WO2020151776A1 - Dispositif destiné à un système d'alimentation en continu en fluides hautement visqueux - Google Patents

Dispositif destiné à un système d'alimentation en continu en fluides hautement visqueux Download PDF

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Publication number
WO2020151776A1
WO2020151776A1 PCT/DE2019/100871 DE2019100871W WO2020151776A1 WO 2020151776 A1 WO2020151776 A1 WO 2020151776A1 DE 2019100871 W DE2019100871 W DE 2019100871W WO 2020151776 A1 WO2020151776 A1 WO 2020151776A1
Authority
WO
WIPO (PCT)
Prior art keywords
medium
pressure
sensor
air
air bubbles
Prior art date
Application number
PCT/DE2019/100871
Other languages
German (de)
English (en)
Inventor
Frederic Förster
Rolf Walther
Original Assignee
Walther Systemtechnik 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.)
Filing date
Publication date
Application filed by Walther Systemtechnik Gmbh filed Critical Walther Systemtechnik Gmbh
Priority to DE112019006710.9T priority Critical patent/DE112019006710A5/de
Publication of WO2020151776A1 publication Critical patent/WO2020151776A1/fr

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means

Definitions

  • the invention relates to a device for a continuous
  • viscous media in the form of lubricants for example in the form of grease or oil
  • the application of viscous media in the form of lubricants can be seen as one of the core operations in automated assembly processes and systems. Whenever assembled components are moved relative to one another over their product life cycle or the friction of components during assembly is to be reduced, the automated application of lubricant is necessary during the assembly process.
  • a key requirement here is that the lubricant must be free of air pockets when it is applied when it is applied to components. Especially when it comes to highly viscous lubricants, it is quite difficult to get them free of air.
  • WO 2010/017593 A1 describes an automatic lubrication system in which grease is applied by means of a pump which is connected to a grease piston
  • Air purge valves are provided on each injector, which detect whether the presence of air in the grease makes the operation of the piston movement unusual. In this case, the air purge valve is opened to direct air-laden grease into a recovery reservoir.
  • Lubricant known, comprising a sensor for air detection in a lubricant transport path, air discharge means for discharging air from the lubricant transport path and control means for controlling the discharge of air from the lubricant transport path in response to an air detection signal from the sensor.
  • US 6053285 A describes a device for detecting undesirable gas quantities in the lubricant in one
  • the lubricant metering system includes: a measuring chamber that is adapted for connection to a lubricant metering system and configured for receiving lubricant; a movable rod located at least partially within the measurement chamber; a device connected to the measuring chamber with which one
  • Pressure change on the lubricant can be caused in the measuring chamber; a valve and a sensor that detects unwanted amounts of gas in the
  • DE 10 2010 032 010 A1 discloses a device for the metered application of a lubricating grease, this device comprising a grease container, a grease pump and a metering unit which are connected to one another via a grease line.
  • this device comprising a grease container, a grease pump and a metering unit which are connected to one another via a grease line.
  • a grease container comprising a grease container, a grease pump and a metering unit which are connected to one another via a grease line.
  • a grease container comprising a grease container, a grease pump and a metering unit which are connected to one another via a grease line.
  • Dosing unit an optical assembly that has a sight glass on the the lubricating grease is guided past, and an optical sensor is provided which detects gas inclusions within the sight glass, and the latter
  • Output signal controls a valve for degassing the grease line.
  • this device cannot supply the lubricant to the downstream metering valves during the degassing process
  • the object of the present invention is therefore to provide an improved device for a supply system for highly viscous media.
  • the invention thus relates to a device for a continuous
  • Supply system for highly viscous media in particular highly viscous lubricants such as greases, comprising a line system for the transport of the medium within the device, which comprises an inlet and an outlet for the medium.
  • This device also has a pressure regulator which is arranged at the inlet and by means of which the inlet pressure of the medium in the device can be regulated to approximately 10 6 Pascal or less, preferably to 7 * 10 5 Pascal, and a first one
  • Throttle orifice that connects to the pressure regulator and that
  • volume flow to the downstream sensor for the detection of air bubbles in the medium is limited to a flow of approx. 0.1 l / min.
  • a control unit is also provided which, based on the sensor measured values, controls the valves for removing the medium mixed with air bubbles.
  • the air bubble-free medium is passed through a second throttle orifice, which further reduces the static line pressure, preferably to 1.5 * 10 5 Pascals, and prevents a sudden expansion of any air bubble into the downstream line area of the device.
  • an additional, pressure-controlled medium reservoir is arranged parallel to the line, in which the gas-free medium can be stored.
  • Throttle orifice forms a second together with a valve
  • the second media volume flow controller is arranged between the sensor and a controllable high pressure pump.
  • the adjustable one At the end of the device's internal line system is the adjustable one
  • High-pressure pump arranged with which the outlet pressure of the medium can be increased to over 10 6 Pascal, preferably over 10 7 Pascal, for example 1.5 * 10 7 Pascal. With this pressure, the medium is removed from the device again.
  • the outlet pressure from the device preferably corresponds to the inlet pressure of the medium, that is to say the pressure at which the medium is fed into the device.
  • Medium storage is thus arranged between the media volume flow controller and the high pressure pump.
  • the sensor for detecting air bubbles in the medium is preferably based on an ultrasound measuring principle, since such a sensor can be used
  • a collecting container in which the air-containing medium can be collected.
  • This collecting container can be part of the device or as an external unit to this device
  • the reservoir for the air-free medium is divided into a hydraulic section and a pneumatic section, with the hydraulic section and the pneumatic section, a movable sealing element, which preferably has the shape of a piston, is provided.
  • the medium is stored in the hydraulic section. The pressure in the pneumatic
  • Section of the medium storage is back-vented
  • Pressure regulator with secondary ventilation kept constant.
  • compressed air can escape via the pressure regulator when the hydraulic section of the accumulator is filled and the sealing element is displaced in the direction of the pneumatic section.
  • the pneumatic pressure which is constantly regulated via the back-venting pressure regulator, ensures that the sealing element is pressed in the direction of the hydraulic section when medium is removed from the reservoir.
  • the pressure remains constant on both the hydraulic and the pneumatic side.
  • the sealing element is connected to a continuous displacement sensor, for example a cable pull sensor. The position sensor can be used to determine where the sealing element is located within the reservoir and thus how much medium is contained in the hydraulic section of the reservoir.
  • the device is preferably part of a supply system, the supply system also having a container with a pump in addition to the device. With this pump, the medium is fed from the container into the device, the device being used to check whether there is air in the medium. Due to the very simple and compact design, this supply system is very easy to maintain.
  • the invention also relates to a method for detecting air bubbles in a highly viscous medium and for discharging air-free medium from the device while maintaining a continuous one
  • a highly viscous medium is provided and passed into a device -
  • a pressure regulator connected to an input of the device
  • the input pressure of the medium is brought to about 10 6 Pascal or less, preferably to 7 * 10 5 Pascal
  • the volume flow of the medium is throttled to a value of approx. 0.1 l / min by means of a throttle orifice connected to the pressure regulator
  • the medium is fed into a collecting container if the medium contains air bubbles, or the medium, if it contains no air bubbles, is introduced into a storage device or conveyed from the device to an application location by means of a high-pressure pump.
  • the line also preferably has a very small diameter, for example 3 to 6, preferably 4 mm. Since the device has a memory, the medium can be dispensed continuously, so that the container of the supply system can also be changed without any problem, without the supply of medium having to be interrupted. It is also advantageous that only that part of the medium which contains air bubbles is removed, because the monitoring takes place online. It is therefore detected at all times whether there are air bubbles in the medium.
  • the medium is preferably passed over a first throttle orifice, which is arranged between the pressure regulator and the sensor and with which the flow rate of the medium is limited to approximately 0.1 l / min.
  • Volume flow of the medium enables optimal detection of the air bubbles enclosed in the medium with the help of the downstream sensor.
  • the air-free medium is furthermore preferably passed through a second throttle diaphragm.
  • This second throttle orifice further reduces the pressure of the medium in the line, preferably to approximately 1.5 * 10 5 Pascals.
  • Figure 1 is a schematic view of a supply system with a
  • Figure 2 shows a medium memory of the device
  • FIG. 3 shows a section of the medium memory shown in FIG. 2
  • FIG. 4 shows a variant of the section of the section shown in FIG.
  • a supply system 1 is shown schematically in FIG.
  • This supply system 1 comprises a container 2, for example a barrel, in which a highly viscous medium, for example a lubricant in the form of a grease, is provided.
  • a pump 3 By means of a pump 3, the medium is introduced via a line 4 into a device 5, in which a Sensor 11 can be detected whether the medium contains air or not.
  • the highly viscous medium is introduced into the device 5 with an inlet pressure of preferably 8 * 10 6 to 1.5 * 10 7 Pascals and a flow rate of 1 to 300 l / min.
  • a shut-off valve 7 is provided, with which it is possible to prevent the inflow of medium into the device 5 if necessary. From the shut-off valve 7, the medium can reach a pressure regulator 8 via a line 9 in the device 5.
  • Pressure regulator 8 the input pressure is about 7 * 10 5 Pascal
  • the setpoint of the pressure regulator can either be set manually or specified automatically via a control unit 10. With about 7 * 10 5 Pascal the medium runs through itself
  • the first throttle orifice 52 Interaction of pressure and resistance of the orifice (not shown) of the first throttle orifice 52 throttled to a volume flow of approximately 0.1 l / min.
  • the first throttle orifice 52 and the pressure regulator 8 form a first media volume flow regulator 54.
  • the throttling of the flow speed ensures that any air bubbles trapped in the medium can be correctly detected by the subsequent sensor 11.
  • This sensor 11 is preferably designed as an ultrasonic air bubble sensor and checks this through line 9
  • the lines 9 and 13 are part of a line system 9, 13 with which the medium can be transported within the device 5.
  • a second throttle orifice 53 ensures an accumulation pressure in the medium flow on an inlet side 56 and thus reduces the pressure to a value of approximately 1.5 * 10 5 Pascals on an outlet side 57 Discharge via the valve 12 into the line 13 and prevent sudden expansion of enclosed air bubbles, through the valve 15 still open at the time of the detection.
  • the second throttle diaphragm 53 and the valve 15 form a second media volume flow controller 55.
  • the valve 12 remains closed and the medium is guided via the open valve 15 along the line 9 to a medium storage device 16.
  • the medium storage 16 is itself pressurized.
  • Throttle diaphragm 53 and the high pressure pump 17 is kept constant.
  • a compressed air supply line 60 can also be seen, via which the pressure regulator 58 is supplied with compressed air.
  • the medium memory 16 has a fill level query (not shown) with which it can be determined how much medium the
  • Medium storage 16 contains.
  • the fill level of the medium store 16 can be continuously monitored and displayed, so that at any point in time a fill level signal shows how full the medium store 16 is.
  • the Control unit 10 determine the maximum permissible fill level of the media store 16, for example to one liter. If this fill level is reached, the control valve 10 can, for example, shut off valve 7
  • the shut-off valve 7 can be opened again, so that medium is again fed into the device 5 from the outside. Regardless of the level of the medium reservoir 16, the promotes
  • High pressure pump 17 the medium directly from the device 5.
  • the high-pressure pump 17 is arranged in front of an outlet 18 of the device 5 and serves to increase the outlet pressure of the medium again to above 8 * 10 6 Pascals.
  • the outlet pressure from the device 5 preferably corresponds to the original inlet pressure of the medium into the device 5.
  • the output pressure generated by the high-pressure pump 17 is manually or automatically by means of a
  • the medium should be used.
  • the medium can be transported to a machine, where the medium is then applied to appropriate components.
  • the device 5 advantageously has a touchscreen (not
  • Valves 7, 12, 15 are preferably pneumatic valves.
  • the fill levels of the collecting container 14 and of the medium reservoir 16 and the pressure of the medium in the can also be shown on the touchscreen
  • the Device 5 are displayed and the maximum level of the Medium storage 16 can be configured. It is also advantageous that the device 5 can be used to determine how long it takes to discharge the air-free medium from the device 5.
  • the ratio of medium to air (in percent) can also be determined within certain periods, for example within the last 10 or 60 minutes.
  • the ratio of air in the medium can also be displayed on the touchscreen.
  • the sensitivity of sensor 11 with regard to air bubble detection can also be set via the touchscreen.
  • the method for detecting air bubbles in the highly viscous medium and for discharging the air-free medium from the device comprises the following successive steps:
  • a highly viscous medium is provided and fed into the device 5.
  • the pressure regulator 8 which is provided at the inlet 6 of the device 5
  • the inlet pressure of the medium is reduced to approximately 7 * 10 5 Pascals by that in the medium
  • the medium passes through a first throttle orifice 52, by means of which the flow velocity of the medium is reduced to approximately 0.1 l / min in order to enable the air bubbles enclosed in the medium flow to be correctly identified with the aid of the downstream sensor 11.
  • a first throttle orifice 52 by means of which the flow velocity of the medium is reduced to approximately 0.1 l / min in order to enable the air bubbles enclosed in the medium flow to be correctly identified with the aid of the downstream sensor 11.
  • Control unit 10 directs the medium into the collecting container 14 if the medium contains air bubbles, or the medium if it contains no air bubbles through the second throttle diaphragm 53 into one
  • Line area of line 9 passed at a lower pressure. From here, the air-free medium either gets into the medium reservoir 16, or it is channeled out of the device 5 into a line 20 again by the high-pressure pump 17. The medium is then transported to a location where it is needed.
  • the line 20 can have a plurality of branch lines 21 to 24, via which the medium directly to a corresponding one
  • Application site 25 to 28 is transported.
  • the line 20 and the Branch lines 21 to 24 do not belong to the device 5, but are part of the supply system 1.
  • the branch lines 21 to 24 each have a metering valve (not shown in FIG. 1 for the sake of clarity), with which the desired amount of medium, for example on a component, can be applied.
  • a 3/2-way valve can also be provided instead of the two valves 12, 15 or that the two valves 12, 15 form a 3/2-way valve.
  • FIG. 2 shows the medium storage 16 of the device 5 in a detailed view.
  • the medium storage 16 comprises a first cover 30 and a second cover 31 opposite the first cover 30, a side wall 50 being attached between the covers 30, 31.
  • the medium reservoir 16 is divided into a hydraulic section 32 and a pneumatic section 33.
  • a movable sealing element 34 is arranged between the hydraulic section 32 and the pneumatic section 33 and can be moved in the direction of the arrows 35 or 36.
  • compressed air for example with 6 * 10 5 Pascal, is introduced into the pneumatic section 33 in order to move the sealing element 34, which preferably has the shape of a piston, in the direction of the arrow 36; or the compressed air is removed from the pneumatic section 33 to the
  • Air-free medium can be introduced into the hydraulic section 32 via the line 9, since an opening (not shown in FIG. 2) is provided in the cover 30, through which the medium can reach the section 32 from the line 9.
  • the sealing element 34 is moved in the direction of the arrow 35, as a result of which the medium is drawn into the hydraulic section 32. If the medium is to be removed from the hydraulic section 32 again, the sealing element 34 is moved in the direction of the arrow 36. The medium is thus from the hydraulic section 32 back into line 9
  • the sealing element 34 is a continuous displacement sensor 37 to
  • the position sensor 37 can be used to determine where the sealing element 34 is located within the medium reservoir 16. It can also be used to determine how much medium is in the hydraulic section 32.
  • FIG. 3 shows a section of the medium memory 16 shown in FIG. 2 (see FIG. 2), the side wall 50 and the section 30 of the
  • the sealing element 34 comprises a first sealing device 38 for the pneumatics and a second sealing device 39 for the hydraulics.
  • Each of the sealing devices 38, 39 comprises a seal 40 or 41 and a
  • An atmospheric pressure region 44 is provided between the two sealing devices 38, 39. This atmospheric pressure area 44 serves as an additional security area.
  • Guide bands 42, 43 serve to guide the sealing element 34 along the side wall 50 and ensure that the sealing element 34 does not tilt in the side wall 50.
  • the hydraulic section 32 arrives because this prevents the seal 41. Since the sealing device 38 has an opening 49, medium or excess air pressure can be discharged again via this opening 49 if this has reached the pressure region 44.
  • the opening 49 of the sealing device 38 is with a connection 46 for a winding tube (not shown). The medium entering the atmospheric pressure region 44 or the excess air pressure can be discharged from the pressure region 44 and thus also from the medium reservoir 16 via this winding tube.
  • FIG. 4 shows a variant of the section of FIG
  • this variant additionally has a winding tube 45 for removing medium or excess air pressure from the atmospheric pressure region 44.
  • the side wall 50 and the section 30 of the medium reservoir 16 are again not shown in FIG. 4.
  • the winding tube 45 is fastened with a first end 47 to the connection 46 and with a second end 51 with a further connection 48, the connection 48 being arranged on the cover 31.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Coating Apparatus (AREA)

Abstract

L'invention concerne un dispositif (5) destiné à un système d'alimentation en continu (1) en fluides hautement visqueux, en particulier en lubrifiants, comprenant un système de conduites (9, 13) de transport d'un fluide hautement visqueux qui présente une entrée (6) et une sortie (18) du fluide, le dispositif (5) comprenant : - un régulateur de pression (8) qui est agencé au niveau de l'entrée (6) et qui permet de régler une pression d'entrée du fluide dans le dispositif (5) à environ 7*105 pascals, - un capteur (11) qui se raccorde au régulateur de pression (8) et permet de détecter des bulles d'air dans le fluide, - un premier diaphragme d'étranglement (52) qui est agencé entre le capteur (11) et le régulateur de pression (8) et permet de réduire la vitesse d'écoulement du fluide à environ 0,1 l/min, - une unité de commande (10) au moyen de laquelle le fluide est dirigé dans un réservoir collecteur (14) en passant par une conduite (13) quand le fluide contient des bulles d'air, - un second diaphragme d'étranglement (53) qui forme avec une soupape (15) un second régulateur de flux volumique (55) du fluide. Le second régulateur de flux volumique (55) du fluide est agencé entre le capteur (11) et une pompe haute pression (17), la pompe haute pression (17) est agencée en amont de la sortie (18) et permet de régler la pression de sortie du fluide à plus de 107 pascals, et un réservoir de stockage (16) de fluide permet de stocker le fluide ne contenant pas d'air.
PCT/DE2019/100871 2019-01-22 2019-10-08 Dispositif destiné à un système d'alimentation en continu en fluides hautement visqueux WO2020151776A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112019006710.9T DE112019006710A5 (de) 2019-01-22 2019-10-08 Vorrichtung für ein kontinuierliches Versorgungssystem von hochviskosen Medien

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019101529.4A DE102019101529A1 (de) 2019-01-22 2019-01-22 Vorrichtung für ein kontinuierliches Versorgungssystem von hochviskosen Medien
DE102019101529.4 2019-01-22

Publications (1)

Publication Number Publication Date
WO2020151776A1 true WO2020151776A1 (fr) 2020-07-30

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PCT/DE2019/100871 WO2020151776A1 (fr) 2019-01-22 2019-10-08 Dispositif destiné à un système d'alimentation en continu en fluides hautement visqueux

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DE (2) DE102019101529A1 (fr)
WO (1) WO2020151776A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6053285A (en) 1998-01-14 2000-04-25 G.P. Reeves, Inc. Apparatus for dispensing measured quantities of lubricant
US20070119657A1 (en) 2005-11-28 2007-05-31 Fanuc Ltd Lubricant supply device
WO2010017593A1 (fr) 2008-08-13 2010-02-18 Bob Ifield Holdings Pty Ltd Procédé et appareil pour purger de l'air provenant de systèmes de lubrification automatique
DE102010032010A1 (de) 2010-07-23 2012-01-26 Leopold Kostal Gmbh & Co. Kg Vorrichtung zur dosierten Ausbringung eines Schmierfettes
EP3414532A1 (fr) * 2016-01-18 2018-12-19 Graco Minnesota Inc. Surveillance continue de niveau de réservoir

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6053285A (en) 1998-01-14 2000-04-25 G.P. Reeves, Inc. Apparatus for dispensing measured quantities of lubricant
US20070119657A1 (en) 2005-11-28 2007-05-31 Fanuc Ltd Lubricant supply device
WO2010017593A1 (fr) 2008-08-13 2010-02-18 Bob Ifield Holdings Pty Ltd Procédé et appareil pour purger de l'air provenant de systèmes de lubrification automatique
DE102010032010A1 (de) 2010-07-23 2012-01-26 Leopold Kostal Gmbh & Co. Kg Vorrichtung zur dosierten Ausbringung eines Schmierfettes
EP3414532A1 (fr) * 2016-01-18 2018-12-19 Graco Minnesota Inc. Surveillance continue de niveau de réservoir

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Publication number Publication date
DE112019006710A5 (de) 2021-10-28
DE102019101529A1 (de) 2020-07-23

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