JPS6141698A - Marine side thruster - Google Patents

Abstract

PURPOSE:To improve steerability in a ship, by installing a movable fine in injection ports formed at both sides of the ship and freely selecting the injection directions of water to be pumped up from the bottom with the movable fin controlled. CONSTITUTION:A duct 3 is formed along the breadth direction of a ship 1 and both ends of this duct 3 are opened at both sides of the ship, forming each injection port 31. A stream control valve 32 is supported at both sides of a rotary shaft 23 by a fulcrum shaft 33 and an around a boundary between a suction port 2 and the duct 3, capable of rotatin along the vertical surface, whereby a flow direction of water to be fed to the duct 3 is controllable. Each movable fin 34 is attached to these injection ports 31 at both sides and is rotated along a horizontal plane by a driving source, thus a thrust in the optional direction is secured.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a marine side thruster, and more particularly, to a marine side thruster that allows the direction of the side thruster of a ship body to be freely selected.

[Prior art 1] A conventionally known side thruster is an auxiliary propulsion device that generates a lateral thrust on a ship's hull, and is used for lateral movement such as when a ship approaches a berth, or for turning navigation. It is also used on work boats such as The structure is that an impeller is installed in a duct that runs through the hull laterally, and as the impeller rotates, seawater sucked up from the bottom of the ship is spouted out from either the left or right duct, causing the ship to move laterally. It is designed to let you do so. Such side thrusters can only generate thrust in a direction of 90 degrees with respect to the hull, and some improvement is awaited in areas other than lateral movement. Additionally, ships generally have extremely poor maneuverability when sailing at low speeds.
This is because the ship relies on a rudder that generates thrust using the fluid force behind the stern, and there is a desire to develop an auxiliary propulsion system that can efficiently steer the ship at low speeds. [Problems to be Solved] Therefore, the present invention aims to make the hull capable of generating thrust not only in the lateral direction but also in any direction, thereby improving lateral movement in any direction and maneuverability during low-speed navigation. The purpose is to [Technical means for solving the problem] In order to achieve the above-mentioned objects, the present invention provides a duct that extends in both shipboard directions and is open at both ends, continuous with a suction port drilled in the bottom of the ship. A movable fin is attached to the spout of the duct, and the direction of the ejected water flow is changed by controlling the movable fin to obtain thrust in any direction. [Embodiments] The present invention will be described below with reference to embodiments shown in the accompanying drawings. First, in the figure, the symbol J5 and @1 indicates the bottom part of the hull, and in the center of the bottom 1 there is a seawater inlet 2 with a square cross section, and reinforcing plates 2a are provided at its four corners. A filter 21 is connected to this suction port 2,
An impeller 22 is arranged inside this filter 21,
A circular lining material 22a is provided around the impeller 22. The rotating shaft 23 of this impeller 22 is supported by a bearing 24 provided at the suction port 2, and the rotating shaft 23 is connected to a motor or the like provided inside the hull via a coupling 25.
It is connected to the I11 section 26. A duct 3 having a rectangular cross section is formed along the direction perpendicular to the suction port 2, in other words, along the width direction of the ship's hull 1, and both ends of the duct 3 are open on both sides to form a spout. 31, and the spout 31 has a bell mouth to reduce resistance during navigation, and the central portion of the duct 3 is shaped to communicate with the suction port 2. The cross-sectional shape of the duct 3 is not only rectangular but also circular, but it is square with movable fins, which will be described later. Then, near the boundary between the suction port 2 and the duct 3, a water flow Ill till valve 32 is connected to the supporting shaft 33 on both sides of the rotating shaft 23.
It is supported by, can rotate along a vertical plane, and has a
It is possible to control the direction of the flow of water into the duct 3 by rotating it to the full extent and by turning it to the OFF position to fully open it. A movable fin 34, which is a set of a plurality of fins, is attached to the left and right jet ports 31, and is configured to be able to rotate along a horizontal plane by a drive source to be described later. As shown in FIG. 3, the movable fins 34 have the longest central fin 34a, the longest fin 34b,
c gradually becomes shorter so that it is not interfered with by the duct 3 when J5 rotates and lζJA occurs. All the fins are pivotally connected to a movable rod 36 via links 35, and can be rotated to appropriate angles by levering the movable rod 36. Next, the drive system of the water flow 11i1111 valve 32 and the movable fin 34 will be explained. First, the left and right movable fins 34 are driven by a single hydraulic cylinder unit 4, and the hydraulic cylinder unit 4 is connected to a drive block 6 via an lj control block 5. Inside the cylinder of the hydraulic cylinder unit (Yo, the left to the left 41- and the right chamber 4R are separated by the piston 4a, and the winter sky 4L, 4
Oil passages 41 and 42 are connected to R, respectively. The piston rod 4b is a lever 4 that rotates around a pivot point 43a.
The lever rod 43 is connected to one end of a connecting rod 44 whose end is connected to the movable rod 3G. The control block 5 has a pilot check valve 51.52 and a check valve 53.54 in series with each oil passage 41.42, and a check valve 53.5.
Throttle valves 55, 56 are connected in parallel with 4. This pilot check pulp 51.52+ is designed to hear when the pilot pressure of the check valve 53.54 is applied. Additionally, these pilot check valves. Oil passages 57 and 58 with check valves and throttle valves are connected to a switching valve 59, which has a normally open position in the center and which is connected to the drive block 6.
Oil passages 61 and 62 extend therein. That is, the drive block connects the pump 6 to the pressure oil delivery oil path 61.
3. Check valve 64. A stop valve 65 is incorporated, a check valve 66 is incorporated in the oil passage 62, and the oil passage 61 and the oil passage 62 are connected by a pressure regulating oil passage 68 having a relief valve 67. Reference numeral 69 indicates an oil tank, and reference symbol @1 indicates a hydraulic cylinder unit that drives the left and right water flow control valves 32. 61 and 62, respectively. Next, the relationship between the direction of the movable fins 34 and the direction of the thrust applied to the hull is schematically shown in FIGS. 6a to 6j. It will be appreciated that lateral movements, intermediate movements in each direction of movement, are possible. In addition, in the case of normal forward navigation, the resistance at the frontage of the duct 3, the so-called spout 31 portion, can be reduced by turning all the movable fins 34 rearward and closing the spout 31. In addition, in the above explanation, the water flow control valve 32 is provided in the duct 3 to open and close the duct 3 leading to the left and right spouts 31, but the spout 31 can be opened and closed by the movable fins 34. By doing so, the water flow! 1J
The valving valve 32 can also be omitted. (Effect of the Invention 1 As is clear from the above explanation, the side thruster of the present invention has movable fins on the spout ports formed on both sides of the ship's hull, and the jet direction of the water sucked up from the bottom of the ship can be freely controlled by controlling the movable fins. Since it is configured so that it can be selected, it is effective as auxiliary propulsion R1ff1 of a ship, and can particularly improve steering performance at low speeds.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of a ship body equipped with a nide thruster according to the present invention, FIG. 2 is a plan sectional view taken along the line If-II in FIG. 1, and FIG. 3 is a plan sectional view taken along the line III-Ml in FIG.
Figure 4 shows movable fins and water 5! FIG. 5 is an explanatory diagram showing the drive system of the Luli control valve, FIG. 5 is an explanatory diagram showing the relationship between the movable fin and the hydraulic cylinder unit, and FIG. 6 is an explanatory diagram without showing an example of the thrust direction. 1...Bottom, 2...Suction port, 21...Filter, 22...Impeller, 23...
Rotating shaft, 24... Bearing, 25... Coupling, 2
6... Drive unit, 3... Duct, 31... Spout, 32... Water flow control valve, 33...
Support shaft, 34... Movable fin, 35... Link, 36
...Movable rod, 4...Hydraulic cylinder unit, 41, 42...Oil passage, 5...Control block, 51, 52...Pilot check pulp, 53.5
4... Check valve, 55.56... Throttle valve, 5
7.58... Oil passage, 59... Switching valve, 6... Drive block, 61... Delivery oil passage, 62... Oil passage, 63... Pump, 64.86... Check valve, 65...Stopper valve, 67...Relief pulp, 68...Pressure adjustment oil path, 69...Oil tank, 7...Water flow! 1J valve hydraulic cylinder unit, 8.
・・llll121I block. Patent Applicant Nakashima Propeller Co., Ltd. Agent Patent Attorney Sugi Ko・Jundo Nobu Patent Attorney Murai Six Advance Gods

Claims (1)

[Claims] (1) A suction port drilled in the bottom of the ship, a duct communicating with the suction port and each end of which is open on the side of the ship, and a movable fin provided at the spout of the duct;
A marine side thruster comprising driving means for rotating the movable fin within an appropriate range, and configured to be able to apply thrust in any direction to the hull by controlling the movable fin.