Propulsion device for catamaran

Abstract

This utility model discloses a propulsion device for a catamaran, including a sleeve-shaped cutter assembly. A propeller is housed inside the sleeve-shaped cutter assembly, and a helical cutter assembly is spirally embedded outside the propeller. The helical cutter assembly and its tail are fixedly installed by bolts. A flow guide is also included, installed at the tail of the helical cutter assembly. The sleeve-shaped cutter assembly includes a sleeve-shaped cutter holder, with blades fixedly installed on its outer periphery. The propeller includes a drive rod that winds and tightens a rope around the sleeve-shaped cutter assembly and the helical cutter assembly, using the winding force to press against them and cut the rope. When no rope is wound, the propeller drives the helical cutter assembly to rotate, and the helical structure of the helical cutter assembly, together with the propeller, propels the water flow. Compared to conventional propellers with cutting structures, this reduces working resistance and improves practicality.

Description

Technical Field

[0001] This utility model belongs to the field of marine engineering technology, and in particular relates to a propulsion device for catamarans. Background Technology

[0002] A ship propeller is a propulsion device located at the stern of a ship and mainly consists of blades and a hub. It rotates to create a fluid pressure difference between the pressure surface and suction surface of the blades, which accelerates the flowing fluid. The reaction force of the fluid momentum change propels the ship forward. It belongs to the fields of oceanography and shipbuilding engineering, mechanical engineering, and fluid mechanics. Its design and manufacturing must take into account structural strength, material properties, and propulsion efficiency. It is a key component of the ship's power system.

[0003] Because underwater fishing nets and other fibrous objects are common, propellers are easily entangled. Some propellers have a cutting structure, and the blades of the cutting structure are perpendicular to the water flow. When the cutting structure is running idle, the water resistance of the blade surface is particularly high, which causes the conventional propellers with cutting structures to have relatively high water resistance.

[0004] To address this problem, we propose a propulsion system for catamarans. Utility Model Content

[0005] The purpose of this invention is to solve the problem of high water resistance in conventional propellers with cut-off structures, and to propose a propulsion device for catamarans.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A propulsion device for a catamaran includes a sleeve-shaped cutterhead assembly. A propeller is housed inside the sleeve-shaped cutterhead assembly, and a helical cutterhead assembly is spirally embedded outside the propeller. The helical cutterhead assembly and its tail are fixed together by bolts. When the propeller rotates and winds a rope around it, the rope tightens and presses against the sleeve-shaped cutterhead assembly and the helical cutterhead assembly, using the winding force to cut the rope. When no rope is wound around it, the propeller drives the helical cutterhead assembly to rotate, and the helical structure of the helical cutterhead assembly, together with the propeller, propels the water flow. Compared to conventional propellers with cutting structures, this reduces operating resistance and improves practicality.

[0008] Preferably, it also includes a flow deflector, which is installed at the tail of the helical blade assembly. The flow deflector, positioned at the tail of the propeller, guides the water flow and reduces turbulence damage.

[0009] Preferably, the sleeve-shaped cutter assembly includes a sleeve-shaped cutter holder, and blades are fixedly mounted on the outer periphery of the sleeve-shaped cutter holder. By arranging the blades in the direction of water flow, the resistance of the blades to the water flow is reduced.

[0010] Preferably, the propeller includes a drive rod, a rotor is fixedly connected to the tail of the drive rod, blades are fixedly connected to the outside of the rotor, and a sleeve-shaped cutter holder is fitted over the drive rod. The drive rod is fixedly connected to the output shaft of the hull. When the output shaft of the hull drives the drive rod to rotate, the drive rod drives the rotor to rotate, and the rotor drives the blades to revolve.

[0011] Preferably, the spiral cutter assembly includes a mounting plate, a spiral strip fixedly connected to the outer periphery of the mounting plate, and spiral blades rotatably connected to the outside of the spiral strip. The spiral strip is spirally embedded in the rotating base, and the front of the mounting plate contacts the rear of the rotating base. An external bolt passes through the thread of the mounting plate and is installed at the tail of the rotating base. The screws between the rotating base and the mounting plate are removed, and then the mounting plate, spiral strip, and spiral blades are unscrewed. A new mounting plate, spiral strip, and spiral blades are installed, and the external bolt is tightened to secure them, facilitating the replacement of the spiral cutter assembly.

[0012] Preferably, the flow guide includes a threaded ring, the tail of which is fixedly connected to a cover body. The threaded ring is threadedly installed inside the mounting plate, and the cover body contacts the mounting plate. The cover body blocks the tail of the mounting plate to prevent turbulence.

[0013] In summary, the technical effects and advantages of this utility model are as follows:

[0014] 1. When the propeller rotates and winds the rope, the rope tightens and presses against the sleeve-shaped cutter group and the spiral cutter group. The winding force presses against the sleeve-shaped cutter group and the spiral cutter group, cutting the rope through them. When there is no rope winding, the propeller drives the spiral cutter group to rotate. The spiral structure of the spiral cutter group, together with the propeller, propels the water flow. Compared with conventional propellers with cutting structures, this reduces working resistance and improves practicality.

[0015] 2. Remove the screws between the rotary base and the mounting plate, then unscrew the mounting plate, spiral strip, and spiral blade. Replace them with new mounting plate, spiral strip, and spiral blade, and then tighten the additional bolts to secure them for easy replacement of the spiral blade assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the sleeve-shaped knife assembly structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the propeller structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the spiral blade assembly structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the air guide cover structure of this utility model.

[0021] In the diagram: 2. Sleeve-shaped cutter assembly; 3. Propeller; 4. Helical cutter assembly; 5. Shield; 21. Sleeve-shaped cutter holder; 22. Blade; 31. Drive rod; 32. Rotary seat; 33. Blade; 41. Mounting plate; 42. Spiral strip; 43. Helical blade; 51. Threaded ring; 52. Cover. Detailed Implementation

[0022] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments.

[0023] like Figure 1 As shown, a propulsion device for a catamaran includes a sleeve-shaped cutter assembly 2, with a propeller 3 inside the sleeve-shaped cutter assembly 2. A helical cutter assembly 4 is helically embedded outside the propeller 3, and the helical cutter assembly 4 is fixedly installed to the tail end of the helical cutter assembly 4 by bolts. The sleeve-shaped cutter assembly 2 is fixed to the hull, and the propeller 3 is fixedly connected to the output shaft of the hull.

[0024] like Figure 1 As shown, it also includes a flow guide 5, which is installed at the tail of the spiral cutter assembly 4. The flow guide 5 is used to block the water flow at the tail of the propeller 3.

[0025] like Figure 1 and 2 As shown, the sleeve-shaped cutter assembly 2 includes a sleeve-shaped cutter holder 21, and a blade 22 is fixedly mounted on the outer periphery of the sleeve-shaped cutter holder 21. By arranging the blade 22 in the direction of water flow, the resistance of the blade 22 to the water flow is reduced.

[0026] like Figure 1 and 3 As shown, the propeller 3 includes a drive rod 31, with a rotating base 32 fixedly connected to the tail of the drive rod 31. Blades 33 are fixedly connected to the outside of the rotating base 32, and a sleeve-shaped cutter holder 21 is fitted over the drive rod 31. The drive rod 31 is fixedly connected to the output shaft of the hull. When the output shaft of the hull drives the drive rod 31 to rotate, the drive rod 31 drives the rotating base 32 to rotate, and the rotating base 32 drives the blades 33 to revolve.

[0027] like Figure 1 and 4As shown, the spiral blade assembly 4 includes a mounting plate 41. A spiral strip 42 is fixedly connected to the outer periphery of the mounting plate 41, and a spiral blade 43 is rotatably connected to the outside of the spiral strip 42. The spiral strip 42 is spirally embedded in the rotating base 32. The front of the mounting plate 41 contacts the rear of the rotating base 32, and an external bolt passes through the mounting plate 41 and is threaded onto the tail of the rotating base 32. Remove the screws between the rotating base 32 and the mounting plate 41, then unscrew the mounting plate 41, spiral strip 42, and spiral blade 43, replace them with a new mounting plate 41, spiral strip 42, and spiral blade 43, and then tighten the external bolt to secure them.

[0028] like Figure 1 and 5 As shown, the flow guide shroud 5 includes a threaded ring 51, and a cover 52 is fixedly connected to the tail of the threaded ring 51. The threaded ring 51 is threadedly installed inside the mounting plate 41, and the cover 52 is in contact with the mounting plate 41. The cover 52 is used to block the tail of the mounting plate 41 to prevent turbulence.

[0029] Working principle: When the propeller 3 rotates and winds the rope, the rope is tightened and pressed against the sleeve-shaped cutter group 2 and the spiral cutter group 4. The winding force presses against the sleeve-shaped cutter group 2 and the spiral cutter group 4, cutting the rope through them. When there is no rope winding, the propeller 3 drives the spiral cutter group 4 to rotate. The spiral structure of the spiral cutter group 4, together with the propeller 3, propels the water flow, reducing the working resistance compared to conventional propellers with cutting structures.

[0030] The above description is only a preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed by the utility model, based on the technical solution and the utility model concept, should be included within the protection scope of the utility model.

[0031] The description briefly mentions the application direction of the utility model in relation to existing technologies known to those skilled in the art without modification, and combines them with the utility model to form a complete technology; it avoids excessive popularization of technologies known to those skilled in the art, in order to help those skilled in the art quickly understand the main content of the utility model.

Claims

1. A propulsion device for a catamaran, characterized in that: The device includes a sleeve-shaped blade assembly (2), inside which is provided a propeller (3), and a spiral blade assembly (4) is spirally embedded on the outside of the propeller (3). The spiral blade assembly (4) and the tail of the spiral blade assembly (4) are fixedly installed by bolts.

2. The propulsion device for a catamaran according to claim 1, characterized in that: It also includes a flow guide (5), which is installed at the tail of the spiral blade assembly (4).

3. A propulsion device for a catamaran according to claim 2, characterized in that: The sleeve-shaped knife assembly (2) includes a sleeve-shaped knife holder (21), and a blade (22) is fixedly installed on the outer periphery of the sleeve-shaped knife holder (21).

4. A propulsion device for a catamaran according to claim 3, characterized in that: The propeller (3) includes a transmission rod (31), a rotating seat (32) is fixedly connected to the tail of the transmission rod (31), a blade (33) is fixedly connected to the outside of the rotating seat (32), and the sleeve-shaped blade holder (21) is sleeved on the outside of the transmission rod (31).

5. A propulsion device for a catamaran according to claim 4, characterized in that: The spiral blade assembly (4) includes a mounting plate (41), a spiral strip (42) is fixedly connected to the outer periphery of the mounting plate (41), a spiral blade (43) is rotatably connected to the outside of the spiral strip (42), the spiral strip (42) is spirally embedded in the rotating base (32), the front of the mounting plate (41) contacts the rear of the rotating base (32), and an external bolt passes through the mounting plate (41) and is threaded onto the tail of the rotating base (32).

6. A propulsion device for a catamaran according to claim 5, characterized in that: The flow guide (5) includes a threaded ring (51), and a cover (52) is fixedly connected to the tail of the threaded ring (51). The threaded ring (51) is threadedly installed inside the mounting plate (41), and the cover (52) is in contact with the mounting plate (41).

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