DE2147221B1

DE2147221B1 - Ring-shaped socket for circular diaphragms

Info

Publication number: DE2147221B1
Application number: DE2147221A
Authority: DE
Inventors: Martin 7500 Karlsruhe Klobe
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 1971-09-22
Filing date: 1971-09-22
Publication date: 1972-12-28
Also published as: JPS5241420B2; JPS4841152A

Description

In F i g. 2 ist eine technische Ausführung der Fassung 2 dargestellt. Sie besteht im wesentlichen aus einem zylindrischen Ring 6, dessen Außendurchmesser etwa dem Membrandurchmesser entspricht. Um den für eine Schweißverbindung mit der Membran notwcndigcn schmalen Rand7 zu erhalten, ist der zylindrische Ring 6 bis zu einem Teil ci sciner Höhe konisch ausgedreht. In der Nähe des Randes 7 ist in der Mantel fläche des zylindrischen Rings 6 eine Ringnut 8 mit keilförmigem Querschnitt angebracht, deren Tiefe so bemessen ist, daß ihre eine Fianke einer seits und die zur Ausbildung des Randes 7 vorgenommene konische Ausdrehung andererseits einen, einen Teil des zylindrischen Rings 6 bildenden kcgelstumpftörmigen Ring 3' bilden. In Fig. 2 shows a technical version of the version 2. It consists essentially of a cylindrical ring 6, the outer diameter of which corresponds approximately to the diaphragm diameter. In order to ensure a welded connection with the membrane To obtain the necessary narrow edge7 is the cylindrical one Ring 6 turned out conically up to a part of its height. Near the edge 7 is in the jacket surface of the cylindrical ring 6 is an annular groove 8 with a wedge-shaped Cross-section attached, the depth of which is so dimensioned that your one Fianke one on the one hand and the conical recess made to form the edge 7 on the other hand a frustoconical ring 3 'forming part of the cylindrical ring 6 form.

Diese Ausführungsform ist als Drehteil einfach herzustellen. Der breite obere Rand 9 des zylindrischen Rings 6 eignet sich sehr gut zum Einleiten des zur Spannung der hier nicht gezeichneten Membran benötigten Drucks. Üblicherweise wird dieser bereits in F i g. 1 gezeigte Druck P gleichmäßig auf den Rand verteilt wirken. Es kann jedoch auch vorgesehen werden, daß verschiedene Drücke punktförmig auf den Rand verteilt einwirken, um unregelmäßige Spannungen in der Membran zu eliminieren. This embodiment is easy to manufacture as a turned part. Of the wide upper edge 9 of the cylindrical ring 6 is very suitable for introduction the pressure required to tension the membrane (not shown here). Usually this is already shown in FIG. 1 pressure P shown evenly distributed over the edge works. However, it can also be provided that various pressures are punctiform act distributed on the edge in order to eliminate irregular stresses in the membrane.

In F i g. 3 ist ein weiteres als besonders vorteilhaft angesehenes Ausführungsbeispiel gezeigt, in welchem die Fassung 2 für die Membran 1 aus zwei spiegelbildlich zueinander angeordneten zylindrischen Ringen 6 gemäß Fig.2 besteht. Vorteilhaft ist, daß die empfindliche Membran 1 zwischen den beiden Ringen 6 relativ geschützt angeordnet ist und die Spannwirkung durch die Möglichkeit, auf beide äußere Randflächen der Ringe 6 Druck P auszuüben, vergrößert wird. In Fig. 3 is another that is considered particularly advantageous Embodiment shown in which the socket 2 for the membrane 1 from two Cylindrical rings 6 arranged in mirror image to one another as shown in FIG. It is advantageous that the sensitive membrane 1 between the two rings 6 is relatively Is arranged protected and the clamping effect by the possibility of both external Edge surfaces of the rings 6 to exert pressure P is enlarged.

Wie bereits bei Fig. 1 erwähnt, kann auch die Möglichkeit bestehen, zur Straffung der Membran Zugkräfte anwenden zu müssen. Für dicscn Fall ist eine in der F i g. 4 dargestellte Ausführungsform der ringflrmigen Fassung 2 vorgesehen, die wickler aus einem zylindrischen Ring 6 besteht, dessen Außcndurchmesser erheblich größer ist als der der hier nicht gezeichneten Membran und welcher zur Erziclung eines schmalen Befestigungsrandes 7 für die Membran und zur gleichzeitigen kegclstumpfförmigen Ausbildung eines Teiles des Ringes 6 in seinem unteren Teil trichterförmig ausgeführt ist. Die untere Randfläche 10 des Rings 6 ist dabei so abgeschrägt, daß sie mit der inneren Abschrägung 11 dem trichterförmigen Teil des zylindrischen Rings 6 eine kegelstumpfähnliche Ringform 3' verleiht, um die bereits mehrfach beschriebene Wirkung zu erzielen, wenn auf dem schmalen Befestigungsrand 7 Zugkräfte P' einwirken. As already mentioned in Fig. 1, there can also be the possibility of to tighten the membrane Having to apply tensile forces. In this case there is one in FIG. 4 shown embodiment of the ring-shaped socket 2 is provided, the winder consists of a cylindrical ring 6, the outer diameter of which is considerable is larger than that of the membrane, not shown here, and which is used for development a narrow fastening edge 7 for the membrane and at the same time frustoconical Formation of part of the ring 6 in its lower part is funnel-shaped is. The lower edge surface 10 of the ring 6 is beveled so that it is with the inner bevel 11 the funnel-shaped part of the cylindrical ring 6 a Truncated cone-like ring shape 3 'gives the effect already described several times to be achieved when 7 tensile forces P 'act on the narrow fastening edge.

Diese Ausführungsform eignet sich besonders für die spiegelbildliche Anordnung, ähnlich wie bei Fig.3, wobei die notwendige Zugkraft z.B. durch Einbringen eines Preßkeils in den keilförmigen Spalt zwischen den beiden Ringen 6 relativ einfach zu erzeugen ist. This embodiment is particularly suitable for the mirror image Arrangement, similar to Fig. 3, with the necessary tensile force e.g. by introducing a press wedge in the wedge-shaped gap between the two rings 6 relatively easy is to be generated.

Das Zusammendrücken der Fassung kann durch Anschläge begrenzt werden und im Falle der elastischen Verformung der Randfläche kann die erreichte optimale Stellung durch Vorrichtungen gesichert werden. The compression of the socket can be limited by stops and in the case of the elastic deformation of the edge surface, the optimum Position to be secured by devices.

Da bei der Fassung von metallischen Plattenfedern ähnliche Probleme auftreten, gelten die oben dargestellten Maßnahmen in gleicher Weise für Plattenfedern. Since there are similar problems with the setting of metallic diaphragm springs occur, the measures outlined above apply in the same way to diaphragm springs.

Claims

Claims: 1. Annular socket for circular and approximate flat metallic diaphragms with a first edge surface that coincides with the edge of the diaphragm is connected, characterized in that the socket (2) is designed in such a way is that when an axial pressure (P) is exerted on that of the first opposite second edge surface an elastic or plastic deformation of the first edge surface supported in the axial direction and connected to the membrane (1) occurs in the direction of an increase in its diameter.

2. Annular socket according to claim 1, characterized in that the socket (2) is designed as a frustoconical ring (3) in the manner of a disc spring and that the membrane (1) is connected to the edge (5 ') of larger diameter.

3. Annular socket according to claim 1, characterized in that the socket (2) consists of a cylindrical ring (6), the outer diameter of which corresponds approximately to the diaphragm diameter and to the formation of a narrow, with the edge (7) to be connected to the membrane is conical up to a part (d) of its height is turned out and in the vicinity of the edge (7) in the outer surface of the ring (6) an annular groove (8) wedge-shaped cross-section is attached.

4. Annular socket according to claim 1, characterized in that the socket (2) consists wholly or partially of a frustoconical ring (3, 3 ') and that the membrane (1) is connected to its edge (5) of smaller diameter and that a tensile force is exerted on this edge (5).

5. Annular socket according to claims I to 4, characterized in that that they consist of two mirror-inverted and coaxially arranged sockets (2) exists, between which the membrane (1) is arranged.

The invention relates to an annular socket for circular and approximately flat metallic membranes with a first edge surface that is connected to the Edge of the membrane is connected.

Conventionally, appropriately shaped membranes are used to hold membranes Socket parts used, for example metal rings, as a first approximation are to be regarded as rigid (see British patent specification 793 707).

If a metallic membrane is supplied with heat, for example by Welding or soldering, connected to the edge of their annular socket part, so can the previously smooth membrane due to different thermal expansion when connecting become wavy or there are tensions in the membrane that create a uniform Prevent the membrane from responding over its entire surface. When using Metal bonding techniques, albeit to a lesser extent, also run the risk of that the membrane is tensioned unevenly.

These disadvantages are particularly important in the case of diaphragms for measuring purposes, which are used in pressure or differential pressure measuring devices, interfering.

There is accordingly the task of creating a version of the above-mentioned Kind of creating that allows in a simple manner after connecting the membrane with their mount, which can be done by soldering, welding or gluing, to the membrane tension act in the sense of a smoothing or alignment of the membrane.

This object is achieved in that the socket is designed in this way is that when a pressure acting in the axial direction is exerted on that of the first opposite second edge surface an elastic or plastic deformation of the in the axial direction supported and connected to the membrane first edge surface in Direction of an increase in their diameter occurs.

The material and shape of the membrane and the frame are chosen in this way or coordinated in such a way that the membrane supports the movement of the associated with it Edge of the frame is stamped. So you have it in your hand, the membrane after the connection with the frame, if necessary, to tighten or loosen.

To explain the invention, FIGS. 1 to 4 different Exemplary embodiments shown and described below.

Fig. 1 shows the principle of action in a schematic representation. A circular disc-shaped metal diaphragm 1 is welded along its edge connected to an edge surface of an annular socket 2. The ring-shaped socket 2 here consists of a frustoconical ring 3 in the manner of a disc spring, with its lower edge surface 5 'of larger diameter, as can be seen from the figure is, the membrane 1 is welded.

In order to smooth the membrane 1, which has become wavy during welding, and if necessary, moreover, a certain preload is applied to the edge surface 5 smaller diameter of the frustoconical ring 3 exerted a pressure P. the Edge surface 5 'of larger diameter of the frustoconical ring 3 with the membrane is supported at least partially against a fixed abutment 4. this causes a reduction in the height h of the frustoconical ring 3 with simultaneous Extension of its larger edge diameter. The membrane is thus stretched. This condition can be achieved by suitable devices for maintaining the pressure P, such as B. clamping screws are held. If the circumstances so require, the principle of action can also be reversed so that the membrane 1 on the Edge surface 5 of smaller diameter of the frustoconical ring 3 is attached. To tighten the membrane 1, a tensile force must then be applied accordingly to the edge surface 5 be exercised.

Should it be necessary to attach the membrane to its To loosen socket 2, so is on the ring 3 in the latter arrangement to exert its height h reducing pressure.