CN103775416A - Valve system - Google Patents
Valve system Download PDFInfo
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- CN103775416A CN103775416A CN201310494022.3A CN201310494022A CN103775416A CN 103775416 A CN103775416 A CN 103775416A CN 201310494022 A CN201310494022 A CN 201310494022A CN 103775416 A CN103775416 A CN 103775416A
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- Prior art keywords
- valve
- piston
- main
- valve system
- main piston
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
- F15B13/0435—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the pilot valves being sliding valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
- F15B2211/328—Directional control characterised by the type of actuation electrically or electronically with signal modulation, e.g. pulse width modulation [PWM]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/8606—Control during or prevention of abnormal conditions the abnormal condition being a shock
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
The valve device has a main stage (1) with a main piston (18), and control electronics through which shorter and longer electric pulses (26,28) can be generated by the main piston. An opening stroke with a short duration can be produced, due to the generation of electric pulses. The reversal position is spaced from an end position of the main piston. The main piston is designed such that a quantity-way characteristic of the switching-way valve is hop-free and steady.
Description
Technical field
The present invention relates to a kind of according to the valve system as described in the preamble of claim 1.
Background technique
By prior art known proportion selector valve, its valve body can also occupy neutral position except operating position and open position, only partially opens through flow cross section in neutral position.Therefore can in this selector valve, manipulate through-current capacity.Drawback is the device technique cost of this selector valve.
The valve that can regulate is disclosed in open source literature DE 10 2,010 045 504 A1, its valve body can occupy on positi and in addition can pulsed or impact type move, the short time is opened valve thus.This opening moved or opens stroke repeatedly.Can also realize the through-current capacity reducing with respect to opening completely by this so-called trajectory pattern (ballistischer Modus), can manipulate thus directly actuated valve.
In addition, in document DE 10 2,009 052 285 A1, also disclose digital hydraulic valve system, it has the parallel distributing valve (Schaltventil) of arranging mutually of multiple different sizes.Described distributing valve is opened with different combinations simultaneously, thus digital hydraulic valve system is obtained the opening cross-section of adduction.In order to make the classification of opening cross-section obtained, valve system or volume flowrate level and smooth, directly actuated equilibrium valve is proposed.Described equilibrium valve can be in ballistic method in rapid succession the short time open, and do not need valve body to reach the final position that it is opened.
The drawback of this ballistic valve is, described valve correspondingly forms hydraulic pressure opening and impacts in the time that it is opened, described opening impact due to open and close motion or stroke movement continue repeatedly produce the load of the hydraulic system connecting and produce in addition undesirable running noises via pressure peak.
Summary of the invention
In contrast, task of the present invention is, a kind of valve system with ballistic selector valve is provided, and has avoided pressure peak and reduced its running noises in described selector valve.
This task solves by the valve system with feature claimed in claim 1 or feature claimed in claim 2.
The first deformation program of valve system required for protection has directly actuated distribution selector valve and manipulation electronic equipment, and described distribution selector valve is made up of the main with main piston, can produce electrical pulse by described manipulation electronic equipment.On main piston, form short pratial stroke of endurance by described pulse, final position or the stop member of the main piston on its backward position and main casing have spacing.Like this described main piston of structure according to the present invention is without impacting and stably thereby make amount-displacement characteristic curve of described main.Make thus supplied with system not be hit and low-load.Described selector valve and described system produce less noise.
The second deformation program of valve system required for protection has the distribution selector valve of pilot control (Vorsteuern); described distribution selector valve has with the main of main piston with the pilot stage of guide piston and manipulation electronic equipment, can form electrical pulse by described manipulation electronic equipment.Can be on guide piston and be connected on and on main piston, form respectively short pratial stroke of endurance by described pulse, corresponding final position and the stop member of the corresponding piston on its corresponding backward position and corresponding housing (guide's housing or main casing) have spacing.The so described main piston of structure and/or guide piston according to the present invention are without impacting and stably thereby make amount-displacement characteristic curve of corresponding stage.In the time of described guide piston constructed according to the invention, in main, be not hit and low-load.The selector valve of described pilot control produces less noise.In the time of main piston constructed according to the invention, the system of supplying with is not hit and low-load.Described selector valve and the system of supplying with produce less noise.Preferably so construct pilot stage and main according to the present invention, thereby make the selector valve of pilot control not produce impact and fluctuate and cause minimum noise.
According in two of valve system of the present invention deformation programs, " pratial stroke " refers to that piston does not reach in its final position and described level is not opened completely.Described " final position " refers to that position that described level is at utmost opened of piston." amount-displacement characteristic curve " refers to the stroke of volume flowrate and piston or the relation curve of displacement.
Other favourable technological schemes of the present invention have also been described in the dependent claims.
In preferred technological scheme, described main is guiding valve (Schieber-ventil).Described amount-displacement characteristic curve can have in the first opening procedure to be zero gradient and steadily to rise subsequently.Thus, in the opening procedure of main and opening in the ensuing curve of stroke and avoiding fluctuation.
Alternatively or addedly, described (the second deformation program) pilot stage can be guiding valve.Described amount-displacement characteristic curve can have in the first opening procedure to be zero gradient and steadily to rise subsequently.Thus, in the opening procedure of pilot stage and opening in the ensuing curve of stroke and avoiding fluctuation.
In preferred technological scheme, on described guide piston and/or main piston, construct at least one and control seamed edge, on described control seamed edge, be provided with cone, the direction observation of opening that described cone is in reverse to piston has the cross section that continues to reduce.Described cone can be configured to linear gradient.Described cone can also have parabolical shape in sectional view, wherein from the widest portion's section of piston, continues to increase reposefully with the spacing of the extendible portion of the imagination of described portion section.
In preferred technological scheme, at described guide piston and/or be provided with at least one control seamed edge on main piston, described control seamed edge is interrupted by least one recess.Described recess starts to observe and have the cross section that continues to reduce along the movement direction of piston from controlling seamed edge.For cross section changes the degree of depth (roughly along piston radially) that the width of the described recess tangent direction of piston (roughly along) and described recess are provided.Preferably, be provided with multiple recesses that are distributed on the periphery that is also distributed in thus piston on the periphery of controlling seamed edge.
When (observing along piston movement direction) described pratial stroke is while being less than the length of recess, even if also can not form the annular space as open cross-section in the time reaching backward position, but pressure medium must flow through described recess in opening stroke completely whole.Can change and form and determine on the whole amount-displacement characteristic curve stably by above-mentioned cross section subsequently.
Even when measure stably according to the present invention-displacement characteristic curve is being opened also can keep in stroke time, the wherein said stroke of opening is opened complete annular space or annular as open cross-section, described recess must be distributed in the width of controlling on the periphery of seamed edge and/or having increase in large quantities, thereby described recess and described control seamed edge is joined or transformation each other.
Cross section changes as following manner realization stably, and described recess is triangular groove or V-shaped groove.
According in (described two deformation programs) applicable cases of valve system of the present invention, main is 3/4 selector valve, and described 3/4 selector valve has a pump joint, a storage tank joint and two working joints.Between described pump joint and each working joint, strictly say between the pressure chamber of attaching troops to a unit at it, in the operating position at the center of main piston, be correspondingly provided with and just covering folded (ü berdeckung).Thus, valve system according to the present invention is without leaking and being particularly suitable for that position regulation is carried out in load to being supplied with by described valve or orientation regulates.
According in (the second deformation program) applicable cases of valve system of the present invention, pilot stage is 3/4 selector valve, described 3/4 selector valve has a pump joint, a storage tank joint and two control joints, wherein between described pump joint and each control joint, strictly say between the pressure chamber of attaching troops to a unit at it, in the operating position at the center of guide piston, be correspondingly provided with negative cover folded.
Especially preferably above-mentioned two applicable cases are carried out to combination.At this, the control joint of described pilot stage is connected in the distolateral pilot pressure chamber being arranged on main piston with the corresponding of main.Obtain thus the leakage from the pump joint of pilot stage to pilot pressure chamber, thereby made the motion (for example main piston carries out centering by spring in its home position) of main piston can not cause the no load running of control channel.
Preferably, described amount-displacement characteristic curve is quadratic equation, for example Q(x)=x
2, wherein Q=volume flowrate, and x=stroke or displacement.
Described main and/or pilot stage can also be valve seat-slide core-valve (Sitz-Schieber-Ventil).
So design and adjust described valve system, thereby being caused until definite rollback point and there is the pratial stroke of definite endurance of pilot stage in the reproducible pulse duration.Make thus the pilot pressure MEDIA FLOW of measured amount to main, thereby main is implemented until definite rollback point and have the pratial stroke of definite endurance.Make thus valve system according to the present invention within the reproducible pulse duration, allow predetermined pressure medium amount to pass through.Therefore can be for example can reappear by 70% the pratial stroke that accounts for its full stroke of guide piston 20% the pratial stroke that accounts for its full stroke that forms main piston.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated.Wherein:
Fig. 1 shows according to the sectional view of the distribution selector valve of the embodiment's of valve system of the present invention pilot control;
Fig. 2 shows according to the plotted curve of the stroke of the guide piston of valve system of the present invention or displacement and the relation between the pulse duration;
Fig. 3 shows stroke or the displacement time history plot of cylinder guide piston, main piston and that supplied with by described selector valve;
Fig. 4 shows the cut-away view of the pilot stage of distributing selector valve;
Fig. 5 shows the cut-away view of the main of distributing selector valve; And
Fig. 6 shows amount-displacement characteristic plotted curve of embodiment's main.
Reference numerals list
1 main
2 pilot stage
4 guide pistons
6 (pilot stage) longitudinal axis
8 guide's housings
10a (pilot stage) the first Returnning spring
10b (pilot stage) the second Returnning spring
The first magnet case of 12a first
The first magnet case of 12b second
14 main casings
16 (main) longitudinal axis
18 main pistons
20a the first pilot pressure chamber
20b the second pilot pressure chamber
22a (main) the first Returnning spring
22b (main) the second Returnning spring
24a the first pressure control channel
24b the second pressure control channel
26 compared with short burst
28 compared with long pulse
30 less and shorter strokes
32 more greatly and longer stroke
34 (guide piston) stroke or displacement diagrams
36 (main piston) stroke or displacement diagrams
38 (guide piston) pratial stroke
40 (main piston) pratial stroke
42 strokes or displacement diagram
44 initial positions
46 (piston) final position
48 sealed department sections
50 (guide piston) flattened portion
52 cones
54 V-shaped grooves
56 grooves
58 (guide piston) control channel
60 (main piston) control channel
(main piston) between 62 A/B and T just covering folded
(main piston) between 64 P and A/B just covering folded
66 volume flowrates
68 volume flowrates
P'(pilot stage) pump joint
A', B'(pilot stage) control channel
T'(pilot stage) storage tank joint
P (main) pump joint
A, B (main) working joint
T (main) storage tank joint.
Embodiment
Fig. 1 shows the cross sectional view of distributing the embodiment of selector valve according to the ballistic of the pilot control of valve system of the present invention.This selector valve has main 1 and pilot control level or pilot stage 2.Described pilot stage 2 has pilot control piston or guide piston 4, and described guide piston is illustrated in Fig. 1 in its home position or operating position.Described guide piston 4 can move along both direction along longitudinal axis 6.For this reason described guide piston 4 in the housing of guide's controlled stage or guide's housing 8 by two Returnning spring 10a, 10b that longitudinally axle 6 acts on by pretension in its home position or operating position and can be so mobile by two first magnet case 12a, 12b, thereby make pump joint P' be connected with the first control channel A' of pilot stage 2 or be connected with the second control channel B' of pilot stage 2.Corresponding other control channel A' or B' unload towards storage tank joint at this.
Described pilot stage 2 is fixed on the main casing 14 of main 1 by its housing 8, and main piston 18 is movably received within described main casing along longitudinal axis 16.Figure 1 illustrates the main piston 18 in its home position or operating position, in described position, pump joint P is with respect to two working joint A, B locking.Two pilot pressure chamber 20a, 20b that relatively work are constructed main piston 18 distolateral, in described pilot pressure chamber, held respectively Returnning spring 22a, 22b, described Returnning spring is supported on main casing 14 and makes main piston 18 pretensions in home position or operating position.
One of each pilot pressure chamber 20a, 20b two control channel A', B' by pilot pressure passage 24a, 24b and pilot stage 2 are connected.By can mobile main piston 18 like this to the one-sided Loading Control pressure medium of pilot pressure chamber 20a, 20b, thereby pump joint P be connected with in two working joint A, B one.Corresponding other working joint A or B unload towards storage tank joint T at this.
In the time of valve system operation according to the present invention, for example pump joint P should be connected with the working joint A of main 1.For this, described the first first magnet case 12a is switched on, sees Fig. 1 thereby make described the first first magnet case overcome the second Returnning spring 10b() power guide piston 4 is moved right.Described pump joint P' is connected with control channel B' thus, thereby makes pilot pressure medium enter into pilot pressure chamber 20b by the second pilot pressure passage 24b.Thus, described main piston overcomes the first Returnning spring 22a(and sees Fig. 1) power to left movement, thereby pump joint P is connected with working joint A.Make working joint B unload towards storage tank joint T simultaneously.
The distribution selector valve pulsed of described pilot control or the operation of ballistic ground.For this reason, used (unshowned) amplifier, described amplifier loads a series of rush of current to two first magnet case 12a, 12b.Fig. 2 shows stroke or the graph of relation in displacement and pulse duration of guide piston 4, and the described pulse duration one of is delivered in two magnet 12a, 12b by amplifier.At this, figure 2 illustrates two embodiments.In the first embodiment, described amplifier has loaded relatively short current pulse 26 to first magnet case 12a, 12b.On guide piston 4, form thus relatively little and short stroke 30.When current pulse 28 on magnet case 12a, 12b is longer in the ban, on guide piston 4, form relatively larger and longer stroke 32 of endurance.Described two strokes 30,32 start and end in the home position or operating position of the guide piston 4 shown in Fig. 1.Short time open pilot stage 2 by transition ground, utilize the pressure medium of corresponding short time to promote main piston 18 to be transported in one of two pilot pressure chamber 20a, 20b, thereby make the deflection in short time of described main piston and open the corresponding connection of control (aufsteuern) from compression fittings P to one of working joint A, B.
Fig. 3 shows the stroke of guide piston 4 or the exemplary curve of displacement diagram 34 and stroke or the displacement diagram 36 of the main piston 18 that forms thus.In this embodiment, first one of first magnet case 12a, 12b are switched on relatively longways, thereby make guide piston 4 remain within a certain period of time (100% guide piston) in its final position.The response of main piston 18 be in time stagger and equally main piston 18 is remained within a certain period of time to (100% main piston) in its final position.
Subsequently, in time graph to first magnet case 12a, 12b with the endurance pulsed that constantly reduces switch on four times, thereby make guide piston 4 implement to have four pratial strokes 38 of the stroke that (with by a small margin) reduce.Show stroke or the displacement diagram 36 of main piston 18, the pratial stroke 40 that described main piston staggered on four times of same enforcement and (with by a larger margin) reduces for this reason.Each pratial stroke 40 of main piston 18 causes certain oil mass to be shifted out by working joint A, the B of main 1.
Fig. 3 shows stroke or the displacement diagram 42 of (the unshowned cylinder) piston being connected on working joint A, B in addition.Shown in time graph move to final position 46 by continuing that energising makes piston near initial position 44 moves to final position 46 and there is with four the movement step that reduces value by four pulses with the endurance reducing subsequently while starting.Utilize and realized by this way orientation adjusting according to valve system of the present invention.
Fig. 4 shows the cut-away view of pilot stage 2.At this, described guide's housing 8 and guide piston 4 only illustrate being connected to pressure chamber on pump joint P' and being connected in the region of the pressure chamber on control channel A' or B'.Pilot stage 2 between described two pressure chambers, have respectively negative cover folded, thereby even also provide pilot pressure medium for filling two pilot pressure chamber 20a, 20b in the home position of guide piston 4 or operating position.Described negative covering folded by flattened portions on multiple peripheries that are distributed in sealed department section 48, that form by milling (Abflachung) 50 formations.Described flattened portion extends to and controls seamed edge 58 and extend in the cone 52 being adjacent from the groove 56 of guide piston 4.Thus, can flowing to constantly two control channel A', B' from pump joint P' of pilot pressure medium and so on.
In described guide piston 4(Fig. 4) opening in stroke (pratial stroke or full stroke) to the right, circumferentially complete and continue to increase and open the pressure medium of controlling from pump joint P' to control channel A' or B' and connect and offside is unloaded towards T' by cone 52.Realize lasting volume flowrate growth and realized thus the soft shock-free manipulation to main piston 18 by the cone 52 of described guide piston 4.
Fig. 5 shows the cut-away view of main 1, and described main has its main casing 14 and its main piston 18.At this, described main piston 18 is shown in the region of the pressure chamber being connected with working joint A or B, and wherein adjacent to described pressure chamber, a side has arranged that the pressure chamber and the opposite side that are connected with storage tank joint T arranged the pressure chamber being connected with pump joint P.In the home position of (shown in Fig. 5) main piston 18 or operating position, be provided with pressure chamber A/B on the one hand with respect to pressure chamber T and folded with respect to just covering of pressure chamber P on the other hand.Make thus the leakage of main 1 minimize, thereby can not make to be supplied with and the load of carrying out orientation adjusting is moved by working joint A/B.
Even for supplied with load also can realize soft shock-free running with velocity curve stably under pulsed according to the present invention operation, on the one hand, between working joint A/B and storage tank joint T and arranged respectively on the other hand four recesses that are evenly distributed on periphery between working joint A/B and pump joint P, described recess is made up of triangular groove or V-shaped groove 54.Its cross section continues to increase towards corresponding control seamed edge 60.
Fig. 6 shows the relation between the volume flow Q (unit is l/min) of main 1 and the stroke of its main piston 18 or displacement (unit is mm).The volume flowrate 66 that described amount-displacement characteristic curve shows the in the situation that of negative stroke movement from pump joint P to working joint A or B increases, and it shows the volume flowrate 68 increasing to storage tank joint T from working joint A or B in the situation that of positive-stroke.At this, since zero point first correspondingly short essay also volume flowrate is not exerted an influence because in main 1, realized respectively two joints just covering folded 62 or 64(with reference to Fig. 5).After described short stroke, volume flowrate 66 or 68 is quadratic power and increases.Realized thus main 1 according to the curve of amount-displacement characteristic stably of the present invention. according in the running of valve system of the present invention, the state of main 1 continuously repeats since zero point along amount-displacement characteristic curve and returns.
The invention discloses a kind of valve system that ballistic distributes selector valve that has, described distribution selector valve repeats by current pulse and opens in short time.Described distribution selector valve or (according to the first deformation program) are directly controlled, or (according to the second deformation program) carries out pilot control.Main and especially its main piston and/or pilot stage and especially its guide piston are so designed and can so move in the corresponding housing of corresponding stage, are stably thereby make described amount-displacement characteristic curve.Pressure surge in the ballistic load of avoiding distributing selector valve inside and/or supplied with by described selector valve in service thus.
Claims (15)
1. valve system, described valve system has directly actuated distribution selector valve and manipulation electronic equipment, described distribution selector valve is made up of the main (1) with main piston (18), can produce electrical pulse (26 by described manipulation electronic equipment, 28), by described pulse can described main piston (18) upper form the endurance short open stroke (40), final position or the stop member of its backward position and described main piston (18) have spacing, it is characterized in that, so described main piston of structure (18), thereby the amount-displacement characteristic curve that makes described distribution selector valve be without impact and stably.
2. valve system, described valve system has distribution selector valve and the manipulation electronic equipment of pilot control, described distribution selector valve has with the main (1) of main piston (18) with the pilot stage (2) of guide piston (4), can produce electrical pulse (26 by described manipulation electronic equipment, 28), by described pulse can be at described guide piston (4) upper and indirectly described main piston (18) upper form the endurance short open stroke (38, 40), its backward position and corresponding piston (4, 18) final position or stop member have spacing, it is characterized in that, the so described main piston of structure (18) and/or described guide piston (4), thereby make corresponding stage (1, 2) amount-displacement characteristic curve (62, 64, 66, 68) be without impact and stably.
3. valve system according to claim 2, wherein said pilot stage (2) is guiding valve.
4. according to the valve system described in any one in the claims, wherein said main piston (1) is guiding valve.
5. according to the valve system described in any one in claim 2 to 4, wherein at the upper structure of described guide piston (4), at least one controls seamed edge (58), is provided with the cone (52) with the cross section that continues to reduce on described control seamed edge.
6. according to the valve system described in any one in the claims, wherein on described main piston, construct at least one and control seamed edge, on described control seamed edge, be provided with the cone with the cross section that continues to reduce.
7. according to the valve system described in any one in claim 2 to 4, wherein on described guide piston, construct at least one and control seamed edge, on described control seamed edge, be provided with at least one and have the recess of the cross section that continues to reduce.
8. according to the valve system described in any one in the claims, wherein at the upper structure of described main piston (18), at least one controls seamed edge (60), is provided with at least one recess with the cross section that continues to reduce (54) on described control seamed edge.
9. according to the valve system described in claim 7 or 8, wherein saidly open the length that stroke (40) is less than described recess (54).
10. according to the valve system described in any one in claim 7 to 9, wherein said at least one recess is triangular groove or V-shaped groove (54).
11. according to the valve system described in any one in the claims, wherein said main (1) is 3/4 selector valve, described 3/4 selector valve has a pump joint (P) and two working joints (A, B), and wherein between described main piston (18) and main casing (14), between described pump joint (P) and each working joint (A, B), be provided with just cover folded.
12. according to the valve system described in any one in claim 2 to 11, wherein said pilot stage (2) is 3/4 selector valve, described 3/4 selector valve has a pump joint (P') and two control joints (A', B'), and wherein between described guide piston (4) and guide's housing (8), between described pump joint (P') and each control joint (A', B'), be provided with negative cover folded.
13. according to the valve system described in any one in the claims, and wherein said amount-displacement characteristic curve is quadratic equation.
14. valve systems according to claim 2, wherein said pilot stage is valve seat-slide core-valve.
15. valve systems according to claim 1 and 2, wherein said main is valve seat-slide core-valve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210020580 DE102012020580A1 (en) | 2012-10-22 | 2012-10-22 | Valve arrangement has main stage with main piston which is designed such that quantity-way characteristic of switching-way valve is hop-free and steady |
| DE102012020580.5 | 2012-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103775416A true CN103775416A (en) | 2014-05-07 |
Family
ID=50436743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310494022.3A Pending CN103775416A (en) | 2012-10-22 | 2013-10-21 | Valve system |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103775416A (en) |
| DE (1) | DE102012020580A1 (en) |
| IT (1) | ITMI20131725A1 (en) |
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| CN202144806U (en) * | 2011-07-11 | 2012-02-15 | 上海立新液压有限公司 | Piston-controlled reversal valve |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009052285B4 (en) | 2009-11-09 | 2020-10-15 | Robert Bosch Gmbh | Digital hydraulic valve |
| DE102010045504A1 (en) | 2010-09-15 | 2012-03-15 | Robert Bosch Gmbh | Method for controlling a ballistic movement of a blocking body of a valve |
-
2012
- 2012-10-22 DE DE201210020580 patent/DE102012020580A1/en not_active Withdrawn
-
2013
- 2013-10-17 IT ITMI20131725 patent/ITMI20131725A1/en unknown
- 2013-10-21 CN CN201310494022.3A patent/CN103775416A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137336A (en) * | 1997-07-23 | 1999-02-12 | Tokimec Inc | Pilot operation type high-speed directional control valve |
| CN101389869A (en) * | 2006-02-21 | 2009-03-18 | 罗伯特-博世股份公司 | Control device and hydraulic pilot control |
| CN201047366Y (en) * | 2007-04-19 | 2008-04-16 | 广州机械科学研究院 | Fast hopping and slow reversing electric or hydraulic operated change valve |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102012020580A1 (en) | 2014-04-24 |
| ITMI20131725A1 (en) | 2014-04-23 |
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