Propulsion device of catamaran

Abstract

The catamaran propelling device comprises a catamaran body (1), paddle propelling devices (2), a deck (3), paddles (4), gears (5), chains (6), rollers (7), inner chain plates (8), sleeves (9), pin shafts (10), outer chain plates (11) with paddles and outer chain plates (12) with paddles. The paddles are driven through rotation of the chain, and the catamaran is pushed to move through interaction of the paddles and water. Water flow between the two ship bodies can be adjusted and rectified, the flowing state of the water flow is changed, and resistance received by the catamaran is reduced. Due to the action characteristics of the paddles, cavitation bubbles can be reduced, the propulsion efficiency is improved, and the navigation stability and the operation performance of the ship are improved.

Description

Technical Field

[0001] The invention relates to the technical field of improving the propulsion performance of a catamaran, and in particular to a catamaran propulsion device. Background Art

[0002] As a special type of ship, catamarans have been widely used in many fields such as water transportation, marine scientific research, leisure and entertainment due to their unique structural design. They are composed of two hulls connected in parallel. Compared with monohulls, catamarans have larger deck areas, good stability and higher speed potential, and can maintain a relatively stable navigation state even in complex sea conditions.

[0003] However, despite the above advantages of catamarans, there are still some urgent problems to be solved in terms of propulsion performance. On the one hand, during the navigation of a catamaran, a complex flow field will be formed between the two hulls, generating significant resistance. This interference will cause uneven distribution of water flow around the hull, increase the resistance of the hull forward, and thus reduce propulsion efficiency. Especially when sailing at high speeds, the increase in interference resistance is more obvious, requiring the ship to consume more energy to maintain speed, which not only increases operating costs, but also limits the speed increase of the catamaran.

[0004] On the other hand, the existing catamaran propulsion device also has certain limitations in design. In the application of catamarans, the traditional propeller propulsion method has a complex working environment for the propeller due to the influence of the hull structure, and is prone to cavitation and uneven wake problems. Cavitation will cause the propeller efficiency to decrease, aggravate the wear of the propeller, and shorten its service life; while uneven wake will cause the propeller thrust to fluctuate, affecting the navigation stability and maneuverability of the ship.

[0005] In addition, with the increasingly stringent environmental protection requirements, higher requirements have been put forward for the energy conservation and emission reduction of catamarans. How to improve propulsion efficiency, reduce energy consumption and pollutant emissions without reducing ship performance has become a key issue in the development of catamaran technology.

[0006] At present, although there have been some research and improvement measures aimed at improving the propulsion performance of catamarans, such as optimizing the hull lines, these methods still have certain limitations in practical applications and cannot fully meet the propulsion performance requirements of catamarans under different working conditions. Summary of the invention

[0007] In view of the above-mentioned shortcomings, the present invention proposes a catamaran propulsion device. The device is characterized in that it comprises a hull (1), a propeller propulsion device (2), a deck (3), a propeller blade (4), a gear (5), a chain (6), a roller (7), an inner chain plate (8), a sleeve (9), a pin (10), an outer chain plate (11) with a propeller blade, and an outer chain plate (12). The assembly relationship of the propeller propulsion device (2) is as follows: the propeller propulsion device (2) is installed between the two hulls (1) and below the deck (3). In the propulsion device, the chain (6) is installed on the gear (5), the sleeve (9) is connected to the inner chain plate (8) by an interference fit, the pin (10) is connected to the outer chain plate (11) with a propeller blade and the outer chain plate (12) by an interference fit, and the sleeve (9) is connected to the roller (7) and the pin (10) by a clearance fit. The outer link plate (11) with the blades is connected to the blades (4) by bolts, and the assembly of the catamaran propulsion device is completed through the above assembly relationship.

[0008] Experiments have shown that the arrangement of the blades between the two boats improves the propulsion efficiency of the catamaran through the direct interaction between the blades and water. The resistance generated during the propulsion process is effectively reduced, the structure is simple, and maintenance is convenient. The present invention can provide a new design idea and method for the design of marine propellers.

[0009] Compared with the existing propulsion device, the present invention provides a propulsion device with a blade between the two ships, which has the following beneficial effects: (1) The propulsion efficiency of the catamaran is improved through the direct interaction between the propeller blades and water.

[0010] (2) Reduce the generation of cavitation. Unlike traditional propeller propulsion, the interaction between the blades and water is relatively gentle, which can reduce the generation of cavitation, thereby reducing energy loss and improving efficiency.

[0011] (3) The resistance of the catamaran is reduced. The setting of the propeller blades can regulate and rectify the water flow between the two hulls to a certain extent, change the flow state of the water flow, and make the water flow more smoothly through the area between the two hulls, thereby reducing this part of the additional resistance and improving the propulsion efficiency of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. The drawings described below are an embodiment of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0013] Figure 1 A schematic structural diagram of a catamaran provided in an embodiment of the present invention.

[0014] Figure 2 A schematic diagram of the structure of a propulsion device provided in an embodiment of the present invention.

[0015] Figure 3 A schematic diagram of a chain structure provided in an embodiment of the present invention.

[0016] Figure 4 A schematic diagram of a blade structure provided in an embodiment of the present invention.

[0017] Description of reference numerals: 1-hull, 2-propeller propulsion device, 3-deck, 4-propeller, 5-gear, 6-chain, 7-roller, 8-inner chain plate, 9-sleeve, 10-pin shaft, 11-outer chain plate with propeller, 12-outer chain plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] like Figure 1 As shown, one embodiment of the present invention provides a catamaran propulsion device, in which a chain is installed under the deck between the two ships, and the rotation of the chain drives the rotation of the blades, thereby providing power for the catamaran.

[0020] like Figure 2 As shown, the selection of a chain to drive the rotation of the blades is based on a variety of factors, including the high transmission efficiency, strong load-bearing capacity, and long service life of the chain drive.

[0021] like Figure 3 As shown, the shape of the selected blade conforms to the streamlined design, which is beneficial to reduce the resistance received when moving in the water. This shape also reduces the possibility of debris adhesion.

[0022] Working principle: A propeller is installed between the two hulls and under the deck to reduce bubble formation and improve the propulsion efficiency of the catamaran. Its working principle is to drive the propeller through the rotation of the chain, and the interaction between the propeller and the water promotes the movement of the catamaran.

[0023] When a catamaran is sailing, a complex flow field will be formed between the two hulls. This interference will cause uneven distribution of water flow around the hull, increase the resistance of the hull, and thus reduce the propulsion efficiency. Especially when sailing at high speed, the increase in resistance is more obvious, requiring the ship to consume more energy to maintain the speed. In the application of traditional propeller propulsion in catamarans, due to the influence of the hull structure, the working environment of the propeller is relatively complex, and cavitation and uneven wake problems are prone to occur. Uneven wake will cause the propeller thrust to fluctuate, affecting the navigation stability and maneuverability of the ship.

[0024] The propeller propulsion device can improve the above-mentioned problems. The action mode of the propeller blades on the water is relatively gentle, which can reduce the generation of cavitation. The setting of the propeller blades can regulate and rectify the water flow between the two hulls to a certain extent, change the flow state of the water flow, and reduce the resistance of the catamaran.

[0025] In general, the design of the propeller propulsion device can reduce the generation of cavitation, reduce resistance and improve propulsion efficiency.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, the technical solution described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the present invention.

Claims

1. A catamaran propulsion device, comprising a hull (1), a propeller propulsion device (2), a deck (3), a propeller blade (4), a gear (5), a chain (6), a roller (7), an inner chain plate (8), a sleeve (9), a pin (10), an outer chain plate with a propeller blade (11) and an outer chain plate (12); wherein: The assembly relationship of the propeller propulsion device (2) is as follows: the propeller propulsion device (2) is installed between the two hulls (1) and below the deck (3); in the propulsion device, the chain (6) is installed on the gear (5), the sleeve (9) is connected to the inner chain plate (8) by interference fit, the pin (10) is connected to the outer chain plate (11) with the propeller blades and the outer chain plate (12) by interference fit, and the sleeve (9) is connected to the roller (7) and the pin (10) by clearance fit; the outer chain plate (11) with the propeller blades is connected to the propeller blades (4) by bolts. Through the above assembly relationship, the assembly of the catamaran propulsion device is completed.

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