Seal bearing assembly with annular cylinder of two outer cylindrical bearings and at least two braided packing members therebetween with all having equal inner and outer radii to fill the seal cavity of a mechanical device

摘要

A seal-bearing assembly to be inserted into the seal cavity of a mechanical device to provide a seal and a bearing surface to eliminate whip in a rotating, reciprocal, or rotating and reciprocal cylindrical member. The seal-bearing assembly is particularly well suited for use in a reciprocal pump or a piston-driven valve, or between the steam lance and fixed steam tube in a sootblower. The assembly includes at least a pair of outer substantially rigid cylindrical bearings having an inner bore to be positioned over the cylindrical member and at least one complimentary flexible textile packing ring substantially comprised of carbon disposed between the two outer bearing members. In assemblies including an additional bearing, the additional bearing is surrounded by at least one flexible packing on each side. The inner bore of the bearing members provides a bearing surface for eliminating whip of the moving elements in the device.

主权项

1. A seal-bearing assembly for a mechanical device having a shaft with reciprocating and/or rotational movement, comprising:
a first substantially rigid high performance polymeric cylindrical outer bearing; a second substantially rigid high performance polymeric cylindrical outer bearing spaced apart from and axially aligned with the first outer bearing; and at least two cylindrical textile packing members, each cylindrical textile packing member including carbon yarn and each being positioned adjacent to one of the first and second outer bearings, wherein the first and second outer bearings are closely dimensioned to fit into the seal cavity of a device with an inner bore closely dimensioned to fit over the shaft and within the inner bore of the cavity of the device to provide a bearing surface for the shaft, and wherein the cylindrical textile packing members each have an inner radius and an outer radius that are approximately equal to the inner and outer radii of the bearings to fill the seal cavity of a mechanical device.