JP2018122717A5 - - Google Patents

Description

As described above, in the ship friction reducing device according to the fifth embodiment, the auxiliary air supply pipe 46 and the auxiliary passage 53 are provided as a main passage branched from the middle portion of the auxiliary air supply pipe 46, and the auxiliary air supply pipe is provided. 46 and the sub-passage 53 are connected to the gas chamber 41, and on-off valves 54 and 55 are provided, respectively. Therefore, when the sub air supply pipe 46 in use is blocked by foreign matter such as marine organisms, the on / off valve 54 of the sub air supply pipe 46 is closed to disable use, and the on / off valve 55 of the sub passage 53 is opened for use. By making it possible, the device can be used over a long period of time.

10 Hull 11 Bow 12 Stern 13 Bottom 14 Port side (ship side)
15 Starboard (ship side)
21 Air supply equipment room 27 Ship bottom skin 28, 29 Ship side skin 31 Friction reduction device 32 Air supply device 33 Air cooler 34 Ventilation cylinder 35 Air suction port 36, 37 Air blowing portion 38 Seawater intake portion 39 Pump 41 Gas chamber 42 Air blowout Port 43 Compressor 44 Main air supply pipe 45 Main chamber 46 Sub air supply pipe (air supply passage)
61 Ceiling part 62 First side wall part 63 Second side wall part 64, 64A , 101 Container 65, 102 Collision plate 66 Partition plate 67, 67a, 67b, 67c, 67d, 67e, 104 Through hole 103 Partition cylinder (partition plate)
S1 Air supply space S2, S21, S22, S23, S24, S25 Air circulation space X Captain direction Y Ship width direction Z Ship height direction

Claims (10)

A gas chamber provided inside the hull;
A partition wall that partitions the gas chamber and the outside of the hull;
A plurality of air outlets provided in the partition wall;
A compressor,
An air supply passage in which a passage area connecting the compressor and the gas chamber and communicating with the gas chamber is set to an area smaller than an opening area of the air outlet;
A container that covers and partitions the air outlet in the gas chamber;
A plurality of through holes provided at predetermined positions of the container that do not oppose the connection portion of the air supply passage to the gas chamber;
Bei to give a,
The plurality of air outlets are provided along the width direction of the hull, and the container covers the plurality of air outlets ,
The container is composed of one collision plate and two partition plates, each end portion in the longitudinal direction is connected to a side wall portion of the gas chamber, the side wall portion to which the partition plate is not connected, and the two A predetermined gap is provided between the partition plates ,
A ship friction reducing device characterized by that.   The plurality of air outlets are provided along the width direction of the hull, a plurality of the through holes are provided corresponding to one air outlet, and the area of the air supply passage is 1 2. The ship friction reducing device according to claim 1, wherein the area is set to an area smaller than an opening area of each of the air outlets.   3. The ship friction reducing device according to claim 2, wherein the one through hole has a passage area smaller than an opening area of the one air blowing port.   The container includes a collision plate disposed at a position facing a connection portion of the air supply passage to the gas chamber, and a partition plate that connects the collision plate and the partition wall, The ship friction reducing device according to any one of claims 1 to 3, wherein the friction reducing device is formed on the partition plate.   The gas chamber has a ceiling portion facing the partition wall and a side wall portion connecting the partition wall and the ceiling portion, and a predetermined gap is provided between the side wall portion and the partition plate. The ship friction reducing device according to claim 4, wherein:   The ship through friction reducing device according to any one of claims 1 to 5, wherein the through hole is provided close to the partition wall side. The ship's friction reduction device according to any one of claims 1 to 6, wherein the container is provided with a partition plate that is partitioned for each of the air outlets. The friction of a ship according to any one of claims 1 to 7 , wherein a plurality of the through holes are provided in the container, and a detachable plug is attached to at least one of the through holes. Reduction device. The air supply passage is branched from an intermediate portion to be provided with a main passage and a sub-passage, and the main passage and the sub-passage are respectively connected to the gas chamber and provided with an on-off valve. The ship friction reducing device according to any one of claims 1 to 8 . The ship compressor according to any one of claims 1 to 9 , wherein the compressor is capable of supplying compressed air of 500 kPa or more to the gas chamber.