EP4329945A1 - Piezo-aktorvorrichtung - Google Patents
Piezo-aktorvorrichtungInfo
- Publication number
- EP4329945A1 EP4329945A1 EP22724026.4A EP22724026A EP4329945A1 EP 4329945 A1 EP4329945 A1 EP 4329945A1 EP 22724026 A EP22724026 A EP 22724026A EP 4329945 A1 EP4329945 A1 EP 4329945A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piezo actuator
- actuator device
- valve body
- piezo
- valve
- 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
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
- B05C5/0275—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve
- B05C5/0279—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve independently, e.g. individually, flow controlled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
- B05C5/0229—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet the valve being a gate valve or a sliding valve
- B05C5/0233—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet the valve being a gate valve or a sliding valve rotating valve, e.g. rotating perforated cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
- F16K31/007—Piezoelectric stacks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
- F16K31/007—Piezoelectric stacks
- F16K31/008—Piezoelectric stacks for sliding valves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
- H02N2/043—Mechanical transmission means, e.g. for stroke amplification
- H02N2/046—Mechanical transmission means, e.g. for stroke amplification for conversion into rotary motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K2099/0073—Fabrication methods specifically adapted for microvalves
- F16K2099/0074—Fabrication methods specifically adapted for microvalves using photolithography, e.g. etching
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K2099/0073—Fabrication methods specifically adapted for microvalves
- F16K2099/008—Multi-layer fabrications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
- H02N2/043—Mechanical transmission means, e.g. for stroke amplification
Definitions
- the invention relates in particular to a piezo actuator device, preferably for controlling an output of an application agent onto a component (e.g. a motor vehicle body component), e.g. B. for dispensing a sealant.
- the piezo actuator device is preferably used to dispense an application agent onto the component, e.g. B. to seal an overlap (e.g. sheet metal overlap) and/or to protect an edge (particularly sheet metal edge).
- the piezo actuator device can also be designed to apply the application agent over a large area to a component surface in order to protect the component surface. It is also possible e.g. B. an issue of application means in the form of an adhesive to glue components together.
- WO 2019/154570 A1 discloses a metering valve with a closing body and a valve seat, the closing body between a closed position, in which it sits on the valve seat and closes a material outlet, and an open position, in which it is lifted off the valve seat and releases the material outlet, is movable back and forth, with an actuating element fixedly connected to the closing body and with two piezo actuators between which the actuating element is arranged, wherein the actuating element is arranged at a smaller distance from a first of the piezo actuators in the closed position than the maximum change in length of the first piezo actuator, or rests loosely on the first piezo actuator and is arranged at a distance from the second of the piezo actuators that is greater than the maximum change in length of the first piezo actuator, and the actuating element in the Open position is arranged at a distance from the second piezo actuator which is less than the maximum change in length of the second piezo actuator, or rests loosely on the second pie
- the closing body experiences an initial acceleration when it is actuated.
- An electromagnet then takes over the movement of the closing body over the entire stroke.
- the electromagnet also keeps the closing body in the desired end position.
- a spring-loaded mechanism also holds the closing body in closed when de-energized.
- the metering valve is relatively complex, e.g. B. because three functional units are required to open and close, which must also be very precisely coordinated. A high susceptibility to faults can therefore not be ruled out.
- it is z. For example, it is not possible to freely select a stroke of the closing body as a further application variable, because this is always set to a specific value due to the design.
- An object of the invention is to provide an improved and/or alternative piezo actuator device.
- the invention relates to a piezo actuator device, preferably for controlling an output of an application agent on a component, for. B. a motor vehicle body part.
- the application agent can, for. B. be a viscous, especially highly viscous application agent.
- the application agent can, for. B. a sealant, a polyvinyl chloride (PVC, in particular a PVC plastisol), a thick material, a paint, an adhesive, a preservative (z. B. wax) and / or an insulating material.
- PVC polyvinyl chloride
- the piezo actuator device can preferably be used to dispense an application agent onto the component.
- the piezo actuator device can preferably be used to dispense an application agent onto the component, e.g. B. to seal an overlap (e.g. sheet metal overlap) and/or to protect an edge (particularly sheet metal edge).
- the piezo actuator device can alternatively or additionally z. B. be designed to apply the application agent areally on a component surface to protect the component surface. It is also possible e.g. B. an issue of application means in the form of an adhesive to glue components together.
- the piezo actuator device can optionally z. B. at least one functional unit and / or optionally at least two, at least three, at least four or at least five or at least six functional units. It is possible that the piezo actuator device includes the following or preferably the functional unit z. B. includes the following and/or preferably the at least two functional units each include in particular the following: at least one (preferably axially movable back and forth) valve body (e.g. valve needle) for opening and closing at least one valve seat, at least one preferably pivotable and/or designed as an actuating lever actuating arm for actuating the at least one valve body, and a piezo actuator, z. B. a single piezo actuator, which is designed to move (preferably by means of the at least one actuating arm) the at least one valve body to (preferably completely) close and/or to (preferably completely) open the at least one valve seat.
- at least one preferably axially movable back and forth
- valve body e.g. valve needle
- the piezo actuator device z. B. comprises at least two or at least three valve bodies that are moved together by one, in particular a single, piezo actuator (z. B. indirectly via one or more actuating arms).
- a piezo actuator can thus z.
- B. operate a single valve body or multiple valve bodies.
- the piezo actuator can advantageously assume the function of preferably completely opening and optionally the function of completely closing at least one valve seat.
- z. B possible to implement a pulsating application with the piezo actuator device to interrupt the application and / or to implement an operation in which, depending on the hub, a certain amount of an application agent is applied continuously.
- Such a variation can advantageously also z. B. within a implement a single application path, especially as this preferably only the control of the piezo actuator must be adjusted.
- the piezo actuator can, for. B. be designed to move the at least one valve body to a fully closed valve seat position, and / or to move the at least one valve body to a fully open valve seat position.
- the piezo actuator can preferably be designed to move, in particular to actuate, the at least one valve body to (preferably completely) open and/or (preferably completely) close the at least one valve seat (in particular indirectly).
- At least one valve seat or even at least two or at least three valve seats can be preferably fully opened and/or preferably fully closed with (preferably only) a single piezo actuator.
- the piezo actuator preferably serves to actuate the at least one actuating arm and for this purpose can expediently be coupled to the at least one actuating arm.
- the piezo actuator can, for. B. be designed to move the at least one valve body to close and / or open the at least one valve seat by means of the at least one actuating arm.
- the at least one actuating arm can thus in particular form a link between the piezo actuator and the at least one valve body.
- the piezo actuator prefferably has an in particular mechanical preload, in particular to be installed with a preload in order to use the preload to actuate the at least one actuating arm to close the at least one valve seat.
- This can e.g. B. be made possible that the at least one valve seat is automatically closed in particular when the piezo actuator and / or the piezo actuator device z. B. de-energized and / or de-energized.
- the “normally closed” state can thus be achieved by a particular mechanical prestressing of the piezo actuator. There are therefore preferably no additional mechanics for this required such as B. a valve, a spring, a magnet and / or an (additional) piezo actuator. However, such z. For example, the "normally open” status can also be implemented.
- the piezo actuator z. B. with particular electrical excitation energy (z. B. electrical voltage and / or electric current) are supplied.
- the at least one actuating arm is part of a three-bar linkage mechanism.
- the at least one actuating arm can be pivoted about a (appropriately first) joint, and/or the piezo actuator is coupled to the at least one actuating arm via a (appropriately second) joint, and/or the at least one actuating arm via a ( expediently third) joint is coupled to the at least one valve body.
- the first joint expediently, the second joint appropriately and/or the third joint appropriately can, for. B. by a material weakening, z. B. an area of reduced flexural rigidity, in particular relative to two adjacent areas of higher flexural rigidity.
- the weakening of the material and/or the reduced flexural rigidity can preferably be produced by a local reduction in cross section.
- the expedient first joint can preferably form a bearing point z. B. allows rotation of the actuating arm, but preferably can prevent all shifts.
- the first joint can thus z. B. form a fixed bearing.
- the first joint expediently, the second joint appropriately and/or the third joint appropriately can, for. B. be integrally connected to the at least one actuating arm and/or be designed as a flexure joint.
- the actuating arm is preferably a one-piece integral part of a frame.
- the piezo actuator can, for. B. be arranged within the frame and preferably be attached to the frame.
- the frame can B. detachable and / or at least be open on one side.
- the frame can B. substantially U- or L-shaped, z. B. be formed with legs of the same or different lengths and / or obliquely aligned legs.
- the piezo actuator and/or a frame construction discussed below can e.g. B. be aligned substantially in and / or substantially parallel to the plane of the frame.
- the piezo actuator is preferably fixed in its transverse direction on one side (e.g. on the frame) and/or is coupled to the at least one actuating arm on the other side (appropriately directly or indirectly).
- the piezo actuator prefferably has a particularly elastically deformable, metallic and/or shell-shaped frame construction.
- the piezo actuator and / or the frame structure can preferably be elongated and z. B. have a longitudinal axis and a transverse axis z. B. can be aligned substantially perpendicular to each other.
- the frame construction preferably serves to reinforce (in particular increase) an actuating force on the at least one actuating arm and/or can, for. B. be designed as a bending frame.
- At least one piezo-active element eg at least one piezo stack
- at least one piezo-active element eg at least one piezo stack
- the at least one piezoactive element can in particular act on the frame construction from the inside.
- the at least one piezo-active element is preferably used for the longitudinal deformation of the frame structure, z. B. to effect a particularly transversely oriented deformation of the frame structure to generate an actuating force for the at least one actuating arm.
- the at least one piezoactive element can thus preferably act on the frame construction essentially in the longitudinal direction of the frame construction, e.g. B. to generate a (particularly transversely oriented) actuating force on the at least one actuating arm.
- the frame construction is preferably elongate, e.g. B. substantially elliptical to substantially diamond-shaped and / or to substantially annular or circular.
- piezo-active elements e.g. piezo stacks
- the frame construction in the longitudinal direction of the frame construction, e.g. B. to force and / or increase travel.
- the piezo actuator can preferably actuate the at least one actuating arm transversely (e.g. essentially at right angles) to its longitudinal extension.
- the frame construction can preferably actuate the at least one actuating arm transversely (e.g. essentially at right angles) to its longitudinal extension.
- the direction of actuation on the at least one actuating arm can, for. B. substantially parallel or transverse (z. B. substantially perpendicular) to the displacement direction of the at least one valve body.
- the at least one piezoactive element can, for. Example, be made of ceramics, in particular low-voltage ceramics.
- the piezo actuator device can be designed to generate and/or dispense drops of application agent and/or to generate and/or dispense jets of application agent.
- the piezo actuator can preferably be controlled with (expediently electrical) excitation energy, in particular voltage, expediently voltage signals. It is possible for the piezo actuator to be designed and preferably controllable in order (e.g. by changing its electrical excitation energy in particular) to adjust a stroke of the at least one valve body preferably arbitrarily and/or freely, e.g. B. to at least one particular intermediate position between a (expediently fully) closed valve seat position and an appropriately fully open valve seat position, whereby z. B. a throttle function and / or generation of application agent jets can be made possible and alternatively or additionally an application agent droplet size z. B. specifically changed, in particular can be adjusted (z. B. so that a flow rate valve body is specifically changed).
- the stroke of the at least one valve body means in particular a maximum path that the at least one valve body can cover in its longitudinal direction.
- the piezo actuator can thus preferably be designed to the at least one valve body only up to z.
- the stroke to z. B. any intermediate position can be set and / or driven.
- the hub z. B. is adjustable depending on the particular electrical excitation energy of the piezo actuator, in particular is freely selectable.
- the position of the at least one valve body can preferably be controlled precisely at any time.
- a (e.g. electronic) control device is provided.
- the control device z. B. electrical excitation energy for the piezo actuator and / or the piezo actuators are controlled.
- the at least one valve seat can expediently be closed by the at least one valve body by pressing the at least one valve body into the at least one valve seat. This can be done, expediently when dispensing the application agent, with a high actuation frequency (e.g. up to 700 Hz), so that the at least one valve body hits the at least one valve seat with a certain speed and force each time.
- a high actuation frequency e.g. up to 700 Hz
- a particular disadvantage can be that the permanent impact causes high wear (e.g. at the tip of the at least one valve body and/or in the at least one valve seat), or alternatively or additionally, e.g. B. a high-frequency sound is produced at high volume.
- the stroke of the at least one valve body z. B. can be set to one or more intermediate positions and / or can be set so that the at least one valve body at a reduced speed of z. B. essentially 0 m / s hits the at least one valve seat.
- the piezo actuator it is z. It is possible, for example, for the piezo actuator to be designed and preferably controllable in order (e.g. by changing its electrical excitation energy in particular, suitably voltage) to brake the at least one valve body, preferably in such a way that the at least one valve body opens at a reduced speed hits the at least one valve seat. If the at least one valve body is braked in good time before it hits the associated valve seat, a hard impact can advantageously be avoided.
- the braking of the at least one valve body can preferably be adjustable as a function of the particular electrical excitation energy (particularly voltage, expediently voltage signals) for the piezo actuator.
- the control device can preferably be designed to control the electrical excitation energy in particular for the piezo actuator and/or the piezo actuators, e.g. B. to control the stroke and / or braking of the at least one valve body and thus in particular to be able to adjust, and alternatively or additionally, z. B. to be able to control at least two piezo actuators advantageously phase-shifted.
- the control device is in particular an electronic control device and can, for. B. at least one computing unit and / or at least one processor.
- the controller can, for. B. include a memory unit in which control software (z. B. a control program) and / or control logic can be stored, according to which the excitation energy for the piezo actuator and / or the piezo actuators can be controlled.
- control software z. B. a control program
- control logic / or control logic
- control device is distributed with its function on a central control unit or several different hardware components and / or control units.
- the piezo actuator device may include a generator device for generating the excitation energy, in particular voltage (expediently voltage signals) for the piezo actuator and/or the multiple piezo actuators and/or an amplifying device for amplifying the energy generated by the generator device and the excitation energy supplied to the piezo actuator and/or the piezo actuators.
- a generator device for generating the excitation energy, in particular voltage (expediently voltage signals) for the piezo actuator and/or the multiple piezo actuators and/or an amplifying device for amplifying the energy generated by the generator device and the excitation energy supplied to the piezo actuator and/or the piezo actuators.
- the generator device can, for. B. have one or more generators, z. B. for a piezo actuator or multiple piezo actuators.
- the amplifying means may suitably comprise one or more amplifiers, e.g. B. for a piezo actuator or multiple piezo actuators.
- the control device can be designed in particular to control the generator device and/or the amplification device.
- control device can control the excitation energy for the piezo actuator and/or a plurality of piezo actuators, preferably via the generator device and/or the amplification device.
- the control device can expediently also be used to control a large number of piezo actuators.
- control device prefferably to control at least two piezo actuators with a phase offset (e.g. with excitation energy), preferably for generating counter-noise and/or for active noise reduction (expediently "Active Noise Reduction” (“ANR”) - " Anti-noise”), preferably in such a way that, for example, at least two valve bodies hit their valve seat advantageously out of phase and/or at different times.
- phase offset e.g. with excitation energy
- ANR Active Noise Reduction
- Anti-noise Anti-noise
- the control device the at least two piezo actuators z. B. by substantially 180 ° out of phase and / or control by means of at least approximately destructive interference.
- the piezo actuator it is possible for the piezo actuator to be installed with a preload in order to use the preload to actuate the at least one actuating arm to close the valve seat.
- the at least one valve body with a preferably mechanical and / or additional biasing element (z. B. a spring, in particular a coil spring) to generate a bias z. B. is directly or indirectly operatively connected in order to actuate the at least one valve body for closing the at least one valve seat by means of the pretension.
- a preferably mechanical and / or additional biasing element z. B. a spring, in particular a coil spring
- piezoelectric actuator having prestressing and “prestressing element” can, for. B. can be used as alternatives or in combination, z. B. to achieve an increased closing force.
- the at least one valve body can, for. B. by means of a fastener (z. B. screw, bolt, etc.) expediently attached to the at least one actuating arm, wherein the fastener z. B. can be used to accommodate and / or guide the biasing element.
- a fastener z. B. screw, bolt, etc.
- the at least one valve body, the biasing element and / or the fastener can z. B. be arranged substantially coaxially.
- the piezo actuator device can, for. B. have at least one compensating base (z. B. at least one shim plate or shim piece) for position and / or bias adjustment of the at least one valve body.
- the at least one compensation base is preferably at least one adjusting plate. It is Z. B. possible that the piezo actuator device comprises at least one compensating base for common position and / or preload adjustment of at least two valve bodies, so that z. B. by means of one and the same compensating pad, a position and/or preload adjustment of several valve bodies can be made possible.
- valve body z. B. a complete package, preferably all valve bodies, can be adjusted together to a substantially identical preload and/or position.
- the frame is mounted on at least one compensation base or several frames are mounted on at least one compensation base. It is possible that z. B. at least two frames z. B. are mounted on a common compensation pad and / or at least two frames are each mounted on their own compensation pad.
- the piezo actuator device prefferably has a nozzle plate, in particular on the outside, with z. B. at least two, at least three, at least four or at least five valve seats and / or a z. B. corresponding number of output openings for dispensing the application agent.
- At least two dispensing openings can be supplied with application agent by means of a valve body and/or valve seat.
- nozzle plate can thus also z. B. at least two, at least three, at least four or at least five dispensing openings for dispensing application agent.
- the nozzle plate is preferably designed in one piece (e.g. in one piece-integrally and/or continuously) and/or can e.g. B. have a flush front. This can e.g. B. a clean demolition of application agent drops are supported, a low adhesion of application agent are made possible and / or the nozzle plate are easily cleaned.
- the at least two valve seats can, for. B. have a common closing plane.
- Nozzle plates with z. B. nozzle diameters of different sizes can have the same closing plane, so that after a nozzle plate change, the same prestress can be set as before.
- This z. B. a quick nozzle plate change (z. B. necessary because of nozzle plate wear), a quick sealing system change and / or a quick change of nozzle diameter possible.
- the piezo actuator device prefferably has a head piece.
- the nozzle plate can be arranged on the outside of the head piece.
- the head piece can preferably be arranged between the nozzle plate and the lance body described further below.
- the head piece and/or the nozzle plate can be dismantled, in particular for the (preferably output-side) removal of at least one valve body from the piezo actuator device.
- valve body after release (z. B. from the actuating arm and / or with a tool, especially special tool) from the piezo actuator device (z. B. to the front, especially to the output side) can be pulled out.
- the piezo actuator device preferably comprises a sealing system, e.g. B. from several metal plates z. B. a labyrinth seal (z. B. a half or full labyrinth seal) can form.
- the metal plates can, for. B. hard metal plates.
- the sealing system can thus in particular comprise a labyrinth seal, e.g. B. a half or full labyrinth seal.
- the sealing system can be arranged on and/or (expediently at least in sections) in the head piece.
- the individual piezo actuators (in particular the respective functional units) can preferably be controlled independently of one another, in particular separately, whereby z. B. a generation of defined application agent pattern and / or application agent webs with z. B. different cross-sections (z. B. in height and / or width) is made possible with z. B. viscous, especially highly viscous application agent.
- the individual piezo actuators and thus in particular the individual valve bodies can preferably be actuated independently of one another with different actuation frequencies.
- At least two (or at least three, at least four or at least five) valve seats and/or at least two (or at least three, at least four or at least five) dispensing openings for dispensing application agent are formed in one and the same nozzle plate.
- the piezo actuator device can, for. B. at least two (in particular with respect to their longitudinal axes) arranged at an angle to each other actuating arms, frame and / or piezo actuators.
- the piezo actuator device can, for. B. have at least two actuating arms whose longitudinal axes z. B. approach each other in the direction of at least two valve bodies.
- cross sections of at least two actuating arms can taper in the direction of at least two valve bodies. This can e.g. B. a high packing density can be made possible and / or the valve body can be arranged in a small grid.
- the piezo actuator device can, for. B.
- At least two piezo actuators which are preferably arranged offset relative to the longitudinal direction of at least two valve bodies to each other and / or actuate at least two valve bodies of different lengths. This can also z. B. a high packing density can be made possible and / or the valve body can be arranged in a small grid.
- Piezo actuators of the piezo actuator device can thus z. B. on the one hand side by side and / or on the other hand offset relative to the longitudinal direction of the valve body to each other.
- the piezo actuator device can, for. B. include a preferably slit-shaped connection in order to be able to supply the application agent to at least two valve bodies, the connection z. B. can have different passage cross-sections for the particularly substantially uniform distribution of the application agent to the at least two valve bodies.
- the different passage cross-sections are designed in particular for the essentially uniform distribution of the application agent to the at least two valve bodies.
- connection thus serves in particular for the essentially uniform distribution of application agent to spaces, preferably directly in front of the valve seats.
- connection is preferably designed in such a way that it can be used for e.g. B. outer valve body, up to which the application means travels a relatively long way, has a larger passage cross section than e.g. for a particularly central valve body, up to which the application means travels a relatively short way.
- connection z. B. sections in the nozzle plate and / or z. B. is formed in sections in the head piece.
- the piezo actuator device can, for. B. a (in particular individual, e.g. one-piece-integral) guide component, by means of which at least two valve bodies are axially guided in at least two, in particular, axially spaced guide positions and preferably the at least two valve bodies run without bearing between the at least two guide positions.
- a (in particular individual, e.g. one-piece-integral) guide component by means of which at least two valve bodies are axially guided in at least two, in particular, axially spaced guide positions and preferably the at least two valve bodies run without bearing between the at least two guide positions.
- the piezo actuator device may comprise an in particular elongate lance body, on the front side of which the nozzle plate and/or the head piece can be arranged, preferably on the outside.
- valve bodies it is possible for at least two valve bodies to extend in the lance body, preferably essentially in the longitudinal direction of the lance body.
- the piezo actuator device can be a z. B. hood-shaped and / or removable housing that z. B. can be arranged laterally on the outside of the lance body.
- At least two frames, at least two piezo actuators and/or at least two actuating arms may be arranged in the housing.
- At least two actuating arms preferably extend out of the housing and into the lance body in order to be able to actuate, in particular to drive, at least two valve bodies in the lance body.
- the lance body can, for. B. be rotatable about its longitudinal axis and / or be connected to a rotary feedthrough through which the application means can be fed and / or returned.
- the piezo actuator device can, for. B. an application agent feed (z. B. forward) and an application agent return (z. B. return) for application agent circulation include or have at least two application agent feeds, via the z. B. different application agents can be supplied.
- the piezo actuator device can thus in particular also be designed for selectively dispensing different application agents.
- the piezo actuator device is connected to a heating device by means of which the application means can be heated, which z. B. with highly viscous application agent, especially adhesive can be advantageous.
- the housing can B. have at least one cooling opening, via the z. B. heat can be dissipated from the housing.
- the piezo actuator device can have a cooling device (e.g. a fan) in order to apply a cooling fluid (e.g. cooling air) to the housing, in particular to flush and/or flow through it.
- a cooling device e.g. a fan
- the cooling device can, for. B. include a fan etc.
- the cooling can B. by flushing and / or flowing through the housing with air.
- the cooling device can, for. B. can be arranged in the housing or outside of the housing.
- the piezo actuator device can, for. B. include at least two valve bodies that can be moved together by one, in particular a single, piezo actuator (z. B. via one or more actuating arms), z. B. to move the at least two valve bodies (preferably completely) to open and/or to (preferably completely) close at least two valve seats (particularly indirectly), e.g. B. to a fully closed valve seat position and / or to a fully open valve seat position.
- At least one valve seat or even at least two valve seats can be preferably fully opened and/or preferably fully closed with in particular only a single piezo actuator.
- z. B. a piezo actuator and / or an actuating arm is used to z. B. to actuate at least two valve bodies.
- the piezo actuator device can also be designed so that at least two valve bodies are moved together by a single piezo actuator, in particular via at least one actuating arm, whereby valve bodies can preferably be combined to form a functional group.
- the piezo actuator device can, for. B. for generating application agent droplets and / or application agent jets.
- the piezo actuator device can also z. B. for the selective generation of application agent drops and application agent jets.
- the piezo actuator device can, for. B. be formed to the at least one valve body preferably by means of the associated piezo actuator with a z. B. controllable and / or variable operating frequency, z. B with an actuation frequency of z. B. 0 Hz to z. B. at least 300 Hz, at least 400 Hz, at least 550 Hz, at least 650 Hz or over 700 Hz or even over 750 Hz.
- a size and / or a time interval between individual drops of application agent can preferably be varied by changing the operating frequency.
- Different piezo actuators can e.g. B. can be applied with the same or a different operating frequency.
- piezo actuators should preferably be the same (e.g. because of improved interchangeability). However, they can preferably be controlled differently.
- This will e.g. B. enables the application agent, in particular drops of application agent, to be shot onto the component.
- the piezo actuator device thus allows z. B. large application distances, which facilitates an application to hard-to-reach and / or distant application areas.
- the piezo actuator device also preferably enables a defined application of the application agent, as a result of which subsequent work can be reduced or even eliminated entirely.
- the defined application of the application agent can also advantageously reduce the consumption of application agents, whereby z. B. sustainable production can be promoted.
- the piezo actuator device can, for. B. include at least one functional unit, at least one valve body, at least one valve seat, at least one actuating arm, at least one piezo actuator and / or at least one frame.
- the piezo actuator device can, for. B. include at least two, at least three, at least four or at least five functional units, valve body, valve seats, actuating arms, piezo actuators and / or frame.
- the piezo actuator device can, for. B. have more valve body and / or more valve seats than piezo actuators or have the same number of valve bodies and / or the same number of valve seats as piezo actuators.
- the piezo actuator device can, for. B. have more output openings than valve body and / or valve seats.
- a piezo actuator in particular a single piezo actuator, is provided per at least one valve body in order to (preferably by means of at least one actuating arm) open and/or or (particularly complete) closing at least one valve seat to move expediently, e.g. B. to a fully closed valve seat position and / or to a fully open valve seat position
- the piezo actuator can be used to implement the “normally closed” or “normally open” state.
- the piezo actuator device can, for. B. be designed to generate surface applications.
- the piezo actuator device can, for. B. for generating defined appliqué pattern and / or appliqué webs with z. B. different cross sections (z. B. in height and / or width) may be formed.
- the application agent is preferably viscous, in particular highly viscous.
- the at least two valve bodies preferably extend essentially parallel to one another.
- the piezo actuator preferably serves to move and/or actuate at least one valve body, in particular indirectly.
- transverse and/or “transverse direction” etc. as used herein preferably means substantially perpendicular to the longitudinal direction.
- the direction of actuation of the piezo actuator on the at least one actuating arm z. B. can essentially correspond to the transverse direction of the piezo actuator.
- the frame construction z. B. can be formed substantially elliptical and / or diamond-shaped.
- the actuating arm can, for. B. have a gear ratio of preferably between 4: 1 and 2: 1, z. B. a gear ratio of about 3:1.
- the tip of the valve bodies can preferably be of essentially spherical design.
- valve seats, especially the nozzle inlets, z. B. be substantially conical.
- valve bodies are preferably made of metal, in particular hard metal.
- the at least two valve bodies preferably extend essentially parallel to one another, e.g. B. in the lance body.
- the controller can, for. B. control the piezo actuator and / or the piezo actuators in particular directly or indirectly.
- the (expediently electrical) excitation energy for the piezo actuator and/or the piezo actuators can be (expediently electrical) voltage, in particular (expediently electrical) voltage signals.
- the excitation energy for the piezo actuator and/or the piezo actuators can in particular be the excitation energy supplied to the piezo actuator and/or the piezo actuators (expediently directly or indirectly).
- the excitation energy for the piezo actuator and / or the piezo actuators can, for. B. amplified or non-amplified or reduced excitation energy by means of the amplifying device.
- the invention preferably comprises a piezo actuator device, in particular for controlling an output of an application agent onto a component, comprising: at least one (preferably axially back and forth) movable valve body (e.g. a valve needle) for opening and closing at least one valve seat, at least an actuating arm (preferably pivotable, in particular designed as an actuating lever) for actuating the at least one valve body and a piezo actuator, e.g. B. a single piezo actuator, which is preferably designed to move (in particular by means of the at least one actuating arm) the at least one valve body to (preferably completely) close and/or to (preferably completely) open the at least one valve seat (e.g. B.
- a piezo actuator device in particular for controlling an output of an application agent onto a component, comprising: at least one (preferably axially back and forth) movable valve body (e.g. a valve needle) for opening and closing at least one valve seat, at least an actuating arm (preferably pivotable
- the invention includes z. B. a piezo actuator device, in particular for controlling an output of an application agent on a component, with in particular a functional unit, which can include the following, or in particular at least two functional units, each of which can include the following: at least one (preferably axially back and forth) movable Valve body (e.g. a valve needle) for opening and closing at least one valve seat, at least one (preferably pivotable, in particular designed as an actuating lever) actuating arm for actuating the at least one valve body and a piezo actuator, e.g. B.
- a piezo actuator device in particular for controlling an output of an application agent on a component, with in particular a functional unit, which can include the following, or in particular at least two functional units, each of which can include the following: at least one (preferably axially back and forth) movable Valve body (e.g. a valve needle) for opening and closing at least one valve seat, at least one (preferably pivotable, in particular designed as an
- a single piezo actuator which is preferably designed to move (preferably by means of the at least one actuating arm) the at least one valve body to (preferably completely) close and/or to (preferably completely) open the at least one valve seat (e.g. B. to a fully closed valve seat position and / or to a fully open valve seat position.
- the invention includes z. B. also an application device with at least one piezo actuator device as disclosed herein.
- the application device is designed in particular to apply a seam seal to the component.
- the application device can, for. B. have a single or multi-axis (z. B. at least 2, at least 3, at least 4 or at least 5-axis) manipulator, in particular robot for guiding the piezo actuator device.
- z. B. at least 2, at least 3, at least 4 or at least 5-axis
- the piezo actuator device is mounted stationary and thus z. B. is not mounted on any robot or manipulator.
- the controller can, for. B. also serve to control the manipulator disclosed herein, in particular robot.
- the controller can thus z. B. the manipulator control device, in particular the robot control device.
- a detection system e.g. with one or more cameras and/or one or more lasers
- a component measurement preceding the application e.g. B.
- an application result e.g. B. to carry out a quality control, in particular an online quality control.
- a control device can be provided in order to control the application as a function of parameters recorded by means of the recording system.
- the invention also includes a method for a piezo actuator device, preferably for controlling an output of an application agent on a component, in particular for a piezo actuator device and/or an application device as disclosed herein, so that the disclosure of the piezo actuator device and/or or for the application device appropriately also applies to the procedural ren.
- At least one movable valve body can open and close at least one valve seat
- at least one (preferably pivotable) actuating arm can actuate the at least one valve body
- a piezo actuator can move the at least one valve body to close and/or open the at least one valve seat.
- Figure 1 shows a sectional view of a piezo actuator device according to an embodiment of the invention
- FIG. 2 shows a perspective view of the piezo actuator device, in particular with the housing dismantled
- Figure 3 shows a sectional view of the piezo actuator device
- Figure 4 shows a detailed view of Figure 3
- FIG. 5 shows a sectional view of the piezo actuator device, in particular with the housing, head piece and nozzle plate dismantled
- Figures 6 and 7 show different sectional views of the piezo actuator device
- FIG. 8 shows a sectional view of the piezo actuator device
- FIG. 9 shows a plan view of part of the piezo actuator device
- FIGS. 10 to 12 illustrate in particular a functional/actuating principle according to an embodiment of the invention
- FIG. 13 illustrates in particular a functional/actuating principle according to another exemplary embodiment of the invention
- FIG. 14 shows a perspective view of part of the piezo actuator device
- FIG. 15 shows a sectional view in particular of a valve seat and a sealing system of the piezo actuator device
- FIG. 16 shows a sectional view along line SA-SA from FIG. 15,
- FIG. 17 shows a sectional view along line SB-SB from FIG. 15,
- Figures 18 and 19 show different views of a part of a piezo actuator device according to an embodiment of the invention.
- Figure 20 shows a schematic view of a piezo actuator device according to an embodiment of the invention
- FIG. 21 shows a plan view of part of a piezo actuator device according to an exemplary embodiment of the invention
- FIG. 22 shows a perspective view of an application device with a piezo actuator device according to an exemplary embodiment of the invention
- FIG. 23 shows a side view of the application device
- FIG. 24 shows a control scheme for a piezo actuator device according to an exemplary embodiment of the invention.
- a piezo actuator device 100 can in the context of the invention z.
- B. at least one, at least two, at least three, at least four or at least five functional units.
- the “x” being able to represent at least one further, in particular similar or essentially identical, component by way of example.
- FIGS 1 to 9 show different views of a piezo actuator device 100 according to an embodiment of the invention.
- the piezo actuator device 100 is preferably used to control an output of an application agent on a component (z. B. a motor vehicle body component), z. B. for dispensing a sealant, z. B. to seal a seam (e.g. a weld seam or flanged seam etc.).
- the application agent is usually a viscous, in particular highly viscous, application agent.
- the piezo actuator device 100 preferably comprises five functional units in the exemplary embodiment in FIGS at least one further functional unit is available. In the following, however, only the functional unit A1 is usually described, it being expedient for the description to also apply to the at least one further functional unit Ax. However, the invention also includes a piezo actuator device 100 with expediently z. B. only one functional unit Al.
- the functional unit Al or generally the piezo actuator device 100 includes in particular an axially movable back and forth designed as a valve needle valve body 1 for opening and closing a valve seat 2 and a z. B. pivotable, preferably designed as an actuating lever actuating arm 3 for actuating the valve body 1.
- a piezoelectric actuator 4, in particular only a single piezo actuator 4 is provided for the at least one valve body 1 and is designed to actuate and/or move the valve body 1 preferably by means of the actuating arm 3, in particular in such a way that the valve seat 2 is preferably completely closed and/or or can be fully opened.
- the functional unit Ax or generally the piezo actuator device 100 also includes in particular an axially movable valve body lx designed as a valve needle for opening and closing a valve seat 2x and a z.
- a piezo actuator 4x in particular only a single piezo actuator 4x, is provided for the at least one valve body lx and is designed to actuate and/or move the valve body lx, preferably by means of the actuating arm 3x, in particular in such a way that the Valve seat 2x preferably fully closed and / or can be fully opened.
- a functional unit Al, Ax or generally the piezo actuator device 100 preferably at least two movable valve bodies for opening and closing at least two valve seats, at least one (preferably pivotable, e.g. designed as an actuating lever) actuating arm for actuating the at least comprises two valve bodies and one, preferably a single, piezo actuator for moving the at least two valve bodies (preferably via the at least one actuating arm).
- the piezo actuator 4 is preferably elongate with a longitudinal direction L and a transverse direction C (e.g. Figure 1) and can be installed with a mechanical preload in particular and thus in particular have a preload in order to use the preload to move the actuating arm 3 and thus to actuate the valve body 1 for expediently automatic closing of the valve seat 2, in particular when the piezo actuator device 100 is de-energized and/or switched off.
- the closed state of the valve body 1 can thus be achieved by prestressing the piezo actuator 4.
- This can make it possible for the valve seat 2 to be closed without an additional functional assembly (e.g. valve, spring and/or magnet, etc.). and/or is automatically closed without, for example, an electrical energy supply, when the actuator device 100 is de-energized and/or de-energized.
- the piezo actuator 4 also serves in particular to open the valve seat 1 completely, in particular, it being possible for the piezo actuator 4 to be supplied with electrical excitation energy, in particular electrical voltage, for this purpose.
- a single piezo actuator 4 can thus be provided for preferably fully opening and preferably fully closing at least one valve seat 1 .
- the operating arm 3 is preferably part of a frame 20 and a three-bar linkage mechanism which will be explained in more detail below.
- the valve seats 2; 2x and a corresponding number of dispensing openings for dispensing application agent are formed in one and the same nozzle plate 5 .
- the nozzle plate 5 is preferably designed in one piece (e.g. in one piece-integrally and/or continuously) and comprises e.g. B. a substantially flush front. This can e.g. B. a clean demolition of application agent drops are supported, a low adhesion of application agent are made possible and / or the nozzle plate 5 are easily cleaned.
- the nozzle plate 5 is arranged on an outlet side of a head piece 6, in particular mounted thereon, the valve body 1; lx are passed through the head piece 6.
- the head piece 6 and / or the nozzle plate 5 can be dismantled from a lance body 30, so that z. B. worn valve body 1; lx to the front, in particular to the output side of the application means, can be removed from the piezo actuator device 100, in particular pulled out.
- the valve body to be removed 1 z. B. solved with a special tool and then pulled out to the front. This enables easy maintenance and, in particular, quick replacement of worn valve bodies 1; lx.
- valve body assembly and valve body disassembly The principle of valve body assembly and valve body disassembly is indicated schematically by the double arrow in FIG.
- the piezo actuator device 100 also includes a z. B. in Figures 6 and 7 to be seen in an enlarged representation sealing system 8, by means of which the valve body 1; lx can be sealed.
- the sealing system 8 includes z. B. several metal plates, in particular flart metal plates and is preferably a metal-sealing labyrinth seal, in particular Full or half labyrinth seal formed.
- the sealing system 8 is preferably arranged at least in sections in the head piece 6 and/or placed on the head piece 6 .
- the sealing system 8 advantageously has only low friction, which in turn advantageously means low actuating forces for the valve body 1; x means.
- the sealing system 8 also requires only a small amount of installation space and, moreover, advantageously has a long service life.
- the piezo actuator device 100 can also include one or more z. B. to be seen in Figures 1 and 3 compensating pads 7 (z. B. one or more shim plates or shim pieces) for position and / or bias adjustment of one or more valve bodies 1; include lx.
- valve body 1; lx can be adjusted to a substantially equal position and/or bias.
- At least one compensating pad 7 enables an advantageously highly precise position and/or preload adjustment of one or more valve bodies 1; lx. Potential, possibly relatively large manufacturing tolerances can thus be compensated. It is therefore advantageously not necessary to carry out a tolerance selection of parts.
- valve body 1; lx can be positioned essentially the same in particular easily and quickly and/or provided with essentially the same prestress.
- the at least one compensating base 7 preferably serves as a base for one or more of the frames 20, 20x described below.
- a frame 20 is mounted on at least one leveling pad 7 and / or multiple frames 20; 20x are stored on at least one leveling pad 7.
- Several frames 20, 20x can also z. B. be stored on a common leveling pad 7 and / or multiple frames 20; 20x can each be stored on its own compensation pad 7. It has already been described that the piezo actuator 4 can be installed with a mechanical preload and can therefore in particular have a preload in order to actuate the actuating arm 3 and thus the valve body 1 for expediently automatic closing of the valve seat 2 by means of the preload, in particular when the piez actuator device 100 is de-energized and/or de-energized.
- a prestressing element 9 can be used for this purpose, e.g. B. shown in Figure 8.
- valve body 1 instead of or in addition to its own preload, can be directly or indirectly operatively connected to a preload element 9 (e.g. a spring, in particular a coil spring) to generate a preload, in order to use the preload to force the valve body 1 to close the Actuate the valve seat 2, in particular when the piezo actuator device 100 is de-energized and/or switched off.
- a preload element 9 e.g. a spring, in particular a coil spring
- the valve body 1 can be fastened to the actuating arm 3 by means of a fastening element 10 (e.g. screw, bolt etc.), the fastening element 10 advantageously also being able to serve for receiving and/or guiding the pretensioning element 9 .
- a fastening element 10 e.g. screw, bolt etc.
- valve body 1, the biasing element 9 and/or the fastening element 10 are preferably arranged essentially coaxially.
- the guide component 13 which can be seen in FIGS. 1, 3 and 14, is designed in particular as a single component and serves to guide the valve body 1; lx at at least two axially spaced guide positions 13.1 and 13.2, the valve body 1; lx between the at least two guide positions 13.1, 13.2 can preferably run without bearing.
- one and the same guide member 13 for guiding multiple valve body 1; lx be used.
- precise guidance can advantageously be made possible by fewer interfaces between the parts and/or production in one line.
- this can advantageously reduce the friction between the guide component 13 and the valve bodies 1; lx can be reduced to the minimum required for guiding the valve body.
- Figure 9 shows that the actuating arms 3; 3x can be arranged at an angle to one another, with their piezo actuators 4; 4x can preferably also be arranged at an angle.
- longitudinal axes of the actuating arms 3; 3x can move in the direction of the valve body 1; lx approach each other.
- Cross sections of the operating arms 3; 3x can e.g. B. also in the direction of the valve body 1; lx taper. This can e.g. B. essentially a fan and / or trapezoidal shape can be generated.
- the piezo actuator device 100 also comprises an expediently relatively long or relatively short lance body 30, at the head end of which the nozzle plate 5 and/or the head piece 6 is arranged, in particular on the outside, and in which the valve bodies 1; extend lx.
- a housing 21 is arranged laterally on the outside of the lance body 30 .
- the lance body 30 are preferably the valve body 1; lx and the guide member 10 arranged.
- the head piece 6 and the nozzle plate 5 are preferably arranged on the front side of the lance body 30 .
- the housing 21 are preferably the piezo actuators 4; 4x arranged.
- the housing 21 can have one or more ventilation openings and can be connected to a cooling device (e.g. a fan) in order to apply a cooling fluid to the housing 21, in particular to flush it through it.
- a cooling device e.g. a fan
- the operating arms 3; 3x preferably extend out of the housing 21 into the lance body 30, around the valve body 1; to be able to drive lx.
- the functional units A1; Ax are preferably of modular design, in particular starting from the nozzle plate 5 and/or the head piece 6.
- a nozzle plate change is possible, advantageously without prestressing the valve body 1; having to reset lx.
- the nozzle plates 5 used preferably have the same closing plane, which means that after changing to a nozzle plate 5 with, for example, different nozzle diameters, the same prestress can be set again as before.
- Figures 1 to 9 illustrate in particular an embodiment in which a piezoelectric actuator 4; 4x preferably a single piezo actuator 4; 4x, per valve body 1; lx is used, so that in the embodiment z.
- a piezoelectric actuator 4; 4x preferably a single piezo actuator 4; 4x, per valve body 1; lx is used, so that in the embodiment z.
- five piezo actuators 4 and five valve body 1; 1x are present, with, as already mentioned, also exemplary embodiments with more than five or fewer than five piezo actuators 4 together with the same number of valve bodies 1; lx are possible.
- FIGS. 10 to 13 serve in particular to explain a functional/actuating principle according to an exemplary embodiment of the invention.
- the actuating arm 1 is in particular part of a three-joint lever mechanism, with expediently three joints, namely a first joint G1, a second joint G2 and a third joint G3.
- the actuating arm 3 can be pivoted about the first joint Gl.
- the first joint Gl preferably forms a bearing point that allows the actuating arm 3 to rotate, but prevents all displacements.
- the first joint Gl can thus form a fixed bearing.
- the oblong piezo actuator 4 is coupled to the actuating arm 3 via the second joint G2.
- the actuating arm 3 is coupled to the valve body 1 via the third joint G3.
- the actuating arm 3 is preferably a one-piece, integral part of a frame 20 that is preferably open on at least one side, it being possible for the piezoelectric actuator 4 to be arranged in the frame 20 .
- the piezo actuator 4 can be mounted on the frame 20 on one side and fixed on the actuating arm 3 on the other side by means of the second joint G2.
- the piezo actuator 4 can be arranged in the frame 20 in a preferably bearing-free deformable manner, it being possible for it to be suspended in the middle or on the end faces in order to define the installation position.
- all joints G1, G2, G3 are formed by weakening the material, are integrally connected to the actuating arm 3 in one piece and/or are formed as a solid-state joint.
- the piezo actuator 4 preferably includes an elastically deformable frame construction 4.1.
- the frame construction 4.1 can be designed in particular as a flexible clamping frame and/or to increase an actuating force on the actuating arm 3.
- the frame construction 4.1 and/or the piezo actuator 4 can be at least slightly elongated and z. B. actuate the actuating arm 3 transversely to the longitudinal direction L, in particular essentially at right angles to the longitudinal direction L.
- the frame construction 4.1 is preferably formed circumferentially.
- a longitudinal deformation can bring about a transverse deformation, with the transverse deformation being used to actuate the actuating arm 3 .
- the frame construction 4.1 prestress at least one piezoactive element 4.2.
- several piezoactive elements 4.2 are preferably coupled to one another and to the frame construction 4.1 in the longitudinal direction L of the frame construction 4.1, with z. B. in the transverse direction C of the frame structure 4.1. a free space can be provided.
- Valve body 1 rests against valve seat 2 by means of mechanical prestressing (e.g. generated by mechanical prestressing of piezo actuator 4 and/or by prestressing element 9) in order to close valve seat 2 (in particular state: “normally closed”).
- mechanical prestressing e.g. generated by mechanical prestressing of piezo actuator 4 and/or by prestressing element 9
- Piezo actuator 4 in particular piezo stack (z. B. piezo-active elements 4.2) changes its length when subjected to voltage. In particular, deformation of the frame construction 4.1 in the longitudinal direction L.
- Piezo actuator 4 in particular frame construction 4.1, moves actuating arm 3. In particular, deformation of frame construction 4.1 in the transverse direction C.
- Valve body 1 releases valve seat 2, particularly depending on the actuation/switching frequency of piezo actuator 4.
- the piezoelectric actuator 4 is designed to be able to set a stroke of the valve body 1 preferably freely selectable, whereby in particular a maximum path that the valve body 1 can cover in its longitudinal direction can be set expediently.
- the stroke of the valve body 1 depends in particular on the amount of excitation energy (in particular excitation voltage) by means of which the piezo actuator 4, in particular the at least one piezo-active element 4.1 (e.g. piezo stack), is acted upon.
- the piezo actuator 4 in particular the at least one piezo-active element 4.1 (e.g. piezo stack)
- the piezo actuator 4 can thus be designed in particular to set a stroke of the valve body 1 to preferably any intermediate position between a closed valve seat position and a fully open valve seat position, which preferably enables a throttle function and/or generation of application agent jets can be.
- an application agent droplet size in particular can be changed with an adjustable stroke, so that the outflow rate can be changed specifically for the valve body.
- the piezo actuator 4 thus preferably allows not only a fully open valve seat position (and optionally a closed valve seat position), but z. B. also that the stroke of the valve body 1 can be adjusted only up to an intermediate position between the closed valve seat position and the fully open valve seat position.
- valve body lift can preferably be moved to any value in a targeted manner.
- An adjustable stroke in particular a reduced stroke to only an intermediate position, z. B. be advantageous at the beginning of the application and / or at the end of the application.
- the first x drops of application agent (especially at the beginning of the seam) are driven with a reduced stroke to prevent a "hammer head".
- the piezo actuator 4 can also be designed to decelerate the valve body 1, preferably in such a way that the valve body 1 strikes the valve seat 2 at a reduced speed.
- the braking of the valve body 1 z. B. by a change in the excitation energy can be brought about by means of which the piezo actuator 4, in particular the at least one piezo-active element 4.1 (z. B. piezo stack), is applied.
- the braking of the valve body 1 can be implemented by means of a suitable voltage curve at the piezo actuator 4 .
- the piezo actuator device 100 can be a z. 20 and 24, in particular an electronic control device 40 (e.g. a control unit, in particular with control software and/or control logic), by means of which the electrical excitation energy for the piezo actuator 4 and thus the excitation energy supplied to the piezoelectric actuator 4 can be controlled in order in particular to be able to control the stroke and/or the braking of the valve body 1 and thus advantageously be able to adjust it.
- an electronic control device 40 e.g. a control unit, in particular with control software and/or control logic
- Figures 10 to 12 show z. B. an embodiment in which the piezoelectric actuator 4 actuates the actuating arm 3 in an actuating direction and the actuating direction is essentially parallel to the displacement direction of the valve body 1 .
- Figure 13 shows z. B. an embodiment in which the piezo actuator 4 actuates the actuating arm 3 in an actuating direction and the actuating direction is transverse (e.g. substantially perpendicular) to the displacement direction of the valve body 1 .
- FIGS. 10 to 12 and FIG. 13 shows that the installation situation of the piezoelectric actuator 4 can fundamentally advantageously remain the same.
- FIGS. 15 to 17 serve in particular to illustrate an application agent supply to a plurality of valve bodies 1; lx, in particular an application agent supply to the chamber, preferably immediately in front of the valve seats 2; 2x
- a slit-shaped connection 11 with different passage cross sections is provided, via which the application agent can be connected to at least two valve bodies 1; lx can be supplied.
- the different passage cross-sections are for the essentially uniform distribution of the application agent to the at least two valve bodies 1; lx trained.
- the slit-shaped connection 11 can be formed in particular in the head piece 6 and/or in the nozzle plate 5 and can be fed by an application agent supply line 12 on or in the lance body 30 .
- the application agent can thus be applied to the valve body 1; lx are preferably divided substantially equally.
- the slit-shaped connection 11 is in particular designed in such a way that for external valve bodies to which the application agent has to travel a relatively long way, a has a larger passage cross section than, for example, for one or more centrally arranged valve bodies, up to which the path is relatively short.
- the outer valve bodies are supplied with application agent just as well as the inner valve bodies.
- Pressure levels in front of the valve seats are thus advantageously also essentially the same.
- Figures 18 and 19 show different views of a part of a piezo actuator device 100 according to an embodiment of the invention.
- At least two piezo actuators 4; 4x can preferably relative to the longitudinal direction of at least two valve body 1; lx be offset from one another and at least two valve bodies 1 of different lengths; press lx.
- valve body 1; lx can be advantageously arranged in small grid dimensions.
- Figure 20 shows a schematic view of a piezo actuator device 100.
- the piezo actuator device 100 can, for. B. include an application agent supply 25 and an application agent return 26 to have the ability to circulate the application agent. If this can be dispensed with, it is possible to use the application means return 26 as an application means supply, so that the piezo actuator device 100 can be operated with two different application means.
- the piezo actuator device 100 can thus also include at least two application agent feeds, via which different application agents can be fed, in particular for optional application.
- Reference number 27 denotes a pneumatic supply.
- a control device 40 is also shown schematically in FIG. 20, which is designed in particular for controlling the piezo actuators 4, 4x, expediently for controlling the excitation energy for the piezo actuators 4, 4x.
- FIG. 21 shows an embodiment with z. B. three schematically illustrated piezo actuators 4 and z. B. five valve bodies.
- FIG. 21 serves in particular to illustrate an exemplary embodiment in which a piezo actuator 4, in particular a single piezo actuator 4, is used in order to actuate at least two valve bodies, preferably by means of at least one actuating arm 3.
- a single piezo actuator can be used in order to actuate at least two valve bodies, preferably by means of at least two actuating arms.
- the complexity and the costs can advantageously be reduced, it being alternatively or additionally easier to use a piezo actuator device 100 with z. B. to realize at least five or even at least six valve bodies.
- a combination can also be considered in particular if no "high resolution" of the application agent result is required and/or not all valve bodies have to be controlled separately.
- FIG. 21 shows in particular an embodiment with expediently five valve bodies 1; lx and three piezo actuators 4; 4x, although any other divisions are possible, e.g. B. six valve bodies and three piezo actuators or eight valve bodies and three or four piezo actuators, etc.
- FIG. 9 shows for comparison an embodiment in which per valve body 1; lx each preferably a single piezo actuator 4 is provided.
- FIG. 9 shows an exemplary embodiment with, in particular, five valve bodies 1; lx and five piezo actuators 4; 4x.
- the piezo actuator device 100 can thus include the same number of valve bodies as piezo actuators or include more valve bodies than piezo actuators.
- FIGS. 22 and 23 show different views of an application device 200 for applying a seam seal to a component, with a piezo actuator device 100 as disclosed herein.
- the lance body 30 can be rotated about its longitudinal axis and connected to a rotary feedthrough 31, via which the application agent can be fed in and/or returned.
- Reference number 32 denotes an interface for mounting on a robot or manipulator, although exemplary embodiments are also possible in which the application device 200 is mounted in a stationary manner.
- the application device 200 can include a camera or laser-based detection system 33 (shown only schematically) in order to carry out a component measurement and/or to record the application result in order to carry out a preferably online quality control.
- FIG. 24 shows a control scheme, in particular a signal processing scheme for a piezo actuator device 100 according to an exemplary embodiment of the invention.
- a control device 40 is provided, by means of which the excitation energy for the piezo actuator 4 and thus the excitation energy supplied to the piezo actuator 4 can be controlled, in particular via a generator device 50 and an optional amplification device 60, preferably by the stroke and/or the braking of the valve body 1 to control.
- the generator device 50 is used to generate the excitation energy for the piezo actuator 4, in particular to generate (z. B. essentially rectangular, pre-deformed and / or suitable for braking) voltage signals (z. B. -IV to +7V) for Piezo actuator 4. Per piezo z. B. own voltage signals can be generated.
- Control device 40 is used in particular to control generator device 50 and/or amplification device 60.
- the optional amplification device 60 serves to amplify the excitation energy generated by the generator device 50 .
- the voltage signals e.g. -IV to +7V
- the voltage signals can be amplified by the amplification device 60 by a factor of e.g. B. 20 +/-S (e.g. -20V to +140V).
- the amplification device 60 can e.g. B. be arranged in a control cabinet.
- the optionally amplified excitation energy and thus the voltage signals can be fed to the piezo actuator 4 .
- the voltage signals are preferably essentially square-wave voltage signals.
- the piezoelectric actuator 4 can actuate the valve body 1 (preferably via the leverage), in particular accordingly bring about a lift and/or braking of the valve body 1 .
- the shape of the lift and/or deceleration curve can essentially correspond to the curve of the voltage signals generated by the generator device 50 .
- the control scheme can be for a piezo actuator 4 or multiple piezo actuators 4; be used 4 times.
- Advantages of the adjustable stroke and deceleration are e.g. B .: Less wear on the valve body 1 and/or in the valve seat 2 due to fewer strokes and/or reduced force when closing the valve seat 2 by the valve body 1 and alternatively or additionally less noise development, especially in the high-frequency range.
- noise reduction is the use of counter-noise generation and/or active noise reduction (expediently “anti-noise” - “Active Noise Reduction” (“ANR").
- the controller 40 z. B. be designed to expediently control at least two piezo actuators 4, 4x out of phase with excitation energy, preferably in such a way that at least two valve bodies 1, lx out of phase and/or time-delayed meet their valve seat 2, 2x.
- counternoise generation and/or active noise reduction can advantageously be made possible.
- any noise produced by the at least one valve body 1 can be reduced or even essentially eliminated, preferably by phase-shifted activation of the at least one piezo actuator 4x of the at least one other valve body lx.
- the basic idea is therefore to reduce or essentially eliminate the noise produced by at least one valve body 1, expediently by phase-shifted activation of at least one piezo actuator 4x of at least one other valve body 1x.
- the control device 40 can have at least two piezo actuators 4, 4x z. B. by substantially 180 ° out of phase and / or control by means of at least approximately destructive interference.
- the invention includes a piezo actuator device, in particular for controlling an output of an application agent on a component, wherein the piezo actuator device z. B. can include the following or in particular a functional unit of the piezo actuator device can include the following and/or in particular at least two functional units of the piezo actuator device can each include the following: at least one (preferably axially back and forth) movable valve body (e.g. a valve needle ) for opening and closing at least one valve seat, at least one (preferably pivotable, in particular designed as an actuating lever) actuating arm for actuating the at least one valve body and a piezo actuator, e.g. B.
- a piezo actuator e.g. B.
- valve body e.g. valve needle lx valve body, preferably at least one other valve body, e.g. B. Valve needle
- valve seat preferably at least one additional valve seat
- Ax functional unit preferably at least one further functional unit
- biasing element e.g. B. Feather
- biasing element preferably at least one further biasing element, e.g. B. Feather
- fastener e.g. B. screw lOx fastener, preferably at least one other fastener, z. B. Screw
- detection system preferably camera and/or laser-based detection system
- control device in particular electronic control device 50 generator device, preferably for generating (in particular electrical) excitation energy (e.g. voltage, in particular voltage signals) for the piezo actuator 60 amplification device 200 application device
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Coating Apparatus (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021110780 | 2021-04-27 | ||
| DE102021121334.7A DE102021121334A1 (de) | 2021-04-27 | 2021-08-17 | Piezo-Aktorvorrichtung |
| PCT/EP2022/060429 WO2022228968A1 (de) | 2021-04-27 | 2022-04-20 | Piezo-aktorvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4329945A1 true EP4329945A1 (de) | 2024-03-06 |
Family
ID=81748289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22724026.4A Pending EP4329945A1 (de) | 2021-04-27 | 2022-04-20 | Piezo-aktorvorrichtung |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US12465942B2 (de) |
| EP (1) | EP4329945A1 (de) |
| JP (1) | JP2024517177A (de) |
| KR (1) | KR20240009430A (de) |
| DE (1) | DE102021121334A1 (de) |
| MX (1) | MX2023012074A (de) |
| WO (1) | WO2022228968A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023111524A1 (de) * | 2023-05-04 | 2024-11-07 | Atlas Copco Ias Gmbh | Dosierventil |
| KR102851547B1 (ko) * | 2023-12-22 | 2025-08-28 | 주식회사 프로텍 | 점성 용액 도포용 멀티 노즐 펌프 |
| CN119333617B (zh) * | 2024-11-01 | 2025-12-05 | 中国船舶集团有限公司第七一九研究所 | 一种具有有源消声功能的泄压阀 |
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| JP7193804B2 (ja) * | 2019-06-05 | 2022-12-21 | 株式会社サタケ | 圧電アクチュエータ、圧電式バルブ、及び圧電アクチュエータの製造方法 |
| JP7300117B2 (ja) * | 2019-06-28 | 2023-06-29 | 株式会社サタケ | 圧電式バルブ及び該圧電式バルブの製造方法 |
| JP7001296B2 (ja) * | 2020-01-08 | 2022-01-19 | 有限会社メカノトランスフォーマ | 変位拡大機構、アクチュエータ、研磨装置、電子部品処理装置、ディスペンサ、およびエアバルブ |
| JP7424560B2 (ja) * | 2020-09-15 | 2024-01-30 | 有限会社メカノトランスフォーマ | 圧電式バルブ |
-
2021
- 2021-08-17 DE DE102021121334.7A patent/DE102021121334A1/de active Pending
-
2022
- 2022-04-20 KR KR1020237040888A patent/KR20240009430A/ko active Pending
- 2022-04-20 MX MX2023012074A patent/MX2023012074A/es unknown
- 2022-04-20 JP JP2023566653A patent/JP2024517177A/ja active Pending
- 2022-04-20 WO PCT/EP2022/060429 patent/WO2022228968A1/de not_active Ceased
- 2022-04-20 EP EP22724026.4A patent/EP4329945A1/de active Pending
- 2022-04-20 US US18/557,332 patent/US12465942B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20240009430A (ko) | 2024-01-22 |
| US12465942B2 (en) | 2025-11-11 |
| JP2024517177A (ja) | 2024-04-19 |
| US20240207886A1 (en) | 2024-06-27 |
| MX2023012074A (es) | 2023-10-24 |
| WO2022228968A1 (de) | 2022-11-03 |
| DE102021121334A1 (de) | 2022-10-27 |
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