Valve mechanism and valve

Abstract

The invention is based on a valve mechanism (22), in particular a pressure regulating valve mechanism, having at least one armature (10), having at least one core tube (12) which receives the armature (10), and having at least one bearing unit (14) for linearly movably mounting the armature (10) in the core tube (12). According to the invention the bearing unit (14) provides a two-point sliding bearing for the armature (10).

Description

[0001] State of the art

[0002] The invention relates to a valve device according to the preamble of claim 1, a valve according to claim 16 and a method according to the preamble of claim 17.

[0003] A valve device with at least one magnet armature, with at least one core tube receiving the magnet armature, and with at least one bearing unit for a linearly movable mounting of the magnet armature in the core tube has already been proposed.

[0004] The object of the invention is, in particular, to provide a generic device with advantageous properties with regard to sealing. This object is achieved according to the invention by the features of claims 1, 16, and 17, while advantageous embodiments and further developments of the invention can be found in the subclaims.

[0005] Advantages of the invention

[0006] The invention is based on a valve device, in particular a pressure control valve device, preferably for gases, with at least one magnet armature, with at least one core tube receiving the magnet armature, and with at least one bearing unit for a linearly movable mounting of the magnet armature in the core tube.

[0007] For the proportional behavior of a valve, in particular a pressure control valve, preferably for gases, its tightness is particularly relevant. To advantageously optimize, in particular increase, the tightness of the valve device, it is proposed that the bearing unit provide a two-point plain bearing for the magnet armature. Furthermore, to optimize the proportional behavior of the valve, it is advantageous if hysteresis in a flow-current characteristic curve of the valve is as low as possible. In particular, since the hysteresis of the flow-current characteristic curve of the valve is at least partially determined by friction of the magnet armature in a magnetic core of the valve / core tube, the proposed two-point plain bearing can advantageously achieve a particularly low hysteresis of the flow-current characteristic curve.This is particularly due to the low friction forces for magnet armature movements that can be advantageously achieved using the two-point plain bearing.

[0008] The valve device preferably forms at least one part, in particular a functional component, of a valve, in particular a pressure control valve. The valve, in particular a pressure control valve, is preferably intended for flow control of fluids, such as gas and / or liquids, preferably only gases. A "core tube" is to be understood in particular as a component of a magnetic actuator of the valve made of a magnetic flux-conducting (magnetic flux-bundling), in particular (soft) magnetic, preferably ferromagnetic, material, which preferably at least largely forms the magnetic core of the magnetic actuator and / or which is at least partially, preferably at least largely, arranged in a coil interior of a magnetic coil of the magnetic actuator. In particular, the magnetic material is designed as a magnetic material. In particular, the core tube is made at least largely of a magnetic steel.In particular, the core tube forms an inductance together with at least one magnetic coil of the magnetic actuator. In particular, the core tube is at least partially and / or at least on one side tubular. In particular, the core tube is provided to at least partially accommodate the magnetic armature of the valve. In particular, the core tube is provided to at least partially form a displacement chamber for the magnetic armature of the valve. In particular, the longitudinal direction of the core tube runs parallel to a tube axis, in particular a rotational symmetry axis, of at least one tubular part of the core tube. In particular, the longitudinal direction of the core tube, when mounted in a magnetic actuator, runs parallel to a coil axis of the magnetic coil of the magnetic actuator. “Provided” should be understood in particular to mean specially programmed, designed and / or equipped.The fact that an object is intended for a specific function should be understood in particular to mean that the object fulfils and / or executes this specific function in at least one application and / or operating state.

[0009] The magnet armature is designed in particular as a linearly movable armature. In particular, the armature is intended to interact with an electromagnetic field of the magnetic coil of the magnetic actuator. In particular, the magnet armature is intended to experience a force, in particular a kinetic force, as a result of the interaction with the electromagnetic field of the magnetic coil. Preferably, the force acting on the magnet armature as a result of the interaction with the electromagnetic field of the magnetic coil moves the magnet armature at least linearly along the core tube. The magnet armature forms in particular a movable magnetic core, in particular an iron core, of the magnetic actuator. The magnet armature can be formed at least partially, preferably at least for the most part, from soft iron (sheet or solid material).Alternative magnet armature materials, such as silicon-iron alloys (electrical steel), nickel-iron alloys, cobalt-iron alloys, aluminum-iron alloys or ferrite materials, are also conceivable. In particular, the magnetic actuator forms an electromagnet. The magnet armature can have an at least substantially cylindrical outer shape. Preferably, the magnet armature is mounted in the core tube so that it can move in the axial direction of its cylindrical outer shape. In particular, the bearing unit forms a guide element for the movement of the magnet armature. The bearing unit is intended in particular for a mechanical bearing of the magnet armature. In particular, the bearing unit forms a machine element. A “two-point plain bearing” is to be understood in particular as a bearing by means of one or more plain bearings, in which the mounted object (here: the magnet armature orone or more guide rods of the valve device that are firmly connected to the magnet armature) contact the bearing unit, in particular the plain bearing(s) of the bearing unit, preferably at least during a bearing movement / sliding movement, only with two limited surface areas of the object. The limited surface areas of the object are preferably substantially smaller than a continuous lateral surface of the object. The limited surface areas can, for example, be approximately point-shaped or approximately linear, wherein in the second case the line is significantly shorter than a longitudinal extension and / or a transverse extension of the magnet armature. In particular, the two limited surface areas are arranged at opposite end regions of the mounted object (e.g. the combination of magnet armature and guide rod).

[0010] It is further proposed that the bearing unit comprise two separate plain bearings, in particular linear plain bearings. This advantageously allows a compact design to be achieved. A two-point plain bearing can advantageously be provided. In particular, a plain bearing is a machine element intended to reduce friction between two surfaces moving against each other. In particular, the two plain bearings support and guide the magnet armature or a shaft or axis (guide rod) connected to the magnet armature, which moves relative to a bearing housing of the respective plain bearing. In particular, one plain bearing guides / contacts a shaft or axis (guide rod) and the other plain bearing the magnet armature. In particular, the plain bearings are free of lubricants. Alternatively, however, the use of lubricants in at least one of the plain bearings is also conceivable.

[0011] If the two plain bearings are arranged on, in particular axially opposite, sides of the magnet armature and / or the core tube, a particularly advantageous two-point plain bearing arrangement can be achieved. A particularly large bearing spacing can advantageously be achieved. In particular, at least one of the plain bearings is arranged along an axial direction of the valve device outside a magnet armature guide region of the core tube. Preferably, both plain bearings are arranged along the axial direction of the valve device outside the magnet armature guide region of the core tube. In particular, at least one of the plain bearings is spaced apart in the axial direction from a magnetic field-guiding part of the magnet armature. Preferably, both plain bearings are spaced apart in the axial direction from the magnetic field-guiding part of the magnet armature.

[0012] It is also proposed that at least one of the two plain bearings, preferably the two plain bearings each, are arranged, in particular axially, outside the core tube and / or outside a magnet armature guide region of the valve device, in which a magnetic flux-carrying part of the magnet armature can be arranged. This makes it possible to achieve a particularly advantageous two-point plain bearing. Advantageously, a particularly large bearing spacing can be achieved. Advantageously, particularly small contact areas between the magnet armature and / or the guide rod(s) and the plain bearings can be achieved. In particular, the plain bearings are arranged within a sealed, in particular pressure-tight, region of the valve. In particular, the plain bearings are arranged in an interior region of the valve connected to the magnet armature guide region of the core tube.

[0013] Furthermore, it is proposed that the two plain bearings be aligned coaxially with each other. This allows for a particularly advantageous linear guide.

[0014] Furthermore, it is proposed that the two plain bearings be designed as hollow-cylindrical plain bearing sleeves with different bearing diameters. This allows for a particularly advantageous two-point bearing arrangement. Furthermore, a compact design can be advantageously achieved. The respective bearing diameters correspond, in particular, to a guide diameter of the respective plain bearings. The respective bearing diameters correspond, in particular, to an opening diameter of the respective plain bearings.

[0015] It is also proposed that the valve device comprise a guide rod connected to a base body of the magnet armature, which guide rod is mounted in direct contact by one of the two plain bearings. This makes it possible to achieve a particularly advantageous two-point plain bearing arrangement with particularly small contact areas. Advantageously, a particularly large bearing spacing can be achieved. In particular, the guide rod is firmly fixed in the magnet armature. The guide rod can, for example, be screwed, pressed, or welded into a central receptacle of the magnet armature. The guide rod preferably projects axially beyond the magnet armature. In particular, the axial directions of the guide rod and the magnet armature run at least parallel to one another and preferably overlap one another.

[0016] Furthermore, it is proposed that the guide rod have an end or a shoulder tapering the guide rod, which is arranged within the plain bearing contacting the guide rod in every possible movement position of the guide rod, in particular representing an actual operating state of the valve. This makes it possible to achieve a particularly advantageous two-point plain bearing with particularly small contact areas. Advantageously, the contact area at which the guide rod contacts the plain bearing is formed in a defined region of the guide rod, in particular at an end edge of the guide rod forming the end of the guide rod or at the shoulder of the guide rod.The fact that an object / an object region is arranged within a plain bearing should be understood in particular that the object / the object region is encompassed / covered in the radial direction by the respective plain bearing sleeve of the respective plain bearing. If the end edge of the guide rod forming the end of the guide rod or a step edge of the guide rod forming a transition step of the shoulder of the guide rod is provided with a crown, a contact surface of the contact region between the guide rod and the plain bearing can advantageously be minimized. This advantageously makes it possible to achieve particularly low frictional forces. In particular, due to the design according to the invention, during operation of the valve / during movement of the magnet armature in the core tube, a slight tilting of the magnet armature and the guide rod occurs due to bearing play in the coaxially arranged plain bearings.By creating the crown at the end edge of the guide rod or at the transition step of the guide rod, the magnet armature, tilted in this way, then runs on a very small, in particular almost point-like, contact area in the associated guide rod-side plain bearing. Without the crown and without the transition step or end shoulder in the area of ​​the plain bearing, the contact area would be significantly larger, e.g., linear, which could result in a significantly higher friction force and thus potentially an undesirable increase in hysteresis. Crowning is a type of flank modification. To create crowning, for example, material can be removed from one or more ends of a flank. Crowning of flanks is known, for example, from the edges of gears, particularly spur gears.

[0017] It is further proposed that the valve device has a return element arranged at least partially in the core tube, which engages around the guide rod in the circumferential direction.

[0018] Furthermore, it is proposed that only one of the two plain bearings directly contact the magnet armature, in particular a base body of the magnet armature. This allows a particularly advantageous two-point plain bearing arrangement with particularly small contact areas to be achieved. Advantageously, a particularly large bearing spacing can be achieved. In particular, this plain bearing contacts the magnet armature in a part of the magnet armature that protrudes axially beyond the core tube, in particular the magnet armature guide area of ​​the core tube. In particular, this plain bearing contacts the magnet armature in a reduced-diameter part of the magnet armature.

[0019] If the base body of the magnet armature has a shoulder that tapers the magnet armature and is arranged within the plain bearing contacting the magnet armature in every possible movement position of the magnet armature, in particular representing an actual operating state of the valve, a particularly advantageous two-point plain bearing with particularly small contact areas can be achieved. Advantageously, the contact area where the magnet armature touches the plain bearing is formed in a defined region of the magnet armature, in particular at the shoulder of the guide rod. In particular, the shoulder tapers the magnet armature by at least 10%, preferably at least 20%, more preferably by at least 25%, and particularly preferably by at most 75%.It is also conceivable that the taper forms a further taper of an end region of the magnet armature that is already tapered relative to a maximum diameter of the magnet armature / to a part of the magnet armature arranged in the magnet armature guide region of the core tube.

[0020] Preferably, the shoulder tapering the magnet armature and arranged in the plain bearing is already part of a higher-level taper of the diameter of the magnet armature.

[0021] If a shoulder edge of the magnet armature, forming a transition step of the shoulder of the magnet armature, is provided with a crown, the contact surface of the contact area between the magnet armature and the plain bearing contacting the magnet armature can advantageously be minimized. This advantageously makes it possible to achieve particularly low frictional forces. By implementing the crown at the transition step of the magnet armature, the tilted magnet armature then runs on a very small, in particular almost point-like, contact area in the associated (magnet armature-side) plain bearing. Particularly in combination with the crown of the end edge or the shoulder of the guide rod, particularly low friction can be achieved. This advantageously makes it possible to further reduce the hysteresis of the valve device, so that particularly good proportionality can be achieved for valves having the valve device.By implementing the crowning in the sliding areas of both components of the valve device sliding in the sliding bearings, it can advantageously be achieved that the actuatable part of the valve device is in contact with the environment only at two points, one in one sliding bearing and one in the other sliding bearing. Preferably, all other outer surfaces of the magnet armature are non-contact with the core tube. Preferably, all other radial outer surfaces of the magnet armature are completely non-contact with components of the valve that surround the magnet armature in the radial direction. Preferably, all other outer surfaces of the guide rod are non-contact with the core tube. Preferably, all other radial outer surfaces of the guide rod are completely non-contact with components of the valve other than the magnet armature.

[0022] It is also proposed that the valve device have a valve nozzle component forming a valve seat for a sealing element of the magnet armature, wherein the plain bearing supporting the magnet armature in contact is mounted, in particular pressed or welded, in the valve nozzle component. This advantageously reduces play in the magnet armature due to the mounting in the valve nozzle component. Advantageously, this, and in particular because the magnet armature always closes a nozzle of the valve nozzle component at the same point, results in little variance in the sealing impression and thus preferably in improved valve tightness. In particular, the core tube is aligned coaxially with the valve nozzle component. In particular, the plain bearing supporting the magnet armature in contact is aligned coaxially with the valve nozzle component and / or with the core tube.The coaxiality of the valve device is primarily defined by a fit between the core tube and the valve nozzle component, the plain bearing clearance of the two plain bearings, and / or the concentricity of the guide rod in the magnet armature. The better the coaxiality, the lower the friction in the plain bearings. In particular, the core tube can be provided with a wrench size. As an alternative to pressing in or welding the plain bearing to the valve nozzle component, the plain bearing could also be glued into the valve nozzle component, connected to the valve nozzle component by a positive fit, or held down by the core tube in a positive fit. In particular, the valve nozzle component comprises a nozzle of the valve. The nozzle can preferably be closed by the magnet armature sitting on the valve seat. The nozzle can preferably be opened by the magnet armature being lifted off the valve seat.The sealing element of the magnet armature can be designed as an elastomer component that is vulcanized onto the magnet armature or otherwise connected to the magnet armature.

[0023] Additionally, it is proposed that the crowning of the stepped edge of the magnet armature and / or the crowning of the stepped edge and / or the end edge of the guide rod be polished and / or burnished. This advantageously creates a particularly smooth sliding surface. This advantageously allows for particularly low friction forces during the movement of the magnet armature and / or a particularly long service life of the valve.

[0024] If the magnet armature is mounted in the core tube without contact, at least with the core tube, apart from one or more axial stops, a particularly low overall friction can advantageously be achieved.

[0025] Furthermore, the valve, in particular the pressure control valve, is proposed with the electromagnet, which comprises the valve device. This advantageously allows for optimizing the proportional behavior of the valve, in particular a flow-current characteristic curve of the valve.

[0026] Furthermore, a method for operating the valve having the magnet armature, in particular a pressure control valve, is proposed, wherein the magnet armature is mounted for axial movement only via the two-point plain bearing. This advantageously allows a proportional behavior of the valve, in particular a flow-current characteristic of the valve, to be optimized. The valve device according to the invention, the valve according to the invention, and the method according to the invention are not intended to be limited to the application and embodiment described above. In particular, the valve device according to the invention, the valve according to the invention, and the method according to the invention can have a number of individual elements, components, and units that differs from a number stated herein in order to fulfill a function described herein.

[0027] Drawings

[0028] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an exemplary embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0029] They show:

[0030] Fig. 1 is a schematic sectional view of a valve with a valve device,

[0031] Fig. 2 is an enlargement of part of the sectional view of Figure 1 and

[0032] Fig. 3 is a schematic flow diagram of a method for operating the valve.

[0033] Description of the embodiments

[0034] Figure 1 shows a schematic sectional view of a valve 56. The valve 56 is designed as a pressure control valve. The valve 56 is provided for controlling and / or regulating a gas flow. The valve 56 is sealed to the outside. The valve 56 has a flow-current characteristic curve. The flow-current characteristic curve is approximately proportional. The valve 56 comprises a magnetic actuator 60. The magnetic actuator 60 is provided for generating a linear movement of a valve actuator. In the case shown in Figure 1, the valve actuator is designed as a magnetic armature 10 of the valve 56 provided with a sealing element 52. The valve 56 comprises an electromagnet 58. The electromagnet 58 forms part of the magnetic actuator 60. The magnetic actuator 60, in particular the electromagnet 58, has a valve device 22. The valve device 22 forms a pressure control valve device.

[0035] The valve device 22 comprises the magnet armature 10. The valve device 22 comprises a magnet core 62. The magnet core 62 comprises a core tube 12. The magnet armature 10 is received in the core tube 12. The magnet armature 10 is mounted for linear movement in the core tube 12. The magnet armature 10 is mounted for linear movement along two opposite linear movement directions 76, 78. The core tube 12 forms a magnet armature guide region 20. The magnet armature 10 is only movable within the magnet armature guide region 20 defined by the core tube 12. The electromagnet 58 comprises a magnet coil 64. The magnet coil 64 is provided for generating a magnetic field, which can exert a force on the magnet armature 10 that moves the magnet armature 10. The valve device 22 has a valve nozzle component 54. The valve-nozzle component 54 includes a nozzle 66. The nozzle 66 serves to inlet gas into the valve device 22.The valve-nozzle component 54 has a valve seat 50. The valve seat 50 surrounds an opening edge of an inner opening of the nozzle 66. The magnet armature 10 has the sealing element 52. The magnet armature 10 is designed to either sit on the valve seat 50 (depending on the setting of the magnet coils 64) or be lifted off the valve seat 50. The valve device 22 has a gas outlet 68. When the magnet armature 10 sits on the valve seat 50, the nozzle 66 is closed to the gas outlet 68. When the magnet armature 10 is lifted off the valve seat 50, the nozzle 66 is open to the gas outlet 68.

[0036] In the illustrated case, activation of the magnetic field of the magnetic coil 64 creates a tendency for the magnetic armature 10 to close an air gap 70 to the magnetic core 62 and thus lift the magnetic armature 10 from the valve seat 50. A stop and / or anti-stick element 74 is arranged in the air gap 70 between the magnetic armature 10 and the magnetic core 62. When the magnetic field of the magnetic coil 64 is switched off, a spring element 72 of the valve device 22 generates a mechanical deflection of the magnetic armature 10 toward the valve seat 50. The spring element 72 is designed as a compression spring supported between the magnetic core 62 and the magnetic armature 10.

[0037] The magnet armature 10 has a base body 34. The base body 34 is essentially cylindrical in shape. The base body 34 has a receptacle for a guide rod 36 on one axial side 18 of the magnet armature 10. The base body 34 has a receptacle for the sealing element 52 on an opposite axial side 28. The base body 34 is stepped twice on the axial side 28 facing the valve seat 50. With each of the steps of the base body 34 of the magnet armature 10, an outer diameter of the base body 34 decreases. The mutually stepped partial regions of the base body 34 are each cylindrical and aligned coaxially with one another. The base body 34 of the magnet armature 10 has a magnetic flux-carrying part 24. The magnetic flux-conducting part 24 of the base body 34 is predominantly formed by the unstepped region and / or the region of the base body 34 guided in the magnet armature guide region 20 of the core tube 12.The magnetic flux-carrying part 24 of the magnet armature 10 is arranged in the magnet armature guide area 20.

[0038] The valve device 22 has the guide rod 36. The guide rod 36 is fixedly connected to the base body 34 of the magnet armature 10. The guide rod 36 protrudes axially from the magnet armature 10. The guide rod 36 is positioned axially centrally in the magnet armature 10. The spring element 72 engages around the guide rod 36. The guide rod 36 extends into the magnet core 62. A guide rod 36 is arranged only on one axial side 18 of the magnet armature 10. The other side 28 of the magnet armature 10 is free of a guide rod 36. The guide rod 36 is arranged on a side 18 of the magnet armature 10 opposite the sealing element 52.

[0039] The magnet armature 10 is mounted in the core tube 12 without contact, except for one or more axial stops on the core tube 12. The valve device 22 has a bearing unit 14. The bearing unit 14 is provided for linearly movable mounting of the magnet armature 10 in the core tube 12. The bearing unit 14 provides a two-point plain bearing for the magnet armature 10. The bearing unit 14 comprises two separate plain bearings 16, 26. The two plain bearings 16, 26 are each designed as hollow cylindrical plain bearing sleeves. The two plain bearings 16, 26 are arranged on opposite axial sides 18, 28 of the magnet armature 10 and the core tube 12. A first plain bearing 16 of the two plain bearings 16, 26 is arranged outside the core tube 12. The first plain bearing 16 is arranged outside the magnet armature guide area 20. A second plain bearing 26 of the two plain bearings 16, 26 is arranged outside the core tube 12.The second plain bearing 26 is arranged outside the magnet armature guide area 20. The first plain bearing 16 and the second plain bearing 26 are arranged and aligned coaxially with each other. The two plain bearings 16, 26 are arranged coaxially with the guide rod 36. The two plain bearings 16, 26 are arranged coaxially with the nozzle 66. The first plain bearing 16 has a first bearing diameter 30. The second plain bearing 26 has a second bearing diameter 32. The bearing diameters 30, 32 are different. The second bearing diameter 32 is at least substantially larger than the first bearing diameter 30. The second bearing diameter 32 is more than twice, preferably more than three times, the size of the first bearing diameter 30.

[0040] The first plain bearing 16 supports the guide rod 36 for axial movement. The first plain bearing 16 supports the guide rod 36 in direct contact. The guide rod 36 has an axial end 38. The axial end 38 is arranged in every possible (normal operation-related) movement position of the guide rod 36 within the first plain bearing 16 contacting the guide rod 36. Alternatively, the guide rod 36 could also have a tapered shoulder, which, instead of the end 38, is arranged in every possible (normal operation-related) movement position of the guide rod 36 within the first plain bearing 16 contacting the guide rod 36. The first plain bearing 16 is mounted in the magnetic core 62 (e.g., pressed in, glued in, welded in, etc.).

[0041] The end 38 of the guide rod 36 forms an end edge 40 of the guide rod 36. The end edge 40 of the guide rod 36 is provided with a crown 42. In the alternative case with the tapered shoulder, a transition step of the shoulder would form a step edge of the guide rod 36, which in turn would then be provided with the crown 42. The crown 42 of the end edge 40 and / or the step edge of the guide rod 36, in particular a surface of the end edge 40 and / or the step edge having the crown 42, is polished and / or burnished.

[0042] The second plain bearing 26 supports the magnet armature 10 for linear movement. The second plain bearing 26 supports the magnet armature 10 in direct contact. The second plain bearing 26 makes direct contact with the base body 34 of the magnet armature 10. The base body 34 of the magnet armature 10 has a shoulder 44 that tapers the magnet armature 10. The shoulder 44 that tapers the magnet armature 10 is arranged in every possible (normal operation-related) movement position of the magnet armature 10 within the second plain bearing 26 that contacts the magnet armature 10. The second plain bearing 26 is mounted in the valve nozzle component 54 (e.g., pressed in, glued in, welded in, etc.). The term "normal operation-related" movement positions should be understood in particular to mean the positions of the magnet armature 10 that can be reached by the magnet armature 10 during regular operation of the valve 56.

[0043] The shoulder 44 of the magnet armature 10 forms a transition step (see also Fig. 2). The shoulder 44 forming the transition step forms a shoulder edge 46. The base body 34 of the magnet armature 10 comprises the shoulder edge 46 in the region of the transition step. The shoulder edge 46 is provided with a crown 48. The crown 48 of the shoulder edge 46 of the magnet armature 10, in particular a surface of the shoulder edge 46 having the crown 48, is polished and / or rolled.

[0044] Fig. 3 shows a schematic flow diagram of a method for operating the valve 56 having the magnet armature 10. In at least one

[0045] In operating step 80, in particular during regular operation of the valve 56, the magnet armature 10 is mounted in an axially movable manner only via the two-point plain bearing.

[0046] Reference symbol

[0047] 10 magnet armatures

[0048] 12 core tube

[0049] 14 storage unit

[0050] 16 plain bearings

[0051] 18 page

[0052] 20 Magnet armature guide area

[0053] 22 Valve device

[0054] 24 Magnetic flux-carrying part

[0055] 26 plain bearings

[0056] 28 page

[0057] 30 bearing diameters

[0058] 32 bearing diameters

[0059] 34 basic bodies

[0060] 36 Guide rod

[0061] 38 End

[0062] 40 End edge

[0063] 42 Crowning

[0064] 44 paragraph

[0065] 46 heel edge

[0066] 48 Crowning

[0067] 50 valve seat

[0068] 52 Sealing element

[0069] 54 Valve nozzle component

[0070] 56 Valve

[0071] 58 Electromagnet

[0072] 60 magnetic actuator

[0073] 62 magnetic core

[0074] 64 solenoid coil

[0075] 66 Nozzle Gas outlet Air gap Spring element Stop and / or anti-stick element Linear movement direction Linear movement direction Operating step

Claims

Claims 1. Valve device (22), in particular a pressure control valve device, with at least one magnet armature (10), with at least one core tube (12) receiving the magnet armature (10), and with at least one bearing unit (14) for a linearly movable mounting of the magnet armature (10) in the core tube (12), characterized in that the bearing unit (14) provides a two-point sliding bearing for the magnet armature (10).

2. Valve device (22) according to claim 1, characterized in that the bearing unit (14) has two separate plain bearings (16, 26).

3. Valve device (22) according to claim 2, characterized in that the two plain bearings (16, 26) are arranged on opposite sides (18, 28) of the magnet armature (10) and / or the core tube (12).

4. Valve device (22) according to claim 2 or 3, characterized in that at least one of the sliding bearings (16), preferably the two sliding bearings (16, 26), are arranged outside the core tube (12) and / or outside a magnet armature guide region (20) of the valve device (22) in which a magnetic flux-carrying part (24) of the magnet armature (10) can be arranged.

5. Valve device (22) according to one of claims 2 to 4, characterized in that the two plain bearings (16, 26) are aligned coaxially with each other.

6. Valve device (22) according to one of claims 2 to 5, characterized in that the two plain bearings (16, 26) are designed as hollow cylindrical plain bearing sleeves with different bearing diameters (30, 32).

7. Valve device (22) according to one of claims 2 to 6, characterized by a guide rod (36) connected to a base body (34) of the magnet armature (10), which is mounted in direct contact by one of the two plain bearings (16, 26).

8. Valve device (22) according to claim 7, characterized in that the guide rod (36) has an end (38) or a shoulder tapering the guide rod (36), which is arranged in every possible movement position of the guide rod (36) within the sliding bearing (16) contacting the guide rod (36).

9. Valve device (22) according to claim 8, characterized in that an end edge (40) of the guide rod (36) forming the end (38) of the guide rod (36) or a step edge of the guide rod (36) forming a transition step of the shoulder of the guide rod (36) is provided with a crown (42).

10. Valve device (22) according to one of claims 2 to 9, characterized in that only one of the two plain bearings (16, 26) supports the magnet armature (10), in particular a base body (34) of the magnet armature (10), in direct contact.

11. Valve device (22) according to claim 10, characterized in that the base body (34) of the magnet armature (10) has a shoulder (44) tapering the magnet armature (10), which is arranged in every possible movement position of the magnet armature (10) within the sliding bearing (26) contacting the magnet armature (10).

12. Valve device (22) according to claim 11, characterized in that a shoulder edge (46) of the magnet armature (10) forming a transition step of the shoulder (44) of the magnet armature (10) is provided with a crown (48).

13. Valve device (22) according to one of claims 10 to 12, characterized by a valve nozzle component (54) forming a valve seat (50) for a sealing element (52) of the magnet armature (10), wherein the sliding bearing (26) contacting the magnet armature (10) is mounted in the valve nozzle component (54).

14. Valve device (22) according to claim 9 and / or 12, characterized in that the crowning (48) of the shoulder edge (46) of the magnet armature (10) and / or the crowning (42) of the step edge and / or the end edge (40) of the guide rod (36) is polished and / or rolled.

15. Valve device (22) according to one of the preceding claims, characterized in that the magnet armature (10), apart from one or more axial stops, is mounted in the core tube (12) without contact, at least with the core tube (12).

16. Valve (56), in particular pressure control valve, with an electromagnet (58) which has a valve device (22) according to one of the preceding claims.

17. A method for operating the valve (56) having the magnet armature (10) according to claim 16, characterized in that the magnet armature (10) is mounted for axial movement only via a two-point sliding bearing.

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