CN101270765A - Vacuum system for conveying a high amount of supplemental liquid - Google Patents

Vacuum system for conveying a high amount of supplemental liquid Download PDF

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Publication number
CN101270765A
CN101270765A CNA2007101124406A CN200710112440A CN101270765A CN 101270765 A CN101270765 A CN 101270765A CN A2007101124406 A CNA2007101124406 A CN A2007101124406A CN 200710112440 A CN200710112440 A CN 200710112440A CN 101270765 A CN101270765 A CN 101270765A
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CN
China
Prior art keywords
pump
unit
liquid
separation machine
chamber
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Pending
Application number
CNA2007101124406A
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Chinese (zh)
Inventor
鲁迪·迪特马尔
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Gardner Denver Deutschland GmbH
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Gardner Denver Deutschland GmbH
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Filing date
Publication date
Application filed by Gardner Denver Deutschland GmbH filed Critical Gardner Denver Deutschland GmbH
Publication of CN101270765A publication Critical patent/CN101270765A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D31/00—Pumping liquids and elastic fluids at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/163—Combinations of two or more pumps ; Producing two or more separate gas flows driven by a common gearing arrangement

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • External Artificial Organs (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The invention relates to a pump apparatus for conveying gas-liquid mixture, comprising a first pump (7) for conveying gas having a first pump cavity (28) and a first impeller (33), a second pump (11) for conveying liquid having a second pump cavity (36) and a second impeller (41), and a driving device (2) for driving the pumps (7, 11) having a driving shaft (4) capable of driving rotatably. The driving shaft (4) is connected with two impellers (33, 34).

Description

A kind of vacuum system that is used to transmit high amount of supplemental liquid
Technical field
The present invention relates to a kind of vacuum pump-unit when transmitting liquid that is used for.
Background technique
Water-ring pump is widely used in the generation vacuum.This pump transmits gas in mode efficiently.Yet its shortcoming is be restricted aspect the transmission liquid.If exceeding, the ratio of liquor charging body to be passed and the body volume of supplying gas to be passed is about 5% value, gravity phenomenon (gravitational phenomena), noise interference and excessive mechanical tension can take place on the assembly of pump so thereupon, cause blocking, the damage of motor overload or pump.
Use the second independent pump to be used for transmitting liquid and can bring the more space demand, need to consume more energy, and be accompanied by higher operation and installation expense.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of vacuum pump-unit when transmitting liquid that is used for.
Above-mentioned purpose realizes by the described characteristic of claim 1.Key of the present invention is to form vacuum pump and the single-phase combination that is used for the pump of fluid transfer.Pump-unit of the present invention is compact especially, compares with the water-ring pump of sizable transmission liquid, has improved 30% efficient, and described pump-unit is without any need for additional control unit, and prevents that described vacuum pump from transshipping too much owing to transmitting liquid.
Other beneficial effect of the present invention is provided in the dependent claims.Characteristic of the present invention and details provide by describing two mode of executions with reference to the accompanying drawings.
Description of drawings
Fig. 1 is the perspective view according to the pump-unit of a mode of execution;
Fig. 2 is the front view according to the pump-unit of Fig. 1;
Fig. 3 is the side view according to the pump-unit of Fig. 1;
Fig. 4 is the plan view according to the pump-unit of Fig. 1;
Fig. 5 is the longitdinal cross-section diagram according to the pump chamber that passes through pump-unit of Fig. 1;
Fig. 6 is the schematic representation according to sequence of flow in the pump-unit operating process of Fig. 1; And
Fig. 7 is the schematic representation according to sequence of flow in second embodiment's the pump-unit operating process.
Embodiment
With reference to Fig. 1 to Fig. 5 an embodiment of the invention are described below.The structure of described pump-unit at first, is described.Pump-unit 1 comprises the transmission device that is configured to motor 2, and motor 2 has along live axle 4, motor housing 5 and the pedestal 6 of spin axis 3 location.In addition, pump-unit 1 comprises that being used for vacuum first pump, 7, the first pumps 7 has the first suction connected element 8, the first outlet connected element 9 and first pump case 10.First pump 7 is configured to water-ring pump especially.In addition, pump-unit 1 comprises second pump 11 that is used to transmit liquid with the second suction connected element 12, the second outlet connected element 13 and second pump case 14.Second pump 11 is configured as side channel pump (sidechannel pump) and is (self-priming) of self-priming.Yet second pump 11 also can be used as the pump configuration of other any suitable transmission liquid.At last, pump-unit 1 comprises first supply tube 15 with first liquor separation machine 16, has first discharge pipe 17, second supply tube 19 that are used for farther transmission gas of second seperator 18 and is used for second discharge pipe 20 of farther transmission liquid.
First supply tube 15 links to each other with the first suction connected element 8 by the first supply tube flange 21.First supply tube 15 has controllable inlet 44, and being used for provides operating liquid to first pump 7.First discharge pipe 17 links to each other with the first outlet connected element 9 by the first discharge pipe flange 22.Equally, second supply tube 19 links to each other with the second suction connected element 12 by the second supply tube flange 23, and second discharge pipe 20 links to each other with the second outlet connected element 13 by the second discharge pipe flange 24.At last, second supply tube 19, link to each other with the first liquor separation machine 16 by the first seperator flange 25 with the second suction connected element, 12 opposing ends.Second discharge pipe 20 is T shapes, and the connected element 26 of the arm by forming T shape parts links to each other with the second liquor separation machine 18.All flange connect 21,22,23,24,25 and 27 all be configured to airtight, waterproof especially.In addition, pump-unit 1 has main supply tube 45 and gas discharge pipe 46.Main supply tube 45 is open in the side of the pump that enters into the first liquor separation machine 16.Gas discharge pipe 46 is open in the side of the pump that enters the second liquor separation machine 18.
Liquor separation machine 16,18 is configured as the gravity separation machine.They can also form by the simple and easy pipeline that allows the economic especially mode of pump-unit 1 usefulness to construct.
First pump case 10 is configured to the cylindrical shape of hollow substantially, is positioned at the position of departing from live axle 4 centers.Second pump case 14 is configured to the cylindrical shape of hollow equally substantially, and concentric with live axle 4.
First pump 7 has first pump chamber 28, and this pump chamber is in its peripheral and face toward motor 2 side, with air-tight water-proof mode and 10 sealings of first pump case.In the side away from motor 2, first pump chamber 28 is belonged to first cover plate 29 of first pump case 10 and is determined the boundary line.First cover plate 29 has the first suction mouth 30, first outlet, 31 and first connection mouth 32.In this structure, the first suction connected element 8 is communicated with the first suction mouth, 30 fluids.The first outlet connected element 9 and first outlet, 31 fluids are communicated with.On the side away from first pump chamber 28 on first cover plate 29, separate by the suction side of partition walls (not shown in FIG.) with the pressure and first pump 7.
The center that first pump chamber 28 departs from live axle 4.Live axle 4 is conducted through first pump chamber 28, and live axle 4 seals with first pump case 10 on the one hand, on the other hand with 29 sealings of first cover plate.First impeller 33 is positioned on the live axle 4 in first pump chamber 28.First impeller 33 is positioned on the live axle 4 in the mode of " suspending (floating) " especially.In the side of first pump case 10 facing to motor 2, live axle 4 is by sealed 34 sealing in path of shell 10, and Sealing 34 is configured to the movable annular Sealing.
First cover plate 29 seals by O shape ring 35 and first pump case 10 and second pump case 14 at its periphery.
Second pump case 14 on the direction of running shaft 3 with first pump case 10, adjacent away from motor 2 one sides.This set allows pump-unit 1 to construct in compact especially mode.
The diameter of live axle 4 reduces slightly in the zone of first cover plate 29.
Second pump 11 has second pump chamber 36.Second pump chamber 36 its in the face of side of motor 2 by fully fixing limit with second pump case, 14 integrally formed partition walls 37.Second pump chamber 36 is fixed limit by second pump case, 14 all border district.A side relative on the direction of running shaft 3 with partition walls 37, second pump chamber 36 is fixed limit by protective housing 38, and protective housing 38 belongs to second pump case 14 and is connected in the air-tight water-proof mode with second pump case 14.Protective housing 38 has seat 39, is used to hold the end of live axle 4 away from motor 2.Live axle 4 can be installed on present 39 by the bearing (not shown in FIG.).Protective housing 38 is at its circular groove that also has the runner class in the face of a side of motor 2, and this groove forms side runner 40 and is the part of second pump chamber 36.For avoiding the formation of unwanted eddy current swirling flow, the external boundary wall of side runner 40 is configured to aim at the inwall of second pump case 14.Side runner 40 has breach (break) on peripheral direction.Second impeller 41 is installed on the live axle 4 in second pump chamber 36.Second impeller 41 is positioned on the live axle 4 in the mode of tight slip.For avoiding the allowable deviation problem, be configured as on the axle direction of live axle 4 and can regulate automatically.
The second suction connected element 12 and the second outlet connected element 13 and pump chamber 36 fluid communication.Partition walls 37 has second connection mouth 42.First connection mouth 32, second connection mouth 42 and connecting tube 43 form through-flow between first pump chamber 28 and second pump chamber, 36 perimeters and are connected 47.Connecting tube 43 is configured to for example cast runner.
First pump case 10 and second pump case, 14 usefulness gray cast iron are made, and impeller 33,34 usefulness bronze are made, and live axle 4 usefulness stainless steels are made, to prevent to be subjected to cavitation erosion infringement and corrosion.Impeller 33,41 and shell 10,14 can also be made with stainless steel when some is used.According to the purposes of pump-unit 1, can select alternate material.
The operation of pump-unit 1 will be described with reference to Fig. 6 hereinafter.Although the flow sequence in pump-unit 1 operating process is schematically illustrated in Fig. 6, has still provided respectively with in the pump-unit 1 and respectively constructed the drawing reference numeral that element is associated, so that described order is more readily understood.
By main supply tube 45, gas-liquid mixture is passed through the pumping action suction from process chamber 48.Pressure p sIn main supply tube 45, take advantage.Liquid by the pumping action suction is owing to the reason of gravity concentrates on the bottom of the first liquor separation machine 16, so gas-liquid mixture to small part is separated into two kinds of components of liquids and gases.The gas that can contain liquid residue then by first pump 7 via first supply tube 15 under pumping action, be pumped into first pump chamber 28 through first connected element 8 of bleeding.The rotation of first impeller 33 that motor 2 drives by live axle 4 forces operating liquid in first pump chamber 28 of first pump 7 under action of centrifugal force, away from running shaft 3, arrives the peripheral border of first pump chamber 28.Thereby the operating liquid of first pump 7 forms liquid ring at the exterior domain of first pump chamber 28.Because first pump chamber 28 is with respect to the exocentric structure of live axle 4, so caused such chamber, promptly, it seals with gastight manner, and fix limit, fix limit by first impeller 33 on the other hand by liquid ring on the one hand, and its volume periodically changes in the process of running shaft 3 rotations at impeller 33.Periodic variation interrelates with the periodic relief of pressure on this volume.Thereby have first outlet 31 in the zone that chamber has minimum volume and has a pressure maximum,, have pressure p by this outlet D＞p sGas leave from first pump 7.
After first pump 7, before gas further transmitted by gas discharge pipe 46, remaining treatment fluid or the operating liquid in the pump was separated from the gas in gas in the second liquor separation machine 18.The liquid that separates in the second liquor separation machine 18 is introduced second discharge pipe 20 by connected element 26, and further transmits with the liquid from 11 dischargings of second pump.
The liquid that separates in the first liquor separation machine 16 by under the pumping action of second supply tube 19, enters second pump chamber 36 via the second suction connected element 12 by second pump 11.First impeller, the 33 the same driven shafts 4 of second impeller 41 of second pump 11 and first pump 7 drive.Therefore first pump 7 and second pump 11 have common live axle 4.Therefore, be configured as first pump 7 of water-ring pump and be configured to be very compact and to save the space as the combination of second pump 11 of side channel pump.After second pump 11, the liquid that is transmitted is introduced second discharge pipe 20 by the second outlet connected element 13, and transmits by second discharge pipe 20.
In the first liquor separation machine 16, gas-liquid mixture is separated into the gentle body portion of liquid part, prevented, because the moment flow of liquid volume of smoking by the pumping action of water-ring pump exceeds 5% the maximum permissible value of being about in the gas volume that is transmitted by water-ring pump.Guaranteed like this no matter how many amounts of liquor charging body to be passed is, always water-ring pump is not operated there to be cavitation erosion (cavitation-free) mode.This just means the damage of the assembly that can be avoided pump and the overload of motor 2.Simultaneously, pump-unit 1 is compared with water-ring pump sizable, that transmit liquid, and efficient has improved 30%.
In second discharge pipe 20, have the pressure p identical with first discharge pipe 17 DAlthough may be in the second liquor separation machine 18 and pump 7 and 11 on the pressure side on cause disturbing the pressure compensation phenomenon, in principle, in second discharge pipe 20, exist and be different from pressure p in first discharge pipe 17 DPressure be possible.
Liquid from liquid ring in first pump chamber 28 can flow into second pump chamber 36 by connecting 47.This has eliminated the risk of the dry operation of side channel pump.
Because the difference of pressure is very little between two pump chambers 28,36, so do not need axle is carried out complexity and very effective sealing between two pump chambers 28,36.Therefore, narrow clearance seal is just enough.Because the cause of the transmission characteristic of side channel pump does not need special controlling mechanism to operate second pump 11 that transmits liquid, so compare with for example centrifugal pump, the combination of water-ring pump and side channel pump is especially useful.
Another embodiment of described pump-unit 1 describes with reference to figure 7 hereinafter.Different be basic with first embodiment, provide two supply tubes that separate 15,19 to replace being used for smoking the main supply tube 45 of gas-liquid mixture by pumping action, and the first liquor separation machine 16 that separates from the gas that is transmitted of the liquid that is used for being transmitted.First supply tube 15 is mainly used in transmission gas, is configured to guarantee to keep vacuum in treatment chamber 48 as first pump 7 of water-ring pump.Be configured to utilize second supply tube 19 in treatment chamber 48, to transmit liquid as second pump 11 of self-priming pump (especially as side channel pump).Through-flow between first pump 7 and second pump 11 is connected 47 and prevented that side channel pump from having only dry operation under the situation of small amount of liquid, thereby prevented the damage to sealing.

Claims (8)

1. pump-unit is used to transmit gas-liquid mixture, comprising:
A. first pump (7) is used to transmit gas and comprises:
I. first pump chamber (28), and
Ii. first impeller (33),
B. second pump (11) is used to transmit liquid and comprises:
I. second pump chamber (36), and
Ii. second impeller (41), and
C. drive unit comprises the live axle (4) of rotatable driving being used to drive described pump (7,11),
D. described live axle (4) links to each other with two impellers (33,34).
2. pump-unit according to claim 1 is characterized in that, described first pump (7) is configured to water-ring pump.
3. according to the described pump-unit of above-mentioned each claim, it is characterized in that described second pump (11) is a self-priming pump.
4. according to the described pump-unit of above-mentioned each claim, it is characterized in that described second pump (11) is configured to side channel pump.
5. pump-unit according to claim 1 is characterized in that, at least one liquor separation machine (16) is set for and separates the liquid that transmits from the gas that transmits.
6. pump-unit according to claim 5 is characterized in that, at least one liquor separation machine (16) is positioned at the suction side of described pump (7,11).
7. according to claim 5 or 6 described pump-units, it is characterized in that, be provided with the second liquor separation machine (18) at outlet side.
8. according to each described pump-unit in the claim 5 to 7, it is characterized in that at least one liquor separation machine (16,18) is configured to the gravity separation machine.
CNA2007101124406A 2007-03-20 2007-06-26 Vacuum system for conveying a high amount of supplemental liquid Pending CN101270765A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007013872A DE102007013872A1 (en) 2007-03-20 2007-03-20 Vacuum system for high additional liquid quantities
DE102007013872.7 2007-03-20

Publications (1)

Publication Number Publication Date
CN101270765A true CN101270765A (en) 2008-09-24

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CNA2007101124406A Pending CN101270765A (en) 2007-03-20 2007-06-26 Vacuum system for conveying a high amount of supplemental liquid

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US (1) US20080232954A1 (en)
CN (1) CN101270765A (en)
DE (1) DE102007013872A1 (en)
IT (1) ITMI20071529A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103026072A (en) * 2010-06-17 2013-04-03 弗里德科股份公司 Conveying device
CN104619989A (en) * 2012-09-03 2015-05-13 施特林工业咨询公司 Side-channel pump, and method for operating a side-channel pump

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8821113B2 (en) * 2010-12-21 2014-09-02 Hamilton Sundstrand Corporation Air cycle machine seal land
DE102015200843A1 (en) * 2015-01-20 2016-07-21 Speck Pumpen Vakuumtechnik Gmbh pump unit
DE102022001696A1 (en) 2022-05-13 2023-11-16 Truma Gerätetechnik GmbH & Co. KG Two-stage pump

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US3213794A (en) * 1962-02-02 1965-10-26 Nash Engineering Co Centrifugal pump with gas separation means
US3558236A (en) * 1968-09-10 1971-01-26 Delavan Manufacturing Co Self-purging regenerative turbine pump
US4914921A (en) * 1988-08-16 1990-04-10 Cbi Research Corporation Refrigeration method and apparatus using aqueous liquid sealed compressor
US4946349A (en) * 1989-07-19 1990-08-07 National Space Development Agency Of Japan Water ring vacuum pump
WO1995004224A1 (en) * 1993-08-03 1995-02-09 United Technologies Corporation Centrifugal fuel pump with starting stage
NL9401455A (en) * 1994-09-07 1996-04-01 Andre S J Van Coillie En Johan Self-priming centrifugal pump-vacuum pump combination for, among other things, liquid fuels such as petrol, gasoil, kerozene, etc. with improved deaerator and integrated evaporation recovery option.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103026072A (en) * 2010-06-17 2013-04-03 弗里德科股份公司 Conveying device
CN103026072B (en) * 2010-06-17 2016-08-03 弗里德科股份公司 Conveying equipment
CN106122045A (en) * 2010-06-17 2016-11-16 弗里德科股份公司 Conveying equipment
CN104619989A (en) * 2012-09-03 2015-05-13 施特林工业咨询公司 Side-channel pump, and method for operating a side-channel pump

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ITMI20071529A1 (en) 2008-09-21
DE102007013872A1 (en) 2008-09-25
US20080232954A1 (en) 2008-09-25

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