High-thrust rim propeller and advancing tool adopting same

Abstract

The invention discloses a high-thrust rim propeller. The high-thrust rim propeller comprises a rotating shaft, a shell, a motor stator and a motor rotor, the rotating shaft is of a hollow and trumpet-shaped structure and is movably mounted in the end covers on the two sides of the shell through bearings; a sealing assembly is arranged outside the bearing; a propeller is fixedly mounted on a large-end inner ring of the rotating shaft, and a motor rotor is fixedly mounted on a small-end outer ring of the rotating shaft; the motor stator is fixedly mounted on the shell and corresponds to the rotor; a rectifying piece is arranged at the rear end of the propeller and is fixed on the flow guide cover through a connecting rod penetrating through a central channel of the propeller; and the flow guide cover is fixedly arranged on the shell. According to the high-thrust rim propeller, the sealing performance is good, the structural characteristics of the pipeline and the propeller are combined, and the Venturi effect is utilized, so that the contradiction between a high-power driving device and a limited mounting space in the rim propeller and the utilization problem of vortex energy in the pipeline are well solved, the small size of the rim propeller is ensured, and the thrust and the propulsive efficiency are greatly improved.

Description

technical field [0001] The invention belongs to the field of fluid propellers, and in particular relates to a rim propeller with good sealing performance, large thrust, high efficiency and stable operation and a traveling tool using the propeller. Background technique [0002] In recent years, with the development of offshore engineering and water entertainment, the performance requirements of propellers have become higher and higher. The disadvantages of traditional shaft-driven propellers have gradually become prominent, and they can no longer better meet the work requirements. For example, the traditional shaft-driven propeller has many components, complex structure, large cabin space, large energy loss, difficulty in controlling vibration and noise, and high construction and maintenance costs. These defects have led people to gradually turn their attention to more advanced shaftless rim propulsion. system. [0003] There are two types of rim-driven propellers: hubless a...

AI Technical Summary

Problems solved by technology

This kind of rim thruster mainly includes the stator and rotor of the motor, the rotor is cylindrical, the propeller blades are built in the rotor, the magnetic poles in the rotor are evenly distributed on the radial circumference of the propeller, and the stator is directly placed on the outer ring of the propeller , corresponding to the magnetic poles, the rotor is driven to drive the propeller to rotate after being powered on, but it is not difficult to find out from the structure of this kind of rim propeller that the installation space of the stator and rotor of the motor is extremely limited, and the power of the motor is directly related to the volume. In order to reduce water resistance, the conduit is required to be as thin as possible, which further limits the installation space of the motor part, so the power of the propeller is also greatly limited, which has become one of the key technical bottlenecks that limit the high power of the rim propulsion system; and in In a single-propeller propulsion system, the eddy energy in the propeller wake cannot be utilized and cannot be converted into effective propulsion power. At the same time, a dumping moment is generated, which affects the stability of the propeller; The main components not only provide a strong load capacity, but also ensure the rotation accuracy of the shaft. However, when running underwater, in order to prevent water and other impurities from entering the bearing and motor, and to prevent the loss of lubricant, the bearing generally adopts contact type. Sealing, this kind of sealing method has a large friction coefficient, resulting in a relatively high power loss and a large amount of heat generated, which greatly affects the conversion efficiency of the motor

Images