CN102486186B - Valve gear - Google Patents

Abstract

Propose a kind of valve gear (1), it has main valve (4), and this main valve is with valve pocket (12) and be switchably arranged at the main valve part (13) in valve pocket. Valve pocket (12) is communicated with main feed throughs (28a), and this main feed throughs attracts pressure medium to be controlled. Main valve part (13) can switch by the pre-control valve (5) being connected with pre-control feed throughs (22), and this pre-control feed throughs via branch openings (45) from main feed throughs (28a) branch out. In main feed throughs (28a), there is the resistance wall (53) that flows in the downstream of branch openings (45), this resistance wall that flows is responsible for setting up before static pressure at branch openings (45), and the size of this pressure is enough to utilize pre-control valve (5) to switch main valve part (13).

Description

Valve gear

Technical field

The present invention relates to a kind of valve gear, its have at least one main valve and at least one attach troops to a unit in described main valve can electrically-energized pre-control valve, wherein main valve has at least one main valve part, described main valve part is arranged in valve pocket and by controllably applying fluid from pre-control valve aspect and can between the different position of the switch, switches, wherein the main feed throughs of valve gear is passed in valve pocket, described main feed throughs can be passed through the pressure medium of main valve part control for feed-in, wherein send channel branch to go out at least one pre-control feed throughs with branch openings at side from main feed at the stub area that is arranged in valve pocket upstream, described pre-control feed throughs reaches at least one pre-control valve also to described pre-control valve supply pressure medium, pressure medium is for controllably applying fluid to main valve part.

Background technology

This valve gear known by EP0442033A1 has main valve, by two pre-control valves, main valve carried out electronic-pneumatically pre-control, and main valve is arranged on the connector being passed by fluid passage. Main valve is equipped with the valve member that can switch by pre-control valve, and this valve member can axially movably be arranged in valve pocket, and particularly main feed throughs is passed in this valve pocket. Introduce pressure medium by main feed throughs, can carry out controlled pressure medium by means of main valve, to handle connected load by fluid force. Pre-control valve can activate by electricity, and applies the switching signal of fluid can to main valve part, and this switching signal is provided in pre-control feed throughs. For fear of loaded down with trivial details connection measure, not individually but from main feed throughs to pre-control feed throughs supply pressure medium. For this reason, each pre-control feed throughs send channel branch out at side from main feed in the stub area being configured in connector.

It should be noted that the main valve part handoff procedure causing by pre-control valve is easily disturbed, and is not high especially if flow to the pressure of the pressure medium of main feed throughs in the time of known valve gear work. This will be owing to occur injector effect in stub area in the time switching main valve, because this injector effect causes producing Pressure Drop in side branch pre-control feed throughs out, the static pressure that makes here to produce is no longer enough to set up the enough large switching power for main valve part. In fact, particularly, when valve gear is when being in the operating pressure work of lower limit of switching pressure essential for switching main valve part, there will be interference problem.

Thereby in order to address this problem, the current scheme of suing and labouring is to abandon the catenation principle of recording in EP0442033A1, and the pressure medium for pre-control is carried separately. So to a certain extent in outside to pre-control valve supply pressure medium. But this can be extraly need to be on valve gear bindiny mechanism, and in the time that valve gear is installed, need extra connection measure. Although take this extra behave, from outside during to pre-control valve accommodating fluid, user still must consider the relation between operating pressure and pre-control pressure conventionally existing, to ensure reliable handoff procedure.

Summary of the invention

The object of the invention is, take some measures, make with regard to the valve gear of type described in the beginning part, also can ensure that main valve part switches reliably even if operating pressure is little.

In order to realize this object, for the valve gear regulation of type described in the beginning part, in stub area, be provided with the mobile resistance wall of the pressure medium for being fed into main feed throughs, this resistance wall that flows crosses main feed throughs at least in part, and surrounds in this case the branch openings of at least one pre-control feed throughs in the downstream of main feed throughs.

Show, in the region being connected with branch openings at the downstream direction along main feed throughs, due to the resistance wall that flows is linked in main feed throughs, the swabbing effect producing for pre-control feed throughs can reduce significantly. Owing to producing partly stable static pressure in the region of branch openings, at present for send the channel branch injector effect that pre-control feed throughs out produces to reduce significantly from main feed. Dynamic pressure fluctuation in this region is reduced to minimum. Thus, even if it is lower to be fed into the operating pressure of the pressure medium in main feed throughs, also can send channel branch pre-control pressure out to switch reliably main valve part from main feed by utility. Utilize the resistance wall that flows to prevent from being fed into that pressure medium in main feed throughs flows through pre-control feed throughs at high speed is passed into the branch openings in main feed throughs at side. The resistance wall that flows stops fluid stream partly, and dynamic pressure share is reduced to some extent, and this is conducive to static pressure share, and provides enough large switching pressure in pre-control side. Owing to just sending channel branch to go out pre-control pressure from main feed in valve gear inside like this, so the manufacturing cost of valve gear and installation cost can remain in lower level.

Other improvement of the present invention can be obtained by dependent claims.

Advantageously, flow and hinder the part encirclement branch openings of wall along its circumference. It particularly can at least have arc-shaped cross-section in some region at this.

According to a kind of feasible design, the resistance wall that flows transversely particularly passes completely through main feed throughs directly. The resistance wall that flows is preferably fixed on two relative wall sections of conduit wall of main feed throughs at this, is preferably configured to one with this conduit wall. Self-evident, the however structure resistance wall that flows suitably still, making to be fed into pressure medium in main feed throughs can also hinder wall and flow to the valve pocket of main valve through via flow. In order to realize this point, be preferably defined in side and flowing in one or both sides and between resistance wall and the conduit wall of main feed throughs, have enough large through holes for the pressure medium to valve pocket to be conveyed of a cross section.

The resistance wall that flows only partly crosses main feed throughs, and then end freely extend in main feed throughs, and this structure is regarded as advantageous particularly. In this way, the resistance wall that flows only minimally narrows the crossing current cross section of main feed throughs, and the through-current capability of valve gear can not be subject to significant impact.

Useful especially, the resistance wall that flows extend into and in primary flow channel, gets at most channel center. Flow and hinder the preferably even segment distance place termination before the channel center of main feed throughs of wall.

Flow resistance wall through special setting, make it from the section of the encirclement branch openings of the conduit wall of main feed throughs, transverse to longitudinally extending in main feed throughs of main feed throughs.

The resistance wall that flows extend into main feed throughs from the region adjacent with branch openings of the conduit wall of main feed throughs in one direction, this direction is called the longitudinal of resistance wall of flowing, be regarded as useful be, the resistance wall that flows has certain width, and this width makes mobile resistance wall take or block up the cross section of full main feed throughs completely along its whole length. Arrive the fluid of valve pocket thereby can only flow through to flow and hinder the free end face of wall. And be placed in the region of flowing before hindering wall along the updrift side of main feed throughs; produce significant choked flow; conventionally also produce eddy current, this causes existing static pressure in the region of branch openings, and this pressure is only less than the operating pressure that is fed into the pressure medium in main feed throughs slightly.

The guide face that be provided with at least one suitable shape can advantageously to the bottom surface of the updrift side towards main feed throughs of the resistance wall that flows, further supports the fluid supply to pre-control feed throughs thus. Guide face preferably with respect to the axioversion of branch openings stretch. According to the particularly advantageous design at least one guide face, described guide face axially has sloping portion relative free end face from the resistance wall that flows with branch openings, this sloping portion in the direction of branch openings and-overlap ground-towards the downstream direction of main feed throughs.

Particularly when flowing resistance wall when mode extend in main feed throughs freely according to end, advantageously, this resistance wall that flows have the wall section of arc of a centre and two respectively in longitudinal side laterally with the wall section of this arc wall section that be connected, wing projection. Particularly wing wall section can have at it guide face of inclination on the bottom surface of the updrift side of main feed throughs, and this guide face makes in main feed throughs pressure medium that stream comes at least in part towards transverse to the particularly branch openings commutation perpendicular to the longitudinal axis of main feed throughs.

According to a kind of respective design of valve gear, the stub area of pre-control feed throughs is located immediately in main valve or is arranged in the valve chest of main valve. In the time that main valve is worked as independent valve (Einzelventil), be particularly this kind of situation.

Valve gear can, through structure, make it have connector, and this connector is as the supporting body of main valve, and main valve can be pulled down and can fix or be fixed on this connector. Here, stub area completely also can be positioned at main valve inside. But alternatively also can advantageously stub area be arranged in connector. In this case, pre-control feed throughs in connector send channel branch out from main feed, and two feed throughs preferably extend the fitting surface of connector, and main valve can be arranged on this fitting surface, make this main valve both send channel connection with main feed, be communicated with pre-control feed throughs again.

Although there is its concrete embodiment, the resistance wall that flows is preferably constructed integratedly with the conduit wall that limits main feed throughs. This can realize especially simply and manufacturing.

Main valve preferably and at least one pre-control valve be assembled into a valve cell. Pre-control valve is preferably hinged with on main valve in this case detachably. If valve gear has connector, valve cell can be used as construction unit and has installed detachably or be installed on connector.

Brief description of the drawings

Introduce in detail the present invention by accompanying drawing below. Shown in figure:

Fig. 1 is the stereogram of preferred first embodiment of valve gear of the present invention;

Fig. 2 is the top view of observing the connector of the valve gear of Fig. 1 under the state that takes off main valve and pre-control valve along the direction of the arrow II of Fig. 1;

Fig. 3 is the longitudinal section of the valve gear of Fig. 1 and 2 of dissecing along cutting line III-III;

Fig. 4 is the enlarged drawing of the part IV of getting up at Fig. 3 centre circle, and it shows stub area;

Fig. 5 is the sectional elevation dissecing along cutting line V-V of the valve gear of Fig. 2 and 3, wherein not shown main valve;

Fig. 6 is the detailed longitudinal section dissecing along cutting line V-V by the connector of the visible valve gear of Fig. 1 to 5;

Fig. 7 is the longitudinal section that the cutting line VII-VII along Fig. 8 of the connector of another favourable embodiment of valve gear of the present invention is dissectd;

Fig. 8 is the top view that the direction of the arrow VIII along Fig. 7 of the connector of Fig. 7 is observed;

Fig. 9 is the enlarged drawing that encloses the part of coming in Fig. 7 with chain-dotted line, and it shows stub area;

Figure 10 is the sectional elevation that the cutting line X-X along wherein of the connector of Fig. 7 and 8 is dissectd; With

Figure 11 is the longitudinal section of the connector shown in Fig. 7 to 10, and wherein cutting plane is corresponding to the cutting plane of Figure 10.

Detailed description of the invention

In the embodiment of Fig. 7 to 11, the structure of unshowned main valve and pre-control valve is corresponding to the structure of the embodiment of Fig. 1 to 6. Just according to the content described in the main valve of Fig. 1 to 6 and pre-control valve thereby be also correspondingly applicable to the embodiment of Fig. 7 to 11.

Two valve gears that exemplarily illustrate and that all indicate on the whole Reference numeral 1 contain respectively the connector 2 of piece shape or slab structure and the valve cell 3 of pre-control. Valve cell 3 is assembled by main valve 4 and the pre-control valve 5 being installed on main valve 4. The unshowned frame mode of a kind of modification of valve cell 3 has two pre-control valves 5.

Main valve 4 and at least one pre-control valve 5 unification are a valve cell 3, and this is convenient to carrying. But (not shown) be constructed and be arranged at least one pre-control valve 5 also can dividually with main valve 4.

Connector 2 forms the supporting body of valve cell 3. It has the fitting surface 6 for assemble valve cell 3 in removable mode particularly. Fig. 1 and 3 illustrates with the valve gear 1 that is installed on the valve cell 3 on fitting surface 6. In this embodiment for the fixed mechanism 7 of the 7a of Gou Jiao mechanism and bolt fixing mechanism 7b form can be realized under the state being placed on fitting surface 6 valve cell 3 is fixing detachably.

According to the unshowned embodiment of one, valve gear 1 does not have connector 2. At this, valve cell 3 is additionally installed on arbitrary place to use. Frame mode tool with connector 2 has the following advantages, multiple valve gears 1 can be assembled into a member group or valve group (Ventilbatterie) very simply, wherein connector 2 connects in fluid each other, to can realize at central input and output pressure medium.

Main valve 4 has valve chest 8, is configured with valve pocket 12 in this valve chest, accommodates main valve part 13 in this valve pocket. Main valve part 13 can particularly move point-blank in valve pocket 12, carries out motion switch 14 simultaneously. Can make in this way main valve part 13 switch between multiple position of the switch.

The main valve part 13 of this embodiment can be in two position of the switch. Be depicted as first position of the switch, it is in not by the initial position of operation state in the present embodiment, and its implementation is that the back-moving spring mechanism 15 that the other end is supported on valve chest 8 applies power constantly to main valve part 13.

Can take following measure that main valve part 13 is switched to second switch position, that is, the driving face 16 being preferably connected with it regularly coupling be applied to the pressure medium of fluid with its motion. Driving face 16 is preferably positioned on the end face of main valve part 13.

The fluid of driving face 16 is applied and can utilize pre-control valve 5 to control. In this embodiment, this pre-control valve has the function of No. 3/2 valve, and can be by make pre-control service aisle 18 fluidly be connected with pre-control feed throughs 22 or pre-control output channel 23 selectively to the corresponding location of pre-control valve member 17.

Pre-control service aisle 18 extends between the pre-control chamber 24 of pre-control valve 5 and the working chamber 25 of main valve 4, and wherein working chamber 25 is particularly used as the movably driving face 16 of wall and limits.

Give pre-control valve 5 supply pressure media by pre-control feed throughs 22, for the ease of distinguishing, also pressure medium is called to pre-control medium below. Closed position is not existed by under operation state at pre-control valve 5 conventionally, at pre-control valve member 17 during in this closed position, it is by separating pre-control feed throughs 22 and pre-control chamber 24 with contacting of valve seat 26, this pre-control chamber is connected with the pre-control output channel 23 of leading to atmosphere simultaneously, thereby can makes working chamber 25 releases by this pre-control chamber. Main valve part 13 is correspondingly in the first already described position of the switch.

In order to make main valve part 13 in second switch position, pre-control valve 5 electricity that can electrically-energizedly particularly be configured to magnetic valve are activated. For this contact mechanism 27 to pre-control valve 5 applies steering voltage. Consequently, pre-control valve member 17 moves to open position, it separates pre-control output channel 23 and pre-control chamber 24 in this position, simultaneously, because itself and valve seat 26 depart from and pre-control chamber 24 and pre-control feed throughs 22 are coupled together, this pre-control chamber is connected with drive cavity 25 by pre-control service aisle 18.

Now, pre-control medium can flow in drive cavity 25, and sets up therein pressure, and this pressure-acting is in driving face 16 and produce switching power, and this switching power is greater than the reset force of back-moving spring mechanism 15. Consequently, main valve part 13 is displaced to second switch position from first position of the switch.

For main valve part 13 is switched and gets back to first position of the switch, only need again 5 deexcitations of pre-control valve, thereby the pressure producing in drive cavity 25 can reduce via pre-control output channel 23.

In axial spaced position, there are multiple fluid passages 28 to be passed in valve pocket 12, these fluid passages are through the valve chest 8 of main valve 4, and in the situation that there is connector 2, at least one in these fluid passages is also through connector 2. Thereby can make at least one fluid passage 28 only in the valve chest 8 of main valve 4, stretch, and at least one fluid passage 28 has length sections in succession, one of them length sections is configured in connector 2, and ensuing length sections is configured in the valve chest 8 of main valve 4.

A fluid passage in existing fluid passage 28 has formed feed throughs, for the ease of distinguishing, is referred to as main feed throughs 28a below. This fluid passage is connected with pressure source p in the work of valve gear 1, especially compressed gas source of this pressure source, preferably compressed air source. Pressure source p provides the pressure medium of the fluid in certain operating pressure, and is supplied to main valve 4.

At least another fluid passage 28 is as service aisle 28b. On it, can be connected with load to be controlled, the transmission mechanism that for example can handle by fluid force.

28Shi relief passage, another fluid passage 28c, it is connected with the low-lying position of pressure (Drucksenke) in the work of valve gear 1. Carry out work if valve gear 1 is used as the compressed air of pressure medium, as being this kind of situation in this embodiment, relief passage 28c is the venting channels being communicated with atmosphere.

Adopt described at present fluid passage to arrange scheme, can make main valve 4 there is the function of No. 3/2 valve.

Main valve 4 for example has Premium Features. It is configured to No. 5/2 valve at this, and has two other fluid passages 28, and one of them fluid passage forms another service aisle 28e, and another fluid passage forms another relief passage 28f.

For main feed throughs 28a is connected with pressure source p, and for corresponding service aisle 28b, 28e are connected with load to be controlled, be equipped with linkage unit 32 preferably to valve gear 1, for example compressed-air hose of the fluid circuit 33 of drawing from valve gear 1 can be connected with described linkage unit detachably of sealing.

This linkage unit 32 is set also can to when needed relief passage 28c, 28f. If but as in the present embodiment directly by discharge degree to atmospheric pressure, relief passage 28c, 28f are preferably only equipped with silencer 34.

In this embodiment, the function of main valve 4 is now, makes service aisle 28b be connected with main feed throughs 28a in first position of the switch, separates with relief passage 28c simultaneously. Make service aisle 28b be communicated with relief passage 28c in second switch position, and separate with main feed throughs 28a. In the situation that being equipped with No. 3/2 valve, main valve 4 will be confined to this function.

As by as shown in be designed to No. 5/2 valve, additionally make another service aisle 28e be connected with another relief passage 28f in first position of the switch, and separate with main feed throughs 28a. There is being connected of another service aisle 28e and main feed throughs 28a in this external second switch position, and its separates with another relief passage 28f simultaneously.

Can make in this way two service aisle 28b, 28e be applied in selectively pressure medium or the unloaded pressure in operating pressure.

With regard to the valve gear 1 of this embodiment, two service aisle 28b, 28e only stretch in the wall of valve chest 8. And main feed throughs 28a in this embodiment by be called valve passage 34, through the length sections of the wall of valve chest 8 and connected, be called connector passage 35 and form through the length sections of connector 2. Corresponding situation is also applicable to two relief passage 28c, 28f, and wherein, for the ease of distinguishing, in valve chest 8, the length sections of stretching, extension represents with Reference numeral 34a, and the length sections stretching in connector 2 represents with Reference numeral 35a.

Main feed throughs 28a turn up the soil and outwards reach on fitting surface 6 with length sections 35, the 35a space of stretching in connector 2 relief passage 28c, 28f. The relevant length sections 34 stretching in valve chest 8, the basal plane 36 that 34a outwards stretches to valve chest 8, main valve 4 abuts on fitting surface 6 with this basal plane under installment state, wherein port suitably distributes, make they main valve 4 be installed under the state on connector 2 with the length sections 35 stretching in connector 2 of fluid passage 28,35a correctly accordingly (zuordnungsrichtig) aim at.

According to one embodiment not shown further, preferably stretch on the whole in the wall of valve chest 8 main feed throughs 28a and remaining fluid passage 28.

Main feed throughs 28a extends between feeder connection 37 and channel outlet 38. Feeder connection 37 is provided for being connected with pressure source p, is particularly connected with fluid circuit 33 by linkage unit 32, wherein treats that the pressure medium of being controlled by main valve 4 is fed in main feed throughs 28a at feeder connection 37 places. The channel outlet 38 of main feed throughs 28a passes into valve pocket 12, so that being fed in valve pocket 12 from the pressure medium of pressure source p. In main feed throughs 28a inside, flow to channel outlet 38 from the pressure medium of pressure source p from feeder connection 37. Main feed throughs 28a thus have towards the downstream direction 42 of channel outlet 38 and with the updrift side 43 of its opposite direction. These two bearing of trends mark with arrow in the accompanying drawings.

Be fed to pressure medium by main feed throughs 28a to pre-control feed throughs 22, this pressure medium will be served as pre-control medium transport to pre-control valve 5. Branch out pre-control feed throughs 22 at side from main feed throughs 28a at stub area 44 for this reason. Pre-control feed throughs 22 has in its relative with pre-control valve 5 or relative with its pre-control chamber 24 end the access portal that is called branch openings 45, this pre-control feed throughs, that is is passed in main feed throughs 28a at conduit wall 46 places of ambient side that limit main feed throughs 28a at side with described access portal.

Particularly the passage perpendicular to main feed throughs 28a is longitudinal in stub area 44 for branch openings 45.

The opening longitudinal axis 47 of branch openings 45 is perpendicular to the open cross-section of branch openings 45, and this opening longitudinal axis is the best passage longitudinal axis 48 perpendicular to main feed throughs 28a in stub area 44.

If main feed throughs 28a at least has the channel cross-section of rectangle-preferably with the top corner regions of rounding-as being exactly in this embodiment this situation in stub area 44, branch openings 45 is preferably positioned at one of four orthogonal wall sections of conduit wall 46 above, and the open cross-section of branch openings 45 is preferably stretched in a plane.

The branch openings 45 of pre-control feed throughs 22 is passed in main feed throughs 28a in stub area 44, and this stub area is positioned at the upstream of valve pocket 12. Pressure medium thus at it path from feeder connection 37 to channel outlet 38 flow through branch openings 45. In this case, a part of pressure medium is branched off in pre-control feed throughs 22, so as pre-control MEDIA FLOW to pre-control valve 5. This shunting in the accompanying drawings 52 places illustrates with arrow.

Main feed throughs 28a is after downstream direction 42 is arranged in branch openings 45, send channel interior to have a mobile thing that prevents that is called the resistance wall 53 that flows at this main feed, this flow prevent thing prevent the pressure medium of feeder connection 37 places feed-in insusceptibly high velocity stream cross branch openings 45. The resistance wall 53 that flows extends in its passage longitudinal axis 48 in main feed throughs 28a inner transverse, and to applying flow resistance along the mobile pressure medium of downstream direction 42. In this way the dynamic pressure fluctuation often occurring in the region of branch openings 45 partly (punktuell) be converted to stable static pressure. Consequently, the operating pressure applying at feeder connection 37 places is exported as the pre-control pressure for pre-control valve 5 and is not restricted or at least only decline slightly of pressure. In this way, even if also can realize very reliably reliable pre-control function in the situation that operating pressure is little.

In the time switching main valve part 13, can in stub area 52, there is the problem of pressure drop. When before stress-free service aisle 28d or 28e while being connected with main feed throughs 28a, in main feed throughs 28a, can produce high flow rate, in stub area 44, also have relatively high flow rate. But stoping now in the region being directly placed in before branch openings 45 of main feed throughs 28a, the mobile resistance wall 43 that crosses at least partly main feed throughs have fluid to flow, thereby reduce dynamic pressure share, and be conducive to static pressure share, and pre-control medium remains on and is enough to by the power that applies of driving face 16 being caused to the stress level of main valve part 13 from the first switching position switch to second switch position.

In these two embodiment, the resistance wall 53 that flows extends to main feed throughs 28a along the section of the horizontal encirclement branch openings 45 from conduit wall 46 of main feed throughs 28a. The direction that extending in the mobile main feed throughs 28a that hinders wall 53 is called the longitudinal of resistance wall 53 of flowing below, and it extends in the direction identical with opening longitudinal axis 47.

The mobile resistance wall 53 of two embodiment especially aspect its length than the diameter difference to some extent of main feed throughs 28a. Thereby in the embodiment of Fig. 7 to 11, cross main feed throughs 28a completely that is at two of conduit wall 46 toward each other and between relative section between extended peroid at the resistance wall 53 that flows, it only crosses partly main feed throughs 28a in the case of the embodiment of Fig. 1 to 6, and with from branch openings 45 projections front end face 54 ends out freely (freiendend) extend into main feed throughs 28a.

But both of these case also interosculates, that is, the resistance wall 53 that flows surrounds branch openings 45 along a part for its circumference. The resistance wall 53 that flows does not particularly have straight cross section transverse to its longitudinal length, but at least has the bottom section 55 with arc-shaped cross-section in some region, and its recessed side is towards updrift side 43. Thereby in the region of bottom section 55, the resistance wall 53 that flows preferably has bathtub construction, the channel opening of its longitudinal side is towards the pressure medium coming from access portal 37 streams.

The whole cross section of mobile resistance wall 53 can be curved. In the embodiment of Fig. 7 to 11, be for example this kind of situation. The resistance wall 53 that flows is made up of curved section 55 there, and this curved section is preferably designed to circular arc.

The resistance wall 53 that flows also can, through suitably design, make bottom section 55 only occupy a part for transversal profile. For this reason, Fig. 1 to 6 shows a kind of favourable embodiment, wherein the bottom section 55 in the middle of cross section is all connected with the wall section of wing projection two longitudinal sides, and this wall section is called pterion section 56 below, and it is transverse to particularly stretching out perpendicular to opening longitudinal axis 47.

The axial length of pterion section 56 is selected through special, makes it flush and stop with the front end face 54 that hinders wall 53 of flowing, thereby has also specified front end face 54 with together with the end face of bottom section 55.

Branch openings 45 is positioned on the wall section of conduit wall 46, and the resistance wall 43 that flows extends inward into main feed throughs 28a from this wall section, this wall section is called to basic wall section 46a below. Longitudinal relative with the basic wall section 46a wall section transverse to main feed throughs 28a of main feed throughs 28a is called relative wall section 46b below. Two wall sections in two longitudinal sides extensions of the resistance wall 43 that flows between basic wall section 46a and relative wall section 46b of main feed throughs 28a will be called lateral sidewall section 46c, 46d below.

In the embodiment of Fig. 7 to 11, the resistance wall 43 that flows extends towards relative wall section 46b from basic wall section 46a on it is longitudinal, is exactly to extend without interruption. The resistance wall 53 that flows is particularly fixed on these two wall section 46a, 46b. This fixing implementation is especially that the resistance wall 53 that makes to flow is always connected with the conduit wall 46 of main feed throughs 28a integratedly.

If the entity that contains main feed throughs 28a-it is for example made up of plastic material for connector 2-, can in the time that manufacturing it, injection moulding directly construct together inexpensively the resistance wall 53 that flows.

In the embodiment of Fig. 1 to 6, resistance wall 53 a distance before relative wall section 46b of flowing stops. Thereby relative wall section 46b and flow resistance wall 53 between the front end face 54 of this wall section 46b, have a spacer segment.

For same being suitable for of mobile resistance wall 53 of only partly crossing main feed throughs 28a, it is preferably fixed on conduit wall 46 integratedly, and it is only extend in main feed throughs 28a according to the form of wall projection to a certain extent.

In these two embodiment, preferably the resistance wall 53 that flows is arranged to (diametral) at least substantially directly extends in main feed throughs 28a. In the embodiment of Fig. 7 to 11, be exactly to make to flow resistance wall 53 directly through main feed throughs 28a.

Flow resistance when wall 53 in design, make every effort to make the crossing current cross section that provided by main feed throughs 28a as far as possible little on the impact of pressure medium. Thus, the mobile resistance wall 53 that end freely extend in main feed throughs 28a provides advantage, relatively large cross section is provided between its front end face 54 and relative wall section 46b, can to the pressure medium that flow to valve pocket 12. The axial length of mobile resistance wall 53 can be relatively short, makes it particularly extend at most the channel center of main feed throughs 28a. But the front end face 54 of the resistance wall 53 that flows just stops before being preferably in and getting at passage longitudinal axis 48 in stub area 44.

Although flow, resistance wall 53 is shorter, but for the pressure medium of realizing arriving produces best iris action, preferably the resistance wall 53 that flows is designed to its whole length recording in the axial direction of opening longitudinal axis 47 along it takes or the cross section of stifled full main feed throughs 28a. Prevent that by the resistance wall 53 that flows the pressure medium coming from feeder connection 37 streams from flowing through at side thus. Its implementation is for example to make pterion section 56 extend to conduit wall 46 in side direction. Under the concrete condition of this embodiment, two pterion sections 56 all extend to adjacent lateral sidewall section 46c, 46d, and these pterion sections are preferably connected with described lateral sidewall section integratedly.

In the embodiment of Fig. 7 to 11, utilize the longer length of the mobile resistance wall 53 that passes completely through main feed throughs 28a, produce a larger obstruct face to the pressure medium that stream comes. So just can the width design of observing on the cross section of main feed throughs 28a of the resistance wall 53 that flows be obtained smaller, make to leave particularly slot-shaped through hole 57 between each longitudinal side of the resistance wall 53 that flows and lateral sidewall section 46c, the 46d relative with it, the pressure medium that flow to channel outlet 38 from feeder connection 37 can flow through described through hole. Through hole 57 preferably extends along the whole axial length of the resistance wall 53 that flows.

According to the unshowned embodiment of one, only in one of mobile two longitudinal side that hinder wall 53, there is a through hole 57. But in this case advantageously, separately opening 45 not directly but bias stagger and be passed in main feed throughs 28a at side, be for example close to one of lateral sidewall section 46c or 46d. Can give thus the resistance wall 53 that flows transverse to the less width of its longitudinal axis setting, this causes can providing wider through hole 57 to pressure medium in another longitudinal side.

The resistance wall 53 that flows preferably has at least one guide face 58 on the bottom surface of updrift side 43 at it, this guide face makes the pressure medium forcibly changing direction at least partly of coming along downstream direction 42 streams, particularly towards separately opening 45.

The embodiment of Fig. 1 to 6 is equipped with two this guide faces 58. Each guide face is wherein positioned on the bottom surface of each pterion section 56. In Fig. 4, can see, these guide faces 58 stretch obliquely with respect to opening longitudinal axis 47.

Guide face 58 especially can stretch obliquely from front end face 54 freely, and they are extended towards separately opening 45, extends overlappingly along downstream direction 42 simultaneously.

Guide face 58 can be plane, or curved surface.

As particularly seen in Fig. 5 and use as shown in chain-dotted line as optional flexible program in Figure 10, each guide face 58 also can have suitable sloping portion, make it-in the cross section perpendicular to opening longitudinal axis 47, observe-tilt with respect to passage longitudinal axis 48. Tilt condition is through special selection, and guide face 58 is extended along downstream direction 42 towards main feed throughs 28a center in oblique simultaneously.

The described inclination situation of guide face 58 is (ü berlagernd) realization straight from the shoulder overlappingly also.

Utilize in all embodiments selected mobile resistance wall 53 geometries, guarantee that almost whole operating pressures are all used for handling main valve part 13 as pre-control pressure, exactly, in the time there is high flow rate during the handoff procedure of main valve part 13 in stub area 44, also want so. Take the measure that can realize very inexpensively, can ensure in this way the high functional reliability of main valve 4 or whole valve cell 3.

If stub area 44 is configured in the independent connector 2 that is carrying main valve 4, flow and hinder wall 53 thereby realization in connector 2, as being this kind of situation in these embodiments, this main valve 4 is also enjoyed the functional reliability of improvement, and described main valve is not used for the measure of pre-control medium being intervened in inside. But it may be noted that measure of the present invention also realizes in the main feed throughs 28a in the valve chest 8 that extends main valve part 13 or in the length sections of this main feed throughs 28a straight from the shoulder, if stub area 44 is arranged in this valve chest 8.

Especially if supply pre-control medium to multiple pre-control valves 5 from same main feed throughs 28a, main feed throughs 28a can have spaced multiple stub areas 44 it is longitudinal, respectively have a pre-control feed throughs 22 to pass at these stub area places, and these stub areas respectively there is one to attach troops to a unit in the mobile resistance wall 53 that is in the separately opening 45 there.

Multiple separately openings 45 that can have the circumferencial direction along main feed throughs 28a of one or more pre-control feed throughs 22 to be staggeredly arranged in same stub area 44 in addition pass into. So the mobile resistance wall 53 that also can arrange oneself to each separately opening 45 here, and jointly arrange same mobile resistance wall 53 can to multiple separately openings 45. Thereby for example in the embodiment of Fig. 7 to 11, it is upper that separately opening 45 not only can be positioned at basic wall section 46a, and it is upper to be positioned at relative wall section 46b, especially, multiple separately openings 45 transverse to main feed throughs 28a longitudinally toward each other. So connecting same mobile resistance wall 53 along downstream direction 42 on two separately openings 45, this resistance wall that flows laterally passes completely through main feed throughs 28a.

Claims (21)

1. a valve gear, have at least one main valve (4) and at least one attach troops to a unit in described main valve (4) can electrically-energized pre-control valve (5), wherein main valve (4) has at least one main valve part (13), described main valve part is arranged in valve pocket (12) and by controllably applying fluid from pre-control valve (5) aspect and can between the different position of the switch, switches, wherein the main feed throughs (28a) of valve gear (1) is passed in valve pocket (12), the pressure medium that described main feed throughs can be controlled by main valve part (13) for feed-in, wherein branch out at least one pre-control feed throughs (22) with branch openings (45) at side from main feed throughs (28a) at the stub area (44) of the upstream that is arranged in valve pocket (12), described pre-control feed throughs reaches at least one pre-control valve (5) also to described pre-control valve supply pressure medium, pressure medium is for controllably applying fluid to main valve part (13), it is characterized in that, in stub area (44), be provided with the mobile resistance wall (53) of the pressure medium for being fed into main feed throughs (28a), this resistance wall that flows crosses main feed throughs (28a) at least in part, and surround in this case the branch openings (45) of at least one pre-control feed throughs (22) in the downstream of main feed throughs (28a).

2. valve gear as claimed in claim 1, is characterized in that, the resistance wall (53) that flows surrounds branch openings (45) along a part for its circumference.

3. valve gear as claimed in claim 2, is characterized in that, the resistance wall (53) that flows at least has arc-shaped cross-section in some region.

4. valve gear as claimed in claim 1, is characterized in that, the resistance wall (53) that flows crosses main feed throughs (28a) completely, reserves the through hole (57) that at least one authorized pressure MEDIA FLOW is crossed simultaneously.

5. valve gear as claimed in claim 1, is characterized in that, the resistance wall (53) that flows is directly through main feed throughs (28a).

6. valve gear as claimed in claim 4, is characterized in that, has a through hole (57) for the pressure medium to valve pocket (12) to be conveyed at side between mobile resistance wall (53) and the conduit wall (46) of main feed throughs (28a).

7. valve gear as claimed in claim 1, is characterized in that, flow resistance wall (53) only partly cross main feed throughs (28a), and according to end freely mode extend in main feed throughs (28a).

8. valve gear as claimed in claim 7, it is characterized in that, flow resistance wall (53) from the section of the encirclement branch openings (45) of the conduit wall (46) of main feed throughs (28a), transverse to longitudinally extending in main feed throughs (28a) of main feed throughs (28a).

9. valve gear as claimed in claim 7 or 8, is characterized in that, the resistance wall (53) that flows extend into main feed throughs (28a) along the longitudinal from the fringe region of branch openings (45).

10. valve gear as claimed in claim 1, is characterized in that, the resistance wall (53) that flows has at least one guide face (58) on the bottom surface of its updrift side towards main feed throughs (28a) (43).

11. valve gears as claimed in claim 1, it is characterized in that, the resistance wall (53) that flows has at least one guide face (58) on the bottom surface of its updrift side towards main feed throughs (28a) (43), this guide face has sloping portion from the free end face that deviates from branch openings (45) (54) of the resistance wall (53) that flows, and this sloping portion extends towards the downstream direction (42) of main feed throughs (28a) in the direction of branch openings (45) and simultaneously.

12. valve gears as claimed in claim 1, it is characterized in that, the resistance wall (53) that flows have a centre arc wall section (55) with two respectively in longitudinal side laterally with wall section (55) the wall section that be connected, wing projection (56) of this arc.

13. valve gears as claimed in claim 1, it is characterized in that, it has connector (2), main valve (4) can be pulled down and can fix or be fixed on this connector, wherein main feed throughs (28a) is partly extended in connector (2), partly in the valve chest that contains valve pocket (12) (8) of main valve (4), extends.

14. valve gears as claimed in claim 6, is characterized in that, the resistance wall (53) that flows is constructed integratedly with the conduit wall (46) that limits main feed throughs (28a).

15. valve gears as claimed in claim 13, it is characterized in that, main valve (4) is assembled into a valve cell (3) with at least one pre-control valve (5), wherein stub area (44) is positioned at the inside of main valve (4), or be arranged in the connector (2) that belongs to valve gear (1), valve cell (3) can be pulled down and can fix or be fixed on this connector.

16. valve gears as claimed in claim 4, is characterized in that, described mobile resistance wall is fixed in the mode of one on the relative wall section (46a, 46b) of conduit wall (46) of main feed throughs (28a).

17. valve gears as claimed in claim 6, is characterized in that, described through hole is positioned at the both sides of the resistance wall (53) that flows.

18. valve gears as claimed in claim 9, is characterized in that, described mobile resistance wall takes the cross section of main feed throughs (28a) along its whole length.

19. valve gears as claimed in claim 10, it is characterized in that, described guide face with respect to the fore-and-aft tilt of main feed throughs stretch, wherein have the sloping portion tilting with respect to the opening longitudinal axis (47) vertical with the open cross-section of branch openings (45).

20. valve gears as claimed in claim 12, is characterized in that, the wall section (56) of described wing projection has respectively the guide face (58) of inclination on the side of its updrift side towards main feed throughs (28a) (43).

21. valve gears as claimed in claim 13, is characterized in that, are arranged in the length sections that extends connector (2) of main feed throughs (28a) for the described stub area (44) of pre-control feed throughs (22).