EP2626511B1 - Pompe à vis à broche double dans une construction à double flux - Google Patents

Pompe à vis à broche double dans une construction à double flux Download PDF

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Publication number
EP2626511B1
EP2626511B1 EP13000396.5A EP13000396A EP2626511B1 EP 2626511 B1 EP2626511 B1 EP 2626511B1 EP 13000396 A EP13000396 A EP 13000396A EP 2626511 B1 EP2626511 B1 EP 2626511B1
Authority
EP
European Patent Office
Prior art keywords
section
pump
bearing
seal
spindle
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
EP13000396.5A
Other languages
German (de)
English (en)
Other versions
EP2626511A2 (fr
EP2626511A3 (fr
Inventor
Hans Jung
Weshen Christov
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.)
Jung Geraetebau GmbH and Co
Original Assignee
Jung Geraetebau GmbH and Co
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
Priority claimed from DE201220000893 external-priority patent/DE202012000893U1/de
Priority claimed from DE201220000894 external-priority patent/DE202012000894U1/de
Application filed by Jung Geraetebau GmbH and Co filed Critical Jung Geraetebau GmbH and Co
Publication of EP2626511A2 publication Critical patent/EP2626511A2/fr
Publication of EP2626511A3 publication Critical patent/EP2626511A3/fr
Application granted granted Critical
Publication of EP2626511B1 publication Critical patent/EP2626511B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps 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
    • F04C2/16—Rotary-piston machines or pumps 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
    • F04C2/165—Rotary-piston machines or pumps 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 having more than two rotary pistons with parallel axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C17/00—Arrangements for drive of co-operating members, e.g. for rotary piston and casing
    • F01C17/02—Arrangements for drive of co-operating members, e.g. for rotary piston and casing of toothed-gearing type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • 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
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/52—Bearings for assemblies with supports on both sides
    • 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
    • F04C2240/00—Components
    • F04C2240/60—Shafts
    • F04C2240/601—Shaft flexion

Definitions

  • the invention relates to a double-spindle screw pump in a double flow design with a pump housing which has a pump section, two bearing sections and at least one gear section with at least one gear chamber, the bearing sections and the pump section being designed separately from one another, with a conveyor housing part as a component of the pump section in which Conveyor screws arranged on two shafts with flanks in a double-flow design are provided, the conveyor screws on the shafts having a root diameter, the shafts being mounted on both sides in the bearing sections with bearings (external storage), in the bearing section a seal for sealing the bearing section from the conveying section is provided , and the shafts extend at least on one side into the gear section, with gearwheels arranged on the shafts in the gear section, by means of which the shafts are rotationally coupled
  • Such a pump is out DE 43 16 735 A1 known.
  • the structure of such externally mounted double-flow twin-screw screw pumps is such that the root diameter of the feed screw is larger than the seal diameter and this in turn is larger than the inner diameter of the outer bearing.
  • the shaft is graded accordingly so that the diameter under the outer bearings is significantly smaller than the diameter in the middle of the shaft. The reason for this is that for the installation of the feed screws and the mechanical seals these are pushed over the bearing seats, and this is only easily possible with this structure.
  • a disadvantage of this design is that the shaft has a significantly lower section modulus in the area of the bearings than in the middle of the shaft. This has a negative effect on the deflection of the shaft in the event of load / operation and limits the permissible pressure difference when using the pump, since contact between the delivery screw and the pump housing must be avoided.
  • the object which the invention achieves is therefore to improve the construction of the pump in such a way that the limitation is removed.
  • An exemplary embodiment of the invention provides that a first bushing is provided on at least one shaft side, which is arranged in the region of the seal and has an outer diameter that corresponds to the inner diameter of the seal.
  • a further exemplary embodiment of the invention provides that a bushing is provided on at least one shaft side, which is arranged in the region of the bearing and which has an outer diameter which corresponds to the inner diameter of the bearing.
  • a further exemplary embodiment of the invention provides that the shaft in the region of the bush has an outer diameter which is smaller or the same size as the root diameter and / or the inner diameter of the seal. This makes it particularly easy to install the shafts and to achieve the result provided by the solution according to the invention.
  • a further exemplary embodiment of the invention provides that there is a hydraulic separation between the pump section and the bearing section, preferably via a mechanical seal, and / or that there is a spatial separation between the bearing section and the gear section.
  • a further exemplary embodiment of the invention provides that the shaft is in operative connection with the fastening element arranged to produce a retaining connection between the shaft and the gearwheel, the fastening element and the gearwheel having corresponding bores, via which a holding connection between the gearwheel and the fastening element can be produced via a locking element.
  • the bores in the fastening element are designed such that the gearwheel and the fastening element (and thus the shaft) can be rotated relative to one another, so that a distance between the flanks and the conveyor screws (the flank play of the conveyor screws) can be set.
  • the fastening element has a bushing section for pushing onto the shaft, the bushing section preferably having a receiving section for the gearwheel, and / or wherein the shaft and the bushing section have a groove for receiving a feather key for producing a rotationally effective connection between the shaft and have fastener.
  • the bores in the fastening element are provided as a radial elongated hole, in which the locking element can be moved radially in the inserted but not locked state, and that the radial length of the elongated hole is provided such that its end points are at least in contact with the points of contact the flanks of the feed screws match.
  • the maintenance and adjustability of the spindle pump are improved in that it is possible to adjust the entire backlash of the feed screws by providing the elongated hole. Previously, it was necessary to remove the gear from the shaft, if necessary, and to replace it in a twisted manner in order to be able to set the backlash adequately. This setting effort is significantly reduced.
  • Another exemplary embodiment of the invention provides that the fastening element with the elongated holes is only provided on one shaft. This takes into account the aspect that it has been found that it is sufficient to adjust only one shaft, while the other shaft is constantly mounted.
  • Another exemplary embodiment of the invention provides that the radial length of the elongated holes is longer than the radial distance between the contact points of the flanks of the conveyor screws. This makes it possible to compensate for possible one-sided wear on the flanks by moving them beyond the original end points.
  • a further exemplary embodiment of the invention provides that an opening is provided on the gear section of the pump housing, that the opening is provided with a detachable cover, that the opening is arranged in such a way that the cover can be detached in the assembled state of the spindle pump, and that the gear space for Setting the backlash of the feed screws can be reached with the necessary tools.
  • Fig. 1 shows a sectional view of a spindle pump 10 according to the invention.
  • the spindle pump 10 has a housing 11 which has a pump section 12, a bearing section 13 and a gear section 14. These are spatially and hydraulically separated from one another via a sealing section 140.
  • the sealing section 140 has a mechanical seal 141 which has an inner diameter 62.
  • the spindle pump 10 comprises a driven shaft 15 and a driven shaft 16.
  • a feed screw 17 is arranged on the driven shaft 15 and a feed screw 18 is arranged on the driven shaft 16.
  • the conveyor screws 17, 18 each have a first screw section 52 and a second screw section 53, which are connected to one another via a central part 54.
  • the screw portions 52 and the screw portion 53 are engaged for conveyance, respectively.
  • the root diameter 61 is shown in the middle part.
  • a needle bearing 19 and a roller bearing 20 are provided in the bearing section 13, so that the shafts are mounted outside the pump section 12.
  • the needle bearing has an inner diameter 63.
  • the shafts 15, 16 to the right of the second screw section 53 are provided with a sealing section 55 and a bearing section 56. These are solidly shaped on the shaft 15, 16. Alternatively, these can also be pushed onto the shaft as bushings.
  • a sealing section 57 and a bearing section 58 are likewise provided on the shafts 15, 16 to the left of the first screw section 52. These are arranged as a sealing bush 59 and as a bearing bush 60 on the respective shaft 15, 16.
  • the root diameter 61 is made smaller than the inner diameter 62 of the mechanical seal 141.
  • the inner diameter 63 of the needle bearing 19 is larger than the inner diameter 62 of the mechanical seal 141.
  • the outer diameters of the sealing bush 57 and the sealing section 55 essentially correspond to the inner diameter 62 of the mechanical seal 141.
  • the outer diameters of the bearing bush 58 and the bearing section 56 essentially correspond to the inner diameter 63 of the needle bearing 19.
  • the shaft is tapered (not shown) to accommodate the bushings 57, 58.
  • gearbox 21 there are the shaft ends 22, 23.
  • the shaft end 22 of the driven shaft 15 extends out of the housing 11 and there has a connection 24 for a drive unit (not shown).
  • a gearwheel 25 is located on the driven shaft 15.
  • a gearwheel 26 is arranged on the driven shaft. The teeth of the gears 25, 26 are meshingly engaged.
  • a fastening element 27 is arranged on the driven shaft 16 on the shaft end 23.
  • the fastening element 27 has a socket section 28 and a flange section 29.
  • the outside of the bushing section 28 is at the same time a receiving surface 30 for the gearwheel 26.
  • a key 31 is inserted into a groove (not shown) in the shaft end 23 and in the fastening element 27, via which a rotational connection between shaft 16 and fastener 27 is established.
  • a hexagon screw 33 is screwed into a bore (not shown) in the end face 32 of the shaft end 23 and is used to screw a clamping disk 34 against a seat 35 on the fastening element 27.
  • the fastening element 27 is connected in a locking manner to the shaft end 23.
  • the flange section 29 has a bore 36.
  • the gear wheel 26 has a corresponding bore 37, which can be designed as a through bore or as a perforated bore.
  • a thread (not shown) is arranged in the bore 37.
  • a hexagon screw 38 is screwed into this thread, whereby the flange section 29 of the fastening element 27 is locked with the gearwheel 26.
  • a spacer bushing 39 is located behind the bushing section 28 of the fastening element 27, with which it is ensured that the gearwheel 26 cannot come into contact with the mounting section 13 with the fastening screws 40 of the transmission section 14.
  • Fig. 3 a top view of the gear section 14 without the cover (not shown) mounted on the opening 42 is shown.
  • the gear section 14 has a flat section 50 in which bores 51 are arranged around the opening 42 and have a thread (not shown) into which the fastening screws (not shown) are screwed.
  • the backlash it is possible to remove the cover (not shown through the opening 42 in the gear chamber 21 with a tool ( It is possible, for example, to loosen the hexagon screws 38 in order to rotate the driven shaft 16 relative to the gearwheel 26 and thus to reset the backlash .. After adjusting the backlash, the hexagon screws 38 are then tightened again and the Cover 43 with the fastening screws back on the flat section 50 by inserting the fastening screws into the bore 51 ready for operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Claims (5)

  1. Pompe à vis à deux vis (10), de construction à double flux, comprenant un carter de pompe (11) qui présente une portion de pompe (12), deux portions de palier (13) et au moins une portion d'engrenage (14) avec au moins un espace d'engrenage (21), les portions de palier (13) et la portion de pompe (12) étant réalisées de manière séparée l'une de l'autre, avec une partie de carter de refoulement en tant que constituant de la portion de pompe (12), dans laquelle sont prévues des vis de refoulement (17, 18) disposées sur deux arbres (15, 16), avec des flancs dans une réalisation à deux flux, les vis de refoulement (17, 18) présentant un diamètre de cercle de base (61) sur les arbres (15, 16), les arbres (15, 16) étant supportés des deux côtés dans les portions de palier (13) avec des paliers (19, 20), un joint d'étanchéité étant prévu dans la portion de palier (13) pour réaliser l'étanchéité de la portion de palier (13) par rapport à la portion de pompe (12), et les arbres (15, 16) s'étendant au moins d'un côté dans la portion d'engrenage (14), avec des roues dentées (25, 26) disposées sur les arbres (15, 16) dans la portion d'engrenage (14), au moyen desquelles les arbres (15, 16) sont accouplés en rotation, caractérisée en ce que le diamètre intérieur (62) du joint d'étanchéité est supérieur des deux côtés au diamètre du cercle de base (61) des vis de refoulement (17, 18), et en ce que des deux côtés, le diamètre intérieur (63) des paliers (19, 20) est supérieur ou égal au diamètre intérieur (62) du joint d'étanchéité.
  2. Pompe à vis (10) selon la revendication 1, caractérisée en ce que sur au moins un côté de l'arbre est prévue une première douille d'étanchéité (59) qui est disposée dans la région du joint d'étanchéité et qui présente un diamètre extérieur qui correspond au diamètre intérieur (62) du joint d'étanchéité.
  3. Pompe à vis (10) selon la revendication 1 ou 2, caractérisée en ce qu'une douille palier (60) est prévue sur au moins un côté de l'arbre, laquelle est disposée dans la région du palier (19, 20) et présente un diamètre extérieur qui correspond au diamètre intérieur (63) du palier (19, 20).
  4. Pompe à vis (10) selon la revendication 2 ou 3, caractérisée en ce que l'arbre (15, 16) présente, dans la région de la douille d'étanchéité et/ou de la douille palier (59, respectivement 60), un diamètre extérieur qui est inférieur ou égal au diamètre du cercle de base (61) et/ou au diamètre intérieur (62) du joint d'étanchéité.
  5. Pompe à vis (10) selon l'une quelconque des revendications 1 à 4, caractérisée en ce qu'une séparation hydraulique existe entre la portion de pompe (12) et la portion de palier (13), de préférence par le biais d'une garniture mécanique (141), et/ou en ce qu'entre la portion de palier (13) et la portion d'engrenage (14) il existe une séparation spatiale.
EP13000396.5A 2012-01-31 2013-01-28 Pompe à vis à broche double dans une construction à double flux Active EP2626511B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE201220000893 DE202012000893U1 (de) 2012-01-31 2012-01-31 Zweispindelige Schraubenspindelpumpe in einflutiger Bauweise
DE201220000894 DE202012000894U1 (de) 2012-01-31 2012-01-31 Zweispindelige Schraubenspindelpumpe in einflutiger Bauweise
DE102012005949A DE102012005949B4 (de) 2012-01-31 2012-03-26 Zweispindelige Schraubenspindelpumpe in zweiflutiger Bauweise

Publications (3)

Publication Number Publication Date
EP2626511A2 EP2626511A2 (fr) 2013-08-14
EP2626511A3 EP2626511A3 (fr) 2015-11-18
EP2626511B1 true EP2626511B1 (fr) 2020-07-29

Family

ID=47681605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13000396.5A Active EP2626511B1 (fr) 2012-01-31 2013-01-28 Pompe à vis à broche double dans une construction à double flux

Country Status (4)

Country Link
US (1) US9080566B2 (fr)
EP (1) EP2626511B1 (fr)
DE (1) DE102012005949B4 (fr)
ES (1) ES2821525T3 (fr)

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Publication number Priority date Publication date Assignee Title
DE202014010816U1 (de) 2014-08-11 2016-09-21 Jung & Co. Gerätebau GmbH Schraubenspindelpumpe mit Dampfsperre
JP6392448B2 (ja) * 2015-03-31 2018-09-19 株式会社日立産機システム スクリュー圧縮機
JP6426645B2 (ja) * 2016-03-18 2018-11-21 日立ジョンソンコントロールズ空調株式会社 回転式圧縮機
CN109707624A (zh) * 2018-12-18 2019-05-03 江阴爱尔姆真空设备有限公司 一种分体组合式双螺杆泵
CN109667912A (zh) * 2018-12-20 2019-04-23 江阴爱尔姆真空设备有限公司 一种双螺杆泵用齿轮箱
CN114483576A (zh) * 2022-03-01 2022-05-13 绍兴威格隆泵业有限公司 外联式磁力驱动双螺杆泵
CN117404041B (zh) * 2023-12-14 2024-02-23 中国石油集团渤海钻探工程有限公司 一种注采气井口装置

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EP2626511A2 (fr) 2013-08-14
ES2821525T3 (es) 2021-04-26
US20130202473A1 (en) 2013-08-08
EP2626511A3 (fr) 2015-11-18
DE102012005949A1 (de) 2013-08-01
DE102012005949B4 (de) 2013-09-12

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