EP1762728A1 - Appareil pour l'adaptation des performances d'une pompe à anneau liquide - Google Patents

Appareil pour l'adaptation des performances d'une pompe à anneau liquide Download PDF

Info

Publication number: EP1762728A1
Authority: EP; European Patent Office
Prior art keywords: pump; control line; control; liquid ring; fluid
Prior art date: 2005-09-13
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP06019078A

Other languages

German (de)

English (en)

Other versions

EP1762728B1 (fr

Inventor

Fausto Olivares

Christoph Weber

Peter Dr. Trimborn

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.)

Gardner Denver Deutschland GmbH

Original Assignee

Gardner Denver Elmo Technology GmbH

Gardner Denver Nash Deutschland GmbH

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.)

2005-09-13

Filing date

2006-09-12

Publication date

2007-03-14

2006-09-12 Application filed by Gardner Denver Elmo Technology GmbH, Gardner Denver Nash Deutschland GmbH filed Critical Gardner Denver Elmo Technology GmbH

2007-03-14 Publication of EP1762728A1 publication Critical patent/EP1762728A1/fr

2012-11-07 Application granted granted Critical

2012-11-07 Publication of EP1762728B1 publication Critical patent/EP1762728B1/fr

Status Not-in-force legal-status Critical Current

2026-09-12 Anticipated expiration legal-status Critical

Images

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
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
- F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply
- 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
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
- F04C19/001—General arrangements, plants, flowsheets

Definitions

the invention relates to a device for the performance adaptation of a liquid ring pump, said pump comprising a cylindrical workspace for conveying a conveyed fluid between a fluid inlet (intake socket) and a fluid outlet (pressure socket), wherein an operating fluid is contained in the workspace, said device controls the volume of operating liquid in the pump during operation of the pump.
a liquid ring pump is suitable for conveying dry or liquid-containing gases and is commonly used both as a vacuum pump and also as a compressor.
a liquid ring pump of this type has an impeller eccentrically arranged inside a casing that contains an operating fluid. Water is often used as the operating fluid.
the rotation of the impeller causes the operating fluid in the pump casing to form a liquid ring that lifts off on the suction side from an impeller hub of the impeller and revolves with the same.
the liquid ring cooperates with the impeller to draw in fluid at the inlet, compress the fluid, and discharge it at the outlet. Due to the pump principle, the conveyed fluid when discharged via the pressure socket (outlet) is mixed with the operating fluid.
the operating fluid is subsequently separated from the conveyed gas in a separator and fed back to the pump.
the operating liquid in some pump arrangements can also serve to seal spaces between the shaft impeller and plate port of the pump.
a liquid ring pump is revealed, for example, in the printed publication US 4,392,783 .
Liquid ring pumps for the benefit of a simple design, often are not controllable or adjustable with respect to their driving power. Liquid ring pumps of this type are often sized for maximum load or maximum process requirements, and they therefore typically draw, too much driving power during normal operation. In the vast majority of existing installations, the excess power of the liquid ring pumps is reduced by means of a throttle regulation, false air, or bypass regulation. The excess driving power is simply disposed of in these cases.
Some modern systems employ liquid ring pumps that regulate the power requirement during changing process conditions via a speed adaptation by means of a converter.
converters consume a certain amount of the conserved energy through electrical losses.
the use of a converter disadvantageously entails a comparatively high investment expenditure, additional space requirement, and increased susceptibility to failure.
the invention is therefore based on the object of providing a device for the performance adaptation of a liquid ring pump, as well as a method carried out especially by said device for the performance adaptation of the liquid ring pump.
one embodiment of the device comprises a control line interfaced with a control element.
the control line is fluidly connected to the workspace or chamber of the pump.
the control line and element are designed to modify, as a correcting variable, a hydraulic characteristic of the liquid pump.
the modified characteristic is preferably the volume of operating liquid in the chamber during operation (running) of the pump.
the device could be designed to modify the viscosity of the operating fluid contained in the workspace.
one embodiment of the invention uses a control line fluidly connected to the total drain connection or outlet(s).
Standard pumps generally have a total drain connection allowing for the drainage of the operating fluid from the pump when the pump is not in operation i.e., shut down.
the control line cooperates with a control element (valve) which is interfaced with a control unit.
the control unit actuates the valve of the control line based on input from one or more sensors or other actuators which monitor process parameters.
the sensors could be process pressure, temperature, flow volume, or humidity sensors disposed at, in or upstream of the fluid inlet intake socket.
the volume of process liquid and/or dry content of the product can also be used as a process parameter.
the actuator in addition to sensors, could include a push button on the control unit. The push button activates the valve to release a predetermined amount of operating liquid during operation.
the control unit compares the actual value or values to a pre-set value or values for the process parameters and feeds or discharges a volume of operating fluid during operation to bring the actual values in line with the pre-set values. Therefore, the use of a control unit is advantageous in that it allows for the regulation of the pump by taking into account process parameters such as the physical characteristics of the conveyed fluids, one such characteristic being process pressure. It also, of course, allows one to take into account other process variables such as temperature.
controlling element such as the valve
the controlling element may be activated manually.
the control element may also be activated , pneumatically or hydraulically by signals from the control unit or from other means.
control line is interfaced with one or more of the internal shaft sealing supply connections present in known pumps. In this case, fluid is removed during operation through these sealing supply connections.
control line is interfaced with the pump by providing a unique connection in the pump for the control line.
Fig. 1 to 3 show a liquid ring pump 1 which has an approximately cylindrical workspace 6, total drain connections or outlets 2 and inner shaft seal supply connections or apertures 3.
the workspace has a central axis 40 and is radially surrounded by a housing 41.
the connections or apertures 2 and 3 are suitable for interfacing with a device or assembly 4 for controlling the volume of an operating fluid 5 in the workspace 6 of the liquid ring pump 1.
Operating/sealing supply liquid inlets 7 are also shown.
the pump 1 also includes an impeller 11 supported eccentrically relative to the work-space 6 with impeller blades 11a equidistantly arranged around its circumference, a hub 11 band a shaft 12.
the workspace 6 In axial direction the workspace 6 is confined by port plates 21a, 21b, which are coupled to end shields 18a, 18b.
the end shields 18a, 18b are symmetrical with each other.
the end shields 18a, 18b each have inlets 13 to the internal shaft seal connections 3.
the workspace 6 is partly filled with the operating fluid 5.
the operating fluid 5 is usually water.
the operating fluid 5 can serve to seal the interstices 43 between the impeller 11, shaft 12 and port plates 21a, 21b.
the impeller rotates in a direction of rotation 14.
An amount of a conveyed fluid 15 is drawn into inlets 16a,16b of the end shields or heads 18a,18b.
the conveyed fluid 15 exits the workspace 6 at outlets 20a, 20b.
the impeller blades or vanes 11a force the operating fluid 5 into a fast rotating movement so that the operating fluid 5, under action of the centrifugal force, forms a fluid ring 5a that is concentric relative to the workspace 6.
a sickle-shaped space 6b (shown in Fig. 6 to 8) is created between the fluid ring 5a and the impeller 11 within which an amount of the conveyed fluid 15 is transported in the direction of rotation 14 of the impeller 11.
the conveyed fluid 15 is a dry or wet gas.
the device 4 includes a control line, pipe or conduit 22.
the control line 22 is interfaced with a total drain line 2a by way of a two way valve 24.
the total drain line 2a is at a drive end of the pump 1.
the end shield 18a is located at the drive end.
the control line 22 is also interfaced with a control element 26 downstream of the valve 24.
the control element 26 can be an electronically or mechanically actuated valve.
the control element 26 is interfaced with a control unit 28. Interfaced with the control unit 28 is at least one sensor 30.
the at least one sensor 30 can be for sensing process pressure, temperature, humidity or flow volume.
the at least one sensor 30 can be located upstream, at, or in the fluid inlets 16a, 16b. Arranging the sensor(s) 30 at the fluid inlets 16a, 16b, i.e., on the suction side, is particularly advantageous, as the values for pressure, volume flow, temperature and humidity of the conveyed fluid 15 are not yet influenced and distorted through pressure loss, leakage, or diffusion of the operating fluid 5 into the conveyed fluid 15.
the control unit 28 receives signals from the temperature sensor 30 located along the pump discharge pathway 71.
the reference 4 in the drawings is not intended to refer to the whole pump assembly but rather only to the device which comprises the control unit 28, the at least on sensor 30, and the control line 22.
Line 70 generally shows a flow path of the conveyed fluid 15 which enters the pump 1 via the inlets 16a, 16b.
Line 71 generally shows the path of the conveyed fluid 15 exiting the outlets 20a, 20b.
line 72 generally depicts the pathway of supply liquid which enters the inlets 7.
the supply liquid can serve as operating liquid 5 for the liquid ring 5a. It can also serve to seal the interstices 43.
control unit 28 Prior to operation, the control unit 28 is programmed so as to have a specified or desired process parameter Ps. During operation, the control unit 28 compares actual process parameter values Pi to the specified parameters. The actual parameters are collected and transmitted to the control unit 28 via the at least one sensor 30. The control unit 28, in dependence on a comparison result transmits signals to actuate the control element 26 to discharge an amount of the operating fluid 5 from the workspace 6 to vary the actual value Pi to meet the desired value Ps.
the control element 26 of course can be a valve directly actuated by the control unit 28 or indirectly actuated by the control unit 28 by way of a motor. In the case of direct activation, one could use a solenoid valve.
a motor actuated valve however has the advantage that the size of the valve aperture can be varied by the motor to more precisely control the discharge.
an amount of the operating fluid 5 is discharged from the workspace 6, during operation of the pump 1.
the amount of discharged fluid is in addition to any fluid being discharged through outlets 20, 20b.
the discharged fluid is not immediately recirculated back into the workspace 6.
the valve can be actuated in other ways including manually, hydraulically, or pneumatically.
the device 4 uses the control line 22 which branches off from the total drain line 2a at the drive end, it is contemplated that by using appropriate valves and actuators one could use a single line for both the total drain line 2a and the control line 22 (See discussion of the embodiment according to Fig. 6). Further, although the device 4 is shown as regulating discharge out of the total drain outlet 2 in connection with the total drain line 2a, the device 4 could regulate the discharge at the total drain connection 2 on the non-drive end, i.e. at the shield 18b. As a further alternative, the control line 22 could include a conduit which interfaces the total drain connections 2 at both the drive end and non drive end of the pump 1 with the control element 26.
Fig. 5 shows an alternative way of interfacing a control line 32 of the device 4 for controlling the level of the operating fluid 5 with existing pump connections during operation of the pump 1.
the control line 32 is interfaced with the inner shaft seal connections 3 on both the drive and non-drive end.
the internal shaft seal supply to which the control line 32 is interfaced is generally shown at 3a.
the interface with the connections 3 could be through the inlets 13.
the liquid supply line or pathway which feeds the supply liquid into the pump 1 is generally shown by line 73.
the supply liquid could serve as operating liquid 5 or to seal the interstices 43.
control element 26 Interfaced with the control line or conduit 32 is the control element 26.
the control element 26 is actuated in the same manner as the control element 26 in the embodiment according to Fig. 4. In this embodiment, it is also shown that the control unit 28 receives signals from the temperature sensor 30 located along the pump discharge pathway 71.
the device 4 comprises a control line 100 for discharging and feeding an amount of the operating fluid 5 into the workspace 6.
the control line 100 opens into the total outflow or shutdown drain connection 2 of the workspace 6.
the control line 100 has a control element 102, which is designed especially in the style of a bi-directionally operable operating-fluid pump. Depending on the activation of the control element 102, an amount of the operating fluid 5 can thus be either fed to or removed from the workspace 6.
the control line 100 can serve as the total drain line after shut down.
the device 4 additionally comprises the control unit 28, which enables actuation of the control element 102 via the at least one sensor 30.
Fig. 7 shows an additional embodiment.
the device 4 in this case incorporates two separate control lines namely one feed control line 200a and one discharge control line 200b.
the workspace 6 has a peak 202 into which the discharge control line 200b opens.
the feed control line 200a opens into the workspace at the total outflow 2.
the discharge control line 200b is preferably interfaced with the inner shaft seal connection 3. The interface could be through the inlets 13 (not shown in Fig 7).
the feed control line 200a and the discharge control line 200b each have a control element 206a and 206b in the form of a control valve or pump for regulating the flow of the operating fluid 5 through the control lines 200a, 200b.
the Control unit 28 enables activation of the control elements 206a, 206b depending on the input from the at least one sensor 30.
the device 4 in contrast to the embodiment according to Fig 7, comprises only a single control line 300 for feeding or discharging an amount of the operating fluid 5 into the workspace 6.
the control element 26 is interfaced with the control line 300.
the control line 300 could have its own unique connection or interface with the inner shaft seal connections 3.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Structures Of Non-Positive Displacement Pumps (AREA)
Control Of Positive-Displacement Pumps (AREA)
Control Of Non-Positive-Displacement Pumps (AREA)

EP06019078A 2005-09-13 2006-09-12 Appareil pour l'adaptation des performances d'une pompe à anneau liquide Not-in-force EP1762728B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102005043434A DE102005043434A1 (de)	2005-09-13	2005-09-13	Einrichtung zur Leistungsanpassung einer Flüssigkeitsringpumpe

Publications (2)

Publication Number	Publication Date
EP1762728A1 true EP1762728A1 (fr)	2007-03-14
EP1762728B1 EP1762728B1 (fr)	2012-11-07

Family

ID=37461462

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP06019078A Not-in-force EP1762728B1 (fr)	2005-09-13	2006-09-12	Appareil pour l'adaptation des performances d'une pompe à anneau liquide

Country Status (5)

Country	Link
US (1)	US20070059185A1 (fr)
EP (1)	EP1762728B1 (fr)
CN (1)	CN1932292A (fr)
DE (1)	DE102005043434A1 (fr)
ES (1)	ES2396482T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2018156909A1 (fr) *	2017-02-24	2018-08-30	Gardner Denver Nash Llc	Système de pompe comprenant un dispositif de commande
WO2023156951A1 (fr) *	2022-02-17	2023-08-24	Edwards Technologies Vacuum Engineering (Qingdao) Company Limited	Système et procédé de nettoyage de système de pompe à anneau liquide

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2007143860A1 (fr) *	2006-06-15	2007-12-21	Zoltech Inc.	Pompe à bague oscillante à déplacement variable
US20120087808A1 (en) *	2010-10-11	2012-04-12	General Electric Company	Liquid ring compressors for subsea compression of wet gases
US20120207624A1 (en) *	2011-02-14	2012-08-16	Paul Finestone	Liquid Water Removal Apparatus
EP2791511B1 (fr) *	2011-12-12	2016-09-14	Sterling Industry Consult GmbH	Pompe à vide à anneau liquide pourvue d'un réglage de cavitation
TWM449197U (zh) *	2012-09-14	2013-03-21	Tekomp Technology Co Ltd	螺旋轉子型液環式壓縮機
WO2015193318A1 (fr) *	2014-06-18	2015-12-23	Sterling Industry Consult Gmbh	Compresseur à anneau liquide
CN104295519A (zh) *	2014-10-17	2015-01-21	陕西科技大学	一种控制装置、水环真空泵及其控制方法
DE102016003428B4 (de)	2016-03-21	2022-02-10	Richard Bethmann	Wärmepumpenanlage
CN107939677B (zh) *	2017-10-30	2019-07-23	兰州理工大学	一种液环泵
GB2571970B (en) *	2018-03-14	2020-09-16	Edwards Tech Vacuum Engineering (Qingdao) Co Ltd	A liquid ring pump manifold with integrated non-return valve
GB2571971B (en) *	2018-03-14	2020-09-23	Edwards Tech Vacuum Engineering Qingdao Co Ltd	Liquid ring pump control
WO2022041106A1 (fr) *	2020-08-28	2022-03-03	Edwards Technologies Vacuum Engineering (Qingdao) Co Ltd	Commande d'écoulement de liquide de fonctionnement dans une pompe à anneau liquide
CN115750353B (zh) *	2022-11-19	2023-07-28	上海阿波罗机械股份有限公司	一种屏蔽多级自冷却式压缩机

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2006
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- 2006-09-12 ES ES06019078T patent/ES2396482T3/es active Active
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2018156909A1 (fr) *	2017-02-24	2018-08-30	Gardner Denver Nash Llc	Système de pompe comprenant un dispositif de commande
CN110418891A (zh) *	2017-02-24	2019-11-05	佶缔纳士机械有限公司	包括控制器的泵系统
WO2023156951A1 (fr) *	2022-02-17	2023-08-24	Edwards Technologies Vacuum Engineering (Qingdao) Company Limited	Système et procédé de nettoyage de système de pompe à anneau liquide

Also Published As

Publication number	Publication date
EP1762728B1 (fr)	2012-11-07
US20070059185A1 (en)	2007-03-15
DE102005043434A1 (de)	2007-03-15
ES2396482T3 (es)	2013-02-21
CN1932292A (zh)	2007-03-21

Publication	Publication Date	Title
EP1762728B1 (fr)	2012-11-07	Appareil pour l'adaptation des performances d'une pompe à anneau liquide
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RU2228455C2 (ru)	2004-05-10	Система топливопитания и регулирования газотурбинного двигателя
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US5588806A (en)	1996-12-31	Liquid ring machine and process for operating it
WO2007070596A3 (fr)	2007-10-11	Systeme de compresseur de pile a combustible
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JPS5958186A (ja)	1984-04-03	パワ−ステアリング用可変容量形ポンプ
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