[12] Patent
[11] Patent No.:GC0007536  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/125763
Date of the Decision to Grant the Patent:08/Apr/2018

[21] Application No.:GC 2014-26911

[22] Filing Date:27/3/2014

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventors:1- Kazutoshi YANAGIHARA،2- Haruo MIURA

[73] Owner: Hitachi Industrial Products, Ltd., 3Kanda Neribei-cho, Chiyoda-Ku, Tokyo 101-0022, Japan, Tokyo , Japan

[74] Agent: Saba & Co. T.M.P




Int. Cl.: F04D 17/12, 29/42 (2006.01)

[56] Cited Documents:

-US 3153383 A (Karol PILARCZYK) 20 October 1964
-Microfilm of the specification and drawings annexed to the request of Japanese Utility Model Application No. 35681/1979(Laid-open No. 137295/1980) (Hitachi, Ltd.), 30 September 1980
-GB 956731 A (DE LAVAL STEAM TURBINE CO.) 29 April 1964
-JP 2003269390 A (Mitsubishi Heavy Industries, Ltd.) 25 September 2003
-JP 6067797 A (Dresser Industries, Inc.) 18 April 1985
Examiner: Eng. Mohammad W. AlHoshan

[57] Abstract: A high-pressure uniaxial multistage fluid machine which eliminates the need for secondary fabrication for positioning in the axial direction with a shear key part when a shear key is used in a barrel casing. The multistage centrifugal fluid machine 200 includes a cylindrical outer casing 2 and an inner casing fitted to the outer casing to form a working gas channel between the rotor and the inner casing. The inner casing is fixed on one end of the outer casing with shear keys 21 and 22. The inner barrel 4 of the inner casing includes a first group of inner barrels and a second group of inner barrels. The first group of inner barrels and the second group of inner barrels are each fastened with a plurality of tie bolts 141 and 143 provided in the circumferential direction. Grooves made in the outer circumferences of each group of inner barrels are connected by a plurality of connecting members 122.[Selected Drawing] Fig. 1
No. of claims: 5     No. of figures: 7


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