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Open tunnel ship type reversing performance enhancement method and device

A tunnel and ship type technology, applied in the direction of ship hull, hull parts, ship construction, etc., can solve the problems that the tunnel cannot be filled with water, low propulsion efficiency, loss of thrust, etc. Effect

Pending Publication Date: 2019-04-19
CSSC XIJIANG SHIPBUILDING
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AI Technical Summary

Problems solved by technology

But when reversing, the propeller drains and exhausts forward. Since the area behind the propeller is the development area, the air is constantly replenished and a vacuum cannot be formed, so the tunnel cannot be filled with water. Part of the propeller is not soaked in water, and the thrust is lost. Low propulsion efficiency

Method used

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  • Open tunnel ship type reversing performance enhancement method and device
  • Open tunnel ship type reversing performance enhancement method and device
  • Open tunnel ship type reversing performance enhancement method and device

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Embodiment Construction

[0023] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

[0024] see Figure 1-5 , a ship-type reversing performance enhancement method for an open tunnel to improve the reversing propulsion efficiency of an open tunnel. A closed space is formed at the tail, so that the air above the tunnel is evacuated to form a vacuum, and then the water is sucked in to fill it up, so that the propeller is completely submerged in the water when the car is reversing; but this device must be opened when the car is moving forward, so as not to affect the drainage of the tunnel backward. Based on the above needs, a reversible baffle is installed behind the tail seal. When driving forward, use the backward water thrust to push it away to ensure the shape of an open tunnel; when reversing, rely on the resistance of the water to press the baffle against the tail seal. above, forming a closed space similar to a closed tunnel. ...

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Abstract

The invention discloses an open tunnel ship type reversing performance enhancement method and device. In order to form a tail-closed structure similar to a closed tunnel at the tail of a ship body, one device needs to be added, a closed space can be formed at the tail of an open tunnel during reversing, air in the upper portion of the tunnel is evacuated to form vacuum, the closed space sucks water and is filled with the water, and all screw propellers are immersed in the water during reversing. The device needs to be opened during advancing, and backward drainage of the tunnel cannot be affected. The requirements are combined, a turnover baffle plate is additionally mounted at the back of a tail sealing plate and pushed open by backward water flow during advancing, and the shape of the open tunnel is ensured. The reversing performance enhancement device with simple structure, high efficiency and low cost is provided for shallow draught ships constrained, controllability of open tunnelships can be effectively improved, and the low-priced device for efficiently enhancing ship reversing performances can be provided for future similar ships by project implementation.

Description

technical field [0001] The invention relates to the field of tunnel ship type design, in particular to a method for enhancing the reversing performance of an open tunnel ship type and a device thereof. Background technique [0002] The waters of the Lijiang River are beautiful and the water tourism industry is developed. However, due to draft restrictions, in order to ensure the efficiency of the propeller, the design of the Lijiang tourist boat adopts the stern tunnel ship shape. At the same time, the propulsion efficiency of the front car is good, but the reverse performance is poor. [0003] Tunnels are divided into open tunnels and closed tunnels according to their longitudinal section shape. [0004] The resistance of the open tunnel is small, and the propulsion efficiency of the forward vehicle is higher than that of the closed tunnel, but the reverse performance is poor. The closed tunnel has high resistance, and the efficiency is lower than that of the open tunnel ...

Claims

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Application Information

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IPC IPC(8): B63B1/08B63B3/40
CPCB63B1/08B63B3/40
Inventor 杨凯卢纪文
Owner CSSC XIJIANG SHIPBUILDING
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