EP2461045B1 - Agencement de vannes - Google Patents

Agencement de vannes Download PDF

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Publication number
EP2461045B1
EP2461045B1 EP10015192A EP10015192A EP2461045B1 EP 2461045 B1 EP2461045 B1 EP 2461045B1 EP 10015192 A EP10015192 A EP 10015192A EP 10015192 A EP10015192 A EP 10015192A EP 2461045 B1 EP2461045 B1 EP 2461045B1
Authority
EP
European Patent Office
Prior art keywords
valve
main feed
main
wall
feed passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10015192A
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German (de)
English (en)
Other versions
EP2461045A1 (fr
Inventor
Tillmann Seiffer
Robert Hesser
Radu Ghimpu-Mundinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Festo SE and Co KG filed Critical Festo SE and Co KG
Priority to ES10015192T priority Critical patent/ES2403078T3/es
Priority to EP10015192A priority patent/EP2461045B1/fr
Priority to CN201110392664.3A priority patent/CN102486186B/zh
Publication of EP2461045A1 publication Critical patent/EP2461045A1/fr
Application granted granted Critical
Publication of EP2461045B1 publication Critical patent/EP2461045B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F15B13/0431—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 electrical control resulting in an on-off function
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0871—Channels for fluid
    • 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
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0405—Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves

Definitions

  • the invention relates to a valve arrangement, comprising at least one main valve and at least one main valve associated, electrically actuated pilot valve, wherein the main valve at least one arranged in a valve chamber, controlled by the pilot valve Fluidbeaufschlagung switchable between different switching positions main valve member, wherein in the valve chamber to a At least one leading to the at least one pilot valve and this supplying with the pressure medium used for the controlled fluid loading of the main valve member supplying pilot feed channel branches off laterally with a branch opening from the main feed channel controllable pressure medium serving main feed channel of the valve assembly ,
  • One from the EP 0 442 033 A1 known valve arrangement of this type has a means of two pilot valves electropneumatically pilot-controlled main valve, which is mounted on a penetrated by fluid channels connector body.
  • the main valve is equipped with a switchable by the pilot valves valve member, which is housed axially movable in a valve chamber into which, among other things, opens a main feed channel.
  • the pressure medium is introduced via the main feed channel, which is achieved by means of the main valve is controllable to actuate a connected consumer by means of fluid power.
  • the pilot valves are electrically activatable and are capable of imparting to the main valve member a fluidic switching signal provided in a pilot feed channel.
  • the pilot feed channel is not supplied separately with pressure medium, but from the main feed channel.
  • each pilot feed duct is branched off laterally from the main feed duct in a branch region formed in the connection body.
  • the invention has for its object to provide measures that ensure a reliable switching of the main valve member in a valve assembly of the type mentioned even at low working pressures.
  • a valve arrangement of the type mentioned that in the branch region a main feed channel at least partially crossing while the branch opening of the at least one pilot feed channel flanking on the downstream side of the main feed channel flow dam wall is arranged for the fed into the main feed channel pressure medium.
  • the pressure medium fed into the main feed duct is prevented by the flow stow wall from flowing past the branch opening of the pilot feed duct which opens laterally into the main feed duct at high speed.
  • the flow damper wall accumulates the fluid flow locally, so that the dynamic pressure component is reduced in favor of the static pressure component and a sufficiently high switching pressure is provided on the pilot control side.
  • the flow blocking wall framed the branch opening along part of its circumference.
  • it may in particular have an arcuate cross-section at least in some areas.
  • the main feed channel is penetrated by the flow restriction wall in the transverse direction and in particular diametrically completely.
  • the flow dam wall is expediently attached to two opposite wall sections of the channel wall of the main feed channel and preferably formed integrally with this channel wall.
  • the flow restriction wall is to be designed in such a way that the pressure medium fed into the main feed channel still has the possibility of passing through the flow blocking wall and flowing to the valve chamber of the main valve.
  • a Through opening sufficiently large cross section for the valve chamber to be supplied pressure medium is present.
  • a construction in which the flow blocking wall only partially traverses the main feed channel and thus protrudes freely into the main feed channel is considered to be particularly advantageous. In this way, the flow cross section of the main feed channel is minimally narrowed by the flow restriction wall and the flow rate of the valve assembly is not affected relevant.
  • the flow restriction wall extends maximally to the middle of the channel into the main flow channel. Conveniently, it even ends a little way in front of the middle of the channel of the main feed channel.
  • the flow blocking wall is in particular arranged such that, starting from a section of the channel wall of the main feed channel framing the branch opening, it extends into the main feed channel transversely to the longitudinal direction of the main feed channel.
  • the flow stow wall has a width such that it completely occupies or fills the cross-section of the main feed channel over its entire length. Consequently, the flow reaching the valve chamber can only flow past the free end face of the flow restriction wall.
  • the region upstream of the flow restriction wall in the upstream direction of the main feed channel there is a considerable increase Flow congestion and usually also creates turbulence, which means that there is a static pressure in the region of the branch opening, which is only slightly lower than the working pressure of the fed into the main feed channel pressure medium.
  • the flow stow wall with at least one suitably shaped flow guide surface at its underside oriented in the upstream direction of the main feed duct.
  • This flow guide expediently has an inclined course relative to the axial direction of the branch opening.
  • Particularly advantageous is a pertinent design of at least one flow guide, that selbige starting from one of the branch opening axially opposite free end face of the Strömungsstauwand has a skew, which is oriented in the direction of the branch opening and - superimposed on it - in the downstream direction of the main feed channel.
  • the Strömungsstauwand projects freely ending in the main feed channel, it is advantageous if it has a central, arcuate wall portion, and two adjacent each at a longitudinal side of this arcuate wall section subsequent, wing-like projecting wall sections.
  • the wing-like wall sections may have at their oriented in the upstream direction of the main feed channel bottom via an inclined flow guide, which deflect the approaching in the main feed channel pressure medium at least partially in the direction of the transverse and in particular at right angles to the longitudinal axis of the main feed channel oriented branch opening.
  • the branch region for the pilot control feed channel can be located directly in the main valve or in a valve housing of the main valve in a corresponding embodiment of the valve assembly. This is especially the case when the main valve is operated as a single valve.
  • the valve arrangement may be designed such that it has a connection body which acts as a support for the main valve and to which the main valve is detachably fastened or fastened.
  • the branch area may well be inside the main valve.
  • the pilot feed passage branches in the connector body from the main feed passage, and both feed passages suitably lead to a mounting surface of the connector body to which the main valve is mountable so as to communicate with both the main feed passage and the pilot feed passage.
  • the flow restriction wall is formed integrally with the channel wall delimiting the main feed channel. This allows a particularly simple production.
  • the main valve is expediently combined with at least one pilot valve to form a valve unit.
  • the pilot valve is expediently mounted detachably on the main valve. If the valve arrangement contains a connection body, the valve unit can be detachably mounted as a structural unit on the connection body or be.
  • FIGS. 7 to 11 corresponds to the structure of the main valve and pilot valve, not shown, that of the embodiment of FIGS. 1 to 6 .
  • Explanations referring to the main valve and pilot valve according to FIGS. 1 to 6 Accordingly, apply accordingly also for the embodiment of FIGS. 7 to 11 ,
  • valve units 3 each contain an example block-shaped or plate-shaped connector body 2 and a pilot-controlled valve unit 3.
  • the valve unit 3 is composed of a main valve 4 and attached to the main valve 4 pilot valve 5 together.
  • a modified construction, not shown, of the valve unit 3 has two pilot valves 5.
  • the union of the main valve 4 and the at least one pilot valve 5 to a valve unit 3 facilitates handling.
  • the at least one pilot valve 5 could also be formed and arranged separately from the main valve 4 (not shown).
  • the connecting body 2 forms a support for the valve unit 3. It has an assembly surface 6, which is designed to be equipped in a particularly releasable manner with the valve unit 3.
  • the valve assembly 1 contains no connector body 2.
  • the valve unit 3 is otherwise mounted at any location.
  • the design with connector body 2 has the advantage that a plurality of valve assemblies 1 can be very easily combined to form an assembly or valve batteries, in which the connector body 2 are in fluid communication with each other to allow a central supply and discharge of pressure medium.
  • the main valve 4 has a valve housing 8, in which a valve chamber 12 is formed, in which a main valve member 13 is received.
  • the main valve member 13 is in the valve chamber 12 under execution of a switching movement 14 in particular linearly movable. In this way, the main valve member 13 can be switched between a plurality of switching positions.
  • the main valve member 13 of the embodiment can take two switching positions. Shown is a first switching position, which represents a basic position assumed in the unactuated state in the embodiment and which is due to the fact that the main valve member 13 is constantly from a on the other hand, on the valve housing 8 supported return spring means 15 is acted upon.
  • the main valve member 13 can switch over that a motion coupled to him and preferably firmly connected to him drive surface 16 is acted upon by a fluidic pressure medium.
  • the drive surface 16 is expediently located on an end face of the main valve member 13.
  • the fluid loading of the drive surface 16 is controlled by the pilot valve 5.
  • the same has in the embodiment, the functionality of a 3/2-way valve and is able to connect by appropriate positioning of a pilot valve member 17 a pilot control working channel 18 selectively with a pilot feed 22 or a pilot discharge passage 23 fluidly.
  • the pilot working channel 18 extends between a pilot chamber 24 of the pilot valve 5 and a drive chamber 25 of the main valve 4, wherein the drive chamber 25 is limited, among other things of the drive surface 16 as a movable wall.
  • pilot control feed 22 through the pilot valve 5 is supplied with pressure medium, which will be referred to as a pilot control medium for better distinction below.
  • pilot valve member 17 assumes a closed position, which is normally in the unactuated state of the pilot valve 5, it separates the Vor Kunststoffspeisekanal 22 from the pilot chamber 24 by abutment against a valve seat 26 and connects the same simultaneously with the leading to the atmosphere Vor Kunststoff-Abzenkanal 23, so that through them a pressure relief of the drive chamber 25th is possible. Accordingly, the main valve member 13 assumes the already mentioned first switching position.
  • the electrically actuated and in particular designed as a solenoid valve pilot valve 5 is electrically activated.
  • an actuating voltage is applied to contact means 27 of the pilot valve 5.
  • the pilot valve member 17 moves to an open position in which it disconnects the pilot discharge passage 23 from the pilot chamber 24 and at the same time, due to its lifting from the valve seat 26, the pilot chamber 24 connected to the drive chamber 25 via the pilot working passage 18 connects to the pilot feed 22.
  • pilot medium can flow into the drive chamber 25 and build pressure therein which acts on the drive surface 16 and causes a switching force which is greater than the restoring force of the return spring means 15. As a result, the main valve member 13 shifts from the first switching position to the second switching position.
  • valve chamber 12 open at axially spaced locations, a plurality of fluid channels 28, which pass through the valve housing 8 of the main valve 4 and of which at least one of the connecting body 2 passes through in the case of existing connector body. It is therefore possible that at least one fluid channel 28 extends only in the valve housing 8 of the main valve 4 and that at least one fluid channel 28 has successive lengths, one of which is formed in the connection body 2 and the subsequent in the valve housing 8 of the main valve 4.
  • main feed channel 28a feed channel It is connected during operation of the valve assembly 1 to a pressure source P, which is in particular a compressed gas source and preferably a compressed air source.
  • the pressure source P supplies a fluid pressure medium under a certain working pressure and thus supplies the main valve 4.
  • At least one further fluid channel 28 acts as a working channel 28b. To him a consumer to be driven can be connected, for example, actuated by fluid force drive device.
  • Another fluid channel 28 represents a discharge channel 28c, which is connected during operation of the valve assembly 1 with a pressure sink.
  • the relief channel 28c is a venting channel connected to the atmosphere.
  • the main valve 4 can fulfill the functionality of a 3/2-way valve.
  • the main valve 4 has a higher functionality. It is designed here as a 5/2-way valve and has two further fluid channels 28, one of which forms another working channel 28 e and another another discharge channel 28 f.
  • valve assembly 1 To connect the main feed channel 28a to the pressure source P and to connect a respective working channel 28b, 28e with the consumer to be controlled, the valve assembly 1 is expediently equipped with connection units 32, on which away from the valve assembly 1 leading fluid lines 33, for example, compressed air hoses, under seal solvable connect.
  • connection units 32 On which away from the valve assembly 1 leading fluid lines 33, for example, compressed air hoses, under seal solvable connect.
  • the discharge channels 28c, 28f can also be provided with such connection units 32 if required. However, if, as in the embodiment, the pressure relief can take place directly to the atmosphere, it is more expedient to equip the discharge channels 28c, 28f only with mufflers 34.
  • the functionality of the main valve 4 is in the embodiment now that in the first switching position of the working channel 28b is connected to the main feed channel 28a and at the same time separated from the discharge channel 28c. In the second switching position of the working channel 28b communicates with the discharge channel 28c and is separated from the main feed channel 28a. On this functionality, the main valve 4 would be limited to a 3/2-way valve.
  • the two working channels 28b, 28e can be alternately acted upon or relieved of pressure by pressurized medium under the working pressure.
  • the two working channels 28b, 28e extend exclusively in the wall of the valve housing 8.
  • the main feed channel 28a in the exemplary embodiment consists of a longitudinal section designated as a valve channel 34, passing through the wall of the valve housing 8 and adjoining it Terminal body channel 35 designated and the terminal body 2 passing through the longitudinal section together.
  • the same also applies to the two relief channels 28c, 28f, in which the length extending in the valve housing 8 for better distinction with reference numeral 34a and extending in the connector body 2 longitudinal sections are designated by reference numeral 35a.
  • the length sections 35, 35a of the main feed channel 28a and the discharge channels 28c, 28f extending in the connection body 2 open at a distance from each other at the component surface 6.
  • main feed channel 28a as well as the other fluid channels 28 expediently runs in its entirety in the wall of the valve housing. 8
  • the main feed channel 28a extends between a channel inlet 37 and a channel outlet 38.
  • the channel inlet 37 is provided to be connected to the pressure source P, in particular by means of a connection unit 32 and a fluid line 33, the pressure medium to be controlled by the main valve 4 being connected to the pressure source Channel input 37 is fed into the main feed channel 28a.
  • the channel exit 38 of the main feed channel 28a opens into the valve chamber 12 in order to feed the pressure medium originating from the pressure source P into the valve chamber 12.
  • the pressure medium originating from the pressure source P flows from the channel inlet 37 in the direction of the channel outlet 38.
  • the main feed channel 28a has a downstream direction 42 directed towards the channel outlet 38 and an oppositely oriented upstream direction 43.
  • the pilot feed channel 22 is fed from the main feed channel 28a with the pressure medium to be supplied to the pilot valve 5 as a pilot control medium.
  • the pilot feed channel 22 branches off laterally from the main feed channel 28a in a branch region 44.
  • the pilot feed channel 22 has at its the pilot valve 5 and its pilot chamber 24 opposite end via a designated as branch port 45 channel opening, with which it opens laterally, ie at the main feed channel 28a defining peripheral channel wall 46, in the main feed channel 28a.
  • the branch opening 45 is aligned in particular at right angles to the channel longitudinal direction of the main feed channel 28a in the branch region 44.
  • a rectangular opening opening 47 of the branch opening 45 which is perpendicular to the opening cross section of the branch opening 45, extends expediently at right angles to the channel longitudinal axis 48 of the main feed channel 28a in the branch region 44.
  • the branch opening 45 is expediently located on one of the four mutually perpendicular wall sections of the channel wall 46, so that the opening cross-section Branch opening 45 preferably extends in a plane.
  • the branching region 44 in which the pilot feed channel 22 opens into the main feed channel 28a with its branch opening 45, lies upstream of the valve chamber 12. On its way from the channel inlet 37 to the channel outlet 38, the pressure medium consequently flows past the branch opening 45. A certain proportion of the pressure medium branches off into the pilot control feed channel 22 in order to flow as a pilot control medium to the pilot control valve 5.
  • the branch flow is illustrated by an arrow at 52 in the drawing.
  • flow stow wall 53 In the interior of the main feed channel 28a, located downstream of the branch opening 45 in the downstream direction 42, there is a flow obstacle designated flow stow wall 53, which prevents the pressure medium fed at the channel inlet 37 from flowing unaffected and at high speed past the branch opening 45.
  • the flow blocking wall 53 extends in the interior of the main feed channel 28a transversely to its channel longitudinal axis 48 and counteracts the pressure medium flowing in the downstream direction 42, a flow resistance. In this way, 45 usually occurring dynamic pressure fluctuations are selectively converted into a stable static pressure in the region of the branch opening. This has to
  • Consequence that the working pressure applied to the channel inlet 37 is derived unrestricted or with at least only a slight pressure drop as a pilot pressure for the pilot valve 5. In this way, high reliability for a reliable pilot function is given even at a low working pressure.
  • the problem of a pressure drop occurs in the branch region 52 when switching the main valve member 13.
  • a high flow rate is established in the main feed channel 28a, associated with a high flow rate also in the branch region 44.
  • the flow stagnation wall 43 at least partially traversing the main feed channel But now obstructs the fluid flow in the branch opening 45 immediately upstream region of the main feed channel 28a, so that the dynamic pressure component is reduced in favor of the static pressure component and the pilot medium remains at a pressure level sufficient to act by applying the drive surface 16 a fast and complete Switch over the main valve member 13 from the first switching position to the second switching position cause.
  • the flow stagnation wall 53 extends in both embodiments, starting from a portion of the channel wall 46 framing the branch opening 45 in the transverse direction of the main feed channel 28a into the main feed channel 28a.
  • the direction of the entry into the main feed channel 28a of the flow blocking wall 53 is referred to below as the longitudinal direction of the flow blocking wall 53, it extends in the same direction as the opening longitudinal axis 47th
  • the flow dam walls 53 of the two exemplary embodiments differ, above all, in their length in relation to the diameter of the main feed channel 28a. While the flow dam wall 53 in the embodiment of FIGS. 7 to 11 the main feed channel 28 a completely traverses, that extends between two facing and opposite portions of the channel wall 46, it traverses in the case of the embodiment of FIGS. 1 to 6 the main feed channel 28a only partially and protrudes, with a front facing away from the branch opening 45 front end surface 54, freely ending in the main feed channel 28a into it.
  • the branch opening 45 is framed by the flow blocking wall 53 along a part of its circumference.
  • the flow blocking wall 53 in particular does not have a straight cross-section transversely to its longitudinal extension, but at least in some areas has an arcuate section 55 with a curved cross-section, the concave side of which faces the upstream direction 43.
  • the flow blocking wall 53 therefore expediently has a groove-shaped structure, with the longitudinal groove opening facing the pressure medium flowing in from the channel inlet 37.
  • the Strömungsstauwand 53 may be formed arcuate in its entire cross section. This is exemplified in the embodiment of FIGS. 7 to 11 the case.
  • the flow dam wall 53 is formed there by the arc section 55, which is expediently circular arc-shaped.
  • the Strömungsstauwand 53 may also be profiled so that the arcuate portion 55 occupies only a portion of the cross-sectional profile.
  • wing section 56 connects wall section which extends transversely and in particular at right angles to the opening longitudinal axis 47 to the outside.
  • the axial length of the wing sections 56 is chosen in particular such that they are flush with the front end face 54 of the flow blocking wall 53, and therefore define the front end face 54 together with the end face of the arc section 55.
  • the wall section of the channel wall 46 on which the branch opening 45 is located and from which the flow blocking wall 43 extends into the main feed channel 28a is referred to below as the base wall section 46a.
  • the wall section of the main feed channel 28a opposite the base wall section 46a, transverse to the longitudinal direction of the main feed channel 28a, will hereinafter be referred to as the opposite wall section 46b.
  • the two wall sections of the main feed channel 28a extending between the base wall section 46a and the opposite wall section 46b along both sides of the flow blocking wall 43 will be referred to below as lateral wall sections 46c, 46d.
  • the flow restriction wall 43 extends in its longitudinal direction from the base wall portion 46a to the opposite wall portion 46b, uninterrupted.
  • the flow blocking wall 53 is fixed in particular to both of these wall sections 46a, 46b.
  • the fixation is in particular realized in that the flow dam wall 53 is in each case integrally connected to the channel wall 46 of the main feed channel 28a. If the body containing the main feed channel 28a-for example, the connection body 2 by way of example-consists of a plastic material, the flow blocking wall 53 can be formed directly at low cost during its injection molding production.
  • FIGS. 1 to 6 ends the Strömungsstauwand 53 at a distance in front of the opposite wall portion 46b. Thus, there is a gap between the opposite wall section 46b and the front end face 54 of the flow blocking wall 53 facing this wall section 46b.
  • main flow passage 28a only partially traversing Strömungsstauwand 53 is that it is preferably integrally attached to the channel wall 46 so that it protrudes quasi only in the manner of a wall projection in the main feed channel 28a.
  • the flow blocking wall 53 it is advantageous to arrange the flow blocking wall 53 so that it extends at least substantially diametrically in the main feed channel 28a. In the embodiment of FIGS. 7 to 11 the main feed channel 28a is penetrated diametrically by the flow blocking wall 53.
  • the aim should be to minimize the impact on the flow medium provided by the main feed channel 28a for the pressure medium as little as possible.
  • the free flow into the main feed channel 28a projecting flow blocking wall 53 has the advantage that between its front end surface 54 and the opposite wall portion 46b, a relatively large cross section for the valve chamber 12 to flow Print medium can be provided.
  • the axial length of the flow blocking wall 53 may be relatively short, so that it extends in particular to at most the channel center of the main feed channel 28a.
  • the flow stow wall 53 expediently ends with its front end face 54 even before reaching the channel longitudinal axis 48 in the branch region 44.
  • the flow stagnation wall 53 In order to achieve an optimal accumulation effect for the incoming pressure medium despite a relatively short flow stagnation wall 53, it is expedient to design the flow stagnation wall 53 such that it occupies or fills the cross section of the main feed channel 28a over its entire length measured in the axial direction of the opening longitudinal axis 47 , The pressure medium flowing in from the channel inlet 37 is thus prevented from flowing laterally past the flow blocking wall 53.
  • the wing sections 56 extend laterally as far as the channel wall 46.
  • the two wing sections 56 extend in each case to the adjacent lateral wall section 46c, 46d with which they are expediently connected in one piece.
  • a passage opening 57 is located only on one of the two longitudinal sides of the flow blocking wall 53.
  • the branch opening 45 does not open diametrically but eccentrically laterally into the main feed channel 28a, for example in the immediate vicinity one of the lateral wall portions 46c or 46d.
  • the flow blocking wall 53 can be provided with a relatively small width transversely to its longitudinal axis, with the result that a relatively wide passage opening 57 for the pressure medium can be provided on the other longitudinal side.
  • the flow stagnation wall 53 preferably has, at its lower side oriented in the flow direction 43, at least one flow guide surface 58 which at least partially imposes a change in direction, in particular in the direction of the branch opening 45, to the pressure medium flowing in the downstream direction 42.
  • FIGS. 1 to 6 The embodiment of FIGS. 1 to 6 is equipped with two such flow guide 58. One of each is located at the bottom of each wing section 56 FIG. 4 It can be seen that these flow guide surfaces 58 are inclined relative to the opening longitudinal axis 47.
  • the flow guide surfaces 58 may in particular run obliquely starting from the free, front end face 54, that they extend in the direction of the branch opening 45 and at the same time, superimposed, in the current direction 42.
  • the flow guide surface 58 may be a flat surface or a curved surface.
  • Each flow guide 58 can also, as in particular in FIG. 5 is apparent and in FIG. 10 is indicated by dash-dotted lines as an optional variant, have such a skew, that they - viewed in cross-section perpendicular to the opening longitudinal axis 47 - with respect to the channel longitudinal axis 48 is inclined.
  • the oblique position is chosen in particular such that the flow guide surface 58 extends obliquely inwards in the direction of the center of the main feed channel 28a and at the same time in the current direction 42.
  • the selected geometry of the Strömungsstauwand 53 ensures that almost the full height of the working pressure is available as a pilot pressure for the actuation of the main valve member 13, even if during a switching operation of the main valve member 13 in the branch region 44 high flow velocities occur.
  • a very cost-effective measure can be ensured in this way a high reliability for the main valve 4 and the entire valve unit 3.
  • the branch portion 44 as in the embodiments, is formed in a separate connector body 2 supporting the main valve 4, the flow dam wall 53 is thus realized in the connector body 2 is also such main valves 4 benefit from the improved reliability, which have no measures for the internal tap of the pilot medium. It should be noted, however, that the inventive measures readily in a valve housing 8 of the main valve member 13 extending main feed channel 28a or longitudinal section of the main feed channel 28a can be realized when the branch region 44 is located in this valve housing 8.
  • the main feed channel 28a can have a plurality of branch regions 44 which are spaced apart in their longitudinal direction, at each of which a pilot feed channel 22 opens and which are each assigned via one of the branch apertures 45 located there Flow dam wall 53 have.
  • each branch opening 45 can then be assigned its own flow dam wall 53, as is the possibility of assigning one and the same flow dam wall 53 to a plurality of branch openings 45.
  • a branch opening 45 may be provided not only on the base wall portion 46a but also on the opposite wall portion 46b, particularly such that the branch openings 45 are opposite to the longitudinal direction of the main feed channel 28a.
  • the main feed channel 28a then passes completely through flow stowage wall 53 in the downstream direction 42.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
  • Valve Housings (AREA)
  • Multiple-Way Valves (AREA)

Claims (15)

  1. Ensemble de vannes, comportant au moins une vanne principale (4) et au moins une vanne pilote (5) associée à la vanne principale (4) et pouvant être actionnée électriquement, sachant que la vanne principale (4) présente au moins un élément de vanne principale (13) disposé dans une chambre de vanne (12) et pouvant être commuté entre diverses positions de commutation par l'action exercée par un fluide commandée du côté de la vanne pilote (5), sachant qu'un canal d'alimentation principal (28a) de l'ensemble de vannes (1) servant à alimenter un fluide sous pression pouvant être commandé par l'élément de vanne principale (13) débouche dans la chambre de vanne (12) et sachant qu'au moins un canal d'alimentation pilote (22) doté d'un orifice de branchement (45), lequel canal mène vers la vanne pilote (5) au moins au nombre d'une et alimente cette dernière en un fluide sous pression utilisé pour soumettre de manière commandée à l'action du fluide l'élément de vanne principale (13), dévie latéralement du canal d'alimentation principal (28a) dans une zone de branchement (44) se trouvant en amont de la chambre de vanne (12), caractérisé en ce qu'est disposée dans la zone de branchement (44) une paroi de retenue d'écoulement (53) pour le fluide sous pression injecté dans le canal d'alimentation principal (28a), laquelle paroi de retenue d'écoulement traverse au moins partiellement le canal d'alimentation principal (28a) et ce faisant est située à côté de l'orifice de branchement (45) du canal d'alimentation pilote (22) au moins au nombre d'un sur le côté situé en aval du canal d'alimentation principal (28a).
  2. Ensemble de vannes selon la revendication 1, caractérisé en ce que la paroi de retenue d'écoulement (53) encadre l'orifice de branchement (45) le long d'une partie de sa périphérie.
  3. Ensemble de vannes selon la revendication 2, caractérisé en ce que la paroi de retenue d'écoulement (53) présente au moins par endroits une section transversale en forme d'arc.
  4. Ensemble de vannes selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la paroi de retenue d'écoulement (53) traverse complètement de part en part le canal d'alimentation principal (28a) en laissant libre au moins un orifice de passage (57) autorisant le passage du fluide sous pression, sachant que ledit ensemble de vannes est fixé de manière appropriée au niveau de sections de paroi (46a, 46b) se faisant face de la paroi de canal (46) du canal d'alimentation principal (28a), en particulier d'un seul tenant.
  5. Ensemble de vannes selon la revendication 4, caractérisé en ce que la paroi de retenue d'écoulement (53) traverse diamétralement le canal d'alimentation principal (28a).
  6. Ensemble de vannes selon la revendication 4 ou 5, caractérisé en ce qu'un orifice de passage (57) pour le fluide sous pression à acheminer à la chambre de vanne (12) est prévu latéralement, en particulier de part et d'autre, entre la paroi de retenue d'écoulement (53) et la paroi de canal (46) du canal d'alimentation principal (28a).
  7. Ensemble de vannes selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la paroi de retenue d'écoulement (53) ne traverse que partiellement le canal d'alimentation principal (28a) et fait saillie dans le canal d'alimentation principal (28a) avec une extrémité libre.
  8. Ensemble de vannes selon la revendication 7, caractérisé en ce que la paroi de retenue d'écoulement (53) s'étend à l'intérieur du canal d'alimentation principal (28a) de manière transversale par rapport à la direction longitudinale du canal d'alimentation principal (28a) en partant d'une section de la paroi de canal (46) du canal d'alimentation principal (28a), encadrant l'orifice de branchement (45).
  9. Ensemble de vannes selon la revendication 7 ou 8, caractérisé en ce que la paroi de retenue d'écoulement (53) fait saillie dans le canal d'alimentation principal (28a) dans une direction longitudinale en partant de la zone de bord de l'orifice de branchement (45), sachant que ledit ensemble de vannes occupe la section transversale du canal d'alimentation principal (28a) de manière appropriée sur toute sa longueur.
  10. Ensemble de vannes selon l'une quelconque des revendications précédentes 1 à 9, caractérisé en ce que la paroi de retenue d'écoulement (53) présente au niveau de son côté inférieur orienté dans la direction en amont (43) du canal d'alimentation principal (28a), au moins une surface de guidage d'écoulement (58), laquelle s'étend de manière appropriée, de manière inclinée par rapport à la direction longitudinale du canal d'alimentation principal, sachant qu'est présente en particulier une inclinaison par rapport à un axe longitudinal de l'orifice (47) perpendiculaire à la section transversale de l'orifice de l'orifice de branchement (45).
  11. Ensemble de vannes selon l'une quelconque des revendications 1 à 10, caractérisé en ce que la paroi de retenue d'écoulement (53) présente au niveau de son côté inférieur orienté dans la direction en amont (43) du canal d'alimentation principal (28a), au moins une surface de guidage d'écoulement (58), qui en partant d'une surface frontale (54) de la paroi de retenue d'écoulement (53) libre et opposée à l'orifice de branchement (45) présente une inclinaison telle qu'elle s'étend en direction de l'orifice de branchement (45) ainsi que dans la direction en aval (42) du canal d'alimentation principal (28a).
  12. Ensemble de vannes selon l'une quelconque des revendications 1 à 11, caractérisé en ce que la paroi de retenue d'écoulement (53) dispose d'une section de paroi (55) centrale en forme d'arc et de deux sections de paroi (56) se raccordant respectivement à un côté longitudinal à côté de ladite section de paroi (55) en forme d'arc, faisant saillie à la manière d'ailettes, sachant que les sections de paroi (56) de type ailette disposent de manière appropriée au niveau de leur côté orienté dans la direction en amont (43) du canal d'alimentation principal (28a) de respectivement une surface de guidage d'écoulement (58) inclinée.
  13. Ensemble de vannes selon l'une quelconque des revendications 1 à 12, caractérisé en ce que ledit ensemble de vannes dispose d'un corps de raccordement (2), au niveau duquel la vanne principale (4) est fixée ou peut être fixée de manière amovible, sachant que le canal d'alimentation principal (28a) s'étend en partie dans le corps de raccordement (2) et en partie dans un boîtier de vanne (8) contenant la chambre de vanne (12) et sachant que la zone de branchement (44) pour le canal d'alimentation pilote (22) est disposée de manière appropriée dans la section longitudinale du canal d'alimentation principal (28a), s'étendant dans le corps de raccordement (2).
  14. Ensemble de vannes selon l'une quelconque des revendications 1 à 13, caractérisé en ce que la paroi de retenue d'écoulement (53) est réalisée d'un seul tenant avec la paroi de canal (46) délimitant le canal d'alimentation principal (28a).
  15. Ensemble de vannes selon l'une quelconque des revendications 1 à 14, caractérisé en ce que la vanne principale (4) et la vanne pilote (5) au moins au nombre d'une sont regroupées pour former une unité de vanne (3), sachant que la zone de branchement (44) se trouve à l'intérieur de la vanne principale (4) ou dans un corps de raccordement (2) appartenant à l'ensemble de vannes (1), au niveau duquel est fixée ou peut être fixée de manière amovible l'unité de vanne (3).
EP10015192A 2010-12-01 2010-12-01 Agencement de vannes Active EP2461045B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES10015192T ES2403078T3 (es) 2010-12-01 2010-12-01 Disposición de válvulas
EP10015192A EP2461045B1 (fr) 2010-12-01 2010-12-01 Agencement de vannes
CN201110392664.3A CN102486186B (zh) 2010-12-01 2011-12-01 阀装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10015192A EP2461045B1 (fr) 2010-12-01 2010-12-01 Agencement de vannes

Publications (2)

Publication Number Publication Date
EP2461045A1 EP2461045A1 (fr) 2012-06-06
EP2461045B1 true EP2461045B1 (fr) 2013-03-27

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Application Number Title Priority Date Filing Date
EP10015192A Active EP2461045B1 (fr) 2010-12-01 2010-12-01 Agencement de vannes

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Country Link
EP (1) EP2461045B1 (fr)
CN (1) CN102486186B (fr)
ES (1) ES2403078T3 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU603907B2 (en) * 1987-06-30 1990-11-29 Hitachi Construction Machinery Co. Ltd. Hydraulic drive system
JPH0627901Y2 (ja) * 1987-07-03 1994-07-27 黒田精工株式会社 電磁弁装置
DE4004834C2 (de) 1990-02-16 1996-06-13 Festo Kg Ventilbaugruppe
US5320497A (en) * 1991-06-26 1994-06-14 Smc Kabushiki Kaisha Vacuum feeding apparatus
CN1026256C (zh) * 1991-07-02 1994-10-19 浙江瑞安永久机电研究所 隔离自控阀
DE10112496B4 (de) * 2001-03-15 2004-09-30 Dbt Gmbh Ventilblock für elektrohydraulische Steuereinrichtung und Mehrwegventile hierfür

Also Published As

Publication number Publication date
EP2461045A1 (fr) 2012-06-06
CN102486186B (zh) 2016-05-04
CN102486186A (zh) 2012-06-06
ES2403078T3 (es) 2013-05-14

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