Electromagnetic device and valve
By introducing a yoke sealing unit into the electromagnetic device, a more compact design and higher energy efficiency are achieved, solving the problems of insufficient energy efficiency and compactness in the prior art.
Patent Information
- Application Number
- CN202510791117.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-06-14
- Filing Date
- 2025-06-13
- Publication Date
- 2025-12-16
AI Technical Summary
The energy efficiency and compactness of existing electromagnetic devices need to be improved, especially in the design of magnetic flux guidance and magnetic circuit structure.
By employing a yoke sealing unit, particularly a sealing element and magnetic flux guide within the armature's range of motion, higher magnetic flux guidance and conduction are achieved through the sealing element. This results in higher sealed magnetic flux guidance, a more compact design, and reduced magnetic flux loss and current consumption.
This resulted in a more compact design, reduced magnetic flux loss and current consumption, and improved energy efficiency.
Smart Images
Figure CN121148844A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The invention relates to an electromagnetic device and to a valve. BACKGROUND
[0002] An electromagnetic device has been proposed, which has at least one coil body, a magnetic coil wound on the coil body, and a magnetic circuit, which comprises at least a magnetic core, an armature movably supported relative to the magnetic core, and a yoke unit having at least one armature-side yoke portion and at least one magnetic core-side yoke portion, which is realized separately from the armature-side yoke portion, which is configured to guide a magnetic flux producible by the magnetic coil between the magnetic core-side yoke portion and the armature.
[0003] It is an object of the invention in particular to provide a versatile device with advantageous energy efficiency. This object is achieved by the features of the main claim of the invention, while advantageous embodiments and further improvements of the invention can be obtained from the features of the other dependent claims. SUMMARY
[0004] The invention is based on an electromagnetic device having at least one coil body, a magnetic coil wound on the coil body, and a magnetic circuit, which comprises at least a magnetic core, an armature movably supported relative to the magnetic core, and a yoke unit having at least one armature-side yoke portion and at least one magnetic core-side yoke portion, which is realized separately from the armature-side yoke portion, wherein the armature-side yoke portion is configured to guide a magnetic flux / magnetic field producible by the magnetic coil between the magnetic core-side yoke portion and the armature.
[0005] It is proposed that the electromagnetic device comprises a yoke sealing unit, in particular at least for sealing the movement range of the armature / coil body, the armature guide range of which, having at least one first sealing element and at least one second sealing element, the first sealing element abutting against the armature-side yoke portion in a sealing manner, preferably in a gas-tight manner, on a first side of the armature-side yoke portion, and the second sealing element abutting against the armature-side yoke portion in a sealing manner, preferably in a gas-tight manner, on a second side of the armature-side yoke portion, which is opposite the first side. This advantageously enables a more compact design, which in particular comprises fewer different individual components and / or which in particular allows for a smaller distance between the armature, the magnetic coil and the yoke unit. Advantageously, a particularly narrow magnetic circuit can be obtained. Thus, while maintaining a sufficiently high magnetic force, a reduction in size of the coil winding and thus a reduction in copper consumption and current consumption of approximately 30% can be achieved advantageously. By sealing the armature-side yoke portion by means of the yoke sealing unit, a separate (sealed) core tube / armature guide tube can advantageously be dispensed with between the armature and the yoke unit.
[0006] The magnetic coil is in particular realized as a copper wire wound onto a coil body. The magnetic circuit is preferably realized as an at least mostly closed magnetic circuit, preferably as a completely closed magnetic circuit, except for a magnetic reluctance gap and production tolerances. The magnetic core is in particular arranged in the electromagnetic device in a position fixed relative to the coil body and / or the magnetic coil. The magnetic core preferably comprises a soft magnetic material with a high magnetic saturation flux density and a high magnetic permeability, for example iron, a ferromagnetic metal alloy or a ferrimagnetic material. The magnetic core is in particular configured for the (low-loss) accumulation of the magnetic flux generated upon energization of the magnetic coil. The armature can be realized from the same or a similar material as the magnetic core. The armature is preferably linearly movable towards the magnetic core or linearly movable away from the magnetic core, depending on the energization of the magnetic coil. The magnetic yoke unit preferably realizes a magnetic return path between the armature and the magnetic core. The armature side yoke portion is configured to guide the magnetic flux generated between the armature and the magnetic core side yoke portion upon energization of the magnetic coil. The armature side yoke portion preferably contacts the magnetic core side yoke portion with at least one surface subregion. The armature side yoke portion preferably almost contacts the armature. Preferably, only a minimal air gap is arranged between the surface subregion of the armature side yoke portion which almost contacts the armature and the armature. The magnetic core side yoke portion is configured to guide the magnetic flux generated between the magnetic core and the armature side yoke portion upon energization of the magnetic coil. The magnetic core side yoke portion preferably contacts the armature side yoke portion with at least one surface subregion. The magnetic core side yoke portion preferably contacts the magnetic core in a surface subregion of the magnetic core side yoke portion.
[0007] The yoke sealing unit is in particular configured to form a fluid-tight, preferably gas-tight seal at least in the movement range of the armature. The movement range of the armature is preferably not sealed relative to the flow-through area of a valve comprising the electromagnetic device, which valve can be switched by the armature. The yoke sealing unit is therefore preferably also configured to seal the flow-through area of a valve comprising the electromagnetic device. “Configured” in particular means specially programmed, designed and / or equipped. An object configured for a specific function is in particular to be understood as meaning that the object fulfils and / or performs the specific function in at least one application state and / or operating state. The first sealing element is realized and arranged completely circumferentially around the movement axis of the armature / around the movement range of the armature. The second sealing element is realized and arranged completely circumferentially around the movement axis of the armature / around the movement range of the armature. The first sealing element and / or the second sealing element extend in a radial plane perpendicular to the movement axis of the armature. The first sealing element preferably abuts against the outer side of the armature side yoke portion. The first side of the armature side yoke portion is preferably the outer side of the armature side yoke portion. The second sealing element preferably abuts against the inner side of the armature side yoke portion. The second side of the armature side yoke portion is preferably the inner side of the armature side yoke portion. Alternatively, however, the first side and the second side can also be the upper side and the lower side of the armature side yoke portion. The second sealing element preferably extends within the first sealing element. The sealing elements are in particular arranged coaxially with one another. The sealing elements can both lie in a common radial plane (relative to the movement axis of the armature or relative to a respective dedicated central axis) or can lie in different radial planes parallel to one another.
[0008] In another aspect of the application, which can be considered alone or also in combination with at least one, in particular one, of any number of other aspects of the application, it is proposed that the armature side yoke portion is embodied as at least a single-stage yoke disc, preferably as exactly a single-stage yoke disc. This advantageously allows a high degree of energy efficiency to be achieved, in particular by advantageous magnetic flux guidance and / or by achieving an effective axial seal of the movement range of the armature towards the outside, which in turn enables a more compact implementation of the electromagnetic device. The armature side yoke portion is preferably stepped in the axial direction. The axial direction is preferably oriented parallel to the central axis of the (rotationally symmetrical) armature side yoke portion and / or to the movement axis of the armature. The at least single-stage yoke disc / armature side yoke portion preferably has at least two sub-areas, which are separated from one another and in particular arranged on different steps, and in which the respective surfaces of the armature side yoke portion extend parallel to one another and perpendicular to the central axis of the (rotationally symmetrical) armature side yoke portion and / or to the movement axis of the armature. In particular, a further surface of the armature side yoke portion is located between the two surfaces and extends perpendicular to the other two surfaces and / or parallel to the central axis of the (rotationally symmetrical) armature side yoke portion and / or to the movement axis of the armature. By "yoke disc" is in particular meant a component which in the specified mounting position has a maximum extent in the radial direction (perpendicular to the movement axis of the armature) which is substantially greater than the maximum extent of the component in the axial direction (parallel to the movement axis of the armature) perpendicular thereto. It is conceivable for the armature side yoke portion to be a two-stage step, a three-stage step or a step of more than three stages, but the armature side yoke portion is preferably exactly a single-stage step only.
[0009] Furthermore, it is proposed that the first sealing element and / or the second sealing element is embodied as a radial sealing element. This advantageously allows an axial seal to be obtained, in particular with the above-mentioned advantages associated therewith. The radial sealing element is preferably a sealing ring, for example an O-ring or a profiled sealing ring. The central axis of the radial sealing element is preferably oriented parallel to the movement axis of the armature. The central axis of the radial sealing element preferably overlaps the central axis of the armature guide range of the coil body / movement range of the armature. The radial sealing element prevents the fluid from flowing axially beyond the radial sealing element. Apart from the radius, the two sealing elements can be embodied identically; the two sealing elements can in particular have the same cross-sectional area.
[0010] Furthermore, it is proposed that a sealing section be formed in the intermediate region between the two radial end regions, within which the armature-side yoke forms a sealing section, in which the first and second sealing elements sealably abut against the armature-side yoke. This advantageously allows for simple assembly and / or a high and reliable sealing effect. In particular, the two sealing elements are arranged in the intermediate region of the stepped yoke disc. The respective radial end regions of the armature-side yoke extend at least 5%, preferably at least 10%, more preferably at least 15%, and particularly preferably at most 25%, above the total surface of the armature-side yoke (especially the main surface different from the edge surface) starting specifically from the respective radial end edge. The intermediate region preferably does not overlap with the radial end regions.
[0011] Furthermore, within the sealing section, the surface of the armature-side yoke extends axially, particularly at least substantially parallel, to the axis of motion of the armature and / or the central axis of the sealing element. This advantageously allows for axial sealing, particularly with the aforementioned associated advantages. "Substantially parallel" here specifically refers to an orientation (especially in a plane) relative to a reference direction, wherein the difference between this direction and the reference direction is particularly less than 8°, advantageously less than 5°, and particularly advantageously less than 2°. At the location where the sealing element is arranged, the surface of the stepped yoke preferably extends vertically. Therefore, the (outer) first sealing element preferably surrounds the (inner) second sealing element.
[0012] Furthermore, if the surface of the end edge face of the armature-side yoke, which differs from that of the armature-side yoke, extends radially within the two radial end regions, particularly at least substantially perpendicular to the axis of motion of the armature, advantageous magnetic flux guidance can be achieved. This, in particular, allows for a compact design and / or a reduction in copper material in the magnetic coil. The ends of the stepped yoke preferably point radially.
[0013] In addition, it is proposed that the surface of the armature-side yoke (specifically different from the surface of the end edge face of the armature-side yoke) abuts against and contacts the magnet core-side yoke in one of the two radial end regions. This allows for advantageous magnetic flux guidance, which in particular allows for a compact design and / or a reduction in copper material in the magnetic coil.
[0014] Furthermore, the surface of the armature side yoke, which forms the end edge face of the armature side yoke in one of the two radial end regions, forms a guide surface for guiding the axial movement of the armature. This allows for advantageous magnetic flux guidance and / or a compact design. In particular, the armature side yoke directly defines the range of motion of the armature. Preferably, no other physical elements are arranged between the surface of the armature side yoke facing the armature and forming the end edge face of the armature side yoke in the radial end region and the armature.
[0015] In addition, it is proposed that the armature be guided directly within the coil body, and preferably without a core tube, armature guide tube, etc. This advantageously allows for a compact design, which in turn allows for a reduction in the winding material of the magnetic coil and a reduction in the energy required for operation, especially without causing functional impairment. In particular, the surface of the coil body defining the range of motion of the armature is area-wise flush with the surface of the armature side yoke, which faces the armature and forms the end edge surface of the armature side yoke in the radial end region.
[0016] The electromagnetic device also includes one or more venting and / or venting channels that allow air to flow axially through the armature, and which are at least indirectly sealed to the outside via a yoke sealing unit. This advantageously allows for the integration of venting and venting functions into a compact design, offering the aforementioned advantages in material and energy efficiency. The yoke sealing unit specifically ensures that air (except at valve connections) can only escape from the valve including the electromagnetic device via the venting and / or venting channels.
[0017] If one or more venting and / or exhaust slots are arranged in the coil body, preferably all venting and / or exhaust slots, it is advantageous to maximize the magnetic force, especially since the flux-guiding material of the armature can fill the armature's range of motion to the maximum extent. Advantageously, the armature can be implemented without venting and / or exhaust slots. In particular, the coil body includes two, three, four, or more than four venting and / or exhaust slots. In particular, the venting and / or exhaust slots are arranged in a regular manner around the armature's range of motion. The venting and / or exhaust slots of the coil body are preferably straight. The venting and / or exhaust slots of the coil body preferably have a constant slot cross-section in the axial direction. The venting and / or exhaust slots preferably extend over the total axial range of the coil body region that directly defines the range of motion of the armature. In particular, the venting and / or exhaust slots of the coil body open at one end into the magnetic reluctance gap of the magnetic circuit.
[0018] If one or more venting and / or venting slots continue in the armature-side yoke, effective venting and / or venting of the armature can advantageously be achieved. Furthermore, it is advantageous to position a large portion of the armature-side yoke (particularly in the edge region outside the venting and / or venting slots facing the armature's range of motion) as close as possible to the armature. This advantageously allows for particularly effective magnetic flux guidance. Specifically, the armature-side yoke has venting and / or venting recesses in the radial end region facing the armature's range of motion, directly adjacent to the venting and / or venting slots of the coil body, such that a particularly at least substantially undeflected airflow is preferably achieved between the venting and / or venting slots and the venting and / or venting recesses. Specifically, the armature-side yoke has a number of venting and / or venting recesses corresponding to the number of venting and / or venting slots of the coil body. Specifically, the venting and / or venting slots (preferably the venting and / or venting recesses of the armature-side yoke) open at one end into a flow area of a valve including a solenoid device.
[0019] Furthermore, it is proposed that the armature be formed into a cylindrical, particularly slotless, and preferably planar running surface, especially a cylindrical shell running surface. This advantageously allows for the maximization of magnetic force, particularly since the flux-guiding material of the armature can fill the range of motion of the armature to the greatest extent. Moreover, it enables particularly simple and cost-effective production of the armature.
[0020] As an alternative to arranging venting and / or exhaust slots in the coil body, it is proposed to arrange one or more venting and / or exhaust slots (preferably all venting and / or exhaust slots) in the armature. This advantageously allows for a particularly simple and cost-effective design of the coil body. Furthermore, the armature side yoke can advantageously be implemented without venting and / or exhaust recesses. Advantageously, the entire edge region of the radial end of the armature side yoke can be made particularly close to the range of motion of the armature. In particular, the armature includes two, three, four, or more than four venting and / or exhaust slots. Specifically, the venting and / or exhaust slots are arranged in a regular manner around the armature. The venting and / or exhaust slots of the armature are preferably straight. The venting and / or exhaust slots of the armature preferably have a constant slot cross-section in the axial direction. The venting and / or exhaust slots preferably extend over the total axial range of the armature. Specifically, the vent and / or exhaust slot of the armature is connected at one end to the magnetic reluctance gap of the magnetic circuit. Specifically, the vent and / or exhaust slot of the armature is connected at one end to the flow area of a valve including an electromagnetic device.
[0021] Alternatively, it is also conceivable that the armature and coil body include venting and / or exhaust channels that may overlap or not overlap each other. This advantageously allows for the respective adaptation of the aforementioned benefits of the two alternatives.
[0022] Furthermore, it is proposed that the core-side yoke be implemented as a U-shaped yoke. This allows for an advantageous construction. Advantageously, good, efficient, and / or compact magnetic flux guidance can be achieved. In particular, the maximum axial range of the U-shaped yoke (parallel to the armature's axis of motion) is substantially greater than the maximum radial range of the U-shaped yoke perpendicular to it. The U-shaped yoke preferably engages around the core on at least two oppositely positioned sides (particularly the radial sides). In particular, the axial end region of the core passes through the U-shaped yoke in the axial direction. The U-shaped yoke has a recess provided for this purpose.
[0023] It is also proposed that the magnetic core include an axial ventilation and / or exhaust channel, which specifically allows for the axial transport of air discharged from one or more ventilation and / or exhaust slots. In this way, efficient ventilation of the armature can be advantageously achieved. Advantageously, a high degree of armature mobility can be achieved. The ventilation and / or exhaust channel preferably extends centrally through the magnetic core. The ventilation and / or exhaust channel preferably has a cross-section that is substantially the same as or larger than that of the ventilation and / or exhaust slots combined.
[0024] In addition, the proposed electromagnetic device includes a one-piece / integral vent cap that allows air from the axial ventilation and / or venting passage of the magnetic core to escape from the electromagnetic device to the outside, while simultaneously preventing air from entering the electromagnetic device from the outside. This allows for advantageous venting functionality for the electromagnetic device. Advantageously, venting can be ensured solely through the vent cap by means of a yoke sealing unit. The vent cap is arranged adjacent to the end of the ventilation and / or venting passage opposite to the armature.
[0025] Furthermore, an electromagnetic device is proposed comprising a core sealing unit that seals the core toward the coil body. This advantageously allows for the prevention of leakage. Advantageously, venting can be ensured only via a vent and / or vent groove – vent and / or vent channel – vent cap path. The core sealing unit is implemented separately from and distinct from the yoke sealing unit. The core sealing unit is particularly arranged in the end region of the electromagnetic device away from the armature, while the yoke sealing unit is arranged in the end region of the electromagnetic device facing the armature. The core sealing unit particularly abuts against the surface of the core in a sealing manner, preferably in an airtight manner. The core sealing unit particularly abuts against the surface of the coil body facing the core in a sealing manner, preferably in an airtight manner. The core sealing unit is preferably implemented as a radial seal, particularly a sealing ring.
[0026] Furthermore, a valve, particularly a venting and / or exhaust valve for pneumatic systems (e.g., pneumatic systems of vehicles such as trucks), is proposed, which has an electromagnet including an electromagnetic device. This advantageously allows for the provision of a valve with the aforementioned advantages. The valve is preferably a three-way two-position (3 / 2-way) valve. However, alternatively, the valve can be a two-way two-position (2 / 2-way) valve. The valve is closed in the absence of current. However, alternatively, the valve can also be implemented to open in the absence of current.
[0027] The electromagnetic device and valve according to the invention are not limited to the applications and embodiments described above. In particular, in order to achieve the functions described herein, the electromagnetic device and valve according to the invention may have a number of individual elements, components, and units different from those given herein. Attached Figure Description
[0028] Further advantages will become apparent from the description of the following figures. Two exemplary embodiments of the invention are illustrated in the figures. The combination of the figures, description, and claims contains numerous features. Those skilled in the art will also purposefully consider these features individually and will find further advantageous combinations.
[0029] In the attached diagram: Figure 1 Two schematic cross-sectional views of a valve having an electromagnet including an electromagnetic device are shown, and Figure 2 Two schematic cross-sectional views of a valve having an electromagnet that includes an alternative electromagnetic device are shown. Detailed Implementation
[0030] Figure 1 Two sectional views of valve 72a are schematically shown. The sectional views are separated by line 76a. A vertical section passing through half of valve 72a is shown to the left of line 76a. A similar section passing through half of valve 72a is shown to the right of line 76a, wherein the section to the right of line 76a is made perpendicular to the section to the left of line 76a.
[0031] Valve 72a is implemented as a venting and / or exhaust valve for a pneumatic system. Valve 72a includes an electromagnet 74a. Electromagnetic element 74a is an electromagnetic reluctance actuator. Electromagnetic element 74a includes an electromagnetic device 68a. As an example, electromagnetic device 68a fully implements electromagnetic element 74a. Electromagnetic device 68a includes a coil body 10a. Electromagnetic device 68a includes a magnetic coil 12a. Magnetic coil 12a is wound on coil body 10a. Electromagnetic device 68a includes an armature 18a. Electromagnetic device 68a includes a magnetic core 16a. Armature 18a is movably supported. Armature 18a is supported so that it can move linearly along axis of motion 48a. Armature 18a is movably supported relative to magnetic core 16a. Armature 18a is guided directly in coil body 10a. Armature 18a is guided independently of core tube, armature guide tube, etc. The electromagnetic device 68a does not have an armature guiding element, such as a core tube or armature guide tube, that is implemented separately from the coil body 10a. The coil body 10a at least partially forms the range of motion 28a of the armature 18a. The coil body 10a directly defines at least a portion of the range of motion 28a of the armature 18a. The range of motion 28a is a hollow space in which the armature 18a can preferably move linearly.
[0032] Valve 72a includes two valve ports 78a and 80a. Armature 18a is configured to selectively close or release the connection between the two valve ports 78a and 80a. Valve 72a includes a valve seat 82a. Armature 18a includes a valve seal 84a. The connection between the two valve ports 78a and 80a can be closed by the valve seal 84a being placed on the valve seat 82a via movement of the armature 18a within a range of motion 28a generated by the magnetic field of the magnetic coil 12a, and can be opened by lifting the valve seal 84a from the valve seat 82a. Valve 72a includes a valve body 86a. Valve body 86a surrounds the components of the electromagnetic device 68a.
[0033] The electromagnetic device 68a includes a magnetic circuit 14a. The magnetic circuit 14a includes an armature 18a. The magnetic circuit 14a includes a magnetic core 16a. The magnetic circuit 14a includes a yoke unit 20a. The yoke unit 20a includes an armature-side yoke 22a and a core-side yoke 24a implemented separately from the armature-side yoke 22a. The armature-side yoke 22a is implemented as a precise single-stage yoke. The core-side yoke 24a is implemented as a U-shaped yoke. In the exemplary embodiment shown, no additional yokes are provided. However, it is conceivable that the yoke unit 20a includes more than two separate yokes 22a and 24a. The magnetic coil 12a generates a magnetic flux / magnetic field when energized. Depending on the magnetic flux, the armature 18a is moved / set to one of multiple armature positions. The armature-side yoke 22a is configured to guide the magnetic flux generated by the magnetic coil 12a between the core-side yoke 24a and the armature 18a. The core-side yoke 24a is configured to guide the magnetic flux generated by the magnetic coil 12a between the armature-side yoke 22a and the magnetic core 16a.
[0034] The electromagnetic device 68a includes a yoke sealing unit 26a. The yoke sealing unit 26a is configured to seal the range of motion 28a of the armature 18a. The yoke sealing unit 26a includes a first sealing element 30a. The first sealing element 30a is implemented as a radial sealing element. The first sealing element 30a abuts against the armature-side yoke 22a in a sealing manner on a first side 34a of the armature-side yoke 22a. The yoke sealing unit 26a includes a second sealing element 32a. The second sealing element 32a is implemented as a radial sealing element. The second sealing element 32a abuts against the armature-side yoke 22a in a sealing manner on a second side 36a of the armature-side yoke 22a, the second side 36a being opposite to the first side 34a. The electromagnetic device 68a also includes a core sealing unit 70a. The core sealing unit 70a is different from and implemented separately from the yoke sealing unit 26a. The core sealing unit 70a seals the core 16a toward the coil body 10a. The magnetic core sealing unit 70a is implemented as an annular radial sealing device.
[0035] The armature-side yoke 22a forms a sealing section 46a. A first sealing element 30a seals against the armature-side yoke 22a within the sealing section 46a. A second sealing element 32a seals against the armature-side yoke 22a within the sealing section 46a. The sealing section 46a is located in the intermediate region 42a of the armature-side yoke 22a. The intermediate region 42a is located between two relatively positioned radial end regions 38a and 40a of the armature-side yoke 22a. The surface 44a of the armature-side yoke 22a within the sealing section 46a extends axially. The surface 44a of the armature-side yoke 22a within the sealing section 46a extends parallel to the axis of motion 48a of the armature 18a. Surfaces 52a and 54a of the armature-side yoke 22a extend radially, located within the two radial end regions 38a and 40a of the armature-side yoke 22a, and distinct from the end edge surfaces 50a and 56a of the armature-side yoke 22a. Surfaces 52a and 54a of the armature-side yoke 22a extend perpendicularly to the axis of motion 48a of the armature 18a, located within the two radial end regions 38a and 40a of the armature-side yoke 22a, and distinct from the end edge surfaces 50a and 56a of the armature-side yoke 22a. Surface 52a of the armature-side yoke 22a abuts against and contacts the core-side yoke 24a within the associated radial end region 38a, and this surface 52a and 54a is distinct from the end edge surfaces 50a and 56a of the armature-side yoke 22a. Another surface 58a of the armature side yoke 22a forms an end edge surface 56a of the armature side yoke 22a in the radial end region 40a facing the armature 18a among the two radial end regions 38a and 40a, and also forms a guide surface for guiding the axial movement of the armature 18a.
[0036] The electromagnetic device 68a includes a vent and / or exhaust channel 60a (see [link]). Figure 1 (Right side). In principle, the electromagnetic device 68a includes additional venting and / or venting channels 60a, which are implemented in the same manner. However, for simplicity, the characteristics of the venting and / or venting channel 60a will be described below with reference to a single venting and / or venting channel 60a, which will serve as an example of all possible additional venting and / or venting channels 60a. The venting and / or venting channel 60a allows air to flow axially through the armature 18a. The venting and / or venting channel 60a provides at least indirect external sealing via the yoke sealing unit 26a. The yoke sealing unit 26a ensures that air not flowing between valve ports 78a and 80a flows away through the venting and / or venting channel 60a and does not escape from valve 72a via any other path.
[0037] Vent and / or venting slot 60a is arranged only in the coil body 10a. The armature 18a does not have vent and / or venting slot 60a. The armature 18a includes a cylindrical slotless running surface 62a. The vent and / or venting slot 60a continues in the armature side yoke 22a. The armature side yoke 22a has a vent and / or venting recess 88a. The vent and / or venting recess 88a continues the vent and / or venting slot 60a of the coil body 10a only in the cross-sectional area of the vent and / or venting slot 60a. The cross-sections of the vent and / or venting slot 60a and / or the vent and / or venting recess 88a overlap.
[0038] The magnetic core 16a includes an axial ventilation and / or exhaust channel 64a. The ventilation and / or exhaust channel 64a allows air discharged from the ventilation and / or exhaust groove 60a on the side of the armature 18a facing the magnetic core 16a to be axially transported. The ventilation and / or exhaust channel 64a passes completely through the magnetic core 16a in the axial direction 90a of the electromagnetic device 68a. The axial direction 90a is parallel to the axis of motion 48a of the armature 18a. The central axes of the sealing elements 30a and 32a, the sealing unit 26a, and the sealing device of the magnetic core sealing unit 70a are also parallel to the axial direction 90a.
[0039] The electromagnetic device 68a includes an exhaust cap 66a. The exhaust cap 66a is implemented in a one-piece manner. The exhaust cap 66a is arranged in the exhaust path of the electromagnetic device 68a, which is downstream of the vent and / or exhaust channel 64a and downstream of the vent and / or exhaust slot 60a. The exhaust cap 66a allows air exhausted from the axial vent and / or exhaust channel 64a of the magnetic core 16a to escape from the electromagnetic device 68a to the outside. The exhaust cap 66a simultaneously prevents air from entering the electromagnetic device 68a from the outside.
[0040] The electromagnetic device 68a includes a mechanical reset element 92a. In the absence of current, the reset element 92a is configured to deflect the armature 18a to the base position. Figure 1 The base position is illustrated exemplarily. In this example, the reset element 92a is implemented as a compression spring. In the base position, the valve seal 84a is mounted on the valve seat 82a and closes the connection between the two valve ports 78a, 80a. Simultaneously, venting is possible between one of the valve ports 78a and the vent cap 66a via the vent and / or vent passage 64a and the vent and / or vent groove 60a. The magnetic core 16a implements another valve seat 94a. The armature 18a includes another valve seal 96a. The other valve seal 96a is arranged on the side of the armature 18a opposite to the valve seal 84a. By mounting the other valve seal 96a on the other valve seat 94a, the vent and / or vent passage 64a of the magnetic core 16a can be closed. The other valve seat 94a is arranged at the inlet of the vent and / or vent passage 64a. When the magnetic coil 12a is energized, the armature 18a is pulled into the magnetic coil 12a, causing the other valve seal 96a to seal tightly against the other valve seat 94a, thus closing the vent and / or exhaust passage 64a. Therefore, venting via the exhaust cap 66a and / or the vent and / or exhaust groove 60a is no longer possible. However, simultaneously, by lifting the valve seal 84a from the valve seat 82a, the flow connection between the two valve ports 78a and 80a is opened.
[0041] exist Figure 2 Another exemplary embodiment of the invention is illustrated below. The following description and drawings are essentially limited to the differences between the exemplary embodiments, wherein, with respect to parts having the same name, and particularly to parts having the same reference numerals, reference may also be made in principle to another exemplary embodiment (especially...). Figure 1 The accompanying drawings and / or description are provided. To distinguish exemplary embodiments, in... Figure 1 The letter 'a' has been added to the reference numerals of the exemplary embodiments. Figure 2 In an exemplary embodiment, the letter 'a' is replaced by the letter 'b'.
[0042] Figure 2 Two sectional views of valve 72b are schematically shown. The sectional views are separated by line 76b. A vertical section passing through half of valve 72b is shown to the left of line 76b. A similar section passing through half of valve 72b is shown to the right of line 76b, wherein the section to the right of line 76b has been made perpendicular to the section to the left of line 76b.
[0043] Valve 72b includes an electromagnet 74b having an alternative electromagnetic device 68b. The alternative electromagnetic device 68b includes a coil body 10b, with a magnetic coil 12b wound around it. The alternative electromagnetic device 68b includes a magnetic circuit 14b having an armature 18b, a magnetic core 16b, and a yoke unit 20b, which includes an armature-side yoke 22b and a core-side yoke 24b. The alternative electromagnetic device 68b includes a vent and / or exhaust channel 60b (see [link to documentation]). Figure 2 (Left side). In principle, the alternative electromagnetic device 68b includes additional venting and / or exhaust channels 60b, which are implemented in the same manner. However, for simplicity, the characteristics of the venting and / or exhaust channel 60b will be described below for a single venting and / or exhaust channel 60b, which will serve as an example of all possible additional venting and / or exhaust channels 60b. The venting and / or exhaust channel 60b allows air to flow axially through the armature 18b. The venting and / or exhaust channel 60b is arranged only in the armature 18b. The coil body 10b does not have venting and / or exhaust channels 60b. The venting and / or exhaust channels 60b form recesses in the operating surface 62b of the armature 18b.
[0044] Figure Labels 10 coil body 12 magnetic coils 14 Magnetic Circuit 16 magnetic cores 18 Armature 20 Magnetic Yoke Units 22. Armature side yoke 24. Magnetic core side yoke 26 Yoke sealing units 28 Range of motion 30 First sealing element 32 Second sealing element 34 First side 36 Second side 38 Radial end region 40 Radial end region 42. Middle area 44 Surface 46 Sealed Section 48. Motion axis 50 End edge face 52 Surface 54 Surface 56 End edge surface 58 Surface 60 Ventilation and / or exhaust channels 62 Operating Surface 64 Ventilation and / or exhaust channels 66 Exhaust Cap 68 Electromagnetic devices 70 Magnetic Core Sealing Unit 72 valve 74 Electromagnets 76 lines 78 Valve Port 80 valve port 82 Valve seat 84 Valve Seals 86 valve housing 88 Ventilation and / or exhaust recess 90 axial direction 92 Reset Element 94 Another valve seat 96 Another valve seal
Claims
1. An electromagnetic device (68a-b), the electromagnetic device (68a-b) having at least one coil body (10a-b), a magnetic coil (12a-b) wound on the coil body (10a-b), and a magnetic circuit (14a-b), the magnetic circuit (14a-b) comprising at least: - Magnetic core (16a-b). - An armature (18a-b), which is movably supported relative to the magnetic core (16a-b), and - A yoke unit (20a-b), the yoke unit (20a-b) having at least one armature-side yoke portion (22a-b) and at least one core-side yoke portion (24a-b), the core-side yoke portion (24a-b) being implemented separately from the armature-side yoke portion (22a-b). The armature-side yoke (22a-b) is configured to guide magnetic flux between the core-side yoke (24a-b) and the armature (18a-b), the magnetic flux being generated by the magnetic coil (12a-b); The yoke sealing unit (26a-b) is characterized in that it is particularly used to seal at least the range of motion (28a-b) of the armature (18a-b), the yoke sealing unit (26a-b) having at least one first sealing element (30a-b) and at least one second sealing element (32a-b), the first sealing element (30a-b) abutting against the armature-side yoke (22a-b) on a first side (34a-b) of the armature-side yoke (22a-b) in a sealing manner, and the second sealing element (32a-b) abutting against the armature-side yoke (22a-b) on a second side (36a-b) of the armature-side yoke (22a-b) in a sealing manner, the second side (36a-b) being opposite to the first side (34a-b).
2. The electromagnetic device (68a-b) according to claim 1, characterized in that, The armature side yoke (22a-b) is implemented as at least a single-stage yoke disk, preferably a precise single-stage yoke disk.
3. The electromagnetic device (68a-b) according to claim 1 or 2, characterized in that, The first sealing element (30a-b) and / or the second sealing element (32a-b) are implemented as radial sealing elements.
4. The electromagnetic device (68a-b) according to any one of the preceding claims, characterized in that, In the intermediate region (42a-b) located between the two radial end regions (38a-b, 40a-b), the armature side yoke (22a-b) forms a sealing section (46a-b), in which the first sealing element (30a-b) and the second sealing element (32a-b) sealably abut against the armature side yoke (22a-b).
5. The electromagnetic device (68a-b) according to claim 4, characterized in that, Within the sealed section (46a-b), the surface (44a-b) of the armature side yoke (22a-b) extends axially with respect to the axis of motion (48a-b) of the armature (18a-b), and in particular, at least substantially parallel to the axis of motion (48a-b) of the armature (18a-b).
6. The electromagnetic device (68a-b) according to claim 4 or 5, characterized in that, Within the two radial end regions (38a-b, 40a-b), the surfaces (52a-b, 54a-b) of the armature side yoke (22a-b) extend radially to the axis of motion (48a-b) of the armature (18a-b), and in particular, extend radially at least substantially perpendicular to the axis of motion (48a-b) of the armature (18a-b). The surfaces (52a-b, 54a-b) are different from the end edge surfaces (50a-b, 56a-b) of the armature side yoke (22a-b).
7. The electromagnetic device (68a-b) according to any one of claims 4 to 6, characterized in that, In one of the two radial end regions (38a-b, 40a-b), the surface (52a-b) of the armature side yoke (22a-b) abuts against and contacts the core side yoke (24a-b), the surface (52a-b) being particularly different from the end edge surfaces (50a-b, 56a-b) of the armature side yoke (22a-b).
8. The electromagnetic device (68a-b) according to any one of claims 4 to 7, characterized in that, The surface (58a-b) of the armature side yoke (22a-b) forms a guide surface for guiding the axial movement of the armature (18a-b), wherein the surface (58a-b) forms the end edge surface (56a-b) of the armature side yoke (22a-b) in one of the two radial end regions (38a-b, 40a-b).
9. The electromagnetic device (68a-b) according to any one of the preceding claims, characterized in that, The armature (18a-b) is guided directly in the coil body (10a-b), and preferably there is no core tube, armature guide tube, etc.
10. The electromagnetic device (68a-b) according to any one of the preceding claims, characterized in that... One or more venting and / or venting channels (60a-b) allow air to flow axially through the armature (18a-b), and the one or more venting and / or venting channels (60a-b) are at least indirectly sealed to the outside by the yoke sealing unit (26a-b).
11. The electromagnetic device (68a) according to claim 10, characterized in that, The coil body (10a) contains one or more ventilation and / or exhaust slots (60a), preferably all ventilation and / or exhaust slots (60a).
12. The electromagnetic device (68a) according to claim 11, characterized in that, The one or more ventilation and / or exhaust channels (60a) continue in the armature side yoke (22a).
13. The electromagnetic device (68a) according to any one of the preceding claims, characterized in that, The armature (18a) forms a cylindrical, in particular slotless running surface (62a).
14. The electromagnetic device (68b) according to claim 10, characterized in that, The armature (18b) is provided with one or more ventilation and / or exhaust slots (60b), preferably all ventilation and / or exhaust slots (60b).
15. The electromagnetic device (68a-b) according to any one of the preceding claims, characterized in that, The core-side yoke (24a-b) is implemented as a U-shaped yoke.
16. The electromagnetic device (68a-b) according to any one of the preceding claims, particularly the electromagnetic device (68a-b) according to any one of claims 11, 12 or 14, is characterized in that, The magnetic core (16a-b) includes axial ventilation and / or exhaust channels (64a-b), which specifically allow axial transport of air discharged from the one or more ventilation and / or exhaust slots (60a-b).
17. The electromagnetic device (68a-b) according to claim 16, characterized in that... A one-piece exhaust cap (66a-b) allows air discharged from the axial ventilation and / or exhaust passage (64a-b) of the magnetic core (16a-b) to escape from the electromagnetic device (68a-b) to the outside, while preventing air from entering the electromagnetic device (68a-b) from the outside.
18. The electromagnetic device (68a-b) according to any one of the preceding claims, characterized in that... A magnetic core sealing unit (70a-b) seals the magnetic core (16a-b) toward the coil body (10a-b).
19. A valve (72a-b), particularly a venting and / or exhaust valve for a pneumatic system, the valve (72a-b) having an electromagnet (74a-b) comprising an electromagnetic device (68a-b) according to any one of the preceding claims.