Propulsion device of catamaran

Abstract

The utility model discloses a catamaran propelling device which comprises a catamaran body (1), a paddle propelling device (2), a deck (3), paddles (4), a gear (5), a chain (6), a roller (7), an inner chain plate (8), a sleeve (9), a pin shaft (10), an outer chain plate (11) with paddles and an outer chain plate (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 utility model relates to improve the technical field of catamaran propulsion performance, especially in kind of catamaran propulsion device. BACKGROUND

[0002] As a special ship type, catamaran has been widely used in many fields such as water transportation, ocean exploration, leisure and entertainment due to its unique structural design. Compared with monohull ship, catamaran has larger deck area, good stability and higher potential speed, and can maintain relatively stable sailing state in complex sea conditions.

[0003] However, although catamaran has the above advantages, there are still some problems to be solved in its propulsion performance. On the one hand, during sailing, complex flow field will be formed between the two hulls of catamaran, resulting in significant resistance. This interference will cause uneven distribution of water flow around the hull, increasing the resistance of the hull advancing, thus reducing the propulsion efficiency. Especially at high speed, the increase of interference resistance is more obvious, so that the ship needs to consume more energy to maintain the speed, which not only increases the operating cost, but also limits the speed improvement of catamaran.

[0004] On the other hand, the existing catamaran propulsion device also has certain limitations in design. Due to the influence of hull structure, the working environment of propeller is relatively complex in the application of catamaran, and the problems of cavitation and uneven wake are easy to occur. Cavitation phenomenon will cause the efficiency of propeller to decrease, aggravate the wear of propeller and shorten its service life; while uneven wake will make the thrust of propeller fluctuate, affecting the sailing stability and maneuvering performance of ship.

[0005] In addition, with the increasing strictness of environmental protection requirements, higher requirements are put forward for energy saving and emission reduction of catamaran. How to improve the propulsion efficiency without reducing the performance of ship, reduce energy consumption and pollutant emission has become the key problem of catamaran technology development.

[0006] At present, although there have been some researches and improvement measures for improving the propulsion performance of catamaran, such as optimizing the hull lines, but these methods still have certain limitations in practical application, and cannot completely meet the requirements of catamaran for propulsion performance under different working conditions. SUMMARY

[0007] In view of the above-mentioned deficiencies, the utility model provides a catamaran propulsion device. Its characterized in be including ship body (1), paddle propulsion device (2), deck (3), paddle (4), gear (5), chain (6), roller (7), inner chain plate (8), sleeve (9), pin shaft (10), the outer chain plate (11) of paddle and outer chain plate (12). Among them, the assembly relationship of paddle propulsion device (2) is as follows, installs paddle propulsion device (2) between two ship bodies (1), the underneath of deck (3). In the propulsion device, chain (6) is installed on gear (5), sleeve (9) and inner chain plate (8) are connected through interference fit, pin shaft (10) and the outer chain plate (11) of paddle and outer chain plate (12) are connected through interference fit, sleeve (9) and roller (7) and pin shaft (10) are connected through clearance fit. The outer chain plate (11) of paddle and paddle (4) are connected through bolt, through the above assembly relationship, the assembly of catamaran propulsion device is completed.

[0008] Through experiment, the setting of paddle between two ships improves the propulsion efficiency of catamaran through the direct action of paddle and water, effectively reduces the resistance generated in the propulsion process, and the structure is simple and convenient to maintain. The utility model provides a new design idea and method for the design of ship propeller.

[0009] Compared with the existing propulsion device, the utility model has the following beneficial effects by setting a paddle propulsion device between two ships:

[0010] (1) through the direct interaction of paddle and water, the propulsion efficiency of catamaran is improved.

[0011] (2) reduce the generation of cavitation, unlike the traditional propeller propulsion, the action mode of paddle and water is relatively mild, which can reduce the generation of cavitation, thereby reducing the energy loss and improving the efficiency.

[0012] (3) reduce the resistance received by catamaran, the setting of paddle can adjust and straighten the water flow between two ship bodies to a certain extent, change the flow state of water flow, so that the water flow passes through the area between two ship bodies more stably, thereby reducing the additional resistance and improving the propulsion efficiency of ship. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below. The drawings in the following description are an embodiment of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor.

[0014] Figure 1The structure schematic diagram of the catamaran is provided for the embodiment of the utility model.

[0015] Figure 2 The structure schematic diagram of the propelling device is provided for the embodiment of the utility model.

[0016] Figure 3 The structure schematic diagram of the chain is provided for the embodiment of the utility model.

[0017] Figure 4 The structure schematic diagram of the paddle is provided for the embodiment of the utility model.

[0018] Mark explanation:

[0019] 1-ship body, 2-paddle propelling device, 3-deck, 4-paddle, 5-gear, 6-chain, 7-roller, 8-inner chain plate, 9-sleeve, 10-pivot, 11-paddle-equipped outer chain plate, 12-outer chain plate. Specific implementation

[0020] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] As Figure 1 shown, an embodiment of the utility model provides a catamaran propelling device, a chain is installed under the deck between the two ships, the rotation of the chain drives the rotation of the paddle, thereby providing power for the catamaran.

[0022] As Figure 2 shown, the rotation of the paddle driven by the chain is based on multiple factors, including high transmission efficiency, strong carrying capacity and long service life of chain transmission.

[0023] As Figure 3 shown, the shape of the selected paddle conforms to the streamline design, which is conducive to reducing the resistance received when moving in water, and this shape also reduces the possibility of debris attachment.

[0024] Working principle: a paddle propelling device is arranged under the deck between the two ship bodies, bubble formation is reduced, and the propelling efficiency of the catamaran is improved. The working principle is that the paddle is driven by the rotation of the chain, and the movement of the catamaran is pushed through the interaction of the paddle and water.

[0025] During the sailing process of the catamaran, a complex flow field is formed between the two hulls. This interference can cause uneven water flow distribution around the hulls, increasing the resistance of the hulls advancing, thereby reducing the propulsion efficiency. Especially at high speed, the increase in resistance is more obvious, so the ship needs to consume more energy to maintain the sailing speed. The traditional propeller propulsion method is applied in the catamaran, and due to the influence of the hull structure, the working environment of the propeller is relatively complex, and the cavitation phenomenon and uneven wake problem are easy to occur. Uneven wake will cause the thrust of the propeller to fluctuate, affecting the sailing stability and maneuvering performance of the ship.

[0026] The paddle propulsion device can improve the above-mentioned problems. The action mode of the paddle with water is relatively mild, which can reduce the generation of cavitation. The paddle can adjust and straighten the water flow between the two hulls to a certain extent, change the flow state of the water flow, and reduce the resistance received by the catamaran.

[0027] In general, the design of the paddle propulsion device can reduce the generation of cavitation, reduce resistance, and improve propulsion efficiency.

[0028] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, the technical solutions described in the foregoing examples can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements will not cause the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A catamaran propulsion device comprising a hull (1), a paddle propulsion device (2), a deck (3), a paddle (4), a gear (5), a chain (6), a roller (7), an inner link plate (8), a sleeve (9), a pin (10), an outer link plate with paddle (11) and an outer link plate (12); wherein, The assembly relationship of the paddle propulsion device (2) is as follows: the paddle propulsion device (2) is installed between the two hulls (1) and under the deck (3); in the propulsion device, the chain (6) is installed on the gear (5), the sleeve (9) is connected with the inner chain plate (8) through interference fit, the pin shaft (10) is connected with the outer chain plate (11) and the outer chain plate (12) with paddles through interference fit, the sleeve (9) is connected with the roller (7) and the pin shaft (10) through clearance fit; the outer chain plate (11) with paddles is connected with the paddle (4) through bolts, and the assembly of the double-hull propulsion device is completed through the above assembly relationship.

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