CN103225706B - Piezo electric valve - Google Patents
Piezo electric valve Download PDFInfo
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- CN103225706B CN103225706B CN201310038087.7A CN201310038087A CN103225706B CN 103225706 B CN103225706 B CN 103225706B CN 201310038087 A CN201310038087 A CN 201310038087A CN 103225706 B CN103225706 B CN 103225706B
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- valve
- valve element
- piezo electric
- bending transducer
- drive section
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Classifications
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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
- F16K31/005—Piezo-electric benders
- F16K31/006—Piezo-electric benders having a free end
Abstract
The present invention relates to a kind of piezo electric valve (1), it has the piezoelectric bending converter (12) with swingable drive section (25) and comprises valve element (36), and this valve element (36) couples with drive section (25) and by linear guide device (37) mutually with directed relative to valve bonnet shell (2) movably mode.Driving between drive section (25) and valve element (36) couples to implement into and makes to realize the relative balance exercise for tolerance balance between these two parts.
Description
Technical field
The present invention relates to a kind of piezo electric valve, its with: limit valve pocket valve bonnet shell, valve element it is disposed with in valve pocket, this valve element has and the flat potted component put relative with valve seat or forms such potted component, and the drive section swingable in the case of implementing to drive motion of this valve element and piezoelectric bending converter (Biegewandler) so in the way of driving (antriebsm ig) couple mutually (koppeln), i.e. this valve element can be driven into, by this driving campaign, the working motion carrying out being close to leave at valve seat or from valve seat.
Background technology
From file DE 19949197 A1, known such piezo electric valve comprises piezoelectric bending converter, and its one end is fixedly clamped at valve bonnet shell and has the drive section that can swing by applying to control voltage, this drive section biased valve element.This valve element includes being fixed on the matrix in the perforation (Durchbrechung) of bending transducer and at least one laminal potted component that is relative with valve seat and that put.What this valve element participated in the drive section of bending transducer plays driving motion and thus can being prompted to the working motion carrying out showing as arc of swing effect, in the scope of this working motion valve element sealably cling to relative and at the valve seat put or can lift from this valve seat.
Known piezo electric valve proposes the highest requirement to machining accuracy and assembly precision, in order to can ensure in the state at valve seat to seal reliably abutting in of potted component.
From file EP
Known in 1 419 333 B1 a kind of pressing electrically-energized fluid valve, bending transducer is axially fixed at the both sides of valve bonnet shell and valve element with the push-down being placed in the recess of valve bonnet shell is in drive connection in middle region wherein.Such valve has the disadvantage that, i.e. it can only realize with relatively large size due to the relatively large structure length of valve element.
At file EP
Describing a kind of piezoelectric type valve in 0 943 812 A1, its bending transducer has been provided with the protection coating of insulating effect, and this bending transducer is made up of elastomeric material at least in part and undertakes the function of valve element simultaneously.This protection coating prevents the short circuit being in operation in the region of the electrode being loaded with high voltage at bending transducer.But, this valve needs significantly cost in terms of process technology, to be provided with enough thickness and simultaneous with the protection coating of accurate moulding, thus can ensure sealing reliably in jointly acting on relative and that put valve seat.
File WO
01/42698 A1 discloses a kind of valve that can electromagnetically handle, and it has the armature component of swingable motion, and this armature component cooperates mutually with the closure member in the recess being contained in valve bonnet shell, in order to is selectively opened or closes flow channel.
Summary of the invention
It is an object of the invention to provide the structure of piezo electric valve for preventing short circuit, it realizes compact dimensioning and less sensitive to tolerance.
In order to solve this purpose, it is arranged in conjunction with the feature described in beginning, bending transducer at least at its drive section be provided with the protection coating that humidity is caused protective effect at the position including its region being in contacting with valve element, wherein, the coupling in a driving manner (Kopplung) existed between drive section and valve element allow the most at least in relative translational motion with the relative balance exercise of the form of relative banking motion (Kippbewegung), and valve element does not relies on bending transducer and by linear guide device with directed relative to the linearly displaceable mode of valve bonnet shell to implement its working motion.
According in the piezo electric valve of the present invention, the electric parts of the inside obtaining drive section by protection coating are the most to be controlled, the insulation of fluid that is that wash away (umsp ü len) in the operation of piezo electric valve around work section.Protection coating self is positioned at such position, cooperates mutually with drive section and couples to transmit the purpose valve element of required driving force the most in this place.Even so; the surface inaccuracy that may be caused by this protection coating of bending transducer does not has negative impact to the accurate sealing function of valve element, couples (entkoppeln) because valve element and bending transducer disconnect and does not relies on bending transducer and stand to guide about valve bonnet shell and the linear accurately mobile of valve seat by the linear guide device existed.Therefore, the present invention abandons the principle of valve element that is that be connected with bending transducer regularly and that participate in its oscillating motion in mechanical aspects, and is alternatively provided with the accurate linear guide portion of the valve element departed from bending transducer.This valve element be thus independent on the machining tolerance of bending transducer and build-up tolerance and with bending transducer show as arc drive motion disconnect couple in the case of extremely accurate directed about the valve seat being associated.In addition be there is by potted component flat shape (wherein, this potted component is specifically configured to lamellar), the compactest size can realize piezo electric valve.
That learns the present invention from dependent claims is advantageously improved scheme.
Preferably, protection coating is protective paint, and it is also referred to as humidity protective paint based on its function.Protection coating causes the shielding of the sensitive parts of the bending transducer adverse influence relatively in terms of the fluid flowed around bending transducer.
In particular, the drive section of valve element and bending transducer so mutually couples in the way of driving, and i.e. it gives the tilting freedom of all sides against each other and the most in-between transverse to the slidable movement ground, direction driving motion.By this way, the drive section of bending transducer can be slided and/or about valve organs incline when implementing and driving motion at valve element, and do not damage valve element based on linear guide device about the precisely predetermined orientation of valve seat.
In particular, piezo electric valve is constructed so as to, i.e. valve element abut in loosely bending transducer drive section in the face of valve seat lower basal plane at.
If load device make valve element persistently press against bending transducer in the face of valve seat lower basal plane at, this is favourable.By this way, the deflection of drive section will directly and be delivered on valve element without departing from ground (Verf lsung).
If using piezo electric valve the most by this way, be supplied in valve pocket by pressure medium through the valve passage being associated with valve seat to be controlled the most wherein, then the pressure medium of this fluid-type can become to be pressed against valve element constantly directly from figure the loaded medium of bending transducer.
If there is be used as load device machinery elastic element, then first ensure with the valve passage of piezo electric valve take the unrelated particularly reliable method of operation.Elastic element one end of such machinery is supported at valve bonnet shell and the other end is supported at valve element, and wherein, this elastic element is especially configured to compressive resilience device.
Piezo electric valve can so be conceived, i.e. bending transducer only can will be delivered on valve element towards the power playing pushing effect on the direction of valve seat.In this case, if the drive section of bending transducer is arranged from valve seat, then mentioned load device cause or support valve element open motion.
One alternative form of implementation of piezo electric valve is arranged to the power transmission that bending transducer can proceed on valve element in it drives two swaying directions of motion, in order to by valve element or move on in the closing position at valve seat or move on to from the open position that valve seat lifts.Realizing such coupling in a driving manner, the especially true structure of this driving structure particular by the driving structure based on form fit in valve element, i.e. it hides (ü berlappen) drive section on the upside deviate from valve seat at least in part.Driving structure such as can have grab (Schnapphaken).In any case, hook structure is favourable.
The driving realized between valve element and the drive section of bending transducer by means of driving structure couples and can have certain gap on the direction driving motion of drive section without problems.By this way, the purpose that couples for the disconnection of both parts is effectively supported and desired relative movement.
Piezo electric valve can be as required equipped with elastic element, and it acts on valve element on closing direction.Aptly, the device exactly elastic element that arbitrarily loads of pretension valve element only acts between valve element and valve bonnet shell and does not cooperates with bending transducer in one direction.Thus bending transducer is protected and is relaxed.
In principle, during linear guide device can be arbitrarily arranged in the valve pocket of valve bonnet shell.But, if linear guide device (it is transverse to swinging plane, and drive section swings in this swinging plane when it is handled) is arranged in bending transducer longitudinal direction side (langsseits) side, this is considered to be particularly advantageous.By this way, the most desirable digit absorption under bending transducer and the guide device of the structure height that can negatively affect piezo electric valve.Being considered particularly suitable, linear guide device is arranged on both sides, bending transducer longitudinal direction side, thus realizes the linear guide of symmetry, and wherein, bending transducer can drive it power in the region between linear guides part and be incorporated in valve element.
In a preferred design, linear guide device comprises one or more guide post, and valve element can be in joint with this guide post the most movably.Valve element can have such as one for each guide post and guide eyelet, and valve element utilizes this guiding to be inserted on guide post with guiding eyelet slidable movement.
Replace guide post, the most also directly can there is guiding groove in the wall of valve bonnet shell, be joined in this guiding groove to valve element slidable movement.Such guiding groove is such as molded into dove-tail.
Can will make for supporting that the elastic element of the machinery of the working motion of valve element is placed on linear guide device side, but or construction unit can be unified into linear guide device.There is a likelihood that in particular, helical spring or the disk spring that will work in the way of pushing are inserted on existing guide post coaxially, thus show that very joint space-efficient disposes.
Aptly, valve element is by the component of multiple component combinations, and wherein, on the one hand this valve element comprises that be made up of, the most laminal, flat potted component the material sealed well, and comprises the potted component carrier carrying this potted component in addition.Here, this potted component carrier is especially made up of wear-resisting plastic material.Preferably, this seal element material is fixed at potted component carrier ordinatedly, such as, be molded by bonding or direct passing through in the manufacture of itself.
If such parts that potted component carrier is valve element, i.e. not only occurring the driving with bending transducer to couple by these parts but also the linear guide about valve bonnet shell occurs, this is favourable.In order to make frictional influence minimize, by means of suitable method, the parts of all participation linear guides can be applied cover layer when needed, such as, utilize the so-called PVD cover layer (PVD=physical vapour deposition (PVD)) produced by deposition.
If the damage of the emerged in operation potted component at piezo electric valve, can cost-effectively change valve element, and bending transducer can continue unrestrictedly keep available and recycle without problems.Therefore this piezo electric valve is highly susceptible to safeguard.
Accompanying drawing explanation
The present invention is elaborated below according to accompanying drawing.Wherein:
Fig. 1 shows the top view of a preferred form of implementation of the piezo electric valve when the case lid of valve bonnet shell takes off according to the present invention,
Fig. 2 shows the longitudinal section through piezo electric valve of the hatching II-II according to Fig. 1,
Fig. 3 shows in the region of valve element the cross section through piezo electric valve of the hatching III-III according to Fig. 2,
Fig. 4 shows the details diagram of the perspective of piezo electric valve when case lid takes off,
Fig. 5 shows the details diagram of the perspective of the valve element of application in the piezo electric valve of Fig. 1 to Fig. 4,
Fig. 6 shows the cross section similar with Fig. 3 of the piezo electric valve of remodeling, and the piezo electric valve of this remodeling has the elastic element of the machinery of the reset for valve element, and
Fig. 7 shows the version of another remodeling of piezo electric valve with the cross section similar with Fig. 6, and this version has the elastic element of the reset for valve element, and it is directly united with linear guide device compared with the form of implementation of Fig. 6.
Detailed description of the invention
Describing its piezo electric valve represented on the whole with reference number 1 below according to multiple embodiments, wherein, as long as not carrying out the explanation of other content in single situation, the content explained is applicable to all of embodiment.
Piezo electric valve 1 has the valve bonnet shell 2 of such as box like, and it is enclosed in the inner space being referred to below as valve pocket 3.Valve bonnet shell 2 exemplarily has lower component 2a, and it is with base wall 4 and the sidewall 6 upwards stretched on short transverse 5 from base wall 4 of cincture.Additionally, valve bonnet shell 2 comprise with base wall 4 in short transverse 5 relative to and the tegmental wall 8 put, it forms by case lid 2b in this embodiment, and this case lid 2b closes the case opening 7 surrounded by sidewall 6 of lower component 2a.Do not draw case lid 2b in figures 1 and 4.
Piezoelectric bending converter 12 is positioned in the inside of valve bonnet shell 2.This bending transducer 12 has the longitudinal shape with longitudinal axis 13 and is specifically configured to flake.This bending transducer 12 has elongated and preferably substantially rectangle cross section transverse to longitudinal axis 13, and this can find out from Fig. 3, Fig. 6 and Fig. 7 well.The outside 14 of bending transducer 12 is divided into two front end face 15a reversely with each other and rear end face 15b, two large-area lower basal plane 16a reversely with each other and top base 16b and two same first vertical side of the edge face (Randfl che) 17a reversely with each other and the second vertical side of the edge face 17b.Two end face 15a, 15b point on the axis direction of longitudinal axis 13, and two basal plane 16a, 16b orient in short transverse 5 and the edge surface 17a, 17b of two longitudinal sides point on the horizontal direction 18 vertical with short transverse 5 and longitudinal axis 13.
The direction explanation of the application when the above-mentioned name in face is for better discriminating between in the description that follows.But in principle, it is possible to use piezo electric valve 1 with arbitrary orientation, thus such as front end face 15 is directed upwards towards or lower basal plane 16 is to side or upwardly-directed.
Bending transducer 12 so orients in valve pocket 3, and i.e. its lower basal plane 16a is in the face of base wall 4, but places with becoming spacing with this base wall 4.This external top base 16b and there is spacing between the tegmental wall 8 put corresponding thereto.
Bending transducer 12 exemplarily has the trailing end sector being associated with rear end face 15b, and this end section is referred to as keeping section 22 and utilizing this end section to be maintained at valve bonnet shell 2 by bending transducer 12 in an appropriate manner.Exemplarily, keep section 22 to be clamped to be molded between the bearing 23 at base wall 4 and the elastic device 24 schematically shown.But, bending transducer 12 the most also can keep fixing in the way of being fixed at case at section 22 at it by means of filler.
And then the longitudinal section extending to front end face 15a of bending transducer 12 keeps section 22, and this longitudinal section is referred to as drive section 25.
In the case of applying electric conductor 26 that is that contact and that draw from valve bonnet shell 2 with piezoelectric bending converter 12, by means of the electronic-controlled installation do not drawn, the control voltage of electricity can be applied at piezoelectric bending converter 12.Thus, the drive section 25 of bending transducer 12 can be prompted to carry out in the case of utilizing anti-(reziprok) piezo-electric effect by double-head arrow point out relative to keeping section 22 and the driving campaign 27 of valve casing 2.This driving campaign 27 is oscillating motion.By this driving campaign 27 make drive section 25 according to the direction of motion or upwards towards tegmental wall 8 side upwardly or downwardly at the direction upper deflecting towards base wall 4.Drive motion 27 being perpendicular to two basal plane 16a, 16b and the swinging plane 28 that stretches is carried out.
Construct and such as represent the bending transducer 12 of the structure with bimorph piezoelectric bending converter 12 piezoelectricity in known manner.Bending transducer 12 comprises at least one layer being made up of piezoelectric especially piezoelectric ceramics, this layer and at least one sluggish material layer (metal of the most spring-like elasticity or the material with carbon element of spring-like elasticity) in terms of piezoelectricity be combined at layer main body and this layer side thereon and downside respectively by such as vapour deposition or the electrode layer that is otherwise applied as surround both sides.Electric conductor 26 is connected conductively with this electrode layer.
The coating 32 of protecting applied as the thinnest layer defines the covering closing part of bending transducer 12.This protection coating 32 surrounds the above-mentioned layer parts including electrode illustrated of bending transducer 12 the most completely, wherein, first it is important that electrode is capped in a fluid tight manner.
In this embodiment, whole piezoelectric bending converter 12 is arranged in valve pocket 3, and this valve pocket 3 can be filled by fluid to be controlled (such as compressed air or the liquid under being in pressure) in the operation of piezo electric valve 1.Thus, protection coating 32 defines the outer cover of whole bending transducer 12 at this.In an alternative embodiment, because keeping section 22 to be positioned at outside valve pocket 3, contact so only can drive into, at the run duration of piezo electric valve 1, the drive section 25 being driven moving 27 with this fluid.In this case, being provided with protection coating 32 iff drive section 25, this is enough in principle.This protection coating 32 makes the structure of the inside of bending transducer 12 and surrounds the dielectric insulation of this bending transducer and especially cause the protection for humidity.In particular, this protection coating is made up of thin protective paint.By this way, short circuit or other the functional lesion of piezoelectric bending converter 12 are eliminated.
In addition to bending transducer 12, the valve element 36 constructed discretely about bending transducer 12 is positioned in valve pocket 3.This valve element 36 is by linear guide device 37 to guide relative to the linearly displaceable mode of valve bonnet shell 2, and wherein, the linear movement can implemented by linear guide device 37 and guide is referred to as working motion 38, and is illustrated by double-head arrow in drawing.Working motion 38 stretches in the plane being parallel to swinging plane 28, thus can implement to drive motion 27 and working motion 38 in plane parallel to each other.But, working motion 38 is linear movement, and the motion 27 that drives of drive section 25 is the nonlinear motion following arc trend.
The working motion 38 of valve element 36 can be caused by bending transducer 12, drivingly couples with valve element 36 phase in the way of the drive section 25 of bending transducer driving force needed for transmission.
Valve element 36 has the potted component 42 constructed flat, the most lamellarly, and it is also referred to as " sealing gasket " and have the outline of circle aptly.Aptly, this potted component 42 is made up of the material with characteristic elastic as rubber.
Potted component 42 is relative with valve seat 35 and put in short transverse 5, and valve seat 35 is arranged at the inner face of base wall 4 and especially by the jut of the flanged type of base wall 4 and is formed.Valve seat 35 surrounds the passage aperture 34 of the controllable valve passage 33 being passed in valve pocket 3, and this valve passage 33 runs through the wall of valve bonnet shell 2 and especially runs through base wall 4.Utilize that term " controllable " should show is can to affect the fluid passage by controllable valve passage 33 by the common effect of valve element 36 with valve seat 35.
In the scope of working motion 38, valve element 36 is selectively positioned in closing position or at least one open position.In closing position, valve element 36 utilizes its potted component 42 abut at valve seat 35 in the case of sealing and therefore block controllable valve passage 33.In each open position, valve element 36 is so positioned, and will the farthest lift from valve seat 35 by potted component 42, thus opens through the fluid passage of controllable valve passage 33 and the fluid transfer that realizes valve pocket 3 and controllable valve passage 33.
Aptly, the region adjacent front end face 15a referred to below as coupling region 43 coupled in a driving manner between the drive section 25 and valve element 36 of bending transducer 12.In this place, drive section 25 implements the stroke of maximum in it drives the scope of motion 27.Protection coating 32 exists at bending transducer 12 and couples in region 43.One feature of piezo electric valve 1 is, this protection coating 32 need not the removal of local, to realize the common effect of the drive section 25 driving with valve element 36.Therefore, need not be by bending transducer 12 paint removal in the case of protection coating 32 is formed by protective paint.This achieves favourable manufacturing cost.
Another important aspect of piezo electric valve 1 is, the coupling and realize by this way in a driving manner between drive section 25 and valve element 36 realized in coupling region 43, i.e. realizing relative translational motion 44a and banking motion 44b between above-mentioned parts (i.e. between drive section 25 and valve element 36), it is generally referred to as relative balance exercise 44.This relative banking motion 44b especially makes between drive section 25 and valve element 36 inclination around the axis parallel with longitudinal axis 13 be possibly realized.Aptly, the relative shift movement (Verschiebebewegung) that translational motion 44a makes between drive section 25 and valve element 36 in the balancing plane vertical with directed working motion 38 is possibly realized.By this way, drive section 25 and valve element 36 is so made to be disconnected from each other and couple, although i.e. drive section 25 can will be used for implementation campaign 38 and required adjustment power is applied to valve element 36, however simultaneously valve element 36 in terms of the precision of its working motion 38 not by being affected and correspondingly potted component 42 is highly precisely positioned on valve seat 35 in closing position coupling inhomogeneities present in region 43.
Preferably, linear guide device 37 is constructed so as to, i.e. the direction by the predetermined working motion 38 of this linear guide device 37 is consistent with the normal orientation in passage aperture 34 and also the most consistent with short transverse 5 at this.
Preferably, construct valve element 36 multi-piece type.This valve element 36 is this situation in this embodiment.Here, valve element 36 includes the potted component carrier 45 be such as made up of plastic material and about the independent potted component 42 of this potted component carrier 45, both is unified into the construction unit that can the most as one man move of valve element 36 form.Exemplarily, they mutually bond.But, potted component 42 also by injection molding at potted component carrier 45.
Valve element 36 couple for the driving with drive section 25 and the measure taked for the linear guide about valve bonnet shell 2 realize at potted component carrier 45.
In a kind of unshowned embodiment, valve element 36 is only made up of correspondingly configured potted component 42.
Aptly, valve element 36 is disposed in the region between drive section 25 and valve seat 35.This valve element 36 is also covered by the drive section 25 extending across valve seat 35 at this.Valve element 36 has, at the upside in the face of the lower basal plane 16a of bending transducer 12, the supporting surface 48 constructed in this embodiment at potted component carrier 45, and valve element 36 may utilize this supporting surface 48 and abuts at the downside of drive section 25.Preferably, only existing the contact of pine between supporting surface 48 and lower basal plane 16a, it so realizes slidable movement, i.e. realizes the relative translational motion 44a of the purpose for tolerance balance by supporting surface 48 sliding at lower basal plane 16a.
If so electricity manipulation bending transducer 12, i.e. it is moving upward towards the side of valve seat 35 in the scope driving motion 27, then bending transducer utilizes its drive section 25 to be pressed onto on supporting surface 48 and therefore the valve element 36 including potted component 42 presses to the direction of valve seat 35 until arriving and abutting in the closing position at this valve seat.
If there is overvoltage in the operation of piezo electric valve 1 at controllable valve passage 33 (if controllable valve passage 33 is used as feed path, it is then this situation), bending transducer 12 must react on the fluid force of valve element 36 by causing the closing motion of valve element 36 to overcome.In other words, the fluid being herein pumped through controllable valve passage 33 is formed between valve bonnet shell and valve element 36 loaded medium worked, and it acts on valve element 36 the most in the direction of the opening and is thus pressed against constantly by valve element 36 at the lower basal plane 16a of drive section 25 (i.e. from the meaning that valve seat 35 lifts).Figure 3 illustrates such in the case of, it is not necessary to additional loaded medium is to maintain the open position of valve element 36.
If bending transducer 12 the most only actively supports the closing motion of valve element 36, and supports that it opens motion on one's own initiative, this is advantageously applied according to piezo electric valve 1.Be such situation in this embodiment, wherein, described functional thus ensure, i.e. valve element 36 has the driving structure 52 being in the joint of form fit with drive section 25 in coupling region 43.
Preferably, this driving structure 52 is embodied as hook structure 53, and it hides drive section 25 at least some of (St ü ckweit) at top base 16b.
Exemplarily, this hook structure 53 comprises two the drive hooks 54 constructed at potted component carrier 45 especially single-piece, it is through the edge surface 17a of two longitudinal sides of bending transducer 12,17b protrudes upward and is bent or bending at end regions at an upper portion thereof, thus this drive hook 54 hides a part of top base 16b at the fringe region of two longitudinal sides respectively.
If drive section 25 moves upward away from valve seat 35 in the scope driving motion 27, then drive section 25 presses to hide it from below and drives hook 54, thus drive section drives valve element 36.
Driving structure 52 is configured to ensure the desired free degree for relative balance exercise 44.In particular, drive section 25 is so maintained at supporting surface 48 in the way of having gap and drives between hook 54, and i.e. it does not relies on valve element 36 and not only can tilt about the longitudinal axis 13 as axis of oscillation but also have the least gap in short transverse 5 and on horizontal direction 18.In addition, on the axis direction of longitudinal axis 13, the relative motion of translation between drive section 25 and valve element 36 is also possible, thus compensate for consequent position deviation, i.e. for linear movement, the driving campaign 27 of drive section 25 is oscillating motion to working motion 38.
The form of implementation do not drawn of driving structure 52 is arranged to valve element 36 and has the hole that the mode according to eyelet designs, and drive section 25 passes (hindurchgreifen) this hole in the way of with gap.
Ensure that potted component 42 is extremely accurate placed on valve seat 35 in closing position by linear guide device 37, and do not rely on the possible machining tolerance of bending transducer 12 and build-up tolerance and do not rely on for the coupling and the measure that exists in a driving manner between bending transducer 12 and valve element 36.
Therefore may be realized in various forms linear guide device 37, such as can be in the following manner, i.e. at the inner face of the wall of valve bonnet shell 2 construct one or more guiding grooves, valve element 36 especially with its potted component carrier 45 by can linear slide move in the way of be joined in this guiding groove.But the design situations below not relying on linear guide device 37 is favourable, if i.e. linear guide device 37 is arranged in the longitudinal side, side of bending transducer 12 on horizontal direction 18, wherein, due to reasons of symmetry it is recommended that linear guide device 37 constructs in the longitudinal both sides, side of bending transducer 12.
In these embodiments, linear guide device 37 is configured to guide post in an advantageous manner.Be respectively disposed with in short transverse 5 at least one guide post 55 extended on horizontal direction 18 on side, drive section 25 both sides, it is connected with valve bonnet shell 2 regularly and especially constructs with becoming single-piece together with the wall of valve bonnet shell 2.Each guide post 55 is upwards protruding upward towards the side of tegmental wall 8 from base wall 4.Guide post 55 is so arranged each other in spacing on horizontal 18, i.e. bending transducer 12 can utilize its drive section 25 to be bonded between guide post 55 and the most also can pass in-between.
Valve element 36 and especially its potted component carrier 45 extend on horizontal direction 18 under drive section 25 and utilize two guiding segments 47a, and 47b extends over bending transducer 12 in longitudinal side on reverse side.Guiding segments 47a, each in 47b is directed in the way of can being moved linearly by a desired direction being in working motion 38 in two guide posts 55.This is accomplished by this embodiment, will guiding segments 47a, 47b is contemplated that guiding eyelet (Fuehrungsaugen) and defines bullport 56 accordingly, guiding segments 47a, 47b utilize this bullport 56 by can slide axially mobile in the way of be inserted on the guide post 55 being associated.The valve element 36 very smooth mobility about guide post 55 can be ensured by suitable cover layer.
Preferably, valve element has the moulding of the similar bone can found out well from Fig. 5, its with carrying potted component 42 and cooperate with drive section 25 there is larger-diameter centre portion and two narrower guiding segments 47a stretched out from this centre portion, 47b.
The two embodiment has the linear guide device 37 of same idea.But, the mode of the reset in support drive section 25 to the initial position of the open position of predetermined valve element 36 produces difference.
Although in the embodiments of figure 3, described initial position causes only by the bending transducer 12 shape-ordinatedly coupled with valve element 36 phase and by the fluid force existed if possible, and the embodiment of Fig. 5 and Fig. 6 is correspondingly provided with the elastic element 57 of additional machinery as loading device, it acts on valve element 36 the most in the direction of the opening.
The elastic element 57 of machinery is configured to compressive resilience device and one end is supported at base wall 4 and the other end is supported at valve element 36 and is preferably supported at potted component carrier 45 at this.
In the embodiment in fig 6, elastic element 57 does not relies on linear guide device 37 and arranges and be preferably located between two guide posts 55 being placed in bending transducer 12 both sides.Elastic element 57 is especially arranged coaxially with passage aperture 34 and is made up of unique compression spring in this embodiment.
In the embodiment of Fig. 7, elastic element 57 combines with linear guide device 37.They comprise a Flexible element 57a at this for each guide post, and it is inserted on the guide post 55 being associated and is supported on base wall 4 (one end) and guiding segments 47a coaxially, between 47b (other end).
For all of embodiment of piezo electric valve 1 common, valve element 36 seem " flight ground " do not rely on bending transducer 12 and be arranged in valve bonnet shell 2 and the most directed.Valve element 36 is configured to be separated and separate with the bending transducer 12 worked as actuator.The disengaging of the drive connection owing to existing, the definite contact area between drive section 25 and valve element 36 is essentially incoherent, because only being determined the potted component 42 reproducible location about valve seat 35 by linear guide device 37.
Valve element 36 can run in the way of pressure support ventilation, i.e. utilize the support caused by the pressure of fluid to be controlled, but or alternatively or addedly link by corresponding with drive section 25 or couple that (this such as can be realized by the hook structure 53 illustrated, wherein, drive hook 54 be also configured to grab (Schnapphaken) in addition) support.
There is a likelihood that in principle, i.e. elastic element 57 is arranged to support opening or also supporting that it closes (this does not draws in drawing) of valve element 36, wherein, the elastic element worked in the way of Guan Bi is applied directly to aptly on valve element 36 and is not applied on bending transducer 12, thus the latter is without undergoing overload.Flexible member can realize or be integrated into insert or moulding.In the case of potted component 42 damages, piezo electric valve repaired by the valve element 36 that can support by changing " flight ground " simply.
The piezo electric valve 1 of this embodiment is contemplated that two position two-way valve.In addition to controllable valve element 36, uncontrollable, not controlled valve passage 58 is passed in valve pocket 3 at this, and this valve passage 58 is in operation and such as can be connected with load to be supplied.Not controlled valve passage 58 runs through the wall of valve bonnet shell 2 and is illustratively base wall 4, and does not relies on the instantaneous position of valve element 36 and connect with valve pocket 3 constantly.Crossing valve pocket 3 in the open position of valve element 36 to exist between controllable valve passage 33 and not controlled valve passage 58 and fluidly connect, it is interrupted in the closing position of valve element 36.
It is different from this embodiment, also can realize the measure according to the present invention in other functional piezo electric valve (such as in two-bit triplet piezo electric valve or 3-position-3-way piezo electric valve).
Claims (17)
- null1. a piezo electric valve，With the valve bonnet shell (2) limiting valve pocket (3)，Valve element (36) it is disposed with in described valve pocket (3)，Described valve element (36) has and the flat potted component (42) put relative with valve seat (35) or forms the flat potted component (42) relatively put with valve seat (35)，And described valve element (36) so couples with the drive section (25) swingable in the case of implementing to drive motion (27) of piezoelectric bending converter (12) in the way of driving mutually，The most described valve element (36) can be driven into, by this driving campaign (27), the working motion (38) carrying out being close to described valve seat (35) place or leave from described valve seat (35)，It is characterized in that，Described bending transducer (12) at least its drive section (25) place be provided with the protection coating (32) that humidity is caused protective effect at the position including its region being in contacting with described valve element (36)，Wherein，Between described drive section (25) and described valve element (36) exist in a driving manner couple permission in both parts (25,36) at least in the relative balance exercise (44) of relative translational motion (44a) with the form of relative banking motion (44b) between，And described valve element (36) does not relies on described bending transducer (12) and by linear guide device (37) with directed by the way of can being moved linearly by relative to described valve bonnet shell (2) to implement its working motion (38).
- Piezo electric valve the most according to claim 1, it is characterised in that described protection coating (32) is formed by protective paint.
- Piezo electric valve the most according to claim 1 and 2, it is characterized in that, described valve element (36) utilizes additional tilting freedom to abut in drive section (25) place of described bending transducer (12) in the way of the described direction slidable movement driving motion.
- Piezo electric valve the most according to claim 1 and 2, it is characterized in that, described bending transducer (12) has in the face of lower basal plane (16a) and the described valve element (36) of described valve seat (35) abut in described lower basal plane (16a) place loosely.
- Piezo electric valve the most according to claim 4, it is characterized in that, described valve element (36) by or the lower basal plane (16a) of described bending transducer (12) can be pressed against by the loaded medium worked between described valve element (36) and described valve bonnet shell (2).
- Piezo electric valve the most according to claim 5, it is characterised in that described loaded medium is formed by the elastic element (57) of machinery.
- Piezo electric valve the most according to claim 1 and 2, it is characterized in that, described valve element (36) has the driving structure (52) being in described two swaying directions driving motion (27) during drive engages with the drive section (25) of described bending transducer (12).
- Piezo electric valve the most according to claim 7, it is characterized in that, the drive section (25) of described bending transducer (12) is hidden on the upside back to described valve seat (35) at least in part by the driving structure (52) of described valve element (36).
- Piezo electric valve the most according to claim 7, it is characterized in that, described driving structure (52) is configured to hook structure (53), and this hook structure has aptly and multiple respectively partially hides the drive hook (54) of described drive section (25) in described drive section back to the side edge of described valve seat (35).
- Piezo electric valve the most according to claim 1 and 2, it is characterized in that, described valve element (36) band drive section (25) with described bending transducer (12) with a gap on the direction of its working motion (38) couples mutually.
- 11. piezo electric valves according to claim 1 and 2, it is characterized in that, limiting linear working motion (38) by described linear guide device (37), the direction of this working motion is consistent with the normal direction in the passage aperture (34) surrounded by described valve element (36) of controllable valve passage (33).
- 12. piezo electric valves according to claim 1 and 2, it is characterized in that, described drive section (25) can be in the middle deflection of swinging plane (28) when it drives motion (27), wherein, described linear guide device (37) is arranged in the longitudinal side, side of described bending transducer (12) transverse to described swinging plane (28).
- 13. piezo electric valves according to claim 1 and 2, it is characterized in that, described linear guide device (37) comprises at least one guide post (55) being fixedly arranged about described valve bonnet shell (2) position, can guide described valve element (36) the most movably at described guide post (55) place.
- 14. piezo electric valves according to claim 13, it is characterised in that at least one guide post (55) lays respectively at the both sides, longitudinal side of described bending transducer (12).
- 15. piezo electric valves according to claim 1 and 2, it is characterized in that, described valve element (36) has the potted component carrier (45) carrying described potted component (42), described potted component (42) is arranged in described potted component carrier (45) place as independent component, and described potted component carrier (45) not only have described valve element (36) for described bending transducer (12) measure coupled in a driving manner and also there is the measure for linear guide of described valve element (36).
- 16. piezo electric valves according to claim 12, it is characterised in that described linear guide device (37) is positioned at described bending transducer (12) both sides.
- 17. piezo electric valves according to claim 13, it is characterized in that, surround the guiding eyelet of described guide post (55) described valve element (36) can be guided at described guide post (55) place the most movably by means of slidable movement.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210001775 DE102012001775B3 (en) | 2012-01-31 | 2012-01-31 | Piezo valve i.e. 2/2-way piezo valve, has valve element arranged in valve chamber and linearly displaceable to perform working movement independent of bending transducer by linear guide unit relative to valve housing |
| DE102012001775.8 | 2012-01-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103225706A CN103225706A (en) | 2013-07-31 |
| CN103225706B true CN103225706B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310038087.7A Expired - Fee Related CN103225706B (en) | 2012-01-31 | 2013-01-31 | Piezo electric valve |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103225706B (en) |
| DE (1) | DE102012001775B3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016102585A1 (en) * | 2016-02-15 | 2017-08-17 | Epcos Ag | Apparatus for generating an atmospheric pressure plasma |
| DE102016112115A1 (en) * | 2016-07-01 | 2018-01-04 | Bürkert Werke GmbH | Valve linear drive and valve |
| DE102018200635A1 (en) | 2018-01-16 | 2019-07-18 | Festo Ag & Co. Kg | Shape memory actuator device and valve based on this actuator device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343894A (en) * | 1991-09-30 | 1994-09-06 | Hoerbiger Ventilwerke Aktiengesellschaft | Piezo valve |
| US5669416A (en) * | 1993-06-18 | 1997-09-23 | Siemens Aktiengesellschaft | Servo-valve |
| DE29819856U1 (en) * | 1998-11-06 | 1999-01-14 | Festo Ag & Co | Control element of a piezo valve |
| CN2399574Y (en) * | 1999-11-17 | 2000-10-04 | 吴忠仪表股份有限公司 | Piezoelectric pericon valve |
| CN1354335A (en) * | 2000-11-20 | 2002-06-19 | 费斯托合资公司 | Piezoelectric valve |
| CN101755157A (en) * | 2007-07-20 | 2010-06-23 | 贺尔碧格自动化技术控股股份有限公司 | piezoelectric valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT407432B (en) * | 1998-03-18 | 2001-03-26 | Hygrama Ag | PIEZOELECTRIC VALVE |
| DE19958913A1 (en) * | 1999-12-07 | 2001-06-28 | Bosch Gmbh Robert | Electromagnetically actuated valve |
| DE10161888A1 (en) * | 2001-08-14 | 2003-02-27 | Continental Teves Ag & Co Ohg | Piezo-electrically operated fluid valve |
| DE202005014561U1 (en) * | 2005-09-15 | 2005-12-15 | Festo Ag & Co. | Piezoelectric bending transducer for use in piezoelectric valve, has supporting body exhibiting coefficient of elasticity greater than specified Pascal and specified thermal coefficient of expansion by utilization of carbon-fiber |
-
2012
- 2012-01-31 DE DE201210001775 patent/DE102012001775B3/en not_active Expired - Fee Related
-
2013
- 2013-01-31 CN CN201310038087.7A patent/CN103225706B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343894A (en) * | 1991-09-30 | 1994-09-06 | Hoerbiger Ventilwerke Aktiengesellschaft | Piezo valve |
| US5669416A (en) * | 1993-06-18 | 1997-09-23 | Siemens Aktiengesellschaft | Servo-valve |
| DE29819856U1 (en) * | 1998-11-06 | 1999-01-14 | Festo Ag & Co | Control element of a piezo valve |
| CN2399574Y (en) * | 1999-11-17 | 2000-10-04 | 吴忠仪表股份有限公司 | Piezoelectric pericon valve |
| CN1354335A (en) * | 2000-11-20 | 2002-06-19 | 费斯托合资公司 | Piezoelectric valve |
| CN101755157A (en) * | 2007-07-20 | 2010-06-23 | 贺尔碧格自动化技术控股股份有限公司 | piezoelectric valve |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012001775B3 (en) | 2013-02-21 |
| CN103225706A (en) | 2013-07-31 |
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