Controllable pitch tunnel thruster for ship positioning |
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| 申请号 | US19203671 | 申请日 | 1971-10-26 | 公开(公告)号 | US3759211A | 公开(公告)日 | 1973-09-18 |
| 申请人 | GLOBAL MARINE INC; | 发明人 | KUNTZ F; | ||||
| 摘要 | A ship is described having a transverse thruster arranged in a tunnel running athwartship preferably, for example, near the bow so as to enhance steering or for slowly moving the ship sideways. The thruster comprises a movable portion of the tunnel wall having inwardly extending blades. The movable wall and blades are driven together in rotation about the axis of the tunnel so that the blades propel water therethrough. In addition, the pitch of the blades relative to a plane transverse to the tunnel axis is controllable for continuous variation of thrust from a maximum in one direction to a maximum in the opposite direction. Means are provided for controlling pitch of the blades while the thruster is rotating. | ||||||
| 权利要求 | 1. In a ship with a transverse thrust tunnel, an improved thrust controlling and reversing apparatus comprising: a fixed tunnel wall; a movable portion of tunnel wall; means for mounting the movable portion for rotation about the tunnel axis; means for driving the movable portion of tunnel wall; a plurality of blades extending inwardly from the movable portion of tunnel wall and connected for rotation therewith about the tunnel axis; and means for controlling pitch of the blades relative to a plane transverse to the tunnel axis comprising: a ring around the movable tunnel wall portion; means interconnecting each of the inwardly extending blades to the ring for controlling pitch in response to ring position; means for changing the position of the ring relative to the movable tunnel wall portion; a blade-supporting plate connected to each blade; means for mounting each of the blade-supporting plates in the movable tunnel wall portion for rotation about an axis transverse to the tunnel axis; a pin mounted eccentrically on each of the blade-supporting plates; and a camming slot extending helically on the ring engaging each of the pins; and wherein the means for changing position comprises means for shifting phase of rotation of the ring relative to rotation of the movable tunnel wall portion. 2. In an improved thrust controlling and reversing apparatus as defined in claim 1, means for shifting phase of rotation comprising: a driving gear on the movable tunnel wall portion; a driven gear on the ring; and a differential gear interconnection between the driving gear and the driven gear. 3. In a ship with a transverse thrust tunnel, an improved thrust controlling and reversing apparatus comprising: a fixed tunnel wall; a movable portion of tunnel wall; means for mounting the movable portion for rotation about the tunnel axis; means for driving the movable portion of tunnel wall; a plurality of blades extending inwardly from the movable portion of tunnel wall and connected for rotation therewith about the tunnel axis; and means for controlling pitch of the blades relative to a plane transverse to the tunnel axis comprising: a ring around the movable tunnel wall portion, means interconnecting each of the inwardly extending blades to the ring for controlling pitch in response to ring position, means for changing the position of the ring relative to the movable tunnel wall portion, a blade-supporting plate connected to each blade, means for mounting each of the blade-supporting plates in the movable tunnel wall portion for rotation about an axis transverse to the tunnel axis, a pin mounted eccentrically on each of the blade-supporting plates; and a camming slot in the ring engaging each of the pins; and an internal surface on the movable tunnel wall portion in the form of a zone of a spherical surface; and wherein the blade-supporting plates have an internal surface in the form of a continuation of the zone of a spherical surface. 4. In a ship with a transverse thrust tunnel, an improved thrust controlling and reversing apparatus comprising: a fixed tunnel wall; a movable portion of tunnel wall; means for mounting the movable portion for rotation about the tunnel axis; means for driving the movable portion of tunnel wall; a plurality of blades extending inwardly from the movable portion of tunnel wall and connected for rotation therewith about the tunnel axis; a blade-supporting connected to each blade, the surface of the blade-supporting plate being substantially a continuation of the internal surface of the movable tunnel wall portion; means for mounting each of the blade-supporting plates in the movable tunnel wall portion for rotation about an axis transverse to the tunnel axis; and means for synchronously rotating the blade-support plates for changing pitch of the blades relative to a plane transverse to the tunnel axis. 5. In a ship with a transverse thrust tunnel, an improved thrust controlling and reversing apparatus comprising: a fixed tunnel wall; a movable portion of tunnel wall; means for mounting the movable portion for rotation about the tunnel axis; means for driving the movable portion of tunnel wall; a plurality of blades extending inwardly from the movable portion of tunnel wall and connected for rotation therewith about the tunnel axis; an internal surface on the movable tunnel wall portion in the form of a zone of a spherical surface; a blade-supporting plate connected to each blade, each of the blade-supporting plates having an internal surface in the form of a continuation of the zone of a spherical surface; means for mounting each of the blade-supporting plates in the movable tunnel wall portion for rotation about an axis transverse to the tunnel axis; and camming means for synchronous rotating the blade-supporting plates for changing pitch of the blades relative to a plane transverse to the tunnel axis. 6. In an improved thrust controlling and reversing apparatus as defined in claim 5, an improved means for rotating the blade support plates comprising: a ring around the movable tunnel wall portion and rotatable therewith; camming means interconnecting each of the blade support plates and the ring for camming rotation of the blade support plates in response to shift of the phase of rotation of the ring relative to rotation of the movable tunnel wall portion. 7. In an improved thrust controlling and reversing apparatus as defeind in claim 6, improved means for shifting phase of rotation comprising: a driving gear around the movable tunnel wall portion; a driven gear around the ring; and a differential gear interconnection between the driving gear and driven gear. |
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