Development of Technical Knowledge and eva‎luation of Challenging Tail Connection in Marine fans

10/20/2017 12:00:00 AM

Providing a method to reduce damage and maintenance costs during the installation of the blade into the propeller hub as well as the hub to the shaft has always been a challenging issue among designers. Today, marine designers are looking for increasing the efficiency of propellers by inventing new ways to replace or repair damaged blades of marine propellers in the least time and at the lowest cost. In most marine propellers, the blades are connected to the hub with bolt or weld joints, and their replacement requires high time and cost. The main purpose of this paper is to design and construct a sea hub that, if used, blades are mounted directly on the hub without any bolt or weld connections, and in the event of damage to each one, the damaged blade can be replaced at a very short time and the lowest cost, and separately from other blades. Dovetail joint is one of the best connections that have been used in many industries, especially aerospace and marine industries, in recent years. In the current research, a product called "hydraulic hub" has been introduced that has been developed using the mechanical design process. The hydraulic hub has an oblique dovetail slots which are opened by applying hydraulic pressure and closing slowly after inserting of the blades and removing the hydraulic pressure from it. In this way, the blades are firmly fixed on the hub with the help of a friction force. The results of the hydraulic hub prototype test show that the mechanism used in this product is a desirable mechanism for use in marine propellers and reduces the costs of overhaul.

فشار هيدروليكي , پروانه دريايي , شيار دم چلچله اي , هاب هيدروليكي

Hydraulic Hub , Challenging Tail , Marine Fans , Hydraulic Pressure

Abdolkarim Niyazi

Dr. Norooz Mohammad Noori