EP3981988A1 - Système de pompe et procédé de fonctionnement d'un système de pompe - Google Patents

Système de pompe et procédé de fonctionnement d'un système de pompe Download PDF

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Publication number
EP3981988A1
EP3981988A1 EP21199573.3A EP21199573A EP3981988A1 EP 3981988 A1 EP3981988 A1 EP 3981988A1 EP 21199573 A EP21199573 A EP 21199573A EP 3981988 A1 EP3981988 A1 EP 3981988A1
Authority
EP
European Patent Office
Prior art keywords
unit
liquid
vacuum pump
liquid delivery
pump system
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.)
Pending
Application number
EP21199573.3A
Other languages
German (de)
English (en)
Inventor
Carl STÄHLE
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.)
Frideco AG
Original Assignee
Frideco 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 Frideco AG filed Critical Frideco AG
Publication of EP3981988A1 publication Critical patent/EP3981988A1/fr
Pending 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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/041—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock the priming pump having evacuating action
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/041—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock the priming pump having evacuating action
    • F04D9/042—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock the priming pump having evacuating action and means for rendering its in operative
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Definitions

  • the invention relates to a pump system, in particular a self-priming pump system, according to the preamble of claim 1 and a method for operating a pump system according to the preamble of claim 13.
  • a pump system with a vacuum pump and a liquid pump is already known, the vacuum pump being operated dry and the liquid pump being wet and the vacuum pump filling a reservoir with liquid in an initial operating state by means of a negative pressure, the reservoir being fluidically connected to the liquid delivery unit and the Liquid flows by gravity from the reservoir to the liquid delivery unit.
  • the object of the invention consists in particular, but not limited to, advantageously further developing a generic device.
  • the object is achieved according to the invention by the features of claims 1 and 13, while advantageous configurations and developments of the invention can be found in the dependent claims.
  • the invention is based on a pump system, in particular a self-priming pump system, with a liquid delivery unit for delivering a liquid and with a vacuum pump unit which, at least in an initial operating state, is intended to supply the liquid delivery unit with the liquid.
  • the vacuum pump unit is intended, at least in the initial operating state, to transport a gas along the liquid delivery unit.
  • a pump system can advantageously be further developed by such a configuration.
  • a compact construction of the pump system can be achieved will.
  • additional reservoirs that are fluidically connected to the liquid delivery unit can be dispensed with.
  • the liquid delivery unit and the vacuum pump can be arranged directly one behind the other, which increases the space efficiency.
  • a “pump system” should be understood to mean a system which is intended to transport at least one liquid along a line system.
  • the pump system advantageously has at least one inlet and/or at least one outlet for the liquid, which particularly advantageously correspond to a supply line and/or a discharge line of the line system.
  • the inlet and/or the outlet could have a flange, by means of which the inlet and/or outlet can be connected to the inflow line and/or the outflow line.
  • the inlet and/or the outlet could be connectable to the inflow line and/or the outflow line by means of a positive fit. It would also be conceivable for the pump system to be firmly integrated into the line system.
  • the pump system could also be provided to pump the liquid into a reservoir, which could be used, for example, to transport the liquid or be designed as standing water.
  • the pump system is preferably used to transport residual water and/or dirty water and/or waste water and/or external water and/or rainwater and/or backwater and is particularly preferred for drainage, for example for the maintenance of systems that have tanks filled with liquid, or for flooding, application.
  • a “liquid transport unit” is to be understood as meaning a unit which is intended to transport a liquid, for example by displacement and preferably by flow-mechanical processes.
  • the liquid delivery unit could have at least one piston element for delivering the liquid.
  • the liquid delivery unit preferably has at least one liquid delivery rotor.
  • a "liquid-conveying rotor” is to be understood as meaning an element which, at least in the continuous operating state, undergoes a rotary movement and thereby provides the conveyance of the liquid.
  • the liquid conveying rotor can in particular be designed as any common type of impeller, for example as an axial or semi-axial or radial impeller.
  • the liquid delivery rotor could have a flat or curved shape, preferably the liquid delivery rotor has a spiral shape up.
  • the liquid delivery unit preferably has at least one centrifugal pump, in particular a centrifugal pump.
  • a “vacuum pump unit” should be understood to mean a unit which is intended to transport a gas and/or to generate a negative pressure.
  • the vacuum pump unit advantageously has at least one gas inlet through which the gas flows into the vacuum pump unit at least in the initial operating state, and at least one gas outlet through which the gas flows out of the vacuum pump unit at least in the initial operating state.
  • the gas could include, for example, an exhaust gas exiting the liquid and/or air, in particular ambient air.
  • the vacuum pump unit could have at least one piston element and/or stator element for transporting the gas.
  • the vacuum pump unit preferably has at least one gas delivery rotor.
  • a “gas conveying rotor” is to be understood as meaning an element which, at least in the initial operating state, undergoes a rotary movement and thereby provides the transport of the gas.
  • the vacuum pump unit particularly preferably has at least one screw pump with a single screw, as is used, for example, in vacuum toilets, with the gas delivery rotor particularly preferably forming the screw of the screw pump.
  • the vacuum pump unit could require a working pressure which is below atmospheric pressure, for example the vacuum pump unit could have a molecular pump.
  • the vacuum pump unit can preferably be operated under atmospheric pressure.
  • the vacuum pump could possibly have a working space which is sealed by oil and/or PTFE and/or an elastic membrane.
  • the vacuum pump unit could have a rotary vane pump and/or a locking vane pump and/or a scroll pump and/or a piston pump and/or a diaphragm pump.
  • the vacuum pump unit can only be operated in dry operation.
  • the vacuum pump unit can preferably be operated in dry operation and wet operation.
  • an “initial operating state” is to be understood as an operating state in which a liquid pumping effect of the liquid delivery unit is greatly reduced compared to a continuous operating state due to a lack of liquid to be pumped, specifically by at least 10%, preferably by at least 20%. and most preferably by at least 50%.
  • the vacuum pump unit preferably transports the gas along the liquid delivery unit in order to cause the liquid to flow along the liquid delivery unit, in particular to completely surround the liquid delivery unit with the liquid.
  • the liquid delivery unit is advantageously surrounded by the liquid at the end of the initial operating state, as a result of which the pump system changes to the continuous operating state in which liquid is continuously delivered.
  • "Provided” is intended to mean specially designed and/or equipped. The fact that an object is provided for a specific function should be understood to mean that the object fulfills and/or executes this specific function in at least one application and/or operating state.
  • the pump system has a housing unit in which the liquid delivery unit is arranged spaced apart by a gap, with the vacuum pump unit delivering the gas through the gap at least in the initial operating state.
  • the vacuum pump unit is advantageously also arranged in the housing unit; the gap between the liquid delivery unit and the vacuum pump unit is particularly advantageously arranged.
  • the housing unit preferably has a first accommodation space in which at least a large part of the liquid delivery unit is arranged, and a second accommodation space in which at least a large part of the vacuum pump unit is arranged and which are particularly preferably separated from one another by the gap.
  • the vacuum pump unit could be arranged in a further housing unit, which is connected to the housing unit through the gap, for example.
  • the gap is preferably part of the gas inlet. In this way, a simple construction of the vacuum pump unit can be achieved. Additional components for producing the gas inlet can advantageously be dispensed with.
  • the pump system could have two separate drive units, in particular each with its own drive housing unit, with a first drive unit driving the liquid delivery unit and a second drive unit driving the vacuum pump unit at least in the initial operating state, or for a drive unit of the pump system to exclusively drive the vacuum pump unit in the initial operating state .
  • the pump system has a drive unit which drives the liquid delivery unit and the vacuum pump unit at least in the initial operating state, in particular simultaneously.
  • the drive unit advantageously has precisely one drive housing unit, within which at least one drive means for driving the liquid delivery unit and/or the vacuum pump unit is at least partially arranged.
  • the drive means could have a piston element, for example.
  • the drive unit could have an internal combustion engine; the drive unit preferably has an electric motor.
  • the drive unit could have at least one linear motor. In this way, a compact configuration of the drive unit can be achieved.
  • the drive unit drives the liquid delivery unit and the vacuum pump unit, in particular simultaneously, in a continuous operating state that follows the initial operating state, in particular without interruptions such as switching the drive unit off and/or on.
  • the continuous operating state is preferably provided exclusively for conveying the liquid. It would be conceivable that initial operation of the liquid delivery unit and/or vacuum pump unit in the initial operating state differs from continuous operation of the liquid delivery unit and/or vacuum pump unit in the continuous operating state, for example by a drive power provided by the drive unit or a drive means used by the drive unit.
  • the initial operation and the continuous operation are particularly preferably identical to one another; in particular, the initial operation and the continuous operation differ only by a position of the gas and the liquid relative to the liquid delivery unit.
  • additional components of the drive unit for switching between different operating modes can be dispensed with.
  • the drive unit has a drive shaft, which is provided for driving the liquid delivery unit and the vacuum pump unit. It would be possible for the drive unit to have a further drive shaft, which is provided at least to drive the vacuum pump unit, in particular, the vacuum pump unit could have at least one screw pump.
  • the drive unit preferably has exactly one drive shaft. As a result, a construction of the drive unit can be further simplified. The number of drive means of the drive unit can advantageously be reduced.
  • liquid delivery unit and/or the vacuum pump unit could be indirectly operatively connected to the drive shaft, for example via at least one gear; alternatively, the liquid delivery unit and/or the vacuum pump unit could be designed as stators corresponding to the drive shaft. In order to further simplify the design of the pump system, it is proposed that the liquid delivery unit and the vacuum pump unit be operatively connected directly to the drive shaft.
  • the drive unit is free of components arranged between the drive shaft and the liquid delivery unit or vacuum pump unit, which can be connected from the drive shaft to at least one component of the liquid delivery unit and /or change the rotational movement transmitted to the vacuum pump unit, for example by changing the direction of rotation and/or changing the angular velocity.
  • the drive unit could have at least one hub for mounting the liquid delivery unit and/or vacuum pump unit on the drive shaft.
  • liquid delivery unit and/or the vacuum pump unit could be formed at least partially in one piece with the drive shaft.
  • two components are “partially one-piece” should be understood to mean that the components have at least one, in particular at least two, advantageously at least three common elements that are part, in particular functionally important part, of both units.
  • additional components of the drive unit for coupling the liquid delivery unit and/or vacuum pump unit to the drive shaft such as gears and/or gears, can be dispensed with.
  • the liquid delivery rotor is in particular directly operatively connected to the drive shaft. It would be conceivable for the liquid delivery rotor to be in one piece with the drive shaft is formed, for example as a helical elevation of the drive shaft.
  • the liquid feed rotor has a hub by means of which the liquid rotor is mounted on the drive shaft, preferably at one end of the drive shaft. The gap is advantageously arranged between the hub and the housing unit. In this way, the liquid delivery unit can be driven by the drive shaft in a simple manner.
  • the gas conveying rotor is operatively connected directly to the drive shaft. It would be conceivable for the gas delivery rotor to have a hub, by means of which the gas delivery rotor is mounted on the drive shaft.
  • the gas conveying rotor is preferably designed in one piece with the drive shaft.
  • the gas delivery rotor and the drive shaft could together form a rotary piston of a rotary piston pump; the gas delivery rotor is particularly preferably designed as a helical elevation of the drive shaft, with the gas delivery rotor and the drive shaft jointly forming a screw of a screw pump.
  • the vacuum pump unit preferably has at least one pump housing unit, which accommodates the gas delivery rotor and can in particular be designed in one piece with the housing unit.
  • the pump housing unit is in the form of a stator and, for example, to have a counter-thread that corresponds to the gas delivery rotor.
  • the pump housing unit is preferably flat; the pump housing unit particularly preferably has a tube which in particular defines the second receiving space and within which the gas delivery rotor is arranged.
  • the drive shaft is advantageously arranged eccentrically with respect to the pump housing unit, in particular with respect to the pipe.
  • a distance between the gas delivery rotor and a first wall of the pump housing unit is particularly advantageously greater than a distance between the gas delivery rotor and a second wall of the pump housing unit opposite the first wall.
  • the first wall is preferably arranged on an upper side of the pump housing unit and the second wall is arranged on an underside of the pump housing unit.
  • the vacuum pump unit can be driven by the drive shaft in a simple manner.
  • a high suction force of the vacuum pump unit can advantageously be achieved by means of the eccentric arrangement of the drive shaft and the gas conveying rotor.
  • the vacuum pump unit prefferably has at least one sealing element for sealing the vacuum pump unit, which, for example, at the beginning of the Permanent operating condition seals the gap.
  • the vacuum pump unit be self-sealing by means of a liquid, preferably the liquid.
  • the fact that the vacuum pump unit is "self-sealing" by means of a liquid should be understood to mean that the gap is impermeable to liquid and when the vacuum pump unit is in operation, a liquid film sealing the gas inlet is formed.
  • the liquid film consists of liquid flowing after the gas after the transport of the gas.
  • the liquid film can consist of liquid arranged within the vacuum pump unit and accelerated by the gas delivery rotor to the gas inlet. This makes it possible to prevent the conveyance of the liquid through the vacuum pump unit from being obstructed in a simple manner. Additional components for sealing the vacuum pump unit can advantageously be dispensed with.
  • the pump system particularly advantageously has a non-return valve which is arranged at a liquid outlet of the liquid delivery unit.
  • the check valve is preferably sealed in the direction of the liquid delivery unit and permeable away from the liquid delivery unit.
  • the check valve is advantageously designed as a check ball valve.
  • the non-return valve could be designed as another type of non-return valve known to those skilled in the art, for example a non-return flap valve or a non-return poppet valve.
  • the check valve preferably has a receiving space which is arranged away from a line for conveying the liquid and which accommodates a check element of the check valve, for example a check ball, when the check valve is in an open state.
  • a design of the pump system can be further improved. Backflow of the liquid delivered by the liquid delivery unit can advantageously be prevented.
  • the check valve preloading a remaining check valve, in particular in order to keep the check valve closed.
  • the vacuum pump unit at least in the initial operating state, provide a negative pressure which keeps the non-return valve closed.
  • the non-return valve preferably has a passage on which the non-return element rests in a state of rest, with the negative pressure affecting the non-return element pressed onto the passage.
  • the gas outlet of the vacuum pump unit leads into a reservoir or into the environment.
  • a gas outlet of the vacuum pump unit is arranged behind the non-return valve with respect to a liquid conveying path.
  • the vacuum pump unit has at least one line which fluidically connects the working space to the gas outlet. In this way, clean operation of the vacuum pump can be ensured in a simple manner.
  • part of the liquid exiting through the gas outlet can be returned to a remaining liquid.
  • the invention is also based on a method for operating a pump system, in particular the pump system, with a liquid delivery unit, through which a liquid is delivered, and with a vacuum pump unit, through which the liquid delivery unit is supplied with the liquid at least in an initial operating state.
  • the pump system should not be limited to the application and embodiment described above.
  • the pump system can have a number of individual elements, components and units that differs from the number specified herein.
  • FIG. 1 shows a schematic representation of a pump system 10 in an initial operating state.
  • the pump system 10 is designed as a self-priming pump system.
  • the pump system 10 finds application in drainage.
  • the pump system 10 has a liquid delivery unit 12 .
  • the liquid delivery unit 12 serves to deliver a liquid 56.
  • the liquid 56 could be in the form of residual water and/or rainwater and/or extraneous water and/or backwater.
  • the pump system 10 has a liquid supply line 44 .
  • the liquid supply line 44 fluidly connects the rest of the pump system with the liquid 56.
  • the liquid supply line 44 is designed as a hose.
  • the liquid supply line 44 could be designed as a piece of pipe.
  • the liquid supply line 44 is immersed in an area (not shown) filled with the liquid 56 .
  • the area could be a basement to be pumped out and/or a fill tank to be serviced.
  • the pump system 10 could be free of liquid feed lines 44 and to be able to be connected to a separate liquid feed line.
  • the liquid supply line 44 could be designed as a reservoir line 46 .
  • the reservoir line 46 is also used to hold back part of the liquid 56 after operation of the liquid delivery unit 12 in order to prevent dry running when the liquid delivery unit 12 starts up again.
  • the pump system 10 has a liquid discharge line 48 .
  • the liquid discharge line 48 is designed as a hose. Alternatively, the liquid discharge line 48 could be designed as a piece of pipe.
  • the liquid discharge line 48 connects the rest of the pump system to a line system (not shown) for disposing of the liquid 56 that is pumped.
  • the line system could be part of a sewage system.
  • the liquid drain line 48 could connect the remainder of the pump system to a liquid reservoir, such as standing water or a disposal tank.
  • the pump system 10 could be free of liquid discharge lines 48 and connectable to a separate liquid discharge line.
  • the liquid delivery unit 12 defines a liquid delivery path 34 from the liquid supply line 44 to the liquid discharge line 48.
  • the liquid delivery unit 12 is designed as a centrifugal pump.
  • the liquid delivery unit 12 has a liquid delivery rotor 24 .
  • the liquid feed rotor 24 has a spiral shape.
  • the pump system 10 has a vacuum pump unit 14 .
  • the vacuum pump unit 14 serves to supply the liquid delivery unit 12 with the liquid 56.
  • the vacuum pump unit 14 serves to transport a gas along the liquid delivery unit 12.
  • the gas is in the form of air.
  • the vacuum pump unit 14 is designed as a screw pump.
  • the vacuum pump unit 14 has a gas delivery rotor 26 .
  • the gas conveying rotor 26 has a helical shape.
  • the vacuum pump unit 14 is designed as a known type of vacuum pump, as is used in particular for vacuum toilets.
  • the vacuum pump unit 14 is self-sealing by means of a liquid, which preferably corresponds to the liquid 56 .
  • a liquid which preferably corresponds to the liquid 56 .
  • the liquid supply line 44 is formed as a reservoir line 46
  • the retained portion of the liquid 56 could provide a permanent seal of the vacuum pump unit.
  • the vacuum pump assembly 14 could be non-self-sealing and allow some leakage of gas.
  • the pump system 10 has a housing unit 16 .
  • the housing unit 16 accommodates the liquid delivery unit 12 .
  • the housing unit 16 accommodates the gas conveying rotor 26 .
  • the housing unit 16 defines a liquid inlet 42 of the liquid delivery unit 12.
  • the housing unit 16 defines a liquid outlet 30 of the liquid delivery unit 12.
  • the liquid delivery unit 12 is spaced from the housing unit 16 by a gap 18.
  • the gap 18 separates a first receiving space 36 of the housing unit 16, in which the liquid delivery unit 12 is arranged, from a second receiving space 38, in which the gas delivery rotor 26 is arranged.
  • the gap 18 forms a gas inlet of the vacuum pump unit 14.
  • the pump system 10 has a drive unit 20 .
  • the drive unit 20 is designed as an electric motor.
  • the drive unit 20 could be designed as an internal combustion engine.
  • the drive unit 20 could also have several motors, which are arranged in a common housing.
  • the drive unit 20 drives the liquid delivery unit 12 and the vacuum pump unit 14 .
  • the drive unit 20 has a drive shaft 22 .
  • the drive shaft 22 serves to drive the liquid delivery unit 12 and the vacuum pump unit 14.
  • the liquid delivery unit 12 and the vacuum pump unit 14 are operatively connected directly to the drive shaft 22 .
  • the liquid transport rotor 24 is mounted to the drive shaft 22 by a hub 40 .
  • the gap 18 is located between the hub 40 and the housing unit 16 .
  • the gas delivery rotor 26 is designed as a helical prominence of the drive shaft 22 .
  • the pump system 10 has a check valve 28 .
  • the check valve 28 is arranged at the liquid outlet 30 of the liquid delivery unit 12 .
  • the check valve 28 prevents the liquid 56 from flowing back out of the liquid discharge line 48 .
  • the check valve 28 has a check element 50 .
  • the check element 50 is designed as a check ball.
  • the non-return element 50 could be designed as a non-return valve or a non-return plate.
  • the check element 50 rests on a seat (not shown) in a resting state.
  • the vacuum pump unit 14 has a gas outlet 32 .
  • the gas outlet 32 is arranged behind the check valve 28 with respect to the liquid conveying path 34 .
  • the vacuum pump unit 14 has a line 52 .
  • the line 52 connects the second receiving space 38 to the gas outlet 32.
  • the liquid supply line 44 is first immersed in the area and the liquid discharge line 48 is connected to the line system.
  • the drive unit 20 is then activated. After the drive unit 20 has been activated, the initial operating state is present.
  • the vacuum pump unit 14 transports the gas along the liquid delivery unit 12 and through the gap 18. A pumping effect of the liquid delivery unit 12 is negligible due to a lack of liquid 56 to be delivered.
  • the vacuum pump unit 14 transports the gas along the liquid delivery unit 12 in order to cause the liquid 56 to flow out of the liquid supply line 44 .
  • the gas flows through the gap 18, through the vacuum pump unit 14 and out of the gas outlet 32 into the liquid discharge line 48.
  • the liquid 56 collects in the first receiving space 36.
  • the vacuum pump unit 14 provides a negative pressure which keeps the check valve 28 closed. The negative pressure causes the non-return element 50 to be pressed against the seat.
  • figure 2 12 shows the pump system 10 in a continuous operating state following the initial operating state.
  • the steady state immediately follows the initial state.
  • the following explanations relate explicitly to the continuous operating state of the pump system 10.
  • the drive unit 20 drives the liquid delivery unit 12 and the vacuum pump unit 14 further.
  • the liquid delivery unit 12 is surrounded by the liquid 56 .
  • the liquid delivery unit 12 delivers the liquid 56 from the liquid supply line 44 to the liquid discharge line 48.
  • a pumping effect of the vacuum pump unit 14 is negligible.
  • the gap 18 is largely sealed off by the liquid 56 .
  • the gap 18 is sealed by the liquid 56.
  • the gap 18 could be sealed by a further liquid, which could in particular be part of the liquid 56 and is arranged inside the second receiving space 38 and which the gas conveying rotor 26 transports in the direction of the gap 18 .
  • the liquid supply line 44 is formed as a reservoir line 46
  • the retained portion of the liquid 56 could provide a permanent seal of the vacuum pump unit 14 .
  • the check valve 28 is open. The check element 50 is pressed into a receiving space 54 of the check valve 28 by the flowing liquid 56 .
  • FIG 3 shows a schematic progression diagram of a method for operating the pump system 10.
  • a first operating step 100 the pump system 10 is in the initial operating state.
  • the first operating step 100 is initiated by switching on the drive unit 20 .
  • the gas is transported through the vacuum pump unit 14 .
  • the pumping action of the liquid delivery unit 12 is equal to zero.
  • the first operating step 100 ends with the sealing of the gap 18 by the liquid 56 flowing in.
  • a second operating step 110 the pump system 10 is in the continuous operating state.
  • the second operating step 110 immediately follows the first operating step 100.
  • the liquid delivery unit 12 delivers the liquid 56.
  • the pumping effect of the vacuum pump unit 14 is equal to zero.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Transportation (AREA)
EP21199573.3A 2020-10-02 2021-09-28 Système de pompe et procédé de fonctionnement d'un système de pompe Pending EP3981988A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020125805.4A DE102020125805A1 (de) 2020-10-02 2020-10-02 Pumpensystem und Verfahren zum Betrieb eines Pumpensystems

Publications (1)

Publication Number Publication Date
EP3981988A1 true EP3981988A1 (fr) 2022-04-13

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Application Number Title Priority Date Filing Date
EP21199573.3A Pending EP3981988A1 (fr) 2020-10-02 2021-09-28 Système de pompe et procédé de fonctionnement d'un système de pompe

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