WO2022106009A1 - Électrovanne - Google Patents

Électrovanne Download PDF

Info

Publication number
WO2022106009A1
WO2022106009A1 PCT/EP2020/082738 EP2020082738W WO2022106009A1 WO 2022106009 A1 WO2022106009 A1 WO 2022106009A1 EP 2020082738 W EP2020082738 W EP 2020082738W WO 2022106009 A1 WO2022106009 A1 WO 2022106009A1
Authority
WO
WIPO (PCT)
Prior art keywords
control body
flow
valve seat
motor vehicle
vehicle according
Prior art date
Application number
PCT/EP2020/082738
Other languages
German (de)
English (en)
Inventor
Besart Sadiku
Original Assignee
Pierburg Gmbh
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 Pierburg Gmbh filed Critical Pierburg Gmbh
Priority to PCT/EP2020/082738 priority Critical patent/WO2022106009A1/fr
Publication of WO2022106009A1 publication Critical patent/WO2022106009A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/44—Details of seats or valve members of double-seat valves
    • F16K1/443—Details of seats or valve members of double-seat valves the seats being in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves

Definitions

  • the invention relates to an electromagnetic valve for a motor vehicle with a housing having an axial inlet and a radial outlet, a first valve seat between the inlet and the outlet, which is formed on the housing, and a control body which is connected to a first by means of an electromagnetic actuator Bearing surface on the first valve seat can be deducted and lifted from the first valve seat.
  • valves to be actuated electromagnetically are used in motor vehicles, for example as diverter valves, coolant switching valves, oil valves or exhaust gas valves.
  • coolant valve When used as a coolant valve, it must sometimes be possible to release very large volume flows in order to be able to ensure an adequate supply of coolant to the drive motor.
  • large flow cross sections have to be made available, but this means that the dynamic pressure that occurs acts on a large area on the control body, which leads to significantly increased closing and holding forces that are necessary. These forces can only be applied using very large and cost-intensive electromagnets or reduced using pressure force-compensated valves.
  • Such a pressure-force-balanced valve is described, for example, in DE 10 2015 101 477 A1.
  • This valve has an electromagnetic actuator with a core, an armature, a coil and return elements for closing the magnetic circuit.
  • the core has a through opening through which a valve rod protrudes from an axially movable armature to a control body which is arranged on the opposite side of the core to the armature and having a Valve seat interacts.
  • the coil When the coil is energized, the armature is pulled towards the core and the control body is thus pressed onto the valve seat. If the current flow is terminated, a compression spring pushes the armature away from the core so that the control body is lifted off the valve seat.
  • this valve has a through hole in the control body, via which the inlet of the valve is constantly connected to the side of the movement unit, consisting of the armature and the control body, that faces away from the inlet, whereby this movement unit is force-balanced.
  • this can only be achieved if the back of the control body is reliably sealed off from the outlet and if the pressure in the valve is equalized sufficiently quickly.
  • both lead to increasing costs in the manufacture and assembly of the valve or limit its durability, especially when used in the coolant sector, since the contamination that occurs can lead to the valves becoming stiff and the seals wearing, which can only be achieved by using correspondingly high-quality valves materials used can be avoided.
  • the task is therefore to create a robust and cost-effective electromagnetic valve with the smallest possible electromagnet, the functionality of which is given even when contamination occurs, so that the mobility of the control body is reliably maintained and both reliable permanent sealing and the release of large flow cross-sections are made possible becomes.
  • the electromagnetic valve according to the invention has a housing on which an axial inlet and a radial outlet are formed. In this case, under radial and axial, only one inflow direction in the area of the flow cross section to be regulated is to be considered, i.e. upstream and downstream of the to understand the body of rules.
  • a first valve seat is formed on the housing between the inlet and the outlet and radially surrounds a flow cross section.
  • the electromagnetic valve has a control body, which can be placed on the first valve seat and lifted off the first valve seat by means of an electromagnetic actuator with a first bearing surface by the control body being coupled in motion to an armature of the electromagnet.
  • the control body changes its position relative to the valve seat depending on the energization of the electromagnet, in which case the armature is displaced in the direction of a core when energized.
  • the counter-movement takes place due to a spring force, which acts at least indirectly on the control body or the electromagnet.
  • a flow-around body is fastened axially between the axially movable control body and the inlet, on which a second valve seat is formed, against which the control body can be moved with a second bearing surface.
  • the flow-around body reduces the dynamic pressure from the inlet acting on the control body, since there is no direct vertical flow onto the control body, since it is arranged in the flow shadow of the flow-around body.
  • the flow-around body has a flow-guiding function that minimizes the pressure drop that occurs during the deflection.
  • control body has an annular projection which extends axially in the direction of the first valve seat and which forms the first bearing surface, so that the control body surrounds the body in the closed state surrounds radially. Accordingly, a large flow body can be realized, which shields large cross sections of the control body.
  • the flow-around body can also be arranged axially offset relative to the first valve seat, as a result of which large cross-sections can also be realized with gradual deflection at the same time.
  • the first valve seat is advantageously at least axially deformable. A very good seal is achieved in this way.
  • the axial distance between the second valve seat and the second contact surface of the control body should preferably be slightly larger than the distance between the first valve seat and the first contact surface of the control body, because then the control body can also firstly with its first contact surface against the first valve seat can be moved and the second valve seat can also be closed by a further movement with elastic deformation of the first valve seat. In this case, it is possible to manufacture and assemble with significantly wider tolerances, which saves costs.
  • the second valve seat is arranged in the radially outer region of the flow body, since in this case the area on which the differential pressure between the inlet and the outlet acts when the electromagnetic valve is closed is minimized.
  • the second bearing surface is preferably formed by an elastic sealing ring, so that leakages through the second valve seat are also avoided, since a high degree of tightness is achieved by the possible deformation.
  • a particularly simple assembly results when the control body has a radial groove in which the elastic sealing ring is arranged. In this way, the sealing ring can simply be inserted into the groove during assembly. It would also be conceivable to design the control body in two parts and to clamp the sealing ring between the two parts.
  • the control body can be manufactured either separately or in one piece with the valve stem on which the armature acts.
  • At least one passage opening is preferably formed in the control body, which is arranged radially inside the contact surface of the control body that corresponds to the second valve seat and via which the two axial sides of the control body are connected to one another. This passage opening ensures that when the second valve seat closes, no counterforce is generated by an enclosed volume to be compressed between the flow body and the control body, which could lead to a pumping effect when controlling an incompressible medium.
  • a compression spring is clamped between the flow body and the control body, by means of which the counteracting force to the electromagnetic force is realized. Clamping in this position rather than inside the electromagnet eases assembly and reduces the number or complexity of parts used.
  • a recess is formed on the side of the flow body opposite the inlet, in which the compression spring is accommodated.
  • the flow-around body is preferably attached to the housing via webs, between which flow cross-sections are formed, via which the inlet can be connected to the outlet. These webs can be made thin so that large flow cross sections can be realized.
  • an axial projection surface of the inflow surface of the flow-around body pointing towards the inlet has essentially the same cross-section as an inlet channel immediately upstream of the flow-through body, since in this embodiment the entire control body is shielded from a direct axial flow from the inlet connection and is therefore also shielded the dynamic pressure acting on it is minimized, which leads to reduced closing forces.
  • the housing preferably has an inlet connector which is formed in one piece with the flow-around body. This reduces the assembly costs, since the flow-around body is automatically assembled when the inlet connector is connected. Furthermore, the relative position of these components to one another is defined, which avoids misalignments occurring during assembly. In particular, it can be ensured in this way that the two valve seats are formed in parallel planes, as a result of which a tight seal is made possible.
  • the axially deformable first valve seat is formed by an elastic seal, which is arranged between the inlet connector and a flow housing part of the housing. This ensures a particularly simple assembly of the valve seat and the inlet connector.
  • the electromagnetic valve according to the invention is correspondingly inexpensive to produce, since the tolerances to be used can be selected to be relatively large, the number of components is low in complexity, the assembly work is reduced and a small actuator can be used, since the movement unit, consisting of armature and Control body, forces acting is significantly reduced compared to known, non-force-balanced valves. Furthermore, large flow cross sections can be realized with small flow resistances.
  • the figure shows a side view of a solenoid valve according to the invention in a sectional representation.
  • the electromagnetic valve consists of an electromagnetic actuator 10, which consists of a coil 12, which can be supplied with electricity via a plug 14, and which is wound on a coil carrier 16 and a fixed core 18 and an axially movable armature 20, which both made of ferromagnetic material.
  • the electromagnetic circuit is closed by a yoke 22 radially surrounding the coil 12 and two return elements 24 at the axial ends of the coil 12 .
  • the actuator 10 has an outer actuator housing 26 made of plastic.
  • a pot-shaped sliding sleeve 28 is arranged inside the coil carrier 16, in which the armature 20 is guided axially and which prevents the medium to be controlled from penetrating into the coil by the sliding sleeve 28 having a closed bottom 30 on one side against which the armature 20 rests in one of its end positions, and the outer surface 32 of which extends through the entire electromagnet and, on the side opposite the base 30, rests radially on the inside against a sealing ring 34, which rests radially on the outside against the actuator housing 26 with which it is injection-molded.
  • a valve rod 36 abuts axially against the armature 20 and protrudes through a through hole 38 in the core 18 and at the end opposite to the armature 20 a control body 42 is formed.
  • An axially extending annular projection 46 is formed on the control body 42, the axial end of which serves as a bearing surface 48 with which the control body 42 can be placed on a first valve seat 50 which is arranged on a housing 52 of the electromagnetic valve.
  • This housing 52 consists of the actuator housing 26, a flow housing part 54, which is attached to the actuator housing 26 and has a radial outlet 56, and an inlet connector 57, which has an axial inlet 58 and in which an inlet channel 59 is formed.
  • an elastic seal 60 which forms the first axially deformable valve seat 50 on which the first bearing surface 48 of the control body 42 rests in the closed state, this inlet connection 57 is pushed against and into the flow housing part 54 and fastened there.
  • a flow body 62 is formed integrally with the inlet connection piece 57 and is fastened to the downstream region of the inlet connection piece 57 by means of three webs 64, the webs 64 extending obliquely inwards from the region lying radially inwards in relation to the first valve seat 50, in the direction of the actuator 10. so that the annular projection 46 can still be placed unhindered on the valve seat 50, the control body 42 surrounding the flow-around body 62 radially in this state.
  • the flow-around body 62 has an inflow surface 66 facing the inlet 58 which is rotationally symmetrical, with the center point of the inflow surface 66 protruding furthest into the inlet channel 59 and the inflow surface 66 further extending with a component that increases in the radial direction.
  • the radial expansion of the Flow-around body 62 which is arranged axially between control body 42 and inlet 58, or in other words a projection area of flow-around body 62 in an axial view, corresponds approximately to the cross section of inlet channel 59, so that control body 42 is shielded from the flowing medium when the solenoid valve is open .
  • the flow is gradually deflected from its purely axial flow direction along the inflow surface 66 in the radial direction and can flow through the spaces between the webs 64, which form flow cross sections 68, to the outlet 56 when the solenoid valve is open.
  • This shielding significantly reduces the force of the electromagnet required for closing, since the dynamic pressure acting perpendicularly on the control body 42 is reduced by the intermediate flow body 62 and a direct flow of the control body 42 is largely prevented.
  • an elastic sealing ring 70 is clamped in an inner radial groove 44 of the control body 42, which serves as a second contact surface 72 when the electromagnetic valve is completely closed and rests on a second valve seat 74, which is located on a is arranged on the side of the flow-around body 62 facing away from the inlet 58 in the radially outer region of the flow-through body 62 .
  • the effective area is reduced the closer the second bearing surface 72 is arranged radially to the first bearing surface 48 .
  • the second Bearing surface 72 on the control body 42 is formed a through-opening 75 through which the medium present in the intermediate space can flow out of this space.
  • a compression spring 76 is also centrally clamped in the space axially between the flow-around body 62 and the control body 42 Armature 20 is loaded, so that when the coil 12 is not energized by the compression spring 76, the control body 42 and the armature 20 are displaced into the open position, in which the bearing surfaces 48, 72 are lifted off the valve seats 50, 74.
  • the coil 12 is energized so that the armature 20 is pulled towards the core 18 against the force of the compression spring 76 and the valve rod 36 is moved with the control body 42 to the first valve seat 50 until the control body 42 with its first bearing surface 48 rests on the first valve seat 50. Due to the axial deformability of the seal 60 or the first valve seat 50, the control body 42 can be moved slightly further with the armature 20 until the second bearing surface 72 also rests on the second valve seat 74.
  • the distance between the first valve seat 50 and the first contact surface 48 is selected to be slightly smaller than between the second valve seat 74 and the second contact surface 72, which means that large tolerances can be used for manufacture and assembly and yet a tight contact on both Valve seats 50, 74 can be realized.
  • the illustrated electromagnetic valve according to the invention can be manufactured and assembled accordingly inexpensive and has a low power consumption and a small size, since the actuator due to the reduced required actuating and holding forces with a small
  • the compression spring can also be placed between the armature and the core, or the valve can be constructed as a normally closed valve.
  • the flow body can be fixed as a separate component in the housing or the control body can be made in one piece or attached to the valve rod. Also the existing ones
  • Housing divisions can be changed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

On connaît des électrovannes pour des véhicules à moteur qui ont : un boîtier (52), qui a une entrée axiale (58) et une sortie radiale (56) ; un premier siège de soupape (50) entre l'entrée (58) et la sortie (56) qui est formé sur le boîtier (52) ; et un corps de commande (42), dont une première surface de contact (48) peut être positionnée sur le premier siège de soupape (50) et soulevée du premier siège de soupape (50) au moyen d'un actionneur électromagnétique (10). Afin que seules des forces d'actionnement et de retenue mineures soient nécessaires, même dans le cas d'une soupape n'ayant pas fait l'objet d'un équilibrage de forces, selon l'invention, il existe, entre le corps de commande (42) et l'entrée (58), un corps (62) autour duquel un écoulement peut se produire et sur lequel un second siège de soupape (74) est formé, contre lequel une seconde surface de contact (72) du corps de commande (42) peut être déplacée.
PCT/EP2020/082738 2020-11-19 2020-11-19 Électrovanne WO2022106009A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/082738 WO2022106009A1 (fr) 2020-11-19 2020-11-19 Électrovanne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/082738 WO2022106009A1 (fr) 2020-11-19 2020-11-19 Électrovanne

Publications (1)

Publication Number Publication Date
WO2022106009A1 true WO2022106009A1 (fr) 2022-05-27

Family

ID=73497786

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/082738 WO2022106009A1 (fr) 2020-11-19 2020-11-19 Électrovanne

Country Status (1)

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WO (1) WO2022106009A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015101477A1 (de) 2015-02-02 2016-08-04 Pierburg Gmbh Elektromagnetventil für den Kfz-Bereich
DE102018127810A1 (de) * 2018-11-07 2020-05-07 Pierburg Gmbh Axial durchströmbares Fluidventil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015101477A1 (de) 2015-02-02 2016-08-04 Pierburg Gmbh Elektromagnetventil für den Kfz-Bereich
DE102018127810A1 (de) * 2018-11-07 2020-05-07 Pierburg Gmbh Axial durchströmbares Fluidventil

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