EP2589807A1 - Pompe à soufflet à plis - Google Patents

Pompe à soufflet à plis Download PDF

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Publication number
EP2589807A1
EP2589807A1 EP12191587.0A EP12191587A EP2589807A1 EP 2589807 A1 EP2589807 A1 EP 2589807A1 EP 12191587 A EP12191587 A EP 12191587A EP 2589807 A1 EP2589807 A1 EP 2589807A1
Authority
EP
European Patent Office
Prior art keywords
pump
bellows
plate
check valve
working space
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Withdrawn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
EP12191587.0A
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German (de)
English (en)
Inventor
Andreas Wild
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.)
Hofer Mechatronik GmbH
Original Assignee
Hofer Mechatronik 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
Priority claimed from DE202011051879U external-priority patent/DE202011051879U1/de
Priority claimed from DE202012100944U external-priority patent/DE202012100944U1/de
Application filed by Hofer Mechatronik GmbH filed Critical Hofer Mechatronik GmbH
Publication of EP2589807A1 publication Critical patent/EP2589807A1/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Withdrawn legal-status Critical Current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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/09—Pumps having electric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure

Definitions

  • the present invention relates to a pump with a bellows, in particular with a stainless steel bellows, wherein by using the longitudinal extent of the bellows promotion of a medium to be conveyed as fuel is feasible.
  • the present invention also teaches how even with low starting pressures a bellows pump according to the invention can be started.
  • pump A frequently used in motor vehicle, because at the same time simple, yet reliable within wide limits, pump is the type of diaphragm pump, which is also used in other fields of application.
  • Exemplary is the DE 195 22 943 A1 (Applicant: DAGMA Deutsche Automaten- und Getränkemaschinen GmbH; filing date: 23.06.1995) called the diaphragm pumps as so economically executable describes that they can be realized even in two-part design, of which in each case a part, namely the pumping chamber with valves, as Disposable device is assigned to replaceable beverage containers.
  • the properties of the rubber membrane on the viscosity of the medium to be delivered such as the viscosity of a mixed beverage adjusted.
  • Kenrokoro Urata, priority date: 20.08.19557 states that in a bellows together with two nozzles whose nozzle shapes are arranged in opposite directions, without any closing means due to the use of the viscosity of the liquids to be transported, the internal volume of the Bellows for Pumphübe can be used, provided that a parallel extending, the bellows enclosing coil spring for the function of the return spring generates a sufficient counterforce.
  • the material has fold bends, so kinks.
  • the DE 22 34 311 B recommends to improve the buckling effects that the wall thickness in the fold bends should be greater than the maximum thickness of the connecting wall sections.
  • a spring steel bellows for generating a displacement volume find a use in a pump volume space on which a plunger-like actuator applies force to promote the medium in the arranged outside of the spring steel bellows pressure chamber.
  • the plunger-type actuator is designed as a first component, separated from this is the bellows, which rests on the actuator. Only the bellows determines the pump volume.
  • Exemplary may be on the two property rights DE 10 2004 011 123 A1 (Applicant: Hydraulik-Ring GmbH, priority date: 02.09.2003) and DE 10 2006 044 254 B3 (Patentee: Thomas Magnete GmbH, filing date: 16.09.2006).
  • These diaphragm pumps have in particular in the promotion of more recently available fuels significant problems with the sooting of the Membrane surface over time, especially for fuels with an increased ethanol content. The sooting of such pumps can cause the pump to stop functioning and stop pumping liquid.
  • a bellows pump which is used as a pressure generator pump to build up a pump pressure with a fluid such as gasoline.
  • This bellows pump has a first, disposed within the bellows working chamber. This first working chamber should with a fluid such. B. gasoline are filled. There is a fluid connection to an inlet port provided with a check valve. Furthermore, this first working chamber is connected to an outlet opening, which is also provided with a check valve. Surrounding the bellows, a second working chamber is formed, which is to be filled with a working fluid.
  • the check valve By increasing the pressure in the second working chamber, a contraction of the bellows is to be effected, whereby the check valve opens in the outlet opening and fluid flows out of the first working chamber. If, subsequently, the pressure in the second working chamber is lowered, the check valve should close to the outlet opening and the check valve should open to the inlet opening. In this case, the bellows expands and fluid is sucked through the inlet opening into the first working chamber.
  • the pressure change in the second working chamber is achieved by a piston which is to be moved by an eccentric cam arranged on a motor shaft. By actuating a positioning member, the pressure which can be generated in the second working chamber can be changed.
  • the bellows in one mode of operation, is more contracted and also more expanded than in a second mode of operation, which increases the flow rate of the fluid.
  • it is in the in the DE 195 48 074 A1 described pump to a hydraulic booster pump, in which the bellows is used as a translation member.
  • the DE 18 66 945 U (Applicant: Kenrokoro Urata, priority date: 20.08.1957) describes a pump, such as a piston, diaphragm or bellows pump.
  • the pump has nozzles as inlet and outlet.
  • the nozzles ensure that no further controls are required at the inlet and at the outlet, for example to control valves.
  • the nozzles are designed as hydrodynamic alternating resistance.
  • a bellows pump is described.
  • an auxiliary spring is required, which is to provide a restoring force for the anchor.
  • FIG. 3 of the DE 18 66 945 U Due to the horizontal lines drawn in the bellows, it is clear that the bellows material may be a material that can wrinkle.
  • a pump as an alternative to the common, popular in the automotive field diaphragm pumps, which fulfills its task even when using a variety of fuels, for example as a fuel pump for parking heaters, and ideally offers increased uptime and operating times compared to commonly used diaphragm pumps ,
  • the pump should have a reduced susceptibility to interference.
  • the presently described pump is suitable for carrying out a delivery of a fuel.
  • the fuels used for spark ignition engines such. B. the type "gasoline engine” are determined, on the one hand additives and on the other hand so-called biological fuels such as ethanol mixed before these fuels enter the mass market to u. a. to reduce the mineral oil content to u. a. To ensure temperature stability of the fuel and u. a. To provide knock resistance to the fuel.
  • Such additives and alternative fuel components often cause deposits on the moving parts over time. The fact that the number of moving parts is reduced as much as possible, the risk of movement inhibition due to sooting in the presented pump is very much reduced.
  • a particularly easy-to-implement principle of promoting the individual pumping volumes is, with one-way valves - ie those valves which provide a flow in one direction, while in the other direction, z. B. by means Pressure control, a reflux is prevented - to protect the pumping volumes in a pressure level from a reflux to a lower pressure level.
  • the pump usually has different openings, of which at least one opening is a suction opening and at least one opening is an ejection opening.
  • a volume of the pump which has previously entered the interior of the pump via the suction opening, can be made available via the discharge opening to subsequent components and assemblies.
  • the arrangements of the devices for pressure control, z. As one-way valves, check valves or pressure control flaps, within the pump immediately after the discharge ports and the intake ports available. Depending on a pressure difference between the one and the other side of the pressure control device, the device enters an open position or a closed position and thus allows a pumping volume to flow past.
  • the facilities, in particular the valves of the device work independently, so self-sufficient.
  • the pump is equipped with a bellows, it can also be called a bellows pump. It is particularly advantageous if the bellows can be used directly for pumping a liquid such as diesel or gasoline or a conventional motor vehicle fuel.
  • the life of the bellows is increased when made of a durable material. So it makes sense to use a metallic bellows.
  • a material that is particularly resistant to corrosive influences is stainless steel.
  • a suitable embodiment of the bellows is to use a bellows made of the material stainless steel, so a stainless steel bellows. Experiments have shown that an austenitic stainless steel is particularly well available as a material for the stainless steel bellows. Stainless steels that can be installed for the bellows are z.
  • Alternative metals for the bellows are z. B. bronze.
  • Another material for the bellows is stainless steel type AM 350.
  • a bellows mounted inside the pump can be, for example, a corrugated stainless steel bellows with parallel corrugations.
  • the bellows could also be called corrugated pipe.
  • the bellows is corrugated.
  • the others named Materials can be wavy, accordion-like around an axis as Quasiendlos tube, preferably cut to length on the enclosure of the pumping volume in its longitudinal extent, in particular with a laser weld seam, produce.
  • the wall of the bellows has no kinks or zigzag folds, so it is kink-free, but is rounded at all points of their warping.
  • the corrugation of the bellows is similar to a sinusoid.
  • the course of the wall could also be described with the help of laterally along a longitudinal extent of the pump juxtaposed circular arcs, the open side with each arc alternately in a direction opposite to 180 ° direction.
  • the corrugated tube inhibits twists.
  • the corrugated tube is advantageously torsionally rigid.
  • the corrugated pipe is dimensionally stable.
  • a bellows to be used may be a single-walled bellows whose corrugations protrude up to 10% of the diameter.
  • the hose-like bellows has an interior.
  • the interior of the bellows is bounded by corrugations which are layered parallel to each other.
  • the interior enclosed by the bellows corresponds to the pump volume. Because the corrugated tube is torsionally rigid, a pump volume can always be defined.
  • the wall of the bellows advantageously has the same wall thickness at all points.
  • the corrugations extend in the transverse direction to the longitudinal extent of the bellows.
  • the longitudinal extent of the bellows is the preferred direction for the movement of the bellows. The greatest freedom of movement, the bellows in a direction parallel to the tubular central axis.
  • Every single curl can stretch and compress. Due to the stretching and compression of the entry depth of the waves in the interior, ie to the center of the interior - along the central axis - to, changed. It makes sense to use bellows that can withstand a load of more than 1.0 * 10 6 games without material failure. In other words, the bellows acts like a corrugated bellows.
  • the pumping volume of the pump is enclosed in at least one position, ie in a pumping position, by the bellows and bounded or closed by a plate at one end.
  • the interior is thus formed in one direction by the bellows and the plate.
  • the bellows flows into the plate.
  • Bellows and plate are connected with each other.
  • the plate is movably arranged in the pump housing. The plate is permanently in contact with the liquid in the delivery volume.
  • Such a designed pump is particularly well suited for the transport of fuels.
  • the pump has a low tendency to spoil fuel during operation due to the pumped medium. If fuel is to be pumped into a parking heater by the pump, the fuel pump, as a rule no particularly pressurized fuel is needed, but continuous, long-term delivery must be ensured.
  • the pumping volume is formed between different, the pump volume limiting components.
  • Such a component is the bellows, which represents an outer boundary of the pumping volume.
  • the bellows can be extended to different extents, especially during the pumping operation.
  • the bellows can be extended or shortened in a direction in which the respective pumping stroke also moves.
  • the bellows is stretchable in the direction of a pumping stroke.
  • the bellows can also be compressed in the direction of a pumping stroke. It can be chosen a so-called zero position in which the bellows already undergoes a certain compression. In the zero position, an actuator advantageously exerts no axial force. So there is a balance of power.
  • the bellows In the course of the intake stroke, the bellows can be converted from its compression into an elongation.
  • the bellows can z. B. be compressed so that it is only 20% of its total length (in zero position). The bellows can then be deflected so far that the bellows is extended up to 20%, sometimes even up to 80% above its zero position.
  • the pump stroke moves between 20% to 80% (compared to the zero position) stretched arrangement of the bellows and between 20% and 80% compressed arrangement of the bellows.
  • Another component for limiting the pumping volume is a plate.
  • the plate can not only be used as a limiting plate, but at the same time take on tasks of an electromagnetic anchor.
  • the plate in this case is an anchor plate.
  • Another outer boundary results z. B. by a bottom of the pump.
  • the pumping volume can thus hose-like, it can also be said, cylindrical, along the cylinder jacket enlarged and reduced.
  • Such a pump seeks their balance of power at one point by a displacement of the plate.
  • the plate is held or clamped from one side through the bellows.
  • the plate is influenced by the other side in their position by electromagnetic field lines.
  • the pump volume is formed by the fact that the plate is present in an equilibrium position.
  • the equilibrium position of the plate is produced by a spring force of the bellows and an electromagnetic counterforce (and more, acting on the plate forces).
  • the plate has on the one hand the function to limit the interior.
  • the plate is mechanically connected to an electromagnetic armature.
  • the plate can also be part of the electromagnetic anchor.
  • Plate and electromagnetic armature can be molded cohesively to a component. If the plate and the anchor are integrally formed into a component, fewer manufacturing steps for the production of the component necessary, than when using different materials for plate and anchor.
  • the armature is part of an electromagnetic actuator via which the pump stroke is adjusted and the pumping stroke is generated. Depending on where the plate is located inside the housing of the pump (relatively speaking), the respective pumping volume of the pump results.
  • a pure plate control which is very easy to implement electromagnetically, causes the desired pumping stroke. The number of moving parts is very much reduced. Components which are in contact with media to be conveyed, are materially bonded. Friction between the individual wetted components can thus be avoided.
  • the pump is temperature resistant. D. h., The pump withstands operating temperatures of at least 100 ° C, preferably 150 ° C or even higher temperatures.
  • a suitable operating temperature range is a temperature range between -20 ° C and 120 ° C. This makes the pump particularly suitable for use with fuels.
  • the pump can also be operated in the vicinity of combustion chambers, for example in a parking heater, without running the risk of overheating or even catching fire.
  • the bellows pump described above can be started very easily.
  • the bellows of the bellows pump opens in one embodiment in a plate.
  • the plate is movably available in the bellows pump.
  • the plate is tied to the bellows.
  • the bellows is firmly connected to the plate.
  • the plate is again movable, thus plate and bellows are movable in the bellows pump.
  • With a drive the plate is deflected.
  • the deflection of the plate is transferred to the bellows, the deflection in turn deflects the bellows.
  • Between bellows and plate is a pump room, which can also be referred to as work space. In other words, the bellows and the plate enclose a working space on different sides.
  • an electromagnetic control of the plate ie, a plate which operates as an armature or as a magnetic circuit in a magnetic circuit. It is also advantageous if the bellows moves directly electromagnetically via an electromagnetic lifting element, that is either compressed or stretched or alternately can be compressed and stretched.
  • the movement or the respectively assumed position position of the bellows is mediated by a plate.
  • a plate With the bellows a plate is firmly connected, but movably arranged in the pump housing.
  • the movement of the plate is caused by a drive.
  • the drive is used for deflection of the plate, in other words, the drive determines the respectively to be taken relative position of the bellows in the pump housing.
  • the interior of the bellows as pumping volume can be used.
  • a central component in the interior of the pump housing may be a base body.
  • the body may also extend into the area between the bellows and the plate.
  • the volume occupied by the body is not attributable to the interior of the bellows.
  • the basic body does not count to the interior.
  • the interior is limited to more than 90% of its axial extent on the one hand by the bellows and on the other hand by the base body in the radial direction.
  • the main body is used for attachment and storage.
  • the main body can be designed so that at least the first check valve is mounted in this body. Following the first check valve, an antechamber follows.
  • the prechamber adjoins the check valve.
  • the prechamber connects to the first check valve.
  • the prechamber can thus be inserted by means of a control through the plate for mounting the one check valve.
  • the prechamber intensifies the opening movement of the check valve by creating a negative pressure.
  • channels are present in the housing of the bellows pump in a particularly advantageous embodiment.
  • a channel may be referred to as an inlet channel.
  • the working space is hydraulically connected via an inlet channel.
  • the working space can pass on its fluid via the outlet channel.
  • the outlet channel can be connected to the working space.
  • the outlet channel connects to the workspace in a configuration state.
  • the first check valve is installed in the inlet channel.
  • the second check valve installed in the exhaust passage is another check valve, the second check valve installed.
  • the main body has in a particularly advantageous embodiment in the interior of the bellows pump such dimensions that at least the first check valve can be arranged in the base body.
  • the check valve is mounted in the body.
  • the opening of the check valve is carried out by a deliberate vacuum control.
  • the negative pressure is generated by an antechamber, in which the fluid can flow after a mounting of the check valve.
  • the negative pressure forms during a certain time in the bellows pump.
  • the prechamber is used for the negative pressure.
  • the first check valve is mounted by a phased negative pressure. The negative pressure caused by the pre-chamber, pulls the check valve in a passage position.
  • the bellows allows only a small pressure difference and thus only a small delivery height, a secure suction, especially in a start phase of the bellows pump, due to the negative pressure in a special section, which can open in a configuration in the working space, guaranteed.
  • the interior comprises at least one working space and an antechamber.
  • the pre-chamber is bordered or bounded by the base body and by the plate.
  • the prechamber spans between the plate and the main body. Depending on the position of the plate results in a dependent on the position size or dimension of the antechamber.
  • the prechamber goes over into the working space.
  • the antechamber communicates with at least one working space.
  • the diameter or the flow width can vary during operation.
  • a permanent, at least slight connection between the prechamber and working space remains, z. B. by a distance of less than 1 mm, z. B. of 3/10 mm between the plate and the body. Plate and body do not close completely. There remains a conscious gap between the plate and the body.
  • a permanent hydraulic connection between the prechamber and the working space can be created.
  • the antechamber opens into the working space.
  • the working space has a throttling area.
  • the working space is advantageously divided by a starter sleeve.
  • the starter sleeve has the shape of a cylinder jacket.
  • the starter sleeve encloses the body at least in sections. Depending on the desired throttle effect, a certain distance of the starter sleeve can be selected from the body.
  • the starter sleeve runs parallel along a stroke direction of the bellows.
  • the starter sleeve may extend into a transition region of the pre-chamber to the working space.
  • the starter sleeve is connected to the working space.
  • the starter sleeve may also be connected to the prechamber.
  • the starter sleeve is located between the bellows and the main body. Between the starter sleeve and the main body is the throttle area.
  • the starter sleeve stabilizes the bellows innwandig. As a result, length changes and tolerances of the bellows
  • the plate advantageously takes on additional functions.
  • the plate can serve as an attachment element for the bellows.
  • the plate provides a mechanical stabilizing effect for the bellows.
  • the bellows is prevented from collapsing at high external pressure ratios, outside the interior, through the plate.
  • the plate and the bellows are closed together by a connection.
  • Such a compound may be a material connection, for. B. a thermally produced welded joint (by laser welding).
  • the bellows has both liquid and gas, for example, hydrogen or helium, a sufficient conveying tightness. As a result, it looks as if the plate and the bellows are made in one piece (almost the same material).
  • the plate is made of a magnetizable material such as an alloy based on iron, nickel or cobalt, while the bellows z. B. can be made of a stainless steel. These different materials can then be glued, laser welded or soldered. As a result, a good, long-term stable inner shell for the pumping volume is formed, wherein the individual regions of the shell are tuned to the functions to be adopted by them.
  • the plate can advantageously be configured in multiple stages. It can also be said that for mechanical tracing or imaging, the shape of the plate follows the shape of the base.
  • the plate can have a stepped appearance.
  • the plate can be compared to a sink.
  • the plate can be considered as a tub-like piece.
  • a part of the plate has a projection in a direction as seen from a center axis of the plate.
  • the plate can be designed otherwise symmetrical, z. B. around a central point.
  • the plate can be equipped with an axial symmetry part. In other words, the symmetry refers to an axis of symmetry to be laid by the plate.
  • the plate is particularly inexpensive to produce, if the plate is a shaped sheet metal part, in particular a deep-drawn shaped sheet metal part.
  • the main body and the plate can be coordinated. If the steps of the slab are arranged at the same intervals as the slips on one side of the main body, the steps can nestle snugly against extensions of the main body. In such a case, it can also be said that the plate runs parallel to the projections and recesses of the basic body.
  • the bellows pump has a plate designed in such a way that the plate is matched as exactly as possible to the basic body.
  • the main body has similar symmetries on one side as the plate.
  • Body and plate have dimensions that fit together. At least part of the plate engages in a depression formed in the base body.
  • the recess is designed counter-symmetrically to the plate.
  • the plate has projections that fit on the recesses of the body. The plate protrudes into the recesses of the body. Rinses during the pump operating time are reduced by the fact that the flow conditions of the fuel in and out of the pump through channels to the interior of the pump are designed so that as few Turbulences arise.
  • a contribution to this can be made if at least one mouth of a channel is aligned with the suction and / or discharge opening parallel to an axial extension of movement of the bellows.
  • the bellows has an extension in the direction of movement. This extension of movement extends axially along the central axis of the bellows.
  • the channel leading to the pumping space or out of the pumping space can be arranged parallel to the direction of movement of the bellows. Energy losses due to flow deflections are reduced, which in turn contributes to the life of the pump.
  • the transition of the bellows in the housing bottom takes place in a favorable embodiment cohesively.
  • the bellows is thus clamped on two sides.
  • the bellows is the mediating component between the plate and the housing bottom.
  • the bellows limits the pumping volume.
  • the bellows also works as a spring.
  • the bellows works with its spring force against the coil force of a coil.
  • the housing bottom, the bellows with its inside and the plate with its pump side form the pumping volume, which can vary in size, in that the plate is locally displaceable.
  • the pump is designed to be closed to the outside by an outer shell of the pump is provided by a housing. Because a part of the housing, for. B. the housing cover, is set differently, so the freedom of movement and the force with which the pump cycle is performed, can be adjusted via the exact position of the housing cover.
  • the housing cover can in different positions on a trough-like counterpart, z. B. the case bottom, are placed.
  • a particularly advantageous embodiment is when the housing cover in the axial direction in different locking positions can be locked.
  • the housing cover and its counterpart offer several locking positions.
  • An adjustable cover can be used to adjust the pump. Unnecessary forces are avoided. The life of the pump can be increased.
  • Valves that are particularly reliable because of their simplicity are ball seat valves that can lock the pressure levels of the various stages before, in, and after the pump. At least in one of the openings such as suction or discharge opening, a ball seat valve may be present as a check valve.
  • the non-return valves can realize hydraulic steps via the bellows pump or separate them from each other.
  • a first check valve is provided in the inlet channel.
  • a second check valve is advantageously arranged.
  • the check valves z. B. alternately in an open state, so stay in a through-connected state. At least one of the check valves can also be designed as a plate check valve.
  • a non-return valve is at the position of the first check valve a suitable check valve, because the plate check valve has a small dead volume.
  • a poppet check valve may be configured to self-align in a fluid.
  • the length of the plate check valve can also be enclosed by a filter basket.
  • the plate check valve may be at least partially enclosed by the filter basket.
  • the non-return valve derives its name from a plate that can be used as a valve seat.
  • non-return valves usually have a pin.
  • a spring may be provided.
  • a non-return valve includes a spring, a pin and the plate. The pin can be freely suspended in the base body. The pen is only held from one side.
  • the plate check valve has a free end. At its free end, a bearing surface may additionally be formed on the pin.
  • the support surface is designed for the spring. The spring is supported on the support surface.
  • the plate check valve is self-aligning when it is held on one side.
  • the non-return valve can be viewed from different sides.
  • One side is the side facing the plate.
  • the spring is firmly connected to the plate facing side with a base plate.
  • the base plate is part of the body.
  • the base plate closes the body.
  • the base plate is the part that designed the basic body stepped.
  • the Base plate is firmly connected to the base body.
  • the flow behavior in the bellows pump can be improved by surface designs of the walls, which are wetted by the fluid.
  • the first check valve may have a funnel extension in the radial direction. On one side of the main body of the main body may have the funnel extension. The funnel extension may extend to the inlet channel.
  • the main body of the bellows pump may be at least partially hollow.
  • the plate check valve and the filter basket can be arranged in the cavity in the base body.
  • the cavity can serve as a reservoir.
  • the cavity may in one embodiment have a multiple of the volume of the vestibule. Reloading the fuel or the fluid from the reservoir into the vestibule is ensured so quickly.
  • the reservoir for reloading the working space is held by a cavity formation.
  • the volume of the reservoir may have at least 10 times the stroke volume of the bellows pump.
  • the stroke volume can amount to one fifth of the volume of the reservoir.
  • Another ratio which has an influence on the working behavior of the bellows pump is the ratio of the total stroke volume of the bellows pump to the volume attributable to or attributable to the antechamber.
  • the maximum volume that can be assigned to the prechamber should correspond in a particularly advantageous embodiment, less than one-tenth of the pumped by the bellows pump per stroke stroke volume. If the total stroke volume compared with the volume of the pre-chamber, it is advantageous if the stroke volume is at least ten times as large as the pre-chamber volume.
  • the filter basket can, for. B. (transverse to the main flow direction of the fluid from the reservoir to the opening cross-section of the check valve) at least triple the area compared to the narrowest point of a flow cross-section in the first check valve.
  • This cross section comparison leaves by comparison z. B. then measure when the plate check valve is in passage position.
  • An even greater longevity can be achieved in that the area of the filter is more than ten times the area of the fluid passage through the first check valve.
  • the maintenance intervals can be reduced by means of a large-area, multi-sided filter basket. In particular, gasoline for parking heaters is considered highly polluted.
  • the filter basket otherwise freely present in the reservoir can rest on one side of the main body and thus be supported by the main body.
  • the pump of the invention has a bellows, which may be a bellows in an advantageous embodiment of stainless steel.
  • the bellows takes over the function of the separating membrane and a spring element for returning the plate.
  • the plate which can also be referred to as a pump plate, is attracted to the electrical coil in or on the lid after applying a current and thereby increases the volume enclosed between the connection plate, bellows and pump plate such that a medium via the located in the connection plate control valve (for example, as a ball check valve or as a plate check valve) is sucked.
  • the bellows is stretched elastically in the length. When the coil is de-energized, the bellows retracts to its original length and the aspirated medium is expelled through the second counter-acting control valve or conveyed to a corresponding downstream pressure circuit.
  • the stroke of the pump can be set and limited via the adjustable housing cover (adjustments to the delivery volume and tolerance compensation can be made).
  • the pump described above can be used to pressures from 1 bar to 2 bar in any volumes depending only on the diameter of the bellows and the diameter of the plate.
  • plate and anchor are designed in two parts.
  • the anchor may be mechanically connected to the plate, for. B. screwed. Due to the bipartite nature of the moving plate-and-armature component, different materials are available for the plate and anchor.
  • the armature is made of a magnetizable metal.
  • the plate can be made of stainless steel.
  • the plate and the bellows can be made of similar materials.
  • the armature is supported by a spring against an adjusting screw.
  • the anchor can be preloaded with the aid of the adjustment screw. The biasing force can be adjusted so that no stopper elements are required.
  • a part of the armature may be housed in a guide sleeve to avoid tilting.
  • the guide sleeve allows the anchor and the plate connected to the anchor only movements in one dimension. Through the guide sleeve only upsetting and stretching of the bellows is possible.
  • a bellows pump In a bellows pump according to the invention, various forces occur.
  • the bellows causes a restoring force, which counteracts its expansion beyond the zero position.
  • the restoring force pulls the bellows back to the zero position.
  • the restoring force of the bellows can be increased by the spring, which supports the armature with respect to the adjusting screw.
  • the spring When the bellows is stretched, the spring is compressed.
  • the spring causes an expansion of the bellows a force that returns the bellows in the zero position.
  • at least temporarily affects the magnetic driving force of the coil Furthermore, other forces can occur, which are caused for example by pressure differences in the pump or by friction.
  • the balance of forces with the various pumping positions can be adjusted so that the respective force, which counteracts a movement of the plate in a direction of movement toward the end of the movement clearance, becomes greater in the region of the end of the movement clearance than the force responsible for the movement, so that an end stop position is unreachable.
  • additional damping elements for.
  • As rubbery surfaces are arranged on the broad sides of the plate, so that the plate at the end of their space for movement damped against a stop element, for. B. against a coil for the plate anchor strikes.
  • Combinations of force settings and additional damping elements are also possible.
  • the plate can be equipped with individual damping elements on their surfaces.
  • As a damping element z. B. also a mechanically stable solder are used, with which the connection between the bellows and plate has been made cohesively. Reducing the speed of travel of the disk at the end of the travel clearance provides a quieter pump that converts less energy to electroacoustics. A delayed stop at the end of the movement clearance promotes the life of the pump.
  • FIG. 1 shows a pump 100, which is equipped with two openings 102, 104 and an electrical contact 164, which represent the interfaces to the outside.
  • the pump 100 draws the medium to be conveyed via the first opening 102 through the channel 106, in which a first check valve 114 is seated.
  • the medium passes through the channel 106 to the first mouth 110.
  • the conveyed medium passes through the second mouth 112 through the channel 108 to the second opening 104.
  • In the channel 108 sits a second check valve 116.
  • the check valves 114, 116 are equipped as ball seat valves with a ball 118 and a spring 120, wherein via the force of the spring 120, the setting of the pressure for the opening of the check valve 114, 116 is set.
  • the bellows 122 Inside the pump 100 is the bellows 122, which has a first end 124 and a second end 126. At the first end 124, the plate 128 of the pump 100 is connected. There is no gap between the plate 128 and the bellows 122.
  • the bellows 122 is so dense against both gases and liquids that it is possible to safely convey even hydrogen.
  • An enclosed by plate 128 and bellows 122 interior 142 is gas and liquid-tight by plate 128 and bellows 122 limited.
  • the plate 128 merges into the armature 130. On both sides of the largest extension of the plate 128 damping elements 132, 134, 136, 138 are arranged.
  • the pumping volume 140 extends between the plate 128 and the connection plate 166 with the orifices 110, 112.
  • the pumping volume 140 is closed by the damping elements 132, 134 laterally, ie in the direction of the wall of the bellows 122.
  • the pumping volume 140 thus represents only a part of the interior 142 in the illustrated position of the plate 128.
  • Inside the housing 156 of the pump 100 a coil 144 is arranged inside the housing 156 of the pump 100.
  • the coil 144 is composed of several sub-coils 146, 148.
  • the coil 144 is formed by a bobbin 150 and associated windings, such as winding 152.
  • the housing 156 is constructed in several parts.
  • the housing 156 includes the housing bottom 154 and the housing cover 158.
  • the bellows 122 merges at its second end 126 with a material fit into the housing bottom 154.
  • the coil 144 is attached to the housing cover 158.
  • the housing cover 158 has a plurality of latching positions 160, which are offered by the latching area 162.
  • the electrical contact 164 looks out.
  • the connection plate 166 of the pump 100 is another area of the housing 156 .
  • the inflowing medium 168 passes through the first opening 102, which is an intake, at a sufficient negative pressure between the plate 128 and the upper side of the connection plate 166 in the pumping volume 140, provided that the armature 130, the lifting movement 172 directed to the coil 144 and in the Coil 144 carried out executed.
  • the exact spacing between armature 130 and coil 144 can be adjusted via the different detent positions 160 in the latching region 162 of the housing cover 158 in relation to the housing bottom 154.
  • the housing cover 158 can be fixed in one position, so that the coil 144 is arranged with its bobbin 150 in a unique position and at a unique distance to the plate 128 and to the armature 130.
  • the bellows 122 encloses the connection plate 166, so that the pumping volume 140, even in the maximum retracted position of the armature 130, is not completely formed by the interior of the bellows 122.
  • the two extreme positions of the plate 128 are attenuated by the damping elements 132, 134, 136, 138 with respect to the bobbin 150 and with respect to the connection plate 166.
  • Mechanical stop noises in the pump 100 can thus be suppressed, even when working with a coil 144 which should have no "soft end” behavior.
  • coil 144 may be configured as a "soft-end" coil (as plate 128 approaches its end positions).
  • the pump 200 is shown.
  • the pump 200 is similar to the pump 100 constructed. Some design changes between the pump 100 and the pump 200 can be identified by the coil 244, which is a toroidal coil, and by the attachment of the bellows 222 at its ends 224, 226.
  • the pump 200 also has openings 202, 204.
  • the opening 202 is a suction port.
  • the opening 204 is an ejection opening.
  • the medium to be conveyed passes to the discharge port 204 via the mouth 212 and the channel 208. In the channel 208 sits the second check valve 216.
  • the check valve 216 is like the check valve 214 consists of a ball 218 and a spring associated therewith 220 in the Channel 208 are installed together.
  • the port 210 is adjacent to the orifice 212 on the same side of the port plate 266.
  • the outflowing medium 270 arrives at a pulling movement 274 of the bellows 222 from the plate 228, the Anchor 230 and thus is an anchor plate, ejected to the discharge port 204.
  • the pump 200 delivers the medium to be conveyed from the first opening 202 to the second opening 204. So that the pressure levels at all Side and within the pump 200 can be met, check valves 214, 216 are provided.
  • the bellows 222 with its two ends 224, 226 opens on one side to the plate 228 and is for this purpose with welds 237, 239 firmly attached to the plate 228.
  • the other end 226 of the bellows 222 is clamped between terminal plate 266 and housing bottom 254. Due to this mechanical restraint of the bellows 222, the bellows 222 may act as a return spring when overstretched and retract the plate 228 to the terminal plate 266 if the coil 244 were to establish too low an electromagnetic force by comparison.
  • the bobbin 250 of the coil 244 is configured annular, over which the windings 252 are laid.
  • the bobbin 250 provides a cavity for receiving a portion of the armature plate 228, which can thus enter the coil 244.
  • the exact interaction of the forces from the bellows 222 and the coil 244 can be adjusted by the choice of a detent position 260, which may be available in the latching region 262 of the housing cover 258.
  • the latching position 260 is presented in the latching area 262.
  • the latching region 262 is a covering region between the housing bottom 254 and the housing cover 258, which are parts of the housing 256.
  • the welds 237, 239 By placing the welds 237, 239 on the plate 228 following or in alignment with the bobbin 250, a reduction of the impact noise can be made. If the weld 237 is designed as a single layer, the area of the weld seam 237 that is thereby reduced reduces the contact surface between the weld seam 237 and the coil 244. A simple weld seam 237, 239, eg. B. only a laser welding width along, reduced as a stop surface noise. Further damping elements 232, 234 may be attached to other locations of the plate 228.
  • the interior 242 of the bellows 222 forms the pumping volume 240, depending on the position of the plate 228.
  • the energy for pumping the pump 200 is supplied to the coil 244 of the pump 200 via the electrical contact 264.
  • the pump 300 after FIG. 3 is similar to the pumps 100 and 200 of the FIGS. 1 and 2 Thus, many findings of the pumps 100 and 200 can be transferred to the pump 300.
  • the pump 300 also has openings 302, 304 over which the medium to be conveyed can be sucked in and expelled. For this reason, channels 306, 308 are guided in the pump 300, more specifically in the connection plate 366, which terminate in orifices 310, 312.
  • check valves 314, 316 are provided, which can be constructed by means of balls 318 and springs 320.
  • the bellows 322 with its two ends 324, 326 partially surrounds the connection plate 366 and represents the mediating component between the plate 328, more precisely the anchor plate 328, and the connection plate 366.
  • the interior 342 of the bellows 322 can be used as pumping volume 340.
  • the pumping volume 340 is less than the entire (theoretical) interior 342 of the bellows 322.
  • the end 324 of the bellows 322 opens into the anchor plate 328, the armature 330 thus merges into the bellows 322.
  • the armature 330 is moved via the coil 344, the is composed of the bobbin 350 and the winding 352, moves.
  • the coil 344 can exert an electromagnetic force on the armature 330, so that the bellows 322 is pulled along. In this case, the bellows 322 generates a restoring force. If the electromagnetic force of the coil 344 is no longer sufficient, the bellows 322 pulls the anchor plate 328 back into the starting position, in which the bellows 322 is slightly compressed, ie, for example by approximately 20% of its total length, due to the own weight of the anchor plate 328 can be.
  • the housing cover 358 can be set in different detent positions 360, which are offered in the detent region 362, that the housing cover 328 closer or further via a screw thread is fixed to the housing bottom 354.
  • the housing 356 has cavities inside it in which the bellows 322 can expand and contract just as well.
  • a bellows pump 400 comprising a housing 456 is shown.
  • the bellows pump 400 has a bellows 422.
  • a wall 423 of the bellows 422 has an equal wall thickness at all points.
  • the wall 423 of the bellows 422 has no kinks but only corrugations.
  • the bellows 422 is fixedly connected on one side to a movable plate 428a. On the opposite side of the plate 428a, the bellows 422 is fixedly connected to a base 425. Between the plate 428a and the bellows 422 is an interior 442.
  • the main body 425 is not attributable to the inner space 442.
  • a working space 443 is limited.
  • An inlet channel 407 and an outlet channel 409 are respectively connected to the working space 443.
  • a first check valve 414 is arranged, through which the inlet channel 407 can be closed.
  • a second check valve 416 is arranged, through which the outlet channel 409 can be closed.
  • the plate 428a has a plurality of steps like the step 499 and so protrudes between the spurs 486th
  • FIG. 4 Check valves as the check valve 414 to see.
  • a plate check valve 417 is provided with a plate 418, a pin 419 and a spring 420.
  • the non-return valve 417 is installed in the reverse manner.
  • the pin 419 is predominantly cantilever and extends more than 50% of its length in the reservoir 482. Component tolerances between plate check valve 417 and body 425, more precisely, the opening for receiving the Teller Wegschlagventils 417, can be largely ignored. Only immediately adjacent to the plate 418 of the pin 419 is guided by the main body 425.
  • the plate check valve 417 is in two switching states in the Figures 5 and 6 shown.
  • a bearing surface 476 is fixedly connected, on which the spring 420 is supported with its one end.
  • the other end of the spring 420 is supported against a base plate 425 fixedly connected to the base 427.
  • the base plate 427 includes a reservoir 482 formed in the body 425 which is part of the intake passage 407.
  • the plate 418 of the plate check valve 417 is pressed by the spring force of the spring 420 on the side of the working space 443 against the base plate 427.
  • the plate 418 closes the connection of the inlet channel 407 and working space 443 in the in FIGS. 4 . 5 and 6 shown embodiment.
  • a filter 478 is arranged in the reservoir 482.
  • a filter basket 480 is provided as filter 478.
  • the filter basket 480 is firmly connected to the base plate 427.
  • the volume enclosed by the filter basket 480 is a multiple of the stroke volume of the bellows pump 400, d. H. the volume change of the working space 443 during operation.
  • the filter 478 is a filter basket 480 made of a metal grid by pressing.
  • the base plate 427 may be pre-assembled as a unit with the plate check valve 417 and the basket filter 482. This unit can then be firmly connected to the base body 425, in particular by a pressing firmly connected.
  • the plate check valve 417 is freely suspended in the embodiment shown and is self-contained. Aligning is done by a hydraulic equilibrium, in particular along the pin 419. By a boundary edge 494 on the plate 418 a seal in the plate check valve 417 is made by a simple line contact.
  • the second check valve 416 disposed in the exhaust passage 409 is a ball-and-spring check valve, which is also referred to as the ball seat valve.
  • the movable plate 428 a is provided with a projection 484.
  • a movable plate 428a with projection 484 a deep-drawn molded sheet metal part can be used.
  • the protrusion 484 is axisymmetric to a longitudinal axis 475 of the bellows pump 400.
  • the protrusion 484 is positioned between extensions 486 of the body 425.
  • the Spout 486 of the base body 425 is formed together with the base plate 427 a recess 488.
  • the recess 488 is opposite to the projection 484 of the plate 428a. Through the recess 488 and the projection 484, the antechamber 441 is formed.
  • the prechamber 441 is permanently hydraulically connected to the working space 443 via a channel 498.
  • a metallic contact between the base body 425, in particular its extensions 486, and the projection 484 of the plate 428a is avoided.
  • the magnetic termination is made exclusively to the drive 431 through the plate 428a.
  • This plate 428a is fixedly connected to an armature 430 of an electromotive drive 431, not shown. By the drive 431, the bellows 422 is pulled apart. The movable plate 428a is removed from the base plate 427. This creates a negative pressure in the antechamber 441. This negative pressure in the prechamber 441 is greater than the negative pressure generated by this stroke within the working chamber 443 outside the prechamber 441. The negative pressure in the prechamber 441 opens the plate check valve 417 and liquid flows from the inlet channel 407 into the prechamber 441 and therewith (in FIG delaying manner) also in the working chamber 443. By the pre-chamber 441, a larger starting negative pressure is provided, as it would be possible alone with the working space 443. Since the volume trapped by the filter basket 480 is large compared to the volume flowing through the plate check valve 417, the flow resistance of the filter basket 480 may be neglected.
  • the plate check valve 417 closes as soon as the negative pressure in the prechamber 441 is smaller than the restoring force preset by the spring 420 of the plate check valve. In the pre-chamber 441 and in the working space 443, an overpressure is generated. Due to the overpressure, the second check valve 416 is opened. Liquid flows out of the working space 443 through the outlet channel 409.
  • the bellows pump 400 described above can be used to pump fuel such as diesel and gasoline. If the fuel is still cold and thus viscous or if there is still air in the pre-chamber 441 or the working space 443, then it is at commissioning requires an increased pressure differential between a location on either side of and beyond the first check valve 414 to allow fuel to flow into the prechamber. By Vorsch 441 this required increased starting pressure is provided.
  • the inflow of liquid from the inlet channel 407 can still be supported when the plate check valve 417 is open. Due to the special configuration of the base plate 427 with a funnel extension 490, a nozzle effect is generated in the region of the first check valve 414. This funnel extension 490 is particularly useful in the Figures 5 and 6 clearly visible. Furthermore, the base plate 427 is provided with a rounding 496, which reinforces the nozzle effect again.
  • the plate 418 of the valve check valve 417 is attached to the pin 419, and indeed the plate 418 is at a right angle on the pin 419.
  • the plate 418 can be pulled into position in the funnel extension 490 by means of spring 420.
  • the spring 420 is supported on the support surface 476, which is located inside, more precisely approximately in the middle, of the filter basket 480.
  • the base plate 427 has the funnel extension 490.
  • An opposing funnel constriction with curves 496 concludes the base plate 427 on the opposite, not provided for the plate 418 side.
  • the boundary edge 494 of the plate 418 lies with a circumferential line contact on the funnel extension 490 in the base plate 427.
  • the spring force of the spring 420 is adapted to a negative pressure on the plate 418 can accomplish a lifting of the plate 418 of the funnel extension.
  • the plate 518 of the Teller Wegtschventils 517 is formed as a truncated cone 592.
  • This truncated cone 592 is in the closed state of the Tellerschreibtschventils 517 at a boundary edge 594 of a longitudinal bore, through which the pin 519 protrudes into the reservoir 582.
  • a Nozzle effect generated When opening the plate check valve 517 is on the conical surfaces of the truncated cone 592 a Nozzle effect generated. It forms locally on the valve, on the non-return valve 517, a negative pressure. This nozzle effect can be reinforced by the formation of the rounding 596.
  • the base plate 527 provides an opening that is funnel-shaped initially viewed from one side to recrude toward the other side in an expanding manner to provide hydraulic guidance for the fluid.
  • a filter basket 580 is arranged around the plate check valve 517 on the input side, through which the fluid must first pass.
  • the filter basket 580 is made of a perforated plate, so a fine-meshed perforated plate.
  • the filter basket 580 is self-supporting.
  • the filter basket 580 extends at a distance from the support surface 576 for the pin 519.
  • the support surface 576 is located inside the filter basket 580.
  • a plate check valve 517 is used, the pin 519 has a diameter of less than 3.0 mm, in particular between 1.5 mm and 2.0 mm.
  • the spring 520 has a spring force of 0.1 to 0.2 Newtons.
  • the opening cross-section through the base plate 527 should not be more than 1.0 mm larger than the diameter of the pin 519, e.g. B. less than 4.0 mm with a pin diameter of 3.0 mm.
  • a pump pressure of 0.2 bar can be established and the bellows pump 400 can reliably record the operation of the auxiliary heater.
  • a fluid in the range of about 1 to 5 l / min can be pumped via the working chamber 443.
  • the stylus such as stylus 419 or stylus 519, only opens in a fraction of a millimeter.
  • the opening of the disk check valve 417 or 517 is effected by the negative pressure in the prechamber 441.
  • the additional negative pressure in the prechamber 441 increases the pressure difference per pump stroke of the bellows 422.
  • FIG. 9 shows a further embodiment of a pump 600 with a metallic Bellows 622.
  • the bellows 622 opens into a movable plate 628a.
  • the bellows 622 opens into a main body 625.
  • the main body 625 is firmly connected to a housing 656. In the housing 656 all components of the pump 600 are housed.
  • the base body 625 extends into an area in the interior of the bellows 622.
  • the volume of the base body 625 is not attributable to an interior space 642 because the volume of the base body 625 remains constant during a movement of the bellows 622.
  • the main body 625, the plate 628 a and the bellows 622 are delimiting components of the interior 642 of the pump 600.
  • the interior 642 can be divided into a working space 643 and an antechamber 641.
  • the main body 625 is hollow inside.
  • a reservoir 682 for a fluid, such as fuel, is provided in the cavity.
  • the reservoir 682 is closed by a base plate 627.
  • the base plate 627 is fixedly connected to the main body 625.
  • the working space 643 is connected to the inlet passage 607 via a plate check valve 617 as the first check valve 614.
  • a plate check valve 617 is an embodiment according to the Figures 5 and 6 used.
  • the plate check valve 617 can be unlocked by a negative pressure in the prechamber 641. When the bellows 622 is pulled apart, a negative pressure is created in the prechamber 641. The negative pressure acts against a restoring force F6 of a spring of the disk check valve 617. As soon as the force caused by the pressure difference between the reservoir 682 and the pre-chamber 641 is greater than the restoring force F6 of the Teller Weg Kunststoffchtventils 617, opens the Teller Weg Kunststoffventil 617. The fluid flows from the reservoir 682 into the prechamber 641. From the prechamber 641, the fluid enters the working space 643.
  • the plate check valve 617 closes as soon as the negative pressure in the prechamber 641 is smaller than the restoring force F6 preset by the spring 620 of the plate check valve 617.
  • the Anchor 630 is moved further in the direction of the base plate 627, an overpressure is generated in the prechamber 641 and in the working space 643.
  • the overpressure opens a second check valve 616. Liquid flows out of the working space 643 through an outlet channel 609.
  • the plate 628a is driven by an armature 630 by means of an electromagnet.
  • a coil 644 is part of the electromagnet.
  • the coil 644 is carried by a bobbin 650.
  • the bobbin 650 is designed annular. Windings 652 of the coil 644 extend around the bobbin 650. In the bobbin 650, the armature 630 and other elements that z. B. described below, be housed.
  • the plate 628a and the armature 630 are joined together, but as separate components, so they are designed in two parts.
  • the two-piece design of armature 630 and plate 628a has the advantage that armature 630 and plate 628a are separable for maintenance purposes and deposits can be removed from the pump.
  • the plate 628a is made of stainless steel.
  • the armature 630 is made of a magnetic material.
  • the plate 628a is bolted to the armature 630.
  • the armature 630 lies in a guide sleeve 635, which allows the armature 630 only movements in one dimension.
  • the armature 630 can only move in the axial direction along a central axis 675 a of the bellows 622.
  • the guide sleeve 635 can be avoided that the armature 630 tilted.
  • the guide sleeve 635 has a sliding bearing on its inside for a portion of the cylinder jacket of the armature 630.
  • the guide sleeve 635 is finely ground to reduce frictional forces between the armature 630 and the guide sleeve 635.
  • the guide sleeve 635 ensures a good synchronization of the armature 630.
  • the armature 630 is mounted on a side facing away from the base plate 627 on a spring 633.
  • the spring 633 is clamped from two sides. On one side of the spring 633 is the armature 630. On another side of the spring 633 is an adjusting screw 629 at.
  • the armature 630 can be biased. In particular, with the adjusting screw 629 changes in the balance of power can be compensated, the Over time, residual magnetization of the armature 630 due to magnetic hysteresis effects.
  • the adjustment screw 629 is rotated into a thread attached to the housing 656 in the axis 675a of the pump 600, the spring 633 is compressed by the adjustment screw 629.
  • a force F3 exerted by the spring 633 on the armature 630 toward the base plate 627 is increased.
  • the armature 630 is accelerated toward the base plate 627.
  • a movement on the base plate 627 corresponds to a movement in the negative direction.
  • the spring 633 thus exerts a negative force F3 on the armature 630.
  • the bellows 622 is stretchable and also compressible.
  • the bellows 622 exerts by stretching or compression another force F2 on the plate 628a and thus on the armature 630. When the bellows 622 is stretched, the force F2 acts in the negative direction, i. h to the base plate 627.
  • the force F2 exerted by the bellows 622 and the spring force F3 balance out in a position of the plate 628a and the armature 630, respectively.
  • Plate 628a or armature 630 may occupy different relative positions to the remaining components of pump 600, plate 628a and armature 630 are movable parts in pump 600.
  • the position of plate 628a is variable.
  • the position at which no force F2, F3 acts on the plate 628a when the coil 644 is not energized is the zero position of the pump 600.
  • the zero position defines the origin O of a coordinate system (see also FIG FIG. 10 ).
  • the position of the zero position depends on the structural design of the bellows 622 and the spring 633. Therefore, in FIG.
  • FIG. 10 shows by way of example the in a pump 600 after FIG. 9 acting forces.
  • the force F acting on the Y axis Y is plotted over the pump stroke on the X axis X.
  • a box in the Y direction corresponds to a force of 10 Newton.
  • a box in the X direction corresponds to a pump stroke of 0.1 mm.
  • a box in the Y direction corresponds to a force of 20 Newton.
  • An origin O is at the point where the force F2 of the bellows 622 and the force F3 of the spring 633 equalize.
  • the origin O is thus in the zero position of the pump 600.
  • the plate 628a has a rest position in the zero position.
  • the plate is in a balance of power.
  • the zero position can be regarded as the first equilibrium position I.
  • the zero position may, for example, be at the point where the base body 625 and the plate 628a touch. In this case, only expansion of the bellows 622 is possible.
  • the body 625 prevents compression.
  • An extension of the bellows 622 is shown as extending in the positive direction.
  • the X-values X of the pump stroke increase with increasing distance of the plate 628a from the main body 625. Accordingly, the forces in the positive direction which accelerate the plate 628a away from the main body 625 are plotted on the Y-axis Y. Those forces which accelerate the plate towards the main body 625 are applied in the negative direction on the Y-axis Y.
  • the spring 633 Upon deflection of the plate 628a from the zero position in the positive direction, the spring 633 is compressed.
  • the spring force F3 counteracts this. Accordingly, the spring force F3 acts in the negative direction.
  • the bellows 622 is stretched when deflected in the positive direction as set forth above. The bellows 622 counteracts expansion.
  • the force F2 of the bellows 622 thus acts in the negative direction.
  • the electromagnet also referred to as a magnet
  • the coil 644 exerts a force F1 in the positive direction on the plate 628a, which may be referred to as magnetic force due to its generation.
  • the plate 628a is accelerated toward the spool 644.
  • the magnetic force F1 approaches infinity as the distance of the armature 630 from the electromagnet approaches zero.
  • the magnetic force F1 increases only slowly.
  • the average slope is less than 10 N / mm.
  • the negative slope of the spring force F3 is less than - 30 N / mm.
  • the characteristic curve of the magnetic force F1 can be configured in sections with different slopes.
  • the characteristic of the magnetic force F1 can be designed, for example, so that the magnetic force F1 on a stretch from the zero position of the armature to a deflection of the armature, which corresponds to about 10% of the maximum possible pump stroke, for example, 0.1 mm, compared to increases in all other sections of the regular pump stroke steepest, for example, with a slope of 60 N / mm.
  • the coil 644 acts on the armature 630 only a small magnetic force F1, for example, 5 N, when the armature is in the zero position.
  • the force F4 resulting from the spring force F3, the bellows force F2 and the magnetic force F1 is shown as a solid line in FIG FIG. 10 located. Because the restoring force F3 of the spring 633 and the restoring force F2 of the bellows 622 together increase more than the force F1 of the magnet, the resultant force F4 returns as the pump stroke increases. After a pump stroke of approx. 0.7 mm, a further equilibrium of forces is achieved. Thus, there is a second equilibrium position II of the plate 628a. The resultant force F4 on the plate 628a is 0 Newtons. With stronger deflection of the plate 628a beyond the equilibrium position II outweighing the restoring forces F2, F3 and the plate 628a is braked.
  • Frictional forces that additionally brake the plate 628a are not shown in the force diagram. With an even stronger deflection of the plate 628a, which corresponds for example to a pump stroke of more than 0.9 mm, the attractive force F1 of the magnet outweighs again because of the Distance of the armature 630 to the magnet is small. It is advantageous if the magnet is energized clocked in a manner that no current flows through the coil 644 when the plate 628a reaches the equilibrium position II.
  • the coil 644 can be supplied, for example, with an AC voltage, a square-wave voltage or a sawtooth voltage. The plate 628a is retracted to the zero position by the restoring forces F2, F3 and a new pumping cycle begins.
  • FIG. 11 another embodiment of a bellows pump 700 is shown.
  • the bellows pump 700 after FIG. 11 resembles the bellows pump 600 after FIG. 9 with a few differences, inter alia, that a first check valve 714 is embodied inside a main body 725 as a ball seat check valve 714.
  • the mass which the check valve 714 may have at most depends on a maximum achievable negative pressure through an antechamber 741. Small masses of the locking member of the check valve 714 require to open a lower negative pressure than large masses.
  • the ball seat check valve 714 has by its opposite a Teller Wegtschventil 617 (after FIG. 9 ) Lower mass the advantage that lower negative pressures are required to open it, as in the Teller Weg Kunststoffchtventil 617.
  • the pump 700 can be divided into a hydraulic part 701 and a drive part 731 a.
  • a central element of the hydraulic part 701 of the pump 700 is, as in FIG. 9 , a bellows 722 made of stainless steel, which is fixedly connected to a movable plate 728 a and in which the main body 725 extends.
  • the driving part 731a comprises an armature 730 driven by a spool 744, a guide sleeve 735 for the armature 730, a spring 733, an adjusting screw 729 and the spool 744 together with the bobbin 750.
  • the sleeve may also be referred to as starter sleeve 721.
  • the starter sleeve 721 has a cylindrical shape.
  • the starter sleeve 721 has at its end portions 724a, 726a in the longitudinal direction about twice as large a width as in its center.
  • the end portions 724a, 726a extend from the both ends of the starter sleeve 721 to about 10% of the length of the starter sleeve 721.
  • the starter sleeve 721 tapers towards the middle.
  • the end portions 724a, 726a are coronal.
  • the end portions 724a, 726a represent the more stabilizing, thicker portions of the sleeve that provide for inherent stability of the initiator sleeve 721.
  • the starter sleeve 721 extends beyond its end portions parallel to a stroke direction of the bellows 722.
  • An object of the starter sleeve 721 is to support the bellows 722 and to compensate for manufacturing tolerances and length changes of the bellows 722 that occur due to aging phenomena. It is sufficient to exactly cut off the bellows 722 in the mm range during production.
  • the cylinder wall of the starter sleeve 721 grips the main body 725 at least in sections.
  • the starter sleeve 721 extends around the main body 725 around.
  • the starter sleeve 721 extends over a certain length along the main body 725.
  • the starter sleeve 721 divides a working chamber 743 of the pump 700.
  • the starter sleeve 721 provides the throttle portion 743a between an inner wall 723c of the starter sleeve 721 and an outer wall 723b of the main body 725.
  • the throttle portion 743a is in hydraulic communication with the remaining volume of the working space 743 at at least one location.
  • the throttling region 743a is in hydraulic communication with the antechamber 741, depending on the position of the plate 728a.
  • the throttle region 743a is connected to an exhaust passage 709 via a second check valve 716. Only the part of a fluid to be conveyed, such as a fuel that is located in the throttle region 743a, is conveyed out of the pump 700 in a pumping cycle. Between the starter sleeve 721 and an inner wall 723a of the bellows 722 remains a residual portion of the fluid. Because the remainder of the fluid does not have to be drawn from a tank during a startup operation of the pump 700, it is made easier to start the pump 700. The remainder of the fluid is exposed to lower pressure and temperature variations than the portion of the fluid that is in the throttle region 743a. If, for example, gasoline, which already assumes a gaseous state at about 60 ° C.
  • the proportion of the liquid which remains between the inner wall 723 a of the bellows 722 and the starter sleeve 721 can form gas in the working space 743 delay or restrict to a portion of the work space 743.
  • the starter sleeve 721 is advantageously like the Bellow 722 made of stainless steel.
  • the starter sleeve 721 can be manufactured as part of the main body 725.
  • the functionality of the pump especially in its start-up phase, d. H.
  • a starter sleeve which can also be called a fill tube, improves.
  • the starter sleeve forms a throttle gap or two separation spaces in the working space.
  • a reduction in mass of the one closing body of the first check valve ensures reliable opening, even in partially filled working space.
  • Ground, in particular finely ground bearing sleeves for the anchor, d. H. Bushings with a smoothed surface improve the pumping properties during the starting phase.
  • a frictional resistance due to the movement of the armature, does not oppose the movement of the pump.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
EP12191587.0A 2011-11-07 2012-11-07 Pompe à soufflet à plis Withdrawn EP2589807A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202011051879U DE202011051879U1 (de) 2011-11-07 2011-11-07 Faltenbalgpumpe
DE202012100944U DE202012100944U1 (de) 2012-03-16 2012-03-16 Balgpumpe

Publications (1)

Publication Number Publication Date
EP2589807A1 true EP2589807A1 (fr) 2013-05-08

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EP12191587.0A Withdrawn EP2589807A1 (fr) 2011-11-07 2012-11-07 Pompe à soufflet à plis

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EP (1) EP2589807A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107638611A (zh) * 2017-10-31 2018-01-30 湖南中医药大学 一种新型非接触式电动输液装置
US10677239B2 (en) 2017-09-21 2020-06-09 Dayco Ip Holdings, Llc Solenoid activated vacuum pump for an engine system and system having same

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB328306A (en) * 1928-11-12 1930-04-14 Aage Eiler Winckler Improvements in and relating to fuel pumps for internal combustion engines
US2488723A (en) * 1947-11-10 1949-11-22 Autopulse Corp Electromagnetic motor
DE867627C (de) 1950-04-05 1953-07-23 Mono Cam Ltd Brennstoff-Einspritzpumpe
DE1866945U (de) 1957-08-20 1963-02-07 Kenrokoro Urata Kolben- bzw. membranpumpe.
DE2234311B2 (de) 1971-07-30 1976-08-05 Walbro Corp Einstueckiger, homogener, fuer pumpen bestimmter faltenbalg
DE2143282B2 (de) 1971-08-30 1980-04-03 Draegerwerk Ag, 2400 Luebeck Gasspür- bzw. Staubspür- und -meßgerät
DE3333977A1 (de) 1982-09-20 1984-03-22 Infusaid Corp., Norwood, Mass. Infusionspumpe
DE3343708A1 (de) 1982-12-08 1984-06-14 Moog Inc., 14052 East Aurora, N.Y. Verfahren und vorrichtung zum ausgeben eines infusionsmittels an einen koerper eines saeugers
DE4032555A1 (de) 1990-10-13 1992-04-16 Teves Gmbh Alfred Elektromagnetisch betaetigte hydraulische pumpe
DE3390255C2 (en) 1982-11-04 1992-06-25 Univ Johns Hopkins Implanted medication infusion appts. with pulsatile pump
DE9190053U1 (fr) 1990-04-25 1993-04-01 Infusaid, Inc., Norwood, Mass., Us
US5308230A (en) * 1993-03-08 1994-05-03 Stainless Steel Products, Inc. Bellows pump
DE19548074A1 (de) 1994-12-26 1996-07-25 Aisin Seiki Balgpumpe
DE19522943A1 (de) 1995-06-23 1997-01-02 Dagma Gmbh & Co Elektromagnetische Dosiervorrichtung mit außenliegendem Anker
EP0994255A1 (fr) * 1998-10-14 2000-04-19 Mitsubishi Denki Kabushiki Kaisha Système de pompage de carburant à haute pression
EP1166912A2 (fr) * 2000-06-16 2002-01-02 Nhk Spring Co., Ltd. Dispositif et méthode de fabrication de soufflets métalliques
DE102004011123A1 (de) 2003-09-02 2005-03-31 Hydraulik-Ring Gmbh Pumpe zur Förderung eines Abgasnachbehandlungsmediums, insbesondere einer Harnstoff-Wasser-Lösung, für Dieselmotoren
DE102006044254B3 (de) 2006-09-16 2008-03-27 Thomas Magnete Gmbh Membranpumpe

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB328306A (en) * 1928-11-12 1930-04-14 Aage Eiler Winckler Improvements in and relating to fuel pumps for internal combustion engines
US2488723A (en) * 1947-11-10 1949-11-22 Autopulse Corp Electromagnetic motor
DE867627C (de) 1950-04-05 1953-07-23 Mono Cam Ltd Brennstoff-Einspritzpumpe
DE1866945U (de) 1957-08-20 1963-02-07 Kenrokoro Urata Kolben- bzw. membranpumpe.
DE2234311B2 (de) 1971-07-30 1976-08-05 Walbro Corp Einstueckiger, homogener, fuer pumpen bestimmter faltenbalg
DE2143282B2 (de) 1971-08-30 1980-04-03 Draegerwerk Ag, 2400 Luebeck Gasspür- bzw. Staubspür- und -meßgerät
DE3333977A1 (de) 1982-09-20 1984-03-22 Infusaid Corp., Norwood, Mass. Infusionspumpe
DE3390255C2 (en) 1982-11-04 1992-06-25 Univ Johns Hopkins Implanted medication infusion appts. with pulsatile pump
DE3343708A1 (de) 1982-12-08 1984-06-14 Moog Inc., 14052 East Aurora, N.Y. Verfahren und vorrichtung zum ausgeben eines infusionsmittels an einen koerper eines saeugers
DE9190053U1 (fr) 1990-04-25 1993-04-01 Infusaid, Inc., Norwood, Mass., Us
DE4032555A1 (de) 1990-10-13 1992-04-16 Teves Gmbh Alfred Elektromagnetisch betaetigte hydraulische pumpe
US5308230A (en) * 1993-03-08 1994-05-03 Stainless Steel Products, Inc. Bellows pump
DE19548074A1 (de) 1994-12-26 1996-07-25 Aisin Seiki Balgpumpe
DE19522943A1 (de) 1995-06-23 1997-01-02 Dagma Gmbh & Co Elektromagnetische Dosiervorrichtung mit außenliegendem Anker
EP0994255A1 (fr) * 1998-10-14 2000-04-19 Mitsubishi Denki Kabushiki Kaisha Système de pompage de carburant à haute pression
EP1166912A2 (fr) * 2000-06-16 2002-01-02 Nhk Spring Co., Ltd. Dispositif et méthode de fabrication de soufflets métalliques
DE102004011123A1 (de) 2003-09-02 2005-03-31 Hydraulik-Ring Gmbh Pumpe zur Förderung eines Abgasnachbehandlungsmediums, insbesondere einer Harnstoff-Wasser-Lösung, für Dieselmotoren
DE102006044254B3 (de) 2006-09-16 2008-03-27 Thomas Magnete Gmbh Membranpumpe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10677239B2 (en) 2017-09-21 2020-06-09 Dayco Ip Holdings, Llc Solenoid activated vacuum pump for an engine system and system having same
CN107638611A (zh) * 2017-10-31 2018-01-30 湖南中医药大学 一种新型非接触式电动输液装置

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