CN103225706A - Piezo Valve - Google Patents
Piezo Valve Download PDFInfo
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- CN103225706A CN103225706A CN2013100380877A CN201310038087A CN103225706A CN 103225706 A CN103225706 A CN 103225706A CN 2013100380877 A CN2013100380877 A CN 2013100380877A CN 201310038087 A CN201310038087 A CN 201310038087A CN 103225706 A CN103225706 A CN 103225706A
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- valve
- valve element
- bending transducer
- piezo electric
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The valve (1) has a valve element (36) arranged in a valve chamber (3) that is defined by a box-shaped valve housing (2), which includes a flat sealing element (42). A propulsive coupling existing between a drive portion (25) and the valve element (36) allows relative input movements in the form of relative translational movements (44a) and tilting movements between the drive portion and the valve element. The valve element is linearly displaceable to perform working movement independent of a bending transducer (12) by a linear guide unit (37) relative to the housing.
Description
Technical field
The present invention relates to a kind of piezo electric valve, it has: the valve bonnet shell that limits valve pocket, in valve pocket, be furnished with the valve element, this valve element has relative with valve seat and the flat seal element put or form such seal element, and so with the mode (antriebsm ig) that drives coupling connection (koppeln) mutually, promptly this valve element can be driven into the operating movement that is close to the valve seat place or leaves from valve seat by this actuation movement to the drive section that can swing under the situation of implementing actuation movement of this valve element and piezoelectric bending transducer (Biegewandler).
Background technique
Such piezo electric valve known from file DE 19949197 A1 comprises the piezoelectric bending transducer, and the one end is clamped in valve bonnet shell place regularly and has can be by applying the drive section that control voltage is swung, this drive section biased valve element.This valve element comprises the matrix and and at least one laminal seal element that put relative with valve seat in the perforation (Durchbrechung) that is fixed on bending transducer.This valve element participate in bending transducer drive section the actuation movement that plays the swing effect and can be impelled the operating movement that shows as arc thus, the valve element sealably clings to relative and the valve seat place of putting or can lift from this valve seat in the scope of this operating movement.
Known piezo electric valve has proposed very high requirement to machining accuracy and assembly precision, so that can guarantee sealing reliably in the state that abuts in the valve seat place of seal element.
The fluid valve that known a kind of piezoelectricity is handled from file EP 1 419 333 B1, therein bending transducer axially be fixed on the place, both sides of valve bonnet shell and in the zone of centre with the recess that is placed in the valve bonnet shell in the valve element of push rod be in during driving is connected.Such valve has such shortcoming, and promptly its big relatively structure length owing to the valve element can only realize with big relatively size.
Described a kind of piezoelectricity type valve in file EP 0 943 812 A1, its bending transducer has been provided with the protection coating of insulating effect, and this bending transducer is constituted and born simultaneously the function of valve element at least in part by elastic material.This protection coating prevents to be loaded with short circuit in the zone of electrode of high voltage being in operation of bending transducer.Yet this valve needs significant cost aspect processing technique, being provided with the protection coating that has enough thickness and have accurate moulding simultaneously, thus can be with relative and guarantee to seal reliably in the valve seat acting in conjunction of putting.
But file WO 01/42698 A1 discloses the valve that a kind of electromagnetic ground is handled, but it has the armature component of oscillating motion, and this armature component is cooperated mutually with the closure member in the recess that is contained in the valve bonnet shell, so that optionally open or closed flow channel.
Summary of the invention
The object of the present invention is to provide the structure of the piezo electric valve that is used to prevent short circuit, it realizes compact size and not too responsive to tolerance.
In order to solve this purpose; be arranged in conjunction with the described feature of beginning; bending transducer at least its drive section place with comprising that the position that itself and valve element are in the zone in contacting is provided with the protection coating that humidity is caused protective action; wherein; in the relative balance exercise of the form of translational motion that allows between these two parts, to be relative at least with the coupling of driving mode connection (Kopplung) that exists between drive section and the valve element and opposing inclined motion (Kippbewegung), and the valve element in order to implement its operating movement not rely on bending transducer by the linear guide device can linearly moving mode be directed with respect to the valve bonnet shell.
In piezo electric valve according to the present invention, obtain the electric parts insulation to be controlled relatively, that around the section of working in service of piezo electric valve, wash away the fluid of (umsp ü len) of the inside of drive section by the protection coating.Protection coating self is positioned at such position, promptly cooperates mutually with drive section and the coupling connection for the purpose valve element that transmits required driving force at this place.Even so; the surperficial inaccuracy that may be caused by this protection coating of bending transducer does not have negative influence to the accurate sealing function of valve element, because valve element and bending transducer disconnect coupling connection (entkoppeln) and do not rely on bending transducer and stand to move guiding about valve bonnet shell and valve seat linear accurately by the linear guide device that exists.Therefore, that the present invention abandons being connected with bending transducer regularly in mechanical aspects and participate in the principle of the valve element of its oscillating motion, and alternatively be provided with the accurate linear guide portion of the valve element that breaks away from bending transducer.Therefore this valve element does not rely on the machining tolerance of bending transducer and build-up tolerance and is directed about the valve seat that is associated very exactly disconnecting under the situation of coupling connection with the actuation movement that shows as arc of bending transducer.Have flat shape (wherein, the sealing element especially is designed to lamellar) in addition by seal element, can extremely compact size realize piezo electric valve.
From dependent claims, learn favourable improvement project of the present invention.
Preferably, the protection coating is a protective paint, and it also can be called as the humidity protective paint based on its function.The protection coating causes the parts shielding of the adverse influence aspect the fluid that flows around bending transducer relatively of the sensitivity of bending transducer.
In particular, the drive section of valve element and bending transducer is so with the mode that drives mutual coupling connection mutually, and promptly it is transverse to the direction of actuation movement slidably movably against each other and this external inclination degrees of freedom that gives all sides between it.By this way, the drive section of bending transducer can be slided at valve element place and/or tilt about the valve element when implementing actuation movement, and do not damage the valve element based on the accurately predetermined orientation of linear guide device about valve seat.
In particular, piezo electric valve is so constructed, and promptly the valve element abuts in the following basal plane place in the face of valve seat of the drive section of bending transducer loosely.
Make the valve element continue to press against the following basal plane place in the face of valve seat of bending transducer if load device, this is favourable.By this way, the deflection of drive section is delivered on the valve element directly and not departing from ground (Verf lsung).
If use piezo electric valve especially by this way, promptly pass the valve passage that is associated with valve seat to be controlled therein pressure medium is supplied in the valve pocket, then the pressure medium of this fluid type can be directly self forms the valve element is pressed loaded medium to bending transducer constantly.
If there is elastic element, so at first guarantee the irrelevant method of operation especially reliably that takies with the valve passage of piezo electric valve as the machinery that loads device.Elastic element one end of such machinery is supported on valve bonnet shell place and the other end is supported on valve element place, and wherein, this elastic element especially is configured to the pressure elastic element.
Piezo electric valve can so be conceived, and promptly bending transducer only can will be delivered on the valve element towards the power that plays the 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 loading device causes or supports the motion of opening of valve element.
An alternative form of implementation of piezo electric valve is arranged to bending transducer can proceed to power transmission on the valve element in two swaying directions of its actuation movement, so that with the valve element or move on in the operating position at valve seat place or move on to from the open position that valve seat lifts.Especially by means of the valve element realize such coupling connection based on the drive structure of form fit with driving mode, this drives the especially true structure of structure, promptly it hides (ü berlappen) drive section at least in part deviating from upside of valve seat.Drive structure example as having grab (Schnapphaken).In any case hook structure is favourable.
But on the direction of the actuation movement of drive section, has certain clearance on the driving coupling connection no problem ground of realizing between the drive section of valve element and bending transducer by means of driving structure.By this way, support the relative movement expected for the purpose of the disconnection coupling of these two parts connection effectively.
Piezo electric valve can be equipped with elastic element as required, and it acts on the valve element on closing direction.Aptly, in one direction any loading device of pretension valve element exactly elastic element only between valve element and valve bonnet shell the effect and do not cooperate with bending transducer.Bending transducer is protected and be relaxed thus.
In principle, the linear guide device can at random be arranged in the valve pocket of valve bonnet shell.Yet if linear guide device (it is transverse to swinging plane, and drive section is swung in this swinging plane when it is handled) is arranged in the vertical side of bending transducer (langsseits) next door, this is considered to be particularly advantageous.By this way, under bending transducer and the guide device that can influence the structure height of piezo electric valve unfriendly of especially desirable digit absorption.Be regarded as especially suitable be, the linear guide device is arranged on the vertical side of bending transducer both sides, thereby realizes the linear guide of symmetry, wherein, bending transducer can be incorporated into its driving force in the valve element in the zone between the linear guide device.
In a preferred design proposal, the linear guide device comprises one or more guide posts, and the valve element can linearity be in this guide post movably and engages.The valve element can have for example guiding eyelet for each guide post, and the valve element utilizes this guiding guiding eyelet slidably to be inserted on the guide post movably.
Replace guide post, for example also can directly have steering channel in the wall of valve bonnet shell, the valve element slidably joins in this steering channel movably.Such steering channel for example is molded into dove-tail.
The elastic element that makes the machinery of the operating movement that is used for supporting the valve element can be placed on linear guide device next door, but or can be unified into element of construction with the linear guide device.There is such possibility in particular, is about to be inserted into coaxially on the existing guide post, thereby draws the arrangement of saving very much the space with helical spring or belleville spring that the mode that pushes works.
Aptly, the member of valve element for combining by a plurality of parts, wherein, that this valve element comprises on the one hand is that material by sealing well constitutes, preferred laminal, flat seal element, and comprises the seal element carrier of carrying sealing element in addition.At this, the sealing component carrier especially is made of wear-resisting plastic materials.Preferably, the sealing element material is fixed on seal element carrier place ordinatedly, for example by bonding or directly in the manufacturing of itself by injection moulding.
If the seal element carrier is such parts of valve element, promptly not only take place with the driving coupling of bending transducer connection but also linear guide about the valve bonnet shell takes place by these parts, this is favourable.For frictional influence is minimized, can apply coating by means of suitable method to the parts that all participate in linear guide when needed, for example utilize the so-called PVD coating (PVD=physical vapor deposition) that produces by deposition.
If in the damage of the emerged in operation seal element of piezo electric valve, but cost is advantageously changed the valve element, and bending transducer can continue unrestrictedly to keep available and no problem ground utilizes again.Therefore this piezo electric valve extremely is easy to safeguard.
Description of drawings
Elaborate the present invention below with reference to the accompanying drawings.Wherein:
Fig. 1 has shown when the case of valve bonnet shell lid has taken off the plan view according to a preferred form of implementation of piezo electric valve of the present invention,
Fig. 2 has shown the longitudinal section of passing piezo electric valve according to the hatching II-II of Fig. 1,
Fig. 3 has shown the cross section that passes piezo electric valve in the zone of valve element according to the hatching III-III of Fig. 2,
Fig. 4 has shown the details diagram of the perspective of piezo electric valve when the case lid has taken off,
Fig. 5 has shown the details diagram of the perspective of the valve element of using in the piezo electric valve of Fig. 1 to Fig. 4,
Fig. 6 shown remodeling piezo electric valve with the similar cross section of Fig. 3, the piezo electric valve of this remodeling has the elastic element of the machinery that resets that is used for the valve element, and
Fig. 7 is to have shown the structural type of another remodeling of piezo electric valve with the similar cross section of Fig. 6, and this structural type has the elastic element that resets that is used for the valve element, and it is compared with the form of implementation of Fig. 6 directly and linear guide device gang.
Embodiment
Describe it on the whole with the piezo electric valve of reference number 1 expression according to a plurality of embodiments below, wherein, as long as do not carry out the explanation of other content in single situation, the content of being explained is applicable to all embodiments.
Piezo electric valve 1 has for example valve bonnet shell 2 of case shape, and it is enclosed in the inner space that is referred to below as valve pocket 3.Valve bonnet shell 2 exemplarily has lower member 2a, its have base wall 4 and around the sidewall 6 that extends upwardly in short transverse 5 from base wall 4.In addition, valve bonnet shell 2 comprises and base wall 4 relative and tegmental wall 8 of putting on short transverse 5, and it is formed by case lid 2b in this embodiment, the case opening 7 by sidewall 6 encirclements of this case lid 2b sealing lower member 2a.In Fig. 1 and 4, do not draw case lid 2b.
The direction explanation of using when the above-mentioned name of face is used for distinguishing better in description subsequently.But in principle, can use piezo electric valve 1, thereby for example front-end face 15 is directed upwards towards or descends basal plane 16 to side or upwards directed to be orientated arbitrarily.
Bending transducer 12 is so directed in valve pocket 3, and promptly basal plane 16a faces base wall 4 under it, yet places with 4 one-tenth spacings ground of this base wall.This external top base 16b and relative with it and have spacing between the tegmental wall 8 put.
Bending transducer 12 exemplarily has the rearward end section that is associated with ear end face 15b, and this end section is called as and keeps section 22 and utilize this end section with suitable manner bending transducer 12 to be remained on valve bonnet shell 2 places.Exemplarily, between bearing 23 that keeps section 22 to be clamped at being molded into base wall 4 places and the schematically illustrated elastic device 24.But bending transducer 12 for example also can be sentenced the mode that is fixed on the case place at its maintenance section 22 by means of filler and fix.
And then the vertical section that extends to front-end face 15a of bending transducer 12 keeps section 22, and this vertical section is called as drive section 25.
Under situation about using with piezoelectric bending transducer 12 electric conductors 26 that contact and that from valve bonnet shell 2, draw, can the control voltage of electricity be applied to piezoelectric bending transducer 12 places by means of the electric control device of not drawing.Thus, the drive section 25 of bending transducer 12 can be under the situation of utilizing anti-(reziprok) piezoelectric effect by impel carry out by double-head arrow point out with respect to the actuation movement 27 that keeps section 22 and valve casing 2.This actuation movement 27 is oscillating motion.Make drive section 25 according to moving direction or upwards on the direction of tegmental wall 8 or by this actuation movement 27 downwards at direction upper deflecting towards base wall 4.Actuation movement 27 is perpendicular to two basal plane 16a, 16b and carrying out in the swinging plane 28 that stretches.
The bending transducer 12 of the structure that has bimorph is constructed and for example represented to piezoelectric bending transducer 12 piezoelectricity ground in known manner.Bending transducer 12 comprises at least one layer that is made of piezoelectric material especially piezoelectric constant, this layer and at least one sluggish material layer (for example spring-like flexible metal or spring-like flexible material with carbon element) aspect piezoelectricity be combined into layer main body and this layer thereon side and downside place respectively by electrode layer encirclement for example vapor deposition or that otherwise apply both sides.Electric conductor 26 is connected conductively with this electrode layer.
Formed the outer closure portion of bending transducer 12 as the extremely thin layer protection coating 32 that applies.This protection coating 32 preferably surrounds the above-mentioned layer parts that comprise electrode of illustrating of bending transducer 12 fully, and wherein, at first importantly electrode is capped in a fluid tight manner.
In this embodiment, whole piezoelectric bending transducer 12 is arranged in the valve pocket 3, and this valve pocket 3 can be filled by fluid to be controlled (for example pressurized air or be in liquid under the pressure) the in service of piezo electric valve 1.Thus, protection coating 32 has formed the outer cover of whole bending transducer 12 at this.In an alternative embodiment,, contact with this fluid so only can be driven into the drive section 25 of carrying out actuation movement 27 at the run duration of piezo electric valve 1 because keep section 22 to be positioned at outside the valve pocket 3.In this case, be provided with protection coating 32 iff drive section 25, this is enough in principle.This protection coating 32 make bending transducer 12 inside structure and the medium insulation of surrounding this bending transducer and especially cause protection at humidity.In particular, this protection coating is made of thin protective paint.By this way, the short circuit of piezoelectric bending transducer 12 or other functional lesion have been got rid of.
Except bending transducer 12, the valve element 36 of constructing discretely about bending transducer 12 is arranged in valve pocket 3.This valve element 36, wherein, can be called as operating movement 38 by the linear motion of 37 enforcements of linear guide device and guiding, and illustrate by double-head arrow in drawing can linearly moving mode guide with respect to valve bonnet shell 2 by linear guide device 37.Operating movement 38 stretches in the plane that is parallel to swinging plane 28, thereby can implement actuation movement 27 and operating movement 38 in plane parallel to each other.Yet operating movement 38 is linear motion, and the actuation movement 27 of drive section 25 is for following the nonlinear motion of arc trend.
The operating movement 38 of valve element 36 can cause by bending transducer 12, the drive section 25 of bending transducer with the mode of transmitting required driving force drivingly with valve element 36 coupling connection mutually.
The seal element 42 that valve element 36 has constructs flatly, preferably lamellar, it also can be called as " sealing gasket " and have circular external frame aptly.Aptly, the material of flexible characteristic constitutes sealing element 42 as the rubber by having.
In the scope of operating movement 38, valve element 36 optionally is positioned in operating position or at least one open position.In operating position, valve element 36 utilizes its seal element 42 to abut in valve seat 35 places under the situation of sealing and therefore blocks controllable valve passage 33.Valve element 36 is so positioned in each open position, be about to seal element 42 and more or less lift from valve seat 35 far, thus open pass the fluid passage of controllable valve passage 33 and be implemented in valve pocket 3 and controllable valve passage 33 between fluid transfer.
Aptly, between the drive section 25 of bending transducer 12 and the valve element 36 with the coupling connection of driving mode below be called as the region adjacent front-end face 15a in coupling connection zone 43.At this place, drive section 25 is implemented maximum stroke in the scope of its actuation movement 27.Protection coating 32 also is present in the coupling connection zone 43 at bending transducer 12 places.One of piezo electric valve 1 is characterized as, and this protection coating 32 does not need local removal, with the acting in conjunction of realization drive section 25 with the driving of valve element 36.Therefore, will bending transducer 12 paint removal in the situation that protection coating 32 is formed by protective paint.This has realized favourable manufacture cost.
Another important aspect of piezo electric valve 1 is, the coupling connection of realizing in coupling connection zone 43 with driving mode between drive section 25 and valve element 36 is realized by this way, promptly realize relative translational motion 44a and banking motion 44b at (promptly between drive section 25 and valve element 36) between the above-mentioned parts, it always is called as relative balance exercise 44.This opposing inclined motion 44b especially makes between drive section 25 and valve element 36 around the inclination of the axis parallel with longitudinal axis 13 becomes possibility.Aptly, translational motion 44a make between drive section 25 and the valve element 36 with the vertical correcting plane of the operating movement that is directed 38 in relative shift movement (Verschiebebewegung) become possibility.By this way, so make drive section 25 and valve element 36 disconnect the coupling connection each other, though promptly drive section 25 can will be used for implementation campaign 38 and essential adjustment power is applied to valve element 36, however simultaneously valve element 36 the nonuniformity that is not subjected to aspect the precision of its operating movement 38 in coupling connection zone 43, to exist influence and correspondingly seal element 42 in operating position, very accurately be positioned on the valve seat 35.
Preferably, linear guide device 37 is so constructed, promptly by the normal orientation in the direction of the predetermined operating movement 38 of this linear guide device 37 and passage aperture 34 consistent and this especially also with short transverse 5 unanimities.
Preferably, construct on valve element 36 multi-part type ground.This valve element 36 is this situation in this embodiment.At this, valve element 36 for example comprises the seal element carrier 45 made by plastic materials and about sealing component carrier 45 seal element 42 independently, these two is unified into the element of construction that can only as one man move with valve element 36 forms.Exemplarily, they are bonding mutually.But seal element 42 also can be by injection moulding at seal element carrier 45 places.
In a kind of unshowned embodiment, 36 of valve elements are made of correspondingly configured seal element 42.
Aptly, valve element 36 is arranged in the zone between drive section 25 and valve seat 35.This valve element 36 is also covered by the drive section 25 that extends across valve seat 35 at this.Valve element 36 has the supporting surface 48 that is configured in seal element carrier 45 places in this embodiment at the upside place of the following basal plane 16a that faces bending transducer 12, and valve element 36 can utilize this supporting surface 48 to abut in the downside place of drive section 25.Preferably, only have the contact of pine between supporting surface 48 and following basal plane 16a, it so realizes slidably mobility, promptly by supporting surface 48 at the slip realization at basal plane 16a place down relative translational motion 44a for the purpose of tolerance balance.
If so electricity is controlled bending transducer 12, be that it is moving on the direction of valve seat 35 in the scope of actuation movement 27, then the direction that bending transducer utilizes its drive section 25 to be pressed onto on the supporting surface 48 and the valve element 36 that therefore will comprise seal element 42 is pressed to valve seat 35 abuts in the operating position at this valve seat place until arrival.
If exist overvoltage (if controllable valve passage 33 is used as supply passage at controllable valve passage 33 places the in service of piezo electric valve 1, then be this situation), bending transducer 12 must overcome the fluid force that reacts on valve element 36 by the closing motion that causes valve element 36.In other words, the fluid that herein is transferred by controllable valve passage 33 is formed on the loaded medium that works between valve bonnet shell and the valve element 36, and it is opening the following basal plane 16a that (promptly in the meaning of lifting from valve seat 35) acts on valve element 36 and thus valve element 36 pressed against constantly drive section 25 on the direction constantly.In such situation shown in Figure 3, the loaded medium that does not need to add is to keep the open position of valve element 36.
If bending transducer 12 is not only supported the closing motion of valve element 36 on one's own initiative, and support it to open motion on one's own initiative, this application according to piezo electric valve 1 is favourable.Be such situation in this embodiment, wherein, described functionally guarantee thus, promptly valve element 36 has in coupling connection zone 43 with drive section 25 and is in drive structure 52 in the engaging of form fit.
Preferably, this drive structure 52 is embodied as hook structure 53, and it hides drive section 25 at least a portion (St ü ckweit) at top base 16b place.
Exemplarily, this hook structure 53 comprises two drive hooks 54 that are configured in seal element carrier 45 places especially single-piece, it is through the edge surface 17a of two vertical sides of bending transducer 12,17b protrudes upward and end regions place at an upper portion thereof is bent or bending, thereby this drive hook 54 hides the part of top base 16b respectively at the fringe region place of two vertical sides.
If drive section 25 moves upward away from valve seat 35 in the scope of actuation movement 27, drive section 25 is pressed to from the below and is hidden its drive hook 54 so, thereby drive section drives valve element 36.
Drive structure 52 and be configured such that assurance is used for the degrees of freedom of the expectation of relative balance exercise 44.In particular, drive section 25 so remains on supporting surface 48 in gapped mode and drives between the hook 54, and promptly it does not rely on valve element 36 and not only can tilt about the longitudinal axis 13 as axis of oscillation but also have very little gap on the short transverse 5 and on horizontal direction 18.In addition, relative movement in the translation between drive section 25 and valve element 36 on the axial direction of longitudinal axis 13 also is possible, thereby compensated consequent positional deviation, promptly operating movement 38 is oscillating motion for the actuation movement 27 of linear motion drive section 25.
The form of implementation of not drawing that drives structure 52 is arranged to valve element 36 and is had the hole that the mode according to eyelet designs, and drive section 25 is passed (hindurchgreifen) this hole in the mode that has the gap.
Guarantee that by linear guide device 37 seal elements 42 are placed on the valve seat 35 very exactly in operating position, and do not rely on the possible machining tolerance of bending transducer 12 and build-up tolerance and do not rely on the measure that exists with the coupling connection of driving mode that is used between bending transducer 12 and valve element 36.
Therefore can realize linear guide device 37 in a different manner, for example can be in the following manner, promptly construct one or more steering channels, but the mode that valve element 36 especially utilizes its seal element carrier 45 to move with sliding linearly joins in this steering channel at the inner face place of the wall of valve bonnet shell 2.Yet the following situation of the design proposal that does not rely on linear guide device 37 is favourable, if promptly linear guide device 37 is arranged in bending transducer 12 vertical side next doors on horizontal direction 18, wherein, owing to symmetrical reason recommendation is that linear guide device 37 is configured in bending transducer 12 vertical side both sides.
In these embodiments, linear guide device 37 is configured to guide post in an advantageous manner.Be furnished with at least one guide post 55 that extends respectively on next door, drive section 25 both sides on short transverse 5 on the horizontal direction 18, it is connected with valve bonnet shell 2 regularly and especially becomes single-piece ground to construct with the wall of valve bonnet shell 2.Each guide post 55 is upwards stretching out towards the direction of tegmental wall 8 from base wall 4.Guide post 55 so arranges that each other in spacing ground promptly bending transducer 12 can utilize its drive section 25 to be bonded between the guide post 55 and especially also and can to pass between it on horizontal 18.
Preferably, the valve element has the moulding of the similar bone that can find out well from Fig. 5, two the narrower guiding segments 47a that have larger-diameter centre portion and stretch out that it has carrying seal element 42 and cooperates with drive section 25 from this centre portion, 47b.
These two embodiments have the linear guide device 37 of same idea.Yet, in the mode that resets of supporting drive section 25 in the initial position of the open position of predetermined valve element 36, produce difference.
Though in the embodiments of figure 3, described initial position only by form fit ground and valve element 36 mutually the coupling connection bending transducer 12 and by causing as the fluid force that might exist, and the elastic element 57 that the embodiment of Fig. 5 and Fig. 6 is correspondingly provided with additional machinery is as loading devices, and it acts on valve element 36 opening constantly on direction.
The elastic element 57 of machinery is configured to the pressure elastic element and an end is supported on base wall 4 places and the other end is supported on valve element 36 places and preferably is supported on seal element carrier 45 places at this.
In the embodiment of Fig. 6, elastic element 57 does not rely on linear guide device 37 and arranges and be preferably located between two guide posts 55 that place bending transducer 12 both sides.Elastic element 57 is especially arranged coaxially with passage aperture 34 and is made of unique pressure spring in this embodiment.
In the embodiment of Fig. 7, elastic element 57 and 37 combinations of linear guide device.They comprise a Flexible element 57a at this for each guide post, and it is inserted on the guide post 55 that is associated coaxially and is supported on base wall 4 (end) and guiding segments 47a, between the 47b (the other end).
Be that as if valve element 36 " flight ground " do not rely on bending transducer 12 and be arranged in the valve bonnet shell 2 and be directed therein jointly for all embodiments of piezo electric valve 1.Valve element 36 is configured to be separated with the bending transducer 12 that works as final controlling element and is separate.Because the disengaging that the driving that exists connects, the definite contact area between drive section 25 and valve element 36 is incoherent in principle, because only determine the reproducible location of seal element 42 about valve seat 35 by linear guide device 37.
There is such possibility in principle, be that elastic element 57 is arranged to support opening of valve element 36 or is also supported it to close (this does not draw) in drawing, wherein, the elastic element that works in the mode of closure directly affacts on the valve element 36 aptly and does not affact on the bending transducer 12, thereby the latter is without undergoing overload.Inserting member or moulding can be realized or be integrated into to elastic element.In the situation that seal element 42 damages, can repair piezo electric valve by the valve element 36 of changing " flight ground " supporting simply.
This embodiment's piezo electric valve 1 is contemplated that two position two-way valve.Except controllable valve element 36, uncontrollable, not controlled valve passage 58 is passed in the valve pocket 3 at this, and this valve passage 58 is in operation and for example can be connected with load to be supplied with.The wall that not controlled valve passage 58 runs through valve bonnet shell 2 exemplarily is base wall 4, and does not rely on the instantaneous position of valve element 36 and be communicated with valve pocket 3 constantly.Cross valve pocket 3 and exist fluid to connect between controllable valve passage 33 and not controlled valve passage 58 in the open position of valve element 36, it is interrupted in the operating position of valve element 36.
Be different from this embodiment, also can in having other functional piezo electric valve (for example in two-bit triplet piezo electric valve or 3-position-3-way piezo electric valve), realize according to measure of the present invention.
Claims (15)
1. piezo electric valve; have the valve bonnet shell (2) that limits valve pocket (3); in described valve pocket (3), be furnished with valve element (36); described valve element (36) has relative with valve seat (35) and the flat seal element (42) put or form such seal element (42); and the drive section (25) that can swing under the situation of implementing actuation movement (27) of described valve element (36) and piezoelectric bending transducer (12) is so with the mode that drives coupling connection mutually; being described valve element (36) can be driven into the operating movement (38) that is close to that described valve seat (35) is located or leaves from described valve seat (35) by this actuation movement (27); it is characterized in that; described bending transducer (12) is located and is being comprised that the position that itself and described valve element (36) are in the zone in contacting is provided with the protection coating (32) that humidity is caused protective action in its drive section (25) at least; wherein; the coupling connection with driving mode that exists between described drive section (25) and described valve element (36) allows at these two parts (25; 36) be the relative translational motion (44a) and the relative balance exercise (44) of the form of opposing inclined motion (44b) between at least, and described valve element (36) is directed in the mode that can move linearly with respect to described valve bonnet shell (2) by linear guide device (37) in order to implement its operating movement (38) not rely on described bending transducer (12).
2. piezo electric valve according to claim 1 is characterized in that, described protection coating (32) is formed by protective paint.
3. piezo electric valve according to claim 1 and 2, it is characterized in that the mode that described valve element (36) utilizes additional inclination degrees of freedom slidably to move with the direction transverse to described actuation movement abuts in the drive section (25) of described bending transducer (12) and locates.
4. according to each described piezo electric valve in the claim 1 to 3, it is characterized in that described bending transducer (12) has in the face of the following basal plane (16a) of described valve seat (35) and described valve element (36) abut in described basal plane (16a) down loosely to be located.
5. piezo electric valve according to claim 4, it is characterized in that, described valve element (36) by or can locate by the following basal plane (16a) that presses against described bending transducer (12) by the loaded medium that between described valve element (36) and described valve bonnet shell (2), works.
6. piezo electric valve according to claim 5 is characterized in that, described loaded medium is formed by the elastic element (57) of machinery.
7. according to each described piezo electric valve in the claim 1 to 6, it is characterized in that described valve element (36) has in two swaying directions of described actuation movement (27) with the drive section (25) of described bending transducer (12) and is in the drive structure (52) that drives in engaging.
8. piezo electric valve according to claim 7 is characterized in that, the drive section (25) of described bending transducer (12) is being hidden on the upside of described valve seat (35) at least in part by the drive structure (52) of described valve element (36).
9. according to claim 7 or 8 described piezo electric valves, it is characterized in that, described drive structure (52) is configured to hook structure (53), and this hook structure has a plurality of drive hooks (54) that partly hide described drive section (25) in described drive section back to the side edge of described valve seat (35) respectively aptly.
10. according to each described piezo electric valve in the claim 1 to 9, it is characterized in that described valve element (36) has with gap and the drive section (25) of described bending transducer (12) coupling connection mutually on the direction of its operating movement (38).
11. according to each described piezo electric valve in the claim 1 to 10, it is characterized in that, limit linear operating movement (38) by described linear guide device (37), the Normal direction by the passage aperture (34) of described valve element (36) encirclement of the direction of this operating movement and controllable valve passage (33) is consistent.
12. according to each described piezo electric valve in the claim 1 to 11, it is characterized in that, described drive section (25) can deflection in swinging plane (28) when its actuation movement (27), wherein, described linear guide device (37) is arranged in vertically side next door of described bending transducer (12) transverse to described swinging plane (28), wherein, described linear guide device (37) especially is positioned at described bending transducer (12) both sides.
13. according to each described piezo electric valve in the claim 1 to 12, it is characterized in that, described linear guide device (37) comprises at least one guide post (55) of arranging about described valve bonnet shell (2) fixed-site ground, locate and linearity to guide described valve element (36) movably at described guide post (55), especially by means of the guiding eyelet that slidably surrounds described guide post (55) movably.
14. piezo electric valve according to claim 13 is characterized in that, at least one guide post (55) lays respectively at vertical side both sides of described bending transducer (12).
15. according to each described piezo electric valve in the claim 1 to 14, it is characterized in that, described valve element (36) has the seal element carrier (45) of the described seal element of carrying (42), described seal element (42) is arranged in described seal element carrier (45) as member independently and locates, and described seal element carrier (45) not only have described valve element (36) be used for described bending transducer (12) with the measure of the coupling connection of driving mode but also have the measure that is used for linear guide of described valve element (36).
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 true CN103225706A (en) | 2013-07-31 |
| CN103225706B CN103225706B (en) | 2016-08-24 |
Family
ID=47625435
Family Applications (1)
| 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559473A (en) * | 2016-07-01 | 2018-01-09 | 波凯特有限及两合公司 | Valve linear actuator and valve |
| CN108604631A (en) * | 2016-02-15 | 2018-09-28 | 埃普科斯股份有限公司 | device for generating atmospheric pressure plasma |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018200635A1 (en) | 2018-01-16 | 2019-07-18 | Festo Ag & Co. Kg | Shape memory actuator device and valve based on this actuator device |
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| 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 |
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| 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 |
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- 2012-01-31 DE DE201210001775 patent/DE102012001775B3/en not_active Expired - Fee Related
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108604631A (en) * | 2016-02-15 | 2018-09-28 | 埃普科斯股份有限公司 | device for generating atmospheric pressure plasma |
| CN107559473A (en) * | 2016-07-01 | 2018-01-09 | 波凯特有限及两合公司 | Valve linear actuator and valve |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012001775B3 (en) | 2013-02-21 |
| CN103225706B (en) | 2016-08-24 |
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