CN104179750A - Digital-analog hybrid directional control valve - Google Patents
Digital-analog hybrid directional control valve Download PDFInfo
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- CN104179750A CN104179750A CN201410410476.2A CN201410410476A CN104179750A CN 104179750 A CN104179750 A CN 104179750A CN 201410410476 A CN201410410476 A CN 201410410476A CN 104179750 A CN104179750 A CN 104179750A
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- 239000012530 fluid Substances 0.000 claims description 88
- 239000002828 fuel tank Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention discloses a digital-analog hybrid directional control valve comprising a valve body and a valve spool mounted inside the valve body. An oil port P, an oil port T, an oil port A and an oil port B are arranged on the valve body, and the inner surface of the valve body is symmetrically provided with a group of sunken slots including an sunken slot e and a sunken slot f respectively connected with the oil port P and the oil port T. Two ends of the valve spool respectively penetrate in valve spool return springs, then extend out end caps and butt against push rods, the other side of each push rod is provided with an electromagnet, a group of V-shaped positioning grooves are arranged on the surfaces of the upper and lower sides of the valve spool symmetrically, a group of sector sunken slots including a sector sunken slot x, a sector sunken slot y, a sector sunken slot m and a sector sunken slot n are symmetrically arranged in the center of the circumferential surface of the valve spool close to the oil port P, the sector sunken slot m is communicated with the sector sunken slot y through a fold line oil hole p, and the sector sunken slot x is communicated with the sector sunken slot n through a fold line oil hole g. The digital-analog hybrid directional control valve directly receives a pulse digital signal to control the flowing direction of oil, and start-stop and reversing of an actuator are realized; three different neutral position functions can be further provided.
Description
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Technical field
The present invention relates to a kind of hydraulic control component, particularly a kind of digital-to-analogue with three kinds of Median Functions is mixed the 3-position 4-way digital hydraulic position control valve of controlling.
Background technique
By computer-controlled electrohydraulic system, be widely used.But traditional electric liquid position control valve can only be accepted voltage or current analog signal, and same control valve can only provide a kind of Median Function.Adopt the control valve of directly accepting pulse digital signal, can not only simplify hydraulic system, reduce costs, reduce power consumption, and can improve system rejection to disturbance and pollution capacity, strengthen working stability.But the development of electrohydraulic digital valve is still slower both at home and abroad at present, and available kind is few.Therefore, " number-mould " mix to be controlled and to be become the most frequently used mode, and existing simulation control valve in system, has again digital control valve, but two kinds of control modes are integrated in to same control valve, and the position control valve that can realize multiple Median Function not yet occurs.
Summary of the invention
Goal of the invention: the object of the invention is to solve deficiency of the prior art, a kind of digital-to-analogue hybrid directional control valve is provided.
Technological scheme: a kind of digital-to-analogue hybrid directional control valve of the present invention, comprise valve body and spool, the two ends of described valve body are respectively arranged with end cap, described spool is installed on valve inner, the appearance of described valve body top is provided with P hydraulic fluid port, T hydraulic fluid port, A hydraulic fluid port and the B hydraulic fluid port being connected with spill port with oil pump, fuel tank, executive component oil inlet hole respectively, is arranged with one group of e deep gouge and f deep gouge being connected with T hydraulic fluid port with P hydraulic fluid port respectively in the Vertical direction of the internal surface of valve body; The two ends of described spool are stretched out end cap and offset with push rod after penetrating respectively valve core reseting spring, the opposite side of push rod is equipped with electromagnet, on the surface of the upper and lower both sides of spool, be arranged with one group of V-type locating slot, spool circumferential surface Central Symmetry near P hydraulic fluid port offers one group of fan-shaped deep gouge of fan-shaped deep gouge: x, the fan-shaped deep gouge of y, the fan-shaped deep gouge of m and the fan-shaped deep gouge of n, the fan-shaped deep gouge of described m is communicated with the fan-shaped deep gouge of y by p broken line oilhole, and the fan-shaped deep gouge of described x is communicated with by g broken line oilhole and the fan-shaped deep gouge of n.
Wherein, two electromagnet are accepted analogue signal and are driven the relative valve body of spool to slide by two of left and right push rod, and then provide " O ", " M ", three kinds of different Median Functions of " H " type, and stepper motor is accepted digital signal, and drive driven wheel of differential by drive bevel gear transmission, and then drive spool relative valve body in valve body to pivot, " left position ", " right position ", " meta " three different operating positions are provided.
Further, in the Vertical direction of the internal surface of described valve body, be also arranged with one group of the first deep gouge and second deep gouge being connected with B hydraulic fluid port with A hydraulic fluid port respectively, spool circumferential surface Central Symmetry near A hydraulic fluid port is separately provided with one group of fan-shaped deep gouge in addition: the first fan-shaped deep gouge, the second fan-shaped deep gouge, the 3rd fan-shaped deep gouge and four fan-shaped deep gouge, described the first fan-shaped deep gouge is communicated with four fan-shaped deep gouge by the first broken line oilhole, and described the second fan-shaped deep gouge is communicated with by the second broken line oilhole and the 3rd fan-shaped deep gouge.
Further, described valve core inside is along being axially arranged with k slotted hole and q slotted hole along spool, and described k slotted hole is by p broken line oilhole and the second broken line oilhole conducting, and described q slotted hole is by g broken line oilhole and the first broken line oilhole conducting.
Further, the joint of described spool and two end caps is all fixed by axle sleeve, and in addition, one end of spool is connected with driven wheel of differential by splined shaft, and driven wheel of differential top is provided with the drive bevel gear being connected with stepper motor.
For guaranteeing the accuracy of the initial rotational position of spool (meta), in described V-type locating slot, be placed with rotation place kick, two surfaces up and down of described valve body are provided with the filling hole being connected with two V-type locating slots respectively, in filling hole, be placed with and the retaining spring that rotates place kick and offset, the top in filling hole is stifled adjusting screw.
For guaranteeing the sealing of spool, described spool circumferential surface is provided with some seal rings.
Further, described valve body is provided with w " L " type oilhole and w ' " L " type oilhole, described spool is provided with the v vertical oilhole corresponding with w " L " type oilhole and w ' " L " type oilhole difference and the vertical oilhole of v ', on spool, along spool, is radially also provided with i through hole, u through hole, j through hole and o through hole.
Beneficial effect: compared with prior art, the present invention has the following advantages:
(1) the present invention be take digital controlly as main, and it is auxiliary that simulation is controlled, and can directly accept the stepper motor of pulse digital signal by spline and bevel gear driving Spool rotating, controls fluid flow direction, realizes start-stop and the commutation of executive component.
(2) electromagnet that the present invention can also accept analogue signal promotes spool and moves, and three kinds of different Median Functions are provided, and has optimized the control function of hydraulic system.
(3) the present invention can provide multiple Median Function, has simplified hydraulic control system, finally can reduce the quantity of valve, reduces the cost of production, operation and maintenance.
(4) the present invention can increase the control function with optimization system, development of new hydraulic system.
(5) the present invention is conducive to realize the control of computer to hydraulic system, has improved automaticity.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 (a) be in Fig. 1 B-B to sectional view;
Fig. 2 (b) be in Fig. 1 C '-C ' to sectional view;
Fig. 2 (c) be in Fig. 1 C-C to sectional view;
Fig. 2 (d) be in Fig. 1 C ' '-C ' ' to sectional view;
Fig. 2 (e) is the plan view of K direction in Fig. 1;
Fig. 2 (f) be in Fig. 1 E '-E ' to sectional view;
Fig. 2 (g) be in Fig. 1 E-E to sectional view;
Fig. 2 (h) be in Fig. 1 E ' '-E ' ' to sectional view;
Fig. 3 is that the middle S-S of Fig. 2 (c) is to sectional view;
Fig. 4 (a) is the functional schematic symbol diagram while being positioned at " H " type Median Function;
Fig. 4 (b) is the functional schematic symbol diagram while being positioned at " O " type Median Function;
Fig. 4 (c) is the functional schematic symbol diagram while being positioned at " M " type Median Function;
C-C when Fig. 5 (a) is spool static (meta) is to generalized section;
E-E when Fig. 5 (b) is spool static (meta) is to generalized section;
C-C when Fig. 6 (a) is rotated counterclockwise (left position) for spool is to generalized section;
E-E when Fig. 6 (b) is rotated counterclockwise (left position) for spool is to generalized section;
C-C when Fig. 7 (a) turns clockwise (right position) for spool is to generalized section;
E-E when Fig. 7 (b) turns clockwise (right position) for spool is to generalized section.
Embodiment
Below technical solution of the present invention is elaborated by reference to the accompanying drawings.
As shown in Figures 1 to 7, a kind of digital-to-analogue hybrid directional control valve of the present invention, comprise valve body 6 and the spool 7 that is installed on valve body 6 inside, the two ends of valve body 6 are respectively arranged with end cap 4, the appearance of valve body 6 tops is provided with P hydraulic fluid port 21, T hydraulic fluid port 20, A hydraulic fluid port 23 and the B hydraulic fluid port 22 being connected with spill port with oil pump, fuel tank, executive component oil inlet hole respectively, is arranged with one group of e deep gouge 41 and f deep gouge 42 being connected with T hydraulic fluid port 20 with P hydraulic fluid port 21 respectively in the Vertical direction of the internal surface of valve body 6; The two ends of spool 7 are stretched out end cap 4 and offset with push rod 2 after penetrating respectively spool 7 Returnning springs 5, the opposite side of push rod 2 is equipped with electromagnet 1, on the surface of spool both sides Shang Xia 7, be arranged with one group of V-type locating slot 30, spool 7 circumferential surface Central Symmetries near P hydraulic fluid port 21 offer one group of fan-shaped deep gouge 33 of fan-shaped deep gouge: x, the fan-shaped deep gouge 34 of y, the fan-shaped deep gouge 35 of m and the fan-shaped deep gouge 36 of n, the fan-shaped deep gouge 35 of m is communicated with the fan-shaped deep gouge 34 of y by p broken line oilhole 37, and the fan-shaped deep gouge 33 of x is communicated with by g broken line oilhole 38 and the fan-shaped deep gouge 36 of n.
E-E profile position in Fig. 1, valve interior surface has deep gouge and the oilhole identical with C-C section with valve core outer surface, but direction rotation 90 °, axial k slotted hole and q slotted hole on spool are communicated with C-C section with E-E section, specific as follows:
In the Vertical direction of the internal surface of valve body 6, be also arranged with one group of the first deep gouge and second deep gouge being connected with B hydraulic fluid port 22 with A hydraulic fluid port 23 respectively, spool 7 circumferential surface Central Symmetries near A hydraulic fluid port 23 are separately provided with one group of fan-shaped deep gouge in addition: the first fan-shaped deep gouge, the second fan-shaped deep gouge, the 3rd fan-shaped deep gouge and four fan-shaped deep gouge, the first fan-shaped deep gouge is communicated with four fan-shaped deep gouge by the first broken line oilhole, and the second fan-shaped deep gouge is communicated with by the second broken line oilhole and the 3rd fan-shaped deep gouge; In addition, spool 7 inside are axially arranged with k slotted hole 39 and q slotted hole 40 along spool 7, and k slotted hole 39 is by p broken line oilhole 37 and the second broken line oilhole conducting, and q slotted hole 40 is by g broken line oilhole 38 and the first broken line oilhole conducting.
Spool 7 in the present embodiment and the joint of two end caps 4 are all fixing by axle sleeve 3, and in addition, one end of spool 7 is connected with driven wheel of differential 13 by spline 16 axles, and driven wheel of differential top is provided with the drive bevel gear 14 being connected with stepper motor 15; And spool 7 circumferential surfaces are provided with some seal rings 11.
For guaranteeing the accuracy of spool 7 initial rotational position (meta), in V-type locating slot 30, be placed with rotation place kick 10, two surfaces up and down of valve body 6 are provided with the filling hole 31 being connected with two V-type locating slots 30 respectively, in filling hole 31, be placed with and the retaining spring 8 that rotates place kick 10 and offset, the top in filling hole 31 is stifled adjusting screw 9.
Valve body 6 is provided with w " L " type oilhole 19 and w ' " L " type oilhole 27, spool 7 is provided with the v vertical oilhole 18 corresponding with w " L " type oilhole 19 and w ' " L " type oilhole 27 difference and the vertical oilhole 26 of v ', at section C '-C ', C ' '-C ' ' and E '-E ', in E ' '-E ' ', on spool 7, along spool 7, be radially also respectively equipped with i through hole 24, u through hole 17, j through hole 25 and o through hole 32, when the relative valve body 6 of spool 7 move right l apart from time, by k slotted hole, make respectively w " L " type oilhole 19 be communicated with the vertical oilhole 18 of v, w ' " L " type oilhole 27 and v ' vertically oilhole 26 are communicated with.
As shown in Figure 1, section C '-C ', C ' '-C ' ' and E '-E ', E ' '-E ' ' are symmetrical in section C-C, E-E respectively.C-C section and E-E section are depicted as spool 7 in meta (initial position), now stepper motor 15 is without input pulse signal, in B-B section, locking ball falls into respectively two V-type locating slots 30, guarantees that thus P hydraulic fluid port 21, T hydraulic fluid port 20, A hydraulic fluid port 23 and B hydraulic fluid port 22 are not communicated with mutually.When spool 7 is to the right or left axially during equidistant mobile l stroke, P hydraulic fluid port 21, T hydraulic fluid port 20, A hydraulic fluid port 23 and B hydraulic fluid port 22 have different mode of communicating, and control valve can obtain different " meta " functions.
When stepper motor 15, control spools 7 rotations when " left position ", P hydraulic fluid port 21 and A hydraulic fluid port 23 are communicated with, and T hydraulic fluid port 20 and B hydraulic fluid port 22 are communicated with; When spool 7 is when " right position ", P hydraulic fluid port 21 and B hydraulic fluid port 22 are communicated with, and T hydraulic fluid port 20 and A hydraulic fluid port 23 are communicated with.Its functional symbol as shown in Figure 4.
By controlling two of left and rights electromagnet 1, obtain electric or dead electricity, realize control valve " O ", " M ", three kinds of different Median Functions of " H " type, when spool 7 is not subject to stepper motor 15 driving (spool 7 initial positions), P hydraulic fluid port 21, T hydraulic fluid port 20, A hydraulic fluid port 23 and B hydraulic fluid port 22 these four hydraulic fluid ports have three kinds of different mode of communicating.As when spool 7 is during in " O " type function, four hydraulic fluid ports are not communicated with mutually, adopt this function, and hydraulic actuator is quit work, not off-load of oil pump; When spool 7 is during in " H " type function, four hydraulic fluid ports are interconnected, and adopt this function, make hydraulic actuator in quick condition, oil pump off-load; When spool 7 is during in " M " type function, P hydraulic fluid port 21 is communicated with T hydraulic fluid port 20, and A hydraulic fluid port 23 seals each other with B hydraulic fluid port 22, adopts this function, hydraulic actuator is quit work, oil pump off-load.Every kind of Median Function provides hydraulic system different control functions and purposes.Its functional symbol also as shown in Figure 4.
Specific works principle of the present invention is as follows:
(1) spool 7 rotations
When two electromagnet 1 are during all in power failure state, the Returnning spring 5 of the left and right sides guarantees that spool 7 is when endwisely slipping, and stepper motor 15 drives the relative valve body 6 of spool 7 clockwise or be rotated counterclockwise by drive bevel gear 14, driven wheel of differential 13 and spline 16.If stepper motor 15 is without input pulse signal, the relative valve body 6 of spool 7 is static, and control valve is in " meta " (initial position), as shown in Figure 5.Now, P hydraulic fluid port 21, T hydraulic fluid port 20, A hydraulic fluid port 23 and B hydraulic fluid port 22 all seal, and place kick, under the effect of Returnning spring 5, embeds V-type locating slot 30, guarantees the accuracy of spool 7 initial positions.If stepper motor 15 input pulse signals, make stepper motor 15 drive spool 7 when valve body 6 counterclockwise rotates, the fan-shaped deep gouge 33 of x and the fan-shaped deep gouge 34 of y align with e deep gouge 41 and f deep gouge 42 respectively, the axial q slotted hole on spool 7 and k slotted hole 39 are communicated with A hydraulic fluid port 23 and B hydraulic fluid port 22 on E-E section respectively to make P hydraulic fluid port 21 on C-C section and T hydraulic fluid port 20, be that control valve provides " left position " state, as shown in Figure 6.When stepper motor 15 drives spool 7 when valve body 6 clockwise directions rotate, on C-C section, the fan-shaped deep gouge 35 of m and the fan-shaped deep gouge 36 of n align with e and f deep gouge 42 respectively, P hydraulic fluid port 21 and T hydraulic fluid port 20 are communicated with B hydraulic fluid port 22 and A hydraulic fluid port 23 on E-E section through the fan-shaped deep gouge 35 of m, g broken line oilhole 38 and q slotted hole 40, k slotted hole 39, be that control valve provides " right position " state, as shown in Figure 7.
(2) spool 7 slides
When stepper motor 15 nothings are come in and gone out pulse signal, spool 7 does not rotate.Control valve body 6 arranged on left and right sides electromagnet 1 obtain electric or dead electricity, drive the relative valve body 6 of spool 7 to slide, and can obtain different " meta " functions.
1) realization of " O " type Median Function
When left and right electromagnet 1 is during all in power failure state, spool 7 is in meta, position as shown in C-C section in Fig. 1 and E-E section, and now P hydraulic fluid port 21, T hydraulic fluid port 20, A hydraulic fluid port 23 and B hydraulic fluid port 22 are not communicated with mutually, form so-called " O " type Median Function, it represents symbol as shown in Figure 4 (b).
2) realization of " H " type Median Function
Electromagnet 1 energising when left side, electromagnet 1 dead electricity on right side, the push rod 2 in left side promotes spools 7 and overcomes the Returnning spring 5 power l distance that moves to right, spool 7C '-C ' is overlapped with valve body 6C-C section, spool 7E '-E ' overlaps with valve body 6E-E section, the vertical oilhole 26 l distance that also moves to right of the vertical oilhole 18 of v and v ' on spool 7.Now, the oil circuit of P hydraulic fluid port 21 is communicated with through e deep gouge 41, p broken line oilhole 37, f deep gouge 42 and T hydraulic fluid port 20; In like manner, u through hole 17 is communicated with B hydraulic fluid port 22 by A hydraulic fluid port 23.Meanwhile, w " L " type oilhole 19, w ' " L " type oilhole 27 are communicated with T hydraulic fluid port 20, B hydraulic fluid port 22 by the vertical oilhole 18 of v, the vertical oilhole 26 of v ' and k slotted hole 39.So, P hydraulic fluid port 21, T hydraulic fluid port 20, A hydraulic fluid port 23 and B hydraulic fluid port 22 communicate with each other, and form " H " type Median Function, and it represents symbol as shown in Figure 4 (a).
3) realization of " M " type Median Function
When 1 energising of right electromagnet, left electromagnet 1 dead electricity, right push rod 2 promotes spools 7 and overcomes the Returnning spring 5 power l distance that moves to left, and spool 7C ' '-C ' ' is overlapped with valve body 6C-C section.Now P hydraulic fluid port 21 is communicated with through e deep gouge 41, o through hole 32, f deep gouge 42 and T hydraulic fluid port 20; Meanwhile, spool 7E ' '-E ' ' section overlaps with valve body 6E-E section, but A hydraulic fluid port 23 is obstructed each other with B hydraulic fluid port 22.Therefore, form " M " type Median Function, it represents symbol as shown in Figure 4 (c).
When spool 7 passes through rotation from " H " type or " M " type meta wish, while being switched to " left position " or " right position ", must first get back to " O " type meta.Therefore,, when electromagnet 1 is in running order, stepper motor 15 is answered no signal input; When stepper motor 15 work, two of left and right electromagnet 1 all should be switched on.It is easily to realize that this electric controlled interlocking requires.
Oilhole and relevant deep gouge geomery on relevant valve body 6 and spool 7, as aperture, deep gouge width and the degree of depth etc., all relevant to the design rated flow of control valve, spool 7 displacement distance l to the right or left depends on the stroke of selected electromagnet 1, has also determined the axial arrangement length of valve body 6 and spool 7.
Claims (7)
1. a digital-to-analogue hybrid directional control valve, comprise valve body and spool, the two ends of described valve body are respectively arranged with end cap, described spool is installed on valve inner, it is characterized in that: the appearance of described valve body top is provided with P hydraulic fluid port, T hydraulic fluid port, A hydraulic fluid port and the B hydraulic fluid port being connected with spill port with oil pump, fuel tank, executive component oil inlet hole respectively, is arranged with one group of e deep gouge and f deep gouge being connected with T hydraulic fluid port with P hydraulic fluid port respectively in the Vertical direction of the internal surface of valve body; The two ends of described spool are stretched out end cap and offset with push rod after penetrating respectively valve core reseting spring, the opposite side of push rod is equipped with electromagnet, on the surface of the upper and lower both sides of spool, be arranged with one group of V-type locating slot, spool circumferential surface Central Symmetry near P hydraulic fluid port offers one group of fan-shaped deep gouge of fan-shaped deep gouge: x, the fan-shaped deep gouge of y, the fan-shaped deep gouge of m and the fan-shaped deep gouge of n, the fan-shaped deep gouge of described m is communicated with the fan-shaped deep gouge of y by p broken line oilhole, and the fan-shaped deep gouge of described x is communicated with by g broken line oilhole and the fan-shaped deep gouge of n.
2. digital-to-analogue hybrid directional control valve according to claim 1, it is characterized in that: in the Vertical direction of the internal surface of described valve body, be also arranged with one group of the first deep gouge and second deep gouge being connected with B hydraulic fluid port with A hydraulic fluid port respectively, spool circumferential surface Central Symmetry near A hydraulic fluid port is separately provided with one group of fan-shaped deep gouge in addition: the first fan-shaped deep gouge, the second fan-shaped deep gouge, the 3rd fan-shaped deep gouge and four fan-shaped deep gouge, described the first fan-shaped deep gouge is communicated with four fan-shaped deep gouge by the first broken line oilhole, described the second fan-shaped deep gouge is communicated with by the second broken line oilhole and the 3rd fan-shaped deep gouge.
3. according to the digital-to-analogue hybrid directional control valve described in claim 1 and 2; it is characterized in that: described valve core inside is along being axially arranged with k slotted hole and q slotted hole along spool; described k slotted hole is by p broken line oilhole and the second broken line oilhole conducting, and described q slotted hole is by g broken line oilhole and the first broken line oilhole conducting.
4. digital-to-analogue hybrid directional control valve according to claim 1; it is characterized in that: the joint of described spool and two end caps is all fixed by axle sleeve; in addition; one end of spool is connected with driven wheel of differential by splined shaft, from mantle tooth, disorderly the drive bevel gear being connected with stepper motor is installed top.
5. digital-to-analogue hybrid directional control valve according to claim 1; it is characterized in that: in described V-type locating slot, be placed with rotation place kick; two surfaces up and down of described valve body are provided with the filling hole being connected with two V-type locating slots respectively; in filling hole, be placed with and the retaining spring that rotates place kick and offset, the top in filling hole is stifled adjusting screw.
6. digital-to-analogue hybrid directional control valve according to claim 1, is characterized in that: described spool circumferential surface is provided with some seal rings.
7. digital-to-analogue hybrid directional control valve according to claim 1; it is characterized in that: described valve body is provided with w " L " type oilhole and w ' " L " type oilhole; described spool is provided with the v vertical oilhole corresponding with w " L " type oilhole and w ' " L " type oilhole difference and the vertical oilhole of v ', on spool, along spool, is radially also provided with i through hole, u through hole, j through hole and o through hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410410476.2A CN104179750B (en) | 2014-08-19 | 2014-08-19 | A kind of numerical model analysis position control valve |
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| CN201410410476.2A CN104179750B (en) | 2014-08-19 | 2014-08-19 | A kind of numerical model analysis position control valve |
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| CN104179750A true CN104179750A (en) | 2014-12-03 |
| CN104179750B CN104179750B (en) | 2016-02-17 |
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| CN104863917A (en) * | 2015-04-01 | 2015-08-26 | 淮海工学院 | Hydraulic flow rate and direction combined control valve driven by AC servo motor |
| CN104948523A (en) * | 2015-05-06 | 2015-09-30 | 淮海工学院 | Hydraulic speed regulating valve with pressure and temperature electric feedback compensation functions and digital display device |
| CN109296573A (en) * | 2018-10-17 | 2019-02-01 | 江苏钧微动力科技有限公司 | A kind of plug-in rotation with conical gear reducer is straight to drive electrohydraulic servo valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863917A (en) * | 2015-04-01 | 2015-08-26 | 淮海工学院 | Hydraulic flow rate and direction combined control valve driven by AC servo motor |
| CN104948523A (en) * | 2015-05-06 | 2015-09-30 | 淮海工学院 | Hydraulic speed regulating valve with pressure and temperature electric feedback compensation functions and digital display device |
| CN104948523B (en) * | 2015-05-06 | 2017-04-19 | 淮海工学院 | Hydraulic speed regulating valve with pressure and temperature electric feedback compensation functions and digital display device |
| CN109296573A (en) * | 2018-10-17 | 2019-02-01 | 江苏钧微动力科技有限公司 | A kind of plug-in rotation with conical gear reducer is straight to drive electrohydraulic servo valve |
| CN109296573B (en) * | 2018-10-17 | 2024-04-12 | 江苏钧微动力科技有限公司 | Plug-in type rotary direct-drive electrohydraulic servo valve with conical gear reducer |
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| Publication number | Publication date |
|---|---|
| CN104179750B (en) | 2016-02-17 |
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