DE7208768U - Rotary feed-through device for liquid media - Google Patents

Description

GEORG HANSMANN VDI PATENT ENGINEER

BANK ACCOUNTS: VOLKSBANK HAMBURG NORD, ACCOUNT NO. 199840 VEREINSBANK HAMBURG, ACCOUNT NO. 11/14230 POSTSCHECKt HAMBURG 176 65

2 HAMBURG 50 (Altona), JULIUS-LEBER-STR. 21 -TEL 38 24 57

G. 5426

Applicant; Company BUCHHOLZ HYDRAULIK HELMUT BUCHHOLZ, 2301 Klausdorf / Schwentine, Wasserwerksweg

Rotary feedthrough for liquid media.

The innovation relates to a rotary feedthrough for liquid media, in particular hydraulic oils, between one another movable rotating bodies with axial, radial and annular channels.

Such hydraulic rotary feedthroughs for forwarding hydraulic oils to a stationary body Radially movable upper part is used primarily in vehicles, such as cranes, from the undercarriage to the upper frame a freely movable liquid supply can take place.

Depending on the number of consumers to be connected who are in In the form of cylinders or oil motors in the upper frame are controlled via control units and pumps in the undercarriage are stored, appropriate oil channels must be created in a rotary union. The order of magnitude of a Rotary feedthrough is determined in the traditional sense from the number of media-carrying holes in the fixed Part attached to the axle and via ring

channels in the outer part, which are separated from one another by means of seals, are removed to the outside. These Rotary feedthroughs are built by lining up the ring channels and given the required dimensions and very long because of their necessary number.

The innovation is intended to avoid relatively large structural dimensions and create a large number of discharge channels will.

This object is achieved in that a fixed cylindrical base body is guided by a rotatable one Outer cylinder is encased and a rotatably guided inner sleeve is arranged in its interior, and the The base body has axial bores of different bore depths, which are either intended for the outer cylinder Ring channels or are connected to ring channels intended for the inner socket, and the ring channels on the outside have radial connections and the inner ring channels have axial connections.

Thus not only channels are derived from being, but also into the interior of the fixed base body, so that several components can be nested one inside the other given is.

A division can be made according to the new subject matter that bulk consumers are addressed via an outer body, while the inner rotating body Auxiliary consumers or consumers of smaller demand can be controlled.

This makes it possible to achieve a compact design * which is operationally and economically superior to a rotary feedthrough in the conventional sense, moreover due to the short construction leicMBr is mastered.

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7208788 ία 8.72

In the drawing, the subject of the innovation is in one embodiment shown in a longitudinal section.

A fixed cylindrical base body 1 is provided on a diameter circle with axially extending bores 9, which have a different depth and those with external connections 16 are connected in a rotatable outer cylinder 2. The connection is made via ring channels 15, one behind the other are arranged and separated from one another by ring seals 7.

The bores 9 are also connected to annular channels 14 of a rotatable inner bush 3. The ring channels 14 »ind one behind the other arranged and separated from one another by ring seals 8. The annular channels 14 have axial bores 12 in the Inner socket 3 connection. The bores 12 lead via channels 18 to end connections 17.

The axial bores 9 are, if necessary, via transverse bores 13 connected to the ring channels 14 and 15, respectively. Cross bores 13 can also be blocked off by sealing plugs 19 will. The annular channels 14 and 15 can be mounted in the cylindrical Grui.dkörper 1 or in the rotatable parts be.

The outer cylinder 2 and the inner sleeve 3 are via Kugelbzw. Plain bearings 5 and 6 out of pressure relief. The outer cylinder 2 has a guide flange 4. The rotatable control parts 2 and 3 in the Frame of the respective component attached.

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Claims (7)

Protection claims 1. Rotary feedthrough for liquid media, especially hydraulic oils, between mutually movable rotating bodies with axial, radial and annular channels, characterized in that a fixed cylindrical The base body (1) is encased by a rotatably guided outer cylinder (2) and inside a rotatably guided one Inner bushing (3) is arranged, and the base body (1) has axial bores (9) of different bore depths, either with ring channels (15) intended for the outer cylinder (2) or with ring channels (15) intended for the inner sleeve (3) Ring channels (14) are connected, and the outer ring channels (15) have radial connections (16) and the inner ring channels (14) have axial connections (12). 2. Rotary feedthrough according to claim 1 *, characterized in that that the ring channels (14 and 15) are arranged in the cylindrical base body (1). 3. Rotary feedthrough according to claim 1, d _t , characterized in that the annular channels (14 and 15) are arranged in the rotatable parts. 4. Rotary feedthrough according to claim 1 to 3> characterized in that that the radial connections (16) for connection for main consumers and the axial connections (17) for Auxiliary lines are provided. 5. Rotary feedthrough according to claim 1 to 4, characterized in that that the ring channels (14 and 15) are separated from one another by ring seals (7 or 8). -5- 6. Rotary feedthrough according to claim 1 to 5, characterized in that that the axial bores (9) are connected to the annular grooves (14, 15) via transverse bores (13) Only the cross bores (13) are located through the plugs (19) are lockable. 7. Rotary feedthrough according to claim 1 to 6, characterized in that that the outer cylinder (2) and the inner bushing (3) with respect to the base body (1) by means of spherical or Plain bearings (5 or 6) are guided.