Apparatus for installing guide tubes for instrumentation signal bearing

Abstract

Segmented guide tubes for the signal-bearing wires for journal and thrust bearing instrumentation are received in the lower bearing housing section without removal of the rotor or major tear-down of the turbine. Guide tube segments for the thrust bearings are specifically shaped and configured to enable remote or blind threaded connection within the lower housing section with fittings facilitating the 'feel' for the alignment necessary to thread a first straight tube segment from above the lower housing section into the fitting of a second guide segment introduced into the drain hole of the lower housing section. Once threaded together, signal-bearing wires may be snaked through the resultant guide tube assembly. Guide tubes for the journal bearing include side guide tube segments secured at their upper ends to the lower housing section and to a Y-tube connection at their lower ends. A pair of guide tubes are assembled with one guide tube end being coupled to the Y-tube fitting and carrying a self-locking leaf spring support for securing the aft end of one guide tube end in a reduced cavity in the lower housing section by remote means. The latter pair of guide tube segments are clamped to a drain pipe in the drain opening with the second segment passing through a penetration opening in the bearing housing.