JPH0432226U

JPH0432226U -

Info

Publication number: JPH0432226U
Application number: JP7379590U
Authority: JP
Priority date: 1990-07-10
Filing date: 1990-07-10
Publication date: 1992-03-16
Anticipated expiration: 2004-10-12
Also published as: JPH0639067Y2

Description

[Brief explanation of the drawing]

第１図はこの考案に係るガスタービンの概略縦
断面図、第２図は軸受部潤滑構造を示す要部の拡
大縦断面図、第３図は第２図−線に沿う断面
図、第４図は第２図−線に沿う断面図、第５
図は第２図−線に沿う断面図、第６図は従来
のガスタービンにおけるジエツト給油方式の軸受
部潤滑構造を示す要部の縦断面図、第７図は従来
の他のガスタービンの軸受部潤滑構造を示す要部
の縦断面図である。１……遠心圧縮機、２……半径流タービン、３
……回転軸、４……ボス部、９……燃焼器、１２
……タービンノズル、１６……筒型軸受ハウジン
グ、１８……第１の軸受、１９……第２の軸受、
２０……潤滑油供給通路、２１Ａ，２１Ｂ……給
油孔、２２……軸方向溝、２６……排油ポンプ。 Fig. 1 is a schematic vertical sectional view of a gas turbine according to this invention, Fig. 2 is an enlarged longitudinal sectional view of the main part showing the bearing lubricating structure, Fig. 3 is a sectional view taken along the line of Fig. 2, and Fig. 4 The figure is a sectional view taken along the line of Fig. 2 and Fig. 5.
The figure is a sectional view taken along the line of Fig. 2, Fig. 6 is a longitudinal sectional view of the main parts showing the jet oiling bearing lubrication structure of a conventional gas turbine, and Fig. 7 is a bearing of another conventional gas turbine. FIG. 2 is a vertical cross-sectional view of a main part showing a partial lubrication structure. 1...Centrifugal compressor, 2...Radial flow turbine, 3
...Rotating shaft, 4...Boss part, 9...Combustor, 12
... Turbine nozzle, 16 ... Cylindrical bearing housing, 18 ... First bearing, 19 ... Second bearing,
20... Lubricating oil supply passage, 21A, 21B... Oil supply hole, 22... Axial groove, 26... Oil drain pump.

Claims

[Scope of utility model registration request]

A centrifugal compressor and a radial turbine are arranged back to back and integrally rotated, and a boss part of the centrifugal compressor is fitted onto the rotating shaft of the radial turbine, and a cylindrical bearing having a diameter smaller than the diameter of the boss part is provided. In a gas turbine in which first and second bearings are interposed between a housing and the rotating shaft at a distance in the axial direction, lubricating oil is supplied to the center of the rotating shaft through an opening on an end face of the rotating shaft. A radial oil supply hole is provided in the rotary shaft to form a passage and to supply oil by centrifugal force from the lubricating oil supply passage on both axial sides of the second bearing on the centrifugal compressor side, and the second bearing is connected to the centrifugal compressor. An axial groove is formed in the inner circumferential surface of the supporting cylindrical bearing housing to communicate the axially opposite sides of the second bearing, and oil is supplied to both sides of the second bearing from the oil supply hole. A bearing lubricating part structure for a gas turbine, characterized in that an axial flow type drain oil pump is attached to the rotating shaft to forcefully feed and discharge lubricating oil to a first bearing side.