Packing ring combination
First Claim
1. A packing ring combination with a sealing ring (12) consisting of a number of sealing segments (14) and back-up segments (13), the sealing and back-up segments (14, 13) being arranged next to one another alternately in the circumferential direction to form a ring, and with a stop ring (20) which rests axially against the sealing ring (12), wherein an axial shoulder (16) is provided on the sealing segments (14) of the sealing ring (12), which shoulder at least partially overlaps the stop ring (20) in the axial direction, and the axial shoulder (16) is arranged at a distance from the stop ring (20) in the radial direction, such that the axial shoulder (16) rests against the stop ring (20) once the sealing segments (14) have been worn by a given amount.
1 Assignment
0 Petitions
Accused Products
Abstract
Conventional combinations of radially and tangentially cut packing rings require, in particular as wear progresses, a degree of resilient deformation of the resilient packing ring, in order to be able to achieve a satisfactory sealing effect. However, the level of wear achievable is limited thereby. On the other hand, sealing rings which offer a high level of wear and a long service life due to the cut arrangement wear in an uncontrolled manner, which is associated with a risk of damage to or destruction of the sealing rings, resulting in the need for regular maintenance and replacement of the sealing rings. These problems are avoided by a packing ring combination according to the invention consisting of multi-part sealing ring 12 and stop ring 20, in that an axial shoulder 16 is provided on the sealing segments 14 of the sealing ring 12, which shoulder at least partially overlaps the stop ring 20 in the axial direction, and the axial shoulder 16 is arranged at a distance from the stop ring 20 in the radial direction, such that the axial shoulder 16 rests against the stop ring 20 once the sealing segments 14 have been worn by a given amount, whereby a wear limit or wear retardation is achieved.
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Citations
20 Claims
- 1. A packing ring combination with a sealing ring (12) consisting of a number of sealing segments (14) and back-up segments (13), the sealing and back-up segments (14, 13) being arranged next to one another alternately in the circumferential direction to form a ring, and with a stop ring (20) which rests axially against the sealing ring (12), wherein an axial shoulder (16) is provided on the sealing segments (14) of the sealing ring (12), which shoulder at least partially overlaps the stop ring (20) in the axial direction, and the axial shoulder (16) is arranged at a distance from the stop ring (20) in the radial direction, such that the axial shoulder (16) rests against the stop ring (20) once the sealing segments (14) have been worn by a given amount.
Specification