Sealing device for a radial swivel motor

US7441493B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Stefan Beetz · Barnin, DE
• Klaus Reichei · Bogen, DE
• Torsten Baustian · Crivitz, DE

Key dates

• Filing date: Mar 1, 2005
• Grant date: Oct 28, 2008
• Expiry date: Nov 29, 2025

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B15/12
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

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.