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In a driving system comprising an engine, a plurality of motor-generators and a plurality of coaxial differential mechanisms, rotating output axes of the plurality of motor-generators are disposed parallel to and opposite to a rotating output axis of the engine. The coaxial differential mechanisms a

In a driving system comprising an engine, a plurality of motor-generators and a plurality of coaxial differential mechanisms, rotating output axes of the plurality of motor-generators are disposed parallel to and opposite to a rotating output axis of the engine. The coaxial differential mechanisms are arranged between the engine and the motors. The coaxial differential mechanisms are disposed so that straight lines passing through rotating axes of at least two of the coaxial differential mechanisms are parallel to each other, and the output power of the engine is transmitted to the coaxial differential mechanisms through gears. It is possible to provide a small sized and high productive driving system.

대표청구항 ▼

In a driving system comprising an engine, a plurality of motor-generators and a plurality of coaxial differential mechanisms, rotating output axes of the plurality of motor-generators are disposed parallel to and opposite to a rotating output axis of the engine. The coaxial differential mechanisms a

In a driving system comprising an engine, a plurality of motor-generators and a plurality of coaxial differential mechanisms, rotating output axes of the plurality of motor-generators are disposed parallel to and opposite to a rotating output axis of the engine. The coaxial differential mechanisms are arranged between the engine and the motors. The coaxial differential mechanisms are disposed so that straight lines passing through rotating axes of at least two of the coaxial differential mechanisms are parallel to each other, and the output power of the engine is transmitted to the coaxial differential mechanisms through gears. It is possible to provide a small sized and high productive driving system. m a connect position for mechanically interconnecting the male disconnect member and the female disconnect member to a release position for releasing the male disconnect member from the female disconnect member upon reciprocating the upper riser relative to the lower riser; and a subsea riser valve positioned below the riser interconnection device to seal off an interior of a lower riser when the riser interconnection device is in a release position, the subsea riser valve including a ball member rotatable between an opened position and a closed position in response to axial tension in the riser interconnection device. 62. The disconnect assembly as defined in claim 61, further comprising: a disconnect lockout device for preventing inadvertent disengagement of the riser interconnection device to the release position when the disconnect lockout device is in the lock position and for permitting disengagement of the riser interconnection device to the release position when the disconnect lockout device is in the unlocked position, the lockout mechanism extending radially outward of an outer surface of the male and female disconnect members for manipulation by a subsea ROV from the lock position to the unlock position. 63. The disconnect assembly as defined in claim 61, wherein the riser interconnection device comprises: a collet mechanism for preventing axial separation of the male disconnect member and the female disconnect member when in a latch position and for releasing the male disconnect member from the female disconnect member when in a release position, the collet mechanism including a collet ring circumferentially spaced around the outside of a latch mandrel, a plurality of collet fingers extending axially from the collet ring, each collet finger including a collet dog for engaging in a collet engagement groove in the female disconnect member, the collet fingers and collet dogs moving radially, rotationally and axially between a latch position and a release position, the collet engagement groove providing a stop surface for the collet dogs; and the latch mandrel for guiding movement of the collet mechanism between the latch position and the release position. 64. The disconnect assembly as defined in claim 63, wherein the collet mechanism cooperates with a slot in the latch mandrel such that the collet mechanism is axially and rotationally moveable between the connect position and the release position in response to substantially axial movement of the upper riser relative to the lower riser. 65. The disconnect assembly as defined in claim 61, wherein the male disconnect member is secured to the lower end of the upper riser and the female disconnect member is secured to the upper end of the lower riser. 66. The disconnect assembly as defined in claim 61, further comprising: a subsea riser valve lockout device for preventing premature movement of the ball member. 67. The disconnect assembly as defined in claim 61, further comprising: a drill pipe disconnect for selectively disconnecting a lower portion of a drill pipe string from an upper portion of a drill pipe string at a location below the valve, such that the upper portion of the drill pipe string is selectively disconnected from the lower portion of the drill pipe string before the male disconnect member is released from the female disconnect member. 68. The disconnect assembly as defined in claim 61, wherein the drill pipe disconnect is configured for reconnecting the upper drill pipe string and the lower drill pipe string after being disconnected. 69. A method of connecting and disconnecting a subsea riser disconnect sealingly connecting a lower riser extending downward through a seabed and into a subsea well bore with an upper riser extending downward from a floating drilling rig to the subsea riser disconnect, the l