Blade separation pitch fine-tuning four-blade propeller
A propeller and blade technology, applied in the field of blade-separated four-blade propellers, can solve the problems of high operation, storage and transportation costs, high cost of the whole set of equipment, large volume, etc., so as to reduce manufacturing, improve environmental adaptability and economy. Effect
Active Publication Date: 2015-10-28
SHANGHAI MARINE EQUIP RES INST
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Problems solved by technology
Large fixed-pitch propellers are difficult to manufacture due to the integrated design of their blades and hubs, and they are heavy, bulky, and costly to operate and store. The problem of high equipment cost
Method used
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] Such as Figure 1 to Figure 4 As shown, the four-blade propeller of the present invention with separated pitch fine-tuning includes a hollow hub body 1, four blades 2, and a fastening device 3 for fixing the blades. Each set of fastening devices 3 includes a double-ended screw rod 3a, a washer 3b installed on the double-ended screw rod 3a, a large nut 3c, and several jackbolts 3d.
[0019] The hollow hub body 1 is provided with four blade installation platforms 1c, and each blade 2 is connected to the blade installation platform 1c of the hollow hub body 1 through several sets of fastening devices 3, and the blades 2 and the blades rotate There is a blade pitch angle β between the axes L, and one end of the double-ended screw 3a passes through the through hole on the blade installation platform 1c to connect with the threaded hole 2bc in the cir...
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The invention relates to a four-blade propeller with separated blades and the pitch capable of being adjusted finely. The four-blade propeller with the separated blades and the pitch capable of being adjusted finely comprises a hollow propeller hub body, the four blades and a fastening device, wherein the blades are connected to a blade installing platform of the hollow propeller hub body through the fastening device, a blade pitch angle is formed between each blade and the spin axis of each blade, the fastening device comprises a double-thread screw, a gasket, a large nut and pushing bolts, one end of the double-thread screw penetrates through a through hole formed in the blade installing platform to be connected with a threaded hole in a circular blade flange arranged at the rear end of each blade, the through hole is a kidney-shaped through hole in the circumferential direction, the other end of the double-thread screw penetrates out of an inner side installing face of the blade installing platform, and then is fixed through the large nut in a screwed mode, the gasket is arranged between the large nut and the inner side installing face, axial threaded through holes are evenly distributed in the large nut, the pushing bolts are screwed into the axial threaded through holes, the pushing bolts extend from the threaded through holes of the large nut to the gasket to tightly push the gasket to the inner side installing face of the hollow propeller hub body, and the double-thread screw is pulled to fasten the blades and the hollow propeller hub body together.
Description
technical field [0001] The invention relates to a four-blade propeller propulsed by ship power, in particular to a blade-separated four-blade propeller. Background technique [0002] At present, the propellers of ships using integrated all-electric power systems usually use traditional fixed-pitch propeller devices, but fixed-pitch propeller devices have poor propeller matching and maintainability, and they cannot adjust the pitch angle. Changes in hull resistance will reduce propeller efficiency, making it difficult to meet the requirements of ship speed and propulsion efficiency; if a controllable pitch propeller device is used, it can meet the requirements of ship power system speed and propulsion efficiency. Similar to the control performance of the controllable pitch propeller device, if the controllable pitch propeller device is used, a whole set of electro-hydraulic control system will be added, which greatly reduces the reliability of the whole set of propulsion devi...
Claims
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IPC IPC(8): B63H3/00B63H1/20
Inventor 胡举喜易小冬杨文凯
Owner SHANGHAI MARINE EQUIP RES INST