EP2314873A2 - Pompe à vis avec un détecteur de fuite - Google Patents

Pompe à vis avec un détecteur de fuite Download PDF

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Publication number
EP2314873A2
EP2314873A2 EP20100013801 EP10013801A EP2314873A2 EP 2314873 A2 EP2314873 A2 EP 2314873A2 EP 20100013801 EP20100013801 EP 20100013801 EP 10013801 A EP10013801 A EP 10013801A EP 2314873 A2 EP2314873 A2 EP 2314873A2
Authority
EP
European Patent Office
Prior art keywords
lantern
sensor
leakage
screw pump
screw
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.)
Withdrawn
Application number
EP20100013801
Other languages
German (de)
English (en)
Inventor
Michael Jäckle
Christian Hopf
Heiner Kühn
Susanne Sutropp
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.)
Allweiler GmbH
Original Assignee
Allweiler AG
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
Application filed by Allweiler AG filed Critical Allweiler AG
Publication of EP2314873A2 publication Critical patent/EP2314873A2/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/48—Conditions of a reservoir linked to a pump or 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/78—Warnings

Definitions

  • the invention relates to a screw pump for conveying a pumped medium, preferably heavy oil pump for ships, with a pump housing (for at least one screw spindle), from which a drive shaft protrudes into a fixed to the pump housing lantern, in which the drive shaft coupled to a motor shaft of a drive motor and / / or can be coupled.
  • the DE 92 11 523 U1 , the DE 87 08 756 U1 and the DE 78 02 765 U1 show basic constructions of screw pumps. These comprise at least one screw arranged in a pump housing, which can either be coupled to a drive shaft for connection to a motor shaft or forms the drive shaft itself, ie is formed integrally with the drive shaft.
  • a screw pump in which a pump housing directly forms the extension of a motor housing.
  • the invention proposes, for a screw pump not having a lantern, to provide a shaft seal completely or partially in an annular space for the rotor.
  • the delivery medium leakage quantity in particular in the case of ship inclinations, can escape from mounting or maintenance openings located laterally in the lantern, which, on the one hand From the environmental point of view is disadvantageous and on the other hand represents a danger to the ship's crew, as this can slip on the leaking leak.
  • the delivery medium leakage occurs - even without ship inclination - from a formed between a lamp flange and a pump housing flange gap with the aforementioned problems from.
  • the present invention seeks to provide a cost-effective screw pump, with the risk of environmental pollution and the risk of injury is reduced by leaking fluid.
  • This object is achieved in a generic screw pump in that it comprises at least one sensor for detecting a located in the lantern Strukturmediumleckagemenge.
  • the invention is based on the idea of providing a monitoring sensor with which it is possible to detect whether a maximum permissible delivery medium leakage quantity has been reached, preferably in order to signal the operating personnel that the screw pump has to be serviced or delivery medium leakage has to be drained from the lantern.
  • the lantern which is designed for flanging the pump housing and a motor housing, directly forms the collecting trough for the delivery medium leakage. This makes it possible to dispense with an external, ie separate from the lantern sump.
  • the at least one, preferably only one, sensor is preferably arranged directly in and / or on the lantern, in particular a lantern peripheral wall.
  • the sensor detects a critical leakage level in the lantern, it outputs a corresponding signal to a controller that is signal-conducting connected to the sensor, which then optionally initiates further steps, for example, outputs an audible and / or visual warning signal and / or switches off the screw pump to avoid serious damage to man, machine and / or the environment.
  • a controller that is signal-conducting connected to the sensor, which then optionally initiates further steps, for example, outputs an audible and / or visual warning signal and / or switches off the screw pump to avoid serious damage to man, machine and / or the environment.
  • a trained according to the concept of the invention at least one screw, preferably three screw spindles, comprehensive screw pump has the advantage over hermetically sealed pumps that this is much cheaper to buy.
  • it is possible to retrofit existing older screw pumps by retrofitting a sensor and possibly an additional seal the connection between the pump housing and lantern and in this way latest requirements to suffice.
  • the existing lantern can therefore be dispensed with a costly replacement of older, non-hermetically sealed and thus leaking screw pumps. If later to be explained mounting holes in the existing lantern should be too deep, so that leakage of liquid leakage would have to be feared even at a low propensity ship, it may be advantageous to replace the existing lantern, preferably by a at least sealed at the bottom lantern, which serves as a leakage medium reservoir and which is preferably designed such that leakage of leakage fluid up to a ship's inclination of at least 20 °, preferably of at least 22.5 °, most preferably of 30 °, is reliably avoided.
  • a timer for example, 30 seconds is taken into account, preferably such that only if the sensor detects a critical leakage amount at least over a time period corresponding to the timer Alarm issued or a sensor signal is output to a controller.
  • an optoelectronic sensor is provided as the sensor, which preferably comprises at least one LED, preferably an infrared LED, as a light source and a light receiver.
  • the light of the light source in particular the infrared LED, directed from the inside to a reflection body, preferably a prism, of the sensor, from where the light is reflected to the receiver. If the delivery medium leakage quantity reaches the set maximum, the light preferably no longer reaches the receiver or only weakly.
  • the sensor is designed such that upon reaching the set maximum, the redesignmediumleckagemenge encloses a directed into the lantern prism tip and as a result the beam path to the receiver is interrupted. The sensor reacts to this change with a corresponding detection signal.
  • a float switch could be provided as the sensor, and this can be problematic insofar as, in the case of the formation of the pumped medium as heavy oil, this can lead to encrustations which impair the functioning of the float switch.
  • extremely robust float switch can be realized, but usually only with a correspondingly high cost.
  • an ultrasonic sensor wherein the ultrasonic sensor is usually prone to oil mist or condensate, which may occur especially when not on operating temperature screw pump. This problem can be avoided by the provision of a heating the screw pump at a standstill heating, especially a housing heating.
  • a heater is integrated in the screw pump housing, for example by the provision of an arranged in the housing heater.
  • the senor is connected to an electronic control which, upon reaching a critical winningmediumleckagemenge, i. upon reaching a, in particular adjustable or fixed maximum receives a signal from the sensor and even more preferably according, for example, with a warning signal for operators and / or reacted with a pump motor stop.
  • the senor is held on a peripheral wall of the lantern which preferably serves as a coupling point between the motor shaft and the drive shaft and which encloses the coupling lantern.
  • the sensor is arranged in a peripheral wall opening of the lantern, preferably in such a way that the sensor passes through the opening, in particular in such a way that a reflector, preferably formed by a prism, enters the lantern protrudes and can contact with its outside in contact with the delivery medium leakage when it reaches a critical level, ie filling.
  • the sensor receiving opening is arranged with axial distance to a bolted to the pump housing lantern flange.
  • the senor is releasably fixed to the lantern so that it can be replaced.
  • a screw connection in particular an external thread on the sensor, which is screwed to an internal thread of the peripheral wall opening of the lantern.
  • the senor is arranged such that voltage supply and / or signal lines open exclusively on the outside of the lantern in the sensor, so that an introduction of cables is avoided in the lantern. It is very particularly preferred if the voltage supply and / or signal lines can be connected to a sensor housing via a plug, in particular an angled plug.
  • the senor is designed to be retrofitted.
  • this is a mounting window or are in the case of providing multiple mounting windows all mounting windows on the lantern, in particular in the peripheral wall of the lantern, arranged such that the collected in the lantern conveyor medium leakage at a ship inclination of 20 °, preferably 22.5 ° , preferably from 25 °, most preferably from 30 ° (in particular to ensure the emergency power supply, preferably on ships, for the transport of liquid gases and / or chemicals) can not escape when the lantern located in favormediumleckagemenge the allowable, by means of the sensor does not exceed detectable maximum.
  • the one or more mounting apertures are located in the upper third of the axial extent of the lantern or lantern perimeter wall.
  • the at least one mounting opening is preferably above half the diameter of the lantern, ie above the longitudinal central axis of the lantern.
  • the lantern is sealed in such a way that the delivery medium leakage from the lantern can not escape from a gap between the lantern and the pump housing.
  • at least one, in particular designed as a flat and / or ring seal seal between the lantern and the pump housing is preferably arranged for this purpose, for example between the abutting flanges and / or between a penetrated by the drive shaft pump housing cover and the lantern.
  • fixing screws, with which the lantern is flanged to the pump housing are likewise sealed, in particular with a respective sealing ring arranged between the screw head and the flange, in particular the pump housing flange.
  • the pump housing of the screw spindle is not a hermetically sealed housing, but a housing with a passage opening, which is preferably arranged in a housing cover, wherein the drive shaft relative to the pump housing, in particular the pump housing cover and / or a bearing housing (drive shaft casing), a leaking seal is sealed, ie a gasket which allows a certain amount of leakage to pass axially in the direction of the lantern (coupling housing).
  • a mechanical seal or a radial shaft seal can be provided.
  • the sensor used is an optoelectronic sensor which projects into the lantern by means of a prism
  • protection means which reduce the risk of Minimize contamination of the sensor and thus impairment of its functionality.
  • a tubular or cup-shaped attachment can be provided, which projects beyond the actual sensor preferably in the radial direction (relative to the longitudinal central axis of the drive shaft).
  • the header is provided with at least one lower and / or side opening, preferably with lower and upper openings, to ensure that the leakage medium can reach the sensor.
  • the drive shaft is supported by a bearing arranged radially inside the peripheral wall of the lantern and this bearing is arranged within a housing part / drive shaft casing which surrounds the drive shaft in a section facing the pump chamber, it may possibly open the protective means surrounding the sensor are dispensed with when the sensor is at the axial height, ie within the axial extent, of the drive shaft shroud, since the drive shroud prevents direct contact of the rotating drive shaft with the accumulated amount of leakage medium within the lantern, thereby causing agitations in the amount of leaking fluid be prevented inside the lantern.
  • the invention also leads to a use of, for example, an optoelectronic sensor for detecting a conveying medium leakage quantity in a lantern of a screw pump.
  • an optoelectronic sensor for detecting a conveying medium leakage quantity in a lantern of a screw pump.
  • FIG. 1 to 3 different representations of a designed as a three-screw pump screw pump 1 are shown. This is designed as a ship pump for conveying heavy oil. As usual for heavy duty oil pumps for ships, the screw pump, as in the Fig. 1 and 2 shown vertically mounted so that a pump axis A is oriented vertically to a footprint 2.
  • the screw pump 1 comprises a pump housing 3, in which approximately centrally designed as a drive spindle, a diameter-enlarged peripheral collar portion 12 having, screw 4 is arranged, the two, the screw 4 is sandwiched drivingly designed as a spindle 5 screws spindles arranged.
  • the screw 4 is at the same time a drive shaft 6, which is arranged through a through-opening 7 in a pump housing cover 8, and which projects axially into a lantern 9 arranged adjacent to the pump housing 3, in which they with one of the opposite Side in the lantern 9 projecting motor shaft 10 of a drive motor 11 is coupled.
  • the passage opening 7 opens into a radially outside of a drive shaft casing 36 enclosed interior 37.
  • a slip ring seal seal 38 Within the interior 7 is formed in the embodiment shown as a slip ring seal seal 38, which ensure a leak-tight sealing of the pump housing 3 relative to the lantern 9 wearing.
  • On the side facing away from the pump chamber 13 side of the seal 38 is located within the drive shaft casing 36 (bearing housing) designed as a ball bearing 39 for rotatably supporting the drive shaft. 6
  • the lantern 9 is integrally formed in the embodiment shown and serves to center the drive motor 11 relative to the pump housing 3, the lantern 9 a lower, starting from the peripheral wall radially inwardly directed annular flange 14 and an upper, also radially inwardly directed annular flange 15th comprises, wherein the lantern 9 is screwed by means of the lower annular flange 14 with a flange 16 formed for pump housing cover 8 and with the upper annular flange 15 with a motor flange 17 of the drive motor 11.
  • each mounting hole 19 with a permeable, ie open grid 20 is closed to prevent accidental intervention.
  • the grids 20 can be removed for assembly and maintenance purposes.
  • the mounting openings 19 are located above the axial center of the lantern 9.
  • the lantern 9 in the peripheral wall 18 has two superimposed openings 24, 25 which are each sealed with a closure screw 26, 27 (alternatively, other sealants are) sealed.
  • the openings 24, 25 serving as access, for example for grease lubrication or for actuating a valve, are permanently open in screw pumps according to the prior art, since here the lantern (in contrast to the proposed pump) does not serve as a collecting vessel for leakage.
  • a drain screw 46 which is arranged approximately at the lantern base level and which closes a drain opening, through which the collected leak medium quantity can be discharged after removal of the drain plug 46.
  • peripheral wall opening 28 in which an optoelectronic sensor 29 is held, with which is detectable when a critical Strukturmediumleckagemenge within the lantern 9 is reached.
  • the sensor 29 protrudes into a tip 30 of a prism 31 into the interior of the lantern 9, wherein the reflection properties at the outer boundary surface to the prism 31 deteriorate as the delivery medium leakage reaches the tip 30, so that when reaching the tip 30, a light receiver, not shown no more light detected, causing a switching operation is triggered.
  • the sensor 29 is sealed off from the interior of the lantern 9 by means of a sealing disk 32 arranged between a peripheral collar of the sensor 29 and the outer circumference of the peripheral wall 18 of the lantern 9, so that escape of leakage medium is avoided.
  • Fig. 1 results, is the sensor 29, more precisely, the prism 31 of the sensor 29, at the axial height of the drive shaft casing 36.
  • the sleeve-like drive shaft casing 36 prevents later still illustrative designs in which the drive shaft is not sheathed in the lantern 9 protrudes, stirring up the located in the lantern 9 leakage fluid, so that wave movements of the leakage medium can be avoided due to the drive shaft rotation.
  • in such an embodiment can be dispensed with a prism 31 of the sensor 29 against leakage waves and / or leakage splash protective protective coating (protective means).
  • Fig. 3 is the lantern 9 shown in the cut state.
  • the sensor 29 opens a connection cable 33 with lines for the power supply and for sensor signals, which is guided, for example, to a control 34 only schematically indicated.
  • FIG. 4 an alternative embodiment of a screw pump 1 is shown. This differs from the previously described screw pump, inter alia, essentially in that the drive shaft 6 is not surrounded by a drive shaft casing 36 within the lantern 9 - rather, the drive shaft 6 is already free of sheathing in the region of a groove bottom, which results in the drive shaft 6 due to causes their rotational movement wave movements within the collected by the lantern 9 leakage amount.
  • the sensor 29 is arranged at the level of the freely rotating, ie unshielded or enveloped drive shaft 6, this could possibly (without suitable protective mechanisms) lead to an impairment of the sensor 29, in particular if the prism 31 of the sensor 29 is soiled .
  • the sensor 29 are associated with protection means 40, which are formed in the embodiment shown as a cup-shaped screw 41, which is screwed onto a sensor holding member 42 which is held in the peripheral wall 18 of the lantern 9, more precisely in the peripheral wall opening 28 ,
  • the protection means 40 reduce the risk of contamination of the prism 31 of the sensor 29 due to leakage waves and / or leakage splashes.
  • the screw cap 41 is for this purpose formed closed on the radially inner side and has in its lateral surface 43, two opposing holes 44, 45, although allow an increase in the leakage level within the protection means 40 and thus a detection of a critical leakage, but arranged such and dimensioned to prevent extensive protection of the sensor 29 from contamination by leakage medium wave and / or leakage splashes.
  • the sensor 29 may be cleaned after removal of the protection means 40.
  • the seal 38 for sealing the pump chamber 13 relative to the lantern 9 and the bearing 39 for the drive shaft 6 are located below the lantern 9 and not within this.
  • the drain plug 46 is arranged such that the leakage medium amount can be completely drained, at least approximately. In the exemplary embodiment shown, this is located in the annular flange 14.
  • a ring seal 47 which is arranged radially between the annular flange 14 and a cover member 48, relative to the cover part 48 of the pump housing 3.
  • the cover part 48 is sealed off from the pump chamber 13 via two further ring seals 49, 50, wherein the ring seal 49 is located radially between a housing part and the cover part 48 and the ring seal 50 is axially between the housing part and the cover part 48.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
EP20100013801 2009-10-23 2010-10-20 Pompe à vis avec un détecteur de fuite Withdrawn EP2314873A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910050556 DE102009050556A1 (de) 2009-10-23 2009-10-23 Schraubenpumpe

Publications (1)

Publication Number Publication Date
EP2314873A2 true EP2314873A2 (fr) 2011-04-27

Family

ID=43297018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100013801 Withdrawn EP2314873A2 (fr) 2009-10-23 2010-10-20 Pompe à vis avec un détecteur de fuite

Country Status (2)

Country Link
EP (1) EP2314873A2 (fr)
DE (1) DE102009050556A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106121999A (zh) * 2016-08-26 2016-11-16 黄山艾肯机械制造有限公司 一种耐用的中高压螺杆泵
CN106762618A (zh) * 2017-03-23 2017-05-31 上海工程技术大学 一种三螺杆泵从动螺杆的拉压力检测装置和方法
DE102016202892A1 (de) * 2016-02-24 2017-08-24 Thyssenkrupp Ag Vorrichtung zum Abdichten einer Pumpe sowie Pumpenabdichtsystem und Verwendung einer Stopfbuchse in der Vorrichtung
DE102017221510A1 (de) 2017-11-30 2019-06-06 Christian Maier GmbH & Co. KG Verfahren zur Messung der Größe eines Leckagestromes einer Dichtung
GB2556425B (en) * 2016-09-22 2021-03-10 Seepex Gmbh Eccentric screw pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7802765U1 (de) 1978-01-31 1979-10-31 Allweiler Ag, 7760 Radolfzell Schraubenspindelmaschine
DE8708756U1 (fr) 1987-06-24 1987-08-13 Allweiler Ag, 7760 Radolfzell, De
DE9211523U1 (fr) 1992-09-01 1993-02-25 Allweiler Ag, 7760 Radolfzell, De
US5343736A (en) 1992-06-15 1994-09-06 Systems Chemistry, Inc. Optical leak sensor and position detector
EP1623121B1 (fr) 2003-05-07 2007-08-15 Jets AS Pompe a anneau liquide de type a vis

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7802765U1 (de) 1978-01-31 1979-10-31 Allweiler Ag, 7760 Radolfzell Schraubenspindelmaschine
DE8708756U1 (fr) 1987-06-24 1987-08-13 Allweiler Ag, 7760 Radolfzell, De
US5343736A (en) 1992-06-15 1994-09-06 Systems Chemistry, Inc. Optical leak sensor and position detector
DE9211523U1 (fr) 1992-09-01 1993-02-25 Allweiler Ag, 7760 Radolfzell, De
EP1623121B1 (fr) 2003-05-07 2007-08-15 Jets AS Pompe a anneau liquide de type a vis

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016202892A1 (de) * 2016-02-24 2017-08-24 Thyssenkrupp Ag Vorrichtung zum Abdichten einer Pumpe sowie Pumpenabdichtsystem und Verwendung einer Stopfbuchse in der Vorrichtung
CN106121999A (zh) * 2016-08-26 2016-11-16 黄山艾肯机械制造有限公司 一种耐用的中高压螺杆泵
GB2556425B (en) * 2016-09-22 2021-03-10 Seepex Gmbh Eccentric screw pump
CN106762618A (zh) * 2017-03-23 2017-05-31 上海工程技术大学 一种三螺杆泵从动螺杆的拉压力检测装置和方法
CN106762618B (zh) * 2017-03-23 2018-12-07 上海工程技术大学 一种三螺杆泵从动螺杆的拉压力检测装置和方法
DE102017221510A1 (de) 2017-11-30 2019-06-06 Christian Maier GmbH & Co. KG Verfahren zur Messung der Größe eines Leckagestromes einer Dichtung
WO2019105854A1 (fr) 2017-11-30 2019-06-06 Christian Maier GmbH & Co. KG Procédé de mesure de la grandeur d'un flux de fuite d'une garniture d'étanchéité

Also Published As

Publication number Publication date
DE102009050556A8 (de) 2012-02-09
DE102009050556A1 (de) 2011-04-28

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