Features

JIUMAX PLUS rope is a product designed to minimize movement of the core material, with a 12-strand ultra-high molecular weight polyethylene core covered with high-strength polyester material (jacket material). The
durable jacket improves grip and protects the rope from deterioration. JIUMAX PLUS rope has the following features due to the functions of the core and jacket.
1. It has little stretch, is resistant to corrosion and abrasion, and is excellent in preventing deterioration due to UV rays.
2. It is difficult to kink, easy to handle, and has a long service life.
3. It has the same or higher tensile strength as a wire rope of the same diameter, and weighs about 1/8.

*Rope is in complian with OCIMF Mooring Equipment Guidelines & ISO 2307
* Other sizes available upon request

Examples of standard products

Standard products available (for reference)

Features

• This is a commonly used type that achieves higher energy absorption and lower rebound power compared to conventional products.
• Performance can be adjusted by adjusting the internal pressure.

Specifications

*We can also provide quotes for sizes not listed in the table, so please contact us.

*We can also provide quotes for sizes not listed in the table, so please contact us.

Features

1. The inside is filled with a sponge-like EVA material (ethylene vinyl acetate) that is highly flexible and resilient.

2. The exterior is coated with reinforcing fiber and polyurea material, providing excellent impact resistance and abrasion resistance.

3. It has excellent resistance to cracks and splits caused by oysters and shells adhering to the shore, and does not require pressure management like air filling.

*EVA (Ethylene Vinyl Acetate)

• Cost-effective EVA foam fender
• We offer a wide variety of sizes and surface colors to meet your needs.

Specifications

*We can also provide quotes for sizes not listed in the table, so please contact us.

Features and Effects of Introducing the “Trimmer”

1. It reduces the labor required for skilled workers to adjust the height of blocks and the inclination of the top surface.
The top plate on the top of the “trimmer” can freely move 15 degrees on each side in the length direction and 7.5 degrees on both sides in the width direction.

In addition, the vertical stroke is 250 to 300 mm, so it automatically fits to the shape of the ship’s bottom.

2. There is no risk of damage to the hull due to excessive localized reaction forces
. The hull only receives reaction forces up to the support load. In addition, the reaction force is received evenly from the entire surface of the top plate.

3. Improves traffic and transportability in the culvert.
Since it is a self-supporting type that does not require piping or wiring for power, it can be moved freely and keeps the culvert neat.

4. Easy maintenance and high reliability.
The structure is simple and does not require piping or wiring. Stainless steel and anti-corrosive paint are used for the exterior, which is alternately exposed to seawater and air, and important parts such as valves are housed inside where they do not come into contact with seawater.

5. Partial replacement of the bottom shell can be easily performed.
Even when the hull is supported, the top plate can be lowered by operating the valve and the Trimmer body can be easily moved. It can also be easily restored by filling it with gas.

6. Dockside running gear can be used.
No side supports are required to prevent the hull from tipping over.

Introduction

An anti-rolling tank is a device (tank) that is installed to reduce the rolling of a ship. It reduces the rolling of a ship by moving the liquid inside the tank, such as water, in the opposite direction to the rolling moment caused by waves.

Introduction

RUPAS is a rudder with a smaller roundness at the tip and a hollow and parallel section at the rear end compared to conventional rudder cross sections. As a result, it has the characteristic that it can obtain high lift at the same rudder angle, while the rudder resistance (rudder angle 0°) is slightly smaller than conventional rudder.

Rupas

Conventional

Rudder Forces

When the rudder is at a certain angle (rudder angle) δ in the propeller wake, a direct force Fry is generated on the rudder.
The component parallel to the flow of the direct force is drag, and the perpendicular component is lift. Lift creates a moment that bends the ship.

Rudder Normal force & Resistance

The graph on the left compares the direct pressure of RUPAS and normal rudder at each rudder angle. From this graph, we can see that at the same rudder angle, RUPAS has about 12% greater direct pressure than normal rudder. Additionally, the graph on the right compares the rudder resistance of RUPAS and normal rudder at a rudder angle of 0°. From this graph, we can see that RUPAS has slightly less rudder resistance.

Comparison of direct pressure between normal rudder and RUPAS

Comparison of rudder resistance between normal rudder and RUPAS

Benefits

① By straightening the stern flow, it reduces hull resistance and also generates its own forward thrust.
② The thrust reduction coefficient (t) decreases due to its own thrust.
③ The wake coefficient (ω) increases due to its own presence and the induced speed to the propeller.
For the above reasons, SSDs are more effective when used on blunt ships equipped with high-load propellers.
・The effect varies depending on the propeller load and the bluntness of the ship, but energy savings of 3 to 8% can be expected.

Features

① By adopting SB, it is possible to reduce power by 3-7% at the same ship speed. ②
It has been adopted on over 800 ships.
③ It can be easily installed on existing ships as well as newly built ships.
④ The adoption of SB does not change the steering characteristics, so maneuverability remains the same.
⑤ As the SB is located behind the propeller, even if the SB is damaged, it will not lead to damage to the propeller. Of course, there has been no damage to the SB so far.
⑥ It is inexpensive, so the investment can be recovered in a short period of time.
⑦ The adoption of SB reduces vibration directly above the propeller.

SURF-BULB , an energy-saving device behind the propeller, achieves energy savings of 3% or more.

Principle

① Convert the rotating flow behind the propeller into forward thrust.
② Prevent the generation of propeller hub vortexes.
③ Improve propeller efficiency by generating wake gain.

SURF

BULB