Rotary machine

A rotary machine, comprising:

• a rotational shaft;
• an impeller mounted to the rotational shaft;
• an impeller housing accommodating the impeller;
• a bearing housing accommodating a bearing which supports the rotational shaft rotatably, the bearing housing being fastened to the impeller housing;
• and
• a fastening member fastening the impeller housing and the bearing housing in an axial direction of the rotational shaft,
• wherein the impeller housing includes, at a fastening part to which a fastening force is applied by the fastening member, impeller-housing side contact surfaces extending in a direction which intersects with an axial direction of the rotational shaft, the impeller-housing side contact surfaces including an impeller-housing side first contact surface in contact with the fastening member and an impeller-housing side second contact surface in contact with the bearing housing,
• wherein the bearing housing includes, at the fastening part, bearing-housing side contact surfaces extending in a direction which intersects with the axial direction of the rotational shaft, the bearing-housing side contact surfaces including a bearing-housing side first contact surface in contact with the fastening member and a bearing-housing side second contact surface in contact with the impeller housing,
• wherein the fastening member includes fastening-member side contact surfaces extending in a direction which intersects with the axial direction of the rotational shaft, the fastening-member side contact surfaces including a fastening-member side first contact surface in contact with the impeller housing and a fastening-member side second contact surface in contact with the bearing housing, and
• wherein a thin-plate member is interposed in at least one location between the impeller-housing side first contact surface and the fastening-member side first contact surface, between the bearing-housing side first contact surface and the fastening-member side second contact surface, or between the impeller-housing side second contact surface and the bearing-housing side second contact surface, the thin-plate member being provided separately from the impeller housing, the bearing housing, and the fastening member.

A rotary machine, comprising:

• a rotational shaft;
• an impeller mounted to the rotational shaft;
• an impeller housing accommodating the impeller;
• a bearing housing accommodating a bearing which supports the rotational shaft rotatably, the bearing housing being fastened to the impeller housing;
• and
• a fastening member fastening the impeller housing and the bearing housing in an axial direction of the rotational shaft,
• wherein the impeller housing includes, at a fastening part to which a fastening force is applied by the fastening member, impeller-housing side contact surfaces extending in a direction which intersects with an axial direction of the rotational shaft, the impeller-housing side contact surfaces including an impeller-housing side first contact surface in contact with the fastening member and an impeller-housing side second contact surface in contact with the bearing housing,
• wherein the bearing housing includes, at the fastening part, bearing-housing side contact surfaces extending in a direction which intersects with the axial direction of the rotational shaft, the bearing-housing side contact surfaces including a bearing-housing side first contact surface in contact with the fastening member and a bearing-housing side second contact surface in contact with the impeller housing,
• wherein the fastening member includes fastening-member side contact surfaces extending in a direction which intersects with the axial direction of the rotational shaft, the fastening-member side contact surfaces including a fastening-member side first contact surface in contact with the impeller housing and a fastening-member side second contact surface in contact with the bearing housing, and
• wherein at least one of the impeller-housing side first contact surface, the impeller-housing side second contact surface, the bearing-housing side first contact surface, the bearing-housing side second contact surface, the fastening-member side first contact surface, or the fastening-member side second contact surface includes at least one recess portion.