Gas turbine shaft bearing system service tool and bearing system service method

摘要

A gas turbine shaft bearing system (bearing and/or seal component) service method and service tool that applies biasing force between a gas turbine shaft and a bearing system component supporting the shaft, so that the bearing system component can be removed or installed. The bearing system service tool is coupled directly to the bearing system component and the shaft, preferably without the need for external fixtures. A biasing force generator, such as a hydraulic unit applies a force on the bearing system component to cause component movement on or off the shaft. Counter-biasing forces are resisted by the fixed position turbine shaft. By exerting biasing force directly between the turbine shaft and bearing system component the service tool can be constructed of smaller, man portable components that are more easily maneuvered within relatively confined turbine service spaces, which are common in field installations.

主权项

1. A gas turbine engine bearing system service apparatus for a gas turbine having a rotor shaft and a shaft supporting bearing system, including a bearing component and a seal component that is slidably mounted on the shaft and captured within a bearing housing, comprising:
a first member adapted for coupling to a gas turbine rotor shaft; a second member adapted for coupling to a gas turbine shaft bearing system component; a biasing force generating unit coupled to the first and second members, for biasing the first and second members relative to each other so as to slide the bearing system component relative to the shaft; a hub assembly interposed between the first and second members, with the biasing force generating unit coupled thereto; and the hub assembly comprising first and second hub plates pivotally coupled to each other along a pivot axis, the first hub plate coupled to the first member and the second hub plate coupled to the second member, so as to facilitate selective rotational indexing between the first and second members.