US 7,441,493 B2 · Sealing device for a radial swivel motor

Abstract

Swivel motors have a large number of tightness problems on the inside, in particular in a broad operating temperature range. Therefore, to improve the tightness over a temperature range of −40° C. to +130° C., a sealing device (20) is provided with an inner soft sealing element (20) and a plurality of outer rigid sealing elements (21, 22, 23, 24). The soft sealing element (20) and the rigid sealing elements (21, 22, 23, 24) are undetachably connected to one another. The circumferential sealing surfaces of the rigid sealing elements (21, 22, 23, 24), in the unloaded state, close flush with the sealing surface of the soft sealing element (20). The rigid sealing elements (21, 22, 23, 24) are spaced apart from one another by at least one radial compensating groove (25) and at least one axis-parallel compensating groove (26). The compensating grooves (25, 26) are arranged on both sides of the sealing device, such that the compensating grooves (25, 26) on one side are not overlapped by the compensating grooves (25, 26) on the other side.

Claims15

Dependent claims

A sealing device for a radial swivel motor including a stator with at least one stator wing and a rotor with at least one rotor wing, which form at least one sealing chamber and one inlet chamber, the sealing device for sealing in the inward direction, whereby the sealing device is pressed into a mounting groove (18) of said rotor wing and of said stator wing, the sealing device comprising:

outer rigid sealing elements;
and
a pretension element made of an elastomer connecting said outer rigid sealing elements to one another, said pretension element comprising a soft sealing element and said outer rigid sealing elements providing a multipart construction, whereby said soft sealing element and said rigid sealing elements are connected undetachably to one another, circumferential sealing surfaces of said rigid sealing elements, in the unloaded state, end flush with the sealing surface of said soft sealing element, said rigid sealing elements are spaced apart from one another by at least one radial compensating groove and at least one said axis-parallel compensating groove, and said compensating grooves are arranged on both sides of said sealing device, such that said compensating grooves on one side are not overlapped by said compensating grooves on the other side.

Dependencies are inferred from the claim text.

Sealing device for a radial swivel motor

Life of this patent

Sealing device for a radial swivel motor

Life of this patent

Abstract

Claims15