| 摘要 |
A rotary fluid machine is provided in which, among first bearings ( 23 f, 23 r) and a second bearing ( 24 ) supporting in a casing ( 11 ) opposite ends of a rotor ( 22 ) that includes an axial piston cylinder group ( 56 ) for converting the pressure energy of a working medium into mechanical energy, only the first bearings ( 23 f, 23 r) are formed from combined angular bearings that can support an axial load, and the second bearing ( 24 ) is formed from a radial bearing that can support a radial load and is axially movable relative to the rotor ( 22 ). Since the rotor ( 22 ) is axially positioned relative to the casing ( 11 ) by only the first bearings (the combined angular bearings) ( 23 f, 23 r), a difference in the amount of axial thermal expansion between the casing ( 11 ) and the rotor ( 22 ) can be absorbed by the second bearing (radial bearing) ( 24 ) without any problem. This can solve effectively problems caused by a difference in the amount of thermal expansion between the casing and the rotor of the rotary fluid machine.
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