KR20100018555A - Solenoid valve - Google Patents

Abstract

The invention relates to a solenoid valve having a magnet assembly and a valve cartridge (5) comprising a valve insert (22), a locking element (7) movably guided within the valve insert (22), and a valve body (10), wherein a main valve is disposed between a fluid inlet (27) and a fluid outlet (26), which has a main sealing element (7.1) connected to the locking element (7) and a main valve seat (12) disposed in the valve body (10), wherein a magnetic force generated by the magnet assembly moves the locking element (7) in the direction of the valve body (10), whereby the main sealing element (7.1) dips into the main valve seat (12) in a sealing manner, and wherein a check valve (25) is disposed in a bypass to the main valve (10) concentric to the main valve axis (1.1), said check valve having a sealing element (11) and a valve seat. According to the invention the valve body (10) is configured as a sleeve in which the sealing element (11) of the check valve (25) is guided in an axially movable manner, wherein the main valve seat (12) having a throughput opening is disposed on a bonnet-shaped end of the valve body sleeve (10), and wherein the sealing element (11) of the check valve interacts in a sealing manner with the valve seat, which is formed by an edge (20) of the valve body sleeve (10) that is open at this end.

Description

Magnetic valve {SOLENOID VALVE}

The present invention relates to a magnetic valve according to the preamble of the independent claim 1.

A conventional magnetic valve, in particular a magnetic valve for a hydraulic system, for example used in an anti-lock brake system (ABS), an anti-slip adjustment system (ASR-System) or an electronic stability program system (ESP-System) is shown in FIG. As shown in FIG. 1, a conventional magnetic valve 1 embodied as, for example, a regulating valve that is opened without a current supply, includes a magnetic subassembly 2 that generates magnetic flux, and a valve cartridge 5 ′, The magnetic subassembly comprises a housing outer wall (2.1), a winding carrier (2.2), a coil winding (2.3) and a cover disc (2.4), wherein the valve cartridge is encapsulated by a capsule (5.1), a sealing weld (4). A valve insert 22 connected with the armature, an armature 6 with a first closing member 7 'embodied as a tappet and a return spring 18. The magnetic subassembly 2 is a magnetic force that moves the longitudinally moving armature 6 with the first closure member 7 'implemented as a tappet against the valve insert 22 against the force of the return spring 8. Create The coil winding 2.3, which is wound on the winding carrier 2.2, forms an electrical coil which is controllable via the electrical connections 2.5. The valve insert 22 guides the magnetic flux introduced from the magnetic subassembly 2 through the cover disc 2.4 in the axial direction through the air gap 3 in the direction of the armature 6. By the current supply to the coil windings 2.3 via the electrical connections 2.5 and the magnetic flux generated thereby, the armature 6 is moved against the valve insert 22 against the force of the return spring 8.

In addition, the valve insert 22 houses a so-called valve body 10 'having a main valve seat 12' and a first closing member 7 'embodied as a tappet into the main valve seat is embodied as a sealing hemisphere. The magnetic valve 1 is sealed because it is inserted in a sealing manner by the main sealing member 7.1 '. For caulking the caulking region 18. 1 of the fluid block 18, a caulking flange 9 is integrally formed in the valve insert 22. As shown in Fig. 1, the conventional magnetic valve 1 includes an eccentrically arranged check valve 30, which functions as a directional flow control. The check valve 30 of the conventional magnetic valve 1 is an important part and includes a maximum of the movable sealing member 32, the sealing seat 34 disposed in the check valve seat carrier 31, and the movable sealing member 32. In order to define the stroke, it comprises a stroke defining portion or contact portion formed here with the planar filter 33. The check valve 30 lying eccentric with respect to the valve center axis 1.1 generally has the form of a ball-hollow cone. That is, the sealing member 32 is embodied as a ball and the sealing seat 34 disposed in the check valve seat carrier 31 has a hollow cone shape. The check valve seat carrier 31 of the hollow cone 34, embodied as a plastic insert, adds a seal to the valve body 10 ′ and a planar seal and ring filter 35 to the valve body 10 ′. It is used for the reception of the filter 33.

In addition, European patent publication EP 1 101 678 A1 describes a magnetic valve with a check valve. The magnetic valve described includes a main valve disposed between the fluid inlet and the fluid outlet, and a check valve disposed concentrically with respect to the main valve axis in the bypass to the main valve, the main valve comprising a main sealing member and A main valve seat disposed within the valve body, the check valve comprising a sealing member and a valve seat. The valve seat is disposed in a valve component member embodied as a plastic insert, in which a sealing member is received in a cylindrical recess. The valve component is used for sealing in the valve body and for receiving ring-shaped filters and flat filters in addition to sealing to the surrounding fluid system.

In contrast, the magnetic valve according to the invention with the features of the independent claim 1 has the advantage that the valve body is embodied as a sleeve and the sealing member of the check valve is guided axially in the sleeve. The through opening of the main valve seat is arranged at the hooded end of the valve body sleeve, the sealing member of the check valve acts in sealing operation with the valve seat, and the valve seat is formed with an edge of the valve body sleeve with the end open. .

By the use of the inner bore of the valve body and the movable guide of the sealing member in the valve body, the axial dimension of the valve cartridge or the magnetic valve can be preferably reduced, and the valve body further functions as a check valve with the movable sealing member. . By using the protruding valve body as a sealing counterpart of the sealing member, the sealing function of the check valve hardly depends on other part- or assembly tolerances, and the manufacturing cost is preferably reduced by the reduction of mutual matching- and accuracy requirements, and the check The robustness of the valve function is increased.

In addition, by the implementation of the magnetic valve according to the invention, the symmetry of the valve cartridge is improved, whereby advantages are obtained in assembly and post-treatment. As the check valve function is fully integrated into the valve cartridge, the manufacturing- or assembly process can be simplified compared to a structure in which the check valve function only needs to be combined with the surrounding fluid block. The central arrangement of the check valve function also simplifies the magnetic valve and also reduces the radial dimension, whereby advantages are obtained when the assembly and the surrounding fluid block are under load due to the reduced effective pressure surfaces. The peripheral valve component, which also closes the magnetic valve in the lower region, is much simpler since the peripheral valve component preferably comprises only a non-moving sealing position and implements two filter functions. As a result, an advantage is obtained in the robustness, and thus the quality improvement or the cost reduction is possible in the manufacture of the magnetic valve according to the present invention.

The valve body sleeve and the sealing member can be embodied, for example, as a metal component, thereby improving the wear resistance to the elastomeric sealing component over its lifetime. In addition, the hysteresis generally seen in embodiments with elastomeric sealing components is reduced by the metal sealing components.

Measures and improvements embodied in the dependent claims enable the desired improvement of the magnetic valve set forth in the independent claim 1.

Particularly preferably, the sealing area of the sealing member is embodied as a cone or ball and the edge of the valve body sleeve is embodied as a round edge or hollow cone or hollow ball. By sealing of the sealing area embodied as a cone on the edge of the valve body sleeve embodied as a rounded edge, the sealing can be improved compared to a pure axially sealed check valve structure when the differential pressure is small. If more desirable in certain applications, alternative forms of sealing area or valve body sleeve may be used if desired.

In an embodiment of the magnetic valve according to the invention the sealing member is embodied as a rotationally symmetrical plunger, the plunger comprising a guide shaft disposed substantially in the valve body sleeve and a sealing region connected with the guide shaft. The plunger includes an inner bore through which the main flow of fluid flows in the direction of the main valve seat in the closed state of the check valve. The valve body sleeve also has at least one radial bore which enables the bypass flow of fluid in the open state of the check valve. Inside the valve body sleeve, the guide axis of the sealing member is guided radially by the seal. The sealing region of the sealing member is sealingly pressed against the edge of the valve body sleeve by the main flow of the fluid, and is separated from the edge of the valve body sleeve by the bypass flow of the fluid having an opposite flow direction to the main flow, This opens the check valve. The seal can be embodied, for example, as an O-ring, or as a channel-ring, disposed in the upper region of the guide shaft.

In another embodiment of the magnetic valve according to the invention the valve component supports the ring filter and / or the flat filter and directs the bypass flow to the second sealing lip against the fluid block by means of the first sealing lip against the valve body. Seal by The valve component can be assembled on the valve insert in a non positive or positive engagement manner and seals the valve cartridge about the periphery at the assembly position.

In another embodiment of the magnetic valve, the guide shaft comprises at its upper end a convex for gripping the channel ring, which is placed on the channel ring in the open state of the check valve and defines the stroke of the sealing member. Alternatively, the stroke of the sealing member may be defined by corresponding geometry pairs of the guide shaft and the valve body sleeve, such as corresponding ends, shoulders or the like, or by a planar filter.

By virtue of the embodiment of the magnetic valve according to the invention, the external dimensions are preferably reduced, thereby requiring less radial and axial space, obtaining a substantially symmetrical structure, integrating the parts of the functions, ie constituent members. Can perform a number of functions.

Preferred embodiments of the present invention described below and embodiments according to the above-described prior art are shown in the drawings to aid the understanding of this embodiment. Components or members having the same or similar function in the drawings are denoted by the same reference numerals.

1 is a schematic cross-sectional view of a magnetic valve according to the prior art with a check valve function,

2 is a schematic cross-sectional view of the components important in the invention of a first embodiment of a magnetic valve according to the invention with a check valve function,

3 is a schematic cross-sectional view of the components important in the invention of a second embodiment of a magnetic valve according to the invention with a check valve function.

As shown in FIGS. 2 and 3, the magnetic valve according to the invention comprises a valve cartridge 5, which valve valve 22, a closing member movably guided inside the valve insert 22. 7 and the valve body 10 embodied as a sleeve. A main valve is disposed between the fluid inlet 27 and the fluid outlet 26, the main valve being formed integrally with the closing member 7 and the hood of the valve body sleeve 10. And a main valve seat 12 disposed in the upper end of the mold and having a through opening. The closing member 7 is moved in the direction of the valve body 10 by a magnetic force generated by a magnetic subassembly, not shown, whereby the main sealing member 7.1 is sealingly inserted into the main valve seat 12. The main fluid flow pressurized against the main sealing member 7.1, embodied as a sealing hemisphere, for example, from the bottom can be adjusted. When implemented as a magnetic valve that opens without a current supply, the return spring keeps the main valve seat 12 open without a current supply. The check valve 25 arranged concentrically with respect to the main valve axis 1.1 in the bypass to the main valve comprises a sealing member 11 and a valve seat axially guided inside the valve body sleeve 10; The valve seat is formed by the lower edge 20 of the valve body sleeve 10 with an open end.

In order to move the closing member 7 relative to the valve body 10 when a current is supplied, a magnetic subassembly (not shown) that generates magnetic force and magnetic flux is similar to the magnetic subassembly 2 shown in FIG. 1. Can be implemented, comprising a housing outer wall 2.1, a winding carrier 2.2 coil winding 2.3 and a cover disc 2.4, wherein the coil winding 2.3 wound on the winding carrier 2.2 comprises electrical connections. Form a controllable electric coil through (2.5).

As shown in FIGS. 2 and 3, the sealing member is embodied as a rotationally symmetrical plunger 11, the plunger being substantially arranged in the valve body sleeve 10 and the sealing region connected with the guide shaft. (11.2), the plunger (11) comprises an inner bore (13) through which the main flow of fluid flows in the direction of the main valve seat (12) in the closed state of the check valve (25). In the case of the illustrated embodiment, the plunger 11 is embodied in one piece, whereby the sealing region 11.2 embodied as a cone is integrally formed in the guide shaft 11. 1. The lower edge 20 of the valve body sleeve 10 is embodied as a rounded edge, for example. Pure axial direction, in the case where the sealing of the check valve 25 is particularly small when the sealing of the check valve 25 by means of sealing of the sealing area 11.2 embodied as a cone on the lower edge 20 of the valve body sleeve 10, embodied as a rounded edge Improved compared to the sealed check valve structure. Alternatively, the sealing area 11.2 of the sealing member 11 can be embodied as a ball and the lower edge 20 can be embodied as a hollow cone or hollow ball. The valve body sleeve 10 also includes a plurality of radial bores 15, which enable bypass flow 28 of the fluid in the open state of the check valve 25. In the valve body sleeve 10, the guide shaft 11. 1 of the sealing member 11 is guided radially by the seal. By the main flow of the fluid, the sealing region 11. 2 of the sealing member 11 is sealedly pressed against the lower edge 20 of the valve body sleeve 10 and has a flow direction opposite to the main flow direction. By bypass flow 28, the sealing region 11. 2 of the sealing member 11 is separated from the lower edge 20 of the valve body sleeve 10. In the first embodiment according to FIG. 2 the seal is embodied as a channel ring 14 and in the second embodiment according to FIG. 3 the seal is embodied as an O-ring 14a arranged in the upper region of the guide shaft 11. 1. do.

In the lower region, the magnetic valve according to the invention is defined by a valve component 24, which supports the ring filter 16 and the flat filter 21. The valve component 24 also seals the bypass flow to the sealing body 10 by the first sealing lip 17 and to the fluid block 18 by the second sealing lip 24.2. The valve component 24 is assembled in a non positive or positive engagement manner on the valve insert 22 and seals the valve cartridge 5 about the periphery at the assembly position 23.

2 shows a first embodiment of a magnetic valve according to the invention with a check valve 25 in an open position, and a magnetic valve according to the invention with a check valve in a closed position in the right half. do. The newly designed valve body 10 in the form of a sleeve is used to receive the axially movable sealing member 11. The sealing member 11 embodied with the inner bore 13 permits a general main fluid flow in the direction of the main valve seat 12 and the lower edge of the valve body 10 with a sealing region 11.2 embodied as a cone. 20) or seal on the inner edge, the sealing area may alternatively have an embossed form, ball form, free form or the like. The sealing member 11 can be guided radially by a seal embodied as a channel ring 14, which enables the axial movement of the sealing member 11 without loss of resistance. The seal, embodied as channel ring 14, is pressure-supported by form or material, and as shown in the left half of FIG. Further forming a stroke stopper for (11.1), the convex portion 19 grips the channel ring 14 and contacts it on the channel ring 14 in the open position of the check valve 25. When the check valve 25 and thus the sealing member 11 are in the open position, the bypass flows through the radial bores 15 of the valve body 10 in which the working fluid may have a round or other shape suitable for flow. Flows along the arrow 28. The opposite flow direction of the main fluid flow forces the sealing member 11 to the closed state shown in the right half.

3 shows a second embodiment of the magnetic valve according to the invention with the check valve in the open position, and in the right half the magnetic valve according to the invention with the check valve 25 in the closed position. do. Unlike the first embodiment of the magnetic valve according to the invention, the seal is embodied as an O-ring 14a for the radial guide of the sealing member 11, the o-ring being in the axial direction of the sealing member 11. The movement is made possible without loss of tightness. The stroke of the sealing member 11 can in this embodiment be defined by corresponding geometry pairs of the guide shaft 11. 1 and the valve body sleeve 10, or the planar filter 21. Geometric pairs may be implemented, for example, as a stool, shoulder, or the like. Similar to the first embodiment according to FIG. 2, the working fluid flows along the bypass flow arrows 18 through the radial bores 15 of the valve body 10 in the open position of the check valve 25. I'm going. The opposite flow direction of the main fluid flow forces the sealing member 11 to the closed position shown in the right half.

The magnetic valve according to the invention preferably has a smaller outer dimension, thereby requiring less radial and axial space, having a substantially symmetrical structure, and achieving part integration of the functions.

Claims (10)

A magnetic valve comprising a magnetic subassembly and a valve cartridge (5), The valve cartridge comprises a valve insert 22, a closing member 7 and a valve body 10 movably guided in the valve insert 22, between the fluid inlet 27 and the fluid outlet 26. A main valve is disposed in the main valve, the main valve including a main sealing member (7.1) connected with the closing member (7) and a main valve seat (12) disposed in the valve body (10). The magnetic force generated by this moves the closing member 7 in the direction of the valve body 10, the main sealing member 7.1 is sealingly inserted into the main valve seat 12, and the main valve axis 1.1. In a magnetic valve comprising a sealing member 11 and a valve seat, a check valve 25 is arranged in a bypass to the main valve coaxially with respect to the valve. Implemented as the sleeve The sealing member 11 of the check valve 25 is axially guided, the main valve seat 12 having a through opening is disposed on the hooded end of the valve body sleeve 10, and the check valve The sealing member (11) of the valve seat in cooperation with the valve seat, the valve seat being formed with an edge (20) of the valve body sleeve (10) with the end open. 2. The sealing area (11.2) of the sealing member (11) according to claim 1, wherein the sealing area (11.2) is a cone or ball, wherein the edge (20) of the valve body sleeve (10) is embodied as a rounded edge, hollow cone or hollow ball. Magnetic valve. 3. The guide shaft (11. 1) and the guide shaft (11. 1) according to claim 1, wherein the sealing member is embodied as a rotationally symmetrical plunger (11), the plunger being substantially disposed in the valve body sleeve (10). And a sealing region 11. 2, wherein the plunger 11 comprises an inner bore 13, through which the main flow of fluid is closed in the closed state of the check valve 25. A magnetic valve, which flows in the direction of the seat 12. 4. The valve body sleeve of claim 1, wherein the valve body sleeve 10 comprises at least one radial bore 15, the radial bore being in the open state of the check valve 25. Magnetic valve, characterized by enabling a bypass flow (28) of fluid. The guide shaft 11. 1 of claim 1, wherein the guide shaft 11. 1 of the sealing member 11 is guided radially in the valve body sleeve 10 by a seal 14. 14a. The sealing region 11. 2 of the sealing member 11 is sealingly pressed against the edge 20 of the valve body sleeve 10 by the main flow of the fluid and in a direction opposite to the main flow. Magnetic valve, characterized in that it is separated from the edge (20) of the valve body sleeve (10) by a bypass flow (28) of fluid. 6. Magnetic valve according to claim 5, characterized in that the seal is embodied as an O-ring or a channel ring (14) disposed in the upper region of the guide shaft (11.1). The valve component member 24 according to any one of claims 1 to 6, which supports the ring-shaped filter 16 and / or the flat filter 21, the valve component member 24 is bypassed. Magnetic valve, characterized in that the flow is sealed to the valve body (10) by a first sealing lip (24.1) and to the fluid block (18) by a second sealing lip (24.2). 8. Magnetic valve according to claim 7, characterized in that the valve component (24) is assembled on the valve insert (22) in a non positive or positive coupling manner. 9. The guide shaft (11.1) according to any one of claims 5 to 8, wherein the guide shaft (11.1) comprises a convex portion (19) for gripping the channel ring (14) at its upper end and the convex portion is provided with the check valve (25). Magnetic valve in contact with the channel ring (14) in the open state and limiting the stroke of the sealing member (11). 9. The stroke according to claim 5, wherein the stroke of the sealing member 11 corresponds to pairs of geometric shapes of the guide shaft 11. 1 and the valve body sleeve 10, or the planar filter 21. Magnetic valve, characterized in that defined by.

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