| CPC F04D 29/4206 (2013.01) [F04D 17/122 (2013.01)] | 5 Claims |
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1. A centrifugal compressor comprising:
a rotor shaft extending in an axial direction in which a central axis extends; and
a casing including a suction port formed on a first side in the axial direction and a discharge port formed on a second side in the axial direction, wherein
the rotor shaft includes an impeller disposed inside the casing and configured to compress a working fluid supplied from the first side in the axial direction and discharge the compressed working fluid to an outer side in a radial direction with respect to the central axis,
the casing includes:
a diaphragm formed in a tubular shape extending in the axial direction so as to cover the rotor shaft;
an outer casing formed in a tubular shape extending in the axial direction so as to cover the diaphragm;
a diffuser flow path configured to guide the working fluid discharged from the impeller toward the outer side in the radial direction;
a discharge scroll configured to guide the working fluid discharged from the impeller to the discharge port; and
a flow path forming member including a scroll outer circumferential surface, the scroll outer circumferential surface being located on the outer side in the radial direction and facing an inner side in the radial direction in the discharge scroll,
the discharge scroll is connected to the diffuser flow path on the outer side in the radial direction and extending in a circumferential direction about the central axis,
the rotor shaft and the diaphragm form a bundle formed in a columnar shape extending in the axial direction, the bundle being accommodated in the outer casing in a state of being insertable and removable in the axial direction on the inner side in the radial direction,
the flow path forming member is formed to have an outside diameter smaller than an outside diameter of the bundle in the radial direction, extends in the circumferential direction, and is fixed to the diaphragm from the axial direction, and
the casing further includes an outer forming member disposed between the outer casing and the flow path forming member and fixed to the outer casing in a state of being in contact with the flow path forming member on the outer side in the radial direction.
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