Device capable of preventing rotation in connection between ship shafting and front screw shaft and installing method thereof

Abstract

A device capable of preventing rotation in connection between ship shafting and a front screw shaft comprises a limit plate, an adjusting bolt arranged at one end of the limit plate, a hook and a bolt arranged at the other end of the limit plate. A sleeve is sleeved on the outside of one end of the bolt, the inside of the bolt is connected with a screw, and a washer is arranged at the other end of the screw. An installing method of the device is further provided. The device can prevent damage to the screw shaft and relevant accessories, and the damage is caused by abnormal rotation caused under the condition that a propeller of the screw shaft is accidentally subjected to external force and has the advantages of being convenient to operate, capable of being used repeatedly and permanently, free of maintaining, low in manufacture cost and low in use cost.

Description

technical field [0001] The invention relates to ship shafting construction, in particular to a ship shafting connection front stern shaft anti-rotation device and an installation method thereof. Background technique [0002] After the ship is launched, during the shafting alignment process before the shafting connection, the upper end of the bow flange of the stern shaft is only subjected to a vertical downward force of 5 tons. When the impact of the external water flow is large (such as the mooring test of the main engine of an adjacent berth ship), the propeller will be subjected to an impact force and torsion force, which will cause the downward pressure oil pump at the bow of the stern shaft to slide down, causing the bow of the stern shaft to rise instantly , causing a large impact on the top of the stern tube bearing. At the same time, the stern shaft will rotate eccentrically and irregularly, which will cause damage to the stern shaft, stern tube bearing and the front...

AI Technical Summary

Problems solved by technology

When the impact of the external water flow is large (such as the mooring test of the main engine of an adjacent berth ship), the propeller will be subjected to an impact force and torsion force, which will cause the downward pressure oil pump at the bow of the stern shaft to slide down, causing the bow of the stern shaft to rise instantly , causing a large impact on the top of the stern tube bearing. At the same time, the stern shaft will rotate eccentrically and irregularly, which will cause damage to the stern shaft, stern tube bearing and the front and rear seals of the stern shaft. In addition, if there is water work in the stern area, Accidental rotation of the propeller may cause related casualties

Once such an incident occurs, the consequences will be extremely serious. As far as the shafting is concerned, the ship owner will require docking inspection, which will not only cause huge economic losses, but also greatly delay the construction progress of the ship.

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