CN201844094U - Double-mode electrical digital valve - Google Patents
Double-mode electrical digital valve Download PDFInfo
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- CN201844094U CN201844094U CN2010205722586U CN201020572258U CN201844094U CN 201844094 U CN201844094 U CN 201844094U CN 2010205722586 U CN2010205722586 U CN 2010205722586U CN 201020572258 U CN201020572258 U CN 201020572258U CN 201844094 U CN201844094 U CN 201844094U
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- 239000012530 fluid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
A double-mode electrical digital valve comprises a valve body. A gas inlet, a first gas inlet and outlet port, a second gas inlet and outlet port, a first gas outlet and a second gas outlet are arranged on the valve body, the gas inlet is communicated with a gas source, the first gas inlet and outlet and the second gas inlet and outlet are communicated with pneumatic actuating elements, the first gas outlet and the second gas outlet are communicated with the air, a valve bush is embedded on the inner wall of the valve body, and a valve spool penetrates through the valve bush and is connected with a rotating servo motor and a linear servo motor. At least four shoulders are disposed on the valve spool, at least one groove is uniformly peripherally arranged at the front end surface and the rear end surface of each of the second shoulder and the third shoulder, the numbers of the grooves on different end surfaces of the same shoulder are the same, and the grooves on the different end surfaces of the same shoulder are staggered. At least five circles of valve bush windows are peripherally and uniformly disposed on the valve bush, the first valve bush window is communicated with the first gas outlet, the second valve bush window is communicated with the first gas inlet and outlet, the third valve bush window is communicated with the gas inlet, the fourth valve bush window is communicated with the second gas inlet and outlet, and the fifth valve bush window is communicated with the second gas outlet. The double-mode electrical digital valve realizes the function of opening and closing at high speed, and can also realize precise control of servo and synchronization at low rotation speed.
Description
Technical field
The utility model relates to a kind of digital electric valve field.
Background technique
The widely used valve in fluid control field mainly is divided into switch valve, Proportional valve and servovalve at present.The switch valve majority all is based on the magnetic switch formula, it mainly is to move the break-make of controlling fluid passage by electromagnet absorption spool, so moving element volume inertia is big, support zone is many, frictional force is big, poor linearity, and the response time is slower, causes its switching frequency to be restricted, the output fluid has pulsation, can only be applied to control accuracy is not had the single system of specific (special) requirements.Though servovalve control accuracy height, frequency response is lower, and contamination resistance is poor, and costs an arm and a leg, and cost performance is low.Proportional valve is compared with servovalve, though performance also has a certain distance in some aspects, the Proportional valve contamination resistance is strong, and cost is lower than servovalve, and does not comprise responsive and accurate parts, easier operation and maintenance.But because the critical component that the Proportional valve performance improves is mainly based on proportion electro-magnet, its intrinsic magnetic hysteresis, characteristic such as non-linear have restricted its control accuracy and frequency response and have further improved.
In electric digital valve field, also there is as above technical barrier usually.
Summary of the invention
Can not satisfy the deficiency that realizes servo synchronization control when high speed realizes high-speed switch valve function and low speed down simultaneously in order to overcome existing pneumatic digital valve, the utility model provides a kind of both can realize the high-speed switch valve function under high speed, can realize the two-mode electrically digital valve of servo and synchronous accurate control again under the slow-speed of revolution.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of two-mode electrically digital valve, comprise valve body, the the 1st, the 2nd air outlet that has the suction port that is communicated with source of the gas, the 1st, the 2nd air inlet/outlet that is communicated with pneumatic apparatus on the described valve body and be communicated with atmosphere, described electric digital valve also comprises spool and valve pocket, described valve pocket is nested in the inwall of valve body, described spool passes valve pocket, and described spool is connected with the axially movable linear servo-actuator of actuating valve core with the rotating servo motor that the driving spool rotatablely moves; Described spool is provided with at least four shoulders, be followed successively by the 1st shoulder, the 2nd shoulder, the 3rd shoulder and the 4th shoulder, the the described the 1st and the 4th shoulder is not established groove, each upwards evenly offers at least one groove in week the both sides end face of described the 2nd shoulder and the 3rd shoulder, and the groove number on the same shoulder difference end faces is identical and shift to install; Valve pocket circumferentially evenly offer at least five circle valve pocket windows, be the 1st valve pocket window, the 2nd valve pocket window, the 3rd valve pocket window, the 4th valve pocket window and the 5th valve pocket window successively, the shape of each valve pocket window is identical, described the 1st valve pocket window is communicated with the 1st air outlet, described the 2nd valve pocket window is communicated with the 1st air inlet/outlet, the 3rd valve pocket window is communicated with suction port, and the 4th valve pocket window is communicated with the 2nd air inlet/outlet, and the 5th valve pocket window is communicated with the 2nd air outlet.
Further, the window number of described each circle valve pocket window is at least 1, and window is rectangle or circle.
Further again, described the 2nd valve pocket window and the 4th valve pocket window cooperate the 2nd shoulder and the 3rd shoulder of described spool respectively; Groove sum on the 2nd shoulder of described spool be the integral multiple of described the 2nd valve pocket window number and multiple greater than 1, the groove sum on the 3rd shoulder of described spool is that the integral multiple of described the 4th valve pocket window number and multiple are greater than 1.
The described valve pocket window that respectively encloses is along circumferentially evenly the offering of valve pocket, and the groove on the end face of same shoulder both sides shifts to install.
Adjacent two groove spans on the end face of spool both sides are more than or equal to valve pocket window diameter.
Technical conceive of the present utility model is; The spool of electric digital valve links to each other with actuating motor one rotating shaft, by the relative valve pocket of rotating band movable valve plug of actuating motor one and the rotation of valve body, make along the circumferentially staggered groove of offering of spool land both sides end face and the matching relationship cyclic transformation in certain sequence of the window on the valve pocket.For example: when spool high speed folk prescription during to continuous rotation, the the 1st and the 2nd air inlet/outlet also alternately is communicated with source of the gas and atmosphere on the valve body, can realize independently two high-speed switch valve air inlet/outlet functions, its switching frequency and motor speed, groove number are proportional, the working flow of valve and groove number and number of windows and valve port area of passage are proportional, close control so be easy to improve the frequency of okperation of switch valve and realize that big flow field is run jointly.Near positive and negative rotation and when accurately locating under the cooperation of monitoring devices such as actuating motor and corner, pressure, flow, realizing the spool zero-bit, the controlled throttle of formation between the 2nd and the 4th valve pocket window on the groove of the 2nd and the 3rd shoulder and the valve pocket on the spool.If the dislocation of appropriate design the 2nd and the 3rd shoulder relation, then the phase difference of the turnover gas of two restrictions is that 0 ~ 180 degree is adjustable continuously, control when so the 1st and the 2nd air inlet/outlet can be realized two chamber gas circuits of final controlling element such as double-acting cylinder easily on the valve body, and then realize flow, the pressure of controlled final controlling element, the servocontrol or the synchronization control of speed.
Described spool the 2nd and the 3rd shoulder structure are in full accord, and only be the position relation along the valve core shaft translation: promptly two shoulders are with not misplacing along circumferential between the groove on the side end face.Two air inlet/outlet fluid flow directions on the valve body are opposite at this moment, so the signaling switch action is anti-phase under the switching state output, and differential ratio output state is fit to control double-action final controlling element realization servocontrol.
Described spool the 2nd and the 3rd shoulder structure are in full accord, only are mirror image symmetrical position relations: promptly do not misplace along circumferential between the groove on the two shoulder heteropleural end faces.Two air inlet/outlet fluid flow directions on the valve body are identical at this moment, so the signaling switch action is synchronous under the switching state output, the ratio output state then is fit to drive two (many) cylinders synchro systems of precision.
Certainly, this programme also can be applicable to the electrohydraulic digital valve occasion simultaneously.
The beneficial effects of the utility model mainly show: both can realize the high-speed switch valve function under high speed, and can realize servo and synchronous accurate control again under the slow-speed of revolution.
Description of drawings
Fig. 1 is the axial, cross-sectional view of the electric digital valve of the utility model.
Fig. 2 is an assembly decomposition view of the present utility model.
Fig. 3 is a valve port standard-sized sheet of the present utility model, and P-A is communicated with through-flow, and B-R2 is communicated with the reflux state schematic representation, wherein, 20 is the projection of valve pocket window, and 21 is the 2nd shoulder left side groove, 22 is the 2nd shoulder right groove, and 23 is the 3rd shoulder left side groove, and 24 is the 3rd shoulder right groove.
Fig. 4 is a valve port standard-sized sheet of the present utility model, and P-B is communicated with through-flow, and A-R1 is communicated with the reflux state schematic representation, wherein, 20 is the projection of valve pocket window, and 21 is the 2nd shoulder left side groove, 22 is the 2nd shoulder right groove, and 23 is the 3rd shoulder left side groove, and 24 is the 3rd shoulder right groove.
Fig. 5 is a valve port full cut-off of the present utility model, and P, A, B, R1, R2 be connected state schematic representation not mutually, wherein, 20 is the projection of valve pocket window, and 21 is the 2nd shoulder left side groove, and 22 is the 2nd shoulder right groove, 23 is the 3rd shoulder left side groove, and 24 is the 3rd shoulder right groove.
Fig. 6 is that the utility model is under digit control proportional flow control valve pattern, the through-flow supercharging of P-A throttling, B-R2 throttling backflow decompression state schematic representation, wherein, 20 is the projection of valve pocket window, and 21 is the 2nd shoulder left side groove, and 22 is the 2nd shoulder right groove, 23 is the 3rd shoulder left side groove, and 24 is the 3rd shoulder right groove.
Fig. 7 is that the utility model is under digit control proportional flow control valve pattern, the through-flow supercharging of P-B throttling, A-R1 throttling backflow decompression state schematic representation, wherein, 20 is the projection of valve pocket window, and 21 is the 2nd shoulder left side groove, and 22 is the 2nd shoulder right groove, 23 is the 3rd shoulder left side groove, and 24 is the 3rd shoulder right groove.
Fig. 8 is the schematic representation of the utility model under synchronous switch and Proportional valve pattern, and wherein, 20 is the projection of valve pocket window, and 21 is the 2nd shoulder left side groove, and 22 is the 2nd shoulder right groove, and 23 is the 3rd shoulder left side groove, and 24 is the 3rd shoulder right groove.
Fig. 9 is that the utility model is operated in the fundamental diagram that drives two independent final controlling element switch motions under the asynchronous high-speed switch valve pattern, and wherein, 25 is first switch actuator, and 26 is the second switch final controlling element.
Figure 10 is that the utility model is operated in the fundamental diagram of uniting driving double-action final controlling element 27 under the proportional flow control valve pattern.
Figure 11 is the fundamental diagram that the utility model is operated in synchronous output state.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described
With reference to Fig. 1 ~ Figure 11, a kind of two-mode electrically digital valve, comprise valve body 1, have the suction port 4 that is communicated with source of the gas on the described valve body 1, the 1st air inlet/outlet 5 that is communicated with pneumatic apparatus, the 2nd air inlet/outlet 6 and the 1st air outlet 8 that is communicated with atmosphere, the 2nd air outlet 9, spring 7 is used for spool when installing and the valve body pretension, this digital valve also comprises spool 2 and valve pocket 3, described valve pocket 3 is nested in the inwall of valve body 1, described spool 2 passes valve pocket 3, and described spool 2 is connected with the axially movable linear servo-actuator of actuating valve core with the rotating servo motor that the driving spool rotatablely moves; Described spool 2 is provided with at least four shoulders, be followed successively by the 1st shoulder the 10, the 2nd shoulder the 11, the 3rd shoulder 12 and the 4th shoulder 13, described the 1st shoulder 10 and the 4th shoulder 13 are not established groove, each upwards evenly offers at least one groove in week the both sides end face of described the 2nd shoulder and the 3rd shoulder, and the groove number on the same shoulder difference end faces is identical and shift to install; Valve pocket 3 circumferentially evenly offer at least five circle valve pocket windows, be the 1st valve pocket window the 15, the 2nd valve pocket window the 16, the 3rd valve pocket window the 17, the 4th valve pocket window 18 and the 5th valve pocket window 19 successively, described the 1st valve pocket window 15 is communicated with the 1st air outlet 8, described the 2nd valve pocket window 16 is communicated with the 1st air inlet/outlet 5, the 3rd valve pocket window 17 is communicated with suction port 4, the 4th valve pocket window 18 is communicated with the 2nd air inlet/outlet 6, and the 5th valve pocket window 19 is communicated with the 2nd air outlet 9.
The window number of described each circle valve pocket window is at least 1, and window is rectangle or circle.Described the 2nd valve pocket window and the 4th valve pocket window cooperate the 2nd and the 3rd shoulder of described spool respectively.Groove sum on the 2nd shoulder of described spool is that the integral multiple of described the 2nd valve pocket window number and multiple are greater than 1.Groove sum on the 3rd shoulder of described spool is that the integral multiple of described the 4th valve pocket window number and multiple are greater than 1.The described valve pocket window that respectively encloses is along circumferentially evenly the offering of valve pocket, and the groove on the end face of same shoulder both sides shifts to install.When more than one of valve pocket window, the double-edged groove of spool need avoid being communicated with simultaneously the valve pocket window.Adjacent two groove spans on the end face of spool both sides more than or equal to valve pocket window diameter to avoid the negative covering of spool to valve port.
With reference to accompanying drawing 1, the P mouth is a suction port 4, and the A mouth is the 1st air inlet/outlet 5, and the B mouth is the 2nd air inlet/outlet 6, and the R1 mouth is the 1st air outlet, and the R2 mouth is the 2nd air outlet.
The scheme of present embodiment also can be applicable to electrohydraulic digital valve, makes electrohydraulic digital valve can be operated in high-speed switch valve and two kinds of patterns of ratio flow directional control valve.
Example 1: when spool is in position shown in Figure 3 in rotation process, the P mouth is communicated with the A mouth, the B mouth is communicated with the R2 mouth, and one road fluid (gas or hydraulic oil) flows into switch actuator 1 actuator chamber by the P mouth through the A mouth, and another road fluid unloads through B mouth to R2 mouth from switch actuator 2 actuator chambers.When continuing rotary spool to the process of position shown in Figure 5, the flow that flows into switch actuator 1 actuator chamber through the A mouth by the P mouth constantly reduces and finally is turned off, and also constantly reduces and finally be turned off through B mouth to R2 mouth relief circuit flow from switch actuator 2 actuator chambers.Spool continues to rotate in the process of position shown in Figure 4, and fluid passage is switched, and to the unloading of R1 mouth, another path loads through the actuator chamber of B mouth to switch actuator 2 from the P mouth switch actuator 1 actuator chamber through the A mouth.So far finished the output overall process of a switching value.Along with the carrying out of rotation, this process is carried out repeatedly, and A, B mouth alternately are communicated with respectively at P, R mouth, realizes that switch valve drives function.The switch valve frequency is directly proportional with rotating speed, shoulder groove number under this pattern, can simply change switching frequency by the rotating speed that changes actuating motor 1 in the actual using process.If in above-mentioned cyclic process, use servovalve 2 to change the axial position of spool simultaneously, then can change the covering amount of spool, thereby change the through-current capability of valve port valve port, realize the control of output power.Switch control principle figure sees Fig. 9.
Example 2: when spool is in Fig. 5 position, the valve port contract fully, then P, A, B, R1, each mouthful of R2 all are cut off, and spool is in zero-bit, and I/O traffic is zero, final controlling element stop motion this moment.Can pass through actuating motor 1 and actuating motor 2 according to servo-controlled mission requirements, near the positive and negative rotation and moving axially zero-bit of continuous control spool, promptly by state shown in Figure 5 to state exchange shown in Figure 6 or oppositely to state exchange shown in Figure 7.Change valve port opening and path direction, thereby the flow size and Orientation of control A, the output of B two-way is realized the servocontrol purpose.Differential output servocontrol fundamental diagram is seen Figure 10.
Example 3: when the spool land structure as shown in Figure 8 because valve core rotation keeps synchronously the selection of two valve port switch ways, then the fluid flow of A, B mouth and direction also change synchronously, high conformity can be realized the driving function of synchronization control final controlling element.Synchronous working output principle figure sees Figure 11.
Claims (5)
1. two-mode electrically digital valve, comprise valve body, the the 1st, the 2nd air outlet that has the suction port that is communicated with source of the gas, the 1st, the 2nd air inlet/outlet that is communicated with pneumatic apparatus on the described valve body and be communicated with atmosphere, it is characterized in that: described electric digital valve also comprises spool and valve pocket, described valve pocket is nested in the inwall of valve body, described spool passes valve pocket, and described spool is connected with the axially movable linear servo-actuator of actuating valve core with the rotating servo motor that the driving spool rotatablely moves; Described spool is provided with at least four shoulders, be followed successively by the 1st shoulder, the 2nd shoulder, the 3rd shoulder and the 4th shoulder, each upwards evenly offers at least one groove in week the both sides end face of described the 2nd shoulder and the 3rd shoulder, and the groove number on the same shoulder difference end faces is identical and shift to install; Valve pocket circumferentially evenly offer at least five circle valve pocket windows, be the 1st valve pocket window, the 2nd valve pocket window, the 3rd valve pocket window, the 4th valve pocket window and the 5th valve pocket window successively, the shape of each valve pocket window is identical, described the 1st valve pocket window is communicated with the 1st air outlet, described the 2nd valve pocket window is communicated with the 1st air inlet/outlet, the 3rd valve pocket window is communicated with suction port, and the 4th valve pocket window is communicated with the 2nd air inlet/outlet, and the 5th valve pocket window is communicated with the 2nd air outlet.
2. two-mode electrically digital valve as claimed in claim 1 is characterized in that: the window number of described each circle valve pocket window is at least 1, and window is rectangle or circle.
3. two-mode electrically digital valve as claimed in claim 1 or 2 is characterized in that: described the 2nd valve pocket window and the 4th valve pocket window cooperate the 2nd shoulder and the 3rd shoulder of described spool respectively; Groove sum on the 2nd shoulder of described spool be the integral multiple of described the 2nd valve pocket window number and multiple greater than 1, the groove sum on the 3rd shoulder of described spool is that the integral multiple of described the 4th valve pocket window number and multiple are greater than 1.
4. two-mode electrically digital valve as claimed in claim 1 or 2 is characterized in that: the described valve pocket window that respectively encloses is along circumferentially evenly the offering of valve pocket, and the groove on the end face of same shoulder both sides shifts to install.
5. two-mode electrically digital valve as claimed in claim 1 or 2 is characterized in that: the adjacent two groove spans on the both sides end face of described spool land are more than or equal to valve pocket window diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205722586U CN201844094U (en) | 2010-10-22 | 2010-10-22 | Double-mode electrical digital valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205722586U CN201844094U (en) | 2010-10-22 | 2010-10-22 | Double-mode electrical digital valve |
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| CN201844094U true CN201844094U (en) | 2011-05-25 |
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| CN2010205722586U Expired - Fee Related CN201844094U (en) | 2010-10-22 | 2010-10-22 | Double-mode electrical digital valve |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963166A (en) * | 2010-10-22 | 2011-02-02 | 浙江工业大学 | Dual-mode electric digital valve |
| CN102434515A (en) * | 2011-11-17 | 2012-05-02 | 西安交通大学 | Hydraulic rotation valve with square-wave-shaped valve core |
| CN103161788A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Rotary type two-way proportional pressure regulating mechanism |
| CN103161792A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Pressure regulating mechanism capable of setting initial pressure |
| CN103161787A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Dual-redundancy proportional pressure regulating mechanism |
| CN103161790A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Bidirectional differential-motion proportional pressure regulating mechanism |
| CN103161791A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Bidirectional proportional pressure regulating mechanism |
| CN103161786A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Rotary type differential motion proportional pressure regulating mechanism |
| CN103321980A (en) * | 2013-06-24 | 2013-09-25 | 大连理工大学 | Area-gradient-variable digital rotary valve |
| CN105736744A (en) * | 2016-04-21 | 2016-07-06 | 浙江艾波特环保科技股份有限公司 | Mechanical-controlled water purifier tap |
| CN105757327A (en) * | 2016-04-21 | 2016-07-13 | 浙江艾波特环保科技股份有限公司 | Water purifier with mechanical control faucet |
| CN107559459A (en) * | 2017-09-11 | 2018-01-09 | 南宁宇立仪器有限公司 | A kind of electrical servo valve |
| CN111043095A (en) * | 2019-12-25 | 2020-04-21 | 中航工业南京伺服控制***有限公司 | Zero-leakage double-hydraulic-system conversion device |
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2010
- 2010-10-22 CN CN2010205722586U patent/CN201844094U/en not_active Expired - Fee Related
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963166A (en) * | 2010-10-22 | 2011-02-02 | 浙江工业大学 | Dual-mode electric digital valve |
| CN102434515A (en) * | 2011-11-17 | 2012-05-02 | 西安交通大学 | Hydraulic rotation valve with square-wave-shaped valve core |
| CN103161791B (en) * | 2013-03-14 | 2014-12-17 | 浙江工业大学 | Bidirectional proportional pressure regulating mechanism |
| CN103161787B (en) * | 2013-03-14 | 2014-12-17 | 浙江工业大学 | Dual-redundancy proportional pressure regulating mechanism |
| CN103161787A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Dual-redundancy proportional pressure regulating mechanism |
| CN103161790A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Bidirectional differential-motion proportional pressure regulating mechanism |
| CN103161791A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Bidirectional proportional pressure regulating mechanism |
| CN103161786A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Rotary type differential motion proportional pressure regulating mechanism |
| CN103161792B (en) * | 2013-03-14 | 2015-06-03 | 浙江工业大学 | Pressure regulating mechanism capable of setting initial pressure |
| CN103161788B (en) * | 2013-03-14 | 2014-12-03 | 浙江工业大学 | Rotary type two-way proportional pressure regulating mechanism |
| CN103161788A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Rotary type two-way proportional pressure regulating mechanism |
| CN103161792A (en) * | 2013-03-14 | 2013-06-19 | 浙江工业大学 | Pressure regulating mechanism capable of setting initial pressure |
| CN103161790B (en) * | 2013-03-14 | 2015-04-22 | 浙江工业大学 | Bidirectional differential-motion proportional pressure regulating mechanism |
| CN103321980A (en) * | 2013-06-24 | 2013-09-25 | 大连理工大学 | Area-gradient-variable digital rotary valve |
| CN103321980B (en) * | 2013-06-24 | 2015-11-18 | 大连理工大学 | A kind of Area-gradient-variabdigital digital rotary valve |
| CN105736744A (en) * | 2016-04-21 | 2016-07-06 | 浙江艾波特环保科技股份有限公司 | Mechanical-controlled water purifier tap |
| CN105757327A (en) * | 2016-04-21 | 2016-07-13 | 浙江艾波特环保科技股份有限公司 | Water purifier with mechanical control faucet |
| CN105736744B (en) * | 2016-04-21 | 2017-12-29 | 浙江艾波特环保科技股份有限公司 | A kind of water faucet of water purifier of Mechanical course |
| CN105757327B (en) * | 2016-04-21 | 2018-08-17 | 浙江艾波特环保科技股份有限公司 | A kind of water purifier using Mechanical course tap |
| CN107559459A (en) * | 2017-09-11 | 2018-01-09 | 南宁宇立仪器有限公司 | A kind of electrical servo valve |
| CN107559459B (en) * | 2017-09-11 | 2024-04-12 | 南宁宇立仪器有限公司 | Electric servo valve |
| CN111043095A (en) * | 2019-12-25 | 2020-04-21 | 中航工业南京伺服控制***有限公司 | Zero-leakage double-hydraulic-system conversion device |
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