CN102619801B - Pure-water bidirectional opposed piezoelectric ceramic reversing valve - Google Patents
Pure-water bidirectional opposed piezoelectric ceramic reversing valve Download PDFInfo
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- CN102619801B CN102619801B CN201210103151.0A CN201210103151A CN102619801B CN 102619801 B CN102619801 B CN 102619801B CN 201210103151 A CN201210103151 A CN 201210103151A CN 102619801 B CN102619801 B CN 102619801B
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- 230000002457 bidirectional effect Effects 0.000 title abstract 4
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- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a pure-water bidirectional opposed piezoelectric ceramic reversing valve, which comprises mechanisms of two opposed piezoelectric ceramic actuators, a spherical spool disposed in an inner hole of a valve body, a return spring, a spring pushrod and the like. A water inlet, a working opening and a water-returning opening are arranged at the upper end of the valve body and are communicated with each other. On or off of a loop is formed by disconnection or connection between a ceramic ball and a valve seat to change liquid-flowing direction so as to reverse a liquid path as needed. By the pure-water bidirectional opposed piezoelectric ceramic reversing valve, zero-leakage can be achieved by direct sealing between the spool and a valve sleeve and between the valve sleeve and the valve body and by linear sealing between the ceramic spherical spool and the valve seat. By the aid of a valve port damper arranged additionally, static and dynamic performance of the reversing valve can be improved. By the piezoelectric ceramic actuators with high output power, rapid switch can be realized. The pure-water bidirectional opposed piezoelectric ceramic reversing valve has the advantages of good generality and convenience in standardization, and is particularly suitable for working in the aqueous medium environment with low flow, high response and strong electromagnetic field effect.
Description
Technical field
The present invention relates to valve class, relate in particular to the two-way opposed piezoelectric constant selector valve of a kind of pure water.
Background technique
Pure Water Hydraulic Drive Technology, because of its unique advantage with the feature of environmental protection and flame retarding, be just subject to the extensive attention of countries in the world hydraulic pressure circle, and water hydraulic components also becomes one of key content of research.Selector valve is one of the most key valve element of hydraulic system, also becomes research emphasis for the research of the selector valve that is applicable to pure water hydraulics system.
Traditional oil pressure selector valve mostly is slide valve type, rotary valve type or cone valve type.The suffered unbalanced force of slide valve type and rotary valve type change-over valve core is very little, and needed steering force is also less, but between spool and valve opening, needs to ensure the gap of relative movement, leaks often larger.Especially for aqueous medium, the viscosity of water is low can increase leakage loss, and when identical with pressure reduction in gap, the leakage loss of the hydraulic pressure selector valve of same specification is the decades of times of oil pressure selector valve.Thereby, for just reduce to leak must be gap design very little, this must bring very big difficulty to processing, very easily occurs obstruction, stuck phenomenon when kinematic pair work simultaneously.The leakage of cone valve type selector valve is very little, but the axial hydraulic force unbalance that spool is subject to, required steering force is also larger.In addition, because the compressibility of water is little, rigidity is large, the compression shock producing in the time that pure water selector valve switches is suddenly even more serious.
In addition, the pressure for vaporization of water is high, make easily vaporization and boiling of water electrode, thereby under the same conditions, the cavitation erosion degree that pure water selector valve suffers is than the strong hundreds of times of oil pressure selector valve; Compared with mineral oil, water corrosion is very strong, and the destruction of corrosive action makes existing oil pressure selector valve material all not be suitable for aqueous medium.
Therefore, how Leakage prevention, reduce reversing impact, reduce corrosion and effectively suppress cavitation erosion, improve quiet dynamic characteristic, become the key point of pure water selector valve research.
The main research mode of pure water selector valve is mainly following two kinds at present:
The first is to adopt cone valve type structure.Such valve forms by being arranged on symmetrically two groups of main coning valves on valve body, two pilot-actuated valves that are designed to end cap flange and two unidirectional controlled cone valves.Such valve conveyance capacity is strong, cavitation resistive property good.But it is subject to the impact of machining accuracy, cannot overcome axial unbalanced pressure completely, needed steering force is also larger.
The second is to adopt slide-valve structure.Such valve leaks for reducing, and what the matching gap between spool and valve pocket was designed is very little, and so little gap has proposed very harsh requirement to the processing technology of valve, has improved greatly difficulty of processing and processing cost.In addition, so little gap is also easily by impurity jam, and therefore its application is greatly limited.
But, existing water hydraulic element is to adopt Electromagnetic Drive mostly, need in the course of the work to expend a large amount of maintenance electric currents, if employing has, electric energy-mechanical energy conversion efficiency is high, Energy Transfer density large, the piezoelectric ceramic actuator of fast response time, not only can reduce water hydraulic element cost, and can save maintenance electric current, greatly save energy consumption, and improve the slow deficiency of traditional electrical magnetic driven device speed of response; And existing Electromagnetic Drive is subject to the interference of external electromagnetic field more obvious, but piezoelectric ceramic actuator is not subject to the interference of external electromagnetic field in the course of the work, thereby can improve the deficiency of existing Electromagnetic Drive aspect electromagnetism anti-interference.
Japan scientific research personnel has developed the single-stage direct-acting servovalve directly driving with lamination type piezoelectric actuator.This valve core directly drives by lamination type piezoelectric actuator, spool is with Displacement Feedback, realize closed loop control, but this piezoelectric actuator output displacement is very little, can only control minimum flow, and the intrinsic hesitation of piezoelectric material is larger, and Repeatability is poor, has limited application and the development of piezoelectricity servovalve.
Summary of the invention
The object of the present invention is to provide the two-way opposed piezoelectric constant selector valve of a kind of pure water, the switching of flowing back to road for controlling liquid, realize without leaking, alleviate the phenomenons such as cavitation erosion, corrosion simultaneously, improve speed of response, improve electromagnetism anti-interference and reduce power consumption, be applicable under aqueous medium environment that small flow, high response, electromagnetic field effect are stronger.
The technical solution adopted for the present invention to solve the technical problems is:
The two-way opposed piezoelectric constant selector valve of pure water, comprises outer fixing valve pocket, valve body and hold-doun nut, and outer fixing valve pocket comprises, is separately fixed at outer fixing valve pocket I and the outer fixing valve pocket II at two ends, the axial left and right of valve body; Hold-doun nut comprises, is fixed on the nut I and the nut II that is fixed on outer fixing valve pocket II right-hand member of the axial left end of outer fixing valve pocket I; Valve body inner axes is provided with through hole, and the spring valve pocket that radially has two ports valve covers of one group of through hole, the six ports valve covers that radially have one group of inclined hole, step post I, the octal valve pocket that radially has one group of through hole, step post II and radially have two groups of inclined holes is installed successively from left to right in through hole, and between two ports valve covers, six ports valve covers, step post I, octal valve pocket, step post II and the each parts of spring valve pocket mutually near; Form in cavity and be provided with spring push-rod I in two ports valve covers, six ports valve covers and step post I; Octal valve pocket center is provided with ceramic ball; One end of spring push-rod I withstands in the ceramic ball being contained in octal valve pocket; Step post II and spring valve pocket form in cavity and are provided with spring push-rod II, and spring push-rod II one end withstands in ceramic ball; Two ports valve cover left end inwalls are provided with annular projection; In two ports valve covers, be provided with U-shaped sealing framework I, and U-shaped sealing framework I is arranged at two right sides, valve sleeving inner wall annular projection place, hole; Between U-shaped sealing framework I and spring push-rod I left end shoulder face, be provided with Returnning spring I; Spring valve pocket right-hand member inwall is provided with annular projection, and annular projection place left end is provided with U-shaped sealing framework II; Between the spring push-rod II right-hand member shoulder face in spring valve pocket and U-shaped sealing framework II, be provided with Returnning spring II; Spring push-rod I left end stretches out in two ports valve covers; Spring push-rod II right-hand member stretches out in spring valve pocket; Outer fixing valve pocket I left end is connected and fixed by screw thread and nut I; In outer fixing valve pocket I, be disposed with from left to right interior fixed cover I, piezoelectric ceramic actuator I and push rod I, and interior fixed cover I, piezoelectric ceramic actuator I and push rod I mutually near; Push rod I right-hand member and spring push-rod I stretch out in two ports valves cover parts near; Outer fixing valve pocket I is connected and fixed by bolt and valve body; Outer fixing valve pocket II right-hand member is connected and fixed by screw thread and nut II; In outer fixing valve pocket II, right-to-left is disposed with interior fixed cover II, piezoelectric ceramic actuator II and push rod II, and interior fixed cover II, piezoelectric ceramic actuator II and push rod II mutually near; Push rod II left end and spring push-rod II stretch out in spring valve pocket part near; Outer fixing valve pocket II is connected and fixed by bolt and valve body; Nut I left side is provided with axial micrometer adjusting screw I, and axially micrometer adjusting screw I end withstands on interior fixed cover I left side; Nut II right side is provided with axial micrometer adjusting screw II, and axially micrometer adjusting screw II end withstands on interior fixed cover II right side; Valve body top has water intake, working hole and backwater mouth, and is provided with valve port damper in water intake, working hole and backwater mouth; Valve body lower portion has the runner that is communicated with two ends, valve body left and right; In interior fixed cover I and nut I, be provided with the through hole stretching out for piezoelectric ceramic actuator I power line; In interior fixed cover II and nut II, be provided with the through hole stretching out for piezoelectric ceramic actuator II power line;
When piezoelectric ceramic actuator II dead electricity, piezoelectric ceramic actuator I obtains when electric, piezoelectric ceramic actuator I promotes push rod I and spring push-rod I moves right, ceramic ball separates with step post I, ceramic ball engages with step post II, liquid flows the inclined hole putting by the through hole on working hole, octal valve pocket, step post I center hole, six ports valves, enters backwater mouth, and on valve body, working hole and backwater mouth can be through-flow;
When piezoelectric ceramic actuator I dead electricity, piezoelectric ceramic actuator II obtains when electric, piezoelectric ceramic actuator II promotion push rod II and spring push-rod II are to left movement, ceramic ball separates with step post II, ceramic ball engages with step post I, liquid stream puts the through hole on the inclined hole, step post II center hole, octal valve pocket of left end by water intake, spring valve, enter working hole, and valve inleting water mouth and working hole can be through-flow;
In valve working procedure, there is part liquid to flow to into Returnning spring II place cavity, the through hole that part liquid stream puts through valve flowing channel, two ports valves enters Returnning spring I place cavity, makes spring push-rod II, spring push-rod I and the suffered fluid pressure balance of ceramic ball; After the two-way opposed piezoelectric constant selector valve of pure water has been assembled, can regulate the position of interior fixed cover I by the precession of micrometer adjusting screw I, and then regulate the good contact of piezoelectric ceramic actuator I, push rod I and spring push-rod I; Can regulate the position of interior fixed cover II by the precession of micrometer adjusting screw II, and then regulate the good contact of piezoelectric ceramic actuator II, push rod II and spring push-rod II;
Between two ports valve covers and valve body, be provided with O-ring seals I, between six ports valve covers and valve body, add the sealing of back-up ring I by O-ring seals II, between step post I and valve body, add the sealing of back-up ring II by O-ring seals III, between step post II and valve body, add the sealing of back-up ring III by O-ring seals IV, between spring valve pocket and valve body, seal by O-ring seals V, between six ports valve covers and spring push-rod I, add the sealing of back-up ring IV by O-ring seals VI, between spring valve pocket and spring push-rod II, seal bone II by U-shaped and add the sealing of back-up ring V, U-shaped sealing framework I and two valve sleeving inner wall annular projection contacting points, hole are provided with back-up ring VI, valve body top has water intake, working hole and backwater mouth inwall and is respectively arranged with O-ring seals VI, O-ring seals VII and O-ring seals VIII, outer fixing valve pocket I and outer fixing valve pocket II minimum diameter are less than the minimum diameter of valve body, water intake and working hole can exchange, composition P-A, the valve of A-O function.
The present invention is compared with background technique, and the beneficial effect having is:
1, adopt the covering between ceramic ball spool and step post or leave and realize liquid circulation and break, can realize without leaking, owing to carrying out break-make switching by ceramic ball, the stroke of ceramic ball is exactly the opening amount of valve, thereby stroke is short, greatly shorten commutation and the resetting time of this selector valve, improved reaction velocity;
2, valve body and valve pocket, between valve pocket and spring push-rod, all use O-ring seals and the sealing of U-shaped sealing framework, efficiently solve pure water selector valve and leak serious problem, the reasonable Arrangement of runner makes spring push-rod and the suffered fluid pressure balance of ceramic ball, can ensure that the flexible movements of ball valve core are reliable;
3, be provided with valve port damper at water intake, working hole and the backwater mouth of valve body, by damping adjusting device, can control the speed of liquid stream, improved the dynamic and static state performance of this selector valve;
4, the drive part of this valve adopts piezoelectric ceramic actuator, because piezoelectric constant has higher voltage responsive frequency, thereby this valve is applicable to compared with in the operating mode of high responsiveness, in piezoelectric constant working procedure, only need one and keep voltage and be not subject to extraneous electromagnetic interference, thereby make this valve there is the characteristic that power consumption is little and anti-electromagnetic interference is strong;
5, this valve has simple in structure, easy for installation, good manufacturability, is easy to standardized feature, is suitable for producing in serial form;
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, and for above and other object of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In accompanying drawing: 1 outer fixing valve pocket, 1.1 outer fixing valve pocket I, 1.2 outer fixing valve pocket II, 1.3 interior fixed cover I, 1.4 piezoelectric ceramic actuator I, 1.5 push rod, 1.6 interior fixed cover II, 1.7 piezoelectric ceramic actuator II, 1.8 push rod II, 2 valve bodies, 2.1 2 ports valve covers, 2.2 6 ports valve covers, 2.3 step post I, 2.4 octal valve pockets, 2.5 step post II, 2.6 spring valve pockets, 2.7 spring push-rod I, 2.8 ceramic ball, 2.9 spring push-rod II, 2.10U shape sealing framework I, 2.11 Returnning spring I, 2.12U shape sealing framework II, 2.13 Returnning spring II, 2.14O shape seal ring I, 2.15O shape seal ring II, 2.16 back-up ring I, 2.17O shape seal ring III, 2.18 back-up ring II, 2.19O shape seal ring IV, 2.20 back-up ring III, 2.21O shape seal ring V, 2.22O shape seal ring VI, 2.23 back-up ring IV, 2.24 back-up ring V, 2.25 back-up ring VI, 2.26O shape seal ring VI, 2.27O shape seal ring VII, 2.28O shape seal ring VIII, 3 hold-doun nuts, 3.1 nut I, 3.2 nut II, 3.3 micrometer adjusting screw I, 3.4 micrometer adjusting screw II, G runner, P water intake, A working hole, O backwater mouth.
Embodiment
The two-way opposed piezoelectric constant selector valve of pure water of the present invention as shown in Figure 1, comprises outer fixing valve pocket 1, valve body 2 and hold-doun nut 3, outer fixing valve pocket 1 comprises, is separately fixed at outer fixing valve pocket I 1.1 and the outer fixing valve pocket II 1.2 at valve body 2 two ends, axial left and right, hold-doun nut 3 comprises, is fixed on the nut I 3.1 and the nut II 3.2 that is fixed on outer fixing valve pocket II 1.2 right-hand members of outer fixing valve pocket I 1.1 axial left ends, valve body 2 inner axes are provided with through hole, and in through hole, be provided with successively from left to right and radially have two ports valves covers 2.1 of one group of through hole, radially have six ports valves covers 2.2, step post I 2.3, the octal valve pocket 2.4 that radially has one group of through hole, the step post II 2.5 of one group of inclined hole and radially have the spring valve pocket 2.6 of two groups of inclined holes, and between two ports valves cover 2.1, six ports valves covers 2.2, step post I 2.3, octal valve pocket 2.4, step post II 2.5 and the each parts of spring valve pocket 2.6 mutually near, form and in cavity, be provided with spring push-rod I 2.7 in two ports valves covers 2.1, six ports valves covers 2.2 and step post I 2.3, octal valve pocket 2.4 centers are provided with ceramic ball 2.8, one end of spring push-rod I 2.7 withstands in the ceramic ball 2.8 being contained in octal valve pocket 2.4, step post II 2.5 and spring valve pocket 2.6 form and in cavity, are provided with spring push-rod II 2.9, and spring push-rod II 2.9 one end withstand in ceramic ball 2.8, two ports valves overlap 2.1 left end inwalls and are provided with annular projection, in two ports valves covers 2.1, be provided with U-shaped sealing framework I 2.10, and described U-shaped sealing framework I 2.10 is arranged at two ports valves and overlaps 2.1 right sides, inwall annular projection place, between U-shaped sealing framework I 2.10 and spring push-rod I 2.7 left end shoulder faces, be provided with Returnning spring I 2.11, spring valve pocket 2.6 right-hand member inwalls are provided with annular projection, and annular projection place left end is provided with U-shaped sealing framework II 2.12, between the spring push-rod II 2.9 right-hand member shoulder faces in spring valve pocket 2.6 and U-shaped sealing framework II 2.12, be provided with Returnning spring II 2.13, spring push-rod I 2.7 left ends stretch out in two ports valve covers 2.1, spring push-rod II 2.9 right-hand members stretch out in spring valve pocket 2.6, outer fixing valve pocket I 1.1 left ends are connected and fixed by screw thread and nut I 3.1, in outer fixing valve pocket I 1.1, be disposed with from left to right interior fixed cover I 1.3, piezoelectric ceramic actuator I 1.4 and push rod I 1.5, and interior fixed cover I 1.3, piezoelectric ceramic actuator I 1.4 and push rod I 1.5 mutually near, push rod I 1.5 right-hand members and spring push-rod I 2.7 stretch out in two ports valves overlap 2.1 parts near, outer fixing valve pocket I 1.1 is connected and fixed by bolt and valve body 2, outer fixing valve pocket II 1.2 right-hand members are connected and fixed by screw thread and nut II 3.2, the outer fixing interior right-to-left of valve pocket II 1.2 is disposed with interior fixed cover II 1.6, piezoelectric ceramic actuator II 1.7 and push rod II 1.8, and interior fixed cover II 1.6, piezoelectric ceramic actuator II 1.7 and push rod II 1.8 mutually near, push rod II 1.8 left ends and spring push-rod II 2.9 stretch out in spring valve pocket 2.6 parts near, outer fixing valve pocket II 1.2 is connected and fixed by bolt and valve body 2, nut I 3.1 left sides are provided with axial micrometer adjusting screw I 3.3, and axially micrometer adjusting screw I 3.3 ends withstand on interior fixed cover I 1.3 left sides, nut II 3.2 right sides are provided with axial micrometer adjusting screw II 3.4, and axially micrometer adjusting screw II 3.4 ends withstand on interior fixed cover II 1.6 right sides, valve body 2 tops have water intake P, working hole A and backwater mouth O, and in water intake P, are provided with valve port damper 2.13, valve body 2 bottoms have the runner G that is communicated with valve body 2 two ends, left and right, between two ports valve covers 2.1 and valve body 2, be provided with O-ring seals I 2.14, between six ports valve covers 2.2 and valve body 2, add back-up ring I 2.16 by O-ring seals II 2.15 and seal, O-ring seals II 2.15 adds back-up ring I 2.16 equally can be by two ports valve covers 2.1 and six ports valve cover 2.2 sealings, between step post I 2.3 and valve body 2, adding back-up ring II 2.18 by O-ring seals III 2.17 seals, between step post II 2.5 and valve body 2, adding back-up ring III 2.20 by O-ring seals IV 2.19 seals, between spring valve pocket 2.6 and valve body 2, seal by O-ring seals V 2.21, between six ports valve covers 2.2 and spring push-rod I 2.7, adding back-up ring IV 2.23 by O-ring seals VI 2.22 seals, between spring valve pocket 2.6 and spring push-rod II 2.9, adding back-up ring V 2.24 by U-shaped sealing framework II 2.12 seals, U-shaped sealing framework I 2.10 and two ports valves overlap 2.1 inwall annular projection contacting points and are provided with back-up ring VI 2.25, valve body 2 tops have water intake P, working hole A and backwater mouth O inwall is respectively arranged with O-ring seals VI 2.26, O-ring seals VII 2.27 and O-ring seals VIII 2.28, outer fixing valve pocket I 1.1 and outer fixing valve pocket II 1.2 minimum diameters are less than the minimum diameter of valve body 2, and then two ports valves cover 2.1 does end face and can withstand on outer fixing valve pocket I 1.1 right sides, and spring valve pocket 2.6 right sides can withstand on outer fixed cover II 1.2 left sides.
Adopt the two-way opposed piezoelectric constant selector valve of pure water of the present invention of said structure, when piezoelectric ceramic actuator II 1.7 dead electricity, piezoelectric ceramic actuator I 1.4 when electric, piezoelectric ceramic actuator I 1.4 produces deformation promotion push rod I 1.5 and spring push-rod I 2.7 moves right, and then spring push-rod I 2.7 promotes ceramic ball 2.8, make ceramic ball 2.8 separate with step post II 2.5 and engage with step post I 2.3, liquid stream is by working hole A, through hole on octal valve pocket 2.4, step post I 2.3 center holes, inclined hole on six ports valve covers 2.2, enter backwater mouth O, on valve body 2, working hole A and backwater mouth O can be through-flow, when piezoelectric ceramic actuator I 1.4 dead electricity, piezoelectric ceramic actuator II 1.7 when electric, piezoelectric ceramic actuator II 1.7 produces deformation and promotes push rod II 1.8 and spring push-rod II 2.9 to left movement, and then spring push-rod II 1.8 promotes ceramic ball 2.8, make ceramic ball 2.8 separate with step post I 2.3 and engage with step post II 2.5, liquid flows by the through hole on the inclined hole of left end on water intake P, spring valve pocket 2.6, step post II 2.5 center holes, octal valve pocket 2.4, enter working hole A, valve body 2 water intake P and working hole A can be through-flow,
In valve working procedure, there is part liquid to flow to into Returnning spring II 2.13 place cavitys, part liquid stream enters Returnning spring I 2.11 place cavitys through the through hole on valve flowing channel G, two ports valve covers 2.1, make spring push-rod II 2.9, spring push-rod I 2.7 and the suffered fluid pressure balance of ceramic ball 2.8, can ensure that like this ceramic ball 2.8 flexible movements are reliable, be applicable to mesohigh aqueous medium operating conditions; After the two-way opposed piezoelectric constant selector valve of pure water has been assembled, user can regulate the position of interior fixed cover I 1.1 by the precession of micrometer adjusting screw I 3.3, and then regulates the good contact of piezoelectric ceramic actuator I 1.4, push rod I 1.5 and spring push-rod I 2.7; Can regulate the position of interior fixed cover II 1.6 by the precession of micrometer adjusting screw II 3.4, and then regulate the good contact of piezoelectric ceramic actuator II 1.7, push rod II 1.8 and spring push-rod II 2.9;
Piezoelectric ceramic actuator has higher response frequency for voltage, the occasion that this selector valve is required in height response has good advantage, and piezoelectric ceramic actuator has good electromagnetism anti-interference, can be used in the environment that electromagnetic field is stronger, overcome solenoid directional control valve defect in this respect in the past, and piezoelectric ceramic actuator can not consume a large amount of maintenance electric currents, thereby compared with solenoid directional control valve, this selector valve has stronger advantage aspect low power consumption; Adopt the mode of piezoelectric ceramic actuator two-way opposed driving, one end piezoelectric ceramic actuator obtains the other end dead electricity simultaneously electric time, the synchronous collaboration while ensureing to drive; Adopt ceramic ball 2.8 to separate or joint with step post, realize opening or closing of loop, shortened movement travel, improved reaction velocity; Two kinds of structures cooperatively interact and have ensured the responsiveness that this selector valve is higher; In valve body 2 top water intake P, working hole A and backwater mouth O, be provided with valve port damper 2.13, improved the dynamic and static state performance of valve.
For adapting to the particular/special requirement of aqueous medium, all elements of valve all can adopt anti-corrosion non-corrosive material, can ensure that valve has the longer life-span in aqueous medium working environment.In addition, that this valve has is simple in structure, easy for installation, good manufacturability, be easy to standardized feature, makes it be suitable for producing in serial form.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, any those skilled in the art are not departing within the scope of technical solution of the present invention, appeal when utilizing the equivalent embodiment that the technology contents disclosing is made a little change or is modified to equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (3)
1. the two-way opposed piezoelectric constant selector valve of pure water, comprise outer fixing valve pocket (1), valve body (2) and hold-doun nut (3), it is characterized in that: described outer fixing valve pocket (1) comprises, is separately fixed at axially outer fixing valve pocket I (1.1) and the outer fixing valve pocket II (1.2) at two ends, left and right of valve body (2), described hold-doun nut (3) comprises, be fixed on outer fixing valve pocket I (1.1) axially left end nut I (3.1) and be fixed on the nut II (3.2) of outer fixing valve pocket II (1.2) right-hand member, described valve body (2) inner axes is provided with through hole, and the two ports valve covers (2.1) that radially have one group of through hole are installed in through hole from left to right successively, radially have six ports valve covers (2.2) of one group of inclined hole, step post I (2.3), radially have the octal valve pocket (2.4) of one group of through hole, step post II (2.5) and radially have the spring valve pocket (2.6) of two groups of inclined holes, and described two ports valve covers (2.1), six ports valve covers (2.2), step post I (2.3), octal valve pocket (2.4), between step post II (2.5) and the each parts of spring valve pocket (2.6) mutually near, in forming cavity, two ports valve covers (2.1), six ports valve covers (2.2) and step post I (2.3) be provided with spring push-rod I (2.7), described octal valve pocket (2.4) center is provided with ceramic ball (2.8), one end of described spring push-rod I (2.7) withstands in the ceramic ball (2.8) being contained in octal valve pocket (2.4), described step post II (2.5) forms in cavity and is provided with spring push-rod II (2.9) with spring valve pocket (2.6), and spring push-rod II (2.9) one end withstands in ceramic ball (2.8), described two ports valve cover (2.1) left end inwalls are provided with annular projection, in described two ports valve covers (2.1), be provided with U-shaped sealing framework I (2.10), and described U-shaped sealing framework I (2.10) is arranged at two right sides, ports valve cover (2.1) inwall annular projection place, between described U-shaped sealing framework I (2.10) and spring push-rod I (2.7) left end shoulder face, be provided with Returnning spring I (2.11), described spring valve pocket (2.6) right-hand member inwall is provided with annular projection, and annular projection place left end is provided with U-shaped sealing framework II (2.12), between spring push-rod II (2.9) the right-hand member shoulder face in described spring valve pocket (2.6) and U-shaped sealing framework II (2.12), be provided with Returnning spring II (2.13), described spring push-rod I (2.7) left end stretches out in two ports valve covers (2.1), described spring push-rod II (2.9) right-hand member stretches out in spring valve pocket (2.6), described outer fixing valve pocket I (1.1) left end is connected and fixed by screw thread and nut I (3.1), in described outer fixing valve pocket I (1.1), be disposed with from left to right interior fixed cover I (1.3), piezoelectric ceramic actuator I (1.4) and push rod I (1.5), and described interior fixed cover I (1.3), piezoelectric ceramic actuator I (1.4) and push rod I (1.5) mutually near, described push rod I (1.5) right-hand member and spring push-rod I (2.7) stretch out in two ports valve covers (2.1) parts near, described outer fixing valve pocket I (1.1) is connected and fixed by bolt and valve body (2), described outer fixing valve pocket II (1.2) right-hand member is connected and fixed by screw thread and nut II (3.2), the interior right-to-left of described outer fixing valve pocket II (1.2) is disposed with interior fixed cover II (1.6), piezoelectric ceramic actuator II (1.7) and push rod II (1.8), and described interior fixed cover II (1.6), piezoelectric ceramic actuator II (1.7) and push rod II (1.8) mutually near, described push rod II (1.8) left end and spring push-rod II (2.9) stretch out in spring valve pocket (2.6) part near, described outer fixing valve pocket II (1.2) is connected and fixed by bolt and valve body (2), described nut I (3.1) left side is provided with axial micrometer adjusting screw I (3.3), and described axial micrometer adjusting screw I (3.3) end withstands on interior fixed cover I (1.3) left side, described nut II (3.2) right side is provided with axial micrometer adjusting screw II (3.4), and described axial micrometer adjusting screw II (3.4) end withstands on interior fixed cover II (1.6) right side, described valve body (2) top has water intake (P), working hole (A) and backwater mouth (O), and is provided with valve port damper (2.13) in described water intake (P), working hole (A) and backwater mouth (O), described valve body (2) bottom has the runner (G) that is communicated with valve body (2) two ends, left and right, in described interior fixed cover I (1.3) and nut I (3.1), be provided with the through hole stretching out for piezoelectric ceramic actuator I (1.4) power line, in described interior fixed cover II (1.6) and nut II (3.2), be provided with the through hole stretching out for piezoelectric ceramic actuator II (1.7) power line,
When piezoelectric ceramic actuator II (1.7) dead electricity, piezoelectric ceramic actuator I (1.4) when electric, piezoelectric ceramic actuator I (1.4) promotes push rod I (1.5) and spring push-rod I (2.7) moves right, ceramic ball (2.8) separates with step post I (2.3), ceramic ball (2.8) engages with step post II (2.5), liquid stream is by working hole (A), through hole on octal valve pocket (2.4), step post I (2.3) center hole, inclined hole on six ports valve covers (2.2), enter backwater mouth (O), the upper working hole (A) of valve body (2) and backwater mouth (O) can be through-flow,
When piezoelectric ceramic actuator I (1.4) dead electricity, piezoelectric ceramic actuator II (1.7) when electric, piezoelectric ceramic actuator II (1.7) promotion push rod II (1.8) and spring push-rod II (2.9) are to left movement, ceramic ball (2.8) separates with step post II (2.5), ceramic ball (2.8) engages with step post I (2.3), liquid stream is by water intake (P), the inclined hole of the upper left end of spring valve pocket (2.6), step post II (2.5) center hole, through hole on octal valve pocket (2.4), enter working hole (A), valve body (2) water intake (P) and working hole (A) can be through-flow.
2. the two-way opposed piezoelectric constant selector valve of pure water according to claim 1, it is characterized in that: between two ports valve covers (2.1) and valve body (2), be provided with O-ring seals I (2.14), between six ports valve covers (2.2) and valve body (2), add back-up ring I (2.16) sealing by O-ring seals II (2.15), between step post I (2.3) and valve body (2), add back-up ring II (2.18) sealing by O-ring seals III (2.17), between step post II (2.5) and valve body (2), add back-up ring III (2.20) sealing by O-ring seals IV (2.19), between spring valve pocket (2.6) and valve body (2), seal by O-ring seals V (2.21), between six ports valve covers (2.2) and spring push-rod I (2.7), add back-up ring IV (2.23) sealing by O-ring seals VI (2.22), between spring valve pocket (2.6) and spring push-rod II (2.9), add back-up ring V (2.24) sealing by U-shaped sealing framework II (2.12), U-shaped sealing framework I (2.10) is provided with back-up ring VI (2.25) with two ports valve cover (2.1) inwall annular projection contacting points, body (2) top has water intake (P), working hole (A) and backwater mouth (O) inwall and is respectively arranged with O-ring seals VI (2.25), O-ring seals VII (2.27) and O-ring seals VIII (2.28).
3. the two-way opposed piezoelectric constant selector valve of pure water according to claim 1, is characterized in that: described outer fixing valve pocket I (1.1) and outer fixing valve pocket II (1.2) minimum diameter are less than the minimum diameter of valve body (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210103151.0A CN102619801B (en) | 2012-04-10 | 2012-04-10 | Pure-water bidirectional opposed piezoelectric ceramic reversing valve |
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| CN201210103151.0A CN102619801B (en) | 2012-04-10 | 2012-04-10 | Pure-water bidirectional opposed piezoelectric ceramic reversing valve |
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| CN102619801B true CN102619801B (en) | 2014-10-29 |
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| CN105909587A (en) * | 2016-07-06 | 2016-08-31 | 上海衡拓液压控制技术有限公司 | Force feedback structure for electro-hydraulic servo valve |
| CN109296582B (en) * | 2018-09-28 | 2020-09-08 | 北京全路通信信号研究设计院集团有限公司 | Bidirectional differential pressure control device, electro-hydraulic switch machine and bidirectional differential pressure control method |
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| US5738142A (en) * | 1996-08-09 | 1998-04-14 | Case Corporation | Pressure holding directional control valve |
| CN1587721A (en) * | 2004-08-04 | 2005-03-02 | 浙江大学 | Pure water electromagnetic ball valve |
| CN2729389Y (en) * | 2004-08-04 | 2005-09-28 | 浙江大学 | Water hydraulic magnetic switch valve |
| CN201288715Y (en) * | 2008-10-30 | 2009-08-12 | 杭州水处理技术研究开发中心有限公司 | Directional control valve driven by hydraulic pressure |
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2012
- 2012-04-10 CN CN201210103151.0A patent/CN102619801B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5738142A (en) * | 1996-08-09 | 1998-04-14 | Case Corporation | Pressure holding directional control valve |
| CN1587721A (en) * | 2004-08-04 | 2005-03-02 | 浙江大学 | Pure water electromagnetic ball valve |
| CN2729389Y (en) * | 2004-08-04 | 2005-09-28 | 浙江大学 | Water hydraulic magnetic switch valve |
| CN201288715Y (en) * | 2008-10-30 | 2009-08-12 | 杭州水处理技术研究开发中心有限公司 | Directional control valve driven by hydraulic pressure |
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