CN110219846A - A kind of high-speed driving device towards two-dimensional valve - Google Patents
A kind of high-speed driving device towards two-dimensional valve Download PDFInfo
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- CN110219846A CN110219846A CN201910434746.6A CN201910434746A CN110219846A CN 110219846 A CN110219846 A CN 110219846A CN 201910434746 A CN201910434746 A CN 201910434746A CN 110219846 A CN110219846 A CN 110219846A
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- 238000012546 transfer Methods 0.000 claims description 22
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- 230000008569 process Effects 0.000 claims description 8
- 238000002834 transmittance Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 22
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- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 38
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- 238000005859 coupling reaction Methods 0.000 description 38
- 239000003921 oil Substances 0.000 description 18
- 230000033001 locomotion Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
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- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
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- 230000005619 thermoelectricity Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
- F16K31/007—Piezo-electric stacks
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- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses the high-speed driving devices for two-dimensional valve, including driver and couple transmission mechanism；It is driven using the Two-dimensional Liquid pressure valve of the high-speed driving device by electrostriction part (such as piezoelectric stack), pressure hole, low pressure hole on two-dimentional spool end shoulders intersect with the oblique waist typed through hole on valve pocket respectively, form two small opening areas, constitute flowed friction half-bridge, sensitive cavity it is pressure controlled in the flowed friction half-bridge；So that be arranged symmetrically about poppet shaft two piezoelectric stacks is generated couple using inverse piezoelectric effect, then act on two-dimentional spool by couple transmission mechanism to make its rotation, and then change sensitive cavity pressure, control valve core is axially moved；It is using electrostriction part (such as piezoelectric stack) as driver, the characteristic with high frequency sound and high power output；Small in size, energy density is big, compact-sized；It is low in energy consumption, not by electromagnetic interference etc.；The combination of the couple transmission mechanism and two-dimensional valve realizes across the order of magnitude amplification of electrostriction part (such as piezoelectric stack) thin tail sheep, has the function of that amplification factor is big, control precision is high, can be achieved at the same time high pressure and big flow.
Description
Technical field
The present invention relates to electrohydraulic control system fields, more specifically to the high-speed driving device for two-dimensional valve.
Background technique
The development of new function material and providing using for hydraulic control valve realization high frequency sound as driving element
New approach, thus, the driving of the new materials such as piezoelectric ceramics (Piezoelectric, PZT), marmem, ultra-magnetic telescopic
Hydraulic valve is got the attention, wherein piezoceramic material is quick with its dynamic response, control precision is high, energy density is big,
The advantages that compact-sized, not by electromagnetic interference, become the hot spot of Recent study.
Currently, in such a way that the hydraulic valve of new function material mostly uses push directly on spool greatly, by taking piezo electric valve as an example,
Due to the physical characteristic of piezoceramic material itself, even if using the structure for the formula that stacks, output displacement still very little causes defeated
Outflow very little, this hydraulic valve for being almost all Piezoelectric Ceramics includes the equal face such as switch valve, proportioning valve and servo valve
The bottleneck problem faced.Piezoelectric ceramic actuator position is solved frequently with the mechanical displacements method mechanism such as lever, bridge-type at present
Small bottleneck problem is moved, these enlargers are generally used flexible hinge structure, and generally existing receiving load is small, shock resistance energy
The problems such as power is poor, it may be said that the limit is had reached by the method that flexible hinge obtains spool displacement amplification, is difficult to break through therefore,
Solve the problems, such as that displacement equations are the key that the hydraulic control valves of Piezoelectric Ceramic while realizing high frequency sound and big flow.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, providing simple and compact for structure
High-speed driving device for two-dimensional valve.
The technical solution adopted by the present invention to solve the technical problems is: providing a kind of high-speed driving for two-dimensional valve
Device, comprising: actuation part, for by electrostriction mode generate the spool axis body relative to the two-dimensional valve it is tangential on straight line
Deformational displacement；And the transfer part of the actuation part is connected, the straight line deformational displacement for generating the actuation part passes to this
The spool or valve pocket of two-dimensional valve are tangentially made with driving the spool or valve pocket axis body to rotate by changing the actuation part
Torque arm length firmly to generate different turn displacement equations effects, and then passes through the spiral servo mechanism controls spool
Axially open.
Preferably, the actuation part includes actuating element and regulating device, the transfer part include spool clamping device with
Resetting apparatus.In one embodiment, the actuating element uses piezoelectric stack, and the regulating device is a pair of self-locking wedge block
With adjusting bolt, the spool clamping device is to select one or more locking coupling blocks, and lock spool or valve pocket by bolt,
The resetting apparatus is preferable selection reset spring.
In other embodiments, actuating element may use other devices, the construction possibility of regulating device and resetting apparatus
The locking mode of variation, spool clamping device and spool or valve pocket is not limited to bolt fastening, can also be integrally formed between the two
Processing.
In one embodiment, the actuation part further includes for preventing the actuation part to drive the spool or valve pocket to do double
To step when turn, interfered between spool axis body.
Further, the transfer part include for reduce the actuation part in the straight line deformational displacement transmittance process with
The transfer part generates the support part of friction.
Further, the actuation part includes for guaranteeing that it is described that the straight line deformational displacement of the actuation part is effectively transferred to
The pre-tightening apparatus of transfer part.
A kind of high-speed driving method for two-dimensional valve is realized on the basis of the above embodiments, comprising: is stretched by electroluminescent
Contracting mode generate the spool axis body relative to the two-dimensional valve it is tangential on straight line deformational displacement；The straight line that the actuation part is generated
Deformational displacement passes to spool or the valve pocket of the two-dimensional valve to drive the spool or valve pocket to rotate, while should by changing
The torque arm length of actuation part tangential forces to generate different turn displacement equations effects, and then passes through a spiral servo machine
Structure controls the axially open of the spool.
Implementation the device of the invention or method can produce following the utility model has the advantages that the high-speed driving device for two-dimensional valve
The transmission mechanism for using high frequency actuating element (such as piezoelectric stack) driving to be placed in the two dimension valve body is to drive the two-dimensional valve
Spool generates rotation, and the straight line deformation energy that piezoelectric stack is generated is as the movement energy for driving spool axis body rotation, simultaneously
It can be by changing the torque arm lengths of the actuation part tangential forces, to generate different turn displacement equations effects, Jin Ertong
Cross the axially open of the suitable spiral servo mechanism controls spool.According to the force couple role of the actuation part when transmission mechanism
There are eccentricity (i.e. the arm of force), level-one amplification is possessed at the couple transmission mechanism, and combines two-dimentional (2D) spiral servo
Rotation at mechanism --- direct acting displacement equations act on (second level amplification), will under the valve body structure significantly simplified compared with conventional art
Electrostriction part (such as piezoelectric stack) generate deformational displacement amplified twice, such driving device using piezoelectric stack as
Driver, the characteristic with high frequency sound and high power output；Small in size, energy density is big, compact-sized；It is low in energy consumption, not by electromagnetism
Interference etc.；The combination of the couple transmission mechanism and two-dimensional valve, realize electrostriction part (such as piezoelectric stack) thin tail sheep across
Order of magnitude amplification has the function of that amplification factor is big, control precision is high, can be achieved at the same time high pressure and big flow.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is a kind of high-speed driving device towards two-dimensional valve that the present invention is preferably implemented；
Fig. 2 is the section of wet type piezoelectricity two dimension (two-dimentional (2D)) electro-hydraulic high-speed switch valve that present pre-ferred embodiments provide
Structural schematic diagram；
Fig. 3 is spool in switch valve shown in FIG. 1, piezoelectric actuator and couple transmission mechanism Mating graph；
Fig. 4 is the spool sectional view in switch valve shown in FIG. 1；
Fig. 5 is piezoelectric actuator and couple transmission mechanism locations of structures relational graph in switch valve shown in FIG. 1；
Fig. 6 is the locking coupling block in switch valve shown in FIG. 1 in couple transmission mechanism.
Fig. 7 is the seal closure in switch valve shown in FIG. 1.
Fig. 8 is switch valve working motion exploded view shown in FIG. 1；
Fig. 9 is the explanatory diagram of the spool displacement amplification relational graph in any embodiment of the present invention；
Figure 10 is the structure of two-dimentional (2D) electro-hydraulic proportional reducing valve of semibridge system piezo-electric type that present pre-ferred embodiments provide
Schematic diagram；
Figure 11 is the schematic diagram of the section structure of two-dimentional (2D) electro-hydraulic proportional reducing valve of the invention；
Figure 12 is relief valve body sectional view shown in Fig. 10；
Figure 13 is the structural schematic diagram of pressure reducing valve piezoelectricity shown in Fig. 10 control section；
Figure 14 is pressure reducing valve valve core structure figure shown in Fig. 10；
Figure 15 is that a kind of wet type that the present invention is preferably implemented simplifies outside two-dimentional (2D) the electro-hydraulic high speed reversal valve of full-bridge piezo-electric type
Shape figure；
Figure 16 is reversal valve schematic diagram of internal structure figure shown in figure 15；
Figure 17 is change valve internal structure chart shown in figure 15；
Figure 18 is reversal valve piezo electric module structural schematic diagram shown in figure 15.
Figure 19 is reversal valve piezo electric module mounting structure schematic diagram shown in figure 15；
Figure 20 is change-over valve core sectional view shown in figure 15；
Figure 21 is two-dimentional (2D) the screw-in cartridge valve cross-section structure signal of a kind of semibridge system piezo-electric type that the present invention is preferably implemented
Figure；
Figure 22 is screw-in cartridge valve lateral piezoelectric actuation part structural schematic diagram shown in Figure 21.
Figure 23 is the integral type bellows axonometric drawing of screw-in cartridge valve shown in Figure 21.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.In the description of the present invention, it is to be understood that, term "left", "right" etc. is only used for describing
Purpose is not understood to indicate or imply relative importance.
High-speed driving device in terms of the present invention one total, for this two-dimensional valve can include: actuation part is used
In generated by the stretch modes such as (for example) electroluminescent, optics, thermoelectricity or mangneto the spool axis body relative to the two-dimensional valve it is tangential on
Straight line deformational displacement；And the transfer part of the actuation part is connected, the straight line deformational displacement for generating the actuation part passes
Spool or the valve pocket of the two-dimensional valve are passed to drive the spool or valve pocket to rotate, while tangential by changing the actuation part
The torque arm length of active force to generate different turn displacement equations effects, and then passes through the spiral servo mechanism controls valve
The axially open of core.
It is as shown in Figure 1 a kind of available high-speed driving device towards two-dimensional valve of preferred version of the present invention, specifically,
In a typical example, actuation part 1 includes adjusting bolt 3 and piezoelectric stack 4；Transfer part includes pre-tightening reset spring 5, locking
Coupling block 6 and linear bearing 7.The adjusting bolt 3 and piezoelectric stack 4 be concentric to be connected as a driving unit, the pair of
Driving unit is axially and symmetrically disposed about poppet shaft, and the axle center of above-mentioned a pair of of driving unit is not overlapped；The pair of linear axis
It holds 7 to be installed on a pair of cylinder about poppet shaft axially symmetric disposition on locking 6 surface of coupling block, the described piezoelectricity
It stacks 4 and is pressed by pre-tightening reset spring 5 in the surface of linear bearing 7；6 center of locking coupling block is by being equipped with and poppet shaft
Direction is consistent and the spline that can work in coordination with spool, and tapped through hole is equipped on the direction in vertical poppet shaft for fastening valve
Core；The spring base for clamping coupling block 5 and being equipped with pre-tightening the cooperation of reset spring 5.
As shown in Fig. 2 to Fig. 8, a kind of two-dimentional electrohydraulic valve for implementing the above-mentioned high-speed driving device towards two-dimensional valve is provided
Valve mainly includes switch valve and the high-speed driving device.The switch valve is using piezoelectric stack as driver.One
In a little embodiments, other suitable actuating elements can also be used.
Specifically, the switch valve include seal closure 11, valve body 12, right cover plate 13, spool 14, valve pocket 15, plug 16 and
Left plug ring 17.There is the cavity for installing above-mentioned piezoelectric actuator and transfer part enough in seal closure 11, and opens in two sides that there are two spiral shells
Pit 112 couples with stud 31 is adjusted, and valve body 14 and left plug ring 17 are close to form seal chamber in another side.
Under the construction, elongated damping hole is formed between Zuo Saihuan 17 and spool 14, and the oil liquid outside the two dimension valve system is drawn
Enter the seal chamber to form wet type environment, can be taken away by the low pressure oil of flowing among piezoelectric stack itself generation or transmission
The heat that part rubs mutually generates efficiently solves piezoelectric stack in the case where working long hours due to sending out offset deviation thermogenetic
And the problems such as non-linear, while lubricating action is played, transmission effect is improved, the service life of device is extended.Valve body
12 left ends are equipped with the oil return hole 121 communicated with oil return opening (T mouthfuls) and communicate with the seal chamber, and are located at the top of the switch valve
Position.Plug 16 is close to 15 both ends of valve pocket with left plug ring 17, and right cover plate 13 is close to valve body 12 and plug 16.Implement in the present invention
In example, the spiral servo mechanism mainly can be by high pressure through-hole 141, low pressure counterbore 142, oblique waist through hole 151 and sensitive cavity 152
It is formed.
There is external splines 145 in 14 left end of spool, offers a high pressure through-hole 141 on 14 right end shoulder of spool, and pass through valve
Core inner channel 1 is communicated with system pressure mouth (P mouthfuls).A pair of of low pressure counterbore 142 is offered simultaneously on the spool right end shoulder
Communicated by valve core inside channel 2 143 with oil return opening (T mouthfuls), this it is not connected to low pressure counterbore 142 and with high pressure through-hole 141
Locate same circumferential position.
Offer oblique waist through hole 151 on valve pocket 15, valve pocket 15 experiences channel in offering on oblique waist through hole 151, should
Experience channel to communicate with the right end sensitive cavity 152 of spool, intersects and can obtain with above-mentioned high-low pressure hole in the work of oblique waist through hole 151
Two arcuate apertures, when piezo-electric type 2D electro hydraulic on-off valve is when valve core opening is zero, oblique waist through hole 151 and spool land high-low pressure
Hole intersection two arcuate apertures area equations of gained.
In an embodiment of the invention, the number of high pressure through-hole 141 and low pressure counterbore hole 142 on the spool is 360 ° circumferential
Amount can increase, but the two quantity must be equal and be spaced apart.When processing conditions meets, increase pressure hole 141 and low pressure
On the one hand the number in counterbore hole 142 can improve speed gain when spool 14 rotates, finally make the dynamic response of spool faster,
On the other hand it can increase the control remaining of this pilot stage, in the case where some or certain some above-mentioned high pressure hole plugs, also
There are other pressure holes that can work.The two quantity must be equal and be spaced apart, and is to guarantee spool 14 in radial force
Balance, and process easier.
Preferably, the actuation part includes actuating element and regulating device, the transfer part include spool clamping device with
Resetting apparatus.In one embodiment, the spool clamping device be select one or more locking coupling blocks, resetting apparatus be compared with
Good selection reset spring.In other embodiments, the construction of spool clamping device and resetting apparatus may change.
In one embodiment, the actuation part further includes actuating element and fills with the adjusting of actuating element coupling
It sets, the transfer part may also include rotatable valve pocket and above-mentioned resetting apparatus.As previously mentioned, be in some embodiments using
Piezoelectric actuator is as the actuating element.
As shown in Fig. 3 and Fig. 5, each piezoelectric actuator may include adjusting stud 31 and piezoelectric stack 32, each piezoelectric stack
32 can be identical cylindrical body, and be fixedly connected on and adjust on stud 31.Each adjusting stud 31 passes through screw thread and seal closure
The connection of 11 internal thread holes 112, each 32 one side of piezoelectric stack with each corresponding adjusting stud 31 is concentric is fixedly connected, and it is another
Face is in contact with corresponding 21 periphery of linear bearing, each initial bit for adjusting the adjustable corresponding piezoelectric stack 32 of stud 31
It sets.The projection of each adjusting stud 31 on the vertical plane is not overlapped.When the opening of spool 14 is zero, in each adjusting stud 31
Mandrel line intersects and vertical with the central axis of the corresponding linear bearing 21 contact.
In one embodiment, the transfer part includes for reducing the actuation part in the straight line deformation energy transmission mistake
The Cheng Zhongyu transfer part generates the support part of friction.In embodiments of the present invention, which is to select linear bearing 21.
The actuation part includes the pre-tightening apparatus for guaranteeing the straight line deformation energy transfer efficiency of the actuation part.Of the invention real
It applies in example, which is to select precompressed reset spring 24.
Such as Fig. 3, Fig. 5 as shown in fig. 6, specifically, transfer part includes lock linear bearing 21, holding screw 22, locking connection
Connect block 23 and reset spring 24.The position that locking coupling block 23 is contacted with each reset spring 24 is equipped with radius slightly larger than multiple
The circular counter bore 231 of position spring, plays position-limiting action, and the position that seal closure 11 is contacted with reset spring 24 is equipped with radius and is slightly less than again
The round boss 111 of position spring, plays position-limiting action.There is the interior flower in the same direction with 14 axial direction of spool in locking 23 middle of coupling block
Key 233, and it is provided with threaded hole 234 in the radial direction so that the two is connected.Locking coupling block 23 includes two centrosymmetric
Extension bar 232 has been respectively mounted identical linear bearing 21 thereon.Each reset spring 24 is about locking 23 central symmetry of coupling block
Arrangement, and one end is close to locking coupling block 23, seal closure 11 is close in other end, and each reset spring 24 is in the horizontal plane
Projection be not overlapped.14 left end external splines 145 of spool is fitted close mutually with locking coupling block internal spline 233, holding screw 22
It is matched with the threaded hole 234 of locking coupling block radial direction, and achievees the purpose that lock spool 14.
A kind of high speed for wet type piezo-electric type high-pressure high-flow two dimension switch valve is realized on the basis of the above embodiments
Driving method, comprising:
By electroluminescent or magnetostriction mode generate the spool axis body relative to the two-dimensional valve it is tangential on linear displacement
It moves；And
The straight line deformational displacement that the actuation part generates is passed into spool or the valve pocket of the two-dimensional valve to drive the spool
Or valve pocket rotates, while the torque arm length by changing the actuation part tangential forces, to generate different turn positions
Amplification effect is moved, and then passes through the axially open of the spiral servo mechanism controls spool.
In the high-speed driving method of the switch valve, as shown in fig 8-a, the opening of initial state spool 14 is zero, kidney-shaped
Through-hole 151 intersects two arcuate apertures area equations of gained with spool land high-low pressure hole, and 152 pressure of sensitive cavity is system pressure
Half P/2, and it is S that 152 inner fluid of sensitive cavity, which acts on the effective area of spool 14, while left end oil pocket pressure is system pressure
Power P, and acting on spool step surface effective area is S/2, spool 14 is in equilibrium state at this time.
When piezoelectric actuator is powered, as shown in Fig. 8-b, two pairs of piezoelectric stacks 32 extend Δ Xy, push corresponding linear axis
When holding 21, drives locking coupling block 23 to rotate Δ θ, and rotate with movable valve plug 14, cause oblique waist through hole 151 logical with high pressure respectively
The intersecting area of hole 141 and low pressure counterbore 142 changes.
As shown in Fig. 8-c, 152 pressure of sensitive cavity changes, and 14 or so pressure imbalance of spool is then axially moved Δ
Xm, because of the tiltedly presence of 151 helix angle α of waist through hole, during being axially moved with spool 14, oblique waist through hole 151
Identical again as the intersecting area of high pressure through-hole 141 and low pressure counterbore 142 respectively, 152 pressure recovery of sensitive cavity is P/2, valve
14 axially loaded of core reaches balance again, so that reaching control inputs to the voltage signal of piezo-electric stack 32 to control final spool
14 openings of sizes completes electrichydraulic control.
Compared with other electro hydraulic on-off valves, two dimension (2D) electro hydraulic on-off valve in the present invention is passed using piezoelectric actuator driving
It passs portion and is rotated with movable valve plug 14, so that the straight-line displacement of piezoelectric stack 32 to be become to the rotary motion of spool 14, and combine 2D
The principle of valve realizes the amplification of 14 axial displacement of spool, and the spiral liter of eccentricity or oblique waist through hole 151 when change force couple role
Angle can easily realize the change of amplification factor.
In the method, the amplification relationship that above-mentioned spool generates the deformational displacement of turn is extracted, as shown in figure 9, the valve
The displacement equations multiple of core calculates as follows: as default e=0.5mm, α=3.12 °, inputting Δ Xy=9.6um substitutes into formula
(1) θ=1 ° is obtained, formula (3) is substituted into and obtains amplification factor K ≈ 208, is i.e. the micron order output of piezoelectric stack is of the invention by above-mentioned implementation
After the switch valve amplification of the high-speed driving device of two-dimensional valve, spool displacement amplifies about 208 times, reaches the opening of 2mm.
Wherein
Amplification factor can be obtained by above-mentioned formula (3)
In above formula:
O-spool axle center,
The initial extension bar axle center A-,
The final extension bar axle center A '-,
D-piezoelectric stack and linear axis accept initial contact,
D '-piezoelectric stack and linear axis accept final contact,
It is helped supplemented by remaining letter a little,
ΔXy- piezoelectric stack stroke,
ΔXm- spool axial displacement,
r1- extension bar axle center and spool axle center distance,
r2- spool radius,
The tangential right angle side length of the oblique waist through hole of b-,
The oblique waist through hole helix angle of α-,
β-null angle,
Δ θ-spool corner,
E-eccentricity,
K-displacement equations multiple.
As shown in Figure 10 to Figure 14, a kind of electro-hydraulic ratio of two dimension for implementing the above-mentioned high-speed driving device towards two-dimensional valve is provided
Example decompression comprising pressure reducing valve, connecting plate and piezoelectricity control mechanism.It specifically, should as shown in Figure 10, Figure 11, Figure 12 and Figure 14
Pressure reducing valve includes including end cap 26, valve body 1, spool 7, resetting-mechanism and shaft end seal cover board 14；Resetting-mechanism includes adjusting pad
Piece 8, compression spring 15 and spring base 9；Adjustment gasket 8 and spring base 9 are in spool 7 with spool 7 and link block cooperation respectively
Positive open state；Two identical piezoelectric actuators and couple transmission mechanism in piezoelectricity control mechanism are installed on seal closure 3
It is interior.7 left end of spool is experienced by 1 left end rectangle of valve body forms sensitive cavity between channel 16 and end cap 26；On 7 left end shoulder of spool
Offer two pairs of high-low pressure holes；7 piston section of spool, 24 right side opening is equipped with a pair of of high pressure through-hole 25；Height on 7 left end shoulder of spool
Pressure hole is connected by 7 inner passage of spool with 7 piston section of spool, 24 right side high pressure through-hole 25,1 right side of high pressure through-hole 25 and valve body
P mouthfuls of high-pressure mouth communicate；Low pressure hole 23 on 7 left end shoulder of spool is communicated with 1 left side oil return inlet T mouth of valve body；7 rotation process of spool
Middle rectangle, which experiences channel 16, to intersect with the high-low pressure hole；The electro-hydraulic electro-hydraulic proportional reducing valve spool 7 of half-bridge piezo-electric type 2D is just opened
When mouth, rectangle experiences channel 16 and intersects gained area equation with the 7 shoulder high-low pressure hole of spool respectively.
As shown in Figure 11 and Figure 13, each piezoelectric actuator includes adjusting stud 13 and piezoelectric stack 27, each pressure
It is identical cylindrical body that electricity, which stacks 27, and is fixedly connected on and adjusts on stud 13.Each adjusting stud 13 by screw thread with it is close
The connection of 3 internal thread hole of sealing cover, each 27 one side of piezoelectric stack with each corresponding adjusting stud 13 is concentric is fixedly connected, and it is another
Face is in contact with corresponding 11 periphery of linear bearing, each initial bit for adjusting the adjustable corresponding piezoelectric stack 27 of stud 13
It sets.The projection of each adjusting stud 13 on the vertical plane is not overlapped.When just opening is spool 7, in each adjusting stud 13
Mandrel line intersects and vertical with the central axis of the corresponding linear bearing 11 contact.
There is axis hole in locking 10 middle of coupling block, and locks 10 axis hole of coupling block and be provided with tapped through hole 21 in the radial direction；
Locking coupling block 10 includes two centrosymmetric cylinders；It locks and has been respectively mounted identical straight line on two cylinders of coupling block 10
Bearing 11；Each reset spring 12 is centrosymmetrically arranged with each piezoelectric stack 27 about locking coupling block 10；Locking
The position that coupling block 10 is contacted with each reset spring 12 is equipped with the circular counter bore that radius is slightly larger than reset spring 12；Sealing
Cover 3 and another end in contact of reset spring 12；The projection of each reset spring 12 in the horizontal plane is not overlapped；7 right end of spool and institute
Locking 10 axis hole of coupling block is stated to be fitted close mutually；Holding screw and locking 10 axis hole radial direction tapped through hole 21 of coupling block match
It closes, and achievees the purpose that lock spool 7.
The working principle of two-dimentional (2D) electro-hydraulic proportional reducing valve of the semibridge system piezo-electric type is as follows: at initial state spool 7
In positive opening, rectangle experiences channel 16 and intersects two area equations of gained with 7 shoulder high-low pressure hole of spool, and sensitive cavity pressure is to be
The half for pressure of uniting, and it is S that sensitive cavity inner fluid, which acts on the effective area of spool 7, while rightmost side oil pocket pressure is system
Pressure, and acting on 7 step surface effective area of spool is S/2, spool 7 is in running order at this time.When piezoelectric actuator is powered
When, two pairs of piezoelectric stacks 27 extend, and when pushing corresponding linear bearing 11, drive locking coupling block 10 to rotate counterclockwise, and drive
Spool 7 rotates, and causes rectangle to experience intersecting area of the channel 16 respectively with high pressure through-hole 25 and low pressure hole 23 and changes, rectangle
Experience channel 16 to become larger with 25 intersecting area of high pressure through-hole, rectangle experiences channel 16 and becomes smaller with 23 intersecting area of low pressure hole, sensitive
Cavity pressure becomes larger, and 7 left pressure of spool becomes larger and moves right, and 7 opening area of spool reduces, system pressure effect of easing stress
It is gradually obvious.Spool 7, which moves right, is gradually increased the generation elastic force of compression spring 15, when 7 left and right ends power of spool is equal, spool
7 reach balance again, thus reach control input to piezo-electric stack 27 voltage signal it is big come the opening for controlling final spool 7
It is small, complete electrichydraulic control.Compared with other electro-hydraulic pressure reducing valves, the electro-hydraulic pressure reducing valve of two dimension in the present invention is driven using piezoelectric actuator
Power idol transmission mechanism is simultaneously rotated with movable valve plug 7, so that the straight-line displacement of piezoelectric stack 27 is become to the rotary motion of spool 7,
And the principle of two-dimentional (2D) valve is combined to realize the amplification of 7 axial displacement of spool.
As shown in Figure 15 to Figure 20, a kind of a kind of wet type letter for implementing the above-mentioned high-speed driving device towards two-dimensional valve is provided
Change the electro-hydraulic high speed reversal valve of full-bridge piezo-electric type 2D comprising reversing valve body, piezoelectric actuator actuating element and mechanical coupling
Couple transmission mechanism between the reversing valve body and actuating element.In embodiments of the present invention, the actuating element and couple
Transmission mechanism is arranged in the main structure of the reversing valve body.
Specifically, as shown in Figure 15, Figure 16, Figure 17 and Figure 20, the shape of reversal valve can be by end cap 1, valve body 2,3 phase of valve pocket
Mutual assembly is limited.Sometimes, actuating element can also be separably arranged with the reversing valve body.It is offered on end cap 1
Be large enough to hold and install actuating element (for example, piezoelectric actuator, thermocouple) and couple transmission mechanism) cavity.Implement at one
In example, end cap 1 is close to valve body 2 and plug 5 and forms seal chamber 6,5 two sides of plug be close to respectively valve pocket 3 and with end cap 1, on end cap 1
Drainage trough 7 is offered with the contact surface of valve body 2, which be connected with seal chamber 6, and threaded hole 8 is provided on end cap 1, is used for
The stud 10 that tightens with the adjusting stud 9 of actuating element and couple transmission mechanism couples respectively.
In one embodiment, valve body 2 is equipped with the long damping hole 11 being connected with oil back chamber 27, by oil return opening (T mouthfuls)
Oil liquid introduces seal chamber 6 through drainage trough 7 and forms wet type environment.The shoulder and plug 5 at 4 both ends of spool form sensitive cavity 12, spool 4
High pressure through-hole 13 is offered on the shoulder of left and right ends, 4 shaft core position of spool has axial channel 14 to be connected to both ends high pressure through-hole 13, valve
It covering 3 both ends central symmetry positions and offers oblique waist type hole 15,3 surface of valve pocket offers at oblique waist type hole 15 experiences channel 16,
Experience channel 16 to communicate with 4 both ends sensitive cavity 12 of spool.There is external splines 17 at 4 both ends of spool, and 4 medium position of spool has pressure hole
18,4 axial channel 14 of spool is communicated by pressure hole 18 with system pressure mouth (P mouthfuls), and high pressure through-hole 13 is passed through by pressure hole 18
Axial channel 14 introduces high pressure oil, and oblique waist type hole 15 can intersect with high pressure through-hole 13 in 4 rotation process of spool, and the left and right sides is sensitive
It is passed through high-voltage oil liquid in chamber 12 and forms simplified bridge type hydraulic oil circuit.Wet type simplifies the valve of the electro-hydraulic high speed reversal valve of full-bridge piezo-electric type 2D
When the opening of core 4 is zero, 4 two sides shoulder high pressure through-hole 13 of spool intersects gained area equation with corresponding 15 bevel edge of oblique waist type hole.
As shown in Fig. 2, Fig. 4 and Fig. 5, each piezoelectric actuator includes adjusting stud 9 and piezoelectric stack 19, couple transmitting
Mechanism includes contact steel ball 20, locking coupling block 21, reset spring 22 and tightens stud 10.Each piezoelectric stack 19 is phase
Same cylinder, one end connects with one heart to be connected with adjusting stud 9, and the other end cuts out semicircle step along axis direction.Each tune
Section stud 9 is even connect with end cap 1 by screw thread pair；Piezoelectric stack 19 is contacted with step the center point and contact 20 surface of steel ball.
When piezoelectric stack 19 pushes corresponding contact steel ball 20, two groups of contrary couples can be generated, to avoid two groups of pressures
Electricity stacks 19 and interferes, and step notch is transported towards spool 4 is axial when rotating with itself driving spool 4 when piezoelectric stack 19 is installed
Dynamic is contrary, avoids piezoelectric stack 19 micron-sized dry with corresponding contact steel ball 20 by axial millimetre-sized displacement
It relates to.
Couple transmission mechanism includes contact steel ball 20, locking coupling block 21, reset spring 22 and tightens stud 10, couple
Transmission mechanism is mounted in left and right end cap 1.Locking coupling block 21 is horizontal and vertical direction arranged off-centre have two groups it is centrosymmetric
Cylinder 25, the projection of every group of adjusting stud 9 on the vertical plane are not overlapped.There is installation to contact on the locking each cylinder 25 of coupling block 21
The spherical groove of steel ball 20.It locks coupling block 21 and is equipped with two circular counter bores 26 and reset spring that radius is slightly larger than reset spring 22
22 connections, two circular counter bores, 26 axle center are overlapped.The reset spring 22 of couple transmission mechanism is arranged vertically in two end cap 1.
There is internal spline 23 in locking 21 middle of coupling block, and internal spline 23 is provided with tapped through hole 24 in the radial direction.Spool 4
Both ends external splines 17 and 21 internal spline 23 of locking coupling block are fitted close mutually, and mounting screw joins locking in tapped through hole 24
It connects block 21 and spool 4 is fixed.
The working principle that wet type simplifies the electro-hydraulic high speed reversal valve of full-bridge piezo-electric type 2D is as follows: the opening of initial state spool 4 is
Zero, oblique waist type hole 15 intersects two arcuate apertures area equations of gained, 12 pressure of two sides sensitive cavity with 4 shoulder high pressure through-hole 13 of spool
For system pressure P, spool 4 is in equilibrium state at this time.
When piezoelectric actuator is powered, two pairs of piezoelectric stacks 19 extend under inverse piezoelectric effect, push corresponding contact steel
Ball 20, drive locking coupling block 21 rotate, locking coupling block 21 with movable valve plug 4 rotate, cause two sides oblique waist type hole 15 respectively with
The intersecting area of high pressure through-hole 13 changes, and sensitive cavity 12 pressure in two sides changes, and 4 or so pressure imbalance of spool is then
Axial movement is generated, because of the presence of right-angled trapezium bevel edge, during being axially moved with spool 4, oblique waist type hole 15 is distinguished
Identical again as the intersecting area of two sides high pressure through-hole 13, sensitive cavity 12 pressure recovery in two sides is P, and spool 4 reaches flat again
Weighing apparatus completes electrichydraulic control so that reaching control inputs to the voltage signal of piezo-electric stack to control the opening of final spool 4.
Compared with other electro hydraulic on-off valves, the 2D electro-hydraulic reversing valve valve in the present invention is passed using piezoelectric actuator driving couple
It passs mechanism and is rotated with movable valve plug 4, so that the straight-line displacement of piezoelectric stack 19 to be become to the rotary motion of spool 4, and combine 2D
The principle of valve realizes the amplification of 4 axial displacement of spool, and when changing force couple role the bevel edge of eccentricity or oblique waist type hole 15 inclination
Angle can easily realize the change of amplification factor.
In one embodiment, the helix angle of the oblique waist type hole (15) is 1 °~3 °.
In one embodiment, the length of the piezoelectric stack (19) is 15mm~25mm, and output displacement is 0 μm~25 μ
m。
In one embodiment, locking coupling block (21) level and centrosymmetric circle in vertical direction arranged off-centre
Column (25) eccentric distance is 0.2mm~0.5mm.
As shown in Figure 21 to Figure 23, a kind of semibridge system piezoelectricity for implementing the above-mentioned high-speed driving device towards two-dimensional valve is provided
Type two dimension screw-in cartridge valve comprising thread cartridge valve body, piezoelectric actuated portion and transfer part.
Specifically, such screw-in cartridge valve shown in Figure 21 mainly includes cover board 1, piezoelectric stack 2, integral type bellows connection
Axis device 3, annulus set 4, screw plug 5, inserting valve body 6, two-dimentional spool 7, pin 8 and sealing element etc..Piezoelectric actuated portion's packet
Piezoelectric stack 2 and integral type bellows coupling 3 are included, the transfer part includes integral type bellows coupling 3 and pin 8.The spiral shell
Cooperate between stifled 5 and spool 7 for concentric gap, O-shaped close carry out seal be set therebetween, and due to spool 7 inside
High pressure runner b, so that forming the left high pressure chest e of Heng Tong high pressure between the left side step a on the screw plug 5 and spool 7；It is high simultaneously
Pressure runner b is connect with the high pressure through-hole 701 being set on 7 right sections of step c of spool；6 inner wall of valve body is corresponded in the high pressure through-hole
It is equipped with parallelogram slot 601 out, which is connected with right sensitive cavity d, while the parallelogram slot 601
Also it is connected with T mouthfuls, three forms one and leads control grade sensitivity oil pocket d, and the pressure of sensitivity oil pocket d is by above-mentioned triangular dynamic fluid flow
Resistance determines；
As shown in Figure 22 and Figure 23, driven in the present embodiment using about circumferential symmetrical a pair of of the piezoelectric stack 2 of poppet shaft,
The projection of the piezoelectric stack 2 in the horizontal plane is not exclusively overlapped；The piezoelectric stack 2 is Nian Jie with silicon steel sheet 10, to protect piezoelectricity
Stack will not be due to being caused to damage by stress concentration；The integral type bellows 2 passes through bellows section h and spool pin joint；Institute
Stating integral type bellows includes the retainer g for holding piezoelectric stack 2 tightly and the Spring beams f for being set to center；The Spring beams f
It is circumferentially symmetrically arranged with a pair of of circular groove about poppet shaft, for being packed into cylindrical roller 11, the piezoelectric stack 2 can be reduced and worked
When and the Spring beams f of integral type bellows 3 between the radial friction that generates；When the piezoelectric stack is packed into retainer g, bullet
Property crossbeam f be in pretwist state, with have the function that piezoelectric stack pre-tighten, guarantee that the straight line deformational displacement of the actuation part is effective
It is transferred to the transfer part, in other embodiments, pre-tightening apparatus and the construction for reducing rubbing device may change.
The working principle of the screw-in cartridge valve is as follows: the parallelogram slot 601 intersects with large mouse high pressure through-hole 701
Small arch hole area, and 601 right side of parallelogram slot described in 7 motion process of spool is quick with the pressure always
Feel chamber d intersection, 601 right side of parallelogram slot intersects with oil return opening always, forms two small opening areas, constitute
Flowed friction half-bridge, the sensitive cavity d's is pressure controlled in the flowed friction half-bridge；The sensitive cavity d and low pressure oil pocket
Damping is determined by the parallelogram slot sectional area in the radial direction during the motion, which is invariant, therefore
Only need to analyze orifice size size you can get it the sensitive cavity d pressure size of the arcuate apertures；When balance, due to oil liquid pressure
The right side area of the step c of effect is one times of area on the left of step a, and the pressure of the shown quick d of pressure is system pressure
Half, i.e. P/2, spool land a, c or so stress balance, spool are in equilibrium state at this time.
When actuation, the piezoelectric stack obtains voltage output displacement, acts on the cylindrical roller 11 of arranged off-centre, and generation makes it
Rotation angle is passed to spool by the part bellows h by the couple rotated counterclockwise, and the high pressure on spool step c is logical
The counterclockwise movement therewith of hole 701, above-mentioned arch hole area increase, and presser sensor chamber d pressure reduces, spool land a, c or so by
Power is uneven, pushes spool to move downward, during moving downward, the arch hole area is gradually reduced, the sensitive cavity d
Pressure is gone up, until 7 or so stress of spool is again equal, spool stop motion, it is Δ X that spool displacement, which is open, completes spiral
Position servo control process, completes electrichydraulic control, and the angle of Spool rotating determines that the size of valve core opening, the two are one a pair of
It should be related to, reset when only needs piezoelectric stack power loss, and above-mentioned Spring beams f passes through bellows h immediately and spool angle is gone back to original
Position, axial return principle are same as above.By the setting of the bellows h so that rotation angle is able to pass to spool 7, but the valve
When core 7 is axially moved, bellows h axial tension, will not 2 part of piezoelectric stack to driving portion have an impact, reduce
The friction that the actuation part generates in the straight line deformational displacement transmittance process with the transfer part.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (4)
1. a kind of high-speed driving device for two-dimensional valve, characterized by comprising:
Actuation part, for generating the linear in the spool axis body tangential direction relative to the two-dimensional valve by electrostriction mode
Variable displacement；And
The transfer part for connecting the actuation part, the straight line deformational displacement for generating the actuation part pass to the valve of the two-dimensional valve
Core or valve pocket are to drive the spool or valve pocket to rotate, while the arm of force by changing the actuation part tangential forces is long
Degree to generate different turn displacement equations effects, and then passes through the axially open of the spiral servo mechanism controls spool.
2. high-speed driving device according to claim 1, it is characterised in that: the actuation part further includes for preventing the cause
Dynamic portion is when driving the spool or valve pocket to do two-way turn, the step that interferes between spool axis body.
3. high-speed driving device according to claim 1 or 2, it is characterised in that: the transfer part includes for reducing
State the support part that actuation part generates friction in the straight line deformational displacement transmittance process with the transfer part.
4. high-speed driving device according to claim 1 or 2, it is characterised in that: the actuation part includes for guaranteeing this
The straight line deformational displacement of actuation part is effectively transferred to the pre-tightening apparatus of the transfer part.
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| CN110219846B (en) | 2020-06-02 |
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