WO2019201885A1 - Pompe comprenant une chambre à produit - Google Patents

Pompe comprenant une chambre à produit Download PDF

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Publication number
WO2019201885A1
WO2019201885A1 PCT/EP2019/059731 EP2019059731W WO2019201885A1 WO 2019201885 A1 WO2019201885 A1 WO 2019201885A1 EP 2019059731 W EP2019059731 W EP 2019059731W WO 2019201885 A1 WO2019201885 A1 WO 2019201885A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
product
pump
sealing
shaft
Prior art date
Application number
PCT/EP2019/059731
Other languages
German (de)
English (en)
Inventor
Christoph Schmid
Original Assignee
Henkel Ag & Co. Kgaa
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 Henkel Ag & Co. Kgaa filed Critical Henkel Ag & Co. Kgaa
Publication of WO2019201885A1 publication Critical patent/WO2019201885A1/fr

Links

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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps

Definitions

  • the invention relates to a pump with at least one product chamber for a product to be pumped, wherein the pump can be designed in particular as a rotor pump.
  • rotor pumps are used to pump fluids such as
  • rotor pumps such as rotary or rotary piston pumps
  • Radial piston pumps, centrifugal pumps and eccentric rotor pumps are typically made of stainless steel and may be chrome plated, for example. Through the use of stainless steel and possibly the
  • Coating is given very good chemical and mechanical compatibility, for example to all adhesives, so that rotor pumps can be used for a variety of fluids to be pumped.
  • the invention is therefore based on the object to provide a pump with which problematic adhesives such as cyanoacrylates can be pumped, with an inadvertent curing of the adhesive is prevented within the pump.
  • a pump having a product chamber for a product to be pumped, the pump further comprising at least one sealing chamber.
  • the sealing chamber is designed as a barrier chamber filled with a barrier fluid and sealed by a first seal against the product chamber.
  • a barrier liquid is a
  • Solvent intended for the product to be pumped.
  • the pump has the advantage that effectively prevented by the held in the sealing chamber as a barrier liquid solvent that cures the product to be pumped in the sealing chamber.
  • the pump is therefore particularly suitable for pumping cyanoacrylates. It is also particularly suitable for pumping other, especially non-water-soluble adhesives.
  • the pump may in particular be designed as a rotor pump and have a shaft which is guided through the product chamber and through the sealing chamber, wherein the first seal is formed as a shaft seal, through which the shaft is guided.
  • the first seal is formed as a shaft seal, through which the shaft is guided.
  • the shaft seal is designed as a radially sealing shaft seal.
  • the sealing chamber can be sealed against the environment, for example by means of a further seal, in particular a further shaft seal.
  • a further seal in particular a further shaft seal.
  • the shaft seal is designed as a radially sealing shaft seal.
  • the shaft is vertical or substantially vertical, and the sealing chambers are above the product chamber, i. at a higher level than that
  • a substantially vertical course of the shaft is understood here and below to mean that the shaft forms an angle of not more than 20 ° with the vertical.
  • This embodiment has the advantage that leakage is particularly effectively prevented, in particular at the first seal, because gravity acts to assist.
  • the pump further comprises at least one further sealing chamber, wherein the further sealing chamber is formed as a filled with a pressure medium pressure chamber and sealed by a second seal against the first sealing chamber, wherein pressure compensation means are provided between the product chamber and the pressure chamber, so that a pressure difference between the product chamber and the pressure chamber is substantially equal to zero.
  • the pump thus comprises at least two sealing chambers. However, it may also comprise more than two sealing chambers, so that, for example, more than a first sealing chamber or more than a second sealing chamber or one or more further sealing chambers are provided.
  • the pump has the advantage that due to the pressure equalization taking place between the product chamber and the pressure chamber and the resulting virtually nonexistent pressure difference between the product chamber and the pressure chamber, no leakage occurs on the first seal and on the second seal. Thus, it is effectively prevented that the product to be pumped through the first seal in the first sealing chamber and optionally from there also in the second sealing chamber crossing and there undesirably cured.
  • the pump is therefore particularly suitable for pumping cyanoacrylates or anaerobic acrylates. In addition, it is also suitable for pumping other products, but the particularly good sealing effect of the arrangement with two sealing chambers means that even problematic products can be pumped with it.
  • the pressure compensation means are designed as a compensation reservoir.
  • the balancing reservoir is hydraulically with both the product chamber and with the
  • the compensation reservoir thus contains, on the one hand, the product to be pumped and, on the other hand, the pressure medium, for example compressed air, the level of the product stored in the compensation reservoir being equal to the volume of the fluid contained in the second sealing chamber, i. the pressure chamber, and the reproached in the compensation reservoir compressed air is dependent. If leakage occurs in the second sealing chamber and compressed air escapes, this will increase
  • a level control can be carried out by compensating the compressed air leakage by supplying external compressed air.
  • the compressed air supply of the product reservoir is used. Due to the static and dynamic pressure loss of the product supply, this compressed air pressure is always minimally greater than the product pressure at the pump inlet. This will be a
  • Level control of the product in the balancing reservoir is possible because the product is conveyed back to the product reservoir in the product supply line.
  • the product level in the compensation reservoir can be monitored in particular by means of a sensor.
  • a sensor for this purpose, for example, a capacitive sensor can be used.
  • the sensor can In particular, have a switching output and control a control valve that the
  • Level control executes by supplying compressed air.
  • possibly already advantageous monitoring of the product level in the compensation reservoir can be advantageously used to monitor the sealing effect in the second sealing chamber, in particular the effect of a third seal which seals the second sealing chamber to the outside.
  • the compensation reservoir can in particular be connected via a control valve with a compressed air supply to a supply of external compressed air for a level control in
  • the compressed air supply can in particular be the compressed air supply of the product reservoir.
  • the control valve can be designed in particular as a 3/2-way valve. As a control valve, in particular a solenoid valve can be used.
  • the described pump is used for pumping cyanoacrylates. It is used as a barrier liquid in the first sealing chamber
  • such a barrier liquid has such a low viscosity that without
  • This barrier liquid prevents the whereabouts and the ingress of moisture and prevents the penetration and curing of the product.
  • Figure 1 shows schematically a diagram of a pump according to an embodiment of the invention
  • Figure 2 shows schematically a diagram of a pump according to a second embodiment of the invention.
  • the pump 1 shows a schematic diagram of a pump 1 for a product to be pumped, wherein the pump 1 is particularly suitable for pumping cyanoacrylates.
  • the pump 1 is designed as a rotor pump and has a shaft 2 with a longitudinal axis L.
  • the longitudinal axis L is the shaft 2 passes through a product chamber 3 and promotes product 5 located in the product chamber 3.
  • the product 5 is also kept outside the product chamber 3 in a product reservoir, not shown in FIG. 1, which is connected to the product chamber 3 by a supply line 11.
  • the product chamber 3 is sealed by means of shaft sealing rings. To be a particularly good
  • two shaft sealing rings are provided, which are arranged one behind the other in the direction of the longitudinal axis L around the shaft 2: a first shaft sealing ring 6 and a second shaft sealing ring. 7
  • the sealing chamber 9 is formed as a barrier chamber and filled with a barrier liquid.
  • the barrier liquid is selected to match the product to be pumped 5 in the product chamber 3, wherein the barrier liquid is a solvent for the product 5.
  • the barrier liquid has a viscosity in the range of 1 mPas - 1 million mPas, most preferably in the range of 6 mPas - 15,000 mPas. If a cyanoacrylate is kept in the product chamber 3, a solvent for cyanoacrylates is used as barrier liquid, for example the solvent sold under the name Sicomet D-Bonder with a viscosity of 6 mPas.
  • the barrier liquid has the task of displacing moisture from the first sealing chamber and / or reducing friction and dissipating frictional heat, as well as preventing the hardening of small quantities of product entering the first sealing chamber.
  • the sealing chamber 9 is sealed by means of another shaft seal 7 to the outside.
  • FIG. 2 shows a pump 1 according to a further embodiment.
  • This pump 1 differs from that shown in Figure 1 in that it has a further sealing chamber 10 which is designed as a pressure chamber and is filled with compressed air.
  • three shaft sealing rings are provided, which are arranged one behind the other in the direction of the longitudinal axis L about the shaft 2: a first
  • the second sealing chamber 10 is formed.
  • the second sealing chamber 10 is designed as a pressure chamber and filled with a pressure medium, in the embodiment shown compressed air.
  • the second sealing chamber is sealed by means of the third shaft sealing ring 8.
  • the pressure medium has the task of maintaining the same pressure in the second sealing chamber 10 and thus on the second sealing ring 7, which also prevails in the product chamber 3.
  • a compensation reservoir 12 is provided as pressure compensation means between the
  • the compensation reservoir 12 is connected via a connecting line 13 to the product chamber 3, so that product 5 can enter the compensation reservoir 12.
  • the compensation reservoir 12 via a
  • first shaft seal 6 is used for pressure-free sealing between the product chamber 3 and the first sealing chamber 9.
  • the second shaft seal 7 serves for pressure-free sealing between the first sealing chamber 9 and the second sealing chamber 10.
  • the third shaft seal 8 serves for pressurized sealing between the second sealing chamber 10 and the environment.
  • the shaft 2 should be as perpendicular to the mirror as possible on the barrier liquid and should only deviate a maximum of 20 ° from the vertical. This can ensure that the sealing line on the shaft 2 is always completely covered with barrier fluid.
  • the product 5 is under pressure, which is maintained by a compressed air supply 20, which is connected via a pressure regulator 19 with the product reservoir 4 becomes.
  • the product pressure in the pump 1 is typically between 0 and 7 bar, preferably between 0.5 and 4 bar.
  • Such a product reservoir 4 is also provided in the pump 1 shown in FIG.
  • the product level in the compensation reservoir 12 is monitored by means of a sensor 16, in particular a capacitive sensor with switching output. If the product level rises above a specified limit, level control is performed by balancing the compressed air leakage with external compressed air.
  • the connecting line 14 is connected by means of a 3/2-way solenoid valve 17 with the compressed air supply 20 of the product reservoir 4.
  • the pressure of the compressed air supply 20 is always minimally greater than the product pressure at the pump inlet. This makes it possible to regulate the product level in the compensation reservoir 12 since the product is conveyed back into the product supply line 11 in the direction of the product reservoir 4.
  • the connecting line 14 is thus connected via the solenoid valve 17 to the compressed air supply 20 and compressed air is added until the level in the compensation reservoir 12 has been regulated to a desired value.
  • connection of the connecting line 14 with the compressed air supply 20 is disconnected again.
  • the connecting line 14 is then connected to a throttle valve 18 again, which can counteract the occurrence of overpressures and / or a manual venting of the product chamber allows and manual level control of the level in
  • the monitoring of the level of the product 5 in the compensation reservoir 12 by means of the sensor 16 can also be used to monitor the tightness or wear on the third shaft seal 8.
  • the time between two necessary level adjustments can be used to estimate the sealing effect of the third shaft seal 8.
  • the barrier liquid has a viscosity in the range of 1 mPas - 15,000 mPas, most preferably in the range of 6 mPas - 5,000 mPas.
  • a solvent for cyanoacrylates is used as barrier liquid, for example the solvent sold under the name Sicomet D-Bonder with a viscosity in the range of 6 mPas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

L'invention concerne une pompe (1) comprenant une chambre à produit (3) destinée à un produit à pomper, présentant par ailleurs au moins une chambre étanche (9), la chambre étanche (9) étant réalisée sous la forme d'une chambre de retenue remplie d'un liquide de retenue et étant rendue étanche vis-à-vis de la chambre à produit (3) au moyen d'une première garniture, un solvant étant employé en tant que liquide de retenue pour le produit à pomper.
PCT/EP2019/059731 2018-04-18 2019-04-16 Pompe comprenant une chambre à produit WO2019201885A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018205931.4 2018-04-18
DE102018205931.4A DE102018205931A1 (de) 2018-04-18 2018-04-18 Pumpe mit einer Produktkammer

Publications (1)

Publication Number Publication Date
WO2019201885A1 true WO2019201885A1 (fr) 2019-10-24

Family

ID=66240123

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/059731 WO2019201885A1 (fr) 2018-04-18 2019-04-16 Pompe comprenant une chambre à produit

Country Status (2)

Country Link
DE (1) DE102018205931A1 (fr)
WO (1) WO2019201885A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2557311A1 (de) * 1975-12-19 1977-06-30 Hauni Werke Koerber & Co Kg Abdichtung einer antriebswelle einer leimpumpe
DE29501263U1 (de) * 1995-01-27 1995-03-09 Abb Patent Gmbh, 68309 Mannheim Zahnradpumpe
DE102010009668A1 (de) * 2010-02-27 2011-09-01 Oerlikon Textile Gmbh & Co. Kg Zahnradpumpe
DE102014226429A1 (de) * 2014-12-18 2016-06-23 Eagleburgmann Germany Gmbh & Co. Kg Wellendichtungsanordnung einer Fluidmaschine sowie Verfahren zur Abdichtung einer Welle einer Fluidmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153160A (en) * 1961-02-09 1964-10-13 Borg Warner Submersible seal
DE2350931C3 (de) * 1973-09-26 1981-03-26 Vitalij Petrovič Irkutsk Černych Wellendichtung an einem druckbelasteten Arbeitraum
DE10143565B4 (de) * 2001-09-05 2014-10-30 Basf Se Verfahren zur Herstellung polymerisationsfähiger Verbindungen
DE10228859A1 (de) * 2002-06-27 2004-01-15 Basf Ag Verfahren zum Fördern einer wenigstens ein (Meth)acrylmonomeres enthaltenden Flüssigkeit F

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2557311A1 (de) * 1975-12-19 1977-06-30 Hauni Werke Koerber & Co Kg Abdichtung einer antriebswelle einer leimpumpe
DE29501263U1 (de) * 1995-01-27 1995-03-09 Abb Patent Gmbh, 68309 Mannheim Zahnradpumpe
DE102010009668A1 (de) * 2010-02-27 2011-09-01 Oerlikon Textile Gmbh & Co. Kg Zahnradpumpe
DE102014226429A1 (de) * 2014-12-18 2016-06-23 Eagleburgmann Germany Gmbh & Co. Kg Wellendichtungsanordnung einer Fluidmaschine sowie Verfahren zur Abdichtung einer Welle einer Fluidmaschine

Also Published As

Publication number Publication date
DE102018205931A1 (de) 2019-10-24

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