JPS61157488A - Brake/drive unit of turret mooring boat - Google Patents

Abstract

PURPOSE:To suppress an impact to a brake drive unit by moving a frame, which supports both a pinion engaged with the rack of a turret flange jaw part and a power unit, in such direction that the frame can be slided in the direction at right angles with the tangential line of the rack-and-pinion engaging part. CONSTITUTION:A guide rail 400 is provided along the flange part 101 of a turret 100 and has a rack 1 shaped along the circumference of the rail. A pinion 2 which can be driven by an oil motor 3 or the like is engaged with rack 1 so that the turret 1 can be turned. Pinions 42a and 42b of plates 43a and 43b projecting from a frame 4 which supports the pinion 2 and the oil motor 3 are engaged in the lateral slots 41a and 41b on hinges 40a and 40b which are placed upright on an upper deck so that the pinions 42a and 42b can be slided in the direction at right angles with the tangential line of the rack-and-pinion engaging part. An impact which is produced against the rack-and-pinion engaging part when a boat is swung can thereby be suppressed effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to improvements in brake/drive units in turret mooring vessels.

[Conventional technology]

There is a worldwide trend for offshore oil fields to be developed in deep water areas, areas with poor sea conditions, or abandoned areas with low reserves. So-called turret vessels are attracting attention.

As shown in FIG. 3, a turret 100 having a cylindrical upper part and a flange part 101 (decker part) T- is inserted into a through hole 110 formed in the center of a hull 120. A bearing device consisting of a plurality of support rollers 13G that can be raised and lowered is provided around the through hole 110 on the hull, and mooring cables 14 extending radially in all directions around the turret 100 are provided.
When the turret 100 is twisted to some extent due to the turning of the hull 12G due to tidal currents, etc., the bearing device is raised so that the turret 100 can rotate, and the brake/drive unit is used to brake or prevent the rotation while the mooring line 140 is twisted to a certain extent. A modification is made to rotate the turret 100t back.

FIG. 4 shows an example of a conventionally used brake/drive unit. The structure is such that the rack 150t is fixed to the turret flange 101, and the rack 150t is fixed to the turret collar 101.
50 and pinion 151 mesh, this pinion 151
A power unit 152 consisting of a hydraulic motor or the like is attached to the shaft, a hinge 153 is provided on the hull deck 121, and a frame 154 is provided around the hinge 153 that can rotate outward of the turret 100 as shown by the arrow. The power unit 152 is supported by this frame 154.

[Problem that the invention seeks to solve]

In such a ship, horizontal force based on the tension of the mooring line 140 acts on the turret 100 as the hull 120 swings back and forth and left and right, and the turret 100 is moved through the through hole 110.
horizontally moving the child in the radial direction. In the brake/drive unit, when the turret 100 moves in the tangential direction of the collar where the rack 150 and the top pinion 151 engage, the pinion 151 rotates fully to absorb the impact on the brake/drive unit induced by the movement. However, the turret 1 is placed in the direction perpendicular to the tangent line.
If 00 moves, frame 1 is centered on hinge 153.
By rotating the turret 54 in the direction of the arrow, the impact on the brake/drive unit is alleviated to some extent. However, the actual movement of the turret 100 is often a combination of the above movement directions, and the amount of movement is large. If it becomes
It is almost impossible to absorb the shock to the brake/drive unit.The present invention was made to solve the above problem, and it is impossible to absorb the shock to the brake/drive unit due to the movement of the turret. [Means for solving the problem] Therefore, the present invention provides a frame that fully supports the pinion and the power unit, and also provides a flange portion where the pinion meshes with the rack. The basic feature is that the frame is installed on the hull deck so as to be able to slide in the tangentially perpendicular direction, and that the frame is slidably engaged with the circumference of the turret collar, which rotates completely.

[Effect]

According to such a structure, even if the turret moves considerably in the direction perpendicular to the tangent to the collar where the rack and pinion engage, the frame that supports the pinion and power equipment f remains engaged around the turret collar. Therefore, the frame moves together with the turret, and since this frame is installed on the hull deck so that it can slide in the same direction as the above, it follows the movement of the turret and moves horizontally in the same direction. Even if the turret moves in the tangential direction of the flange at the same time, the pinion spins idly, so the combined movement of the turret in the tangential direction of the flange and in the direction perpendicular to the tangent 0 [Example] Figure 1 shows an example of the present invention, where 0100 is a turret, 101 is a turret flange, and 121U is a hull deck. has been announced.

In the figure, a guide rail 400t is provided around the outer circumferential side of the turret flange 101, and a rack 1 made of a pin rack is fixed to the outer side of the guide rail 400t.

A pinion 2 meshes with the rack 1 and is also pivotally connected to a power device 3 consisting of an oil motor, and the pinion 2 is rotated or stopped by rotational driving or braking of the power device 3. Then, the pinion 2 is rotated and stopped via the black 1 (turret) 10G? You can rotate it and brake its rotation.

The pinion 2 and power unit 3 described above are attached to the frame 4 between the turret collar 101 and the hull deck 121. That is, frame 4 is U as shown in FIG.
It consists of a letter-shaped frame, and a pinion 2t is attached to the inner recess of the frame, and is supported horizontally with respect to the entire hull deck 121. As described above, the power unit 3 which is pivotally attached to the pinion 2 is vertically fixed to the upper part of the frame 4. Further, this frame 4 is installed on the hull deck 121 in the following manner. That is, as shown in FIG. 1 and FIG. 2 which is a plan view thereof, hinges 40a and 40b are installed on the hull deck 121.
T-fixed horizontal holes 41a, 41 that are long in the same direction as the direction A perpendicular to the tangent to the collar where the pinion 2 and rack 1 engage.
b is bored in the hinges 40a, 40b, and the horizontal holes 41a, 41b are connected to the bottle 42a.
, 42b Plate 43 extending from t-frame 4
a and 43b, respectively. Furthermore, as shown in FIG. 2, the open side of the frame 4 is connected to the guide rail 4.
00 side to form upper arms 44a, 44b and lower arm 45a (one of the lower arms is not shown in the drawing),
A guide wheel 46a is transferred from the upper and lower arms 44a + 44b e 45a to both sides of the guide rail 400 by being clamped thereto.

47a and 46b (one of the guide wheels is not visible on the drawing) 1 - provided, in addition, upper arms 44a, 44b
The guide rail 400 is equipped with guide rollers 48a and 48b' that roll on the upper surface from the lower surface.

With the above configuration, the frame 4 can be attached to the hull deck 12.
1 and the circumference υ of the rotating turret flange 101, and when the turret 100 is working in the entry direction, the hull of the frame 4 is moored to the turret flange 101 as described above. Deck 121 side installation is a pier
42a and 42b are hinges 40a.

40b, the seven frames 4 supporting the pinion 2 and the power unit 3 slide in the entry direction.

Moreover, as mentioned above, the turret 100 is placed in the tangential direction B of the collar.
When the pinion 2 moves, the pinion 2 rotates idly, so even when the turret 10G moves in the combined direction of A and B,
This will absorb the impact on the brake/drive unit.

〔Effect of the invention〕

As explained above and summarized, the brake/drive unit of the present invention supports the pinion and power unit even if the turret moves considerably in the direction perpendicular to the tangential line of the collar where the pinion and rack engage due to the rocking of the ship. 7 frames can slide in the same direction and follow the movement of the turret, so the movement in 0 or more directions (in the tangential direction of the flange) can completely absorb the impact on the drive unit (in the pre-figure). The movement is added as the movement of the turret f″m
eK4・1°""@turn'! "5', 7'-", f, q as mentioned above, also has the effect of being able to absorb the impact of these sliding parts.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a plan view of the previous version, Fig. 3 is a schematic diagram showing an outline of a conventional turret mooring ship, and Fig. 4 is a conventional brake/drive unit. FIG. In the figure, 1 and 150 are racks, 2 and 151 are pinions,
3, 152 is a power unit, 4, 154 is a frame, 1
00 is the turret, 101 is the turret flange, 12
0 indicates the hull, and 121 indicates the hull deck. Patent applicant: Nippon Kokan Co., Ltd. Inventor: Ishi 1) Zama Teramoto Hatama
Hide Hattori Doma
Masanori Hatake
Masao Endo s1 Figure 2 Figure 3

Claims (1)

[Claims] A brake/drive unit for a turret mooring ship having a rack fixed to a turret collar, a pinion meshing with the rack, and a power device pivoted on the pinion, including a frame that supports the pinion and the power device. In addition, a frame is installed on the hull deck so that the pinion can slide in a direction perpendicular to the tangent to the flange that engages with the rack, and the frame is slidably engaged around the rotating turret flange. Brake/drive unit for turret mooring vessels.