DE2361261A1 - Roll diaphragm for pressure accumulators - has hemispherical shape with ring-shaped reinforcement at edges - Google Patents

Abstract

The roll diaphragm consists of rubber or synthetic material. The diaphragm is hemispherical when it is not under stress and has at least one ring-shaped reinforcement, positioned in a plane at right angles to its central axis. The diaphragm has an even wall thickness between an external tension roll, an internal fastening roll, and the reinforcement, formed by a single-roll or multi-roll section. The reinforcement has a web for fastening a synthetic ring with a wire insert. The diaphragm is held by its edges in the accumulator vessel, and as the trapped gas is compressed, the central portion of the diaphragm is pushed in until the whole of the diaphragm is pushed inside out.

Description

Daimler-Benz Aktiengesellschaft Daim 9770/4

Stuttgart-Untertürkheim 5 December 1973

Rolling diaphragm

The invention relates to a rolling diaphragm made of rubber or plastic, in particular for pressure accumulators.

As is well known, pressure accumulators must work reliably and functionally in every installation position, especially in relation to a horizontal position of the storage axis, if an uneven loading and associated uneven loading Unwinding of the pressurized membrane occurs.

The latter has the consequence that gaps, kinks or bags are formed in the bellows of the rolling membrane, through which they appear Occurring vibrations around a static middle layer of the membrane material is milled until the material structure damaged and therefore porous.

The invention is based on the object of providing an effective one with structurally and technically simple means To create execution of a rolling membrane, which prevents this disadvantage and an even unrolling and rolling up of the membrane in every installation position of the accumulator, including uneven pressure medium admission guaranteed.

This is done according to the invention in that the rolling diaphragm is hemispherical and has at least one is provided in a plane perpendicular to its central axis extending annular stiffener.

50982A / 0165

- 2 - Palm 977OA

In order to ensure that the membrane rolls up and down evenly, the roll membrane has an outer one Einspannwulst, an inner fastening bead and the annular stiffener a uniform wall thickness.

In one embodiment of the invention, the one is annular Reinforcement designed as a single ring bead.

In another embodiment of the invention, the annular stiffener designed as a multiple ring bead.

Another feature of the invention is the fact that the single or multiple ring bead made of rubber or plastic exists and is provided with one or more webs.

In a further embodiment of the invention, the web for the attachment of at least one plastic ring with a wire insert is designed as an additional reinforcement and thus for better guidance of the rolling diaphragm.

In a further embodiment, the plastic ring is with Wire insert formed in a developed form.

Finally, an embodiment according to the invention consists in that the plastic ring with wire inlay in one of the web comprehensive form is formed.

These described designs ensure an operationally and functionally reliable unrolling and rolling up of the rolling membrane in every installation position of the pressure accumulator.

In the drawing, the invention is shown in one embodiment. for example shown.

- 3 509824/0165

- 3 - Daim 9770A

Ee show '*.

Fig. 1 - a «pressure accumulator in section with built-in Rolling diaphragm, and the

2 and 3 details of the stiffening of the rolling membrane in section on an enlarged scale.

1 shows a pressure accumulator, which consists of a rotationally symmetrical housing 1 and is divided into a fluid space 3 and a gas space k by a roll bar 2, which serves as a movable partition.

When installed, the rolling diaphragm 2 is as Einspann-ΐ / ulet 5 held by a ring 6 and on Befeatigungswulst 7 connected to a sheet metal disk 8. ■

The rolling membrane 2 is produced in a hemispherical shape 9 in a dash-dotted line * everted shape and with a ring-shaped stiffener, which is called Sinzelringmtlat 10 or as a multiple ring bulge 11 is formed.

Layer 12, shown in dashed lines, results from the even and safe rolling of membrane 2 and corresponds to a specific operating state in the pressure accumulator.

Fig. 2 shows the rolling diaphragm 2 with a single ring bead 10, which is provided with a web 13. This annular ridge is bevelled for gluing a plastic ring 1U with a wire insert 15.

Flg. 3 shows the rolling diaphragm 2 with a multiple ring bead 11, the one with two bars 16 and 1? is provided. The two plastic rings 18 with wire insert 19 are provided with annular grooves and thus attached in a form comprising the two webs 16, 17 by gluing.

5 0 9824/016 5 _k

Claims (8)

ir -. Daim 977OA "December 5, 1973 Expectations (I / Aua rubber or plastic existing rolling diaphragm, in particular for pressure accumulators, which is preferably installed upside down compared to its production state _f characterized in that the rolling diaphragm (2) is hemispherical and with at least one plane extending perpendicular to its central axis annular stiffener (10, 11) is provided. 2. Rolling membrane according to claim 1, characterized in that that between an outer clamping bead (5) · an inner fastening bead (7) and the annular reinforcement (10, 11) a uniform Has wall thickness. 3 * rolling membrane according to claim 1, characterized in that that the ring-shaped stiffening as a single ring bead, (10) is trained. * k. Rolling diaphragm according to claim 1, characterized in that the ring-shaped stiffening is designed as a multiple ring bead (11). 5. Rolling membrane according to claims 1 to k, characterized in that the single or multiple ring bead is made of rubber or plastic and is provided with one or more webs (13, 16 »17). 509824/0165 Daim 977OA 6. Rolling membrane according to Claims 1 and 5, characterized in that the web (13, 16, 17) for fastening, at least one plastic ring (i4, 18) with wire insert (15> 19) designed accordingly is. 7 * rolling membrane according to claims 1, 5 and 6, thereby characterized in that the plastic ring (1 ^, 18) with Wire insert (15, 19) is formed in an angled shape. 8. rolling diaphragm according to claims 1, 5 and 6, characterized marked that the plastic ring (1 * +, 18) with Wire insert (15 »19) is formed in a form surrounding the web (16, 17). 509824 / Ü165 Blank page