Compressor with curved passage

A compressor comprising:

• an impeller housing accommodating a first impeller configured to compress a fluid and a second impeller configured to further compress the fluid;
• and
• an interstage component coupled to the impeller housing,
• wherein the interstage component and the impeller housing form an interstage passage that is configured to direct the fluid from the first impeller to the second impeller in a flow direction,
• wherein the interstage passage includes a curved passage configured to change the flow direction between a first direction and a second direction,
• wherein the curved passage has a first end that is oriented to direct the fluid in the first direction and a second end that is oriented to direct the fluid in the second direction,
• wherein in a cross-section of the interstage passage taken in a plane that extends along the flow direction, the curved passage is formed between an inner wall surface and an outer wall surface of the interstage passage,
• wherein an inner component selected from the impeller housing and the interstage component, forms the inner wall surface along an entire length of the curved passage, and an outer component selected from the other of the impeller housing and the interstage component, forms the outer wall surface along the entire length of the curved passage,
• wherein in the cross-section, the inner component contacts the outer component at a first position along the outer wall surface, that is offset in the first direction from a second position located on the inner wall surface at the second end of the curved passage, and the outer wall surface faces the inner wall surface in the second direction at the first position,
• wherein a first width of the inner component forming the inner wall surface is taken in the first direction at the second end of the curved passage,
• wherein the inner component forms a portion of the outer wall surface adjacent to the first position, and
• wherein a second width of the inner component taken in the first direction along the outer wall surface is less than the first width.

A compressor comprising:

• an impeller housing accommodating a first impeller configured to compress a fluid and a second impeller configured to further compress the fluid;
• and
• an interstage component coupled to the impeller housing,
• wherein the interstage component and the impeller housing form an interstage passage that is configured to direct the fluid from the first impeller to the second impeller in a flow direction,
• wherein the interstage passage includes a curved passage configured to change the flow direction between a first direction and a second direction,
• wherein the curved passage has a first end that is oriented to direct the fluid in the first direction and a second end that is oriented to direct the fluid in the second direction,
• wherein in a cross-section of the interstage passage taken in a plane that extends along the flow direction, the curved passage is formed between an inner wall surface and an outer wall surface of the interstage passage,
• wherein an inner component selected from the impeller housing and the interstage component, forms the inner wall surface along an entire length of the curved passage, and an outer component selected from the other of the impeller housing and the interstage component, forms the outer wall surface along the entire length of the curved passage,
• wherein in the cross-section, the inner component contacts the outer component at a first position along the outer wall surface, that is offset in the first direction from a second position located on the inner wall surface at the second end of the curved passage, and the outer wall surface faces the inner wall surface in the second direction at the first position, and
• wherein in a transverse cross-section of the curved passage taken orthogonally to the flow direction, the inner wall surface is linear and the outer wall surface is curved convexly relative to the inner wall surface.