Large ship rudderstock assembly dismounting tool and dismounting method thereof

Abstract

The invention discloses a large ship rudderstock assembly dismounting tool and a dismounting method thereof, and relates to the technical field of ship repair. The tool comprises a steering engine room, a stern, an upper rudder bearing, a rudderstock, a lower rudder bearing, a dull rudder and a rudder blade, the stern is arranged at the tail of the steering engine room, and one end of the rudderstock is installed on the steering engine room through the upper rudder bearing and the other end of the rudderstock is installed on the dull rudder through the lower rudder bearing; the rudder blade is installed on the dull rudder, and a hoisting process hole is formed in the position, located above the rudderstock, of a stern deck of the steering engine room. A maintenance process hole is formed in the position, below the lower rudder bearing, of the rudder blade. The upper rudder bearing comprises a millstone, a tiller, a plunger rod pin, an upper nut, a plunger head and a hanging ring. According to the large ship rudderstock assembly dismounting tool and the dismounting method thereof, docking is not needed, dismounting work of a large ship rudderstock can be completed in a floating state, the docking period cost is greatly saved, losses of manpower and material resources are reduced, the construction efficiency can be obviously improved, and the maintenance period is shortened.

Description

technical field [0001] The invention relates to the technical field of ship repair, in particular to a large ship rudder stock assembly disassembly tool and a disassembly method thereof. Background technique [0002] If the rudder blade is accidentally subjected to extreme impact, it is prone to damage to the steering gear, distortion of the rudder stock, damage to the bearing seat or bearing of the grinding disc, and deviation of the centerline of the rudder system. The rudder stock needs to be dismantled for thorough inspection and maintenance. According to the conventional repair method, the dismantling of the rudder stock of large ships must be carried out in the dock. Although this can ensure the safety of construction, the docking period of the shipyard needs to be scheduled every time the ship enters and leaves the dock. In addition, it takes a lot of time and manpower in the process of pier layout, manpower scheduling, tugboat coordination, and scaffolding erection, ...

AI Technical Summary

Problems solved by technology

[0002] If the rudder blade is accidentally subjected to extreme impacts when the ship is traveling in rough seas or rough waterways, problems such as damage to the steering gear, twisting of the rudder stock, damage to the bearing seat or bearing of the grinding disc, and deviation of the center line of the rudder system are likely to occur. The rudder stock needs to be disassembled for thorough inspection and maintenance. According to the conventional repair method, the disassembly of the rudder stock of large ships must be carried out in the dock. Although this can ensure the safety of the construction, each time the ship enters and exits the dock, it is necessary to book the docking period of the shipyard. It also consumes a lot of time and manpower in the pier layout, manpower scheduling, tugboat coordination, scaffolding erection and other processes, resulting in high costs, and the long docking period is bound to bring a huge impact on the originally busy production. Therefore, it is necessary to master how to disassemble the rudder stock of large ships in a floating state

[0003] The fixed rudder blades in the dock mainly rely on large hoists and large lugs, but this method is not suitable at sea. First, the large hoists are exposed to the sea for a long time, which is easy to corrode and damage, which increases maintenance costs. The blade is easy to swing and shift, and it is difficult to fix the rudder blade with a gourd chain. In the existing method of dismantling the rudder stock in the dock, it is mainly used to heat the tiller hub, use a top wire to pull it, and use 4 sets of oil jacks under the tiller. The joint push method has the following disadvantages:

[0004] 1. Multiple sets of tooling nuts are welded on the upper end of the tiller. The welded seam has a small stress section, low safety factor, and is not strong enough. When the force is uneven or too large, it is easy to break and loosen, and the tooling will be disassembled by the top, causing safety accidents risks of;

[0005] 2. Four sets of oil jacks are used to push the lower surface of the tiller, and the number of oil jacks is large, so there is a risk of uneven force and excessive jacking force, which may easily lead to deformation of the steering gear base;

[0006] 3. The overall heating of the tiller hub has disadvantages such as long heating time, high labor intensity, and poor construction environment

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