Guide pipe type ship propeller driven by motor

Abstract

The invention relates to a high-efficiency motor-driven guide pipe type ship propeller which comprises a driving module, a supporting rotation module and a water power module. The driving module mainly comprises an upper gearbox module and a motor driving module; the supporting and rotating module mainly comprises a rotating module and a mounting module; the water power module mainly comprises a flow guide cover, a front fixed flow guide blade, a rotating blade module, a rear fixed flow guide blade, a lower gearbox module, a bottom fin and a connecting rudder plate. The invention provides a solution of a motor-driven ducted ship propeller, a propeller with a higher rotating speed is applied through an innovative hydrodynamic design, and a motor with a higher rotating speed is applied through an innovative gear transmission design, so that the whole propeller device achieves higher power density. And meanwhile, the front fixed guide vane, the guide cover and the rear fixed guide vane are arranged around the rotating part of the propeller and are not directly exposed outside, so that the aim of protecting underwater organisms is fulfilled.

Description

Technical Field

[0001] The present invention relates to the field of ships and oceans, and ship propeller technology. Background Art

[0002] To maintain a constant speed, ships need a propulsion system to continuously provide power. A propeller is the device that provides the hydrodynamics for navigation. Existing propellers include podded propellers, azimuth propellers, and rim-type propellers. These systems are bulky, heavy, and have relatively low power density per unit weight or volume, limiting their use in some applications. Furthermore, the rotating components of these propellers are largely exposed, making them unfriendly to underwater life, particularly fish. Summary of the Invention

[0003] This invention addresses the challenges of existing marine propulsion technology by providing a motor-driven, ducted marine propulsion solution. This invention utilizes a motor as the power source, transmitting torque to the propeller through upper and lower gearboxes, driving the propeller's rotation. The interaction between the duct and fixed blades simultaneously creates a propulsion device with relatively high power density. Furthermore, the fixed blades provide protection, minimizing exposure of the rotating propeller portion, making it more accessible to underwater life, particularly fish.

[0004] The specific technical solution adopted by the present invention is: 1. Through hydrodynamic optimization design, the propeller's rotation speed is increased as much as possible, thereby obtaining a propeller with higher power density; 2. Through the design of the upper gearbox device and the lower gearbox device, a higher speed motor can be selected, thereby reducing the volume and weight of the unit and improving the power density; 3. The rudder plate and the bottom fin are connected to serve as a structural function and balance the force of the propeller during navigation, thus achieving higher navigation stability. 4. The full rotation module is set to make the thruster have better maneuverability; 5. Through the integrated design of the entire device, the motor drive unit and the underwater hydrodynamic unit are combined to form a set of high-efficiency hydrodynamic ship propulsion that integrates electric drive and full rotation.

[0005] The beneficial effects of the present invention are as follows: 1. The drive motor, through the upper and lower gearboxes, allows for flexible design of various reduction ratios, enabling the use of higher-speed motors as the driving power source, thereby increasing the motor's power density. 2. The specially designed shroud, front fixed guide vanes, rotating vanes, and rear fixed guide vanes form a well-designed hydrodynamic module, which maximizes propeller hydrodynamics at relatively high speeds, thereby increasing the power density of the entire propeller assembly. 3. The specially designed shroud, front fixed guide vanes, rotating vanes, and rear fixed guide vanes form a well-designed hydrodynamic module, optimizing the propeller's hydrodynamic performance at high speeds. 4. The fins connect the rudder and bottom fins, serving both structural functions and balancing the forces acting on the propeller during navigation, achieving superior stability. 5. The fully rotating module allows the propeller's underwater portion to rotate at any angle, enhancing maneuverability. 6. The propeller has no exposed rotating parts, making it friendly to aquatic life and preventing potential damage from the propeller's rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] like" Figure 1 "As shown, this figure is a schematic diagram of the propeller structure layout principle. Among them, 1, guide cover, 2, front fixed guide vane, 3, rotating blade module, 4, rear fixed guide vane, 5, lower gearbox module, 6, bottom fin, 7, connecting rudder plate, 8, rotation module, 9, installation module, 10, upper gearbox module, 11, motor drive module, 12, protective cover shell, 13, torque transmission shaft." Figure 2 " is a schematic diagram of the rear axle side view of the propeller," Figure 3 " is a schematic diagram of the thruster's front axle side view," Figure 4 " is a schematic diagram of the front view of the propeller. Furthermore, the propeller device can also be regarded as consisting of three modules: a drive module, a support and rotation module, and a hydrodynamic module. The drive module mainly includes an upper gearbox module (10), an electric motor drive module (11), and a torque transmission shaft (13); the support and rotation module mainly includes a rotation module (8) and an installation module (9); the hydrodynamic module mainly includes a guide cover (1), a front fixed guide blade (2), a rotating blade module (3), a rear fixed guide blade (4), a lower gearbox module (5), a bottom fin (6), and a connecting rudder plate (7).

[0007] The specific implementation is as follows: After the rotating motor converts speed and direction through the upper gearbox module, it is transmitted to the lower gearbox module via a torque transfer shaft, where speed and direction are converted again. This force is then applied to the rotating blades, generating hydrodynamic forces. Simultaneously, water flows through the front fixed guide vanes, the guide shroud, the rotating blades, and the rear fixed guide vanes, generating hydrodynamic forces. This force is transmitted to the vessel structure via the support and slewing module, propelling the vessel. Underwater, the rotating components (rotating blades) of the entire device are completely enclosed by the front fixed guide vanes, the guide shroud, and the rear fixed guide vanes, effectively protecting underwater life from the high-speed rotation of the propeller blades. The drive motor can be a higher-speed motor to achieve higher power density, depending on the device design. The drive module motor can be either horizontal or vertical, simply by adjusting the input and output shafts and associated gears of the upper gearbox module to match the desired speed. The support and slewing module is adapted to the device's design load conditions and adjusted accordingly to the actual installation and use, enabling the device to rotate at any angle along the horizontal axis. The shroud is connected to the supporting slewing module via a connecting rudder. The front fixed guide vanes are fixed to the front of the shroud's incoming flow. The lower gearbox module is secured to the shroud's interior via rear fixed guide vanes. The bottom fin is fixed to the outside of the shroud near the rear. The shroud's length is significantly greater than its diameter. Its outer surface exhibits a smooth, streamlined shape, while its inner surface exhibits a streamlined, shrinking-to-smaller shape (specifically, the inner diameter decreases significantly at the entrance, then gradually increases, then gradually decreases again near the middle, and continues to the shroud's exit), ensuring efficient hydrodynamics. Multiple front fixed guide vanes are designed, appropriately sized for the shroud's inlet diameter, to effectively prevent organisms from entering the shroud. They are also angled to ensure efficient hydrodynamics. Multiple rear fixed guide vanes are designed to meet both efficient hydrodynamics and structural support. Furthermore, the rear fixed guide vanes must be suitable for the lower gearbox module and the torque transfer shaft. The connecting rudder plate and the bottom fin are designed according to the use requirements of the entire device to ensure that the balance performance and controllability of the entire propeller device reach an appropriate range during normal use.

Claims

1. A motor-driven ducted ship propeller, characterized in that: The hydrodynamic module comprises an electric motor drive module, an upper gearbox module, a slewing module, a mounting module, a shroud, front fixed guide vanes, a rotating vane module, rear fixed guide vanes, a lower gearbox module, a bottom fin, a connecting rudder plate, and a torque transmission shaft. The shroud is connected to the connecting rudder plate, bottom fin, front fixed guide vanes, and rear fixed guide vanes, forming a hydrodynamic module. The hydrodynamic module connects to the slewing module and transmits power to the vessel through the support structure. The drive module transmits torque to the rotating vane module via the upper gearbox module, the torque transmission shaft, and the lower gearbox module.

2. The motor-driven ducted ship propulsion device according to claim 1, characterized in that: The length of the shroud is greater than its diameter, resulting in an elongated shape. Its outer surface is smooth and streamlined, gradually tapering near the middle of its length. The inner surface of the shroud exhibits a streamlined, shrinking, expanding, and shrinking pattern, with the diameter of the inner surface significantly shrinking at the entrance, then gradually expanding, then gradually shrinking again near the middle, and continuing to the exit of the shroud.

3. The motor-driven ducted ship propulsion device according to claim 1, characterized in that: The rotating blade module is completely inside the guide cover, and a front fixed guide blade is arranged in front of the module, and a rear fixed guide blade and a lower gear box module are arranged behind the module, without any externally leaking rotating parts.

4. The motor-driven ducted ship propulsion device according to claim 1, characterized in that: The lower gearbox module is completely inside the guide cover and is fixed inside the guide cover by rear fixed guide vanes, and a torque transmission shaft passes through the middle of one of the fixed guide vanes.

Images