all four gear forming gears 65, 75, 85, 95 are exchanged for such other diameter, wherein an adjustment of only two of these elements in two mutually perpendicular directions, namely the drive gear 95 in the horizontal direction 98 and the gear 85 of the third stage in the vertical direction 86, sufficient to ensure the proper engagement of the gears even with changed diameter ratios.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Supercharger (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)

Claims (9)

  1. Groupe de compresseurs à vis à plusieurs étages,
    avec un carter de transmission (90),
    une roue dentée d'entraînement (95) disposée dans le carter de transmission,
    et un premier, un deuxième et un troisième compresseur à vis (60, 70, 80) qui sont fixés au carter de transmission et couplés à la roue dentée d'entraînement de façon à ce qu'ils soient entraînés tous ensemble par la roue dentée d'entraînement,
    lors du fonctionnement, le premier compresseur à vis (60) comprimant un écoulement d'un fluide gazeux d'une pression d'admission à une première pression intermédiaire, le deuxième compresseur à vis (70) comprimant l'écoulement du fluide de la première pression intermédiaire à une deuxième pression intermédiaire et le troisième compresseur à vis comprimant l'écoulement du fluide de la deuxième pression intermédiaire à une pression finale, la pression finale représentant au moins trente fois, de préférence au moins environ quarante fois la pression d'admission,
    le carter de transmission (90) comprenant une paroi de montage perpendiculaire (91),
    un arbre d'entraînement (94), logé de manière rotative autour d'un axe horizontal dans le carter de transmission, supportant une roue dentée d'entraînement (95),
    et les compresseurs à vis (60, 70, 80) sont fixés sur la paroi de montage (91) en porte-à-faux et parallèlement entre eux et chacun d'eux comprend deux rotors à vis (3, 5), parallèles à l'axe, s'engrenant entre eux avec des nervures et des rainures en forme de vis et, au niveau de ces rotors, un tourillon d'arbre (7c), qui dépasse, par une ouverture dans la paroi de montage (91), dans le carter de transmission (90) et supporte une roue dentée entraînée (65, 75, 85) qui s'engrène avec la roue dentée d'entraînement (95),
    les roues dentées entraînées (65, 75) de deux compresseurs à vis, qui constituent les premier et deuxième étages du groupe de compresseurs, étant engrenées avec la roue dentée d'entraînement (95) à des endroits qui se trouvent au-dessus du plan horizontal s'étendant à travers l'axe de rotation (A) de la roue dentée d'entraînement
    et le troisième compresseur à vis (80) étant disposé en dessous du premier et du deuxième compresseur à vis (60, 70) et sa roue dentée entraînée (85) étant engrenée avec la roue dentée d'entraînement (95) à un endroit qui se trouve près du point (T) le plus bas de la circonférence de la roue dentée d'entraînement (95).
  2. Groupe de compresseurs à vis selon la revendication 1, caractérisé en ce que la pression d'admission est d'environ 1 bar, la première pression intermédiaire de 2 à 6 bar, de préférence d'environ 3,5 bar, la deuxième pression intermédiaire de 10 à 15 bar, de préférence d'environ 12 bar et la pression finale de 30 à 50 bar, de préférence d'environ 40 bar.
  3. Groupe de compresseurs à vis selon la revendication 1 ou 2, caractérisé en ce que le premier, le deuxième et le troisième compresseur à vis (60, 70, 80) sont des compresseurs à vis fonctionnant à sec.
  4. Groupe de compresseurs à vis selon la revendication 1, caractérisé en ce qu'un plan (C) passant par l'axe de rotation de la roue d'entraînement (95) et de la roue dentée entraînée (65) du premier compresseur à vis forme, avec le plan horizontal (B-B) passant par l'axe de rotation (A) de la roue d'entraînement (95), un angle (α) non supérieur à 30°.
  5. Groupe de compresseurs à vis selon la revendication 1, caractérisé en ce qu'un plan (C) passant par l'axe de rotation de la roue d'entraînement (95) et de la roue dentée entraînée (75) du deuxième compresseur à vis forme, avec le plan horizontal (B-B) passant par l'axe de rotation (A) de la roue d'entraînement (95), un angle (β) non supérieur à 20°.
  6. Groupe de compresseurs à vis selon la revendication 1, caractérisé en ce qu'un plan passant par l'axe de rotation de la roue d'entraînement (95) et de la roue dentée entraînée (85) du troisième compresseur à vis forme, avec le plan vertical passant par l'axe de rotation (A) de la roue d'entraînement (95), un angle (γ) non inférieur à 30°, de préférence inférieur à 20°.
  7. Groupe de compresseurs à vis selon l'une des revendications 1 à 6, caractérisé en ce que l'arbre d'entraînement (94) supportant la roue dentée d'entraînement (95) est logé, au moyen de pièces de paliers interchangeables (93, 97) qui présentent des excentricités différentes dans la direction horizontale, de façon à ce que, le remplacement des pièces de paliers permet de régler la position de l'axe de rotation de l'arbre d'entraînement (94) dans le carter de transmission (90) globalement dans la direction horizontale (98).
  8. Groupe de compresseurs à vis selon l'une des revendications 1 à 7, caractérisé en ce que le troisième compresseur à vis (80) est fixé à la paroi de montage (91) au moyen de pièces de bridage (84) interchangeables de façon à ce que le remplacement des pièces de bridage (84) permet de modifier la position du troisième compresseur à vis (80) par rapport au carter de transmission (91) globalement dans la direction verticale (86).
  9. Groupe de compresseurs à vis selon les revendications 7 et 8, caractérisé en ce que pour la modification du rapport entre les vitesses de rotation des compresseurs à vis (60, 70, 80) du groupe de compresseurs, des ensembles de roues interchangeables sont disponibles, constitués chacun d'une roue dentée d'entraînement (95) et de roues dentées entraînées (65, 75, 85) de différents diamètres, ainsi que de pièces de paliers (93, 97) et de pièces de bridage (84) correspondantes, pour un réglage, adapté aux différents diamètres des roues dentées, de la position de la roue dentée d'entraînement (95) dans la direction horizontale (98) et de la roue dentée entraînée (85) du troisième compresseur à vis dans la direction verticale (86).
EP06754261.3A 2005-12-08 2006-06-09 Groupe de compresseurs à vis à plusieurs étages Active EP1979618B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005058698 2005-12-08
PCT/EP2006/005558 WO2007065486A1 (fr) 2005-12-08 2006-06-09 Groupe de compresseurs à vis à plusieurs étages

Publications (2)

Publication Number Publication Date
EP1979618A1 EP1979618A1 (fr) 2008-10-15
EP1979618B1 true EP1979618B1 (fr) 2016-04-27

Family

ID=36763690

Family Applications (4)

Application Number Title Priority Date Filing Date
EP06762002A Active EP1957798B1 (fr) 2005-12-08 2006-06-09 Compresseur à vis
EP06754260.5A Active EP1957797B1 (fr) 2005-12-08 2006-06-09 Compresseur à vis pourvu d'une chemise de refroidissement
EP06754262A Withdrawn EP1957799A1 (fr) 2005-12-08 2006-06-09 Compresseur à vis
EP06754261.3A Active EP1979618B1 (fr) 2005-12-08 2006-06-09 Groupe de compresseurs à vis à plusieurs étages

Family Applications Before (3)

Application Number Title Priority Date Filing Date
EP06762002A Active EP1957798B1 (fr) 2005-12-08 2006-06-09 Compresseur à vis
EP06754260.5A Active EP1957797B1 (fr) 2005-12-08 2006-06-09 Compresseur à vis pourvu d'une chemise de refroidissement
EP06754262A Withdrawn EP1957799A1 (fr) 2005-12-08 2006-06-09 Compresseur à vis

Country Status (8)

Country Link
US (4) US7690901B2 (fr)
EP (4) EP1957798B1 (fr)
CN (2) CN101321954B (fr)
AT (1) ATE498071T1 (fr)
DE (1) DE502006008894D1 (fr)
ES (1) ES2359015T3 (fr)
HK (1) HK1127111A1 (fr)
WO (4) WO2007065486A1 (fr)

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DE102009019220B4 (de) * 2009-04-30 2013-04-11 Leistritz Pumpen Gmbh Schraubenspindelpumpe
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US9803639B2 (en) * 2014-12-19 2017-10-31 Ghh-Rand Schraubenkompressoren Gmbh Sectional sealing system for rotary screw compressor
DE102014019117B4 (de) * 2014-12-19 2022-02-24 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Druckluftversorgungseinrichtung für Fahrzeug-Druckluftanlagen mit wenigstens einem Gehäuse aus Kunststoff
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EP1979618A1 (fr) 2008-10-15
CN101321954A (zh) 2008-12-10
US7690901B2 (en) 2010-04-06
CN101321954B (zh) 2012-06-13
WO2007065485A1 (fr) 2007-06-14
US9091268B2 (en) 2015-07-28
EP1957799A1 (fr) 2008-08-20
WO2007065487A1 (fr) 2007-06-14
US7713039B2 (en) 2010-05-11
US20130011285A1 (en) 2013-01-10
ES2359015T3 (es) 2011-05-17
WO2007065486A1 (fr) 2007-06-14
EP1957798A1 (fr) 2008-08-20
EP1957797B1 (fr) 2016-09-28
HK1127111A1 (en) 2009-09-18
DE502006008894D1 (de) 2011-03-24
ATE498071T1 (de) 2011-02-15
US20080286138A1 (en) 2008-11-20
US20080286129A1 (en) 2008-11-20
EP1957798B1 (fr) 2011-02-09
US20090004036A1 (en) 2009-01-01
EP1957797A1 (fr) 2008-08-20
CN101321955A (zh) 2008-12-10
WO2007065484A1 (fr) 2007-06-14

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