CPP shafting hydraulic coupling dismounting method

Abstract

The invention relates to a CPP shafting hydraulic coupling dismounting method. The method is characterized in by comprising the following process steps that firstly, an outer sleeve is released; secondly, an inner sleeve is released. The method has the advantages of resolving the dismounting problem when a hydraulic coupling has faults, and being high in dismounting efficiency.

Description

technical field [0001] The invention relates to a method for dismantling a CPP shafting hydraulic corbel, which belongs to the technical field of ships. Background technique [0002] Controllable pitch propeller (CPP), by changing the relative position of the blade and the propeller hub, the ship can move forward and backward when the propeller is rotating forward. Adopting the device can improve the maneuverability of the ship, and is widely used in ships with multiple working conditions. Yet work experience for many years has summed up that there is bigger drawback in this device. [0003] see Figure 9 , the OD shaft (short axis) 1.1 and the tail shaft 1.2 are connected by a coupling 2, and the coupling 2 includes an inner sleeve 2.1 (the wall thickness of the inner sleeve gradually decreases from front to back), and an outer sleeve 2.2 (the thickness of the outer sleeve decreases from front to back). gradually become larger) and nut 2.3, the inner sleeve is placed outs...

AI Technical Summary

Problems solved by technology

Theoretically speaking, this set of device is more time-saving and convenient than the disassembly and assembly of the conventional shafting system. When the corbelline is intact, it only needs to inject hydraulic oil from the outside of the outer casing to the gap between the outer casing and the inner casing through the pump pressure of the oil pump to establish the inner shaft. Expansion pressure, eject the jacket and then disassemble the shafting, but in fact, due to the deformation of the shafting, oil leakage, or loss of metal elasticity due to the increase in the number of disassembly, the difficulty of disassembly or installation will become greater

Some ships are unable to disassemble Kobilin, which affects the schedule of the ship, and the shipowner can only give up the project

However, if the shafting oil seal is not replaced in time, the ship will violate the relevant maritime regulations after oil leakage; some ships cannot recover the device due to oil leakage during installation, and repeated attempts to make tooling will also seriously affect the shipping schedule; Billing is seriously damaged and can only be scrapped and replaced with a new one

However, the ordering time is too long, which also seriously affects the shipping schedule.

In recent years, there have been many ships in similar cases. These ships have encountered various difficulties during the dismantling process of Kobelin, which has a great impact on the shipping schedule.

Due to various reasons such as different ship types, different engine room layouts, narrow locations, no stress points, and different difficulties encountered, it is impossible to compile detailed process standards

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