Patent DE-102011005945-A1 (DE)
Title: Filter device, useful for removing liquid and/or solid impurities from gas flow, comprises filter element, and housing, in which filter element is rotatably mounted by bearing around rotational axis, where bearing includes first ring
Inventor: PRACHER MARKUS
IPC: B01D46/26
Filed: 2011-03-23
Abstract: The filter device comprises a filter element (2), and a housing (3), in which the filter element is rotatably mounted by a bearing (5) around a rotational axis (4), where the bearing includes: a first ring (13), which is coaxially arranged to the rotational axis and comprises a first axial plain bearing sealing surface; and a second ring, which is coaxially arranged to the rotational axis and comprises a second axial plain bearing sealing surface. The second axial plain bearing sealing surface axially adjoins at the first axial plain bearing sealing surface. The filter device comprises a filter element (2), and a housing (3), in which the filter element is rotatably mounted by a bearing (5) around a rotational axis (4), where the bearing includes: a first ring (13), which is coaxially arranged to the rotational axis and comprises a first axial plain bearing sealing surface; and a second ring, which is coaxially arranged to the rotational axis and comprises a second axial plain bearing sealing surface. The second axial plain bearing sealing surface axially adjoins at the first axial plain bearing sealing surface. The ring is rotatably arranged relative to the filter element, and the other ring is rotatably arranged relative to the housing. The second ring is axially, movably arranged relative to the housing, and is prestressed by a spring force axially against the first ring. The spring force is generated by a spring element, which is supported on the second ring at a side facing away from the first ring. The second ring is axially, movably arranged relative to the filter element and by a fuse element, which axially protrudes into a locking recess against rotation relative to the housing or relative to the filter element. The second ring carries at the side of an axial plain bearing ring facing the first ring, and is formed on the second axial plain bearing sealing surface. The housing carries a radial seal, which radially adjoins at the second ring on an outer side of the housing. The second ring is directly received to the housing, and/or the rotation of the second ring is carried at the housing. The second axial plain bearing sealing surface is directly formed at the second ring. The bearing has a third ring, which is coaxially, rotatably arranged to the rotational axis relative to the filter element. The third ring carries a first radial seal that externally adjoins at the second ring, and/or carries a second radial seal that radially adjoins at a rotor carrying the filter element at an outside of the third ring. The second ring is supported over the spring force at the third ring, the respective spring element is supported at the third ring, and/or the rotation of the second ring is performed on the third ring. The first ring carries the radial seal that radially adjoins against the housing in an inner side of the first ring. The first ring is axially inserted into the housing, the first ring or the second ring is rotatably arranged at the rotor carrying the filter element, and/or a receiving space of the housing is axially closed with a ring cover, in which the rings are housed. The ring cover is coaxially arranged to the rotational axis on the side of the first ring facing away from the second ring, and is mounted to the housing.