公开(公告)号：JPH07279615A

公开(公告)日：1995-10-27

申请号：JP8580795

申请日：1995-04-11

Applicant: ABB MANAGEMENT AG

Inventor： KAMIRU MATEISUKAKU

IPC: F01D25/16 ,  F01D9/06 ,  F01D25/18 ,  F02C7/00 ,  F02C7/06 ,  F16N21/00

Abstract: PURPOSE: To shorten an oil discharge passage by guiding an oil discharge pipe of a turbo machine from a bearing casing to the outside through an exhaust diffuser, directly connecting an oil discharge conduit to a lower part of the bearing casing oil tightly and freely to operate, and leading out the oil discharge conduit through a hollow and vertical flow rib. CONSTITUTION: A rotor 1 and an impeller carrier 2 suspended inside a turbine casing 3 are disposed on an exhaust side final stage of an axial flow gas turbine. An exhaust casing 4 has annular inside part 5 and an outside part 6, and restricts an exhaust diffuser 7. Oil flows out from a bearing 9 through an oil groove, achieves an oil discharge conduit 12, and is guided to an oil tank of the outside. The oil discharge conduit 12 is connected to a spring stay 15, and formed as a spring support of a bearing casing 10. The oil discharge passage is not guided through the exhaust diffuser 7 in an axial direction, and is formed as a short oil discharge passage. The exhaust diffuser structure is lightened.