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A discoloration early warning installation method for ship stern shaft

An installation method and stern shaft technology, which can be applied to ships and other directions, can solve the problems of the stern shaft's dead weight, serious wear, and easy damage to babbitt alloys, and achieve a wide range of applications.

Active Publication Date: 2021-11-02
HAIMEN DADE INTPROP SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The stern tube of a large bulk carrier is usually designed with a single bearing. During the construction stage of installing the stern shaft to the stern tube, the conventional method is to use a manual chain hoist to lift it slowly. Due to the heavy weight of the stern shaft, this method is not only time-consuming, It is laborious, and the stern shaft is easy to move inside the stern tube during the hoist pulling process, which is very easy to damage the Babbitt alloy of the stern tube bearing, as well as the oil pipe of the stern seal arranged on the inner wall, and the temperature probe protection tube. Once damaged, it cannot be found in time. Subsequent construction brought major hidden dangers to quality. The Chinese invention "A Method for Installing Ship Stern Shaft" with application number 201811230644.4 assists the hoisting of the stern shaft by setting a roller frame and a flexible guide device.
[0004] Although the above scheme can guide the stern shaft for hoisting, it is not easy to cause large movement, but it is difficult to control the hoist rope stably during the hoisting process, so it is inevitable that there will be deviation with the guidance, resulting in the stern shaft being hoisted. Although it is possible to enter the stern tube, the wear is serious and cannot be detected in time during the hoisting process. The stern shaft is prone to damage and failure in the later work process, which greatly shortens the working life

Method used

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  • A discoloration early warning installation method for ship stern shaft
  • A discoloration early warning installation method for ship stern shaft
  • A discoloration early warning installation method for ship stern shaft

Examples

Experimental program
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Effect test

Embodiment 1

[0039] see figure 1 and image 3 , a ship stern shaft discoloration early warning installation method, on the basis of the existing technology, by adding an early warning ring, the stern shaft is hoisted to the early warning ring and passed through, and the hoist rope is used to pull the stern shaft along the early warning ring to the ship Move the stern tube forward and observe the discoloration of the warning ring in real time. When the discoloration of the warning ring appears, it means that the stern shaft is shifting to the discolored part. The ring returns to the original color, and continue to pull the stern shaft until the hoisting is completed. When installing the warning ring, ensure that the installation environment has sufficient light to improve the recognition of the color change of the warning ring. The imaging method of the ring is convenient for observing the discoloration of the warning ring.

[0040] see Figure 4, the guide ring 2 plays the role of hoist...

Embodiment 2

[0047] In Embodiment 1, the color-changing ball 1 on the early warning ring only provides the color-changing early warning function, and the trigger lever 14, the support block 5, and the colored magnetic ball 6 are all made of common materials. In this embodiment, the trigger lever 14 and the support The block 5 is made of conductive material, the transparent diaphragm 4 is a transparent conductive film, the support block 5 is electrically connected to a power source, and the hollow deformable hemisphere 12 is filled with electrorheological fluid, which will be connected after the trigger rod 14 contacts the support block 5 The circuit forces the electrorheological fluid in the hollow deformable hemisphere 12 to harden, thereby providing high-strength support. On the one hand, it can protect the color-changing ball 1 from being damaged, and on the other hand, it can also prevent the stern shaft from continuing to deviate. It can not only provide color-changing warning Function...

Embodiment 3

[0051] In Embodiments 1 and 2, the warning rings are all external auxiliary parts to assist the hoisting of the stern shaft. In this embodiment, after the hoisting of the stern shaft is completed, the warning ring can be installed in the stern tube. It can provide color change warning function, so as to improve the stability and precision of the stern shaft when it is working. The stern tube of the ship is modified in advance to reserve the installation position and space for the warning ring.

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Abstract

The invention discloses a ship stern shaft discoloration early warning installation method, which belongs to the technical field of ships. On the basis of the prior art, the stern shaft is hoisted to the early warning ring and passes through the early warning ring. Pull the stern shaft along the warning ring to the stern tube of the ship by pulling the rope, and observe the discoloration of the warning ring in real time. Reversely adjust the attitude of the stern shaft until the warning ring returns to the original color, and continue to pull the stern shaft. Not only can it be adjusted in time to warn of the deviation of the stern shaft, but it also has a certain guiding effect.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a discoloration early warning installation method for a ship stern shaft. Background technique [0002] Ship, the general term for all kinds of ships. Ships are means of transportation that can sail or berth in waters for transportation or operations, and have different technical performances, equipment and structural types according to different requirements for use. A ship is a man-made means of transportation that primarily operates in geographical waters. In addition, civilian ships are generally called ships, military ships are called ships, and small ships are called boats or boats, which are collectively called ships or boats. The interior mainly includes accommodation space, support structure and drainage structure, and has a propulsion system that utilizes external or self-contained energy. The appearance is generally a streamlined envelope that is conducive to overcomi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B73/20
CPCB63B73/20
Inventor 胡海俊
Owner HAIMEN DADE INTPROP SERVICE CO LTD