Patent ID: 8251682
Filing Date: 2012-08-28
Classification: F01C,F04C

Abstract:
1. A multi-stage rotary type expander comprising: a shaft having a first eccentric portion and a second eccentric portion vertically along its axis; a first piston attached to the first eccentric portion and performing eccentric rotational motion; a first cylinder disposed such that a portion of an inner surface thereof is in contact with the first piston; a first vane disposed reciprocably in a first vane groove provided in the first cylinder, the first vane dividing, by a leading end thereof being in contact with the first piston, a space between the first cylinder and the first piston into a first intake-side space and a first discharge-side space; a second piston attached to the second eccentric portion and performing eccentric rotational motion; a second cylinder disposed such that a portion of an inner surface thereof is in contact with the second piston; a second vane disposed reciprocably in a second vane groove provided in the second cylinder, the second vane dividing, by a leading end thereof being in contact with the second piston, a space between the second cylinder and the second piston into a second intake-side space and a second discharge-side space, and receiving a force toward the second piston produced by a high-pressure atmosphere outside the second cylinder; an intake passage for allowing a working fluid before expansion to be taken into the first intake-side space; a connecting passage for forming a working chamber, the connecting passage connecting the first discharge-side space and the second intake-side space, wherein the working fluid expands in the working chamber; and a discharge passage for allowing the working fluid after expansion to be discharged from the second discharge-side space, wherein the second vane applies to the first vane a force in a direction toward the first piston when the second vane moves toward the second piston side, the first vane and the second vane are constituted by separate components, and their relative positional relationship is permitted to be varied, the multi-stage rotary type expander further comprises a transferring member for transferring a force acting on the second vane to the first vane to link a movement of the first vane to a movement of the second vane, the transferring member is a coupling member for coupling the first vane and the second vane, and the coupling member is movable in a direction perpendicular to a direction of reciprocating motion of the first vane.