JP6496112B2 - Residual air gap disk for magnetic module - Google Patents

Description

  The invention relates to a residual air gap disk for a magnetic module having the features of the preamble of claim 1. The invention further relates to a magnetic module comprising such a residual air gap disk.

  A residual air gap disk for a magnetic module is known, for example, from US Pat. No. 6,057,049, which has a residual air gap between an end face of a magnetic core of a magnetic module and an armature capable of moving up and down. Play the role of adjusting. The armature is preferably coupled to the valve member so that the valve member can be operated through the lifting and lowering movement of the armature. Accordingly, the proposed residual air gap disk is preferably employed in a magnetic module for a solenoid valve. In order to allow volume compensation when the armature moves up and down, the residual air gap disk disclosed in that document flows through a plurality of kidney-shaped notches arranged at equal angular intervals from each other. It has as an opening. In addition, the annular area of the residual air gap disk surrounding the kidney-shaped cutout forms a closed outer circumference that is intended to prevent the individual residual air gap disk from being caught during handling.

German Patent Application Publication No. 102008001891A1

  An object of the present invention against the background of the above prior art is to provide a residual air gap disk for a magnetic module, which can simplify the structure of the magnetic module. Furthermore, it is intended to provide a magnetic module that is simply configured.

  In order to solve this problem, a residual air gap disk having the constituent elements of claim 1 and a magnetic module having the constituent elements of claim 6 are proposed. Preferred developments of the invention emerge from the respective dependent claims.

  According to the present invention, a residual air gap disk proposed for adjusting a residual air gap between a magnetic core of a magnetic module and an armature capable of moving up and down is configured as a spring member according to the present invention. It can be used to wake up the child. Therefore, this residual air gap disk can serve as a return spring, thereby eliminating the return spring. By integrating or omitting the function of the return spring as a separate component, the structure of the magnetic module can be simplified, and at the same time, it can be constructed at a lower cost.

  In one preferred embodiment of the invention, the residual air gap disc is configured in the form of a disc spring. That is, the residual air gap disk is further configured to be relatively flat. This is especially true when compared to compression coil springs commonly used as return springs. Accordingly, the structure including the magnetic module, the residual air gap disk, and the armature can be configured to be particularly compact. Unlike compression coil springs that receive torsion and bending loads, disc springs only receive bending loads. Therefore, the robustness of the structure is also improved by the configuration of the residual air gap disk as a disc spring.

  More preferably, the residual air gap disk is made of a non-magnetizable material. In this way, the residual air gap disk can be further used for magnetic separation between the magnetic core and the armature, and in that sense, can perform a further function. The magnetic division is for preventing a magnetic short circuit between the magnetic core and the armature or preventing the armature from adhering to the magnetic core, thereby ensuring the return of the armature.

  The residual air gap disk preferably has a first placement surface for placement in contact with the magnetic core and a second placement surface for placement in contact with the armature. The residual air gap disk is reliably supported by the magnetic core and the armature at least temporarily through these mounting surfaces. Both of these mounting surfaces are arranged in areas of the residual air gap disk that are spaced apart from one another in the axial direction and are connected to one another in particular via at least one web. The coupling between the two areas is such that when the residual air gap disc is urged by the pressing force, the axial distance between both areas, i.e. the axial distance between the mounting surfaces constructed in these areas, Can be selected to be variable. When the connection is made via only one web, this web is preferably configured as a spring arm. When multiple webs are provided for bonding, these webs are mutually connected to achieve as even a load distribution as possible in the area where the residual air gap disk is supported by the magnetic core and / or armature. It is preferable to arrange them at equal angular intervals. The mutual angular spacing of the webs is preferably selected so that a sufficiently wide opening remains between each web, for example as a flow-through opening for the medium flowing around the armature during operation of the magnetic module. In this way, volume compensation when the armature moves up and down is possible.

  In principle, the mounting surface for supporting the residual air gap disk with the magnetic core and / or the armature may be arbitrarily configured. However, in one preferred embodiment, the at least one mounting surface is configured as a disk or ring. That is, the at least one mounting surface is configured to be rotationally symmetric, thus enabling an even load distribution. This improves the robustness of the residual air gap disk configured as a spring member. For example, the residual air gap disk may be configured in a cup shape and may have a disc-shaped first zone as well as an annular second zone surrounding the first zone, with these zones between them. Are connected to one another via preferably diagonally extending wall or web sections.

  It has been found that a mounting surface as wide as possible is particularly preferred. This is because such a mounting surface acts to prevent undesirable particle formation.

  In the residual air gap disk according to the invention, the return spring and the residual air gap disk, which are normally separately configured components, are integrated into one component. The configuration of the residual air gap disk is preferably done in the form of a disc spring, the specific configuration and sizing taking into account the existing design space, the forces generated and / or the required switching time Can be done on top.

  Furthermore, in order to solve the problems described at the beginning, a magnetic module having an armature and a residual air gap disk according to the present invention is proposed, and the residual air gap disk is arranged between the magnetic core and the armature. Since the residual air gap disc according to the present invention is configured as a spring member, it can replace the return spring normally disposed between the magnetic core and the armature. Thus, the residual air gap disk allows one component to be omitted, so that the proposed structure consisting of a magnetic module, armature, and residual air gap disk is simpler than the corresponding known structure. It can be manufactured at low cost.

  If the residual air gap disk is configured in the form of a disc spring, the structure consisting of the magnetic module, the armature, and the residual air gap disk can be configured to be a more particularly compact structure. This is because disc springs generally require less design space than compression coil springs. Furthermore, disc springs are usually more robust. This is because the compression coil spring is subjected not only to bending but also torsional load. This in turn has a positive effect on the service life of the claimed structure consisting of a magnetic module, an armature and a residual air gap disk.

  For further advantages of the residual air gap disc according to the invention, reference is made to the advantages already mentioned above in connection with the description of the residual air gap disc.

  In one preferred embodiment of the present invention, the proposed magnetic module further includes an annular magnetic coil that surrounds the residual air gap disk. The magnetic coil serves to create a magnetic field that pulls the armature in the direction of the magnetic coil and thus causes the armature to move up and down.

  Therefore, the structure including the magnetic module, the armature, and the residual air gap disk can be used as an electromagnetic actuator. In particular, the proposed structure can be used to operate the valve body with a solenoid valve.

  In a development of the invention, it is proposed that the armature is configured as a solenoid plunger. The armature is at least partly surrounded by a magnetic coil as a solenoid plunger, so that the residual air gap disk arranged between the armature and the magnetic core is located inside the magnetic coil. In a corresponding construction, the residual air gap disc is fixed both in its axial position and in its radial position.

  Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The drawing shows the following:

FIG. 3 is a schematic longitudinal sectional view showing a structure including a magnetic module, an armature and a residual air gap disk according to the present invention when a magnetic coil is not energized. FIG. 2 is a schematic longitudinal sectional view showing the structure of FIG. 1 when a magnetic coil is energized. 1 is a perspective view showing a residual air gap disk according to the present invention according to a preferred embodiment of the present invention. FIG. 1 is a perspective view showing a residual air gap disk according to the present invention according to a preferred embodiment of the present invention. FIG. 1 is a perspective view showing a residual air gap disk according to the present invention according to a preferred embodiment of the present invention. FIG.

  The structure of the invention shown in FIGS. 1 and 2 comprises a magnetic module 2 comprising an annular magnetic coil 8 which at least partly surrounds the magnetic core 3 of the magnetic module 2, and a magnetic coil configured in this example as a solenoid plunger. 8 and an armature 4 capable of moving up and down in cooperation with each other. Therefore, the end portion of the armature 4 facing the magnetic core 3 is surrounded by the annular magnetic coil 8. Between the magnetic core 3 and the armature 4, a residual air gap disk 1 is arranged that serves as a separate return spring. This is because the residual air gap disk 1 itself is configured as a spring member in the form of a disc spring.

  In the example of FIGS. 1 and 2, the residual air gap disk has a spherical shape and is supported by the end face of the armature 4 via an annular outer circumferential area, and the upper area disposed in the center. Is supported by the end face of the magnetic core 3 via When the magnetic coil 8 is energized, the armature 4 is attracted toward the magnetic coil 8 or the magnetic core 3 by the magnetic field formed at that time. At this time, the axial interval between the armature 4 and the magnetic core 3 is narrowed, whereby the residual air gap disk 1 is subjected to bending stress. The annular magnetic coil 8 surrounding the magnetic core 3, the armature 4 and the residual air gap disk 1 prevents a deviation in the radial direction.

  Possible specific embodiments of the residual air gap disk 1 according to the invention can be seen in FIGS. Common to all the three embodiments is that each of the basic shapes is cup-shaped, and a disc-shaped first area 10 disposed in the center and an annular second area 11 surrounding the first area 10 are provided. The first and second sections 10, 11 are spaced axially from each other. End faces located on the outer sides of both sections 10 and 11 form mounting surfaces 5 and 6 for mounting or supporting the magnetic core 3 and the armature 4.

  In the example of FIG. 3, the axial spacing between the first and second sections 10, 11 is bridged by a tapered wall 12 so that a fully closed residual air gap disk is obtained. 1 is formed.

  In the example of FIG. 4, the axial spacing is bridged by the two webs 7 that are diametrically opposed to the disc-shaped first zone 10. Between both webs 7 there remains an opening which serves as a through-flow opening 9. The web 7 has an inclined shape corresponding to the wall portion 12 formed in a tapered shape.

  In the example of FIG. 5, the axial spacing between the sections 10, 11 is bridged by a single web 7. The web 7 thus forms, together with the disc-shaped area 5, a spring arm that allows a special bending-elastic construction of the residual air gap disk 1.

DESCRIPTION OF SYMBOLS 1 Residual air gap disk 2 Magnetic module 3 Magnetic core 4 Armature 5 Mounting surface 6 Mounting surface 7 Web 8 Magnetic coil

Claims (8)

In the residual air gap disk (1) for the magnetic module (2) for adjusting the residual air gap between the magnetic core (3) of the magnetic module (2) and the armature (4) capable of moving up and down,
The residual air gap disc (1) is configured as a spring member, Ri available Der to return the elevator movable the armature (4), the outer peripheral surface of the residual air gap disc (1) , the residual air gap disc characterized that you have the inner peripheral surface contact of the magnetic coil provided in the magnetic module (2) (8).   The residual air gap disk (1) according to claim 1, characterized in that the residual air gap disk (1) is configured in the form of a disc spring.   The residual air gap disk (1) is made of a non-magnetizable material for magnetically separating between the magnetic core (3) and the armature (4). Or a residual air gap disc (1) according to 2; The residual air gap disk (1) has a first placement surface (5) for placing in contact with the magnetic core (3), and a second place for placing in contact with the armature (4). has a placement surface (6), both of the mounting surface (5, 6) are spaced axial spacing from each other, through one of the webs (7) even without least Residual air gap disk (1) according to any one of claims 1 to 3, characterized in that it is configured in areas (10, 11) connected to each other.   Residual air gap disk (1) according to claim 4, characterized in that at least one mounting surface (5, 6) is configured in a disc-like or annular shape.   A magnetic module (2) having an armature (4) and a residual air gap disk (1) according to any one of claims 1 to 5, wherein the residual air gap disk (1) is the magnetic core. A magnetic module disposed between (3) and the armature (4).   The magnetic module (2) according to claim 6, characterized in that the magnetic module (2) further comprises an annular magnetic coil (8) surrounding the residual air gap disk (1).   Magnetic module (2) according to claim 6 or 7, characterized in that the armature (4) is configured as a solenoid plunger.

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