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A steam turbine has a rotor mounting axially spaced rotor wheels having male dovetails for mounting a plurality of axially spaced buckets having female dovetails. A plurality of arcuate bridging members extend axially between the axially adjacent bucket dovetails at locations spaced radially outward

A steam turbine has a rotor mounting axially spaced rotor wheels having male dovetails for mounting a plurality of axially spaced buckets having female dovetails. A plurality of arcuate bridging members extend axially between the axially adjacent bucket dovetails at locations spaced radially outwardly of the surface of the rotor shaft. A diaphragm in radial opposition to the bridging member mounts a brush seal having bristles engaging the bridging member. The bridging member carries backup labyrinth seal teeth for sealing with the diaphragm. The friction generated by contact between the brush seal bristles and bridging members lies radially outwardly of the rotor whereby non-uniform distribution of heat about the rotor surface due to frictional contact with the brush seal is avoided, with consequent avoidance of rotor bowing.

대표청구항 ▼

A steam turbine has a rotor mounting axially spaced rotor wheels having male dovetails for mounting a plurality of axially spaced buckets having female dovetails. A plurality of arcuate bridging members extend axially between the axially adjacent bucket dovetails at locations spaced radially outward

A steam turbine has a rotor mounting axially spaced rotor wheels having male dovetails for mounting a plurality of axially spaced buckets having female dovetails. A plurality of arcuate bridging members extend axially between the axially adjacent bucket dovetails at locations spaced radially outwardly of the surface of the rotor shaft. A diaphragm in radial opposition to the bridging member mounts a brush seal having bristles engaging the bridging member. The bridging member carries backup labyrinth seal teeth for sealing with the diaphragm. The friction generated by contact between the brush seal bristles and bridging members lies radially outwardly of the rotor whereby non-uniform distribution of heat about the rotor surface due to frictional contact with the brush seal is avoided, with consequent avoidance of rotor bowing. s through a post, said guide structure comprising: a cable guide member for guiding a cable attached to said movable body in a manner which prevents said cable from interfering with said casters upon movement of said movable body or rotation of said horizontally rotatable portion; a cylindrical case which can rotate freely around said post but independently of the rotation of the post; and wherein said cable guide member is fixed to said cylindrical case and extends from said case to support said cable as it runs through a space over said legs. 5. A cable guide structure for a movable body which has legs, casters attached to said legs, and a horizontally rotatable portion supported on said legs through a post, said guide structure comprising: a cable guide member for guiding a cable attached to said movable body in a manner which prevents said cable from interfering with said casters upon movement of said movable body or rotation of said horizontally rotatable portion; a cylindrical case which can rotate freely around said post but independently of the rotation of the post; wherein said cable guide member is fixed to said cylindrical case and extends from said case to support said cable as it runs through a space over said legs wherein said cable guide member rotates freely around said post, and its rotation is independent of the rotation of the post. 6. A cable guide structure for a movable body which has legs, casters attached to said legs, and a horizontally rotatable portion supported on said legs through a post, said guide structure comprising: a cable guide member for guiding a cable attached to said movable body in a manner which prevents said cable from interfering with said casters upon movement of said movable body or rotation of said horizontally rotatable portion; a cylindrical case which can rotate freely around said post but independently of the rotation of the post; wherein said cable guide member is fixed to said cylindrical case and extends from said case to support said cable as it runs through a space over said legs, wherein said cable guide member rotates freely around said post, and its rotation is independent of the rotation of the post; and wherein said cylindrical case comprises a plurality of concentric cases which can rotate with respect to each other, said cable guide member being fixed to one of said concentric cases which is farthest from said post, and said cable guide member rotates freely and independently from the rotation of said post.